Vendor import of clang release_32 branch r168974 (effectively, 3.2 RC2):vendor/clang/clang-release_32-r168974

http://llvm.org/svn/llvm-project/cfe/branches/release_32@168974

41 files changed, 5560 insertions, 2925 deletions

diff --git a/lib/Sema/AnalysisBasedWarnings.cpp b/lib/Sema/AnalysisBasedWarnings.cpp
index 19a7d6f35c8f..801a1b1e0264 100644
--- a/lib/Sema/AnalysisBasedWarnings.cpp
+++ b/lib/Sema/AnalysisBasedWarnings.cpp
@@ -27,6 +27,7 @@
 #include "clang/AST/StmtObjC.h"
 #include "clang/AST/StmtCXX.h"
 #include "clang/AST/EvaluatedExprVisitor.h"
+#include "clang/AST/ParentMap.h"
 #include "clang/AST/StmtVisitor.h"
 #include "clang/AST/RecursiveASTVisitor.h"
 #include "clang/Analysis/AnalysisContext.h"
@@ -36,10 +37,12 @@
 #include "clang/Analysis/Analyses/ThreadSafety.h"
 #include "clang/Analysis/CFGStmtMap.h"
 #include "clang/Analysis/Analyses/UninitializedValues.h"
+#include "llvm/ADT/ArrayRef.h"
 #include "llvm/ADT/BitVector.h"
 #include "llvm/ADT/FoldingSet.h"
 #include "llvm/ADT/ImmutableMap.h"
 #include "llvm/ADT/PostOrderIterator.h"
+#include "llvm/ADT/SmallString.h"
 #include "llvm/ADT/SmallVector.h"
 #include "llvm/ADT/StringRef.h"
 #include "llvm/Support/Casting.h"
@@ -182,13 +185,6 @@ static ControlFlowKind CheckFallThrough(AnalysisDeclContext &AC) {
       HasFakeEdge = true;
       continue;
     }
-    if (const AsmStmt *AS = dyn_cast<AsmStmt>(S)) {
-      if (AS->isMSAsm()) {
-        HasFakeEdge = true;
-        HasLiveReturn = true;
-        continue;
-      }
-    }
     if (isa<MSAsmStmt>(S)) {
       // TODO: Verify this is correct.
       HasFakeEdge = true;
@@ -506,7 +502,7 @@ static void DiagUninitUse(Sema &S, const VarDecl *VD, const UninitUse &Use,
 
     // Information used when building the diagnostic.
     unsigned DiagKind;
-    const char *Str;
+    StringRef Str;
     SourceRange Range;
 
     // FixIts to suppress the diagnosic by removing the dead condition.
@@ -822,6 +818,18 @@ namespace {
 
 static void DiagnoseSwitchLabelsFallthrough(Sema &S, AnalysisDeclContext &AC,
                                             bool PerFunction) {
+  // Only perform this analysis when using C++11.  There is no good workflow
+  // for this warning when not using C++11.  There is no good way to silence
+  // the warning (no attribute is available) unless we are using C++11's support
+  // for generalized attributes.  Once could use pragmas to silence the warning,
+  // but as a general solution that is gross and not in the spirit of this
+  // warning.
+  //
+  // NOTE: This an intermediate solution.  There are on-going discussions on
+  // how to properly support this warning outside of C++11 with an annotation.
+  if (!AC.getASTContext().getLangOpts().CPlusPlus0x)
+    return;
+
   FallthroughMapper FM(S);
   FM.TraverseStmt(AC.getBody());
 
@@ -859,8 +867,21 @@ static void DiagnoseSwitchLabelsFallthrough(Sema &S, AnalysisDeclContext &AC,
       if (S.getLangOpts().CPlusPlus0x) {
         const Stmt *Term = B.getTerminator();
         if (!(B.empty() && Term && isa<BreakStmt>(Term))) {
+          Preprocessor &PP = S.getPreprocessor();
+          TokenValue Tokens[] = {
+            tok::l_square, tok::l_square, PP.getIdentifierInfo("clang"),
+            tok::coloncolon, PP.getIdentifierInfo("fallthrough"),
+            tok::r_square, tok::r_square
+          };
+          StringRef AnnotationSpelling = "[[clang::fallthrough]]";
+          StringRef MacroName = PP.getLastMacroWithSpelling(L, Tokens);
+          if (!MacroName.empty())
+            AnnotationSpelling = MacroName;
+          SmallString<64> TextToInsert(AnnotationSpelling);
+          TextToInsert += "; ";
           S.Diag(L, diag::note_insert_fallthrough_fixit) <<
-            FixItHint::CreateInsertion(L, "[[clang::fallthrough]]; ");
+              AnnotationSpelling <<
+              FixItHint::CreateInsertion(L, TextToInsert);
         }
       }
       S.Diag(L, diag::note_insert_break_fixit) <<
@@ -878,6 +899,199 @@ static void DiagnoseSwitchLabelsFallthrough(Sema &S, AnalysisDeclContext &AC,
 }
 
 namespace {
+typedef std::pair<const Stmt *,
+                  sema::FunctionScopeInfo::WeakObjectUseMap::const_iterator>
+        StmtUsesPair;
+
+class StmtUseSorter {
+  const SourceManager &SM;
+
+public:
+  explicit StmtUseSorter(const SourceManager &SM) : SM(SM) { }
+
+  bool operator()(const StmtUsesPair &LHS, const StmtUsesPair &RHS) {
+    return SM.isBeforeInTranslationUnit(LHS.first->getLocStart(),
+                                        RHS.first->getLocStart());
+  }
+};
+}
+
+static bool isInLoop(const ASTContext &Ctx, const ParentMap &PM,
+                     const Stmt *S) {
+  assert(S);
+
+  do {
+    switch (S->getStmtClass()) {
+    case Stmt::ForStmtClass:
+    case Stmt::WhileStmtClass:
+    case Stmt::CXXForRangeStmtClass:
+    case Stmt::ObjCForCollectionStmtClass:
+      return true;
+    case Stmt::DoStmtClass: {
+      const Expr *Cond = cast<DoStmt>(S)->getCond();
+      llvm::APSInt Val;
+      if (!Cond->EvaluateAsInt(Val, Ctx))
+        return true;
+      return Val.getBoolValue();
+    }
+    default:
+      break;
+    }
+  } while ((S = PM.getParent(S)));
+
+  return false;
+}
+
+
+static void diagnoseRepeatedUseOfWeak(Sema &S,
+                                      const sema::FunctionScopeInfo *CurFn,
+                                      const Decl *D,
+                                      const ParentMap &PM) {
+  typedef sema::FunctionScopeInfo::WeakObjectProfileTy WeakObjectProfileTy;
+  typedef sema::FunctionScopeInfo::WeakObjectUseMap WeakObjectUseMap;
+  typedef sema::FunctionScopeInfo::WeakUseVector WeakUseVector;
+
+  ASTContext &Ctx = S.getASTContext();
+
+  const WeakObjectUseMap &WeakMap = CurFn->getWeakObjectUses();
+
+  // Extract all weak objects that are referenced more than once.
+  SmallVector<StmtUsesPair, 8> UsesByStmt;
+  for (WeakObjectUseMap::const_iterator I = WeakMap.begin(), E = WeakMap.end();
+       I != E; ++I) {
+    const WeakUseVector &Uses = I->second;
+
+    // Find the first read of the weak object.
+    WeakUseVector::const_iterator UI = Uses.begin(), UE = Uses.end();
+    for ( ; UI != UE; ++UI) {
+      if (UI->isUnsafe())
+        break;
+    }
+
+    // If there were only writes to this object, don't warn.
+    if (UI == UE)
+      continue;
+
+    // If there was only one read, followed by any number of writes, and the
+    // read is not within a loop, don't warn. Additionally, don't warn in a
+    // loop if the base object is a local variable -- local variables are often
+    // changed in loops.
+    if (UI == Uses.begin()) {
+      WeakUseVector::const_iterator UI2 = UI;
+      for (++UI2; UI2 != UE; ++UI2)
+        if (UI2->isUnsafe())
+          break;
+
+      if (UI2 == UE) {
+        if (!isInLoop(Ctx, PM, UI->getUseExpr()))
+          continue;
+
+        const WeakObjectProfileTy &Profile = I->first;
+        if (!Profile.isExactProfile())
+          continue;
+
+        const NamedDecl *Base = Profile.getBase();
+        if (!Base)
+          Base = Profile.getProperty();
+        assert(Base && "A profile always has a base or property.");
+
+        if (const VarDecl *BaseVar = dyn_cast<VarDecl>(Base))
+          if (BaseVar->hasLocalStorage() && !isa<ParmVarDecl>(Base))
+            continue;
+      }
+    }
+
+    UsesByStmt.push_back(StmtUsesPair(UI->getUseExpr(), I));
+  }
+
+  if (UsesByStmt.empty())
+    return;
+
+  // Sort by first use so that we emit the warnings in a deterministic order.
+  std::sort(UsesByStmt.begin(), UsesByStmt.end(),
+            StmtUseSorter(S.getSourceManager()));
+
+  // Classify the current code body for better warning text.
+  // This enum should stay in sync with the cases in
+  // warn_arc_repeated_use_of_weak and warn_arc_possible_repeated_use_of_weak.
+  // FIXME: Should we use a common classification enum and the same set of
+  // possibilities all throughout Sema?
+  enum {
+    Function,
+    Method,
+    Block,
+    Lambda
+  } FunctionKind;
+
+  if (isa<sema::BlockScopeInfo>(CurFn))
+    FunctionKind = Block;
+  else if (isa<sema::LambdaScopeInfo>(CurFn))
+    FunctionKind = Lambda;
+  else if (isa<ObjCMethodDecl>(D))
+    FunctionKind = Method;
+  else
+    FunctionKind = Function;
+
+  // Iterate through the sorted problems and emit warnings for each.
+  for (SmallVectorImpl<StmtUsesPair>::const_iterator I = UsesByStmt.begin(),
+                                                     E = UsesByStmt.end();
+       I != E; ++I) {
+    const Stmt *FirstRead = I->first;
+    const WeakObjectProfileTy &Key = I->second->first;
+    const WeakUseVector &Uses = I->second->second;
+
+    // For complicated expressions like 'a.b.c' and 'x.b.c', WeakObjectProfileTy
+    // may not contain enough information to determine that these are different
+    // properties. We can only be 100% sure of a repeated use in certain cases,
+    // and we adjust the diagnostic kind accordingly so that the less certain
+    // case can be turned off if it is too noisy.
+    unsigned DiagKind;
+    if (Key.isExactProfile())
+      DiagKind = diag::warn_arc_repeated_use_of_weak;
+    else
+      DiagKind = diag::warn_arc_possible_repeated_use_of_weak;
+
+    // Classify the weak object being accessed for better warning text.
+    // This enum should stay in sync with the cases in
+    // warn_arc_repeated_use_of_weak and warn_arc_possible_repeated_use_of_weak.
+    enum {
+      Variable,
+      Property,
+      ImplicitProperty,
+      Ivar
+    } ObjectKind;
+
+    const NamedDecl *D = Key.getProperty();
+    if (isa<VarDecl>(D))
+      ObjectKind = Variable;
+    else if (isa<ObjCPropertyDecl>(D))
+      ObjectKind = Property;
+    else if (isa<ObjCMethodDecl>(D))
+      ObjectKind = ImplicitProperty;
+    else if (isa<ObjCIvarDecl>(D))
+      ObjectKind = Ivar;
+    else
+      llvm_unreachable("Unexpected weak object kind!");
+
+    // Show the first time the object was read.
+    S.Diag(FirstRead->getLocStart(), DiagKind)
+      << ObjectKind << D << FunctionKind
+      << FirstRead->getSourceRange();
+
+    // Print all the other accesses as notes.
+    for (WeakUseVector::const_iterator UI = Uses.begin(), UE = Uses.end();
+         UI != UE; ++UI) {
+      if (UI->getUseExpr() == FirstRead)
+        continue;
+      S.Diag(UI->getUseExpr()->getLocStart(),
+             diag::note_arc_weak_also_accessed_here)
+        << UI->getUseExpr()->getSourceRange();
+    }
+  }
+}
+
+
+namespace {
 struct SLocSort {
   bool operator()(const UninitUse &a, const UninitUse &b) {
     // Prefer a more confident report over a less confident one.
@@ -1091,27 +1305,47 @@ class ThreadSafetyReporter : public clang::thread_safety::ThreadSafetyHandler {
                         diag::warn_variable_requires_any_lock:
                         diag::warn_var_deref_requires_any_lock;
     PartialDiagnosticAt Warning(Loc, S.PDiag(DiagID)
-      << D->getName() << getLockKindFromAccessKind(AK));
+      << D->getNameAsString() << getLockKindFromAccessKind(AK));
     Warnings.push_back(DelayedDiag(Warning, OptionalNotes()));
   }
 
   void handleMutexNotHeld(const NamedDecl *D, ProtectedOperationKind POK,
-                          Name LockName, LockKind LK, SourceLocation Loc) {
+                          Name LockName, LockKind LK, SourceLocation Loc,
+                          Name *PossibleMatch) {
     unsigned DiagID = 0;
-    switch (POK) {
-      case POK_VarAccess:
-        DiagID = diag::warn_variable_requires_lock;
-        break;
-      case POK_VarDereference:
-        DiagID = diag::warn_var_deref_requires_lock;
-        break;
-      case POK_FunctionCall:
-        DiagID = diag::warn_fun_requires_lock;
-        break;
+    if (PossibleMatch) {
+      switch (POK) {
+        case POK_VarAccess:
+          DiagID = diag::warn_variable_requires_lock_precise;
+          break;
+        case POK_VarDereference:
+          DiagID = diag::warn_var_deref_requires_lock_precise;
+          break;
+        case POK_FunctionCall:
+          DiagID = diag::warn_fun_requires_lock_precise;
+          break;
+      }
+      PartialDiagnosticAt Warning(Loc, S.PDiag(DiagID)
+        << D->getNameAsString() << LockName << LK);
+      PartialDiagnosticAt Note(Loc, S.PDiag(diag::note_found_mutex_near_match)
+                               << *PossibleMatch);
+      Warnings.push_back(DelayedDiag(Warning, OptionalNotes(1, Note)));
+    } else {
+      switch (POK) {
+        case POK_VarAccess:
+          DiagID = diag::warn_variable_requires_lock;
+          break;
+        case POK_VarDereference:
+          DiagID = diag::warn_var_deref_requires_lock;
+          break;
+        case POK_FunctionCall:
+          DiagID = diag::warn_fun_requires_lock;
+          break;
+      }
+      PartialDiagnosticAt Warning(Loc, S.PDiag(DiagID)
+        << D->getNameAsString() << LockName << LK);
+      Warnings.push_back(DelayedDiag(Warning, OptionalNotes()));
     }
-    PartialDiagnosticAt Warning(Loc, S.PDiag(DiagID)
-      << D->getName() << LockName << LK);
-    Warnings.push_back(DelayedDiag(Warning, OptionalNotes()));
   }
 
   void handleFunExcludesLock(Name FunName, Name LockName, SourceLocation Loc) {
@@ -1206,7 +1440,8 @@ AnalysisBasedWarnings::IssueWarnings(sema::AnalysisBasedWarnings::Policy P,
   AC.getCFGBuildOptions().AddEHEdges = false;
   AC.getCFGBuildOptions().AddInitializers = true;
   AC.getCFGBuildOptions().AddImplicitDtors = true;
-  
+  AC.getCFGBuildOptions().AddTemporaryDtors = true;
+
   // Force that certain expressions appear as CFGElements in the CFG.  This
   // is used to speed up various analyses.
   // FIXME: This isn't the right factoring.  This is here for initial
@@ -1350,6 +1585,11 @@ AnalysisBasedWarnings::IssueWarnings(sema::AnalysisBasedWarnings::Policy P,
     DiagnoseSwitchLabelsFallthrough(S, AC, !FallThroughDiagFull);
   }
 
+  if (S.getLangOpts().ObjCARCWeak &&
+      Diags.getDiagnosticLevel(diag::warn_arc_repeated_use_of_weak,
+                               D->getLocStart()) != DiagnosticsEngine::Ignored)
+    diagnoseRepeatedUseOfWeak(S, fscope, D, AC.getParentMap());
+
   // Collect statistics about the CFG if it was built.
   if (S.CollectStats && AC.isCFGBuilt()) {
     ++NumFunctionsAnalyzed;
diff --git a/lib/Sema/CMakeLists.txt b/lib/Sema/CMakeLists.txt
index 46dfa05adec1..7cfe3ae8462c 100644
--- a/lib/Sema/CMakeLists.txt
+++ b/lib/Sema/CMakeLists.txt
@@ -13,7 +13,9 @@ add_clang_library(clangSema
   DelayedDiagnostic.cpp
   IdentifierResolver.cpp
   JumpDiagnostics.cpp
+  MultiplexExternalSemaSource.cpp
   Scope.cpp
+  ScopeInfo.cpp
   Sema.cpp
   SemaAccess.cpp
   SemaAttr.cpp
@@ -39,6 +41,7 @@ add_clang_library(clangSema
   SemaOverload.cpp
   SemaPseudoObject.cpp
   SemaStmt.cpp
+  SemaStmtAsm.cpp
   SemaStmtAttr.cpp
   SemaTemplate.cpp
   SemaTemplateDeduction.cpp
diff --git a/lib/Sema/CodeCompleteConsumer.cpp b/lib/Sema/CodeCompleteConsumer.cpp
index a8357255343d..0a236018bdfd 100644
--- a/lib/Sema/CodeCompleteConsumer.cpp
+++ b/lib/Sema/CodeCompleteConsumer.cpp
@@ -193,11 +193,10 @@ CodeCompletionString::CodeCompletionString(const Chunk *Chunks,
                                            CXAvailabilityKind Availability,
                                            const char **Annotations,
                                            unsigned NumAnnotations,
-                                           CXCursorKind ParentKind,
                                            StringRef ParentName,
                                            const char *BriefComment)
   : NumChunks(NumChunks), NumAnnotations(NumAnnotations),
-    Priority(Priority), Availability(Availability), ParentKind(ParentKind),
+    Priority(Priority), Availability(Availability),
     ParentName(ParentName), BriefComment(BriefComment)
 { 
   assert(NumChunks <= 0xffff);
@@ -339,7 +338,7 @@ CodeCompletionString *CodeCompletionBuilder::TakeString() {
     = new (Mem) CodeCompletionString(Chunks.data(), Chunks.size(),
                                      Priority, Availability,
                                      Annotations.data(), Annotations.size(),
-                                     ParentKind, ParentName, BriefComment);
+                                     ParentName, BriefComment);
   Chunks.clear();
   return Result;
 }
@@ -380,7 +379,6 @@ void CodeCompletionBuilder::AddChunk(CodeCompletionString::ChunkKind CK,
 
 void CodeCompletionBuilder::addParentContext(DeclContext *DC) {
   if (DC->isTranslationUnit()) {
-    ParentKind = CXCursor_TranslationUnit;
     return;
   }
   
@@ -391,7 +389,6 @@ void CodeCompletionBuilder::addParentContext(DeclContext *DC) {
   if (!ND)
     return;
   
-  ParentKind = getCursorKindForDecl(ND);
   ParentName = getCodeCompletionTUInfo().getParentName(DC);
 }
 
diff --git a/lib/Sema/DeclSpec.cpp b/lib/Sema/DeclSpec.cpp
index d12ca7839095..b3066eb08013 100644
--- a/lib/Sema/DeclSpec.cpp
+++ b/lib/Sema/DeclSpec.cpp
@@ -144,11 +144,13 @@ CXXScopeSpec::getWithLocInContext(ASTContext &Context) const {
 
 /// DeclaratorChunk::getFunction - Return a DeclaratorChunk for a function.
 /// "TheDeclarator" is the declarator that this will be added to.
-DeclaratorChunk DeclaratorChunk::getFunction(bool hasProto, bool isVariadic,
+DeclaratorChunk DeclaratorChunk::getFunction(bool hasProto,
                                              bool isAmbiguous,
-                                             SourceLocation EllipsisLoc,
+                                             SourceLocation LParenLoc,
                                              ParamInfo *ArgInfo,
                                              unsigned NumArgs,
+                                             SourceLocation EllipsisLoc,
+                                             SourceLocation RParenLoc,
                                              unsigned TypeQuals,
                                              bool RefQualifierIsLvalueRef,
                                              SourceLocation RefQualifierLoc,
@@ -173,9 +175,11 @@ DeclaratorChunk DeclaratorChunk::getFunction(bool hasProto, bool isVariadic,
   I.EndLoc                      = LocalRangeEnd;
   I.Fun.AttrList                = 0;
   I.Fun.hasPrototype            = hasProto;
-  I.Fun.isVariadic              = isVariadic;
+  I.Fun.isVariadic              = EllipsisLoc.isValid();
   I.Fun.isAmbiguous             = isAmbiguous;
+  I.Fun.LParenLoc               = LParenLoc.getRawEncoding();
   I.Fun.EllipsisLoc             = EllipsisLoc.getRawEncoding();
+  I.Fun.RParenLoc               = RParenLoc.getRawEncoding();
   I.Fun.DeleteArgInfo           = false;
   I.Fun.TypeQuals               = TypeQuals;
   I.Fun.NumArgs                 = NumArgs;
@@ -270,6 +274,7 @@ bool Declarator::isDeclarationOfFunction() const {
     case TST_int:
     case TST_int128:
     case TST_struct:
+    case TST_interface:
     case TST_union:
     case TST_unknown_anytype:
     case TST_unspecified:
@@ -325,10 +330,14 @@ unsigned DeclSpec::getParsedSpecifiers() const {
 
 template <class T> static bool BadSpecifier(T TNew, T TPrev,
                                             const char *&PrevSpec,
-                                            unsigned &DiagID) {
+                                            unsigned &DiagID,
+                                            bool IsExtension = true) {
   PrevSpec = DeclSpec::getSpecifierName(TPrev);
-  DiagID = (TNew == TPrev ? diag::ext_duplicate_declspec
-            : diag::err_invalid_decl_spec_combination);
+  if (TNew != TPrev)
+    DiagID = diag::err_invalid_decl_spec_combination;
+  else
+    DiagID = IsExtension ? diag::ext_duplicate_declspec : 
+                           diag::warn_duplicate_declspec;    
   return true;
 }
 
@@ -396,6 +405,7 @@ const char *DeclSpec::getSpecifierName(DeclSpec::TST T) {
   case DeclSpec::TST_class:       return "class";
   case DeclSpec::TST_union:       return "union";
   case DeclSpec::TST_struct:      return "struct";
+  case DeclSpec::TST_interface:   return "__interface";
   case DeclSpec::TST_typename:    return "type-name";
   case DeclSpec::TST_typeofType:
   case DeclSpec::TST_typeofExpr:  return "typeof";
@@ -670,12 +680,16 @@ bool DeclSpec::SetTypeSpecError() {
 }
 
 bool DeclSpec::SetTypeQual(TQ T, SourceLocation Loc, const char *&PrevSpec,
-                           unsigned &DiagID, const LangOptions &Lang,
-                           bool IsTypeSpec) {
-  // Duplicates are permitted in C99, and are permitted in C++11 unless the
-  // cv-qualifier appears as a type-specifier.
-  if ((TypeQualifiers & T) && !Lang.C99 && (!Lang.CPlusPlus0x || IsTypeSpec))
-    return BadSpecifier(T, T, PrevSpec, DiagID);
+                           unsigned &DiagID, const LangOptions &Lang) {
+  // Duplicates are permitted in C99, but are not permitted in C++. However,
+  // since this is likely not what the user intended, we will always warn.  We
+  // do not need to set the qualifier's location since we already have it.
+  if (TypeQualifiers & T) {
+    bool IsExtension = true;
+    if (Lang.C99)
+      IsExtension = false;
+    return BadSpecifier(T, T, PrevSpec, DiagID, IsExtension);
+  }
   TypeQualifiers |= T;
 
   switch (T) {
diff --git a/lib/Sema/DelayedDiagnostic.cpp b/lib/Sema/DelayedDiagnostic.cpp
index 876f9d7a9545..310043288554 100644
--- a/lib/Sema/DelayedDiagnostic.cpp
+++ b/lib/Sema/DelayedDiagnostic.cpp
@@ -22,6 +22,7 @@ using namespace sema;
 DelayedDiagnostic DelayedDiagnostic::makeDeprecation(SourceLocation Loc,
                                     const NamedDecl *D,
                                     const ObjCInterfaceDecl *UnknownObjCClass,
+                                    const ObjCPropertyDecl  *ObjCProperty,
                                     StringRef Msg) {
   DelayedDiagnostic DD;
   DD.Kind = Deprecation;
@@ -29,6 +30,7 @@ DelayedDiagnostic DelayedDiagnostic::makeDeprecation(SourceLocation Loc,
   DD.Loc = Loc;
   DD.DeprecationData.Decl = D;
   DD.DeprecationData.UnknownObjCClass = UnknownObjCClass;
+  DD.DeprecationData.ObjCProperty = ObjCProperty;
   char *MessageData = 0;
   if (Msg.size()) {
     MessageData = new char [Msg.size()];
diff --git a/lib/Sema/IdentifierResolver.cpp b/lib/Sema/IdentifierResolver.cpp
index 4d62cab16765..00939151c673 100644
--- a/lib/Sema/IdentifierResolver.cpp
+++ b/lib/Sema/IdentifierResolver.cpp
@@ -135,8 +135,16 @@ bool IdentifierResolver::isDeclInScope(Decl *D, DeclContext *Ctx,
       // of the controlled statement.
       //
       assert(S->getParent() && "No TUScope?");
-      if (S->getParent()->getFlags() & Scope::ControlScope)
+      if (S->getFlags() & Scope::FnTryScope)
         return S->getParent()->isDeclScope(D);
+      if (S->getParent()->getFlags() & Scope::ControlScope) {
+        if (S->getParent()->getFlags() & Scope::FnCatchScope) {
+          S = S->getParent();
+          if (S->isDeclScope(D))
+            return true;
+        }
+        return S->getParent()->isDeclScope(D);
+      }
     }
     return false;
   }
diff --git a/lib/Sema/JumpDiagnostics.cpp b/lib/Sema/JumpDiagnostics.cpp
index ab786c65aab9..e2ec1ccebdcf 100644
--- a/lib/Sema/JumpDiagnostics.cpp
+++ b/lib/Sema/JumpDiagnostics.cpp
@@ -123,7 +123,7 @@ typedef std::pair<unsigned,unsigned> ScopePair;
 /// diagnostic that should be emitted if control goes over it. If not, return 0.
 static ScopePair GetDiagForGotoScopeDecl(ASTContext &Context, const Decl *D) {
   if (const VarDecl *VD = dyn_cast<VarDecl>(D)) {
-    unsigned InDiag = 0, OutDiag = 0;
+    unsigned InDiag = 0;
     if (VD->getType()->isVariablyModifiedType())
       InDiag = diag::note_protected_by_vla;
 
@@ -164,43 +164,53 @@ static ScopePair GetDiagForGotoScopeDecl(ASTContext &Context, const Decl *D) {
       //   where it is in scope is ill-formed unless the variable has
       //   POD type and is declared without an initializer.
 
-      if (const Expr *init = VD->getInit()) {
-        // We actually give variables of record type (or array thereof)
-        // an initializer even if that initializer only calls a trivial
-        // ctor.  Detect that case.
-        // FIXME: With generalized initializer lists, this may
-        // classify "X x{};" as having no initializer.
-        unsigned inDiagToUse = diag::note_protected_by_variable_init;
-
-        const CXXRecordDecl *record = 0;
-
-        if (const CXXConstructExpr *cce = dyn_cast<CXXConstructExpr>(init)) {
-          const CXXConstructorDecl *ctor = cce->getConstructor();
-          record = ctor->getParent();
-
-          if (ctor->isTrivial() && ctor->isDefaultConstructor()) {
-            if (!record->hasTrivialDestructor())
-              inDiagToUse = diag::note_protected_by_variable_nontriv_destructor;
-            else if (!record->isPOD())
-              inDiagToUse = diag::note_protected_by_variable_non_pod;
-            else
-              inDiagToUse = 0;
-          }
-        } else if (VD->getType()->isArrayType()) {
-          record = VD->getType()->getBaseElementTypeUnsafe()
-                                ->getAsCXXRecordDecl();
+      const Expr *Init = VD->getInit();
+      if (!Init)
+        return ScopePair(InDiag, 0);
+
+      const ExprWithCleanups *EWC = dyn_cast<ExprWithCleanups>(Init);
+      if (EWC)
+        Init = EWC->getSubExpr();
+
+      const MaterializeTemporaryExpr *M = NULL;
+      Init = Init->findMaterializedTemporary(M);
+
+      SmallVector<SubobjectAdjustment, 2> Adjustments;
+      Init = Init->skipRValueSubobjectAdjustments(Adjustments);
+
+      QualType QT = Init->getType();
+      if (QT.isNull())
+        return ScopePair(diag::note_protected_by_variable_init, 0);
+
+      const Type *T = QT.getTypePtr();
+      if (T->isArrayType())
+        T = T->getBaseElementTypeUnsafe();
+
+      const CXXRecordDecl *Record = T->getAsCXXRecordDecl();
+      if (!Record)
+        return ScopePair(diag::note_protected_by_variable_init, 0);
+
+      // If we need to call a non trivial destructor for this variable,
+      // record an out diagnostic.
+      unsigned OutDiag = 0;
+      if (!Init->isGLValue() && !Record->hasTrivialDestructor())
+        OutDiag = diag::note_exits_dtor;
+
+      if (const CXXConstructExpr *cce = dyn_cast<CXXConstructExpr>(Init)) {
+        const CXXConstructorDecl *ctor = cce->getConstructor();
+        if (ctor->isTrivial() && ctor->isDefaultConstructor()) {
+          if (OutDiag)
+            InDiag = diag::note_protected_by_variable_nontriv_destructor;
+          else if (!Record->isPOD())
+            InDiag = diag::note_protected_by_variable_non_pod;
+          return ScopePair(InDiag, OutDiag);
         }
-
-        if (inDiagToUse)
-          InDiag = inDiagToUse;
-
-        // Also object to indirect jumps which leave scopes with dtors.
-        if (record && !record->hasTrivialDestructor())
-          OutDiag = diag::note_exits_dtor;
       }
+
+      return ScopePair(diag::note_protected_by_variable_init, OutDiag);
     }
-    
-    return ScopePair(InDiag, OutDiag);    
+
+    return ScopePair(InDiag, 0);
   }
 
   if (const TypedefDecl *TD = dyn_cast<TypedefDecl>(D)) {
@@ -322,6 +332,29 @@ void JumpScopeChecker::BuildScopeInformation(Stmt *S, unsigned &origParentScope)
     Jumps.push_back(S);
     break;
 
+  case Stmt::CXXTryStmtClass: {
+    CXXTryStmt *TS = cast<CXXTryStmt>(S);
+    unsigned newParentScope;
+    Scopes.push_back(GotoScope(ParentScope,
+                               diag::note_protected_by_cxx_try,
+                               diag::note_exits_cxx_try,
+                               TS->getSourceRange().getBegin()));
+    if (Stmt *TryBlock = TS->getTryBlock())
+      BuildScopeInformation(TryBlock, (newParentScope = Scopes.size()-1));
+
+    // Jump from the catch into the try is not allowed either.
+    for (unsigned I = 0, E = TS->getNumHandlers(); I != E; ++I) {
+      CXXCatchStmt *CS = TS->getHandler(I);
+      Scopes.push_back(GotoScope(ParentScope,
+                                 diag::note_protected_by_cxx_catch,
+                                 diag::note_exits_cxx_catch,
+                                 CS->getSourceRange().getBegin()));
+      BuildScopeInformation(CS->getHandlerBlock(), 
+                            (newParentScope = Scopes.size()-1));
+    }
+    return;
+  }
+
   default:
     break;
   }
@@ -418,30 +451,6 @@ void JumpScopeChecker::BuildScopeInformation(Stmt *S, unsigned &origParentScope)
       continue;
     }
 
-    // Disallow jumps into any part of a C++ try statement. This is pretty
-    // much the same as for Obj-C.
-    if (CXXTryStmt *TS = dyn_cast<CXXTryStmt>(SubStmt)) {
-      Scopes.push_back(GotoScope(ParentScope,
-                                 diag::note_protected_by_cxx_try,
-                                 diag::note_exits_cxx_try,
-                                 TS->getSourceRange().getBegin()));
-      if (Stmt *TryBlock = TS->getTryBlock())
-        BuildScopeInformation(TryBlock, (newParentScope = Scopes.size()-1));
-
-      // Jump from the catch into the try is not allowed either.
-      for (unsigned I = 0, E = TS->getNumHandlers(); I != E; ++I) {
-        CXXCatchStmt *CS = TS->getHandler(I);
-        Scopes.push_back(GotoScope(ParentScope,
-                                   diag::note_protected_by_cxx_catch,
-                                   diag::note_exits_cxx_catch,
-                                   CS->getSourceRange().getBegin()));
-        BuildScopeInformation(CS->getHandlerBlock(), 
-                              (newParentScope = Scopes.size()-1));
-      }
-
-      continue;
-    }
-
     // Disallow jumps into the protected statement of an @autoreleasepool.
     if (ObjCAutoreleasePoolStmt *AS = dyn_cast<ObjCAutoreleasePoolStmt>(SubStmt)){
       // Recursively walk the AST for the @autoreleasepool part, protected by a new
@@ -453,14 +462,19 @@ void JumpScopeChecker::BuildScopeInformation(Stmt *S, unsigned &origParentScope)
       BuildScopeInformation(AS->getSubStmt(), (newParentScope = Scopes.size()-1));
       continue;
     }
-    
-    if (const BlockExpr *BE = dyn_cast<BlockExpr>(SubStmt)) {
-        const BlockDecl *BDecl = BE->getBlockDecl();
+
+    // Disallow jumps past full-expressions that use blocks with
+    // non-trivial cleanups of their captures.  This is theoretically
+    // implementable but a lot of work which we haven't felt up to doing.
+    if (ExprWithCleanups *EWC = dyn_cast<ExprWithCleanups>(SubStmt)) {
+      for (unsigned i = 0, e = EWC->getNumObjects(); i != e; ++i) {
+        const BlockDecl *BDecl = EWC->getObject(i);
         for (BlockDecl::capture_const_iterator ci = BDecl->capture_begin(),
              ce = BDecl->capture_end(); ci != ce; ++ci) {
           VarDecl *variable = ci->getVariable();
           BuildScopeInformation(variable, BDecl, ParentScope);
         }
+      }
     }
     
     // Recursively walk the AST.
diff --git a/lib/Sema/MultiplexExternalSemaSource.cpp b/lib/Sema/MultiplexExternalSemaSource.cpp
new file mode 100644
index 000000000000..f930fb348a25
--- /dev/null
+++ b/lib/Sema/MultiplexExternalSemaSource.cpp
@@ -0,0 +1,271 @@
+//===--- MultiplexExternalSemaSource.cpp  ---------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements the event dispatching to the subscribed clients.
+//
+//===----------------------------------------------------------------------===//
+#include "clang/Sema/MultiplexExternalSemaSource.h"
+
+#include "clang/AST/DeclContextInternals.h"
+#include "clang/Sema/Lookup.h"
+
+using namespace clang;
+
+///\brief Constructs a new multiplexing external sema source and appends the
+/// given element to it.
+///
+///\param[in] source - An ExternalSemaSource.
+///
+MultiplexExternalSemaSource::MultiplexExternalSemaSource(ExternalSemaSource &s1,
+                                                        ExternalSemaSource &s2){
+  Sources.push_back(&s1);
+  Sources.push_back(&s2);
+}
+
+// pin the vtable here.
+MultiplexExternalSemaSource::~MultiplexExternalSemaSource() {}
+
+///\brief Appends new source to the source list.
+///
+///\param[in] source - An ExternalSemaSource.
+///
+void MultiplexExternalSemaSource::addSource(ExternalSemaSource &source) {
+  Sources.push_back(&source);
+}
+
+//===----------------------------------------------------------------------===//
+// ExternalASTSource.
+//===----------------------------------------------------------------------===//
+
+Decl *MultiplexExternalSemaSource::GetExternalDecl(uint32_t ID) {
+  for(size_t i = 0; i < Sources.size(); ++i)
+    if (Decl *Result = Sources[i]->GetExternalDecl(ID))
+      return Result;
+  return 0;
+}
+
+Selector MultiplexExternalSemaSource::GetExternalSelector(uint32_t ID) {
+  Selector Sel;
+  for(size_t i = 0; i < Sources.size(); ++i) {
+    Sel = Sources[i]->GetExternalSelector(ID);
+    if (!Sel.isNull())
+      return Sel;
+  }
+  return Sel;
+}
+
+uint32_t MultiplexExternalSemaSource::GetNumExternalSelectors() {
+  uint32_t total = 0;
+  for(size_t i = 0; i < Sources.size(); ++i)
+    total += Sources[i]->GetNumExternalSelectors();
+  return total;
+}
+
+Stmt *MultiplexExternalSemaSource::GetExternalDeclStmt(uint64_t Offset) {
+  for(size_t i = 0; i < Sources.size(); ++i)
+    if (Stmt *Result = Sources[i]->GetExternalDeclStmt(Offset))
+      return Result;
+  return 0;
+}
+
+CXXBaseSpecifier *MultiplexExternalSemaSource::GetExternalCXXBaseSpecifiers(
+                                                               uint64_t Offset){
+  for(size_t i = 0; i < Sources.size(); ++i)
+    if (CXXBaseSpecifier *R = Sources[i]->GetExternalCXXBaseSpecifiers(Offset))
+      return R;
+  return 0; 
+}
+
+DeclContextLookupResult MultiplexExternalSemaSource::
+FindExternalVisibleDeclsByName(const DeclContext *DC, DeclarationName Name) {
+  StoredDeclsList DeclsFound;
+  DeclContextLookupResult lookup;
+  for(size_t i = 0; i < Sources.size(); ++i) {
+    lookup = Sources[i]->FindExternalVisibleDeclsByName(DC, Name);
+    while(lookup.first != lookup.second) {
+      if (!DeclsFound.HandleRedeclaration(*lookup.first))
+        DeclsFound.AddSubsequentDecl(*lookup.first);
+      lookup.first++;
+    }
+  }
+  return DeclsFound.getLookupResult(); 
+}
+
+void MultiplexExternalSemaSource::completeVisibleDeclsMap(const DeclContext *DC){
+  for(size_t i = 0; i < Sources.size(); ++i)
+    Sources[i]->completeVisibleDeclsMap(DC);
+}
+
+ExternalLoadResult MultiplexExternalSemaSource::
+FindExternalLexicalDecls(const DeclContext *DC,
+                         bool (*isKindWeWant)(Decl::Kind),
+                         SmallVectorImpl<Decl*> &Result) {
+  for(size_t i = 0; i < Sources.size(); ++i)
+    // FIXME: The semantics of the return result is unclear to me...
+    Sources[i]->FindExternalLexicalDecls(DC, isKindWeWant, Result);
+
+  return ELR_Success;
+}
+
+void MultiplexExternalSemaSource::FindFileRegionDecls(FileID File, 
+                                                      unsigned Offset,
+                                                      unsigned Length,
+                                                SmallVectorImpl<Decl *> &Decls){
+  for(size_t i = 0; i < Sources.size(); ++i)
+    Sources[i]->FindFileRegionDecls(File, Offset, Length, Decls);
+}
+
+void MultiplexExternalSemaSource::CompleteType(TagDecl *Tag) {
+  for(size_t i = 0; i < Sources.size(); ++i)
+    Sources[i]->CompleteType(Tag);
+}
+
+void MultiplexExternalSemaSource::CompleteType(ObjCInterfaceDecl *Class) {
+  for(size_t i = 0; i < Sources.size(); ++i)
+    Sources[i]->CompleteType(Class);
+}
+
+void MultiplexExternalSemaSource::ReadComments() {
+  for(size_t i = 0; i < Sources.size(); ++i)
+    Sources[i]->ReadComments();
+}
+
+void MultiplexExternalSemaSource::StartedDeserializing() {
+  for(size_t i = 0; i < Sources.size(); ++i)
+    Sources[i]->StartedDeserializing();
+}
+
+void MultiplexExternalSemaSource::FinishedDeserializing() {
+  for(size_t i = 0; i < Sources.size(); ++i)
+    Sources[i]->FinishedDeserializing();
+}
+
+void MultiplexExternalSemaSource::StartTranslationUnit(ASTConsumer *Consumer) {
+  for(size_t i = 0; i < Sources.size(); ++i)
+    Sources[i]->StartTranslationUnit(Consumer);
+}
+
+void MultiplexExternalSemaSource::PrintStats() {
+  for(size_t i = 0; i < Sources.size(); ++i)
+    Sources[i]->PrintStats();
+}
+
+bool MultiplexExternalSemaSource::layoutRecordType(const RecordDecl *Record,
+                                                   uint64_t &Size, 
+                                                   uint64_t &Alignment,
+                      llvm::DenseMap<const FieldDecl *, uint64_t> &FieldOffsets,
+                  llvm::DenseMap<const CXXRecordDecl *, CharUnits> &BaseOffsets,
+          llvm::DenseMap<const CXXRecordDecl *, CharUnits> &VirtualBaseOffsets){
+  for(size_t i = 0; i < Sources.size(); ++i)
+    if (Sources[i]->layoutRecordType(Record, Size, Alignment, FieldOffsets, 
+                                     BaseOffsets, VirtualBaseOffsets))
+      return true;
+  return false;
+}
+
+void MultiplexExternalSemaSource::
+getMemoryBufferSizes(MemoryBufferSizes &sizes) const {
+  for(size_t i = 0; i < Sources.size(); ++i)
+    Sources[i]->getMemoryBufferSizes(sizes);
+
+}
+
+//===----------------------------------------------------------------------===//
+// ExternalSemaSource.
+//===----------------------------------------------------------------------===//
+
+
+void MultiplexExternalSemaSource::InitializeSema(Sema &S) {
+  for(size_t i = 0; i < Sources.size(); ++i)
+    Sources[i]->InitializeSema(S);
+}
+
+void MultiplexExternalSemaSource::ForgetSema() {
+  for(size_t i = 0; i < Sources.size(); ++i)
+    Sources[i]->ForgetSema();
+}
+
+void MultiplexExternalSemaSource::ReadMethodPool(Selector Sel) {
+  for(size_t i = 0; i < Sources.size(); ++i)
+    Sources[i]->ReadMethodPool(Sel);
+}
+
+void MultiplexExternalSemaSource::ReadKnownNamespaces(
+                                   SmallVectorImpl<NamespaceDecl*> &Namespaces){
+  for(size_t i = 0; i < Sources.size(); ++i)
+    Sources[i]->ReadKnownNamespaces(Namespaces);
+}
+  
+bool MultiplexExternalSemaSource::LookupUnqualified(LookupResult &R, Scope *S){ 
+  for(size_t i = 0; i < Sources.size(); ++i)
+    Sources[i]->LookupUnqualified(R, S);
+  
+  return !R.empty();
+}
+
+void MultiplexExternalSemaSource::ReadTentativeDefinitions(
+                                     SmallVectorImpl<VarDecl*> &TentativeDefs) {
+  for(size_t i = 0; i < Sources.size(); ++i)
+    Sources[i]->ReadTentativeDefinitions(TentativeDefs);
+}
+  
+void MultiplexExternalSemaSource::ReadUnusedFileScopedDecls(
+                                SmallVectorImpl<const DeclaratorDecl*> &Decls) {
+  for(size_t i = 0; i < Sources.size(); ++i)
+    Sources[i]->ReadUnusedFileScopedDecls(Decls);
+}
+  
+void MultiplexExternalSemaSource::ReadDelegatingConstructors(
+                                  SmallVectorImpl<CXXConstructorDecl*> &Decls) {
+  for(size_t i = 0; i < Sources.size(); ++i)
+    Sources[i]->ReadDelegatingConstructors(Decls);
+}
+
+void MultiplexExternalSemaSource::ReadExtVectorDecls(
+                                     SmallVectorImpl<TypedefNameDecl*> &Decls) {
+  for(size_t i = 0; i < Sources.size(); ++i)
+    Sources[i]->ReadExtVectorDecls(Decls);
+}
+
+void MultiplexExternalSemaSource::ReadDynamicClasses(
+                                       SmallVectorImpl<CXXRecordDecl*> &Decls) {
+  for(size_t i = 0; i < Sources.size(); ++i)
+    Sources[i]->ReadDynamicClasses(Decls);
+}
+
+void MultiplexExternalSemaSource::ReadLocallyScopedExternalDecls(
+                                           SmallVectorImpl<NamedDecl*> &Decls) {
+  for(size_t i = 0; i < Sources.size(); ++i)
+    Sources[i]->ReadLocallyScopedExternalDecls(Decls);
+}
+
+void MultiplexExternalSemaSource::ReadReferencedSelectors(
+                  SmallVectorImpl<std::pair<Selector, SourceLocation> > &Sels) {
+  for(size_t i = 0; i < Sources.size(); ++i)
+    Sources[i]->ReadReferencedSelectors(Sels);
+}
+
+void MultiplexExternalSemaSource::ReadWeakUndeclaredIdentifiers(
+                   SmallVectorImpl<std::pair<IdentifierInfo*, WeakInfo> > &WI) {
+  for(size_t i = 0; i < Sources.size(); ++i)
+    Sources[i]->ReadWeakUndeclaredIdentifiers(WI);
+}
+
+void MultiplexExternalSemaSource::ReadUsedVTables(
+                                  SmallVectorImpl<ExternalVTableUse> &VTables) {
+  for(size_t i = 0; i < Sources.size(); ++i)
+    Sources[i]->ReadUsedVTables(VTables);
+}
+
+void MultiplexExternalSemaSource::ReadPendingInstantiations(
+                                           SmallVectorImpl<std::pair<ValueDecl*,
+                                                   SourceLocation> > &Pending) {
+  for(size_t i = 0; i < Sources.size(); ++i)
+    Sources[i]->ReadPendingInstantiations(Pending);
+}
diff --git a/lib/Sema/ScopeInfo.cpp b/lib/Sema/ScopeInfo.cpp
new file mode 100644
index 000000000000..4d29a34a73ef
--- /dev/null
+++ b/lib/Sema/ScopeInfo.cpp
@@ -0,0 +1,189 @@
+//===--- ScopeInfo.cpp - Information about a semantic context -------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements FunctionScopeInfo and its subclasses, which contain
+// information about a single function, block, lambda, or method body.
+//
+//===----------------------------------------------------------------------===//
+
+#include "clang/Sema/ScopeInfo.h"
+#include "clang/AST/Decl.h"
+#include "clang/AST/DeclObjC.h"
+#include "clang/AST/Expr.h"
+#include "clang/AST/ExprCXX.h"
+#include "clang/AST/ExprObjC.h"
+
+using namespace clang;
+using namespace sema;
+
+void FunctionScopeInfo::Clear() {
+  HasBranchProtectedScope = false;
+  HasBranchIntoScope = false;
+  HasIndirectGoto = false;
+
+  SwitchStack.clear();
+  Returns.clear();
+  ErrorTrap.reset();
+  PossiblyUnreachableDiags.clear();
+  WeakObjectUses.clear();
+}
+
+static const NamedDecl *getBestPropertyDecl(const ObjCPropertyRefExpr *PropE) {
+  if (PropE->isExplicitProperty())
+    return PropE->getExplicitProperty();
+
+  return PropE->getImplicitPropertyGetter();
+}
+
+FunctionScopeInfo::WeakObjectProfileTy::BaseInfoTy
+FunctionScopeInfo::WeakObjectProfileTy::getBaseInfo(const Expr *E) {
+  E = E->IgnoreParenCasts();
+
+  const NamedDecl *D = 0;
+  bool IsExact = false;
+
+  switch (E->getStmtClass()) {
+  case Stmt::DeclRefExprClass:
+    D = cast<DeclRefExpr>(E)->getDecl();
+    IsExact = isa<VarDecl>(D);
+    break;
+  case Stmt::MemberExprClass: {
+    const MemberExpr *ME = cast<MemberExpr>(E);
+    D = ME->getMemberDecl();
+    IsExact = isa<CXXThisExpr>(ME->getBase()->IgnoreParenImpCasts());
+    break;
+  }
+  case Stmt::ObjCIvarRefExprClass: {
+    const ObjCIvarRefExpr *IE = cast<ObjCIvarRefExpr>(E);
+    D = IE->getDecl();
+    IsExact = IE->getBase()->isObjCSelfExpr();
+    break;
+  }
+  case Stmt::PseudoObjectExprClass: {
+    const PseudoObjectExpr *POE = cast<PseudoObjectExpr>(E);
+    const ObjCPropertyRefExpr *BaseProp =
+      dyn_cast<ObjCPropertyRefExpr>(POE->getSyntacticForm());
+    if (BaseProp) {
+      D = getBestPropertyDecl(BaseProp);
+
+      const Expr *DoubleBase = BaseProp->getBase();
+      if (const OpaqueValueExpr *OVE = dyn_cast<OpaqueValueExpr>(DoubleBase))
+        DoubleBase = OVE->getSourceExpr();
+
+      IsExact = DoubleBase->isObjCSelfExpr();
+    }
+    break;
+  }
+  default:
+    break;
+  }
+
+  return BaseInfoTy(D, IsExact);
+}
+
+
+FunctionScopeInfo::WeakObjectProfileTy::WeakObjectProfileTy(
+                                          const ObjCPropertyRefExpr *PropE)
+    : Base(0, true), Property(getBestPropertyDecl(PropE)) {
+
+  if (PropE->isObjectReceiver()) {
+    const OpaqueValueExpr *OVE = cast<OpaqueValueExpr>(PropE->getBase());
+    const Expr *E = OVE->getSourceExpr();
+    Base = getBaseInfo(E);
+  } else if (PropE->isClassReceiver()) {
+    Base.setPointer(PropE->getClassReceiver());
+  } else {
+    assert(PropE->isSuperReceiver());
+  }
+}
+
+FunctionScopeInfo::WeakObjectProfileTy::WeakObjectProfileTy(const Expr *BaseE,
+                                                const ObjCPropertyDecl *Prop)
+    : Base(0, true), Property(Prop) {
+  if (BaseE)
+    Base = getBaseInfo(BaseE);
+  // else, this is a message accessing a property on super.
+}
+
+FunctionScopeInfo::WeakObjectProfileTy::WeakObjectProfileTy(
+                                                      const DeclRefExpr *DRE)
+  : Base(0, true), Property(DRE->getDecl()) {
+  assert(isa<VarDecl>(Property));
+}
+
+FunctionScopeInfo::WeakObjectProfileTy::WeakObjectProfileTy(
+                                                  const ObjCIvarRefExpr *IvarE)
+  : Base(getBaseInfo(IvarE->getBase())), Property(IvarE->getDecl()) {
+}
+
+void FunctionScopeInfo::recordUseOfWeak(const ObjCMessageExpr *Msg,
+                                        const ObjCPropertyDecl *Prop) {
+  assert(Msg && Prop);
+  WeakUseVector &Uses =
+    WeakObjectUses[WeakObjectProfileTy(Msg->getInstanceReceiver(), Prop)];
+  Uses.push_back(WeakUseTy(Msg, Msg->getNumArgs() == 0));
+}
+
+void FunctionScopeInfo::markSafeWeakUse(const Expr *E) {
+  E = E->IgnoreParenCasts();
+
+  if (const PseudoObjectExpr *POE = dyn_cast<PseudoObjectExpr>(E)) {
+    markSafeWeakUse(POE->getSyntacticForm());
+    return;
+  }
+
+  if (const ConditionalOperator *Cond = dyn_cast<ConditionalOperator>(E)) {
+    markSafeWeakUse(Cond->getTrueExpr());
+    markSafeWeakUse(Cond->getFalseExpr());
+    return;
+  }
+
+  if (const BinaryConditionalOperator *Cond =
+        dyn_cast<BinaryConditionalOperator>(E)) {
+    markSafeWeakUse(Cond->getCommon());
+    markSafeWeakUse(Cond->getFalseExpr());
+    return;
+  }
+
+  // Has this weak object been seen before?
+  FunctionScopeInfo::WeakObjectUseMap::iterator Uses;
+  if (const ObjCPropertyRefExpr *RefExpr = dyn_cast<ObjCPropertyRefExpr>(E))
+    Uses = WeakObjectUses.find(WeakObjectProfileTy(RefExpr));
+  else if (const ObjCIvarRefExpr *IvarE = dyn_cast<ObjCIvarRefExpr>(E))
+    Uses = WeakObjectUses.find(WeakObjectProfileTy(IvarE));
+  else if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E))
+    Uses = WeakObjectUses.find(WeakObjectProfileTy(DRE));
+  else if (const ObjCMessageExpr *MsgE = dyn_cast<ObjCMessageExpr>(E)) {
+    Uses = WeakObjectUses.end();
+    if (const ObjCMethodDecl *MD = MsgE->getMethodDecl()) {
+      if (const ObjCPropertyDecl *Prop = MD->findPropertyDecl()) {
+        Uses =
+          WeakObjectUses.find(WeakObjectProfileTy(MsgE->getInstanceReceiver(),
+                                                  Prop));
+      }
+    }
+  }
+  else
+    return;
+
+  if (Uses == WeakObjectUses.end())
+    return;
+
+  // Has there been a read from the object using this Expr?
+  FunctionScopeInfo::WeakUseVector::reverse_iterator ThisUse =
+    std::find(Uses->second.rbegin(), Uses->second.rend(), WeakUseTy(E, true));
+  if (ThisUse == Uses->second.rend())
+    return;
+
+  ThisUse->markSafe();
+}
+
+FunctionScopeInfo::~FunctionScopeInfo() { }
+BlockScopeInfo::~BlockScopeInfo() { }
+LambdaScopeInfo::~LambdaScopeInfo() { }
diff --git a/lib/Sema/Sema.cpp b/lib/Sema/Sema.cpp
index 7f79f0c6d98a..13a33b785b43 100644
--- a/lib/Sema/Sema.cpp
+++ b/lib/Sema/Sema.cpp
@@ -22,6 +22,7 @@
 #include "clang/Sema/CXXFieldCollector.h"
 #include "clang/Sema/TemplateDeduction.h"
 #include "clang/Sema/ExternalSemaSource.h"
+#include "clang/Sema/MultiplexExternalSemaSource.h"
 #include "clang/Sema/ObjCMethodList.h"
 #include "clang/Sema/PrettyDeclStackTrace.h"
 #include "clang/Sema/Scope.h"
@@ -43,22 +44,6 @@
 using namespace clang;
 using namespace sema;
 
-FunctionScopeInfo::~FunctionScopeInfo() { }
-
-void FunctionScopeInfo::Clear() {
-  HasBranchProtectedScope = false;
-  HasBranchIntoScope = false;
-  HasIndirectGoto = false;
-  
-  SwitchStack.clear();
-  Returns.clear();
-  ErrorTrap.reset();
-  PossiblyUnreachableDiags.clear();
-}
-
-BlockScopeInfo::~BlockScopeInfo() { }
-LambdaScopeInfo::~LambdaScopeInfo() { }
-
 PrintingPolicy Sema::getPrintingPolicy(const ASTContext &Context,
                                        const Preprocessor &PP) {
   PrintingPolicy Policy = Context.getPrintingPolicy();
@@ -84,12 +69,14 @@ void Sema::ActOnTranslationUnitScope(Scope *S) {
 Sema::Sema(Preprocessor &pp, ASTContext &ctxt, ASTConsumer &consumer,
            TranslationUnitKind TUKind,
            CodeCompleteConsumer *CodeCompleter)
-  : TheTargetAttributesSema(0), FPFeatures(pp.getLangOpts()),
+  : TheTargetAttributesSema(0), ExternalSource(0), 
+    isMultiplexExternalSource(false), FPFeatures(pp.getLangOpts()),
     LangOpts(pp.getLangOpts()), PP(pp), Context(ctxt), Consumer(consumer),
     Diags(PP.getDiagnostics()), SourceMgr(PP.getSourceManager()),
-    CollectStats(false), ExternalSource(0), CodeCompleter(CodeCompleter),
+    CollectStats(false), CodeCompleter(CodeCompleter),
     CurContext(0), OriginalLexicalContext(0),
     PackContext(0), MSStructPragmaOn(false), VisContext(0),
+    IsBuildingRecoveryCallExpr(false),
     ExprNeedsCleanups(false), LateTemplateParser(0), OpaqueParser(0),
     IdResolver(pp), StdInitializerList(0), CXXTypeInfoDecl(0), MSVCGuidDecl(0),
     NSNumberDecl(0),
@@ -203,6 +190,10 @@ Sema::~Sema() {
   if (ExternalSemaSource *ExternalSema
         = dyn_cast_or_null<ExternalSemaSource>(Context.getExternalSource()))
     ExternalSema->ForgetSema();
+
+  // If Sema's ExternalSource is the multiplexer - we own it.
+  if (isMultiplexExternalSource)
+    delete ExternalSource;
 }
 
 /// makeUnavailableInSystemHeader - There is an error in the current
@@ -234,6 +225,27 @@ ASTMutationListener *Sema::getASTMutationListener() const {
   return getASTConsumer().GetASTMutationListener();
 }
 
+///\brief Registers an external source. If an external source already exists,
+/// creates a multiplex external source and appends to it.
+///
+///\param[in] E - A non-null external sema source.
+///
+void Sema::addExternalSource(ExternalSemaSource *E) {
+  assert(E && "Cannot use with NULL ptr");
+
+  if (!ExternalSource) {
+    ExternalSource = E;
+    return;
+  }
+
+  if (isMultiplexExternalSource)
+    static_cast<MultiplexExternalSemaSource*>(ExternalSource)->addSource(*E);
+  else {
+    ExternalSource = new MultiplexExternalSemaSource(*ExternalSource, *E);
+    isMultiplexExternalSource = true;
+  }
+}
+
 /// \brief Print out statistics about the semantic analysis.
 void Sema::PrintStats() const {
   llvm::errs() << "\n*** Semantic Analysis Stats:\n";
@@ -507,6 +519,11 @@ void Sema::ActOnEndOfTranslationUnit() {
   assert(DelayedDiagnostics.getCurrentPool() == NULL
          && "reached end of translation unit with a pool attached?");
 
+  // If code completion is enabled, don't perform any end-of-translation-unit
+  // work.
+  if (PP.isCodeCompletionEnabled())
+    return;
+
   // Only complete translation units define vtables and perform implicit
   // instantiations.
   if (TUKind == TU_Complete) {
@@ -648,6 +665,8 @@ void Sema::ActOnEndOfTranslationUnit() {
                                    diag::err_tentative_def_incomplete_type))
       VD->setInvalidDecl();
 
+    CheckCompleteVariableDeclaration(VD);
+
     // Notify the consumer that we've completed a tentative definition.
     if (!VD->isInvalidDecl())
       Consumer.CompleteTentativeDefinition(VD);
@@ -1021,6 +1040,9 @@ LambdaScopeInfo *Sema::getCurLambda() {
 }
 
 void Sema::ActOnComment(SourceRange Comment) {
+  if (!LangOpts.RetainCommentsFromSystemHeaders &&
+      SourceMgr.isInSystemHeader(Comment.getBegin()))
+    return;
   RawComment RC(SourceMgr, Comment);
   if (RC.isAlmostTrailingComment()) {
     SourceRange MagicMarkerRange(Comment.getBegin(),
@@ -1165,8 +1187,7 @@ static void noteOverloads(Sema &S, const UnresolvedSetImpl &Overloads,
        DeclsEnd = Overloads.end(); It != DeclsEnd; ++It) {
     // FIXME: Magic number for max shown overloads stolen from
     // OverloadCandidateSet::NoteCandidates.
-    if (ShownOverloads >= 4 &&
-        S.Diags.getShowOverloads() == DiagnosticsEngine::Ovl_Best) {
+    if (ShownOverloads >= 4 && S.Diags.getShowOverloads() == Ovl_Best) {
       ++SuppressedOverloads;
       continue;
     }
@@ -1237,8 +1258,7 @@ bool Sema::tryToRecoverWithCall(ExprResult &E, const PartialDiagnostic &PD,
     // FIXME: Try this before emitting the fixit, and suppress diagnostics
     // while doing so.
     E = ActOnCallExpr(0, E.take(), ParenInsertionLoc,
-                      MultiExprArg(*this, 0, 0),
-                      ParenInsertionLoc.getLocWithOffset(1));
+                      MultiExprArg(), ParenInsertionLoc.getLocWithOffset(1));
     return true;
   }
 
diff --git a/lib/Sema/SemaAccess.cpp b/lib/Sema/SemaAccess.cpp
index 3481171c7735..58b1a51ae573 100644
--- a/lib/Sema/SemaAccess.cpp
+++ b/lib/Sema/SemaAccess.cpp
@@ -97,14 +97,19 @@ struct EffectiveContext {
     // functions (which can gain privileges through friendship), but we
     // take that as an oversight.
     while (true) {
+      // We want to add canonical declarations to the EC lists for
+      // simplicity of checking, but we need to walk up through the
+      // actual current DC chain.  Otherwise, something like a local
+      // extern or friend which happens to be the canonical
+      // declaration will really mess us up.
+
       if (isa<CXXRecordDecl>(DC)) {
-        CXXRecordDecl *Record = cast<CXXRecordDecl>(DC)->getCanonicalDecl();
-        Records.push_back(Record);
+        CXXRecordDecl *Record = cast<CXXRecordDecl>(DC);
+        Records.push_back(Record->getCanonicalDecl());
         DC = Record->getDeclContext();
       } else if (isa<FunctionDecl>(DC)) {
-        FunctionDecl *Function = cast<FunctionDecl>(DC)->getCanonicalDecl();
-        Functions.push_back(Function);
-        
+        FunctionDecl *Function = cast<FunctionDecl>(DC);
+        Functions.push_back(Function->getCanonicalDecl());
         if (Function->getFriendObjectKind())
           DC = Function->getLexicalDeclContext();
         else
@@ -1791,7 +1796,7 @@ void Sema::CheckLookupAccess(const LookupResult &R) {
 /// specifiers into account, but no member access expressions and such.
 ///
 /// \param Decl the declaration to check if it can be accessed
-/// \param Class the class/context from which to start the search
+/// \param Ctx the class/context from which to start the search
 /// \return true if the Decl is accessible from the Class, false otherwise.
 bool Sema::IsSimplyAccessible(NamedDecl *Decl, DeclContext *Ctx) {
   if (CXXRecordDecl *Class = dyn_cast<CXXRecordDecl>(Ctx)) {
diff --git a/lib/Sema/SemaAttr.cpp b/lib/Sema/SemaAttr.cpp
index e935fc735b23..f1154c1a8aeb 100644
--- a/lib/Sema/SemaAttr.cpp
+++ b/lib/Sema/SemaAttr.cpp
@@ -136,23 +136,12 @@ void Sema::AddMsStructLayoutForRecord(RecordDecl *RD) {
 }
 
 void Sema::ActOnPragmaOptionsAlign(PragmaOptionsAlignKind Kind,
-                                   SourceLocation PragmaLoc,
-                                   SourceLocation KindLoc) {
+                                   SourceLocation PragmaLoc) {
   if (PackContext == 0)
     PackContext = new PragmaPackStack();
 
   PragmaPackStack *Context = static_cast<PragmaPackStack*>(PackContext);
 
-  // Reset just pops the top of the stack, or resets the current alignment to
-  // default.
-  if (Kind == Sema::POAK_Reset) {
-    if (!Context->pop(0, /*IsReset=*/true)) {
-      Diag(PragmaLoc, diag::warn_pragma_options_align_reset_failed)
-        << "stack empty";
-    }
-    return;
-  }
-
   switch (Kind) {
     // For all targets we support native and natural are the same.
     //
@@ -181,9 +170,13 @@ void Sema::ActOnPragmaOptionsAlign(PragmaOptionsAlignKind Kind,
     Context->setAlignment(PackStackEntry::kMac68kAlignmentSentinel);
     break;
 
-  default:
-    Diag(PragmaLoc, diag::warn_pragma_options_align_unsupported_option)
-      << KindLoc;
+  case POAK_Reset:
+    // Reset just pops the top of the stack, or resets the current alignment to
+    // default.
+    if (!Context->pop(0, /*IsReset=*/true)) {
+      Diag(PragmaLoc, diag::warn_pragma_options_align_reset_failed)
+        << "stack empty";
+    }
     break;
   }
 }
diff --git a/lib/Sema/SemaCXXScopeSpec.cpp b/lib/Sema/SemaCXXScopeSpec.cpp
index 0de9dd5f64c9..15bfd1ce6294 100644
--- a/lib/Sema/SemaCXXScopeSpec.cpp
+++ b/lib/Sema/SemaCXXScopeSpec.cpp
@@ -520,7 +520,8 @@ bool Sema::BuildCXXNestedNameSpecifier(Scope *S,
       if (LookupCtx)
         Diag(Found.getNameLoc(), diag::err_no_member_suggest)
           << Name << LookupCtx << CorrectedQuotedStr << SS.getRange()
-          << FixItHint::CreateReplacement(Found.getNameLoc(), CorrectedStr);
+          << FixItHint::CreateReplacement(Corrected.getCorrectionRange(),
+                                          CorrectedStr);
       else
         Diag(Found.getNameLoc(), diag::err_undeclared_var_use_suggest)
           << Name << CorrectedQuotedStr
diff --git a/lib/Sema/SemaCast.cpp b/lib/Sema/SemaCast.cpp
index d8d51e77ee24..bf25c6178541 100644
--- a/lib/Sema/SemaCast.cpp
+++ b/lib/Sema/SemaCast.cpp
@@ -227,7 +227,7 @@ Sema::ActOnCXXNamedCast(SourceLocation OpLoc, tok::TokenKind Kind,
     CheckExtraCXXDefaultArguments(D);
   }
 
-  return BuildCXXNamedCast(OpLoc, Kind, TInfo, move(E),
+  return BuildCXXNamedCast(OpLoc, Kind, TInfo, E,
                            SourceRange(LAngleBracketLoc, RAngleBracketLoc),
                            SourceRange(LParenLoc, RParenLoc));
 }
@@ -1331,8 +1331,7 @@ TryStaticImplicitCast(Sema &Self, ExprResult &SrcExpr, QualType DestType,
   if (InitSeq.Failed() && (CStyle || !DestType->isReferenceType()))
     return TC_NotApplicable;
     
-  ExprResult Result
-    = InitSeq.Perform(Self, Entity, InitKind, MultiExprArg(Self, &SrcExprRaw, 1));
+  ExprResult Result = InitSeq.Perform(Self, Entity, InitKind, SrcExprRaw);
   if (Result.isInvalid()) {
     msg = 0;
     return TC_Failed;
@@ -1343,7 +1342,7 @@ TryStaticImplicitCast(Sema &Self, ExprResult &SrcExpr, QualType DestType,
   else
     Kind = CK_NoOp;
   
-  SrcExpr = move(Result);
+  SrcExpr = Result;
   return TC_Success;
 }
 
@@ -1492,6 +1491,22 @@ static void DiagnoseCastOfObjCSEL(Sema &Self, const ExprResult &SrcExpr,
     }
 }
 
+static void checkIntToPointerCast(bool CStyle, SourceLocation Loc,
+                                  const Expr *SrcExpr, QualType DestType,
+                                  Sema &Self) {
+  QualType SrcType = SrcExpr->getType();
+
+  // Not warning on reinterpret_cast, boolean, constant expressions, etc
+  // are not explicit design choices, but consistent with GCC's behavior.
+  // Feel free to modify them if you've reason/evidence for an alternative.
+  if (CStyle && SrcType->isIntegralType(Self.Context)
+      && !SrcType->isBooleanType()
+      && !SrcType->isEnumeralType()
+      && !SrcExpr->isIntegerConstantExpr(Self.Context)
+      && Self.Context.getTypeSize(DestType) > Self.Context.getTypeSize(SrcType))
+    Self.Diag(Loc, diag::warn_int_to_pointer_cast) << SrcType << DestType;
+}
+
 static TryCastResult TryReinterpretCast(Sema &Self, ExprResult &SrcExpr,
                                         QualType DestType, bool CStyle,
                                         const SourceRange &OpRange,
@@ -1513,7 +1528,7 @@ static TryCastResult TryReinterpretCast(Sema &Self, ExprResult &SrcExpr,
           SingleFunctionExpr,
           Expr::getValueKindForType(DestType) == VK_RValue // Convert Fun to Ptr 
         ) && SingleFunctionExpr.isUsable()) {
-      SrcExpr = move(SingleFunctionExpr);
+      SrcExpr = SingleFunctionExpr;
       SrcType = SrcExpr.get()->getType();
     } else {
       return TC_NotApplicable;
@@ -1690,6 +1705,8 @@ static TryCastResult TryReinterpretCast(Sema &Self, ExprResult &SrcExpr,
 
   if (SrcType->isIntegralOrEnumerationType()) {
     assert(destIsPtr && "One type must be a pointer");
+    checkIntToPointerCast(CStyle, OpRange.getBegin(), SrcExpr.get(), DestType,
+                          Self);
     // C++ 5.2.10p5: A value of integral or enumeration type can be explicitly
     //   converted to a pointer.
     // C++ 5.2.10p9: [Note: ...a null pointer constant of integral type is not
@@ -1903,6 +1920,43 @@ void CastOperation::CheckCXXCStyleCast(bool FunctionalStyle,
     SrcExpr = ExprError();
 }
 
+/// DiagnoseBadFunctionCast - Warn whenever a function call is cast to a 
+///  non-matching type. Such as enum function call to int, int call to
+/// pointer; etc. Cast to 'void' is an exception.
+static void DiagnoseBadFunctionCast(Sema &Self, const ExprResult &SrcExpr,
+                                  QualType DestType) {
+  if (Self.Diags.getDiagnosticLevel(diag::warn_bad_function_cast,
+                                    SrcExpr.get()->getExprLoc()) 
+        == DiagnosticsEngine::Ignored)
+    return;
+  
+  if (!isa<CallExpr>(SrcExpr.get()))
+    return;
+  
+  QualType SrcType = SrcExpr.get()->getType();
+  if (DestType.getUnqualifiedType()->isVoidType())
+    return;
+  if ((SrcType->isAnyPointerType() || SrcType->isBlockPointerType())
+      && (DestType->isAnyPointerType() || DestType->isBlockPointerType()))
+    return;
+  if (SrcType->isIntegerType() && DestType->isIntegerType() &&
+      (SrcType->isBooleanType() == DestType->isBooleanType()) &&
+      (SrcType->isEnumeralType() == DestType->isEnumeralType()))
+    return;
+  if (SrcType->isRealFloatingType() && DestType->isRealFloatingType())
+    return;
+  if (SrcType->isEnumeralType() && DestType->isEnumeralType())
+    return;
+  if (SrcType->isComplexType() && DestType->isComplexType())
+    return;
+  if (SrcType->isComplexIntegerType() && DestType->isComplexIntegerType())
+    return;
+  
+  Self.Diag(SrcExpr.get()->getExprLoc(),
+            diag::warn_bad_function_cast)
+            << SrcType << DestType << SrcExpr.get()->getSourceRange();
+}
+
 /// Check the semantics of a C-style cast operation, in C.
 void CastOperation::CheckCStyleCast() {
   assert(!Self.getLangOpts().CPlusPlus);
@@ -2035,6 +2089,8 @@ void CastOperation::CheckCStyleCast() {
       SrcExpr = ExprError();
       return;
     }
+    checkIntToPointerCast(/* CStyle */ true, OpRange.getBegin(), SrcExpr.get(),
+                          DestType, Self);
   } else if (!SrcType->isArithmeticType()) {
     if (!DestType->isIntegralType(Self.Context) &&
         DestType->isArithmeticType()) {
@@ -2076,7 +2132,7 @@ void CastOperation::CheckCStyleCast() {
     }
   }
   DiagnoseCastOfObjCSEL(Self, SrcExpr, DestType);
-  
+  DiagnoseBadFunctionCast(Self, SrcExpr, DestType);
   Kind = Self.PrepareScalarCast(SrcExpr, DestType);
   if (SrcExpr.isInvalid())
     return;
diff --git a/lib/Sema/SemaChecking.cpp b/lib/Sema/SemaChecking.cpp
index 2559f00f71e0..692a210ef304 100644
--- a/lib/Sema/SemaChecking.cpp
+++ b/lib/Sema/SemaChecking.cpp
@@ -266,11 +266,11 @@ Sema::CheckBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall) {
   case Builtin::BI__sync_swap_4:
   case Builtin::BI__sync_swap_8:
   case Builtin::BI__sync_swap_16:
-    return SemaBuiltinAtomicOverloaded(move(TheCallResult));
+    return SemaBuiltinAtomicOverloaded(TheCallResult);
 #define BUILTIN(ID, TYPE, ATTRS)
 #define ATOMIC_BUILTIN(ID, TYPE, ATTRS) \
   case Builtin::BI##ID: \
-    return SemaAtomicOpsOverloaded(move(TheCallResult), AtomicExpr::AO##ID);
+    return SemaAtomicOpsOverloaded(TheCallResult, AtomicExpr::AO##ID);
 #include "clang/Basic/Builtins.def"
   case Builtin::BI__builtin_annotation:
     if (SemaBuiltinAnnotation(*this, TheCall))
@@ -299,7 +299,7 @@ Sema::CheckBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall) {
     }
   }
 
-  return move(TheCallResult);
+  return TheCallResult;
 }
 
 // Get the valid immediate range for the specified NEON type code.
@@ -437,6 +437,11 @@ bool Sema::CheckMipsBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall) {
   default: return false;
   case Mips::BI__builtin_mips_wrdsp: i = 1; l = 0; u = 63; break;
   case Mips::BI__builtin_mips_rddsp: i = 0; l = 0; u = 63; break;
+  case Mips::BI__builtin_mips_append: i = 2; l = 0; u = 31; break;
+  case Mips::BI__builtin_mips_balign: i = 2; l = 0; u = 3; break;
+  case Mips::BI__builtin_mips_precr_sra_ph_w: i = 2; l = 0; u = 31; break;
+  case Mips::BI__builtin_mips_precr_sra_r_ph_w: i = 2; l = 0; u = 31; break;
+  case Mips::BI__builtin_mips_prepend: i = 2; l = 0; u = 31; break;
   };
 
   // We can't check the value of a dependent argument.
@@ -490,9 +495,8 @@ void Sema::checkCall(NamedDecl *FDecl, Expr **Args,
                      SourceLocation Loc,
                      SourceRange Range,
                      VariadicCallType CallType) {
-  // FIXME: This mechanism should be abstracted to be less fragile and
-  // more efficient. For example, just map function ids to custom
-  // handlers.
+  if (CurContext->isDependentContext())
+    return;
 
   // Printf and scanf checking.
   bool HandledFormatString = false;
@@ -506,8 +510,11 @@ void Sema::checkCall(NamedDecl *FDecl, Expr **Args,
   // Refuse POD arguments that weren't caught by the format string
   // checks above.
   if (!HandledFormatString && CallType != VariadicDoesNotApply)
-    for (unsigned ArgIdx = NumProtoArgs; ArgIdx < NumArgs; ++ArgIdx)
-      variadicArgumentPODCheck(Args[ArgIdx], CallType);
+    for (unsigned ArgIdx = NumProtoArgs; ArgIdx < NumArgs; ++ArgIdx) {
+      // Args[ArgIdx] can be null in malformed code.
+      if (Expr *Arg = Args[ArgIdx])
+        variadicArgumentPODCheck(Arg, CallType);
+    }
 
   for (specific_attr_iterator<NonNullAttr>
          I = FDecl->specific_attr_begin<NonNullAttr>(),
@@ -538,11 +545,23 @@ void Sema::CheckConstructorCall(FunctionDecl *FDecl, Expr **Args,
 /// and safety properties not strictly enforced by the C type system.
 bool Sema::CheckFunctionCall(FunctionDecl *FDecl, CallExpr *TheCall,
                              const FunctionProtoType *Proto) {
-  bool IsMemberFunction = isa<CXXMemberCallExpr>(TheCall);
+  bool IsMemberOperatorCall = isa<CXXOperatorCallExpr>(TheCall) &&
+                              isa<CXXMethodDecl>(FDecl);
+  bool IsMemberFunction = isa<CXXMemberCallExpr>(TheCall) ||
+                          IsMemberOperatorCall;
   VariadicCallType CallType = getVariadicCallType(FDecl, Proto,
                                                   TheCall->getCallee());
   unsigned NumProtoArgs = Proto ? Proto->getNumArgs() : 0;
-  checkCall(FDecl, TheCall->getArgs(), TheCall->getNumArgs(), NumProtoArgs,
+  Expr** Args = TheCall->getArgs();
+  unsigned NumArgs = TheCall->getNumArgs();
+  if (IsMemberOperatorCall) {
+    // If this is a call to a member operator, hide the first argument
+    // from checkCall.
+    // FIXME: Our choice of AST representation here is less than ideal.
+    ++Args;
+    --NumArgs;
+  }
+  checkCall(FDecl, Args, NumArgs, NumProtoArgs,
             IsMemberFunction, TheCall->getRParenLoc(),
             TheCall->getCallee()->getSourceRange(), CallType);
 
@@ -737,6 +756,11 @@ ExprResult Sema::SemaAtomicOpsOverloaded(ExprResult TheCallResult,
         << Ptr->getType() << Ptr->getSourceRange();
       return ExprError();
     }
+    if (AtomTy.isConstQualified()) {
+      Diag(DRE->getLocStart(), diag::err_atomic_op_needs_non_const_atomic)
+        << Ptr->getType() << Ptr->getSourceRange();
+      return ExprError();
+    }
     ValType = AtomTy->getAs<AtomicType>()->getValueType();
   }
 
@@ -885,8 +909,7 @@ ExprResult Sema::SemaAtomicOpsOverloaded(ExprResult TheCallResult,
   }
 
   return Owned(new (Context) AtomicExpr(TheCall->getCallee()->getLocStart(),
-                                        SubExprs.data(), SubExprs.size(),
-                                        ResultType, Op,
+                                        SubExprs, ResultType, Op,
                                         TheCall->getRParenLoc()));
 }
 
@@ -1189,10 +1212,19 @@ Sema::SemaBuiltinAtomicOverloaded(ExprResult TheCallResult) {
   // concrete integer type we should convert to is.
   unsigned NewBuiltinID = BuiltinIndices[BuiltinIndex][SizeIndex];
   const char *NewBuiltinName = Context.BuiltinInfo.GetName(NewBuiltinID);
-  IdentifierInfo *NewBuiltinII = PP.getIdentifierInfo(NewBuiltinName);
-  FunctionDecl *NewBuiltinDecl =
-    cast<FunctionDecl>(LazilyCreateBuiltin(NewBuiltinII, NewBuiltinID,
-                                           TUScope, false, DRE->getLocStart()));
+  FunctionDecl *NewBuiltinDecl;
+  if (NewBuiltinID == BuiltinID)
+    NewBuiltinDecl = FDecl;
+  else {
+    // Perform builtin lookup to avoid redeclaring it.
+    DeclarationName DN(&Context.Idents.get(NewBuiltinName));
+    LookupResult Res(*this, DN, DRE->getLocStart(), LookupOrdinaryName);
+    LookupName(Res, TUScope, /*AllowBuiltinCreation=*/true);
+    assert(Res.getFoundDecl());
+    NewBuiltinDecl = dyn_cast<FunctionDecl>(Res.getFoundDecl());
+    if (NewBuiltinDecl == 0)
+      return ExprError();
+  }
 
   // The first argument --- the pointer --- has a fixed type; we
   // deduce the types of the rest of the arguments accordingly.  Walk
@@ -1228,14 +1260,14 @@ Sema::SemaBuiltinAtomicOverloaded(ExprResult TheCallResult) {
       NewBuiltinDecl,
       /*enclosing*/ false,
       DRE->getLocation(),
-      NewBuiltinDecl->getType(),
+      Context.BuiltinFnTy,
       DRE->getValueKind());
 
   // Set the callee in the CallExpr.
-  // FIXME: This leaks the original parens and implicit casts.
-  ExprResult PromotedCall = UsualUnaryConversions(NewDRE);
-  if (PromotedCall.isInvalid())
-    return ExprError();
+  // FIXME: This loses syntactic information.
+  QualType CalleePtrTy = Context.getPointerType(NewBuiltinDecl->getType());
+  ExprResult PromotedCall = ImpCastExprToType(NewDRE, CalleePtrTy,
+                                              CK_BuiltinFnToFnPtr);
   TheCall->setCallee(PromotedCall.take());
 
   // Change the result type of the call to match the original value type. This
@@ -1243,7 +1275,7 @@ Sema::SemaBuiltinAtomicOverloaded(ExprResult TheCallResult) {
   // gracefully.
   TheCall->setType(ResultType);
 
-  return move(TheCallResult);
+  return TheCallResult;
 }
 
 /// CheckObjCString - Checks that the argument to the builtin
@@ -1264,7 +1296,7 @@ bool Sema::CheckObjCString(Expr *Arg) {
     StringRef String = Literal->getString();
     unsigned NumBytes = String.size();
     SmallVector<UTF16, 128> ToBuf(NumBytes);
-    const UTF8 *FromPtr = (UTF8 *)String.data();
+    const UTF8 *FromPtr = (const UTF8 *)String.data();
     UTF16 *ToPtr = &ToBuf[0];
     
     ConversionResult Result = ConvertUTF8toUTF16(&FromPtr, FromPtr + NumBytes,
@@ -1503,8 +1535,7 @@ ExprResult Sema::SemaBuiltinShuffleVector(CallExpr *TheCall) {
     TheCall->setArg(i, 0);
   }
 
-  return Owned(new (Context) ShuffleVectorExpr(Context, exprs.begin(),
-                                            exprs.size(), resType,
+  return Owned(new (Context) ShuffleVectorExpr(Context, exprs, resType,
                                             TheCall->getCallee()->getLocStart(),
                                             TheCall->getRParenLoc()));
 }
@@ -1935,19 +1966,19 @@ public:
   void HandleIncompleteSpecifier(const char *startSpecifier,
                                  unsigned specifierLen);
 
+  void HandleInvalidLengthModifier(
+      const analyze_format_string::FormatSpecifier &FS,
+      const analyze_format_string::ConversionSpecifier &CS,
+      const char *startSpecifier, unsigned specifierLen, unsigned DiagID);
+
   void HandleNonStandardLengthModifier(
-      const analyze_format_string::LengthModifier &LM,
+      const analyze_format_string::FormatSpecifier &FS,
       const char *startSpecifier, unsigned specifierLen);
 
   void HandleNonStandardConversionSpecifier(
       const analyze_format_string::ConversionSpecifier &CS,
       const char *startSpecifier, unsigned specifierLen);
 
-  void HandleNonStandardConversionSpecification(
-      const analyze_format_string::LengthModifier &LM,
-      const analyze_format_string::ConversionSpecifier &CS,
-      const char *startSpecifier, unsigned specifierLen);
-
   virtual void HandlePosition(const char *startPos, unsigned posLen);
 
   virtual void HandleInvalidPosition(const char *startSpecifier,
@@ -1964,7 +1995,7 @@ public:
                                    PartialDiagnostic PDiag,
                                    SourceLocation StringLoc,
                                    bool IsStringLocation, Range StringRange,
-                                   FixItHint Fixit = FixItHint());
+                            ArrayRef<FixItHint> Fixit = ArrayRef<FixItHint>());
 
 protected:
   bool HandleInvalidConversionSpecifier(unsigned argIndex, SourceLocation Loc,
@@ -1991,7 +2022,7 @@ protected:
   template <typename Range>
   void EmitFormatDiagnostic(PartialDiagnostic PDiag, SourceLocation StringLoc,
                             bool IsStringLocation, Range StringRange,
-                            FixItHint Fixit = FixItHint());
+                            ArrayRef<FixItHint> Fixit = ArrayRef<FixItHint>());
 
   void CheckPositionalAndNonpositionalArgs(
       const analyze_format_string::FormatSpecifier *FS);
@@ -2025,35 +2056,95 @@ void CheckFormatHandler::HandleIncompleteSpecifier(const char *startSpecifier,
                        getSpecifierRange(startSpecifier, specifierLen));
 }
 
+void CheckFormatHandler::HandleInvalidLengthModifier(
+    const analyze_format_string::FormatSpecifier &FS,
+    const analyze_format_string::ConversionSpecifier &CS,
+    const char *startSpecifier, unsigned specifierLen, unsigned DiagID) {
+  using namespace analyze_format_string;
+
+  const LengthModifier &LM = FS.getLengthModifier();
+  CharSourceRange LMRange = getSpecifierRange(LM.getStart(), LM.getLength());
+
+  // See if we know how to fix this length modifier.
+  llvm::Optional<LengthModifier> FixedLM = FS.getCorrectedLengthModifier();
+  if (FixedLM) {
+    EmitFormatDiagnostic(S.PDiag(DiagID) << LM.toString() << CS.toString(),
+                         getLocationOfByte(LM.getStart()),
+                         /*IsStringLocation*/true,
+                         getSpecifierRange(startSpecifier, specifierLen));
+
+    S.Diag(getLocationOfByte(LM.getStart()), diag::note_format_fix_specifier)
+      << FixedLM->toString()
+      << FixItHint::CreateReplacement(LMRange, FixedLM->toString());
+
+  } else {
+    FixItHint Hint;
+    if (DiagID == diag::warn_format_nonsensical_length)
+      Hint = FixItHint::CreateRemoval(LMRange);
+
+    EmitFormatDiagnostic(S.PDiag(DiagID) << LM.toString() << CS.toString(),
+                         getLocationOfByte(LM.getStart()),
+                         /*IsStringLocation*/true,
+                         getSpecifierRange(startSpecifier, specifierLen),
+                         Hint);
+  }
+}
+
 void CheckFormatHandler::HandleNonStandardLengthModifier(
-    const analyze_format_string::LengthModifier &LM,
+    const analyze_format_string::FormatSpecifier &FS,
     const char *startSpecifier, unsigned specifierLen) {
-  EmitFormatDiagnostic(S.PDiag(diag::warn_format_non_standard) << LM.toString()
-                       << 0,
-                       getLocationOfByte(LM.getStart()),
-                       /*IsStringLocation*/true,
-                       getSpecifierRange(startSpecifier, specifierLen));
+  using namespace analyze_format_string;
+
+  const LengthModifier &LM = FS.getLengthModifier();
+  CharSourceRange LMRange = getSpecifierRange(LM.getStart(), LM.getLength());
+
+  // See if we know how to fix this length modifier.
+  llvm::Optional<LengthModifier> FixedLM = FS.getCorrectedLengthModifier();
+  if (FixedLM) {
+    EmitFormatDiagnostic(S.PDiag(diag::warn_format_non_standard)
+                           << LM.toString() << 0,
+                         getLocationOfByte(LM.getStart()),
+                         /*IsStringLocation*/true,
+                         getSpecifierRange(startSpecifier, specifierLen));
+
+    S.Diag(getLocationOfByte(LM.getStart()), diag::note_format_fix_specifier)
+      << FixedLM->toString()
+      << FixItHint::CreateReplacement(LMRange, FixedLM->toString());
+
+  } else {
+    EmitFormatDiagnostic(S.PDiag(diag::warn_format_non_standard)
+                           << LM.toString() << 0,
+                         getLocationOfByte(LM.getStart()),
+                         /*IsStringLocation*/true,
+                         getSpecifierRange(startSpecifier, specifierLen));
+  }
 }
 
 void CheckFormatHandler::HandleNonStandardConversionSpecifier(
     const analyze_format_string::ConversionSpecifier &CS,
     const char *startSpecifier, unsigned specifierLen) {
-  EmitFormatDiagnostic(S.PDiag(diag::warn_format_non_standard) << CS.toString()
-                       << 1,
-                       getLocationOfByte(CS.getStart()),
-                       /*IsStringLocation*/true,
-                       getSpecifierRange(startSpecifier, specifierLen));
-}
+  using namespace analyze_format_string;
 
-void CheckFormatHandler::HandleNonStandardConversionSpecification(
-    const analyze_format_string::LengthModifier &LM,
-    const analyze_format_string::ConversionSpecifier &CS,
-    const char *startSpecifier, unsigned specifierLen) {
-  EmitFormatDiagnostic(S.PDiag(diag::warn_format_non_standard_conversion_spec)
-                       << LM.toString() << CS.toString(),
-                       getLocationOfByte(LM.getStart()),
-                       /*IsStringLocation*/true,
-                       getSpecifierRange(startSpecifier, specifierLen));
+  // See if we know how to fix this conversion specifier.
+  llvm::Optional<ConversionSpecifier> FixedCS = CS.getStandardSpecifier();
+  if (FixedCS) {
+    EmitFormatDiagnostic(S.PDiag(diag::warn_format_non_standard)
+                          << CS.toString() << /*conversion specifier*/1,
+                         getLocationOfByte(CS.getStart()),
+                         /*IsStringLocation*/true,
+                         getSpecifierRange(startSpecifier, specifierLen));
+
+    CharSourceRange CSRange = getSpecifierRange(CS.getStart(), CS.getLength());
+    S.Diag(getLocationOfByte(CS.getStart()), diag::note_format_fix_specifier)
+      << FixedCS->toString()
+      << FixItHint::CreateReplacement(CSRange, FixedCS->toString());
+  } else {
+    EmitFormatDiagnostic(S.PDiag(diag::warn_format_non_standard)
+                          << CS.toString() << /*conversion specifier*/1,
+                         getLocationOfByte(CS.getStart()),
+                         /*IsStringLocation*/true,
+                         getSpecifierRange(startSpecifier, specifierLen));
+  }
 }
 
 void CheckFormatHandler::HandlePosition(const char *startPos,
@@ -2182,7 +2273,7 @@ void CheckFormatHandler::EmitFormatDiagnostic(PartialDiagnostic PDiag,
                                               SourceLocation Loc,
                                               bool IsStringLocation,
                                               Range StringRange,
-                                              FixItHint FixIt) {
+                                              ArrayRef<FixItHint> FixIt) {
   EmitFormatDiagnostic(S, inFunctionCall, Args[FormatIdx], PDiag,
                        Loc, IsStringLocation, StringRange, FixIt);
 }
@@ -2190,7 +2281,7 @@ void CheckFormatHandler::EmitFormatDiagnostic(PartialDiagnostic PDiag,
 /// \brief If the format string is not within the funcion call, emit a note
 /// so that the function call and string are in diagnostic messages.
 ///
-/// \param inFunctionCall if true, the format string is within the function
+/// \param InFunctionCall if true, the format string is within the function
 /// call and only one diagnostic message will be produced.  Otherwise, an
 /// extra note will be emitted pointing to location of the format string.
 ///
@@ -2213,7 +2304,7 @@ void CheckFormatHandler::EmitFormatDiagnostic(PartialDiagnostic PDiag,
 /// \param StringRange some or all of the string to highlight.  This is
 /// templated so it can accept either a CharSourceRange or a SourceRange.
 ///
-/// \param Fixit optional fix it hint for the format string.
+/// \param FixIt optional fix it hint for the format string.
 template<typename Range>
 void CheckFormatHandler::EmitFormatDiagnostic(Sema &S, bool InFunctionCall,
                                               const Expr *ArgumentExpr,
@@ -2221,15 +2312,27 @@ void CheckFormatHandler::EmitFormatDiagnostic(Sema &S, bool InFunctionCall,
                                               SourceLocation Loc,
                                               bool IsStringLocation,
                                               Range StringRange,
-                                              FixItHint FixIt) {
-  if (InFunctionCall)
-    S.Diag(Loc, PDiag) << StringRange << FixIt;
-  else {
+                                              ArrayRef<FixItHint> FixIt) {
+  if (InFunctionCall) {
+    const Sema::SemaDiagnosticBuilder &D = S.Diag(Loc, PDiag);
+    D << StringRange;
+    for (ArrayRef<FixItHint>::iterator I = FixIt.begin(), E = FixIt.end();
+         I != E; ++I) {
+      D << *I;
+    }
+  } else {
     S.Diag(IsStringLocation ? ArgumentExpr->getExprLoc() : Loc, PDiag)
       << ArgumentExpr->getSourceRange();
-    S.Diag(IsStringLocation ? Loc : StringRange.getBegin(),
-           diag::note_format_string_defined)
-      << StringRange << FixIt;
+
+    const Sema::SemaDiagnosticBuilder &Note =
+      S.Diag(IsStringLocation ? Loc : StringRange.getBegin(),
+             diag::note_format_string_defined);
+
+    Note << StringRange;
+    for (ArrayRef<FixItHint>::iterator I = FixIt.begin(), E = FixIt.end();
+         I != E; ++I) {
+      Note << *I;
+    }
   }
 }
 
@@ -2550,23 +2653,17 @@ CheckPrintfHandler::HandlePrintfSpecifier(const analyze_printf::PrintfSpecifier
             startSpecifier, specifierLen);
 
   // Check the length modifier is valid with the given conversion specifier.
-  const LengthModifier &LM = FS.getLengthModifier();
-  if (!FS.hasValidLengthModifier())
-    EmitFormatDiagnostic(S.PDiag(diag::warn_format_nonsensical_length)
-                           << LM.toString() << CS.toString(),
-                         getLocationOfByte(LM.getStart()),
-                         /*IsStringLocation*/true,
-                         getSpecifierRange(startSpecifier, specifierLen),
-                         FixItHint::CreateRemoval(
-                           getSpecifierRange(LM.getStart(),
-                                             LM.getLength())));
-  if (!FS.hasStandardLengthModifier())
-    HandleNonStandardLengthModifier(LM, startSpecifier, specifierLen);
+  if (!FS.hasValidLengthModifier(S.getASTContext().getTargetInfo()))
+    HandleInvalidLengthModifier(FS, CS, startSpecifier, specifierLen,
+                                diag::warn_format_nonsensical_length);
+  else if (!FS.hasStandardLengthModifier())
+    HandleNonStandardLengthModifier(FS, startSpecifier, specifierLen);
+  else if (!FS.hasStandardLengthConversionCombination())
+    HandleInvalidLengthModifier(FS, CS, startSpecifier, specifierLen,
+                                diag::warn_format_non_standard_conversion_spec);
+
   if (!FS.hasStandardConversionSpecifier(S.getLangOpts()))
     HandleNonStandardConversionSpecifier(CS, startSpecifier, specifierLen);
-  if (!FS.hasStandardLengthConversionCombination())
-    HandleNonStandardConversionSpecification(LM, CS, startSpecifier,
-                                             specifierLen);
 
   // The remaining checks depend on the data arguments.
   if (HasVAListArg)
@@ -2582,6 +2679,30 @@ CheckPrintfHandler::HandlePrintfSpecifier(const analyze_printf::PrintfSpecifier
   return checkFormatExpr(FS, startSpecifier, specifierLen, Arg);
 }
 
+static bool requiresParensToAddCast(const Expr *E) {
+  // FIXME: We should have a general way to reason about operator
+  // precedence and whether parens are actually needed here.
+  // Take care of a few common cases where they aren't.
+  const Expr *Inside = E->IgnoreImpCasts();
+  if (const PseudoObjectExpr *POE = dyn_cast<PseudoObjectExpr>(Inside))
+    Inside = POE->getSyntacticForm()->IgnoreImpCasts();
+
+  switch (Inside->getStmtClass()) {
+  case Stmt::ArraySubscriptExprClass:
+  case Stmt::CallExprClass:
+  case Stmt::DeclRefExprClass:
+  case Stmt::MemberExprClass:
+  case Stmt::ObjCIvarRefExprClass:
+  case Stmt::ObjCMessageExprClass:
+  case Stmt::ObjCPropertyRefExprClass:
+  case Stmt::ParenExprClass:
+  case Stmt::UnaryOperatorClass:
+    return false;
+  default:
+    return true;
+  }
+}
+
 bool
 CheckPrintfHandler::checkFormatExpr(const analyze_printf::PrintfSpecifier &FS,
                                     const char *StartSpecifier,
@@ -2593,81 +2714,151 @@ CheckPrintfHandler::checkFormatExpr(const analyze_printf::PrintfSpecifier &FS,
   // format specifier.
   const analyze_printf::ArgType &AT = FS.getArgType(S.Context,
                                                     ObjCContext);
-  if (AT.isValid() && !AT.matchesType(S.Context, E->getType())) {
-    // Look through argument promotions for our error message's reported type.
-    // This includes the integral and floating promotions, but excludes array
-    // and function pointer decay; seeing that an argument intended to be a
-    // string has type 'char [6]' is probably more confusing than 'char *'.
-    if (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) {
-      if (ICE->getCastKind() == CK_IntegralCast ||
-          ICE->getCastKind() == CK_FloatingCast) {
-        E = ICE->getSubExpr();
-
-        // Check if we didn't match because of an implicit cast from a 'char'
-        // or 'short' to an 'int'.  This is done because printf is a varargs
-        // function.
-        if (ICE->getType() == S.Context.IntTy ||
-            ICE->getType() == S.Context.UnsignedIntTy) {
-          // All further checking is done on the subexpression.
-          if (AT.matchesType(S.Context, E->getType()))
-            return true;
-        }
+  if (!AT.isValid())
+    return true;
+
+  QualType IntendedTy = E->getType();
+  if (AT.matchesType(S.Context, IntendedTy))
+    return true;
+
+  // Look through argument promotions for our error message's reported type.
+  // This includes the integral and floating promotions, but excludes array
+  // and function pointer decay; seeing that an argument intended to be a
+  // string has type 'char [6]' is probably more confusing than 'char *'.
+  if (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) {
+    if (ICE->getCastKind() == CK_IntegralCast ||
+        ICE->getCastKind() == CK_FloatingCast) {
+      E = ICE->getSubExpr();
+      IntendedTy = E->getType();
+
+      // Check if we didn't match because of an implicit cast from a 'char'
+      // or 'short' to an 'int'.  This is done because printf is a varargs
+      // function.
+      if (ICE->getType() == S.Context.IntTy ||
+          ICE->getType() == S.Context.UnsignedIntTy) {
+        // All further checking is done on the subexpression.
+        if (AT.matchesType(S.Context, IntendedTy))
+          return true;
       }
     }
+  }
 
-    // We may be able to offer a FixItHint if it is a supported type.
-    PrintfSpecifier fixedFS = FS;
-    bool success = fixedFS.fixType(E->getType(), S.getLangOpts(),
-                                   S.Context, ObjCContext);
+  if (S.Context.getTargetInfo().getTriple().isOSDarwin()) {
+    // Special-case some of Darwin's platform-independence types.
+    if (const TypedefType *UserTy = IntendedTy->getAs<TypedefType>()) {
+      StringRef Name = UserTy->getDecl()->getName();
+      IntendedTy = llvm::StringSwitch<QualType>(Name)
+        .Case("NSInteger", S.Context.LongTy)
+        .Case("NSUInteger", S.Context.UnsignedLongTy)
+        .Case("SInt32", S.Context.IntTy)
+        .Case("UInt32", S.Context.UnsignedIntTy)
+        .Default(IntendedTy);
+    }
+  }
 
-    if (success) {
-      // Get the fix string from the fixed format specifier
-      SmallString<16> buf;
-      llvm::raw_svector_ostream os(buf);
-      fixedFS.toString(os);
+  // We may be able to offer a FixItHint if it is a supported type.
+  PrintfSpecifier fixedFS = FS;
+  bool success = fixedFS.fixType(IntendedTy, S.getLangOpts(),
+                                 S.Context, ObjCContext);
+
+  if (success) {
+    // Get the fix string from the fixed format specifier
+    SmallString<16> buf;
+    llvm::raw_svector_ostream os(buf);
+    fixedFS.toString(os);
+
+    CharSourceRange SpecRange = getSpecifierRange(StartSpecifier, SpecifierLen);
+
+    if (IntendedTy != E->getType()) {
+      // The canonical type for formatting this value is different from the
+      // actual type of the expression. (This occurs, for example, with Darwin's
+      // NSInteger on 32-bit platforms, where it is typedef'd as 'int', but
+      // should be printed as 'long' for 64-bit compatibility.)
+      // Rather than emitting a normal format/argument mismatch, we want to
+      // add a cast to the recommended type (and correct the format string
+      // if necessary).
+      SmallString<16> CastBuf;
+      llvm::raw_svector_ostream CastFix(CastBuf);
+      CastFix << "(";
+      IntendedTy.print(CastFix, S.Context.getPrintingPolicy());
+      CastFix << ")";
+
+      SmallVector<FixItHint,4> Hints;
+      if (!AT.matchesType(S.Context, IntendedTy))
+        Hints.push_back(FixItHint::CreateReplacement(SpecRange, os.str()));
+
+      if (const CStyleCastExpr *CCast = dyn_cast<CStyleCastExpr>(E)) {
+        // If there's already a cast present, just replace it.
+        SourceRange CastRange(CCast->getLParenLoc(), CCast->getRParenLoc());
+        Hints.push_back(FixItHint::CreateReplacement(CastRange, CastFix.str()));
+
+      } else if (!requiresParensToAddCast(E)) {
+        // If the expression has high enough precedence,
+        // just write the C-style cast.
+        Hints.push_back(FixItHint::CreateInsertion(E->getLocStart(),
+                                                   CastFix.str()));
+      } else {
+        // Otherwise, add parens around the expression as well as the cast.
+        CastFix << "(";
+        Hints.push_back(FixItHint::CreateInsertion(E->getLocStart(),
+                                                   CastFix.str()));
+
+        SourceLocation After = S.PP.getLocForEndOfToken(E->getLocEnd());
+        Hints.push_back(FixItHint::CreateInsertion(After, ")"));
+      }
 
+      // We extract the name from the typedef because we don't want to show
+      // the underlying type in the diagnostic.
+      const TypedefType *UserTy = cast<TypedefType>(E->getType());
+      StringRef Name = UserTy->getDecl()->getName();
+
+      // Finally, emit the diagnostic.
+      EmitFormatDiagnostic(S.PDiag(diag::warn_format_argument_needs_cast)
+                             << Name << IntendedTy
+                             << E->getSourceRange(),
+                           E->getLocStart(), /*IsStringLocation=*/false,
+                           SpecRange, Hints);
+    } else {
       EmitFormatDiagnostic(
         S.PDiag(diag::warn_printf_conversion_argument_type_mismatch)
-          << AT.getRepresentativeTypeName(S.Context) << E->getType()
+          << AT.getRepresentativeTypeName(S.Context) << IntendedTy
           << E->getSourceRange(),
         E->getLocStart(),
         /*IsStringLocation*/false,
-        getSpecifierRange(StartSpecifier, SpecifierLen),
-        FixItHint::CreateReplacement(
-          getSpecifierRange(StartSpecifier, SpecifierLen),
-          os.str()));
-    } else {
-      const CharSourceRange &CSR = getSpecifierRange(StartSpecifier,
-                                                     SpecifierLen);
-      // Since the warning for passing non-POD types to variadic functions
-      // was deferred until now, we emit a warning for non-POD
-      // arguments here.
-      if (S.isValidVarArgType(E->getType()) == Sema::VAK_Invalid) {
-        unsigned DiagKind;
-        if (E->getType()->isObjCObjectType())
-          DiagKind = diag::err_cannot_pass_objc_interface_to_vararg_format;
-        else
-          DiagKind = diag::warn_non_pod_vararg_with_format_string;
-
-        EmitFormatDiagnostic(
-          S.PDiag(DiagKind)
-            << S.getLangOpts().CPlusPlus0x
-            << E->getType()
-            << CallType
-            << AT.getRepresentativeTypeName(S.Context)
-            << CSR
-            << E->getSourceRange(),
-          E->getLocStart(), /*IsStringLocation*/false, CSR);
-
-        checkForCStrMembers(AT, E, CSR);
-      } else
-        EmitFormatDiagnostic(
-          S.PDiag(diag::warn_printf_conversion_argument_type_mismatch)
-            << AT.getRepresentativeTypeName(S.Context) << E->getType()
-            << CSR
-            << E->getSourceRange(),
-          E->getLocStart(), /*IsStringLocation*/false, CSR);
+        SpecRange,
+        FixItHint::CreateReplacement(SpecRange, os.str()));
     }
+  } else {
+    const CharSourceRange &CSR = getSpecifierRange(StartSpecifier,
+                                                   SpecifierLen);
+    // Since the warning for passing non-POD types to variadic functions
+    // was deferred until now, we emit a warning for non-POD
+    // arguments here.
+    if (S.isValidVarArgType(E->getType()) == Sema::VAK_Invalid) {
+      unsigned DiagKind;
+      if (E->getType()->isObjCObjectType())
+        DiagKind = diag::err_cannot_pass_objc_interface_to_vararg_format;
+      else
+        DiagKind = diag::warn_non_pod_vararg_with_format_string;
+
+      EmitFormatDiagnostic(
+        S.PDiag(DiagKind)
+          << S.getLangOpts().CPlusPlus0x
+          << E->getType()
+          << CallType
+          << AT.getRepresentativeTypeName(S.Context)
+          << CSR
+          << E->getSourceRange(),
+        E->getLocStart(), /*IsStringLocation*/false, CSR);
+
+      checkForCStrMembers(AT, E, CSR);
+    } else
+      EmitFormatDiagnostic(
+        S.PDiag(diag::warn_printf_conversion_argument_type_mismatch)
+          << AT.getRepresentativeTypeName(S.Context) << E->getType()
+          << CSR
+          << E->getSourceRange(),
+        E->getLocStart(), /*IsStringLocation*/false, CSR);
   }
 
   return true;
@@ -2776,24 +2967,17 @@ bool CheckScanfHandler::HandleScanfSpecifier(
   }
   
   // Check the length modifier is valid with the given conversion specifier.
-  const LengthModifier &LM = FS.getLengthModifier();
-  if (!FS.hasValidLengthModifier()) {
-    const CharSourceRange &R = getSpecifierRange(LM.getStart(), LM.getLength());
-    EmitFormatDiagnostic(S.PDiag(diag::warn_format_nonsensical_length)
-                         << LM.toString() << CS.toString()
-                         << getSpecifierRange(startSpecifier, specifierLen),
-                         getLocationOfByte(LM.getStart()),
-                         /*IsStringLocation*/true, R,
-                         FixItHint::CreateRemoval(R));
-  }
+  if (!FS.hasValidLengthModifier(S.getASTContext().getTargetInfo()))
+    HandleInvalidLengthModifier(FS, CS, startSpecifier, specifierLen,
+                                diag::warn_format_nonsensical_length);
+  else if (!FS.hasStandardLengthModifier())
+    HandleNonStandardLengthModifier(FS, startSpecifier, specifierLen);
+  else if (!FS.hasStandardLengthConversionCombination())
+    HandleInvalidLengthModifier(FS, CS, startSpecifier, specifierLen,
+                                diag::warn_format_non_standard_conversion_spec);
 
-  if (!FS.hasStandardLengthModifier())
-    HandleNonStandardLengthModifier(LM, startSpecifier, specifierLen);
   if (!FS.hasStandardConversionSpecifier(S.getLangOpts()))
     HandleNonStandardConversionSpecifier(CS, startSpecifier, specifierLen);
-  if (!FS.hasStandardLengthConversionCombination())
-    HandleNonStandardConversionSpecification(LM, CS, startSpecifier,
-                                             specifierLen);
 
   // The remaining checks depend on the data arguments.
   if (HasVAListArg)
@@ -2881,7 +3065,8 @@ void Sema::CheckFormatString(const StringLiteral *FExpr,
                          inFunctionCall, CallType);
   
     if (!analyze_format_string::ParsePrintfString(H, Str, Str + StrLen,
-                                                  getLangOpts()))
+                                                  getLangOpts(),
+                                                  Context.getTargetInfo()))
       H.DoneProcessing();
   } else if (Type == FST_Scanf) {
     CheckScanfHandler H(*this, FExpr, OrigFormatExpr, firstDataArg, numDataArgs,
@@ -2889,7 +3074,8 @@ void Sema::CheckFormatString(const StringLiteral *FExpr,
                         inFunctionCall, CallType);
     
     if (!analyze_format_string::ParseScanfString(H, Str, Str + StrLen,
-                                                 getLangOpts()))
+                                                 getLangOpts(),
+                                                 Context.getTargetInfo()))
       H.DoneProcessing();
   } // TODO: handle other formats
 }
@@ -4138,6 +4324,44 @@ static void CheckTrivialUnsignedComparison(Sema &S, BinaryOperator *E) {
   }
 }
 
+static void DiagnoseOutOfRangeComparison(Sema &S, BinaryOperator *E,
+                                         Expr *Constant, Expr *Other,
+                                         llvm::APSInt Value,
+                                         bool RhsConstant) {
+  BinaryOperatorKind op = E->getOpcode();
+  QualType OtherT = Other->getType();
+  QualType ConstantT = Constant->getType();
+  if (S.Context.hasSameUnqualifiedType(OtherT, ConstantT))
+    return;
+  assert((OtherT->isIntegerType() && ConstantT->isIntegerType())
+         && "comparison with non-integer type");
+  // FIXME. handle cases for signedness to catch (signed char)N == 200
+  IntRange OtherRange = IntRange::forValueOfType(S.Context, OtherT);
+  IntRange LitRange = GetValueRange(S.Context, Value, Value.getBitWidth());
+  if (OtherRange.Width >= LitRange.Width)
+    return;
+  bool IsTrue = true;
+  if (op == BO_EQ)
+    IsTrue = false;
+  else if (op == BO_NE)
+    IsTrue = true;
+  else if (RhsConstant) {
+    if (op == BO_GT || op == BO_GE)
+      IsTrue = !LitRange.NonNegative;
+    else // op == BO_LT || op == BO_LE
+      IsTrue = LitRange.NonNegative;
+  } else {
+    if (op == BO_LT || op == BO_LE)
+      IsTrue = !LitRange.NonNegative;
+    else // op == BO_GT || op == BO_GE
+      IsTrue = LitRange.NonNegative;
+  }
+  SmallString<16> PrettySourceValue(Value.toString(10));
+  S.Diag(E->getOperatorLoc(), diag::warn_out_of_range_compare)
+  << PrettySourceValue << OtherT << IsTrue
+  << E->getLHS()->getSourceRange() << E->getRHS()->getSourceRange();
+}
+
 /// Analyze the operands of the given comparison.  Implements the
 /// fallback case from AnalyzeComparison.
 static void AnalyzeImpConvsInComparison(Sema &S, BinaryOperator *E) {
@@ -4153,20 +4377,42 @@ static void AnalyzeComparison(Sema &S, BinaryOperator *E) {
   QualType T = E->getLHS()->getType();
   assert(S.Context.hasSameUnqualifiedType(T, E->getRHS()->getType())
          && "comparison with mismatched types");
+  if (E->isValueDependent())
+    return AnalyzeImpConvsInComparison(S, E);
 
+  Expr *LHS = E->getLHS()->IgnoreParenImpCasts();
+  Expr *RHS = E->getRHS()->IgnoreParenImpCasts();
+  
+  bool IsComparisonConstant = false;
+  
+  // Check whether an integer constant comparison results in a value
+  // of 'true' or 'false'.
+  if (T->isIntegralType(S.Context)) {
+    llvm::APSInt RHSValue;
+    bool IsRHSIntegralLiteral = 
+      RHS->isIntegerConstantExpr(RHSValue, S.Context);
+    llvm::APSInt LHSValue;
+    bool IsLHSIntegralLiteral = 
+      LHS->isIntegerConstantExpr(LHSValue, S.Context);
+    if (IsRHSIntegralLiteral && !IsLHSIntegralLiteral)
+        DiagnoseOutOfRangeComparison(S, E, RHS, LHS, RHSValue, true);
+    else if (!IsRHSIntegralLiteral && IsLHSIntegralLiteral)
+      DiagnoseOutOfRangeComparison(S, E, LHS, RHS, LHSValue, false);
+    else
+      IsComparisonConstant = 
+        (IsRHSIntegralLiteral && IsLHSIntegralLiteral);
+  } else if (!T->hasUnsignedIntegerRepresentation())
+      IsComparisonConstant = E->isIntegerConstantExpr(S.Context);
+  
   // We don't do anything special if this isn't an unsigned integral
   // comparison:  we're only interested in integral comparisons, and
   // signed comparisons only happen in cases we don't care to warn about.
   //
   // We also don't care about value-dependent expressions or expressions
   // whose result is a constant.
-  if (!T->hasUnsignedIntegerRepresentation()
-      || E->isValueDependent() || E->isIntegerConstantExpr(S.Context))
+  if (!T->hasUnsignedIntegerRepresentation() || IsComparisonConstant)
     return AnalyzeImpConvsInComparison(S, E);
-
-  Expr *LHS = E->getLHS()->IgnoreParenImpCasts();
-  Expr *RHS = E->getRHS()->IgnoreParenImpCasts();
-
+  
   // Check to see if one of the (unmodified) operands is of different
   // signedness.
   Expr *signedOperand, *unsignedOperand;
@@ -4353,6 +4599,46 @@ std::string PrettyPrintInRange(const llvm::APSInt &Value, IntRange Range) {
   return ValueInRange.toString(10);
 }
 
+static bool IsImplicitBoolFloatConversion(Sema &S, Expr *Ex, bool ToBool) {
+  if (!isa<ImplicitCastExpr>(Ex))
+    return false;
+
+  Expr *InnerE = Ex->IgnoreParenImpCasts();
+  const Type *Target = S.Context.getCanonicalType(Ex->getType()).getTypePtr();
+  const Type *Source =
+    S.Context.getCanonicalType(InnerE->getType()).getTypePtr();
+  if (Target->isDependentType())
+    return false;
+
+  const BuiltinType *FloatCandidateBT =
+    dyn_cast<BuiltinType>(ToBool ? Source : Target);
+  const Type *BoolCandidateType = ToBool ? Target : Source;
+
+  return (BoolCandidateType->isSpecificBuiltinType(BuiltinType::Bool) &&
+          FloatCandidateBT && (FloatCandidateBT->isFloatingPoint()));
+}
+
+void CheckImplicitArgumentConversions(Sema &S, CallExpr *TheCall,
+                                      SourceLocation CC) {
+  unsigned NumArgs = TheCall->getNumArgs();
+  for (unsigned i = 0; i < NumArgs; ++i) {
+    Expr *CurrA = TheCall->getArg(i);
+    if (!IsImplicitBoolFloatConversion(S, CurrA, true))
+      continue;
+
+    bool IsSwapped = ((i > 0) &&
+        IsImplicitBoolFloatConversion(S, TheCall->getArg(i - 1), false));
+    IsSwapped |= ((i < (NumArgs - 1)) &&
+        IsImplicitBoolFloatConversion(S, TheCall->getArg(i + 1), false));
+    if (IsSwapped) {
+      // Warn on this floating-point to bool conversion.
+      DiagnoseImpCast(S, CurrA->IgnoreParenImpCasts(),
+                      CurrA->getType(), CC,
+                      diag::warn_impcast_floating_point_to_bool);
+    }
+  }
+}
+
 void CheckImplicitConversion(Sema &S, Expr *E, QualType T,
                              SourceLocation CC, bool *ICContext = 0) {
   if (E->isTypeDependent() || E->isValueDependent()) return;
@@ -4488,12 +4774,33 @@ void CheckImplicitConversion(Sema &S, Expr *E, QualType T,
       }
     }
 
+    // If the target is bool, warn if expr is a function or method call.
+    if (Target->isSpecificBuiltinType(BuiltinType::Bool) &&
+        isa<CallExpr>(E)) {
+      // Check last argument of function call to see if it is an
+      // implicit cast from a type matching the type the result
+      // is being cast to.
+      CallExpr *CEx = cast<CallExpr>(E);
+      unsigned NumArgs = CEx->getNumArgs();
+      if (NumArgs > 0) {
+        Expr *LastA = CEx->getArg(NumArgs - 1);
+        Expr *InnerE = LastA->IgnoreParenImpCasts();
+        const Type *InnerType =
+          S.Context.getCanonicalType(InnerE->getType()).getTypePtr();
+        if (isa<ImplicitCastExpr>(LastA) && (InnerType == Target)) {
+          // Warn on this floating-point to bool conversion
+          DiagnoseImpCast(S, E, T, CC,
+                          diag::warn_impcast_floating_point_to_bool);
+        }
+      }
+    }
     return;
   }
 
   if ((E->isNullPointerConstant(S.Context, Expr::NPC_ValueDependentIsNotNull)
            == Expr::NPCK_GNUNull) && !Target->isAnyPointerType()
-      && !Target->isBlockPointerType() && !Target->isMemberPointerType()) {
+      && !Target->isBlockPointerType() && !Target->isMemberPointerType()
+      && Target->isScalarType()) {
     SourceLocation Loc = E->getSourceRange().getBegin();
     if (Loc.isMacroID())
       Loc = S.SourceMgr.getImmediateExpansionRange(Loc).first;
@@ -4658,6 +4965,10 @@ void AnalyzeImplicitConversions(Sema &S, Expr *OrigE, SourceLocation CC) {
     return;
   }
 
+  // Check implicit argument conversions for function calls.
+  if (CallExpr *Call = dyn_cast<CallExpr>(E))
+    CheckImplicitArgumentConversions(S, Call, CC);
+
   // Go ahead and check any implicit conversions we might have skipped.
   // The non-canonical typecheck is just an optimization;
   // CheckImplicitConversion will filter out dead implicit conversions.
@@ -5077,7 +5388,8 @@ static bool considerVariable(VarDecl *var, Expr *ref, RetainCycleOwner &owner) {
     return false;
 
   owner.Variable = var;
-  owner.setLocsFrom(ref);
+  if (ref)
+    owner.setLocsFrom(ref);
   return true;
 }
 
@@ -5186,6 +5498,12 @@ namespace {
       if (block->getBlockDecl()->capturesVariable(Variable))
         Visit(block->getBlockDecl()->getBody());
     }
+    
+    void VisitOpaqueValueExpr(OpaqueValueExpr *OVE) {
+      if (Capturer) return;
+      if (OVE->getSourceExpr())
+        Visit(OVE->getSourceExpr());
+    }
   };
 }
 
@@ -5195,6 +5513,28 @@ static Expr *findCapturingExpr(Sema &S, Expr *e, RetainCycleOwner &owner) {
   assert(owner.Variable && owner.Loc.isValid());
 
   e = e->IgnoreParenCasts();
+
+  // Look through [^{...} copy] and Block_copy(^{...}).
+  if (ObjCMessageExpr *ME = dyn_cast<ObjCMessageExpr>(e)) {
+    Selector Cmd = ME->getSelector();
+    if (Cmd.isUnarySelector() && Cmd.getNameForSlot(0) == "copy") {
+      e = ME->getInstanceReceiver();
+      if (!e)
+        return 0;
+      e = e->IgnoreParenCasts();
+    }
+  } else if (CallExpr *CE = dyn_cast<CallExpr>(e)) {
+    if (CE->getNumArgs() == 1) {
+      FunctionDecl *Fn = dyn_cast_or_null<FunctionDecl>(CE->getCalleeDecl());
+      if (Fn) {
+        const IdentifierInfo *FnI = Fn->getIdentifier();
+        if (FnI && FnI->isStr("_Block_copy")) {
+          e = CE->getArg(0)->IgnoreParenCasts();
+        }
+      }
+    }
+  }
+  
   BlockExpr *block = dyn_cast<BlockExpr>(e);
   if (!block || !block->getBlockDecl()->capturesVariable(owner.Variable))
     return 0;
@@ -5271,6 +5611,20 @@ void Sema::checkRetainCycles(Expr *receiver, Expr *argument) {
     diagnoseRetainCycle(*this, capturer, owner);
 }
 
+void Sema::checkRetainCycles(VarDecl *Var, Expr *Init) {
+  RetainCycleOwner Owner;
+  if (!considerVariable(Var, /*DeclRefExpr=*/0, Owner))
+    return;
+  
+  // Because we don't have an expression for the variable, we have to set the
+  // location explicitly here.
+  Owner.Loc = Var->getLocation();
+  Owner.Range = Var->getSourceRange();
+  
+  if (Expr *Capturer = findCapturingExpr(*this, Init, Owner))
+    diagnoseRetainCycle(*this, Capturer, Owner);
+}
+
 bool Sema::checkUnsafeAssigns(SourceLocation Loc,
                               QualType LHS, Expr *RHS) {
   Qualifiers::ObjCLifetime LT = LHS.getObjCLifetime();
@@ -5304,9 +5658,19 @@ void Sema::checkUnsafeExprAssigns(SourceLocation Loc,
   
   if (LHSType.isNull())
     LHSType = LHS->getType();
+
+  Qualifiers::ObjCLifetime LT = LHSType.getObjCLifetime();
+
+  if (LT == Qualifiers::OCL_Weak) {
+    DiagnosticsEngine::Level Level =
+      Diags.getDiagnosticLevel(diag::warn_arc_repeated_use_of_weak, Loc);
+    if (Level != DiagnosticsEngine::Ignored)
+      getCurFunction()->markSafeWeakUse(LHS);
+  }
+
   if (checkUnsafeAssigns(Loc, LHSType, RHS))
     return;
-  Qualifiers::ObjCLifetime LT = LHSType.getObjCLifetime();
+
   // FIXME. Check for other life times.
   if (LT != Qualifiers::OCL_None)
     return;
@@ -5826,7 +6190,8 @@ void Sema::CheckArgumentWithTypeTag(const ArgumentWithTypeTagAttr *Attr,
   if (IsPointerAttr) {
     // Skip implicit cast of pointer to `void *' (as a function argument).
     if (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(ArgumentExpr))
-      if (ICE->getType()->isVoidPointerType())
+      if (ICE->getType()->isVoidPointerType() &&
+          ICE->getCastKind() == CK_BitCast)
         ArgumentExpr = ICE->getSubExpr();
   }
   QualType ArgumentType = ArgumentExpr->getType();
@@ -5881,4 +6246,3 @@ void Sema::CheckArgumentWithTypeTag(const ArgumentWithTypeTagAttr *Attr,
         << ArgumentExpr->getSourceRange()
         << TypeTagExpr->getSourceRange();
 }
-
diff --git a/lib/Sema/SemaCodeComplete.cpp b/lib/Sema/SemaCodeComplete.cpp
index adf132715738..b1aead8f026d 100644
--- a/lib/Sema/SemaCodeComplete.cpp
+++ b/lib/Sema/SemaCodeComplete.cpp
@@ -1059,10 +1059,12 @@ bool ResultBuilder::IsClassOrStruct(NamedDecl *ND) const {
   // Allow us to find class templates, too.
   if (ClassTemplateDecl *ClassTemplate = dyn_cast<ClassTemplateDecl>(ND))
     ND = ClassTemplate->getTemplatedDecl();
-  
+
+  // For purposes of this check, interfaces match too.
   if (RecordDecl *RD = dyn_cast<RecordDecl>(ND))
     return RD->getTagKind() == TTK_Class ||
-    RD->getTagKind() == TTK_Struct;
+    RD->getTagKind() == TTK_Struct ||
+    RD->getTagKind() == TTK_Interface;
   
   return false;
 }
@@ -1422,7 +1424,8 @@ static const char *GetCompletionTypeString(QualType T,
         if (!Tag->getIdentifier() && !Tag->getTypedefNameForAnonDecl()) {
           switch (Tag->getTagKind()) {
           case TTK_Struct: return "struct <anonymous>";
-          case TTK_Class:  return "class <anonymous>";            
+          case TTK_Interface: return "__interface <anonymous>";
+          case TTK_Class:  return "class <anonymous>";
           case TTK_Union:  return "union <anonymous>";
           case TTK_Enum:   return "enum <anonymous>";
           }
@@ -1449,7 +1452,7 @@ static void addThisCompletion(Sema &S, ResultBuilder &Results) {
                                                      Policy,
                                                      Allocator));
   Builder.AddTypedTextChunk("this");
-  Results.AddResult(CodeCompletionResult(Builder.TakeString()));            
+  Results.AddResult(CodeCompletionResult(Builder.TakeString()));
 }
 
 /// \brief Add language constructs that show up for "ordinary" names.
@@ -2480,7 +2483,6 @@ CodeCompletionResult::CreateCodeCompletionString(ASTContext &Ctx,
     
     if (Declaration) {
       Result.addParentContext(Declaration->getDeclContext());
-      Pattern->ParentKind = Result.getParentKind();
       Pattern->ParentName = Result.getParentName();
     }
     
@@ -2493,7 +2495,7 @@ CodeCompletionResult::CreateCodeCompletionString(ASTContext &Ctx,
   }
   
   if (Kind == RK_Macro) {
-    MacroInfo *MI = PP.getMacroInfo(Macro);
+    MacroInfo *MI = PP.getMacroInfoHistory(Macro);
     assert(MI && "Not a macro?");
 
     Result.AddTypedTextChunk(
@@ -2880,10 +2882,14 @@ CXCursorKind clang::getCursorKindForDecl(Decl *D) {
       case ObjCPropertyImplDecl::Synthesize:
         return CXCursor_ObjCSynthesizeDecl;
       }
+
+      case Decl::Import:
+        return CXCursor_ModuleImportDecl;
       
     default:
       if (TagDecl *TD = dyn_cast<TagDecl>(D)) {
         switch (TD->getTagKind()) {
+          case TTK_Interface:  // fall through
           case TTK_Struct: return CXCursor_StructDecl;
           case TTK_Class:  return CXCursor_ClassDecl;
           case TTK_Union:  return CXCursor_UnionDecl;
@@ -2896,6 +2902,7 @@ CXCursorKind clang::getCursorKindForDecl(Decl *D) {
 }
 
 static void AddMacroResults(Preprocessor &PP, ResultBuilder &Results,
+                            bool IncludeUndefined,
                             bool TargetTypeIsPointer = false) {
   typedef CodeCompletionResult Result;
   
@@ -2904,7 +2911,8 @@ static void AddMacroResults(Preprocessor &PP, ResultBuilder &Results,
   for (Preprocessor::macro_iterator M = PP.macro_begin(), 
                                  MEnd = PP.macro_end();
        M != MEnd; ++M) {
-    Results.AddResult(Result(M->first, 
+    if (IncludeUndefined || M->first->hasMacroDefinition())
+      Results.AddResult(Result(M->first,
                              getMacroUsagePriority(M->first->getName(),
                                                    PP.getLangOpts(),
                                                    TargetTypeIsPointer)));
@@ -3125,7 +3133,6 @@ void Sema::CodeCompleteModuleImport(SourceLocation ImportLoc,
 
 void Sema::CodeCompleteOrdinaryName(Scope *S, 
                                     ParserCompletionContext CompletionContext) {
-  typedef CodeCompletionResult Result;
   ResultBuilder Results(*this, CodeCompleter->getAllocator(),
                         CodeCompleter->getCodeCompletionTUInfo(),
                         mapCodeCompletionContext(*this, CompletionContext));
@@ -3204,7 +3211,7 @@ void Sema::CodeCompleteOrdinaryName(Scope *S,
   }
   
   if (CodeCompleter->includeMacros())
-    AddMacroResults(PP, Results);
+    AddMacroResults(PP, Results, false);
   
   HandleCodeCompleteResults(this, CodeCompleter, Results.getCompletionContext(),
                             Results.data(),Results.size());
@@ -3296,7 +3303,6 @@ struct Sema::CodeCompleteExpressionData {
 /// type we're looking for.
 void Sema::CodeCompleteExpression(Scope *S, 
                                   const CodeCompleteExpressionData &Data) {
-  typedef CodeCompletionResult Result;
   ResultBuilder Results(*this, CodeCompleter->getAllocator(),
                         CodeCompleter->getCodeCompletionTUInfo(),
                         CodeCompletionContext::CCC_Expression);
@@ -3336,7 +3342,7 @@ void Sema::CodeCompleteExpression(Scope *S,
     AddPrettyFunctionResults(PP.getLangOpts(), Results);        
 
   if (CodeCompleter->includeMacros())
-    AddMacroResults(PP, Results, PreferredTypeIsPointer);
+    AddMacroResults(PP, Results, false, PreferredTypeIsPointer);
   HandleCodeCompleteResults(this, CodeCompleter, 
                 CodeCompletionContext(CodeCompletionContext::CCC_Expression, 
                                       Data.PreferredType),
@@ -3580,7 +3586,6 @@ void Sema::CodeCompleteTag(Scope *S, unsigned TagSpec) {
   if (!CodeCompleter)
     return;
   
-  typedef CodeCompletionResult Result;
   ResultBuilder::LookupFilter Filter = 0;
   enum CodeCompletionContext::Kind ContextKind
     = CodeCompletionContext::CCC_Other;
@@ -3597,6 +3602,7 @@ void Sema::CodeCompleteTag(Scope *S, unsigned TagSpec) {
     
   case DeclSpec::TST_struct:
   case DeclSpec::TST_class:
+  case DeclSpec::TST_interface:
     Filter = &ResultBuilder::IsClassOrStruct;
     ContextKind = CodeCompletionContext::CCC_ClassOrStructTag;
     break;
@@ -3728,7 +3734,7 @@ void Sema::CodeCompleteCase(Scope *S) {
   //so only say we include macros if the code completer says we do
   enum CodeCompletionContext::Kind kind = CodeCompletionContext::CCC_Other;
   if (CodeCompleter->includeMacros()) {
-    AddMacroResults(PP, Results);
+    AddMacroResults(PP, Results, false);
     kind = CodeCompletionContext::CCC_OtherWithMacros;
   }
   
@@ -3898,7 +3904,6 @@ void Sema::CodeCompleteReturn(Scope *S) {
 }
 
 void Sema::CodeCompleteAfterIf(Scope *S) {
-  typedef CodeCompletionResult Result;
   ResultBuilder Results(*this, CodeCompleter->getAllocator(),
                         CodeCompleter->getCodeCompletionTUInfo(),
                         mapCodeCompletionContext(*this, PCC_Statement));
@@ -3952,7 +3957,7 @@ void Sema::CodeCompleteAfterIf(Scope *S) {
     AddPrettyFunctionResults(PP.getLangOpts(), Results);        
   
   if (CodeCompleter->includeMacros())
-    AddMacroResults(PP, Results);
+    AddMacroResults(PP, Results, false);
   
   HandleCodeCompleteResults(this, CodeCompleter, Results.getCompletionContext(),
                             Results.data(),Results.size());
@@ -4408,7 +4413,6 @@ static void AddObjCTopLevelResults(ResultBuilder &Results, bool NeedAt) {
 }
 
 void Sema::CodeCompleteObjCAtDirective(Scope *S) {
-  typedef CodeCompletionResult Result;
   ResultBuilder Results(*this, CodeCompleter->getAllocator(),
                         CodeCompleter->getCodeCompletionTUInfo(),
                         CodeCompletionContext::CCC_Other);
@@ -4595,26 +4599,23 @@ static bool ObjCPropertyFlagConflicts(unsigned Attributes, unsigned NewFlag) {
   
   // Check for collisions with "readonly".
   if ((Attributes & ObjCDeclSpec::DQ_PR_readonly) &&
-      (Attributes & (ObjCDeclSpec::DQ_PR_readwrite |
-                     ObjCDeclSpec::DQ_PR_assign |
-                     ObjCDeclSpec::DQ_PR_unsafe_unretained |
-                     ObjCDeclSpec::DQ_PR_copy |
-                     ObjCDeclSpec::DQ_PR_retain |
-                     ObjCDeclSpec::DQ_PR_strong)))
+      (Attributes & ObjCDeclSpec::DQ_PR_readwrite))
     return true;
   
-  // Check for more than one of { assign, copy, retain, strong }.
+  // Check for more than one of { assign, copy, retain, strong, weak }.
   unsigned AssignCopyRetMask = Attributes & (ObjCDeclSpec::DQ_PR_assign |
                                          ObjCDeclSpec::DQ_PR_unsafe_unretained |
                                              ObjCDeclSpec::DQ_PR_copy |
-                                             ObjCDeclSpec::DQ_PR_retain|
-                                             ObjCDeclSpec::DQ_PR_strong);
+                                             ObjCDeclSpec::DQ_PR_retain |
+                                             ObjCDeclSpec::DQ_PR_strong |
+                                             ObjCDeclSpec::DQ_PR_weak);
   if (AssignCopyRetMask &&
       AssignCopyRetMask != ObjCDeclSpec::DQ_PR_assign &&
       AssignCopyRetMask != ObjCDeclSpec::DQ_PR_unsafe_unretained &&
       AssignCopyRetMask != ObjCDeclSpec::DQ_PR_copy &&
       AssignCopyRetMask != ObjCDeclSpec::DQ_PR_retain &&
-      AssignCopyRetMask != ObjCDeclSpec::DQ_PR_strong)
+      AssignCopyRetMask != ObjCDeclSpec::DQ_PR_strong &&
+      AssignCopyRetMask != ObjCDeclSpec::DQ_PR_weak)
     return true;
   
   return false;
@@ -4626,7 +4627,6 @@ void Sema::CodeCompleteObjCPropertyFlags(Scope *S, ObjCDeclSpec &ODS) {
   
   unsigned Attributes = ODS.getPropertyAttributes();
   
-  typedef CodeCompletionResult Result;
   ResultBuilder Results(*this, CodeCompleter->getAllocator(),
                         CodeCompleter->getCodeCompletionTUInfo(),
                         CodeCompletionContext::CCC_Other);
@@ -4650,6 +4650,12 @@ void Sema::CodeCompleteObjCPropertyFlags(Scope *S, ObjCDeclSpec &ODS) {
     Results.AddResult(CodeCompletionResult("nonatomic"));
   if (!ObjCPropertyFlagConflicts(Attributes, ObjCDeclSpec::DQ_PR_atomic))
     Results.AddResult(CodeCompletionResult("atomic"));
+
+  // Only suggest "weak" if we're compiling for ARC-with-weak-references or GC.
+  if (getLangOpts().ObjCARCWeak || getLangOpts().getGC() != LangOptions::NonGC)
+    if (!ObjCPropertyFlagConflicts(Attributes, ObjCDeclSpec::DQ_PR_weak))
+      Results.AddResult(CodeCompletionResult("weak"));
+
   if (!ObjCPropertyFlagConflicts(Attributes, ObjCDeclSpec::DQ_PR_setter)) {
     CodeCompletionBuilder Setter(Results.getAllocator(),
                                  Results.getCodeCompletionTUInfo());
@@ -4837,8 +4843,6 @@ static void AddObjCMethods(ObjCContainerDecl *Container,
 
 
 void Sema::CodeCompleteObjCPropertyGetter(Scope *S) {
-  typedef CodeCompletionResult Result;
-
   // Try to find the interface where getters might live.
   ObjCInterfaceDecl *Class = dyn_cast_or_null<ObjCInterfaceDecl>(CurContext);
   if (!Class) {
@@ -4866,8 +4870,6 @@ void Sema::CodeCompleteObjCPropertyGetter(Scope *S) {
 }
 
 void Sema::CodeCompleteObjCPropertySetter(Scope *S) {
-  typedef CodeCompletionResult Result;
-
   // Try to find the interface where setters might live.
   ObjCInterfaceDecl *Class
     = dyn_cast_or_null<ObjCInterfaceDecl>(CurContext);
@@ -4898,7 +4900,6 @@ void Sema::CodeCompleteObjCPropertySetter(Scope *S) {
 
 void Sema::CodeCompleteObjCPassingType(Scope *S, ObjCDeclSpec &DS,
                                        bool IsParameter) {
-  typedef CodeCompletionResult Result;
   ResultBuilder Results(*this, CodeCompleter->getAllocator(),
                         CodeCompleter->getCodeCompletionTUInfo(),
                         CodeCompletionContext::CCC_Type);
@@ -4957,7 +4958,7 @@ void Sema::CodeCompleteObjCPassingType(Scope *S, ObjCDeclSpec &DS,
                      CodeCompleter->includeGlobals());
   
   if (CodeCompleter->includeMacros())
-    AddMacroResults(PP, Results);
+    AddMacroResults(PP, Results, false);
 
   HandleCodeCompleteResults(this, CodeCompleter,
                             CodeCompletionContext::CCC_Type,
@@ -5041,7 +5042,7 @@ static ObjCInterfaceDecl *GetAssumedMessageSendExprType(Expr *E) {
 ///
 /// \param S The semantic analysis object.
 ///
-/// \param S NeedSuperKeyword Whether we need to prefix this completion with
+/// \param NeedSuperKeyword Whether we need to prefix this completion with
 /// the "super" keyword. Otherwise, we just need to provide the arguments.
 ///
 /// \param SelIdents The identifiers in the selector that have already been
@@ -5187,7 +5188,7 @@ void Sema::CodeCompleteObjCMessageReceiver(Scope *S) {
   Results.ExitScope();
   
   if (CodeCompleter->includeMacros())
-    AddMacroResults(PP, Results);
+    AddMacroResults(PP, Results, false);
   HandleCodeCompleteResults(this, CodeCompleter, Results.getCompletionContext(),
                             Results.data(), Results.size());
   
@@ -5339,11 +5340,11 @@ static void AddClassMessageCompletions(Sema &SemaRef, Scope *S,
     
     // If we have an external source, load the entire class method
     // pool from the AST file.
-    if (SemaRef.ExternalSource) {
+    if (SemaRef.getExternalSource()) {
       for (uint32_t I = 0, 
-                    N = SemaRef.ExternalSource->GetNumExternalSelectors();
+                    N = SemaRef.getExternalSource()->GetNumExternalSelectors();
            I != N; ++I) {
-        Selector Sel = SemaRef.ExternalSource->GetExternalSelector(I);
+        Selector Sel = SemaRef.getExternalSource()->GetExternalSelector(I);
         if (Sel.isNull() || SemaRef.MethodPool.count(Sel))
           continue;
         
@@ -5868,7 +5869,6 @@ void Sema::CodeCompleteObjCImplementationCategory(Scope *S,
 }
 
 void Sema::CodeCompleteObjCPropertyDefinition(Scope *S) {
-  typedef CodeCompletionResult Result;
   ResultBuilder Results(*this, CodeCompleter->getAllocator(),
                         CodeCompleter->getCodeCompletionTUInfo(),
                         CodeCompletionContext::CCC_Other);
@@ -7169,7 +7169,9 @@ void Sema::CodeCompletePreprocessorMacroName(bool IsDefinition) {
          M != MEnd; ++M) {
       Builder.AddTypedTextChunk(Builder.getAllocator().CopyString(
                                            M->first->getName()));
-      Results.AddResult(Builder.TakeString());
+      Results.AddResult(CodeCompletionResult(Builder.TakeString(),
+                                             CCP_CodePattern,
+                                             CXCursor_MacroDefinition));
     }
     Results.ExitScope();
   } else if (IsDefinition) {
@@ -7186,7 +7188,7 @@ void Sema::CodeCompletePreprocessorExpression() {
                         CodeCompletionContext::CCC_PreprocessorExpression);
   
   if (!CodeCompleter || CodeCompleter->includeMacros())
-    AddMacroResults(PP, Results);
+    AddMacroResults(PP, Results, true);
   
     // defined (<macro>)
   Results.EnterNewScope();
@@ -7235,7 +7237,7 @@ void Sema::GatherGlobalCodeCompletions(CodeCompletionAllocator &Allocator,
   }
   
   if (!CodeCompleter || CodeCompleter->includeMacros())
-    AddMacroResults(PP, Builder);
+    AddMacroResults(PP, Builder, true);
   
   Results.clear();
   Results.insert(Results.end(), 
diff --git a/lib/Sema/SemaDecl.cpp b/lib/Sema/SemaDecl.cpp
index ea181de00a98..0092d5dab1f4 100644
--- a/lib/Sema/SemaDecl.cpp
+++ b/lib/Sema/SemaDecl.cpp
@@ -350,8 +350,8 @@ ParsedType Sema::getTypeName(IdentifierInfo &II, SourceLocation NameLoc,
 /// isTagName() - This method is called *for error recovery purposes only*
 /// to determine if the specified name is a valid tag name ("struct foo").  If
 /// so, this returns the TST for the tag corresponding to it (TST_enum,
-/// TST_union, TST_struct, TST_class).  This is used to diagnose cases in C
-/// where the user forgot to specify the tag.
+/// TST_union, TST_struct, TST_interface, TST_class).  This is used to diagnose
+/// cases in C where the user forgot to specify the tag.
 DeclSpec::TST Sema::isTagName(IdentifierInfo &II, Scope *S) {
   // Do a tag name lookup in this scope.
   LookupResult R(*this, &II, SourceLocation(), LookupTagName);
@@ -361,6 +361,7 @@ DeclSpec::TST Sema::isTagName(IdentifierInfo &II, Scope *S) {
     if (const TagDecl *TD = R.getAsSingle<TagDecl>()) {
       switch (TD->getTagKind()) {
       case TTK_Struct: return DeclSpec::TST_struct;
+      case TTK_Interface: return DeclSpec::TST_interface;
       case TTK_Union:  return DeclSpec::TST_union;
       case TTK_Class:  return DeclSpec::TST_class;
       case TTK_Enum:   return DeclSpec::TST_enum;
@@ -434,7 +435,8 @@ bool Sema::DiagnoseUnknownTypeName(IdentifierInfo *&II,
       else if (DeclContext *DC = computeDeclContext(*SS, false))
         Diag(IILoc, diag::err_unknown_nested_typename_suggest)
           << II << DC << CorrectedQuotedStr << SS->getRange()
-          << FixItHint::CreateReplacement(SourceRange(IILoc), CorrectedStr);
+          << FixItHint::CreateReplacement(Corrected.getCorrectionRange(),
+                                          CorrectedStr);
       else
         llvm_unreachable("could not have corrected a typo here");
 
@@ -517,9 +519,9 @@ static bool isTagTypeWithMissingTag(Sema &SemaRef, LookupResult &Result,
                                     Scope *S, CXXScopeSpec &SS,
                                     IdentifierInfo *&Name,
                                     SourceLocation NameLoc) {
-  Result.clear(Sema::LookupTagName);
-  SemaRef.LookupParsedName(Result, S, &SS);
-  if (TagDecl *Tag = Result.getAsSingle<TagDecl>()) {
+  LookupResult R(SemaRef, Name, NameLoc, Sema::LookupTagName);
+  SemaRef.LookupParsedName(R, S, &SS);
+  if (TagDecl *Tag = R.getAsSingle<TagDecl>()) {
     const char *TagName = 0;
     const char *FixItTagName = 0;
     switch (Tag->getTagKind()) {
@@ -538,6 +540,11 @@ static bool isTagTypeWithMissingTag(Sema &SemaRef, LookupResult &Result,
         FixItTagName = "struct ";
         break;
 
+      case TTK_Interface:
+        TagName = "__interface";
+        FixItTagName = "__interface ";
+        break;
+
       case TTK_Union:
         TagName = "union";
         FixItTagName = "union ";
@@ -548,25 +555,42 @@ static bool isTagTypeWithMissingTag(Sema &SemaRef, LookupResult &Result,
       << Name << TagName << SemaRef.getLangOpts().CPlusPlus
       << FixItHint::CreateInsertion(NameLoc, FixItTagName);
 
-    LookupResult R(SemaRef, Name, NameLoc, Sema::LookupOrdinaryName);
-    if (SemaRef.LookupParsedName(R, S, &SS)) {
-      for (LookupResult::iterator I = R.begin(), IEnd = R.end();
-           I != IEnd; ++I)
-        SemaRef.Diag((*I)->getLocation(), diag::note_decl_hiding_tag_type)
-          << Name << TagName;
-    }
+    for (LookupResult::iterator I = Result.begin(), IEnd = Result.end();
+         I != IEnd; ++I)
+      SemaRef.Diag((*I)->getLocation(), diag::note_decl_hiding_tag_type)
+        << Name << TagName;
+
+    // Replace lookup results with just the tag decl.
+    Result.clear(Sema::LookupTagName);
+    SemaRef.LookupParsedName(Result, S, &SS);
     return true;
   }
 
-  Result.clear(Sema::LookupOrdinaryName);
   return false;
 }
 
+/// Build a ParsedType for a simple-type-specifier with a nested-name-specifier.
+static ParsedType buildNestedType(Sema &S, CXXScopeSpec &SS,
+                                  QualType T, SourceLocation NameLoc) {
+  ASTContext &Context = S.Context;
+
+  TypeLocBuilder Builder;
+  Builder.pushTypeSpec(T).setNameLoc(NameLoc);
+
+  T = S.getElaboratedType(ETK_None, SS, T);
+  ElaboratedTypeLoc ElabTL = Builder.push<ElaboratedTypeLoc>(T);
+  ElabTL.setElaboratedKeywordLoc(SourceLocation());
+  ElabTL.setQualifierLoc(SS.getWithLocInContext(Context));
+  return S.CreateParsedType(T, Builder.getTypeSourceInfo(Context, T));
+}
+
 Sema::NameClassification Sema::ClassifyName(Scope *S,
                                             CXXScopeSpec &SS,
                                             IdentifierInfo *&Name,
                                             SourceLocation NameLoc,
-                                            const Token &NextToken) {
+                                            const Token &NextToken,
+                                            bool IsAddressOfOperand,
+                                            CorrectionCandidateCallback *CCC) {
   DeclarationNameInfo NameInfo(Name, NameLoc);
   ObjCMethodDecl *CurMethod = getCurMethodDecl();
   
@@ -632,25 +656,11 @@ Corrected:
 
     // Perform typo correction to determine if there is another name that is
     // close to this name.
-    if (!SecondTry) {
+    if (!SecondTry && CCC) {
       SecondTry = true;
-      CorrectionCandidateCallback DefaultValidator;
-      // Try to limit which sets of keywords should be included in typo
-      // correction based on what the next token is.
-      DefaultValidator.WantTypeSpecifiers =
-          NextToken.is(tok::l_paren) || NextToken.is(tok::less) ||
-          NextToken.is(tok::identifier) || NextToken.is(tok::star) ||
-          NextToken.is(tok::amp) || NextToken.is(tok::l_square);
-      DefaultValidator.WantExpressionKeywords =
-          NextToken.is(tok::l_paren) || NextToken.is(tok::identifier) ||
-          NextToken.is(tok::arrow) || NextToken.is(tok::period);
-      DefaultValidator.WantRemainingKeywords =
-          NextToken.is(tok::l_paren) || NextToken.is(tok::semi) ||
-          NextToken.is(tok::identifier) || NextToken.is(tok::l_brace);
-      DefaultValidator.WantCXXNamedCasts = false;
       if (TypoCorrection Corrected = CorrectTypo(Result.getLookupNameInfo(),
                                                  Result.getLookupKind(), S, 
-                                                 &SS, DefaultValidator)) {
+                                                 &SS, *CCC)) {
         unsigned UnqualifiedDiag = diag::err_undeclared_var_use_suggest;
         unsigned QualifiedDiag = diag::err_no_member_suggest;
         std::string CorrectedStr(Corrected.getAsString(getLangOpts()));
@@ -675,11 +685,12 @@ Corrected:
           Diag(NameLoc, UnqualifiedDiag)
             << Name << CorrectedQuotedStr
             << FixItHint::CreateReplacement(NameLoc, CorrectedStr);
-        else
+        else // FIXME: is this even reachable? Test it.
           Diag(NameLoc, QualifiedDiag)
             << Name << computeDeclContext(SS, false) << CorrectedQuotedStr
             << SS.getRange()
-            << FixItHint::CreateReplacement(NameLoc, CorrectedStr);
+            << FixItHint::CreateReplacement(Corrected.getCorrectionRange(),
+                                            CorrectedStr);
 
         // Update the name, so that the caller has the new name.
         Name = Corrected.getCorrectionAsIdentifierInfo();
@@ -705,7 +716,7 @@ Corrected:
         if (ObjCIvarDecl *Ivar = Result.getAsSingle<ObjCIvarDecl>()) {
           Result.clear();
           ExprResult E(LookupInObjCMethod(Result, S, Ivar->getIdentifier()));
-          return move(E);
+          return E;
         }
         
         goto Corrected;
@@ -731,8 +742,9 @@ Corrected:
     // perform some heroics to see if we actually have a 
     // template-argument-list, which would indicate a missing 'template'
     // keyword here.
-    return BuildDependentDeclRefExpr(SS, /*TemplateKWLoc=*/SourceLocation(),
-                                     NameInfo, /*TemplateArgs=*/0);
+    return ActOnDependentIdExpression(SS, /*TemplateKWLoc=*/SourceLocation(),
+                                      NameInfo, IsAddressOfOperand,
+                                      /*TemplateArgs=*/0);
   }
 
   case LookupResult::Found:
@@ -808,14 +820,16 @@ Corrected:
       return NameClassification::TypeTemplate(Template);
     }
   }
-  
+
   NamedDecl *FirstDecl = (*Result.begin())->getUnderlyingDecl();
   if (TypeDecl *Type = dyn_cast<TypeDecl>(FirstDecl)) {
     DiagnoseUseOfDecl(Type, NameLoc);
     QualType T = Context.getTypeDeclType(Type);
+    if (SS.isNotEmpty())
+      return buildNestedType(*this, SS, T, NameLoc);
     return ParsedType::make(T);
   }
-  
+
   ObjCInterfaceDecl *Class = dyn_cast<ObjCInterfaceDecl>(FirstDecl);
   if (!Class) {
     // FIXME: It's unfortunate that we don't have a Type node for handling this.
@@ -838,24 +852,28 @@ Corrected:
     return ParsedType::make(T);
   }
 
+  // We can have a type template here if we're classifying a template argument.
+  if (isa<TemplateDecl>(FirstDecl) && !isa<FunctionTemplateDecl>(FirstDecl))
+    return NameClassification::TypeTemplate(
+        TemplateName(cast<TemplateDecl>(FirstDecl)));
+
   // Check for a tag type hidden by a non-type decl in a few cases where it
   // seems likely a type is wanted instead of the non-type that was found.
-  if (!getLangOpts().ObjC1 && FirstDecl && !isa<ClassTemplateDecl>(FirstDecl) &&
-      !isa<TypeAliasTemplateDecl>(FirstDecl)) {
+  if (!getLangOpts().ObjC1) {
     bool NextIsOp = NextToken.is(tok::amp) || NextToken.is(tok::star);
     if ((NextToken.is(tok::identifier) ||
          (NextIsOp && FirstDecl->isFunctionOrFunctionTemplate())) &&
         isTagTypeWithMissingTag(*this, Result, S, SS, Name, NameLoc)) {
-      FirstDecl = (*Result.begin())->getUnderlyingDecl();
-      if (TypeDecl *Type = dyn_cast<TypeDecl>(FirstDecl)) {
-        DiagnoseUseOfDecl(Type, NameLoc);
-        QualType T = Context.getTypeDeclType(Type);
-        return ParsedType::make(T);
-      }
+      TypeDecl *Type = Result.getAsSingle<TypeDecl>();
+      DiagnoseUseOfDecl(Type, NameLoc);
+      QualType T = Context.getTypeDeclType(Type);
+      if (SS.isNotEmpty())
+        return buildNestedType(*this, SS, T, NameLoc);
+      return ParsedType::make(T);
     }
   }
   
-  if (!Result.empty() && (*Result.begin())->isCXXClassMember())
+  if (FirstDecl->isCXXClassMember())
     return BuildPossibleImplicitMemberExpr(SS, SourceLocation(), Result, 0);
 
   bool ADL = UseArgumentDependentLookup(SS, Result, NextToken.is(tok::l_paren));
@@ -1186,8 +1204,14 @@ bool Sema::ShouldWarnIfUnusedFileScopedDecl(const DeclaratorDecl *D) const {
         Context.DeclMustBeEmitted(FD))
       return false;
   } else if (const VarDecl *VD = dyn_cast<VarDecl>(D)) {
+    // Don't warn on variables of const-qualified or reference type, since their
+    // values can be used even if though they're not odr-used, and because const
+    // qualified variables can appear in headers in contexts where they're not
+    // intended to be used.
+    // FIXME: Use more principled rules for these exemptions.
     if (!VD->isFileVarDecl() ||
-        VD->getType().isConstant(Context) ||
+        VD->getType().isConstQualified() ||
+        VD->getType()->isReferenceType() ||
         Context.DeclMustBeEmitted(VD))
       return false;
 
@@ -1248,7 +1272,7 @@ static bool ShouldDiagnoseUnusedDecl(const NamedDecl *D) {
     QualType Ty = VD->getType();
 
     // Only look at the outermost level of typedef.
-    if (const TypedefType *TT = dyn_cast<TypedefType>(Ty)) {
+    if (const TypedefType *TT = Ty->getAs<TypedefType>()) {
       if (TT->getDecl()->hasAttr<UnusedAttr>())
         return false;
     }
@@ -1268,6 +1292,8 @@ static bool ShouldDiagnoseUnusedDecl(const NamedDecl *D) {
           return false;
 
         if (const Expr *Init = VD->getInit()) {
+          if (const ExprWithCleanups *Cleanups = dyn_cast<ExprWithCleanups>(Init))
+            Init = Cleanups->getSubExpr();
           const CXXConstructExpr *Construct =
             dyn_cast<CXXConstructExpr>(Init);
           if (Construct && !Construct->isElidable()) {
@@ -1706,6 +1732,25 @@ DeclHasAttr(const Decl *D, const Attr *A) {
   if (AA)
     return false;
 
+  // The following thread safety attributes can also be duplicated.
+  switch (A->getKind()) {
+    case attr::ExclusiveLocksRequired:
+    case attr::SharedLocksRequired:
+    case attr::LocksExcluded:
+    case attr::ExclusiveLockFunction:
+    case attr::SharedLockFunction:
+    case attr::UnlockFunction:
+    case attr::ExclusiveTrylockFunction:
+    case attr::SharedTrylockFunction:
+    case attr::GuardedBy:
+    case attr::PtGuardedBy:
+    case attr::AcquiredBefore:
+    case attr::AcquiredAfter:
+      return false;
+    default:
+      ;
+  }
+
   const OwnershipAttr *OA = dyn_cast<OwnershipAttr>(A);
   const AnnotateAttr *Ann = dyn_cast<AnnotateAttr>(A);
   for (Decl::attr_iterator i = D->attr_begin(), e = D->attr_end(); i != e; ++i)
@@ -1908,6 +1953,19 @@ static bool canRedefineFunction(const FunctionDecl *FD,
           FD->getStorageClass() == SC_Extern);
 }
 
+/// Is the given calling convention the ABI default for the given
+/// declaration?
+static bool isABIDefaultCC(Sema &S, CallingConv CC, FunctionDecl *D) {
+  CallingConv ABIDefaultCC;
+  if (isa<CXXMethodDecl>(D) && cast<CXXMethodDecl>(D)->isInstance()) {
+    ABIDefaultCC = S.Context.getDefaultCXXMethodCallConv(D->isVariadic());
+  } else {
+    // Free C function or a static method.
+    ABIDefaultCC = (S.Context.getLangOpts().MRTD ? CC_X86StdCall : CC_C);
+  }
+  return ABIDefaultCC == CC;
+}
+
 /// MergeFunctionDecl - We just parsed a function 'New' from
 /// declarator D which has the same name and scope as a previous
 /// declaration 'Old'.  Figure out how to resolve this situation,
@@ -1976,6 +2034,9 @@ bool Sema::MergeFunctionDecl(FunctionDecl *New, Decl *OldD, Scope *S) {
   // later declared or defined without one, the second decl assumes the
   // calling convention of the first.
   //
+  // It's OK if a function is first declared without a calling convention,
+  // but is later declared or defined with the default calling convention.
+  //
   // For the new decl, we have to look at the NON-canonical type to tell the
   // difference between a function that really doesn't have a calling
   // convention and one that is declared cdecl. That's because in
@@ -1989,10 +2050,22 @@ bool Sema::MergeFunctionDecl(FunctionDecl *New, Decl *OldD, Scope *S) {
   FunctionType::ExtInfo OldTypeInfo = OldType->getExtInfo();
   FunctionType::ExtInfo NewTypeInfo = NewType->getExtInfo();
   bool RequiresAdjustment = false;
-  if (OldTypeInfo.getCC() != CC_Default &&
-      NewTypeInfo.getCC() == CC_Default) {
+  if (OldTypeInfo.getCC() == NewTypeInfo.getCC()) {
+    // Fast path: nothing to do.
+
+  // Inherit the CC from the previous declaration if it was specified
+  // there but not here.
+  } else if (NewTypeInfo.getCC() == CC_Default) {
     NewTypeInfo = NewTypeInfo.withCallingConv(OldTypeInfo.getCC());
     RequiresAdjustment = true;
+
+  // Don't complain about mismatches when the default CC is
+  // effectively the same as the explict one.
+  } else if (OldTypeInfo.getCC() == CC_Default &&
+             isABIDefaultCC(*this, NewTypeInfo.getCC(), New)) {
+    NewTypeInfo = NewTypeInfo.withCallingConv(OldTypeInfo.getCC());
+    RequiresAdjustment = true;
+
   } else if (!Context.isSameCallConv(OldTypeInfo.getCC(),
                                      NewTypeInfo.getCC())) {
     // Calling conventions really aren't compatible, so complain.
@@ -2398,7 +2471,7 @@ void Sema::MergeVarDeclTypes(VarDecl *New, VarDecl *Old) {
   }
   if (MergedT.isNull()) {
     Diag(New->getLocation(), diag::err_redefinition_different_type)
-      << New->getDeclName();
+      << New->getDeclName() << New->getType() << Old->getType();
     Diag(Old->getLocation(), diag::note_previous_definition);
     return New->setInvalidDecl();
   }
@@ -2551,8 +2624,7 @@ void Sema::MergeVarDecl(VarDecl *New, LookupResult &Previous) {
 /// no declarator (e.g. "struct foo;") is parsed.
 Decl *Sema::ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS,
                                        DeclSpec &DS) {
-  return ParsedFreeStandingDeclSpec(S, AS, DS,
-                                    MultiTemplateParamsArg(*this, 0, 0));
+  return ParsedFreeStandingDeclSpec(S, AS, DS, MultiTemplateParamsArg());
 }
 
 /// ParsedFreeStandingDeclSpec - This method is invoked when a declspec with
@@ -2565,6 +2637,7 @@ Decl *Sema::ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS,
   TagDecl *Tag = 0;
   if (DS.getTypeSpecType() == DeclSpec::TST_class ||
       DS.getTypeSpecType() == DeclSpec::TST_struct ||
+      DS.getTypeSpecType() == DeclSpec::TST_interface ||
       DS.getTypeSpecType() == DeclSpec::TST_union ||
       DS.getTypeSpecType() == DeclSpec::TST_enum) {
     TagD = DS.getRepAsDecl();
@@ -2603,7 +2676,8 @@ Decl *Sema::ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS,
       Diag(DS.getConstexprSpecLoc(), diag::err_constexpr_tag)
         << (DS.getTypeSpecType() == DeclSpec::TST_class ? 0 :
             DS.getTypeSpecType() == DeclSpec::TST_struct ? 1 :
-            DS.getTypeSpecType() == DeclSpec::TST_union ? 2 : 3);
+            DS.getTypeSpecType() == DeclSpec::TST_interface ? 2 :
+            DS.getTypeSpecType() == DeclSpec::TST_union ? 3 : 4);
     else
       Diag(DS.getConstexprSpecLoc(), diag::err_constexpr_no_declarators);
     // Don't emit warnings after this error.
@@ -2724,16 +2798,17 @@ Decl *Sema::ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS,
     DeclSpec::TST TypeSpecType = DS.getTypeSpecType();
     if (TypeSpecType == DeclSpec::TST_class ||
         TypeSpecType == DeclSpec::TST_struct ||
+        TypeSpecType == DeclSpec::TST_interface ||
         TypeSpecType == DeclSpec::TST_union ||
         TypeSpecType == DeclSpec::TST_enum) {
       AttributeList* attrs = DS.getAttributes().getList();
       while (attrs) {
-        Diag(attrs->getScopeLoc(),
-             diag::warn_declspec_attribute_ignored)
+        Diag(attrs->getLoc(), diag::warn_declspec_attribute_ignored)
         << attrs->getName()
         << (TypeSpecType == DeclSpec::TST_class ? 0 :
             TypeSpecType == DeclSpec::TST_struct ? 1 :
-            TypeSpecType == DeclSpec::TST_union ? 2 : 3);
+            TypeSpecType == DeclSpec::TST_union ? 2 :
+            TypeSpecType == DeclSpec::TST_interface ? 3 : 4);
         attrs = attrs->getNext();
       }
     }
@@ -3353,7 +3428,6 @@ static bool RebuildDeclaratorInCurrentInstantiation(Sema &S, Declarator &D,
   switch (DS.getTypeSpecType()) {
   case DeclSpec::TST_typename:
   case DeclSpec::TST_typeofType:
-  case DeclSpec::TST_decltype:
   case DeclSpec::TST_underlyingType:
   case DeclSpec::TST_atomic: {
     // Grab the type from the parser.
@@ -3377,6 +3451,7 @@ static bool RebuildDeclaratorInCurrentInstantiation(Sema &S, Declarator &D,
     break;
   }
 
+  case DeclSpec::TST_decltype:
   case DeclSpec::TST_typeofExpr: {
     Expr *E = DS.getRepAsExpr();
     ExprResult Result = S.RebuildExprInCurrentInstantiation(E);
@@ -3411,7 +3486,7 @@ static bool RebuildDeclaratorInCurrentInstantiation(Sema &S, Declarator &D,
 
 Decl *Sema::ActOnDeclarator(Scope *S, Declarator &D) {
   D.setFunctionDefinitionKind(FDK_Declaration);
-  Decl *Dcl = HandleDeclarator(S, D, MultiTemplateParamsArg(*this));
+  Decl *Dcl = HandleDeclarator(S, D, MultiTemplateParamsArg());
 
   if (OriginalLexicalContext && OriginalLexicalContext->isObjCContainer() &&
       Dcl && Dcl->getDeclContext()->isFileContext())
@@ -3476,7 +3551,8 @@ bool Sema::diagnoseQualifiedDeclaration(CXXScopeSpec &SS, DeclContext *DC,
   //   void X::f();
   // };
   if (Cur->Equals(DC)) {
-    Diag(Loc, diag::warn_member_extra_qualification)
+    Diag(Loc, LangOpts.MicrosoftExt? diag::warn_member_extra_qualification
+                                   : diag::err_member_extra_qualification)
       << Name << FixItHint::CreateRemoval(SS.getRange());
     SS.clear();
     return false;
@@ -3710,11 +3786,11 @@ Decl *Sema::HandleDeclarator(Scope *S, Declarator &D,
     New = ActOnTypedefDeclarator(S, D, DC, TInfo, Previous);
   } else if (R->isFunctionType()) {
     New = ActOnFunctionDeclarator(S, D, DC, TInfo, Previous,
-                                  move(TemplateParamLists),
+                                  TemplateParamLists,
                                   AddToScope);
   } else {
     New = ActOnVariableDeclarator(S, D, DC, TInfo, Previous,
-                                  move(TemplateParamLists));
+                                  TemplateParamLists);
   }
 
   if (New == 0)
@@ -3729,9 +3805,9 @@ Decl *Sema::HandleDeclarator(Scope *S, Declarator &D,
   return New;
 }
 
-/// TryToFixInvalidVariablyModifiedType - Helper method to turn variable array
-/// types into constant array types in certain situations which would otherwise
-/// be errors (for GCC compatibility).
+/// Helper method to turn variable array types into constant array
+/// types in certain situations which would otherwise be errors (for
+/// GCC compatibility).
 static QualType TryToFixInvalidVariablyModifiedType(QualType T,
                                                     ASTContext &Context,
                                                     bool &SizeIsNegative,
@@ -3799,6 +3875,52 @@ static QualType TryToFixInvalidVariablyModifiedType(QualType T,
                                       Res, ArrayType::Normal, 0);
 }
 
+static void
+FixInvalidVariablyModifiedTypeLoc(TypeLoc SrcTL, TypeLoc DstTL) {
+  if (PointerTypeLoc* SrcPTL = dyn_cast<PointerTypeLoc>(&SrcTL)) {
+    PointerTypeLoc* DstPTL = cast<PointerTypeLoc>(&DstTL);
+    FixInvalidVariablyModifiedTypeLoc(SrcPTL->getPointeeLoc(),
+                                      DstPTL->getPointeeLoc());
+    DstPTL->setStarLoc(SrcPTL->getStarLoc());
+    return;
+  }
+  if (ParenTypeLoc* SrcPTL = dyn_cast<ParenTypeLoc>(&SrcTL)) {
+    ParenTypeLoc* DstPTL = cast<ParenTypeLoc>(&DstTL);
+    FixInvalidVariablyModifiedTypeLoc(SrcPTL->getInnerLoc(),
+                                      DstPTL->getInnerLoc());
+    DstPTL->setLParenLoc(SrcPTL->getLParenLoc());
+    DstPTL->setRParenLoc(SrcPTL->getRParenLoc());
+    return;
+  }
+  ArrayTypeLoc* SrcATL = cast<ArrayTypeLoc>(&SrcTL);
+  ArrayTypeLoc* DstATL = cast<ArrayTypeLoc>(&DstTL);
+  TypeLoc SrcElemTL = SrcATL->getElementLoc();
+  TypeLoc DstElemTL = DstATL->getElementLoc();
+  DstElemTL.initializeFullCopy(SrcElemTL);
+  DstATL->setLBracketLoc(SrcATL->getLBracketLoc());
+  DstATL->setSizeExpr(SrcATL->getSizeExpr());
+  DstATL->setRBracketLoc(SrcATL->getRBracketLoc());
+}
+
+/// Helper method to turn variable array types into constant array
+/// types in certain situations which would otherwise be errors (for
+/// GCC compatibility).
+static TypeSourceInfo*
+TryToFixInvalidVariablyModifiedTypeSourceInfo(TypeSourceInfo *TInfo,
+                                              ASTContext &Context,
+                                              bool &SizeIsNegative,
+                                              llvm::APSInt &Oversized) {
+  QualType FixedTy
+    = TryToFixInvalidVariablyModifiedType(TInfo->getType(), Context,
+                                          SizeIsNegative, Oversized);
+  if (FixedTy.isNull())
+    return 0;
+  TypeSourceInfo *FixedTInfo = Context.getTrivialTypeSourceInfo(FixedTy);
+  FixInvalidVariablyModifiedTypeLoc(TInfo->getTypeLoc(),
+                                    FixedTInfo->getTypeLoc());
+  return FixedTInfo;
+}
+
 /// \brief Register the given locally-scoped external C declaration so
 /// that it can be found later for redeclarations
 void
@@ -3926,19 +4048,21 @@ Sema::CheckTypedefForVariablyModifiedType(Scope *S, TypedefNameDecl *NewTD) {
   // then it shall have block scope.
   // Note that variably modified types must be fixed before merging the decl so
   // that redeclarations will match.
-  QualType T = NewTD->getUnderlyingType();
+  TypeSourceInfo *TInfo = NewTD->getTypeSourceInfo();
+  QualType T = TInfo->getType();
   if (T->isVariablyModifiedType()) {
     getCurFunction()->setHasBranchProtectedScope();
 
     if (S->getFnParent() == 0) {
       bool SizeIsNegative;
       llvm::APSInt Oversized;
-      QualType FixedTy =
-          TryToFixInvalidVariablyModifiedType(T, Context, SizeIsNegative,
-                                              Oversized);
-      if (!FixedTy.isNull()) {
+      TypeSourceInfo *FixedTInfo =
+        TryToFixInvalidVariablyModifiedTypeSourceInfo(TInfo, Context,
+                                                      SizeIsNegative,
+                                                      Oversized);
+      if (FixedTInfo) {
         Diag(NewTD->getLocation(), diag::warn_illegal_constant_array_size);
-        NewTD->setTypeSourceInfo(Context.getTrivialTypeSourceInfo(FixedTy));
+        NewTD->setTypeSourceInfo(FixedTInfo);
       } else {
         if (SizeIsNegative)
           Diag(NewTD->getLocation(), diag::err_typecheck_negative_array_size);
@@ -4203,7 +4327,7 @@ Sema::ActOnVariableDeclarator(Scope *S, Declarator &D, DeclContext *DC,
                                   D.getDeclSpec().getLocStart(),
                                                   D.getIdentifierLoc(),
                                                   D.getCXXScopeSpec(),
-                                                  TemplateParamLists.get(),
+                                                  TemplateParamLists.data(),
                                                   TemplateParamLists.size(),
                                                   /*never a friend*/ false,
                                                   isExplicitSpecialization,
@@ -4244,7 +4368,7 @@ Sema::ActOnVariableDeclarator(Scope *S, Declarator &D, DeclContext *DC,
     if (TemplateParamLists.size() > 0 && D.getCXXScopeSpec().isSet()) {
       NewVD->setTemplateParameterListsInfo(Context,
                                            TemplateParamLists.size(),
-                                           TemplateParamLists.release());
+                                           TemplateParamLists.data());
     }
 
     if (D.getDeclSpec().isConstexprSpecified())
@@ -4281,6 +4405,14 @@ Sema::ActOnVariableDeclarator(Scope *S, Declarator &D, DeclContext *DC,
   // Handle attributes prior to checking for duplicates in MergeVarDecl
   ProcessDeclAttributes(S, NewVD, D);
 
+  if (getLangOpts().CUDA) {
+    // CUDA B.2.5: "__shared__ and __constant__ variables have implied static
+    // storage [duration]."
+    if (SC == SC_None && S->getFnParent() != 0 &&
+       (NewVD->hasAttr<CUDASharedAttr>() || NewVD->hasAttr<CUDAConstantAttr>()))
+      NewVD->setStorageClass(SC_Static);
+  }
+
   // In auto-retain/release, infer strong retension for variables of
   // retainable type.
   if (getLangOpts().ObjCAutoRefCount && inferObjCARCLifetime(NewVD))
@@ -4490,7 +4622,8 @@ bool Sema::CheckVariableDeclaration(VarDecl *NewVD,
   if (NewVD->isInvalidDecl())
     return false;
 
-  QualType T = NewVD->getType();
+  TypeSourceInfo *TInfo = NewVD->getTypeSourceInfo();
+  QualType T = TInfo->getType();
 
   if (T->isObjCObjectType()) {
     Diag(NewVD->getLocation(), diag::err_statically_allocated_object)
@@ -4522,8 +4655,10 @@ bool Sema::CheckVariableDeclaration(VarDecl *NewVD,
       && !NewVD->hasAttr<BlocksAttr>()) {
     if (getLangOpts().getGC() != LangOptions::NonGC)
       Diag(NewVD->getLocation(), diag::warn_gc_attribute_weak_on_local);
-    else
+    else {
+      assert(!getLangOpts().ObjCAutoRefCount);
       Diag(NewVD->getLocation(), diag::warn_attribute_weak_on_local);
+    }
   }
   
   bool isVM = T->isVariablyModifiedType();
@@ -4535,11 +4670,10 @@ bool Sema::CheckVariableDeclaration(VarDecl *NewVD,
       (T->isVariableArrayType() && NewVD->hasGlobalStorage())) {
     bool SizeIsNegative;
     llvm::APSInt Oversized;
-    QualType FixedTy =
-        TryToFixInvalidVariablyModifiedType(T, Context, SizeIsNegative,
-                                            Oversized);
-
-    if (FixedTy.isNull() && T->isVariableArrayType()) {
+    TypeSourceInfo *FixedTInfo =
+      TryToFixInvalidVariablyModifiedTypeSourceInfo(TInfo, Context,
+                                                    SizeIsNegative, Oversized);
+    if (FixedTInfo == 0 && T->isVariableArrayType()) {
       const VariableArrayType *VAT = Context.getAsVariableArrayType(T);
       // FIXME: This won't give the correct result for
       // int a[10][n];
@@ -4558,7 +4692,7 @@ bool Sema::CheckVariableDeclaration(VarDecl *NewVD,
       return false;
     }
 
-    if (FixedTy.isNull()) {
+    if (FixedTInfo == 0) {
       if (NewVD->isFileVarDecl())
         Diag(NewVD->getLocation(), diag::err_vm_decl_in_file_scope);
       else
@@ -4568,7 +4702,8 @@ bool Sema::CheckVariableDeclaration(VarDecl *NewVD,
     }
 
     Diag(NewVD->getLocation(), diag::warn_illegal_constant_array_size);
-    NewVD->setType(FixedTy);
+    NewVD->setType(FixedTInfo->getType());
+    NewVD->setTypeSourceInfo(FixedTInfo);
   }
 
   if (Previous.empty() && NewVD->isExternC()) {
@@ -4655,6 +4790,31 @@ static bool FindOverriddenMethod(const CXXBaseSpecifier *Specifier,
   return false;
 }
 
+namespace {
+  enum OverrideErrorKind { OEK_All, OEK_NonDeleted, OEK_Deleted };
+}
+/// \brief Report an error regarding overriding, along with any relevant
+/// overriden methods.
+///
+/// \param DiagID the primary error to report.
+/// \param MD the overriding method.
+/// \param OEK which overrides to include as notes.
+static void ReportOverrides(Sema& S, unsigned DiagID, const CXXMethodDecl *MD,
+                            OverrideErrorKind OEK = OEK_All) {
+  S.Diag(MD->getLocation(), DiagID) << MD->getDeclName();
+  for (CXXMethodDecl::method_iterator I = MD->begin_overridden_methods(),
+                                      E = MD->end_overridden_methods();
+       I != E; ++I) {
+    // This check (& the OEK parameter) could be replaced by a predicate, but
+    // without lambdas that would be overkill. This is still nicer than writing
+    // out the diag loop 3 times.
+    if ((OEK == OEK_All) ||
+        (OEK == OEK_NonDeleted && !(*I)->isDeleted()) ||
+        (OEK == OEK_Deleted && (*I)->isDeleted()))
+      S.Diag((*I)->getLocation(), diag::note_overridden_virtual_function);
+  }
+}
+
 /// AddOverriddenMethods - See if a method overrides any in the base classes,
 /// and if so, check that it's a valid override and remember it.
 bool Sema::AddOverriddenMethods(CXXRecordDecl *DC, CXXMethodDecl *MD) {
@@ -4663,6 +4823,8 @@ bool Sema::AddOverriddenMethods(CXXRecordDecl *DC, CXXMethodDecl *MD) {
   FindOverriddenMethodData Data;
   Data.Method = MD;
   Data.S = this;
+  bool hasDeletedOverridenMethods = false;
+  bool hasNonDeletedOverridenMethods = false;
   bool AddedAny = false;
   if (DC->lookupInBases(&FindOverriddenMethod, &Data, Paths)) {
     for (CXXBasePaths::decl_iterator I = Paths.found_decls_begin(),
@@ -4672,12 +4834,21 @@ bool Sema::AddOverriddenMethods(CXXRecordDecl *DC, CXXMethodDecl *MD) {
         if (!CheckOverridingFunctionReturnType(MD, OldMD) &&
             !CheckOverridingFunctionExceptionSpec(MD, OldMD) &&
             !CheckIfOverriddenFunctionIsMarkedFinal(MD, OldMD)) {
+          hasDeletedOverridenMethods |= OldMD->isDeleted();
+          hasNonDeletedOverridenMethods |= !OldMD->isDeleted();
           AddedAny = true;
         }
       }
     }
   }
-  
+
+  if (hasDeletedOverridenMethods && !MD->isDeleted()) {
+    ReportOverrides(*this, diag::err_non_deleted_override, MD, OEK_Deleted);
+  }
+  if (hasNonDeletedOverridenMethods && MD->isDeleted()) {
+    ReportOverrides(*this, diag::err_deleted_override, MD, OEK_NonDeleted);
+  }
+
   return AddedAny;
 }
 
@@ -4837,6 +5008,10 @@ static NamedDecl* DiagnoseInvalidRedeclaration(
   }
 
   if (Correction) {
+    // FIXME: use Correction.getCorrectionRange() instead of computing the range
+    // here. This requires passing in the CXXScopeSpec to CorrectTypo which in
+    // turn causes the correction to fully qualify the name. If we fix
+    // CorrectTypo to minimally qualify then this change should be good.
     SourceRange FixItLoc(NewFD->getLocation());
     CXXScopeSpec &SS = ExtraArgs.D.getCXXScopeSpec();
     if (Correction.getCorrectionSpecifier() && SS.isValid())
@@ -5072,6 +5247,22 @@ static FunctionDecl* CreateNewFunctionDecl(Sema &SemaRef, Declarator &D,
   }
 }
 
+void Sema::checkVoidParamDecl(ParmVarDecl *Param) {
+  // In C++, the empty parameter-type-list must be spelled "void"; a
+  // typedef of void is not permitted.
+  if (getLangOpts().CPlusPlus &&
+      Param->getType().getUnqualifiedType() != Context.VoidTy) {
+    bool IsTypeAlias = false;
+    if (const TypedefType *TT = Param->getType()->getAs<TypedefType>())
+      IsTypeAlias = isa<TypeAliasDecl>(TT->getDecl());
+    else if (const TemplateSpecializationType *TST =
+               Param->getType()->getAs<TemplateSpecializationType>())
+      IsTypeAlias = TST->isTypeAlias();
+    Diag(Param->getLocation(), diag::err_param_typedef_of_void)
+      << IsTypeAlias;
+  }
+}
+
 NamedDecl*
 Sema::ActOnFunctionDeclarator(Scope *S, Declarator &D, DeclContext *DC,
                               TypeSourceInfo *TInfo, LookupResult &Previous,
@@ -5138,6 +5329,15 @@ Sema::ActOnFunctionDeclarator(Scope *S, Declarator &D, DeclContext *DC,
       NewFD->setImplicitlyInline();
     }
 
+    // If this is a method defined in an __interface, and is not a constructor
+    // or an overloaded operator, then set the pure flag (isVirtual will already
+    // return true).
+    if (const CXXRecordDecl *Parent =
+          dyn_cast<CXXRecordDecl>(NewFD->getDeclContext())) {
+      if (Parent->isInterface() && cast<CXXMethodDecl>(NewFD)->isUserProvided())
+        NewFD->setPure(true);
+    }
+
     SetNestedNameSpecifier(NewFD, D);
     isExplicitSpecialization = false;
     isFunctionTemplateSpecialization = false;
@@ -5157,7 +5357,7 @@ Sema::ActOnFunctionDeclarator(Scope *S, Declarator &D, DeclContext *DC,
                                   D.getDeclSpec().getLocStart(),
                                   D.getIdentifierLoc(),
                                   D.getCXXScopeSpec(),
-                                  TemplateParamLists.get(),
+                                  TemplateParamLists.data(),
                                   TemplateParamLists.size(),
                                   isFriend,
                                   isExplicitSpecialization,
@@ -5196,7 +5396,7 @@ Sema::ActOnFunctionDeclarator(Scope *S, Declarator &D, DeclContext *DC,
         if (TemplateParamLists.size() > 1) {
           NewFD->setTemplateParameterListsInfo(Context,
                                                TemplateParamLists.size() - 1,
-                                               TemplateParamLists.release());
+                                               TemplateParamLists.data());
         }
       } else {
         // This is a function template specialization.
@@ -5204,7 +5404,7 @@ Sema::ActOnFunctionDeclarator(Scope *S, Declarator &D, DeclContext *DC,
         // For source fidelity, store all the template param lists.
         NewFD->setTemplateParameterListsInfo(Context,
                                              TemplateParamLists.size(),
-                                             TemplateParamLists.release());
+                                             TemplateParamLists.data());
 
         // C++0x [temp.expl.spec]p20 forbids "template<> friend void foo(int);".
         if (isFriend) {
@@ -5236,7 +5436,7 @@ Sema::ActOnFunctionDeclarator(Scope *S, Declarator &D, DeclContext *DC,
         // For source fidelity, store all the template param lists.
         NewFD->setTemplateParameterListsInfo(Context,
                                              TemplateParamLists.size(),
-                                             TemplateParamLists.release());
+                                             TemplateParamLists.data());
     }
 
     if (Invalid) {
@@ -5376,6 +5576,20 @@ Sema::ActOnFunctionDeclarator(Scope *S, Declarator &D, DeclContext *DC,
            diag::err_static_out_of_line)
         << FixItHint::CreateRemoval(D.getDeclSpec().getStorageClassSpecLoc());
     }
+
+    // C++11 [except.spec]p15:
+    //   A deallocation function with no exception-specification is treated
+    //   as if it were specified with noexcept(true).
+    const FunctionProtoType *FPT = R->getAs<FunctionProtoType>();
+    if ((Name.getCXXOverloadedOperator() == OO_Delete ||
+         Name.getCXXOverloadedOperator() == OO_Array_Delete) &&
+        getLangOpts().CPlusPlus0x && FPT && !FPT->hasExceptionSpec()) {
+      FunctionProtoType::ExtProtoInfo EPI = FPT->getExtProtoInfo();
+      EPI.ExceptionSpecType = EST_BasicNoexcept;
+      NewFD->setType(Context.getFunctionType(FPT->getResultType(),
+                                             FPT->arg_type_begin(),
+                                             FPT->getNumArgs(), EPI));
+    }
   }
 
   // Filter out previous declarations that don't match the scope.
@@ -5413,21 +5627,7 @@ Sema::ActOnFunctionDeclarator(Scope *S, Declarator &D, DeclContext *DC,
         FTI.ArgInfo[0].Param &&
         cast<ParmVarDecl>(FTI.ArgInfo[0].Param)->getType()->isVoidType()) {
       // Empty arg list, don't push any params.
-      ParmVarDecl *Param = cast<ParmVarDecl>(FTI.ArgInfo[0].Param);
-
-      // In C++, the empty parameter-type-list must be spelled "void"; a
-      // typedef of void is not permitted.
-      if (getLangOpts().CPlusPlus &&
-          Param->getType().getUnqualifiedType() != Context.VoidTy) {
-        bool IsTypeAlias = false;
-        if (const TypedefType *TT = Param->getType()->getAs<TypedefType>())
-          IsTypeAlias = isa<TypeAliasDecl>(TT->getDecl());
-        else if (const TemplateSpecializationType *TST =
-                   Param->getType()->getAs<TemplateSpecializationType>())
-          IsTypeAlias = TST->isTypeAlias();
-        Diag(Param->getLocation(), diag::err_param_typedef_of_void)
-          << IsTypeAlias;
-      }
+      checkVoidParamDecl(cast<ParmVarDecl>(FTI.ArgInfo[0].Param));
     } else if (FTI.NumArgs > 0 && FTI.ArgInfo[0].Param != 0) {
       for (unsigned i = 0, e = FTI.NumArgs; i != e; ++i) {
         ParmVarDecl *Param = cast<ParmVarDecl>(FTI.ArgInfo[i].Param);
@@ -5500,6 +5700,9 @@ Sema::ActOnFunctionDeclarator(Scope *S, Declarator &D, DeclContext *DC,
       D.setRedeclaration(CheckFunctionDeclaration(S, NewFD, Previous,
                                                   isExplicitSpecialization));
     }
+    // Make graceful recovery from an invalid redeclaration.
+    else if (!Previous.empty())
+           D.setRedeclaration(true);
     assert((NewFD->isInvalidDecl() || !D.isRedeclaration() ||
             Previous.getResultKind() != LookupResult::FoundOverloaded) &&
            "previous declaration set still overloaded");
@@ -5510,12 +5713,10 @@ Sema::ActOnFunctionDeclarator(Scope *S, Declarator &D, DeclContext *DC,
       TemplateIdAnnotation *TemplateId = D.getName().TemplateId;
       TemplateArgs.setLAngleLoc(TemplateId->LAngleLoc);
       TemplateArgs.setRAngleLoc(TemplateId->RAngleLoc);
-      ASTTemplateArgsPtr TemplateArgsPtr(*this,
-                                         TemplateId->getTemplateArgs(),
+      ASTTemplateArgsPtr TemplateArgsPtr(TemplateId->getTemplateArgs(),
                                          TemplateId->NumArgs);
       translateTemplateArguments(TemplateArgsPtr,
                                  TemplateArgs);
-      TemplateArgsPtr.release();
     
       HasExplicitTemplateArgs = true;
     
@@ -5969,20 +6170,12 @@ bool Sema::CheckFunctionDeclaration(Scope *S, FunctionDecl *NewFD,
     // Find any virtual functions that this function overrides.
     if (CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(NewFD)) {
       if (!Method->isFunctionTemplateSpecialization() && 
-          !Method->getDescribedFunctionTemplate()) {
+          !Method->getDescribedFunctionTemplate() &&
+          Method->isCanonicalDecl()) {
         if (AddOverriddenMethods(Method->getParent(), Method)) {
           // If the function was marked as "static", we have a problem.
           if (NewFD->getStorageClass() == SC_Static) {
-            Diag(NewFD->getLocation(), diag::err_static_overrides_virtual)
-              << NewFD->getDeclName();
-            for (CXXMethodDecl::method_iterator 
-                      Overridden = Method->begin_overridden_methods(),
-                   OverriddenEnd = Method->end_overridden_methods();
-                 Overridden != OverriddenEnd;
-                 ++Overridden) {
-              Diag((*Overridden)->getLocation(), 
-                   diag::note_overridden_virtual_function);
-            }
+            ReportOverrides(*this, diag::err_static_overrides_virtual, Method);
           }
         }
       }
@@ -6191,28 +6384,12 @@ namespace {
       }
     }
 
-    // Sometimes, the expression passed in lacks the casts that are used
-    // to determine which DeclRefExpr's to check.  Assume that the casts
-    // are present and continue visiting the expression.
-    void HandleExpr(Expr *E) {
-      // Skip checking T a = a where T is not a record or reference type.
-      // Doing so is a way to silence uninitialized warnings.
-      if (isRecordType || isReferenceType)
-        if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E))
-          HandleDeclRefExpr(DRE);
-
-      if (ConditionalOperator *CO = dyn_cast<ConditionalOperator>(E)) {
-        HandleValue(CO->getTrueExpr());
-        HandleValue(CO->getFalseExpr());
-      }
-
-      Visit(E);
-    }
-
     // For most expressions, the cast is directly above the DeclRefExpr.
     // For conditional operators, the cast can be outside the conditional
     // operator if both expressions are DeclRefExpr's.
     void HandleValue(Expr *E) {
+      if (isReferenceType)
+        return;
       E = E->IgnoreParenImpCasts();
       if (DeclRefExpr* DRE = dyn_cast<DeclRefExpr>(E)) {
         HandleDeclRefExpr(DRE);
@@ -6222,11 +6399,32 @@ namespace {
       if (ConditionalOperator *CO = dyn_cast<ConditionalOperator>(E)) {
         HandleValue(CO->getTrueExpr());
         HandleValue(CO->getFalseExpr());
+        return;
+      }
+
+      if (isa<MemberExpr>(E)) {
+        Expr *Base = E->IgnoreParenImpCasts();
+        while (MemberExpr *ME = dyn_cast<MemberExpr>(Base)) {
+          // Check for static member variables and don't warn on them.
+          if (!isa<FieldDecl>(ME->getMemberDecl()))
+            return;
+          Base = ME->getBase()->IgnoreParenImpCasts();
+        }
+        if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(Base))
+          HandleDeclRefExpr(DRE);
+        return;
       }
     }
 
+    // Reference types are handled here since all uses of references are
+    // bad, not just r-value uses.
+    void VisitDeclRefExpr(DeclRefExpr *E) {
+      if (isReferenceType)
+        HandleDeclRefExpr(E);
+    }
+
     void VisitImplicitCastExpr(ImplicitCastExpr *E) {
-      if ((!isRecordType && E->getCastKind() == CK_LValueToRValue) ||
+      if (E->getCastKind() == CK_LValueToRValue ||
           (isRecordType && E->getCastKind() == CK_NoOp))
         HandleValue(E->getSubExpr());
 
@@ -6237,22 +6435,36 @@ namespace {
       // Don't warn on arrays since they can be treated as pointers.
       if (E->getType()->canDecayToPointerType()) return;
 
-      ValueDecl *VD = E->getMemberDecl();
-      CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(VD);
-      if (isa<FieldDecl>(VD) || (MD && !MD->isStatic()))
-        if (DeclRefExpr *DRE
-              = dyn_cast<DeclRefExpr>(E->getBase()->IgnoreParenImpCasts())) {
+      // Warn when a non-static method call is followed by non-static member
+      // field accesses, which is followed by a DeclRefExpr.
+      CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(E->getMemberDecl());
+      bool Warn = (MD && !MD->isStatic());
+      Expr *Base = E->getBase()->IgnoreParenImpCasts();
+      while (MemberExpr *ME = dyn_cast<MemberExpr>(Base)) {
+        if (!isa<FieldDecl>(ME->getMemberDecl()))
+          Warn = false;
+        Base = ME->getBase()->IgnoreParenImpCasts();
+      }
+
+      if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(Base)) {
+        if (Warn)
           HandleDeclRefExpr(DRE);
-          return;
-        }
+        return;
+      }
 
-      Inherited::VisitMemberExpr(E);
+      // The base of a MemberExpr is not a MemberExpr or a DeclRefExpr.
+      // Visit that expression.
+      Visit(Base);
     }
 
     void VisitUnaryOperator(UnaryOperator *E) {
       // For POD record types, addresses of its own members are well-defined.
-      if (E->getOpcode() == UO_AddrOf && isRecordType && isPODType &&
-          isa<MemberExpr>(E->getSubExpr()->IgnoreParens())) return;
+      if (E->getOpcode() == UO_AddrOf && isRecordType &&
+          isa<MemberExpr>(E->getSubExpr()->IgnoreParens())) {
+        if (!isPODType)
+          HandleValue(E->getSubExpr());
+        return;
+      }
       Inherited::VisitUnaryOperator(E);
     } 
 
@@ -6261,20 +6473,38 @@ namespace {
     void HandleDeclRefExpr(DeclRefExpr *DRE) {
       Decl* ReferenceDecl = DRE->getDecl(); 
       if (OrigDecl != ReferenceDecl) return;
-      LookupResult Result(S, DRE->getNameInfo(), Sema::LookupOrdinaryName,
-                          Sema::NotForRedeclaration);
+      unsigned diag = isReferenceType
+          ? diag::warn_uninit_self_reference_in_reference_init
+          : diag::warn_uninit_self_reference_in_init;
       S.DiagRuntimeBehavior(DRE->getLocStart(), DRE,
-                            S.PDiag(diag::warn_uninit_self_reference_in_init)
-                              << Result.getLookupName()
+                            S.PDiag(diag)
+                              << DRE->getNameInfo().getName()
                               << OrigDecl->getLocation()
                               << DRE->getSourceRange());
     }
   };
-}
 
-/// CheckSelfReference - Warns if OrigDecl is used in expression E.
-void Sema::CheckSelfReference(Decl* OrigDecl, Expr *E) {
-  SelfReferenceChecker(*this, OrigDecl).HandleExpr(E);
+  /// CheckSelfReference - Warns if OrigDecl is used in expression E.
+  static void CheckSelfReference(Sema &S, Decl* OrigDecl, Expr *E,
+                                 bool DirectInit) {
+    // Parameters arguments are occassionially constructed with itself,
+    // for instance, in recursive functions.  Skip them.
+    if (isa<ParmVarDecl>(OrigDecl))
+      return;
+
+    E = E->IgnoreParens();
+
+    // Skip checking T a = a where T is not a record or reference type.
+    // Doing so is a way to silence uninitialized warnings.
+    if (!DirectInit && !cast<VarDecl>(OrigDecl)->getType()->isRecordType())
+      if (ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E))
+        if (ICE->getCastKind() == CK_LValueToRValue)
+          if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(ICE->getSubExpr()))
+            if (DRE->getDecl() == OrigDecl)
+              return;
+
+    SelfReferenceChecker(S, OrigDecl).Visit(E);
+  }
 }
 
 /// AddInitializerToDecl - Adds the initializer Init to the
@@ -6311,15 +6541,6 @@ void Sema::AddInitializerToDecl(Decl *RealDecl, Expr *Init,
     return;
   }
 
-  // Check for self-references within variable initializers.
-  // Variables declared within a function/method body (except for references)
-  // are handled by a dataflow analysis.
-  // Record types initialized by initializer list are handled here.
-  // Initialization by constructors are handled in TryConstructorInitialization.
-  if ((!VDecl->hasLocalStorage() || VDecl->getType()->isReferenceType()) &&
-      (isa<InitListExpr>(Init) || !VDecl->getType()->isRecordType()))
-    CheckSelfReference(RealDecl, Init);
-
   ParenListExpr *CXXDirectInit = dyn_cast<ParenListExpr>(Init);
 
   // C++11 [decl.spec.auto]p6. Deduce the type which 'auto' stands in for.
@@ -6495,8 +6716,7 @@ void Sema::AddInitializerToDecl(Decl *RealDecl, Expr *Init,
     }
     InitializationSequence InitSeq(*this, Entity, Kind, Args, NumArgs);
     ExprResult Result = InitSeq.Perform(*this, Entity, Kind,
-                                              MultiExprArg(*this, Args,NumArgs),
-                                              &DclT);
+                                        MultiExprArg(Args, NumArgs), &DclT);
     if (Result.isInvalid()) {
       VDecl->setInvalidDecl();
       return;
@@ -6505,6 +6725,14 @@ void Sema::AddInitializerToDecl(Decl *RealDecl, Expr *Init,
     Init = Result.takeAs<Expr>();
   }
 
+  // Check for self-references within variable initializers.
+  // Variables declared within a function/method body (except for references)
+  // are handled by a dataflow analysis.
+  if (!VDecl->hasLocalStorage() || VDecl->getType()->isRecordType() ||
+      VDecl->getType()->isReferenceType()) {
+    CheckSelfReference(*this, RealDecl, Init, DirectInit);
+  }
+
   // If the type changed, it means we had an incomplete type that was
   // completed by the initializer. For example:
   //   int ary[] = { 1, 3, 5 };
@@ -6515,9 +6743,28 @@ void Sema::AddInitializerToDecl(Decl *RealDecl, Expr *Init,
   // Check any implicit conversions within the expression.
   CheckImplicitConversions(Init, VDecl->getLocation());
 
-  if (!VDecl->isInvalidDecl())
+  if (!VDecl->isInvalidDecl()) {
     checkUnsafeAssigns(VDecl->getLocation(), VDecl->getType(), Init);
 
+    if (VDecl->hasAttr<BlocksAttr>())
+      checkRetainCycles(VDecl, Init);
+
+    // It is safe to assign a weak reference into a strong variable.
+    // Although this code can still have problems:
+    //   id x = self.weakProp;
+    //   id y = self.weakProp;
+    // we do not warn to warn spuriously when 'x' and 'y' are on separate
+    // paths through the function. This should be revisited if
+    // -Wrepeated-use-of-weak is made flow-sensitive.
+    if (VDecl->getType().getObjCLifetime() == Qualifiers::OCL_Strong) {
+      DiagnosticsEngine::Level Level =
+        Diags.getDiagnosticLevel(diag::warn_arc_repeated_use_of_weak,
+                                 Init->getLocStart());
+      if (Level != DiagnosticsEngine::Ignored)
+        getCurFunction()->markSafeWeakUse(Init);
+    }
+  }
+
   Init = MaybeCreateExprWithCleanups(Init);
   // Attach the initializer to the decl.
   VDecl->setInit(Init);
@@ -6758,8 +7005,10 @@ void Sema::ActOnUninitializedDecl(Decl *RealDecl,
                                  AbstractVariableType))
         Var->setInvalidDecl();
       if (!Type->isDependentType() && !Var->isInvalidDecl() &&
-          Var->getStorageClass() == SC_PrivateExtern)
+          Var->getStorageClass() == SC_PrivateExtern) {
         Diag(Var->getLocation(), diag::warn_private_extern);
+        Diag(Var->getLocation(), diag::note_private_extern);
+      }
         
       return;
 
@@ -6881,8 +7130,7 @@ void Sema::ActOnUninitializedDecl(Decl *RealDecl,
       = InitializationKind::CreateDefault(Var->getLocation());
     
     InitializationSequence InitSeq(*this, Entity, Kind, 0, 0);
-    ExprResult Init = InitSeq.Perform(*this, Entity, Kind,
-                                      MultiExprArg(*this, 0, 0));
+    ExprResult Init = InitSeq.Perform(*this, Entity, Kind, MultiExprArg());
     if (Init.isInvalid())
       Var->setInvalidDecl();
     else if (Init.get()) {
@@ -6957,11 +7205,22 @@ void Sema::CheckCompleteVariableDeclaration(VarDecl *var) {
     }
   }
 
+  if (var->isThisDeclarationADefinition() &&
+      var->getLinkage() == ExternalLinkage) {
+    // Find a previous declaration that's not a definition.
+    VarDecl *prev = var->getPreviousDecl();
+    while (prev && prev->isThisDeclarationADefinition())
+      prev = prev->getPreviousDecl();
+
+    if (!prev)
+      Diag(var->getLocation(), diag::warn_missing_variable_declarations) << var;
+  }
+
   // All the following checks are C++ only.
   if (!getLangOpts().CPlusPlus) return;
 
-  QualType baseType = Context.getBaseElementType(var->getType());
-  if (baseType->isDependentType()) return;
+  QualType type = var->getType();
+  if (type->isDependentType()) return;
 
   // __block variables might require us to capture a copy-initializer.
   if (var->hasAttr<BlocksAttr>()) {
@@ -6970,8 +7229,6 @@ void Sema::CheckCompleteVariableDeclaration(VarDecl *var) {
 
     // Regardless, we don't want to ignore array nesting when
     // constructing this copy.
-    QualType type = var->getType();
-
     if (type->isStructureOrClassType()) {
       SourceLocation poi = var->getLocation();
       Expr *varRef =new (Context) DeclRefExpr(var, false, type, VK_LValue, poi);
@@ -6989,8 +7246,10 @@ void Sema::CheckCompleteVariableDeclaration(VarDecl *var) {
 
   Expr *Init = var->getInit();
   bool IsGlobal = var->hasGlobalStorage() && !var->isStaticLocal();
+  QualType baseType = Context.getBaseElementType(type);
 
-  if (!var->getDeclContext()->isDependentContext() && Init) {
+  if (!var->getDeclContext()->isDependentContext() &&
+      Init && !Init->isValueDependent()) {
     if (IsGlobal && !var->isConstexpr() &&
         getDiagnostics().getDiagnosticLevel(diag::warn_global_constructor,
                                             var->getLocation())
@@ -7178,7 +7437,7 @@ void Sema::ActOnDocumentableDecls(Decl **Group, unsigned NumDecls) {
     // the lookahead in the lexer: we've consumed the semicolon and looked
     // ahead through comments.
     for (unsigned i = 0; i != NumDecls; ++i)
-      Context.getCommentForDecl(Group[i]);
+      Context.getCommentForDecl(Group[i], &PP);
   }
 }
 
@@ -7450,6 +7709,9 @@ void Sema::ActOnFinishKNRParamDeclarations(Scope *S, Declarator &D,
         unsigned DiagID; // unused
         DS.SetTypeSpecType(DeclSpec::TST_int, FTI.ArgInfo[i].IdentLoc,
                            PrevSpec, DiagID);
+        // Use the identifier location for the type source range.
+        DS.SetRangeStart(FTI.ArgInfo[i].IdentLoc);
+        DS.SetRangeEnd(FTI.ArgInfo[i].IdentLoc);
         Declarator ParamD(DS, Declarator::KNRTypeListContext);
         ParamD.SetIdentifier(FTI.ArgInfo[i].Ident, FTI.ArgInfo[i].IdentLoc);
         FTI.ArgInfo[i].Param = ActOnParamDeclarator(S, ParamD);
@@ -7464,8 +7726,7 @@ Decl *Sema::ActOnStartOfFunctionDef(Scope *FnBodyScope, Declarator &D) {
   Scope *ParentScope = FnBodyScope->getParent();
 
   D.setFunctionDefinitionKind(FDK_Definition);
-  Decl *DP = HandleDeclarator(ParentScope, D,
-                              MultiTemplateParamsArg(*this));
+  Decl *DP = HandleDeclarator(ParentScope, D, MultiTemplateParamsArg());
   return ActOnStartOfFunctionDef(FnBodyScope, DP);
 }
 
@@ -7707,7 +7968,7 @@ void Sema::computeNRVO(Stmt *Body, FunctionScopeInfo *Scope) {
 }
 
 Decl *Sema::ActOnFinishFunctionBody(Decl *D, Stmt *BodyArg) {
-  return ActOnFinishFunctionBody(D, move(BodyArg), false);
+  return ActOnFinishFunctionBody(D, BodyArg, false);
 }
 
 Decl *Sema::ActOnFinishFunctionBody(Decl *dcl, Stmt *Body,
@@ -7765,22 +8026,16 @@ Decl *Sema::ActOnFinishFunctionBody(Decl *dcl, Stmt *Body,
       if (Body)
         computeNRVO(Body, getCurFunction());
     }
-    if (getCurFunction()->ObjCShouldCallSuperDealloc) {
-      Diag(MD->getLocEnd(), diag::warn_objc_missing_super_dealloc);
-      getCurFunction()->ObjCShouldCallSuperDealloc = false;
-    }
-    if (getCurFunction()->ObjCShouldCallSuperFinalize) {
-      Diag(MD->getLocEnd(), diag::warn_objc_missing_super_finalize);
-      getCurFunction()->ObjCShouldCallSuperFinalize = false;
+    if (getCurFunction()->ObjCShouldCallSuper) {
+      Diag(MD->getLocEnd(), diag::warn_objc_missing_super_call)
+        << MD->getSelector().getAsString();
+      getCurFunction()->ObjCShouldCallSuper = false;
     }
   } else {
     return 0;
   }
 
-  assert(!getCurFunction()->ObjCShouldCallSuperDealloc &&
-         "This should only be set for ObjC methods, which should have been "
-         "handled in the block above.");
-  assert(!getCurFunction()->ObjCShouldCallSuperFinalize &&
+  assert(!getCurFunction()->ObjCShouldCallSuper &&
          "This should only be set for ObjC methods, which should have been "
          "handled in the block above.");
 
@@ -7916,13 +8171,28 @@ NamedDecl *Sema::ImplicitlyDefineFunction(SourceLocation Loc,
   bool Error = DS.SetTypeSpecType(DeclSpec::TST_int, Loc, Dummy, DiagID);
   (void)Error; // Silence warning.
   assert(!Error && "Error setting up implicit decl!");
+  SourceLocation NoLoc;
   Declarator D(DS, Declarator::BlockContext);
-  D.AddTypeInfo(DeclaratorChunk::getFunction(false, false, false,
-                                             SourceLocation(), 0, 0, 0, true, 
-                                             SourceLocation(), SourceLocation(),
-                                             SourceLocation(), SourceLocation(),
-                                             EST_None, SourceLocation(),
-                                             0, 0, 0, 0, Loc, Loc, D),
+  D.AddTypeInfo(DeclaratorChunk::getFunction(/*HasProto=*/false,
+                                             /*IsAmbiguous=*/false,
+                                             /*RParenLoc=*/NoLoc,
+                                             /*ArgInfo=*/0,
+                                             /*NumArgs=*/0,
+                                             /*EllipsisLoc=*/NoLoc,
+                                             /*RParenLoc=*/NoLoc,
+                                             /*TypeQuals=*/0,
+                                             /*RefQualifierIsLvalueRef=*/true,
+                                             /*RefQualifierLoc=*/NoLoc,
+                                             /*ConstQualifierLoc=*/NoLoc,
+                                             /*VolatileQualifierLoc=*/NoLoc,
+                                             /*MutableLoc=*/NoLoc,
+                                             EST_None,
+                                             /*ESpecLoc=*/NoLoc,
+                                             /*Exceptions=*/0,
+                                             /*ExceptionRanges=*/0,
+                                             /*NumExceptions=*/0,
+                                             /*NoexceptExpr=*/0,
+                                             Loc, Loc, D),
                 DS.getAttributes(),
                 SourceLocation());
   D.SetIdentifier(&II, Loc);
@@ -8071,6 +8341,7 @@ TypedefDecl *Sema::ParseTypedefDecl(Scope *S, Declarator &D, QualType T,
   switch (D.getDeclSpec().getTypeSpecType()) {
   case TST_enum:
   case TST_struct:
+  case TST_interface:
   case TST_union:
   case TST_class: {
     TagDecl *tagFromDeclSpec = cast<TagDecl>(D.getDeclSpec().getRepAsDecl());
@@ -8146,6 +8417,29 @@ bool Sema::CheckEnumRedeclaration(SourceLocation EnumLoc, bool IsScoped,
   return false;
 }
 
+/// \brief Get diagnostic %select index for tag kind for
+/// redeclaration diagnostic message.
+/// WARNING: Indexes apply to particular diagnostics only!
+///
+/// \returns diagnostic %select index.
+static unsigned getRedeclDiagFromTagKind(TagTypeKind Tag) {
+  switch (Tag) {
+  case TTK_Struct: return 0;
+  case TTK_Interface: return 1;
+  case TTK_Class:  return 2;
+  default: llvm_unreachable("Invalid tag kind for redecl diagnostic!");
+  }
+}
+
+/// \brief Determine if tag kind is a class-key compatible with
+/// class for redeclaration (class, struct, or __interface).
+///
+/// \returns true iff the tag kind is compatible.
+static bool isClassCompatTagKind(TagTypeKind Tag)
+{
+  return Tag == TTK_Struct || Tag == TTK_Class || Tag == TTK_Interface;
+}
+
 /// \brief Determine whether a tag with a given kind is acceptable
 /// as a redeclaration of the given tag declaration.
 ///
@@ -8168,12 +8462,11 @@ bool Sema::isAcceptableTagRedeclaration(const TagDecl *Previous,
   //   struct class-key shall be used to refer to a class (clause 9)
   //   declared using the class or struct class-key.
   TagTypeKind OldTag = Previous->getTagKind();
-  if (!isDefinition || (NewTag != TTK_Class && NewTag != TTK_Struct))
+  if (!isDefinition || !isClassCompatTagKind(NewTag))
     if (OldTag == NewTag)
       return true;
 
-  if ((OldTag == TTK_Struct || OldTag == TTK_Class) &&
-      (NewTag == TTK_Struct || NewTag == TTK_Class)) {
+  if (isClassCompatTagKind(OldTag) && isClassCompatTagKind(NewTag)) {
     // Warn about the struct/class tag mismatch.
     bool isTemplate = false;
     if (const CXXRecordDecl *Record = dyn_cast<CXXRecordDecl>(Previous))
@@ -8183,7 +8476,8 @@ bool Sema::isAcceptableTagRedeclaration(const TagDecl *Previous,
       // In a template instantiation, do not offer fix-its for tag mismatches
       // since they usually mess up the template instead of fixing the problem.
       Diag(NewTagLoc, diag::warn_struct_class_tag_mismatch)
-        << (NewTag == TTK_Class) << isTemplate << &Name;
+        << getRedeclDiagFromTagKind(NewTag) << isTemplate << &Name
+        << getRedeclDiagFromTagKind(OldTag);
       return true;
     }
 
@@ -8202,13 +8496,13 @@ bool Sema::isAcceptableTagRedeclaration(const TagDecl *Previous,
           if (!previousMismatch) {
             previousMismatch = true;
             Diag(NewTagLoc, diag::warn_struct_class_previous_tag_mismatch)
-              << (NewTag == TTK_Class) << isTemplate << &Name;
+              << getRedeclDiagFromTagKind(NewTag) << isTemplate << &Name
+              << getRedeclDiagFromTagKind(I->getTagKind());
           }
           Diag(I->getInnerLocStart(), diag::note_struct_class_suggestion)
-            << (NewTag == TTK_Class)
+            << getRedeclDiagFromTagKind(NewTag)
             << FixItHint::CreateReplacement(I->getInnerLocStart(),
-                                            NewTag == TTK_Class?
-                                            "class" : "struct");
+                 TypeWithKeyword::getTagTypeKindName(NewTag));
         }
       }
       return true;
@@ -8224,16 +8518,16 @@ bool Sema::isAcceptableTagRedeclaration(const TagDecl *Previous,
     }
 
     Diag(NewTagLoc, diag::warn_struct_class_tag_mismatch)
-      << (NewTag == TTK_Class)
-      << isTemplate << &Name;
+      << getRedeclDiagFromTagKind(NewTag) << isTemplate << &Name
+      << getRedeclDiagFromTagKind(OldTag);
     Diag(Redecl->getLocation(), diag::note_previous_use);
 
     // If there is a previous defintion, suggest a fix-it.
     if (Previous->getDefinition()) {
         Diag(NewTagLoc, diag::note_struct_class_suggestion)
-          << (Redecl->getTagKind() == TTK_Class)
+          << getRedeclDiagFromTagKind(Redecl->getTagKind())
           << FixItHint::CreateReplacement(SourceRange(NewTagLoc),
-                        Redecl->getTagKind() == TTK_Class? "class" : "struct");
+               TypeWithKeyword::getTagTypeKindName(Redecl->getTagKind()));
     }
 
     return true;
@@ -8276,7 +8570,7 @@ Decl *Sema::ActOnTag(Scope *S, unsigned TagSpec, TagUseKind TUK,
       (SS.isNotEmpty() && TUK != TUK_Reference)) {
     if (TemplateParameterList *TemplateParams
           = MatchTemplateParametersToScopeSpecifier(KWLoc, NameLoc, SS,
-                                                TemplateParameterLists.get(),
+                                                TemplateParameterLists.data(),
                                                 TemplateParameterLists.size(),
                                                     TUK == TUK_Friend,
                                                     isExplicitSpecialization,
@@ -8293,8 +8587,8 @@ Decl *Sema::ActOnTag(Scope *S, unsigned TagSpec, TagUseKind TUK,
                                                SS, Name, NameLoc, Attr,
                                                TemplateParams, AS,
                                                ModulePrivateLoc,
-                                           TemplateParameterLists.size() - 1,
-                 (TemplateParameterList**) TemplateParameterLists.release());
+                                               TemplateParameterLists.size()-1,
+                                               TemplateParameterLists.data());
         return Result.get();
       } else {
         // The "template<>" header is extraneous.
@@ -8843,7 +9137,7 @@ CreateNewDecl:
       if (TemplateParameterLists.size() > 0) {
         New->setTemplateParameterListsInfo(Context,
                                            TemplateParameterLists.size(),
-                    (TemplateParameterList**) TemplateParameterLists.release());
+                                           TemplateParameterLists.data());
       }
     }
     else
@@ -9298,12 +9592,15 @@ FieldDecl *Sema::CheckFieldDecl(DeclarationName Name, QualType T,
   if (!InvalidDecl && T->isVariablyModifiedType()) {
     bool SizeIsNegative;
     llvm::APSInt Oversized;
-    QualType FixedTy = TryToFixInvalidVariablyModifiedType(T, Context,
-                                                           SizeIsNegative,
-                                                           Oversized);
-    if (!FixedTy.isNull()) {
+
+    TypeSourceInfo *FixedTInfo =
+      TryToFixInvalidVariablyModifiedTypeSourceInfo(TInfo, Context,
+                                                    SizeIsNegative,
+                                                    Oversized);
+    if (FixedTInfo) {
       Diag(Loc, diag::warn_illegal_constant_array_size);
-      T = FixedTy;
+      TInfo = FixedTInfo;
+      T = FixedTInfo->getType();
     } else {
       if (SizeIsNegative)
         Diag(Loc, diag::err_typecheck_negative_array_size);
@@ -9460,12 +9757,12 @@ bool Sema::CheckNontrivialField(FieldDecl *FD) {
   return false;
 }
 
-/// If the given constructor is user-provided, produce a diagnostic explaining
+/// If the given constructor is user-declared, produce a diagnostic explaining
 /// that it makes the class non-trivial.
-static bool DiagnoseNontrivialUserProvidedCtor(Sema &S, QualType QT,
+static bool diagnoseNonTrivialUserDeclaredCtor(Sema &S, QualType QT,
                                                CXXConstructorDecl *CD,
                                                Sema::CXXSpecialMember CSM) {
-  if (!CD->isUserProvided())
+  if (CD->isImplicit())
     return false;
 
   SourceLocation CtorLoc = CD->getLocation();
@@ -9488,17 +9785,17 @@ void Sema::DiagnoseNontrivial(const RecordType* T, CXXSpecialMember member) {
     if (RD->hasUserDeclaredConstructor()) {
       typedef CXXRecordDecl::ctor_iterator ctor_iter;
       for (ctor_iter CI = RD->ctor_begin(), CE = RD->ctor_end(); CI != CE; ++CI)
-        if (DiagnoseNontrivialUserProvidedCtor(*this, QT, *CI, member))
+        if (diagnoseNonTrivialUserDeclaredCtor(*this, QT, *CI, member))
           return;
 
-      // No user-provided constructors; look for constructor templates.
+      // No user-delcared constructors; look for constructor templates.
       typedef CXXRecordDecl::specific_decl_iterator<FunctionTemplateDecl>
           tmpl_iter;
       for (tmpl_iter TI(RD->decls_begin()), TE(RD->decls_end());
            TI != TE; ++TI) {
         CXXConstructorDecl *CD =
             dyn_cast<CXXConstructorDecl>(TI->getTemplatedDecl());
-        if (CD && DiagnoseNontrivialUserProvidedCtor(*this, QT, CD, member))
+        if (CD && diagnoseNonTrivialUserDeclaredCtor(*this, QT, CD, member))
           return;
       }
     }
@@ -10025,42 +10322,6 @@ void Sema::ActOnFields(Scope* S,
           Convs->setAccess(I, (*I)->getAccess());
         
         if (!CXXRecord->isDependentType()) {
-          // Objective-C Automatic Reference Counting:
-          //   If a class has a non-static data member of Objective-C pointer
-          //   type (or array thereof), it is a non-POD type and its
-          //   default constructor (if any), copy constructor, copy assignment
-          //   operator, and destructor are non-trivial.
-          //
-          // This rule is also handled by CXXRecordDecl::completeDefinition(). 
-          // However, here we check whether this particular class is only 
-          // non-POD because of the presence of an Objective-C pointer member. 
-          // If so, objects of this type cannot be shared between code compiled 
-          // with ARC and code compiled with manual retain/release.
-          if (getLangOpts().ObjCAutoRefCount &&
-              CXXRecord->hasObjectMember() && 
-              CXXRecord->getLinkage() == ExternalLinkage) {
-            if (CXXRecord->isPOD()) {
-              Diag(CXXRecord->getLocation(), 
-                   diag::warn_arc_non_pod_class_with_object_member)
-               << CXXRecord;
-            } else {
-              // FIXME: Fix-Its would be nice here, but finding a good location
-              // for them is going to be tricky.
-              if (CXXRecord->hasTrivialCopyConstructor())
-                Diag(CXXRecord->getLocation(), 
-                     diag::warn_arc_trivial_member_function_with_object_member)
-                  << CXXRecord << 0;
-              if (CXXRecord->hasTrivialCopyAssignment())
-                Diag(CXXRecord->getLocation(), 
-                     diag::warn_arc_trivial_member_function_with_object_member)
-                << CXXRecord << 1;
-              if (CXXRecord->hasTrivialDestructor())
-                Diag(CXXRecord->getLocation(), 
-                     diag::warn_arc_trivial_member_function_with_object_member)
-                << CXXRecord << 2;
-            }
-          }
-          
           // Adjust user-defined destructor exception spec.
           if (getLangOpts().CPlusPlus0x &&
               CXXRecord->hasUserDeclaredDestructor())
@@ -10092,7 +10353,7 @@ void Sema::ActOnFields(Scope* S,
                 //   class subobject has more than one final overrider the
                 //   program is ill-formed.
                 Diag(Record->getLocation(), diag::err_multiple_final_overriders)
-                  << (NamedDecl *)M->first << Record;
+                  << (const NamedDecl *)M->first << Record;
                 Diag(M->first->getLocation(), 
                      diag::note_overridden_virtual_function);
                 for (OverridingMethods::overriding_iterator 
@@ -10100,7 +10361,7 @@ void Sema::ActOnFields(Scope* S,
                        OMEnd = SO->second.end();
                      OM != OMEnd; ++OM)
                   Diag(OM->Method->getLocation(), diag::note_final_overrider)
-                    << (NamedDecl *)M->first << OM->Method->getParent();
+                    << (const NamedDecl *)M->first << OM->Method->getParent();
                 
                 Record->setInvalidDecl();
               }
@@ -10461,57 +10722,6 @@ Decl *Sema::ActOnEnumConstant(Scope *S, Decl *theEnumDecl, Decl *lastEnumConst,
   return New;
 }
 
-// Emits a warning if every element in the enum is the same value and if
-// every element is initialized with a integer or boolean literal.
-static void CheckForUniqueEnumValues(Sema &S, Decl **Elements,
-                                     unsigned NumElements, EnumDecl *Enum,
-                                     QualType EnumType) {
-  if (S.Diags.getDiagnosticLevel(diag::warn_identical_enum_values,
-                                 Enum->getLocation()) ==
-      DiagnosticsEngine::Ignored)
-    return;
-
-  if (NumElements < 2)
-    return;
-
-  if (!Enum->getIdentifier())
-    return;
-
-  llvm::APSInt FirstVal;
-
-  for (unsigned i = 0; i != NumElements; ++i) {
-    EnumConstantDecl *ECD = cast_or_null<EnumConstantDecl>(Elements[i]);
-    if (!ECD)
-      return;
-
-    Expr *InitExpr = ECD->getInitExpr();
-    if (!InitExpr)
-      return;
-    InitExpr = InitExpr->IgnoreImpCasts();
-    if (!isa<IntegerLiteral>(InitExpr) && !isa<CXXBoolLiteralExpr>(InitExpr))
-      return;
-
-    if (i == 0) {
-      FirstVal = ECD->getInitVal();
-      continue;
-    }
-
-    if (!llvm::APSInt::isSameValue(FirstVal, ECD->getInitVal()))
-      return;
-  }
-
-  S.Diag(Enum->getLocation(), diag::warn_identical_enum_values)
-      << EnumType << FirstVal.toString(10)
-      << Enum->getSourceRange();
-
-  EnumConstantDecl *Last = cast<EnumConstantDecl>(Elements[NumElements - 1]),
-                   *Next = cast<EnumConstantDecl>(Elements[NumElements - 2]);
-
-  S.Diag(Last->getLocation(), diag::note_identical_enum_values)
-    << FixItHint::CreateReplacement(Last->getInitExpr()->getSourceRange(),
-                                    Next->getName());
-}
-
 void Sema::ActOnEnumBody(SourceLocation EnumLoc, SourceLocation LBraceLoc,
                          SourceLocation RBraceLoc, Decl *EnumDeclX,
                          Decl **Elements, unsigned NumElements,
@@ -10734,8 +10944,6 @@ void Sema::ActOnEnumBody(SourceLocation EnumLoc, SourceLocation LBraceLoc,
   // it needs to go into the function scope.
   if (InFunctionDeclarator)
     DeclsInPrototypeScope.push_back(Enum);
-
-  CheckForUniqueEnumValues(*this, Elements, NumElements, Enum, EnumType);
 }
 
 Decl *Sema::ActOnFileScopeAsmDecl(Expr *expr,
@@ -10834,10 +11042,6 @@ Decl *Sema::getObjCDeclContext() const {
 }
 
 AvailabilityResult Sema::getCurContextAvailability() const {
-  const Decl *D = cast<Decl>(getCurLexicalContext());
-  // A category implicitly has the availability of the interface.
-  if (const ObjCCategoryDecl *CatD = dyn_cast<ObjCCategoryDecl>(D))
-    D = CatD->getClassInterface();
-  
+  const Decl *D = cast<Decl>(getCurObjCLexicalContext());
   return D->getAvailability();
 }
diff --git a/lib/Sema/SemaDeclAttr.cpp b/lib/Sema/SemaDeclAttr.cpp
index caa7b2f65a9d..e326a20c87d0 100644
--- a/lib/Sema/SemaDeclAttr.cpp
+++ b/lib/Sema/SemaDeclAttr.cpp
@@ -415,14 +415,19 @@ static void checkAttrArgsAreLockableObjs(Sema &S, Decl *D,
     }
 
     if (StringLiteral *StrLit = dyn_cast<StringLiteral>(ArgExp)) {
-      // Ignore empty strings without warnings
-      if (StrLit->getLength() == 0)
+      if (StrLit->getLength() == 0 ||
+          StrLit->getString() == StringRef("*")) {
+        // Pass empty strings to the analyzer without warnings.
+        // Treat "*" as the universal lock.
+        Args.push_back(ArgExp);
         continue;
+      }
 
       // We allow constant strings to be used as a placeholder for expressions
       // that are not valid C++ syntax, but warn that they are ignored.
       S.Diag(Attr.getLoc(), diag::warn_thread_attribute_ignored) <<
         Attr.getName();
+      Args.push_back(ArgExp);
       continue;
     }
 
@@ -859,7 +864,6 @@ static void handleLockReturnedAttr(Sema &S, Decl *D,
 
   if (!checkAttributeNumArgs(S, Attr, 1))
     return;
-  Expr *Arg = Attr.getArg(0);
 
   if (!isa<FunctionDecl>(D) && !isa<FunctionTemplateDecl>(D)) {
     S.Diag(Attr.getLoc(), diag::warn_thread_attribute_wrong_decl_type)
@@ -867,9 +871,6 @@ static void handleLockReturnedAttr(Sema &S, Decl *D,
     return;
   }
 
-  if (Arg->isTypeDependent())
-    return;
-
   // check that the argument is lockable object
   SmallVector<Expr*, 1> Args;
   checkAttrArgsAreLockableObjs(S, D, Attr, Args);
@@ -962,7 +963,8 @@ static void handlePackedAttr(Sema &S, Decl *D, const AttributeList &Attr) {
   else if (FieldDecl *FD = dyn_cast<FieldDecl>(D)) {
     // If the alignment is less than or equal to 8 bits, the packed attribute
     // has no effect.
-    if (!FD->getType()->isIncompleteType() &&
+    if (!FD->getType()->isDependentType() &&
+        !FD->getType()->isIncompleteType() &&
         S.Context.getTypeAlign(FD->getType()) <= 8)
       S.Diag(Attr.getLoc(), diag::warn_attribute_ignored_for_field_of_type)
         << Attr.getName() << FD->getType();
@@ -973,8 +975,8 @@ static void handlePackedAttr(Sema &S, Decl *D, const AttributeList &Attr) {
 }
 
 static void handleMsStructAttr(Sema &S, Decl *D, const AttributeList &Attr) {
-  if (TagDecl *TD = dyn_cast<TagDecl>(D))
-    TD->addAttr(::new (S.Context) MsStructAttr(Attr.getRange(), S.Context));
+  if (RecordDecl *RD = dyn_cast<RecordDecl>(D))
+    RD->addAttr(::new (S.Context) MsStructAttr(Attr.getRange(), S.Context));
   else
     S.Diag(Attr.getLoc(), diag::warn_attribute_ignored) << Attr.getName();
 }
@@ -1522,6 +1524,20 @@ static void handleAliasAttr(Sema &S, Decl *D, const AttributeList &Attr) {
                                          Str->getString()));
 }
 
+static void handleMinSizeAttr(Sema &S, Decl *D, const AttributeList &Attr) {
+  // Check the attribute arguments.
+  if (!checkAttributeNumArgs(S, Attr, 0))
+    return;
+
+  if (!isa<FunctionDecl>(D) && !isa<ObjCMethodDecl>(D)) {
+    S.Diag(Attr.getLoc(), diag::err_attribute_wrong_decl_type)
+      << Attr.getName() << ExpectedFunctionOrMethod;
+    return;
+  }
+
+  D->addAttr(::new (S.Context) MinSizeAttr(Attr.getRange(), S.Context));
+}
+
 static void handleColdAttr(Sema &S, Decl *D, const AttributeList &Attr) {
   // Check the attribute arguments.
   if (!checkAttributeNumArgs(S, Attr, 0))
@@ -2268,16 +2284,14 @@ static void handleObjCNSObject(Sema &S, Decl *D, const AttributeList &Attr) {
   }
   if (TypedefNameDecl *TD = dyn_cast<TypedefNameDecl>(D)) {
     QualType T = TD->getUnderlyingType();
-    if (!T->isPointerType() ||
-        !T->getAs<PointerType>()->getPointeeType()->isRecordType()) {
+    if (!T->isCARCBridgableType()) {
       S.Diag(TD->getLocation(), diag::err_nsobject_attribute);
       return;
     }
   }
   else if (ObjCPropertyDecl *PD = dyn_cast<ObjCPropertyDecl>(D)) {
     QualType T = PD->getType();
-    if (!T->isPointerType() ||
-        !T->getAs<PointerType>()->getPointeeType()->isRecordType()) {
+    if (!T->isCARCBridgableType()) {
       S.Diag(PD->getLocation(), diag::err_nsobject_attribute);
       return;
     }
@@ -3583,7 +3597,12 @@ static void handleCallConvAttr(Sema &S, Decl *D, const AttributeList &Attr) {
     }
 
     D->addAttr(::new (S.Context) PcsAttr(Attr.getRange(), S.Context, PCS));
+    return;
   }
+  case AttributeList::AT_PnaclCall:
+    D->addAttr(::new (S.Context) PnaclCallAttr(Attr.getRange(), S.Context));
+    return;
+
   default:
     llvm_unreachable("unexpected attribute kind");
   }
@@ -3636,9 +3655,17 @@ bool Sema::CheckCallingConvAttr(const AttributeList &attr, CallingConv &CC) {
     Diag(attr.getLoc(), diag::err_invalid_pcs);
     return true;
   }
+  case AttributeList::AT_PnaclCall: CC = CC_PnaclCall; break;
   default: llvm_unreachable("unexpected attribute kind");
   }
 
+  const TargetInfo &TI = Context.getTargetInfo();
+  TargetInfo::CallingConvCheckResult A = TI.checkCallingConvention(CC);
+  if (A == TargetInfo::CCCR_Warning) {
+    Diag(attr.getLoc(), diag::warn_cconv_ignored) << attr.getName();
+    CC = TI.getDefaultCallingConv();
+  }
+
   return false;
 }
 
@@ -3878,11 +3905,11 @@ static void handleNSReturnsRetainedAttr(Sema &S, Decl *D,
 
   if (ObjCMethodDecl *MD = dyn_cast<ObjCMethodDecl>(D))
     returnType = MD->getResultType();
-  else if (ObjCPropertyDecl *PD = dyn_cast<ObjCPropertyDecl>(D))
-    returnType = PD->getType();
   else if (S.getLangOpts().ObjCAutoRefCount && hasDeclarator(D) &&
            (Attr.getKind() == AttributeList::AT_NSReturnsRetained))
     return; // ignore: was handled as a type attribute
+  else if (ObjCPropertyDecl *PD = dyn_cast<ObjCPropertyDecl>(D))
+    returnType = PD->getType();
   else if (FunctionDecl *FD = dyn_cast<FunctionDecl>(D))
     returnType = FD->getResultType();
   else {
@@ -3971,6 +3998,33 @@ static void handleObjCReturnsInnerPointerAttr(Sema &S, Decl *D,
     ::new (S.Context) ObjCReturnsInnerPointerAttr(attr.getRange(), S.Context));
 }
 
+static void handleObjCRequiresSuperAttr(Sema &S, Decl *D,
+                                        const AttributeList &attr) {
+  SourceLocation loc = attr.getLoc();
+  ObjCMethodDecl *method = dyn_cast<ObjCMethodDecl>(D);
+  
+  if (!method) {
+   S.Diag(D->getLocStart(), diag::err_attribute_wrong_decl_type)
+   << SourceRange(loc, loc) << attr.getName() << ExpectedMethod;
+    return;
+  }
+  DeclContext *DC = method->getDeclContext();
+  if (const ObjCProtocolDecl *PDecl = dyn_cast_or_null<ObjCProtocolDecl>(DC)) {
+    S.Diag(D->getLocStart(), diag::warn_objc_requires_super_protocol)
+    << attr.getName() << 0;
+    S.Diag(PDecl->getLocation(), diag::note_protocol_decl);
+    return;
+  }
+  if (method->getMethodFamily() == OMF_dealloc) {
+    S.Diag(D->getLocStart(), diag::warn_objc_requires_super_protocol)
+    << attr.getName() << 1;
+    return;
+  }
+  
+  method->addAttr(
+    ::new (S.Context) ObjCRequiresSuperAttr(attr.getRange(), S.Context));
+}
+
 /// Handle cf_audited_transfer and cf_unknown_transfer.
 static void handleCFTransferAttr(Sema &S, Decl *D, const AttributeList &A) {
   if (!isa<FunctionDecl>(D)) {
@@ -4149,19 +4203,21 @@ static void handleUuidAttr(Sema &S, Decl *D, const AttributeList &Attr) {
 }
 
 static void handleInheritanceAttr(Sema &S, Decl *D, const AttributeList &Attr) {
-  if (S.LangOpts.MicrosoftExt) {
-    AttributeList::Kind Kind = Attr.getKind();
-    if (Kind == AttributeList::AT_SingleInheritance)
-      D->addAttr(
-          ::new (S.Context) SingleInheritanceAttr(Attr.getRange(), S.Context));
-    else if (Kind == AttributeList::AT_MultipleInheritance)
-      D->addAttr(
-          ::new (S.Context) MultipleInheritanceAttr(Attr.getRange(), S.Context));
-    else if (Kind == AttributeList::AT_VirtualInheritance)
-      D->addAttr(
-          ::new (S.Context) VirtualInheritanceAttr(Attr.getRange(), S.Context));
-  } else
+  if (!S.LangOpts.MicrosoftExt) {
     S.Diag(Attr.getLoc(), diag::warn_attribute_ignored) << Attr.getName();
+    return;
+  }
+
+  AttributeList::Kind Kind = Attr.getKind();
+  if (Kind == AttributeList::AT_SingleInheritance)
+    D->addAttr(
+        ::new (S.Context) SingleInheritanceAttr(Attr.getRange(), S.Context));
+  else if (Kind == AttributeList::AT_MultipleInheritance)
+    D->addAttr(
+        ::new (S.Context) MultipleInheritanceAttr(Attr.getRange(), S.Context));
+  else if (Kind == AttributeList::AT_VirtualInheritance)
+    D->addAttr(
+        ::new (S.Context) VirtualInheritanceAttr(Attr.getRange(), S.Context));
 }
 
 static void handlePortabilityAttr(Sema &S, Decl *D, const AttributeList &Attr) {
@@ -4246,6 +4302,9 @@ static void ProcessInheritableDeclAttr(Sema &S, Scope *scope, Decl *D,
   case AttributeList::AT_ExtVectorType:
     handleExtVectorTypeAttr(S, scope, D, Attr);
     break;
+  case AttributeList::AT_MinSize:
+    handleMinSizeAttr(S, D, Attr);
+    break;
   case AttributeList::AT_Format:      handleFormatAttr      (S, D, Attr); break;
   case AttributeList::AT_FormatArg:   handleFormatArgAttr   (S, D, Attr); break;
   case AttributeList::AT_CUDAGlobal:  handleGlobalAttr      (S, D, Attr); break;
@@ -4278,6 +4337,9 @@ static void ProcessInheritableDeclAttr(Sema &S, Scope *scope, Decl *D,
   case AttributeList::AT_ObjCReturnsInnerPointer:
     handleObjCReturnsInnerPointerAttr(S, D, Attr); break;
 
+  case AttributeList::AT_ObjCRequiresSuper:
+      handleObjCRequiresSuperAttr(S, D, Attr); break;
+      
   case AttributeList::AT_NSBridged:
     handleNSBridgedAttr(S, scope, D, Attr); break;
 
@@ -4360,6 +4422,7 @@ static void ProcessInheritableDeclAttr(Sema &S, Scope *scope, Decl *D,
   case AttributeList::AT_ThisCall:
   case AttributeList::AT_Pascal:
   case AttributeList::AT_Pcs:
+  case AttributeList::AT_PnaclCall:
     handleCallConvAttr(S, D, Attr);
     break;
   case AttributeList::AT_OpenCLKernel:
@@ -4774,18 +4837,25 @@ static bool isDeclDeprecated(Decl *D) {
 static void
 DoEmitDeprecationWarning(Sema &S, const NamedDecl *D, StringRef Message,
                          SourceLocation Loc,
-                         const ObjCInterfaceDecl *UnknownObjCClass) {
+                         const ObjCInterfaceDecl *UnknownObjCClass,
+                         const ObjCPropertyDecl *ObjCPropery) {
   DeclarationName Name = D->getDeclName();
   if (!Message.empty()) {
     S.Diag(Loc, diag::warn_deprecated_message) << Name << Message;
     S.Diag(D->getLocation(),
            isa<ObjCMethodDecl>(D) ? diag::note_method_declared_at
                                   : diag::note_previous_decl) << Name;
+    if (ObjCPropery)
+      S.Diag(ObjCPropery->getLocation(), diag::note_property_attribute)
+        << ObjCPropery->getDeclName() << 0;
   } else if (!UnknownObjCClass) {
     S.Diag(Loc, diag::warn_deprecated) << D->getDeclName();
     S.Diag(D->getLocation(),
            isa<ObjCMethodDecl>(D) ? diag::note_method_declared_at
                                   : diag::note_previous_decl) << Name;
+    if (ObjCPropery)
+      S.Diag(ObjCPropery->getLocation(), diag::note_property_attribute)
+        << ObjCPropery->getDeclName() << 0;
   } else {
     S.Diag(Loc, diag::warn_deprecated_fwdclass_message) << Name;
     S.Diag(UnknownObjCClass->getLocation(), diag::note_forward_class);
@@ -4800,16 +4870,19 @@ void Sema::HandleDelayedDeprecationCheck(DelayedDiagnostic &DD,
   DD.Triggered = true;
   DoEmitDeprecationWarning(*this, DD.getDeprecationDecl(),
                            DD.getDeprecationMessage(), DD.Loc,
-                           DD.getUnknownObjCClass());
+                           DD.getUnknownObjCClass(),
+                           DD.getObjCProperty());
 }
 
 void Sema::EmitDeprecationWarning(NamedDecl *D, StringRef Message,
                                   SourceLocation Loc,
-                                  const ObjCInterfaceDecl *UnknownObjCClass) {
+                                  const ObjCInterfaceDecl *UnknownObjCClass,
+                                  const ObjCPropertyDecl  *ObjCProperty) {
   // Delay if we're currently parsing a declaration.
   if (DelayedDiagnostics.shouldDelayDiagnostics()) {
     DelayedDiagnostics.add(DelayedDiagnostic::makeDeprecation(Loc, D, 
                                                               UnknownObjCClass,
+                                                              ObjCProperty,
                                                               Message));
     return;
   }
@@ -4817,5 +4890,5 @@ void Sema::EmitDeprecationWarning(NamedDecl *D, StringRef Message,
   // Otherwise, don't warn if our current context is deprecated.
   if (isDeclDeprecated(cast<Decl>(getCurLexicalContext())))
     return;
-  DoEmitDeprecationWarning(*this, D, Message, Loc, UnknownObjCClass);
+  DoEmitDeprecationWarning(*this, D, Message, Loc, UnknownObjCClass, ObjCProperty);
 }
diff --git a/lib/Sema/SemaDeclCXX.cpp b/lib/Sema/SemaDeclCXX.cpp
index eeac9b8e8d70..16eddf80ae5b 100644
--- a/lib/Sema/SemaDeclCXX.cpp
+++ b/lib/Sema/SemaDeclCXX.cpp
@@ -246,8 +246,7 @@ Sema::SetParamDefaultArgument(ParmVarDecl *Param, Expr *Arg,
   InitializationKind Kind = InitializationKind::CreateCopy(Param->getLocation(),
                                                            EqualLoc);
   InitializationSequence InitSeq(*this, Entity, Kind, &Arg, 1);
-  ExprResult Result = InitSeq.Perform(*this, Entity, Kind,
-                                      MultiExprArg(*this, &Arg, 1));
+  ExprResult Result = InitSeq.Perform(*this, Entity, Kind, Arg);
   if (Result.isInvalid())
     return true;
   Arg = Result.takeAs<Expr>();
@@ -374,10 +373,10 @@ void Sema::CheckExtraCXXDefaultArguments(Declarator &D) {
   }
 }
 
-// MergeCXXFunctionDecl - Merge two declarations of the same C++
-// function, once we already know that they have the same
-// type. Subroutine of MergeFunctionDecl. Returns true if there was an
-// error, false otherwise.
+/// MergeCXXFunctionDecl - Merge two declarations of the same C++
+/// function, once we already know that they have the same
+/// type. Subroutine of MergeFunctionDecl. Returns true if there was an
+/// error, false otherwise.
 bool Sema::MergeCXXFunctionDecl(FunctionDecl *New, FunctionDecl *Old,
                                 Scope *S) {
   bool Invalid = false;
@@ -676,6 +675,20 @@ static bool CheckConstexprParameterTypes(Sema &SemaRef,
   return true;
 }
 
+/// \brief Get diagnostic %select index for tag kind for
+/// record diagnostic message.
+/// WARNING: Indexes apply to particular diagnostics only!
+///
+/// \returns diagnostic %select index.
+static unsigned getRecordDiagFromTagKind(TagTypeKind Tag) {
+  switch (Tag) {
+  case TTK_Struct: return 0;
+  case TTK_Interface: return 1;
+  case TTK_Class:  return 2;
+  default: llvm_unreachable("Invalid tag kind for record diagnostic!");
+  }
+}
+
 // CheckConstexprFunctionDecl - Check whether a function declaration satisfies
 // the requirements of a constexpr function definition or a constexpr
 // constructor definition. If so, return true. If not, produce appropriate
@@ -692,8 +705,8 @@ bool Sema::CheckConstexprFunctionDecl(const FunctionDecl *NewFD) {
     const CXXRecordDecl *RD = MD->getParent();
     if (RD->getNumVBases()) {
       Diag(NewFD->getLocation(), diag::err_constexpr_virtual_base)
-        << isa<CXXConstructorDecl>(NewFD) << RD->isStruct()
-        << RD->getNumVBases();
+        << isa<CXXConstructorDecl>(NewFD)
+        << getRecordDiagFromTagKind(RD->getTagKind()) << RD->getNumVBases();
       for (CXXRecordDecl::base_class_const_iterator I = RD->vbases_begin(),
              E = RD->vbases_end(); I != E; ++I)
         Diag(I->getLocStart(),
@@ -1005,6 +1018,41 @@ bool Sema::isCurrentClassName(const IdentifierInfo &II, Scope *,
     return false;
 }
 
+/// \brief Determine whether the given class is a base class of the given
+/// class, including looking at dependent bases.
+static bool findCircularInheritance(const CXXRecordDecl *Class,
+                                    const CXXRecordDecl *Current) {
+  SmallVector<const CXXRecordDecl*, 8> Queue;
+
+  Class = Class->getCanonicalDecl();
+  while (true) {
+    for (CXXRecordDecl::base_class_const_iterator I = Current->bases_begin(),
+                                                  E = Current->bases_end();
+         I != E; ++I) {
+      CXXRecordDecl *Base = I->getType()->getAsCXXRecordDecl();
+      if (!Base)
+        continue;
+
+      Base = Base->getDefinition();
+      if (!Base)
+        continue;
+
+      if (Base->getCanonicalDecl() == Class)
+        return true;
+
+      Queue.push_back(Base);
+    }
+
+    if (Queue.empty())
+      return false;
+
+    Current = Queue.back();
+    Queue.pop_back();
+  }
+
+  return false;
+}
+
 /// \brief Check the validity of a C++ base class specifier.
 ///
 /// \returns a new CXXBaseSpecifier if well-formed, emits diagnostics
@@ -1031,13 +1079,32 @@ Sema::CheckBaseSpecifier(CXXRecordDecl *Class,
       << TInfo->getTypeLoc().getSourceRange();
     EllipsisLoc = SourceLocation();
   }
-  
-  if (BaseType->isDependentType())
+
+  SourceLocation BaseLoc = TInfo->getTypeLoc().getBeginLoc();
+
+  if (BaseType->isDependentType()) {
+    // Make sure that we don't have circular inheritance among our dependent
+    // bases. For non-dependent bases, the check for completeness below handles
+    // this.
+    if (CXXRecordDecl *BaseDecl = BaseType->getAsCXXRecordDecl()) {
+      if (BaseDecl->getCanonicalDecl() == Class->getCanonicalDecl() ||
+          ((BaseDecl = BaseDecl->getDefinition()) &&
+           findCircularInheritance(Class, BaseDecl))) {
+        Diag(BaseLoc, diag::err_circular_inheritance)
+          << BaseType << Context.getTypeDeclType(Class);
+
+        if (BaseDecl->getCanonicalDecl() != Class->getCanonicalDecl())
+          Diag(BaseDecl->getLocation(), diag::note_previous_decl)
+            << BaseType;
+            
+        return 0;
+      }
+    }
+
     return new (Context) CXXBaseSpecifier(SpecifierRange, Virtual,
                                           Class->getTagKind() == TTK_Class,
                                           Access, TInfo, EllipsisLoc);
-
-  SourceLocation BaseLoc = TInfo->getTypeLoc().getBeginLoc();
+  }
 
   // Base specifiers must be record types.
   if (!BaseType->isRecordType()) {
@@ -1165,10 +1232,21 @@ bool Sema::AttachBaseSpecifiers(CXXRecordDecl *Class, CXXBaseSpecifier **Bases,
       // Okay, add this new base class.
       KnownBase = Bases[idx];
       Bases[NumGoodBases++] = Bases[idx];
-      if (const RecordType *Record = NewBaseType->getAs<RecordType>())
-        if (const CXXRecordDecl *RD = cast<CXXRecordDecl>(Record->getDecl()))
-          if (RD->hasAttr<WeakAttr>())
-            Class->addAttr(::new (Context) WeakAttr(SourceRange(), Context));
+      if (const RecordType *Record = NewBaseType->getAs<RecordType>()) {
+        const CXXRecordDecl *RD = cast<CXXRecordDecl>(Record->getDecl());
+        if (Class->isInterface() &&
+              (!RD->isInterface() ||
+               KnownBase->getAccessSpecifier() != AS_public)) {
+          // The Microsoft extension __interface does not permit bases that
+          // are not themselves public interfaces.
+          Diag(KnownBase->getLocStart(), diag::err_invalid_base_in_interface)
+            << getRecordDiagFromTagKind(RD->getTagKind()) << RD->getName()
+            << RD->getSourceRange();
+          Invalid = true;
+        }
+        if (RD->hasAttr<WeakAttr>())
+          Class->addAttr(::new (Context) WeakAttr(SourceRange(), Context));
+      }
     }
   }
 
@@ -1407,6 +1485,9 @@ bool Sema::ActOnAccessSpecifier(AccessSpecifier Access,
 
 /// CheckOverrideControl - Check C++11 override control semantics.
 void Sema::CheckOverrideControl(Decl *D) {
+  if (D->isInvalidDecl())
+    return;
+
   const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(D);
 
   // Do we know which functions this declaration might be overriding?
@@ -1496,6 +1577,50 @@ Sema::ActOnCXXMemberDeclarator(Scope *S, AccessSpecifier AS, Declarator &D,
 
   bool isFunc = D.isDeclarationOfFunction();
 
+  if (cast<CXXRecordDecl>(CurContext)->isInterface()) {
+    // The Microsoft extension __interface only permits public member functions
+    // and prohibits constructors, destructors, operators, non-public member
+    // functions, static methods and data members.
+    unsigned InvalidDecl;
+    bool ShowDeclName = true;
+    if (!isFunc)
+      InvalidDecl = (DS.getStorageClassSpec() == DeclSpec::SCS_typedef) ? 0 : 1;
+    else if (AS != AS_public)
+      InvalidDecl = 2;
+    else if (DS.getStorageClassSpec() == DeclSpec::SCS_static)
+      InvalidDecl = 3;
+    else switch (Name.getNameKind()) {
+      case DeclarationName::CXXConstructorName:
+        InvalidDecl = 4;
+        ShowDeclName = false;
+        break;
+
+      case DeclarationName::CXXDestructorName:
+        InvalidDecl = 5;
+        ShowDeclName = false;
+        break;
+
+      case DeclarationName::CXXOperatorName:
+      case DeclarationName::CXXConversionFunctionName:
+        InvalidDecl = 6;
+        break;
+
+      default:
+        InvalidDecl = 0;
+        break;
+    }
+
+    if (InvalidDecl) {
+      if (ShowDeclName)
+        Diag(Loc, diag::err_invalid_member_in_interface)
+          << (InvalidDecl-1) << Name;
+      else
+        Diag(Loc, diag::err_invalid_member_in_interface)
+          << (InvalidDecl-1) << "";
+      return 0;
+    }
+  }
+
   // C++ 9.2p6: A member shall not be declared to have automatic storage
   // duration (auto, register) or with the extern storage-class-specifier.
   // C++ 7.1.1p8: The mutable specifier can be applied only to names of class
@@ -1548,7 +1673,7 @@ Sema::ActOnCXXMemberDeclarator(Scope *S, AccessSpecifier AS, Declarator &D,
     // Member field could not be with "template" keyword.
     // So TemplateParameterLists should be empty in this case.
     if (TemplateParameterLists.size()) {
-      TemplateParameterList* TemplateParams = TemplateParameterLists.get()[0];
+      TemplateParameterList* TemplateParams = TemplateParameterLists[0];
       if (TemplateParams->size()) {
         // There is no such thing as a member field template.
         Diag(D.getIdentifierLoc(), diag::err_template_member)
@@ -1588,7 +1713,7 @@ Sema::ActOnCXXMemberDeclarator(Scope *S, AccessSpecifier AS, Declarator &D,
   } else {
     assert(InitStyle == ICIS_NoInit);
 
-    Member = HandleDeclarator(S, D, move(TemplateParameterLists));
+    Member = HandleDeclarator(S, D, TemplateParameterLists);
     if (!Member) {
       return 0;
     }
@@ -1662,6 +1787,99 @@ Sema::ActOnCXXMemberDeclarator(Scope *S, AccessSpecifier AS, Declarator &D,
   return Member;
 }
 
+namespace {
+  class UninitializedFieldVisitor
+      : public EvaluatedExprVisitor<UninitializedFieldVisitor> {
+    Sema &S;
+    ValueDecl *VD;
+  public:
+    typedef EvaluatedExprVisitor<UninitializedFieldVisitor> Inherited;
+    UninitializedFieldVisitor(Sema &S, ValueDecl *VD) : Inherited(S.Context),
+                                                        S(S), VD(VD) {
+    }
+
+    void HandleExpr(Expr *E) {
+      if (!E) return;
+
+      // Expressions like x(x) sometimes lack the surrounding expressions
+      // but need to be checked anyways.
+      HandleValue(E);
+      Visit(E);
+    }
+
+    void HandleValue(Expr *E) {
+      E = E->IgnoreParens();
+
+      if (MemberExpr *ME = dyn_cast<MemberExpr>(E)) {
+        if (isa<EnumConstantDecl>(ME->getMemberDecl()))
+            return;
+        Expr *Base = E;
+        while (isa<MemberExpr>(Base)) {
+          ME = dyn_cast<MemberExpr>(Base);
+          if (VarDecl *VarD = dyn_cast<VarDecl>(ME->getMemberDecl()))
+            if (VarD->hasGlobalStorage())
+              return;
+          Base = ME->getBase();
+        }
+
+        if (VD == ME->getMemberDecl() && isa<CXXThisExpr>(Base)) {
+          unsigned diag = VD->getType()->isReferenceType()
+              ? diag::warn_reference_field_is_uninit
+              : diag::warn_field_is_uninit;
+          S.Diag(ME->getExprLoc(), diag) << ME->getMemberNameInfo().getName();
+          return;
+        }
+      }
+
+      if (ConditionalOperator *CO = dyn_cast<ConditionalOperator>(E)) {
+        HandleValue(CO->getTrueExpr());
+        HandleValue(CO->getFalseExpr());
+        return;
+      }
+
+      if (BinaryConditionalOperator *BCO =
+              dyn_cast<BinaryConditionalOperator>(E)) {
+        HandleValue(BCO->getCommon());
+        HandleValue(BCO->getFalseExpr());
+        return;
+      }
+
+      if (BinaryOperator *BO = dyn_cast<BinaryOperator>(E)) {
+        switch (BO->getOpcode()) {
+        default:
+          return;
+        case(BO_PtrMemD):
+        case(BO_PtrMemI):
+          HandleValue(BO->getLHS());
+          return;
+        case(BO_Comma):
+          HandleValue(BO->getRHS());
+          return;
+        }
+      }
+    }
+
+    void VisitImplicitCastExpr(ImplicitCastExpr *E) {
+      if (E->getCastKind() == CK_LValueToRValue)
+        HandleValue(E->getSubExpr());
+
+      Inherited::VisitImplicitCastExpr(E);
+    }
+
+    void VisitCXXMemberCallExpr(CXXMemberCallExpr *E) {
+      Expr *Callee = E->getCallee();
+      if (isa<MemberExpr>(Callee))
+        HandleValue(Callee);
+
+      Inherited::VisitCXXMemberCallExpr(E);
+    }
+  };
+  static void CheckInitExprContainsUninitializedFields(Sema &S, Expr *E,
+                                                       ValueDecl *VD) {
+    UninitializedFieldVisitor(S, VD).HandleExpr(E);
+  }
+} // namespace
+
 /// ActOnCXXInClassMemberInitializer - This is invoked after parsing an
 /// in-class initializer for a non-static C++ class member, and after
 /// instantiating an in-class initializer in a class template. Such actions
@@ -1685,8 +1903,17 @@ Sema::ActOnCXXInClassMemberInitializer(Decl *D, SourceLocation InitLoc,
     return;
   }
 
+  if (getDiagnostics().getDiagnosticLevel(diag::warn_field_is_uninit, InitLoc)
+      != DiagnosticsEngine::Ignored) {
+    CheckInitExprContainsUninitializedFields(*this, InitExpr, FD);
+  }
+
   ExprResult Init = InitExpr;
-  if (!FD->getType()->isDependentType() && !InitExpr->isTypeDependent()) {
+  if (!FD->getType()->isDependentType() && !InitExpr->isTypeDependent() &&
+      !FD->getDeclContext()->isDependentContext()) {
+    // Note: We don't type-check when we're in a dependent context, because
+    // the initialization-substitution code does not properly handle direct
+    // list initialization. We have the same hackaround for ctor-initializers.
     if (isa<InitListExpr>(InitExpr) && isStdInitializerList(FD->getType(), 0)) {
       Diag(FD->getLocation(), diag::warn_dangling_std_initializer_list)
         << /*at end of ctor*/1 << InitExpr->getSourceRange();
@@ -1795,7 +2022,8 @@ Sema::ActOnMemInitializer(Decl *ConstructorD,
                           Expr **Args, unsigned NumArgs,
                           SourceLocation RParenLoc,
                           SourceLocation EllipsisLoc) {
-  Expr *List = new (Context) ParenListExpr(Context, LParenLoc, Args, NumArgs,
+  Expr *List = new (Context) ParenListExpr(Context, LParenLoc,
+                                           llvm::makeArrayRef(Args, NumArgs),
                                            RParenLoc);
   return BuildMemInitializer(ConstructorD, S, SS, MemberOrBase, TemplateTypeTy,
                              DS, IdLoc, List, EllipsisLoc);
@@ -2044,96 +2272,6 @@ static void CheckForDanglingReferenceOrPointer(Sema &S, ValueDecl *Member,
     << (unsigned)IsPointer;
 }
 
-namespace {
-  class UninitializedFieldVisitor
-      : public EvaluatedExprVisitor<UninitializedFieldVisitor> {
-    Sema &S;
-    ValueDecl *VD;
-  public:
-    typedef EvaluatedExprVisitor<UninitializedFieldVisitor> Inherited;
-    UninitializedFieldVisitor(Sema &S, ValueDecl *VD) : Inherited(S.Context),
-                                                        S(S), VD(VD) {
-    }
-
-    void HandleExpr(Expr *E) {
-      if (!E) return;
-
-      // Expressions like x(x) sometimes lack the surrounding expressions
-      // but need to be checked anyways.
-      HandleValue(E);
-      Visit(E);
-    }
-
-    void HandleValue(Expr *E) {
-      E = E->IgnoreParens();
-
-      if (MemberExpr *ME = dyn_cast<MemberExpr>(E)) {
-        if (isa<EnumConstantDecl>(ME->getMemberDecl()))
-            return;
-        Expr *Base = E;
-        while (isa<MemberExpr>(Base)) {
-          ME = dyn_cast<MemberExpr>(Base);
-          if (VarDecl *VarD = dyn_cast<VarDecl>(ME->getMemberDecl()))
-            if (VarD->hasGlobalStorage())
-              return;
-          Base = ME->getBase();
-        }
-
-        if (VD == ME->getMemberDecl() && isa<CXXThisExpr>(Base)) {
-          S.Diag(ME->getExprLoc(), diag::warn_field_is_uninit);
-          return;
-        }
-      }
-
-      if (ConditionalOperator *CO = dyn_cast<ConditionalOperator>(E)) {
-        HandleValue(CO->getTrueExpr());
-        HandleValue(CO->getFalseExpr());
-        return;
-      }
-
-      if (BinaryConditionalOperator *BCO =
-              dyn_cast<BinaryConditionalOperator>(E)) {
-        HandleValue(BCO->getCommon());
-        HandleValue(BCO->getFalseExpr());
-        return;
-      }
-
-      if (BinaryOperator *BO = dyn_cast<BinaryOperator>(E)) {
-        switch (BO->getOpcode()) {
-        default:
-          return;
-        case(BO_PtrMemD):
-        case(BO_PtrMemI):
-          HandleValue(BO->getLHS());
-          return;
-        case(BO_Comma):
-          HandleValue(BO->getRHS());
-          return;
-        }
-      }
-    }
-
-    void VisitImplicitCastExpr(ImplicitCastExpr *E) {
-      if (E->getCastKind() == CK_LValueToRValue)
-        HandleValue(E->getSubExpr());
-
-      Inherited::VisitImplicitCastExpr(E);
-    }
-
-    void VisitCXXMemberCallExpr(CXXMemberCallExpr *E) {
-      Expr *Callee = E->getCallee();
-      if (isa<MemberExpr>(Callee))
-        HandleValue(Callee);
-
-      Inherited::VisitCXXMemberCallExpr(E);
-    }
-  };
-  static void CheckInitExprContainsUninitializedFields(Sema &S, Expr *E,
-                                                       ValueDecl *VD) {
-    UninitializedFieldVisitor(S, VD).HandleExpr(E);
-  }
-} // namespace
-
 MemInitResult
 Sema::BuildMemberInitializer(ValueDecl *Member, Expr *Init,
                              SourceLocation IdLoc) {
@@ -2167,11 +2305,13 @@ Sema::BuildMemberInitializer(ValueDecl *Member, Expr *Init,
         != DiagnosticsEngine::Ignored)
     for (unsigned i = 0; i < NumArgs; ++i)
       // FIXME: Warn about the case when other fields are used before being
-      // uninitialized. For example, let this field be the i'th field. When
+      // initialized. For example, let this field be the i'th field. When
       // initializing the i'th field, throw a warning if any of the >= i'th
       // fields are used, as they are not yet initialized.
       // Right now we are only handling the case where the i'th field uses
       // itself in its initializer.
+      // Also need to take into account that some fields may be initialized by
+      // in-class initializers, see C++11 [class.base.init]p9.
       CheckInitExprContainsUninitializedFields(*this, Args[i], Member);
 
   SourceRange InitRange = Init->getSourceRange();
@@ -2204,7 +2344,7 @@ Sema::BuildMemberInitializer(ValueDecl *Member, Expr *Init,
 
     InitializationSequence InitSeq(*this, MemberEntity, Kind, Args, NumArgs);
     ExprResult MemberInit = InitSeq.Perform(*this, MemberEntity, Kind,
-                                            MultiExprArg(*this, Args, NumArgs),
+                                            MultiExprArg(Args, NumArgs),
                                             0);
     if (MemberInit.isInvalid())
       return true;
@@ -2273,7 +2413,7 @@ Sema::BuildDelegatingInitializer(TypeSourceInfo *TInfo, Expr *Init,
                                                 InitRange.getEnd());
   InitializationSequence InitSeq(*this, DelegationEntity, Kind, Args, NumArgs);
   ExprResult DelegationInit = InitSeq.Perform(*this, DelegationEntity, Kind,
-                                              MultiExprArg(*this, Args,NumArgs),
+                                              MultiExprArg(Args, NumArgs),
                                               0);
   if (DelegationInit.isInvalid())
     return true;
@@ -2411,8 +2551,7 @@ Sema::BuildBaseInitializer(QualType BaseType, TypeSourceInfo *BaseTInfo,
                                                 InitRange.getEnd());
   InitializationSequence InitSeq(*this, BaseEntity, Kind, Args, NumArgs);
   ExprResult BaseInit = InitSeq.Perform(*this, BaseEntity, Kind,
-                                          MultiExprArg(*this, Args, NumArgs),
-                                          0);
+                                        MultiExprArg(Args, NumArgs), 0);
   if (BaseInit.isInvalid())
     return true;
 
@@ -2480,8 +2619,7 @@ BuildImplicitBaseInitializer(Sema &SemaRef, CXXConstructorDecl *Constructor,
     InitializationKind InitKind
       = InitializationKind::CreateDefault(Constructor->getLocation());
     InitializationSequence InitSeq(SemaRef, InitEntity, InitKind, 0, 0);
-    BaseInit = InitSeq.Perform(SemaRef, InitEntity, InitKind,
-                               MultiExprArg(SemaRef, 0, 0));
+    BaseInit = InitSeq.Perform(SemaRef, InitEntity, InitKind, MultiExprArg());
     break;
   }
 
@@ -2936,7 +3074,11 @@ bool Sema::SetCtorInitializers(CXXConstructorDecl *Constructor,
              NumInitializers * sizeof(CXXCtorInitializer*));
       Constructor->setCtorInitializers(baseOrMemberInitializers);
     }
-    
+
+    // Let template instantiation know whether we had errors.
+    if (AnyErrors)
+      Constructor->setInvalidDecl();
+
     return false;
   }
 
@@ -3324,11 +3466,10 @@ void Sema::ActOnMemInitializers(Decl *ConstructorDecl,
     } else {
       assert(Init->isDelegatingInitializer());
       // This must be the only initializer
-      if (i != 0 || NumMemInits > 1) {
-        Diag(MemInits[0]->getSourceLocation(),
+      if (NumMemInits != 1) {
+        Diag(Init->getSourceLocation(),
              diag::err_delegating_initializer_alone)
-          << MemInits[0]->getSourceRange();
-        HadError = true;
+          << Init->getSourceRange() << MemInits[i ? 0 : 1]->getSourceRange();
         // We will treat this as being the only initializer.
       }
       SetDelegatingInitializer(Constructor, MemInits[i]);
@@ -3812,6 +3953,11 @@ void Sema::CheckCompletedCXXClass(CXXRecordDecl *Record) {
            diag::warn_non_virtual_dtor) << Context.getRecordType(Record);
   }
 
+  if (Record->isAbstract() && Record->hasAttr<FinalAttr>()) {
+    Diag(Record->getLocation(), diag::warn_abstract_final_class);
+    DiagnoseAbstractType(Record);
+  }
+
   // See if a method overloads virtual methods in a base
   /// class without overriding any.
   if (!Record->isDependentType()) {
@@ -4065,7 +4211,7 @@ void Sema::CheckExplicitlyDefaultedSpecialMember(CXXMethodDecl *MD) {
 
   // Compute argument constness, constexpr, and triviality.
   bool CanHaveConstParam = false;
-  bool Trivial;
+  bool Trivial = false;
   switch (CSM) {
   case CXXDefaultConstructor:
     Trivial = RD->hasTrivialDefaultConstructor();
@@ -4304,7 +4450,7 @@ bool SpecialMemberDeletionInfo::isAccessible(Subobject Subobj,
   /// If we're operating on a base class, the object type is the
   /// type of this special member.
   QualType objectTy;
-  AccessSpecifier access = target->getAccess();;
+  AccessSpecifier access = target->getAccess();
   if (CXXBaseSpecifier *base = Subobj.dyn_cast<CXXBaseSpecifier*>()) {
     objectTy = S.Context.getTypeDeclType(MD->getParent());
     access = CXXRecordDecl::MergeAccess(base->getAccessSpecifier(), access);
@@ -4647,6 +4793,19 @@ namespace {
   };
 }
 
+/// \brief Check whether any most overriden method from MD in Methods
+static bool CheckMostOverridenMethods(const CXXMethodDecl *MD,
+                   const llvm::SmallPtrSet<const CXXMethodDecl *, 8>& Methods) {
+  if (MD->size_overridden_methods() == 0)
+    return Methods.count(MD->getCanonicalDecl());
+  for (CXXMethodDecl::method_iterator I = MD->begin_overridden_methods(),
+                                      E = MD->end_overridden_methods();
+       I != E; ++I)
+    if (CheckMostOverridenMethods(*I, Methods))
+      return true;
+  return false;
+}
+
 /// \brief Member lookup function that determines whether a given C++
 /// method overloads virtual methods in a base class without overriding any,
 /// to be used with CXXRecordDecl::lookupInBases().
@@ -4678,7 +4837,7 @@ static bool FindHiddenVirtualMethod(const CXXBaseSpecifier *Specifier,
       if (!Data.S->IsOverload(Data.Method, MD, false))
         return true;
       // Collect the overload only if its hidden.
-      if (!Data.OverridenAndUsingBaseMethods.count(MD))
+      if (!CheckMostOverridenMethods(MD, Data.OverridenAndUsingBaseMethods))
         overloadedMethods.push_back(MD);
     }
   }
@@ -4689,6 +4848,17 @@ static bool FindHiddenVirtualMethod(const CXXBaseSpecifier *Specifier,
   return foundSameNameMethod;
 }
 
+/// \brief Add the most overriden methods from MD to Methods
+static void AddMostOverridenMethods(const CXXMethodDecl *MD,
+                         llvm::SmallPtrSet<const CXXMethodDecl *, 8>& Methods) {
+  if (MD->size_overridden_methods() == 0)
+    Methods.insert(MD->getCanonicalDecl());
+  for (CXXMethodDecl::method_iterator I = MD->begin_overridden_methods(),
+                                      E = MD->end_overridden_methods();
+       I != E; ++I)
+    AddMostOverridenMethods(*I, Methods);
+}
+
 /// \brief See if a method overloads virtual methods in a base class without
 /// overriding any.
 void Sema::DiagnoseHiddenVirtualMethods(CXXRecordDecl *DC, CXXMethodDecl *MD) {
@@ -4709,14 +4879,11 @@ void Sema::DiagnoseHiddenVirtualMethods(CXXRecordDecl *DC, CXXMethodDecl *MD) {
   // by 'using' in a set. A base method not in this set is hidden.
   for (DeclContext::lookup_result res = DC->lookup(MD->getDeclName());
        res.first != res.second; ++res.first) {
-    if (CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(*res.first))
-      for (CXXMethodDecl::method_iterator I = MD->begin_overridden_methods(),
-                                          E = MD->end_overridden_methods();
-           I != E; ++I)
-        Data.OverridenAndUsingBaseMethods.insert((*I)->getCanonicalDecl());
+    NamedDecl *ND = *res.first;
     if (UsingShadowDecl *shad = dyn_cast<UsingShadowDecl>(*res.first))
-      if (CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(shad->getTargetDecl()))
-        Data.OverridenAndUsingBaseMethods.insert(MD->getCanonicalDecl());
+      ND = shad->getTargetDecl();
+    if (CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(ND))
+      AddMostOverridenMethods(MD, Data.OverridenAndUsingBaseMethods);
   }
 
   if (DC->lookupInBases(&FindHiddenVirtualMethod, &Data, Paths) &&
@@ -5307,7 +5474,47 @@ Decl *Sema::ActOnConversionDeclarator(CXXConversionDecl *Conversion) {
 // Namespace Handling
 //===----------------------------------------------------------------------===//
 
+/// \brief Diagnose a mismatch in 'inline' qualifiers when a namespace is
+/// reopened.
+static void DiagnoseNamespaceInlineMismatch(Sema &S, SourceLocation KeywordLoc,
+                                            SourceLocation Loc,
+                                            IdentifierInfo *II, bool *IsInline,
+                                            NamespaceDecl *PrevNS) {
+  assert(*IsInline != PrevNS->isInline());
+
+  // HACK: Work around a bug in libstdc++4.6's <atomic>, where
+  // std::__atomic[0,1,2] are defined as non-inline namespaces, then reopened as
+  // inline namespaces, with the intention of bringing names into namespace std.
+  //
+  // We support this just well enough to get that case working; this is not
+  // sufficient to support reopening namespaces as inline in general.
+  if (*IsInline && II && II->getName().startswith("__atomic") &&
+      S.getSourceManager().isInSystemHeader(Loc)) {
+    // Mark all prior declarations of the namespace as inline.
+    for (NamespaceDecl *NS = PrevNS->getMostRecentDecl(); NS;
+         NS = NS->getPreviousDecl())
+      NS->setInline(*IsInline);
+    // Patch up the lookup table for the containing namespace. This isn't really
+    // correct, but it's good enough for this particular case.
+    for (DeclContext::decl_iterator I = PrevNS->decls_begin(),
+                                    E = PrevNS->decls_end(); I != E; ++I)
+      if (NamedDecl *ND = dyn_cast<NamedDecl>(*I))
+        PrevNS->getParent()->makeDeclVisibleInContext(ND);
+    return;
+  }
+
+  if (PrevNS->isInline())
+    // The user probably just forgot the 'inline', so suggest that it
+    // be added back.
+    S.Diag(Loc, diag::warn_inline_namespace_reopened_noninline)
+      << FixItHint::CreateInsertion(KeywordLoc, "inline ");
+  else
+    S.Diag(Loc, diag::err_inline_namespace_mismatch)
+      << IsInline;
 
+  S.Diag(PrevNS->getLocation(), diag::note_previous_definition);
+  *IsInline = PrevNS->isInline();
+}
 
 /// ActOnStartNamespaceDef - This is called at the start of a namespace
 /// definition.
@@ -5357,21 +5564,9 @@ Decl *Sema::ActOnStartNamespaceDef(Scope *NamespcScope,
     
     if (PrevNS) {
       // This is an extended namespace definition.
-      if (IsInline != PrevNS->isInline()) {
-        // inline-ness must match
-        if (PrevNS->isInline()) {
-          // The user probably just forgot the 'inline', so suggest that it
-          // be added back.
-          Diag(Loc, diag::warn_inline_namespace_reopened_noninline)
-            << FixItHint::CreateInsertion(NamespaceLoc, "inline ");
-        } else {
-          Diag(Loc, diag::err_inline_namespace_mismatch)
-            << IsInline;
-        }
-        Diag(PrevNS->getLocation(), diag::note_previous_definition);
-        
-        IsInline = PrevNS->isInline();
-      }      
+      if (IsInline != PrevNS->isInline())
+        DiagnoseNamespaceInlineMismatch(*this, NamespaceLoc, Loc, II,
+                                        &IsInline, PrevNS);
     } else if (PrevDecl) {
       // This is an invalid name redefinition.
       Diag(Loc, diag::err_redefinition_different_kind)
@@ -5402,15 +5597,9 @@ Decl *Sema::ActOnStartNamespaceDef(Scope *NamespcScope,
       PrevNS = ND->getAnonymousNamespace();
     }
 
-    if (PrevNS && IsInline != PrevNS->isInline()) {
-      // inline-ness must match
-      Diag(Loc, diag::err_inline_namespace_mismatch)
-        << IsInline;
-      Diag(PrevNS->getLocation(), diag::note_previous_definition);
-      
-      // Recover by ignoring the new namespace's inline status.
-      IsInline = PrevNS->isInline();
-    }
+    if (PrevNS && IsInline != PrevNS->isInline())
+      DiagnoseNamespaceInlineMismatch(*this, NamespaceLoc, NamespaceLoc, II,
+                                      &IsInline, PrevNS);
   }
   
   NamespaceDecl *Namespc = NamespaceDecl::Create(Context, CurContext, IsInline,
@@ -5460,15 +5649,15 @@ Decl *Sema::ActOnStartNamespaceDef(Scope *NamespcScope,
 
     if (!PrevNS) {
       UsingDirectiveDecl* UD
-        = UsingDirectiveDecl::Create(Context, CurContext,
+        = UsingDirectiveDecl::Create(Context, Parent,
                                      /* 'using' */ LBrace,
                                      /* 'namespace' */ SourceLocation(),
                                      /* qualifier */ NestedNameSpecifierLoc(),
                                      /* identifier */ SourceLocation(),
                                      Namespc,
-                                     /* Ancestor */ CurContext);
+                                     /* Ancestor */ Parent);
       UD->setImplicit();
-      CurContext->addDecl(UD);
+      Parent->addDecl(UD);
     }
   }
 
@@ -5697,7 +5886,8 @@ static bool TryNamespaceTypoCorrection(Sema &S, LookupResult &R, Scope *Sc,
     if (DeclContext *DC = S.computeDeclContext(SS, false))
       S.Diag(IdentLoc, diag::err_using_directive_member_suggest)
         << Ident << DC << CorrectedQuotedStr << SS.getRange()
-        << FixItHint::CreateReplacement(IdentLoc, CorrectedStr);
+        << FixItHint::CreateReplacement(Corrected.getCorrectionRange(),
+                                        CorrectedStr);
     else
       S.Diag(IdentLoc, diag::err_using_directive_suggest)
         << Ident << CorrectedQuotedStr
@@ -6562,10 +6752,10 @@ Decl *Sema::ActOnAliasDeclaration(Scope *S,
 
     if (TemplateParamLists.size() != 1) {
       Diag(UsingLoc, diag::err_alias_template_extra_headers)
-        << SourceRange(TemplateParamLists.get()[1]->getTemplateLoc(),
-         TemplateParamLists.get()[TemplateParamLists.size()-1]->getRAngleLoc());
+        << SourceRange(TemplateParamLists[1]->getTemplateLoc(),
+         TemplateParamLists[TemplateParamLists.size()-1]->getRAngleLoc());
     }
-    TemplateParameterList *TemplateParams = TemplateParamLists.get()[0];
+    TemplateParameterList *TemplateParams = TemplateParamLists[0];
 
     // Only consider previous declarations in the same scope.
     FilterLookupForScope(Previous, CurContext, S, /*ConsiderLinkage*/false,
@@ -6696,28 +6886,6 @@ Decl *Sema::ActOnNamespaceAliasDef(Scope *S,
   return AliasDecl;
 }
 
-namespace {
-  /// \brief Scoped object used to handle the state changes required in Sema
-  /// to implicitly define the body of a C++ member function;
-  class ImplicitlyDefinedFunctionScope {
-    Sema &S;
-    Sema::ContextRAII SavedContext;
-    
-  public:
-    ImplicitlyDefinedFunctionScope(Sema &S, CXXMethodDecl *Method)
-      : S(S), SavedContext(S, Method) 
-    {
-      S.PushFunctionScope();
-      S.PushExpressionEvaluationContext(Sema::PotentiallyEvaluated);
-    }
-    
-    ~ImplicitlyDefinedFunctionScope() {
-      S.PopExpressionEvaluationContext();
-      S.PopFunctionScopeInfo();
-    }
-  };
-}
-
 Sema::ImplicitExceptionSpecification
 Sema::ComputeDefaultedDefaultCtorExceptionSpec(SourceLocation Loc,
                                                CXXMethodDecl *MD) {
@@ -6861,7 +7029,7 @@ void Sema::DefineImplicitDefaultConstructor(SourceLocation CurrentLocation,
   CXXRecordDecl *ClassDecl = Constructor->getParent();
   assert(ClassDecl && "DefineImplicitDefaultConstructor - invalid constructor");
 
-  ImplicitlyDefinedFunctionScope Scope(*this, Constructor);
+  SynthesizedFunctionScope Scope(*this, Constructor);
   DiagnosticErrorTrap Trap(Diags);
   if (SetCtorInitializers(Constructor, 0, 0, /*AnyErrors=*/false) ||
       Trap.hasErrorOccurred()) {
@@ -7173,7 +7341,7 @@ void Sema::DefineImplicitDestructor(SourceLocation CurrentLocation,
   if (Destructor->isInvalidDecl())
     return;
 
-  ImplicitlyDefinedFunctionScope Scope(*this, Destructor);
+  SynthesizedFunctionScope Scope(*this, Destructor);
 
   DiagnosticErrorTrap Trap(Diags);
   MarkBaseAndMemberDestructorsReferenced(Destructor->getLocation(),
@@ -7412,7 +7580,7 @@ BuildSingleCopyAssign(Sema &S, SourceLocation Loc, QualType T,
     = new (S.Context) BinaryOperator(IterationVarRefRVal,
                      IntegerLiteral::Create(S.Context, Upper, SizeType, Loc),
                                      BO_NE, S.Context.BoolTy,
-                                     VK_RValue, OK_Ordinary, Loc);
+                                     VK_RValue, OK_Ordinary, Loc, false);
   
   // Create the pre-increment of the iteration variable.
   Expr *Increment
@@ -7654,7 +7822,7 @@ void Sema::DefineImplicitCopyAssignment(SourceLocation CurrentLocation,
   
   CopyAssignOperator->setUsed();
 
-  ImplicitlyDefinedFunctionScope Scope(*this, CopyAssignOperator);
+  SynthesizedFunctionScope Scope(*this, CopyAssignOperator);
   DiagnosticErrorTrap Trap(Diags);
 
   // C++0x [class.copy]p30:
@@ -7666,7 +7834,7 @@ void Sema::DefineImplicitCopyAssignment(SourceLocation CurrentLocation,
   //   which they were declared in the class definition.
   
   // The statements that form the synthesized function body.
-  ASTOwningVector<Stmt*> Statements(*this);
+  SmallVector<Stmt*, 8> Statements;
   
   // The parameter for the "other" object, which we are copying from.
   ParmVarDecl *Other = CopyAssignOperator->getParamDecl(0);
@@ -7846,8 +8014,8 @@ void Sema::DefineImplicitCopyAssignment(SourceLocation CurrentLocation,
           }
         
           CollectableMemCpyRef = BuildDeclRefExpr(CollectableMemCpy, 
-                                                  CollectableMemCpy->getType(),
-                                                  VK_LValue, Loc, 0).take();
+                                                  Context.BuiltinFnTy,
+                                                  VK_RValue, Loc, 0).take();
           assert(CollectableMemCpyRef && "Builtin reference cannot fail");
         }
       }
@@ -7866,12 +8034,12 @@ void Sema::DefineImplicitCopyAssignment(SourceLocation CurrentLocation,
         }
 
         BuiltinMemCpyRef = BuildDeclRefExpr(BuiltinMemCpy, 
-                                            BuiltinMemCpy->getType(),
-                                            VK_LValue, Loc, 0).take();
+                                            Context.BuiltinFnTy,
+                                            VK_RValue, Loc, 0).take();
         assert(BuiltinMemCpyRef && "Builtin reference cannot fail");
       }
           
-      ASTOwningVector<Expr*> CallArgs(*this);
+      SmallVector<Expr*, 8> CallArgs;
       CallArgs.push_back(To.takeAs<Expr>());
       CallArgs.push_back(From.takeAs<Expr>());
       CallArgs.push_back(IntegerLiteral::Create(Context, Size, SizeType, Loc));
@@ -7879,12 +8047,12 @@ void Sema::DefineImplicitCopyAssignment(SourceLocation CurrentLocation,
       if (NeedsCollectableMemCpy)
         Call = ActOnCallExpr(/*Scope=*/0,
                              CollectableMemCpyRef,
-                             Loc, move_arg(CallArgs), 
+                             Loc, CallArgs,
                              Loc);
       else
         Call = ActOnCallExpr(/*Scope=*/0,
                              BuiltinMemCpyRef,
-                             Loc, move_arg(CallArgs), 
+                             Loc, CallArgs,
                              Loc);
           
       assert(!Call.isInvalid() && "Call to __builtin_memcpy cannot fail!");
@@ -7934,7 +8102,7 @@ void Sema::DefineImplicitCopyAssignment(SourceLocation CurrentLocation,
   StmtResult Body;
   {
     CompoundScopeRAII CompoundScope(*this);
-    Body = ActOnCompoundStmt(Loc, Loc, move_arg(Statements),
+    Body = ActOnCompoundStmt(Loc, Loc, Statements,
                              /*isStmtExpr=*/false);
     assert(!Body.isInvalid() && "Compound statement creation cannot fail");
   }
@@ -8040,7 +8208,7 @@ hasMoveOrIsTriviallyCopyable(Sema &S, QualType Type, bool IsConstructor) {
   // reference types, are supposed to return false here, but that appears
   // to be a standard defect.
   CXXRecordDecl *ClassDecl = Type->getAsCXXRecordDecl();
-  if (!ClassDecl || !ClassDecl->getDefinition())
+  if (!ClassDecl || !ClassDecl->getDefinition() || ClassDecl->isInvalidDecl())
     return true;
 
   if (Type.isTriviallyCopyableType(S.Context))
@@ -8195,7 +8363,7 @@ void Sema::DefineImplicitMoveAssignment(SourceLocation CurrentLocation,
   
   MoveAssignOperator->setUsed();
 
-  ImplicitlyDefinedFunctionScope Scope(*this, MoveAssignOperator);
+  SynthesizedFunctionScope Scope(*this, MoveAssignOperator);
   DiagnosticErrorTrap Trap(Diags);
 
   // C++0x [class.copy]p28:
@@ -8207,7 +8375,7 @@ void Sema::DefineImplicitMoveAssignment(SourceLocation CurrentLocation,
   //   definition.
 
   // The statements that form the synthesized function body.
-  ASTOwningVector<Stmt*> Statements(*this);
+  SmallVector<Stmt*, 8> Statements;
 
   // The parameter for the "other" object, which we are move from.
   ParmVarDecl *Other = MoveAssignOperator->getParamDecl(0);
@@ -8395,8 +8563,8 @@ void Sema::DefineImplicitMoveAssignment(SourceLocation CurrentLocation,
           }
         
           CollectableMemCpyRef = BuildDeclRefExpr(CollectableMemCpy, 
-                                                  CollectableMemCpy->getType(),
-                                                  VK_LValue, Loc, 0).take();
+                                                  Context.BuiltinFnTy,
+                                                  VK_RValue, Loc, 0).take();
           assert(CollectableMemCpyRef && "Builtin reference cannot fail");
         }
       }
@@ -8415,12 +8583,12 @@ void Sema::DefineImplicitMoveAssignment(SourceLocation CurrentLocation,
         }
 
         BuiltinMemCpyRef = BuildDeclRefExpr(BuiltinMemCpy, 
-                                            BuiltinMemCpy->getType(),
-                                            VK_LValue, Loc, 0).take();
+                                            Context.BuiltinFnTy,
+                                            VK_RValue, Loc, 0).take();
         assert(BuiltinMemCpyRef && "Builtin reference cannot fail");
       }
           
-      ASTOwningVector<Expr*> CallArgs(*this);
+      SmallVector<Expr*, 8> CallArgs;
       CallArgs.push_back(To.takeAs<Expr>());
       CallArgs.push_back(From.takeAs<Expr>());
       CallArgs.push_back(IntegerLiteral::Create(Context, Size, SizeType, Loc));
@@ -8428,12 +8596,12 @@ void Sema::DefineImplicitMoveAssignment(SourceLocation CurrentLocation,
       if (NeedsCollectableMemCpy)
         Call = ActOnCallExpr(/*Scope=*/0,
                              CollectableMemCpyRef,
-                             Loc, move_arg(CallArgs), 
+                             Loc, CallArgs,
                              Loc);
       else
         Call = ActOnCallExpr(/*Scope=*/0,
                              BuiltinMemCpyRef,
-                             Loc, move_arg(CallArgs), 
+                             Loc, CallArgs,
                              Loc);
           
       assert(!Call.isInvalid() && "Call to __builtin_memcpy cannot fail!");
@@ -8483,7 +8651,7 @@ void Sema::DefineImplicitMoveAssignment(SourceLocation CurrentLocation,
   StmtResult Body;
   {
     CompoundScopeRAII CompoundScope(*this);
-    Body = ActOnCompoundStmt(Loc, Loc, move_arg(Statements),
+    Body = ActOnCompoundStmt(Loc, Loc, Statements,
                              /*isStmtExpr=*/false);
     assert(!Body.isInvalid() && "Compound statement creation cannot fail");
   }
@@ -8691,7 +8859,7 @@ void Sema::DefineImplicitCopyConstructor(SourceLocation CurrentLocation,
   CXXRecordDecl *ClassDecl = CopyConstructor->getParent();
   assert(ClassDecl && "DefineImplicitCopyConstructor - invalid constructor");
 
-  ImplicitlyDefinedFunctionScope Scope(*this, CopyConstructor);
+  SynthesizedFunctionScope Scope(*this, CopyConstructor);
   DiagnosticErrorTrap Trap(Diags);
 
   if (SetCtorInitializers(CopyConstructor, 0, 0, /*AnyErrors=*/false) ||
@@ -8703,7 +8871,7 @@ void Sema::DefineImplicitCopyConstructor(SourceLocation CurrentLocation,
     Sema::CompoundScopeRAII CompoundScope(*this);
     CopyConstructor->setBody(ActOnCompoundStmt(CopyConstructor->getLocation(),
                                                CopyConstructor->getLocation(),
-                                               MultiStmtArg(*this, 0, 0),
+                                               MultiStmtArg(),
                                                /*isStmtExpr=*/false)
                                                               .takeAs<Stmt>());
     CopyConstructor->setImplicitlyDefined(true);
@@ -8874,7 +9042,7 @@ void Sema::DefineImplicitMoveConstructor(SourceLocation CurrentLocation,
   CXXRecordDecl *ClassDecl = MoveConstructor->getParent();
   assert(ClassDecl && "DefineImplicitMoveConstructor - invalid constructor");
 
-  ImplicitlyDefinedFunctionScope Scope(*this, MoveConstructor);
+  SynthesizedFunctionScope Scope(*this, MoveConstructor);
   DiagnosticErrorTrap Trap(Diags);
 
   if (SetCtorInitializers(MoveConstructor, 0, 0, /*AnyErrors=*/false) ||
@@ -8886,7 +9054,7 @@ void Sema::DefineImplicitMoveConstructor(SourceLocation CurrentLocation,
     Sema::CompoundScopeRAII CompoundScope(*this);
     MoveConstructor->setBody(ActOnCompoundStmt(MoveConstructor->getLocation(),
                                                MoveConstructor->getLocation(),
-                                               MultiStmtArg(*this, 0, 0),
+                                               MultiStmtArg(),
                                                /*isStmtExpr=*/false)
                                                               .takeAs<Stmt>());
     MoveConstructor->setImplicitlyDefined(true);
@@ -8926,7 +9094,7 @@ void Sema::DefineImplicitLambdaToFunctionPointerConversion(
   
   Conv->setUsed();
   
-  ImplicitlyDefinedFunctionScope Scope(*this, Conv);
+  SynthesizedFunctionScope Scope(*this, Conv);
   DiagnosticErrorTrap Trap(Diags);
   
   // Return the address of the __invoke function.
@@ -8959,7 +9127,7 @@ void Sema::DefineImplicitLambdaToBlockPointerConversion(
 {
   Conv->setUsed();
   
-  ImplicitlyDefinedFunctionScope Scope(*this, Conv);
+  SynthesizedFunctionScope Scope(*this, Conv);
   DiagnosticErrorTrap Trap(Diags);
   
   // Copy-initialize the lambda object as needed to capture it.
@@ -9014,12 +9182,12 @@ static bool hasOneRealArgument(MultiExprArg Args) {
     return false;
     
   default:
-    if (!Args.get()[1]->isDefaultArgument())
+    if (!Args[1]->isDefaultArgument())
       return false;
     
     // fall through
   case 1:
-    return !Args.get()[0]->isDefaultArgument();
+    return !Args[0]->isDefaultArgument();
   }
   
   return false;
@@ -9047,12 +9215,12 @@ Sema::BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType,
   //       directly into the target of the omitted copy/move
   if (ConstructKind == CXXConstructExpr::CK_Complete &&
       Constructor->isCopyOrMoveConstructor() && hasOneRealArgument(ExprArgs)) {
-    Expr *SubExpr = ((Expr **)ExprArgs.get())[0];
+    Expr *SubExpr = ExprArgs[0];
     Elidable = SubExpr->isTemporaryObject(Context, Constructor->getParent());
   }
 
   return BuildCXXConstructExpr(ConstructLoc, DeclInitType, Constructor,
-                               Elidable, move(ExprArgs), HadMultipleCandidates,
+                               Elidable, ExprArgs, HadMultipleCandidates,
                                RequiresZeroInit, ConstructKind, ParenRange);
 }
 
@@ -9066,12 +9234,9 @@ Sema::BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType,
                             bool RequiresZeroInit,
                             unsigned ConstructKind,
                             SourceRange ParenRange) {
-  unsigned NumExprs = ExprArgs.size();
-  Expr **Exprs = (Expr **)ExprArgs.release();
-
   MarkFunctionReferenced(ConstructLoc, Constructor);
   return Owned(CXXConstructExpr::Create(Context, DeclInitType, ConstructLoc,
-                                        Constructor, Elidable, Exprs, NumExprs,
+                                        Constructor, Elidable, ExprArgs,
                                         HadMultipleCandidates, /*FIXME*/false,
                                         RequiresZeroInit,
               static_cast<CXXConstructExpr::ConstructionKind>(ConstructKind),
@@ -9085,7 +9250,7 @@ bool Sema::InitializeVarWithConstructor(VarDecl *VD,
   // FIXME: Provide the correct paren SourceRange when available.
   ExprResult TempResult =
     BuildCXXConstructExpr(VD->getLocation(), VD->getType(), Constructor,
-                          move(Exprs), HadMultipleCandidates, false,
+                          Exprs, HadMultipleCandidates, false,
                           CXXConstructExpr::CK_Complete, SourceRange());
   if (TempResult.isInvalid())
     return true;
@@ -9135,11 +9300,11 @@ bool
 Sema::CompleteConstructorCall(CXXConstructorDecl *Constructor,
                               MultiExprArg ArgsPtr,
                               SourceLocation Loc,
-                              ASTOwningVector<Expr*> &ConvertedArgs,
+                              SmallVectorImpl<Expr*> &ConvertedArgs,
                               bool AllowExplicit) {
   // FIXME: This duplicates a lot of code from Sema::ConvertArgumentsForCall.
   unsigned NumArgs = ArgsPtr.size();
-  Expr **Args = (Expr **)ArgsPtr.get();
+  Expr **Args = ArgsPtr.data();
 
   const FunctionProtoType *Proto 
     = Constructor->getType()->getAs<FunctionProtoType>();
@@ -9268,7 +9433,7 @@ CheckOperatorNewDeclaration(Sema &SemaRef, const FunctionDecl *FnDecl) {
 }
 
 static bool
-CheckOperatorDeleteDeclaration(Sema &SemaRef, const FunctionDecl *FnDecl) {
+CheckOperatorDeleteDeclaration(Sema &SemaRef, FunctionDecl *FnDecl) {
   // C++ [basic.stc.dynamic.deallocation]p1:
   //   A program is ill-formed if deallocation functions are declared in a
   //   namespace scope other than global scope or declared static in global 
@@ -9825,7 +9990,7 @@ Decl *Sema::BuildStaticAssertDeclaration(SourceLocation StaticAssertLoc,
 /// \brief Perform semantic analysis of the given friend type declaration.
 ///
 /// \returns A friend declaration that.
-FriendDecl *Sema::CheckFriendTypeDecl(SourceLocation Loc,
+FriendDecl *Sema::CheckFriendTypeDecl(SourceLocation LocStart,
                                       SourceLocation FriendLoc,
                                       TypeSourceInfo *TSInfo) {
   assert(TSInfo && "NULL TypeSourceInfo for friend type declaration");
@@ -9864,7 +10029,7 @@ FriendDecl *Sema::CheckFriendTypeDecl(SourceLocation Loc,
              diag::warn_cxx98_compat_nonclass_type_friend :
              diag::ext_nonclass_type_friend)
         << T
-        << SourceRange(FriendLoc, TypeRange.getEnd());
+        << TypeRange;
     }
   } else if (T->getAs<EnumType>()) {
     Diag(FriendLoc,
@@ -9872,18 +10037,22 @@ FriendDecl *Sema::CheckFriendTypeDecl(SourceLocation Loc,
            diag::warn_cxx98_compat_enum_friend :
            diag::ext_enum_friend)
       << T
-      << SourceRange(FriendLoc, TypeRange.getEnd());
+      << TypeRange;
   }
   
-  // C++0x [class.friend]p3:
+  // C++11 [class.friend]p3:
+  //   A friend declaration that does not declare a function shall have one
+  //   of the following forms:
+  //     friend elaborated-type-specifier ;
+  //     friend simple-type-specifier ;
+  //     friend typename-specifier ;
+  if (getLangOpts().CPlusPlus0x && LocStart != FriendLoc)
+    Diag(FriendLoc, diag::err_friend_not_first_in_declaration) << T;
+
   //   If the type specifier in a friend declaration designates a (possibly
-  //   cv-qualified) class type, that class is declared as a friend; otherwise, 
+  //   cv-qualified) class type, that class is declared as a friend; otherwise,
   //   the friend declaration is ignored.
-  
-  // FIXME: C++0x has some syntactic restrictions on friend type declarations
-  // in [class.friend]p3 that we do not implement.
-  
-  return FriendDecl::Create(Context, CurContext, Loc, TSInfo, FriendLoc);
+  return FriendDecl::Create(Context, CurContext, LocStart, TSInfo, FriendLoc);
 }
 
 /// Handle a friend tag declaration where the scope specifier was
@@ -9901,7 +10070,7 @@ Decl *Sema::ActOnTemplatedFriendTag(Scope *S, SourceLocation FriendLoc,
 
   if (TemplateParameterList *TemplateParams
         = MatchTemplateParametersToScopeSpecifier(TagLoc, NameLoc, SS,
-                                                  TempParamLists.get(),
+                                                  TempParamLists.data(),
                                                   TempParamLists.size(),
                                                   /*friend*/ true,
                                                   isExplicitSpecialization,
@@ -9916,7 +10085,7 @@ Decl *Sema::ActOnTemplatedFriendTag(Scope *S, SourceLocation FriendLoc,
                                 TemplateParams, AS_public,
                                 /*ModulePrivateLoc=*/SourceLocation(),
                                 TempParamLists.size() - 1,
-                   (TemplateParameterList**) TempParamLists.release()).take();
+                                TempParamLists.data()).take();
     } else {
       // The "template<>" header is extraneous.
       Diag(TemplateParams->getTemplateLoc(), diag::err_template_tag_noparams)
@@ -9929,7 +10098,7 @@ Decl *Sema::ActOnTemplatedFriendTag(Scope *S, SourceLocation FriendLoc,
 
   bool isAllExplicitSpecializations = true;
   for (unsigned I = TempParamLists.size(); I-- > 0; ) {
-    if (TempParamLists.get()[I]->size()) {
+    if (TempParamLists[I]->size()) {
       isAllExplicitSpecializations = false;
       break;
     }
@@ -10076,7 +10245,7 @@ Decl *Sema::ActOnFriendTypeDecl(Scope *S, const DeclSpec &DS,
   if (unsigned NumTempParamLists = TempParams.size())
     D = FriendTemplateDecl::Create(Context, CurContext, Loc,
                                    NumTempParamLists,
-                                   TempParams.release(),
+                                   TempParams.data(),
                                    TSI,
                                    DS.getFriendSpecLoc());
   else
@@ -10318,7 +10487,7 @@ Decl *Sema::ActOnFriendFunctionDecl(Scope *S, Declarator &D,
   
   bool AddToScope = true;
   NamedDecl *ND = ActOnFunctionDeclarator(DCScope, D, DC, TInfo, Previous,
-                                          move(TemplateParams), AddToScope);
+                                          TemplateParams, AddToScope);
   if (!ND) return 0;
 
   assert(ND->getDeclContext() == DC);
@@ -10435,10 +10604,10 @@ void Sema::SetDeclDefaulted(Decl *Dcl, SourceLocation DefaultLoc) {
     // If this definition appears within the record, do the checking when
     // the record is complete.
     const FunctionDecl *Primary = MD;
-    if (MD->getTemplatedKind() != FunctionDecl::TK_NonTemplate)
+    if (const FunctionDecl *Pattern = MD->getTemplateInstantiationPattern())
       // Find the uninstantiated declaration that actually had the '= default'
       // on it.
-      MD->getTemplateInstantiationPattern()->isDefined(Primary);
+      Pattern->isDefined(Primary);
 
     if (Primary == Primary->getCanonicalDecl())
       return;
@@ -10963,14 +11132,16 @@ void DelegatingCycleHelper(CXXConstructorDecl* Ctor,
   if (Ctor->isInvalidDecl())
     return;
 
-  const FunctionDecl *FNTarget = 0;
-  CXXConstructorDecl *Target;
-  
-  // We ignore the result here since if we don't have a body, Target will be
-  // null below.
-  (void)Ctor->getTargetConstructor()->hasBody(FNTarget);
-  Target
-= const_cast<CXXConstructorDecl*>(cast_or_null<CXXConstructorDecl>(FNTarget));
+  CXXConstructorDecl *Target = Ctor->getTargetConstructor();
+
+  // Target may not be determinable yet, for instance if this is a dependent
+  // call in an uninstantiated template.
+  if (Target) {
+    const FunctionDecl *FNTarget = 0;
+    (void)Target->hasBody(FNTarget);
+    Target = const_cast<CXXConstructorDecl*>(
+      cast_or_null<CXXConstructorDecl>(FNTarget));
+  }
 
   CXXConstructorDecl *Canonical = Ctor->getCanonicalDecl(),
                      // Avoid dereferencing a null pointer here.
@@ -10994,17 +11165,18 @@ void DelegatingCycleHelper(CXXConstructorDecl* Ctor,
              diag::warn_delegating_ctor_cycle)
         << Ctor;
 
-      // Don't add a note for a function delegating directo to itself.
+      // Don't add a note for a function delegating directly to itself.
       if (TCanonical != Canonical)
         S.Diag(Target->getLocation(), diag::note_it_delegates_to);
 
       CXXConstructorDecl *C = Target;
       while (C->getCanonicalDecl() != Canonical) {
+        const FunctionDecl *FNTarget = 0;
         (void)C->getTargetConstructor()->hasBody(FNTarget);
         assert(FNTarget && "Ctor cycle through bodiless function");
 
-        C
-       = const_cast<CXXConstructorDecl*>(cast<CXXConstructorDecl>(FNTarget));
+        C = const_cast<CXXConstructorDecl*>(
+          cast<CXXConstructorDecl>(FNTarget));
         S.Diag(C->getLocation(), diag::note_which_delegates_to);
       }
     }
@@ -11027,9 +11199,8 @@ void Sema::CheckDelegatingCtorCycles() {
   for (DelegatingCtorDeclsType::iterator
          I = DelegatingCtorDecls.begin(ExternalSource),
          E = DelegatingCtorDecls.end();
-       I != E; ++I) {
-   DelegatingCycleHelper(*I, Valid, Invalid, Current, *this);
-  }
+       I != E; ++I)
+    DelegatingCycleHelper(*I, Valid, Invalid, Current, *this);
 
   for (CI = Invalid.begin(), CE = Invalid.end(); CI != CE; ++CI)
     (*CI)->setInvalidDecl();
diff --git a/lib/Sema/SemaDeclObjC.cpp b/lib/Sema/SemaDeclObjC.cpp
index 9da4d69382ef..c4e91e85015f 100644
--- a/lib/Sema/SemaDeclObjC.cpp
+++ b/lib/Sema/SemaDeclObjC.cpp
@@ -282,6 +282,25 @@ void Sema::AddAnyMethodToGlobalPool(Decl *D) {
     AddFactoryMethodToGlobalPool(MDecl, true);
 }
 
+/// HasExplicitOwnershipAttr - returns true when pointer to ObjC pointer
+/// has explicit ownership attribute; false otherwise.
+static bool
+HasExplicitOwnershipAttr(Sema &S, ParmVarDecl *Param) {
+  QualType T = Param->getType();
+  
+  if (const PointerType *PT = T->getAs<PointerType>()) {
+    T = PT->getPointeeType();
+  } else if (const ReferenceType *RT = T->getAs<ReferenceType>()) {
+    T = RT->getPointeeType();
+  } else {
+    return true;
+  }
+  
+  // If we have a lifetime qualifier, but it's local, we must have 
+  // inferred it. So, it is implicit.
+  return !T.getLocalQualifiers().hasObjCLifetime();
+}
+
 /// ActOnStartOfObjCMethodDef - This routine sets up parameters; invisible
 /// and user declared, in the method definition's AST.
 void Sema::ActOnStartOfObjCMethodDef(Scope *FnBodyScope, Decl *D) {
@@ -313,6 +332,12 @@ void Sema::ActOnStartOfObjCMethodDef(Scope *FnBodyScope, Decl *D) {
         RequireCompleteType(Param->getLocation(), Param->getType(),
                             diag::err_typecheck_decl_incomplete_type))
           Param->setInvalidDecl();
+    if (!Param->isInvalidDecl() &&
+        getLangOpts().ObjCAutoRefCount &&
+        !HasExplicitOwnershipAttr(*this, Param))
+      Diag(Param->getLocation(), diag::warn_arc_strong_pointer_objc_pointer) <<
+            Param->getType();
+    
     if ((*PI)->getIdentifier())
       PushOnScopeChains(*PI, FnBodyScope);
   }
@@ -345,8 +370,10 @@ void Sema::ActOnStartOfObjCMethodDef(Scope *FnBodyScope, Decl *D) {
   // Warn on deprecated methods under -Wdeprecated-implementations,
   // and prepare for warning on missing super calls.
   if (ObjCInterfaceDecl *IC = MDecl->getClassInterface()) {
-    if (ObjCMethodDecl *IMD = 
-          IC->lookupMethod(MDecl->getSelector(), MDecl->isInstanceMethod()))
+    ObjCMethodDecl *IMD = 
+      IC->lookupMethod(MDecl->getSelector(), MDecl->isInstanceMethod());
+    
+    if (IMD)
       DiagnoseObjCImplementedDeprecations(*this, 
                                           dyn_cast<NamedDecl>(IMD), 
                                           MDecl->getLocation(), 0);
@@ -356,13 +383,23 @@ void Sema::ActOnStartOfObjCMethodDef(Scope *FnBodyScope, Decl *D) {
     // Finally, in ActOnFinishFunctionBody() (SemaDecl), warn if flag is set.
     // Only do this if the current class actually has a superclass.
     if (IC->getSuperClass()) {
-      getCurFunction()->ObjCShouldCallSuperDealloc = 
-        !(Context.getLangOpts().ObjCAutoRefCount ||
-          Context.getLangOpts().getGC() == LangOptions::GCOnly) &&
-        MDecl->getMethodFamily() == OMF_dealloc;
-      getCurFunction()->ObjCShouldCallSuperFinalize =
-        Context.getLangOpts().getGC() != LangOptions::NonGC &&
-        MDecl->getMethodFamily() == OMF_finalize;
+      ObjCMethodFamily Family = MDecl->getMethodFamily();
+      if (Family == OMF_dealloc) {
+        if (!(getLangOpts().ObjCAutoRefCount ||
+              getLangOpts().getGC() == LangOptions::GCOnly))
+          getCurFunction()->ObjCShouldCallSuper = true;
+
+      } else if (Family == OMF_finalize) {
+        if (Context.getLangOpts().getGC() != LangOptions::NonGC)
+          getCurFunction()->ObjCShouldCallSuper = true;
+        
+      } else {
+        const ObjCMethodDecl *SuperMethod =
+          IC->getSuperClass()->lookupMethod(MDecl->getSelector(),
+                                            MDecl->isInstanceMethod());
+        getCurFunction()->ObjCShouldCallSuper = 
+          (SuperMethod && SuperMethod->hasAttr<ObjCRequiresSuperAttr>());
+      }
     }
   }
 }
@@ -510,7 +547,7 @@ ActOnStartClassInterface(SourceLocation AtInterfaceLoc,
 
   // Check then save referenced protocols.
   if (NumProtoRefs) {
-    IDecl->setProtocolList((ObjCProtocolDecl**)ProtoRefs, NumProtoRefs,
+    IDecl->setProtocolList((ObjCProtocolDecl*const*)ProtoRefs, NumProtoRefs,
                            ProtoLocs, Context);
     IDecl->setEndOfDefinitionLoc(EndProtoLoc);
   }
@@ -652,7 +689,7 @@ Sema::ActOnStartProtocolInterface(SourceLocation AtProtoInterfaceLoc,
 
   if (!err && NumProtoRefs ) {
     /// Check then save referenced protocols.
-    PDecl->setProtocolList((ObjCProtocolDecl**)ProtoRefs, NumProtoRefs,
+    PDecl->setProtocolList((ObjCProtocolDecl*const*)ProtoRefs, NumProtoRefs,
                            ProtoLocs, Context);
   }
 
@@ -819,11 +856,11 @@ ActOnStartCategoryInterface(SourceLocation AtInterfaceLoc,
   CurContext->addDecl(CDecl);
 
   if (NumProtoRefs) {
-    CDecl->setProtocolList((ObjCProtocolDecl**)ProtoRefs, NumProtoRefs, 
+    CDecl->setProtocolList((ObjCProtocolDecl*const*)ProtoRefs, NumProtoRefs, 
                            ProtoLocs, Context);
     // Protocols in the class extension belong to the class.
     if (CDecl->IsClassExtension())
-     IDecl->mergeClassExtensionProtocolList((ObjCProtocolDecl**)ProtoRefs, 
+     IDecl->mergeClassExtensionProtocolList((ObjCProtocolDecl*const*)ProtoRefs, 
                                             NumProtoRefs, Context); 
   }
 
@@ -1545,9 +1582,9 @@ void Sema::CheckProtocolMethodDefs(SourceLocation ImpLoc,
          E = PDecl->instmeth_end(); I != E; ++I) {
       ObjCMethodDecl *method = *I;
       if (method->getImplementationControl() != ObjCMethodDecl::Optional &&
-          !method->isSynthesized() && !InsMap.count(method->getSelector()) &&
-          (!Super ||
-           !Super->lookupInstanceMethod(method->getSelector()))) {
+          !method->isPropertyAccessor() &&
+          !InsMap.count(method->getSelector()) &&
+          (!Super || !Super->lookupInstanceMethod(method->getSelector()))) {
             // If a method is not implemented in the category implementation but
             // has been declared in its primary class, superclass,
             // or in one of their protocols, no need to issue the warning. 
@@ -1560,7 +1597,7 @@ void Sema::CheckProtocolMethodDefs(SourceLocation ImpLoc,
             if (ObjCMethodDecl *MethodInClass =
                   IDecl->lookupInstanceMethod(method->getSelector(), 
                                               true /*shallowCategoryLookup*/))
-              if (C || MethodInClass->isSynthesized())
+              if (C || MethodInClass->isPropertyAccessor())
                 continue;
             unsigned DIAG = diag::warn_unimplemented_protocol_method;
             if (Diags.getDiagnosticLevel(DIAG, ImpLoc)
@@ -1621,7 +1658,7 @@ void Sema::MatchAllMethodDeclarations(const SelectorSet &InsMap,
     if (InsMapSeen.count((*I)->getSelector()))
         continue;
     InsMapSeen.insert((*I)->getSelector());
-    if (!(*I)->isSynthesized() &&
+    if (!(*I)->isPropertyAccessor() &&
         !InsMap.count((*I)->getSelector())) {
       if (ImmediateClass)
         WarnUndefinedMethod(IMPDecl->getLocation(), *I, IncompleteImpl,
@@ -1638,7 +1675,7 @@ void Sema::MatchAllMethodDeclarations(const SelectorSet &InsMap,
         if (!WarnCategoryMethodImpl)
           WarnConflictingTypedMethods(ImpMethodDecl, MethodDecl,
                                       isa<ObjCProtocolDecl>(CDecl));
-        else if (!MethodDecl->isSynthesized())
+        else if (!MethodDecl->isPropertyAccessor())
           WarnExactTypedMethods(ImpMethodDecl, MethodDecl,
                                 isa<ObjCProtocolDecl>(CDecl));
       }
@@ -1672,14 +1709,26 @@ void Sema::MatchAllMethodDeclarations(const SelectorSet &InsMap,
   }
   
   if (ObjCInterfaceDecl *I = dyn_cast<ObjCInterfaceDecl> (CDecl)) {
-    // Also methods in class extensions need be looked at next.
-    for (const ObjCCategoryDecl *ClsExtDecl = I->getFirstClassExtension(); 
-         ClsExtDecl; ClsExtDecl = ClsExtDecl->getNextClassExtension())
-      MatchAllMethodDeclarations(InsMap, ClsMap, InsMapSeen, ClsMapSeen,
-                                 IMPDecl,
-                                 const_cast<ObjCCategoryDecl *>(ClsExtDecl), 
-                                 IncompleteImpl, false, 
-                                 WarnCategoryMethodImpl);
+    // when checking that methods in implementation match their declaration,
+    // i.e. when WarnCategoryMethodImpl is false, check declarations in class
+    // extension; as well as those in categories.
+    if (!WarnCategoryMethodImpl)
+      for (const ObjCCategoryDecl *CDeclChain = I->getCategoryList();
+           CDeclChain; CDeclChain = CDeclChain->getNextClassCategory())
+        MatchAllMethodDeclarations(InsMap, ClsMap, InsMapSeen, ClsMapSeen,
+                                   IMPDecl,
+                                   const_cast<ObjCCategoryDecl *>(CDeclChain),
+                                   IncompleteImpl, false,
+                                   WarnCategoryMethodImpl);
+    else 
+      // Also methods in class extensions need be looked at next.
+      for (const ObjCCategoryDecl *ClsExtDecl = I->getFirstClassExtension(); 
+           ClsExtDecl; ClsExtDecl = ClsExtDecl->getNextClassExtension())
+        MatchAllMethodDeclarations(InsMap, ClsMap, InsMapSeen, ClsMapSeen,
+                                   IMPDecl,
+                                   const_cast<ObjCCategoryDecl *>(ClsExtDecl), 
+                                   IncompleteImpl, false, 
+                                   WarnCategoryMethodImpl);
     
     // Check for any implementation of a methods declared in protocol.
     for (ObjCInterfaceDecl::all_protocol_iterator
@@ -2339,11 +2388,11 @@ Decl *Sema::ActOnAtEnd(Scope *S, SourceRange AtEnd,
                CExtDecl; CExtDecl = CExtDecl->getNextClassExtension()) {
             if (ObjCMethodDecl *GetterMethod =
                 CExtDecl->getInstanceMethod(Property->getGetterName()))
-              GetterMethod->setSynthesized(true);
+              GetterMethod->setPropertyAccessor(true);
             if (!Property->isReadOnly())
               if (ObjCMethodDecl *SetterMethod =
                   CExtDecl->getInstanceMethod(Property->getSetterName()))
-                SetterMethod->setSynthesized(true);
+                SetterMethod->setPropertyAccessor(true);
           }        
         }
       }
@@ -2435,26 +2484,49 @@ CvtQTToAstBitMask(ObjCDeclSpec::ObjCDeclQualifier PQTVal) {
 }
 
 static inline
+unsigned countAlignAttr(const AttrVec &A) {
+  unsigned count=0;
+  for (AttrVec::const_iterator i = A.begin(), e = A.end(); i != e; ++i)
+    if ((*i)->getKind() == attr::Aligned)
+      ++count;
+  return count;
+}
+
+static inline
 bool containsInvalidMethodImplAttribute(ObjCMethodDecl *IMD,
                                         const AttrVec &A) {
   // If method is only declared in implementation (private method),
   // No need to issue any diagnostics on method definition with attributes.
   if (!IMD)
     return false;
-
+  
   // method declared in interface has no attribute. 
-  // But implementation has attributes. This is invalid
+  // But implementation has attributes. This is invalid.
+  // Except when implementation has 'Align' attribute which is
+  // immaterial to method declared in interface.
   if (!IMD->hasAttrs())
-    return true;
+    return (A.size() > countAlignAttr(A));
 
   const AttrVec &D = IMD->getAttrs();
-  if (D.size() != A.size())
-    return true;
 
+  unsigned countAlignOnImpl = countAlignAttr(A);
+  if (!countAlignOnImpl && (A.size() != D.size()))
+    return true;
+  else if (countAlignOnImpl) {
+    unsigned countAlignOnDecl = countAlignAttr(D);
+    if (countAlignOnDecl && (A.size() != D.size()))
+      return true;
+    else if (!countAlignOnDecl && 
+             ((A.size()-countAlignOnImpl) != D.size()))
+      return true;
+  }
+  
   // attributes on method declaration and definition must match exactly.
   // Note that we have at most a couple of attributes on methods, so this
   // n*n search is good enough.
   for (AttrVec::const_iterator i = A.begin(), e = A.end(); i != e; ++i) {
+    if ((*i)->getKind() == attr::Aligned)
+      continue;
     bool match = false;
     for (AttrVec::const_iterator i1 = D.begin(), e1 = D.end(); i1 != e1; ++i1) {
       if ((*i)->getKind() == (*i1)->getKind()) {
@@ -2465,6 +2537,7 @@ bool containsInvalidMethodImplAttribute(ObjCMethodDecl *IMD,
     if (!match)
       return true;
   }
+  
   return false;
 }
 
@@ -2525,7 +2598,7 @@ public:
     // with this selector before.
     Sema::GlobalMethodPool::iterator it = S.MethodPool.find(selector);
     if (it == S.MethodPool.end()) {
-      if (!S.ExternalSource) return;
+      if (!S.getExternalSource()) return;
       S.ReadMethodPool(selector);
       
       it = S.MethodPool.find(selector);
@@ -2767,7 +2840,7 @@ Decl *Sema::ActOnMethodDeclaration(
                            ResultTInfo,
                            CurContext,
                            MethodType == tok::minus, isVariadic,
-                           /*isSynthesized=*/false,
+                           /*isPropertyAccessor=*/false,
                            /*isImplicitlyDeclared=*/false, /*isDefined=*/false,
                            MethodDeclKind == tok::objc_optional 
                              ? ObjCMethodDecl::Optional
diff --git a/lib/Sema/SemaExceptionSpec.cpp b/lib/Sema/SemaExceptionSpec.cpp
index e6266fb0863a..e1f4888d632f 100644
--- a/lib/Sema/SemaExceptionSpec.cpp
+++ b/lib/Sema/SemaExceptionSpec.cpp
@@ -120,6 +120,24 @@ Sema::ResolveExceptionSpec(SourceLocation Loc, const FunctionProtoType *FPT) {
   return SourceDecl->getType()->castAs<FunctionProtoType>();
 }
 
+/// Determine whether a function has an implicitly-generated exception
+/// specification.
+static bool hasImplicitExceptionSpec(FunctionDecl *Decl) {
+  if (!isa<CXXDestructorDecl>(Decl) &&
+      Decl->getDeclName().getCXXOverloadedOperator() != OO_Delete &&
+      Decl->getDeclName().getCXXOverloadedOperator() != OO_Array_Delete)
+    return false;
+
+  // If the user didn't declare the function, its exception specification must
+  // be implicit.
+  if (!Decl->getTypeSourceInfo())
+    return true;
+
+  const FunctionProtoType *Ty =
+    Decl->getTypeSourceInfo()->getType()->getAs<FunctionProtoType>();
+  return !Ty->hasExceptionSpec();
+}
+
 bool Sema::CheckEquivalentExceptionSpec(FunctionDecl *Old, FunctionDecl *New) {
   OverloadedOperatorKind OO = New->getDeclName().getCXXOverloadedOperator();
   bool IsOperatorNew = OO == OO_New || OO == OO_Array_New;
@@ -129,25 +147,35 @@ bool Sema::CheckEquivalentExceptionSpec(FunctionDecl *Old, FunctionDecl *New) {
   if (getLangOpts().MicrosoftExt)
     DiagID = diag::warn_mismatched_exception_spec; 
 
-  if (!CheckEquivalentExceptionSpec(PDiag(DiagID),
-                                    PDiag(diag::note_previous_declaration),
-                                    Old->getType()->getAs<FunctionProtoType>(),
-                                    Old->getLocation(),
-                                    New->getType()->getAs<FunctionProtoType>(),
-                                    New->getLocation(),
-                                    &MissingExceptionSpecification,
-                                    &MissingEmptyExceptionSpecification,
-                                    /*AllowNoexceptAllMatchWithNoSpec=*/true,
-                                    IsOperatorNew))
+  // Check the types as written: they must match before any exception
+  // specification adjustment is applied.
+  if (!CheckEquivalentExceptionSpec(
+        PDiag(DiagID), PDiag(diag::note_previous_declaration),
+        Old->getType()->getAs<FunctionProtoType>(), Old->getLocation(),
+        New->getType()->getAs<FunctionProtoType>(), New->getLocation(),
+        &MissingExceptionSpecification, &MissingEmptyExceptionSpecification,
+        /*AllowNoexceptAllMatchWithNoSpec=*/true, IsOperatorNew)) {
+    // C++11 [except.spec]p4 [DR1492]:
+    //   If a declaration of a function has an implicit
+    //   exception-specification, other declarations of the function shall
+    //   not specify an exception-specification.
+    if (getLangOpts().CPlusPlus0x &&
+        hasImplicitExceptionSpec(Old) != hasImplicitExceptionSpec(New)) {
+      Diag(New->getLocation(), diag::ext_implicit_exception_spec_mismatch)
+        << hasImplicitExceptionSpec(Old);
+      if (!Old->getLocation().isInvalid())
+        Diag(Old->getLocation(), diag::note_previous_declaration);
+    }
     return false;
+  }
 
   // The failure was something other than an empty exception
   // specification; return an error.
   if (!MissingExceptionSpecification && !MissingEmptyExceptionSpecification)
     return true;
 
-  const FunctionProtoType *NewProto 
-    = New->getType()->getAs<FunctionProtoType>();
+  const FunctionProtoType *NewProto =
+    New->getType()->getAs<FunctionProtoType>();
 
   // The new function declaration is only missing an empty exception
   // specification "throw()". If the throw() specification came from a
@@ -172,8 +200,8 @@ bool Sema::CheckEquivalentExceptionSpec(FunctionDecl *Old, FunctionDecl *New) {
   }
 
   if (MissingExceptionSpecification && NewProto) {
-    const FunctionProtoType *OldProto
-      = Old->getType()->getAs<FunctionProtoType>();
+    const FunctionProtoType *OldProto =
+      Old->getType()->getAs<FunctionProtoType>();
 
     FunctionProtoType::ExtProtoInfo EPI = NewProto->getExtProtoInfo();
     EPI.ExceptionSpecType = OldProto->getExceptionSpecType();
@@ -290,14 +318,17 @@ bool Sema::CheckEquivalentExceptionSpec(
   unsigned DiagID = diag::err_mismatched_exception_spec;
   if (getLangOpts().MicrosoftExt)
     DiagID = diag::warn_mismatched_exception_spec; 
-  return CheckEquivalentExceptionSpec(
-                                      PDiag(DiagID),
+  return CheckEquivalentExceptionSpec(PDiag(DiagID),
                                       PDiag(diag::note_previous_declaration),
                                       Old, OldLoc, New, NewLoc);
 }
 
 /// CheckEquivalentExceptionSpec - Check if the two types have compatible
 /// exception specifications. See C++ [except.spec]p3.
+///
+/// \return \c false if the exception specifications match, \c true if there is
+/// a problem. If \c true is returned, either a diagnostic has already been
+/// produced or \c *MissingExceptionSpecification is set to \c true.
 bool Sema::CheckEquivalentExceptionSpec(const PartialDiagnostic &DiagID,
                                         const PartialDiagnostic & NoteID,
                                         const FunctionProtoType *Old,
@@ -1029,6 +1060,7 @@ CanThrowResult Sema::canThrow(const Expr *E) {
   case Expr::PseudoObjectExprClass:
   case Expr::SubstNonTypeTemplateParmExprClass:
   case Expr::SubstNonTypeTemplateParmPackExprClass:
+  case Expr::FunctionParmPackExprClass:
   case Expr::UnaryExprOrTypeTraitExprClass:
   case Expr::UnresolvedLookupExprClass:
   case Expr::UnresolvedMemberExprClass:
diff --git a/lib/Sema/SemaExpr.cpp b/lib/Sema/SemaExpr.cpp
index 3875ba171366..bf4abfcb7460 100644
--- a/lib/Sema/SemaExpr.cpp
+++ b/lib/Sema/SemaExpr.cpp
@@ -66,6 +66,15 @@ bool Sema::CanUseDecl(NamedDecl *D) {
   return true;
 }
 
+static void DiagnoseUnusedOfDecl(Sema &S, NamedDecl *D, SourceLocation Loc) {
+  // Warn if this is used but marked unused.
+  if (D->hasAttr<UnusedAttr>()) {
+    const Decl *DC = cast<Decl>(S.getCurObjCLexicalContext());
+    if (!DC->hasAttr<UnusedAttr>())
+      S.Diag(Loc, diag::warn_used_but_marked_unused) << D->getDeclName();
+  }
+}
+
 static AvailabilityResult DiagnoseAvailabilityOfDecl(Sema &S,
                               NamedDecl *D, SourceLocation Loc,
                               const ObjCInterfaceDecl *UnknownObjCClass) {
@@ -78,6 +87,17 @@ static AvailabilityResult DiagnoseAvailabilityOfDecl(Sema &S,
       if (const EnumDecl *TheEnumDecl = dyn_cast<EnumDecl>(DC))
         Result = TheEnumDecl->getAvailability(&Message);
     }
+
+  const ObjCPropertyDecl *ObjCPDecl = 0;
+  if (Result == AR_Deprecated || Result == AR_Unavailable) {
+    if (const ObjCMethodDecl *MD = dyn_cast<ObjCMethodDecl>(D)) {
+      if (const ObjCPropertyDecl *PD = MD->findPropertyDecl()) {
+        AvailabilityResult PDeclResult = PD->getAvailability(0);
+        if (PDeclResult == Result)
+          ObjCPDecl = PD;
+      }
+    }
+  }
   
   switch (Result) {
     case AR_Available:
@@ -85,23 +105,30 @@ static AvailabilityResult DiagnoseAvailabilityOfDecl(Sema &S,
       break;
             
     case AR_Deprecated:
-      S.EmitDeprecationWarning(D, Message, Loc, UnknownObjCClass);
+      S.EmitDeprecationWarning(D, Message, Loc, UnknownObjCClass, ObjCPDecl);
       break;
             
     case AR_Unavailable:
       if (S.getCurContextAvailability() != AR_Unavailable) {
         if (Message.empty()) {
-          if (!UnknownObjCClass)
+          if (!UnknownObjCClass) {
             S.Diag(Loc, diag::err_unavailable) << D->getDeclName();
+            if (ObjCPDecl)
+              S.Diag(ObjCPDecl->getLocation(), diag::note_property_attribute)
+                << ObjCPDecl->getDeclName() << 1;
+          }
           else
             S.Diag(Loc, diag::warn_unavailable_fwdclass_message) 
               << D->getDeclName();
         }
-        else 
+        else
           S.Diag(Loc, diag::err_unavailable_message) 
             << D->getDeclName() << Message;
-          S.Diag(D->getLocation(), diag::note_unavailable_here) 
-          << isa<FunctionDecl>(D) << false;
+        S.Diag(D->getLocation(), diag::note_unavailable_here)
+                  << isa<FunctionDecl>(D) << false;
+        if (ObjCPDecl)
+          S.Diag(ObjCPDecl->getLocation(), diag::note_property_attribute)
+          << ObjCPDecl->getDeclName() << 1;
       }
       break;
     }
@@ -250,9 +277,7 @@ bool Sema::DiagnoseUseOfDecl(NamedDecl *D, SourceLocation Loc,
   }
   DiagnoseAvailabilityOfDecl(*this, D, Loc, UnknownObjCClass);
 
-  // Warn if this is used but marked unused.
-  if (D->hasAttr<UnusedAttr>())
-    Diag(Loc, diag::warn_used_but_marked_unused) << D->getDeclName();
+  DiagnoseUnusedOfDecl(*this, D, Loc);
 
   diagnoseUseOfInternalDeclInInlineFunction(*this, D, Loc);
 
@@ -502,7 +527,7 @@ ExprResult Sema::DefaultFunctionArrayLvalueConversion(Expr *E) {
   Res = DefaultLvalueConversion(Res.take());
   if (Res.isInvalid())
     return ExprError();
-  return move(Res);
+  return Res;
 }
 
 
@@ -1098,8 +1123,8 @@ Sema::ActOnGenericSelectionExpr(SourceLocation KeyLoc,
   unsigned NumAssocs = ArgTypes.size();
   assert(NumAssocs == ArgExprs.size());
 
-  ParsedType *ParsedTypes = ArgTypes.release();
-  Expr **Exprs = ArgExprs.release();
+  ParsedType *ParsedTypes = ArgTypes.data();
+  Expr **Exprs = ArgExprs.data();
 
   TypeSourceInfo **Types = new TypeSourceInfo*[NumAssocs];
   for (unsigned i = 0; i < NumAssocs; ++i) {
@@ -1185,8 +1210,9 @@ Sema::CreateGenericSelectionExpr(SourceLocation KeyLoc,
   if (IsResultDependent)
     return Owned(new (Context) GenericSelectionExpr(
                    Context, KeyLoc, ControllingExpr,
-                   Types, Exprs, NumAssocs, DefaultLoc,
-                   RParenLoc, ContainsUnexpandedParameterPack));
+                   llvm::makeArrayRef(Types, NumAssocs),
+                   llvm::makeArrayRef(Exprs, NumAssocs),
+                   DefaultLoc, RParenLoc, ContainsUnexpandedParameterPack));
 
   SmallVector<unsigned, 1> CompatIndices;
   unsigned DefaultIndex = -1U;
@@ -1240,8 +1266,9 @@ Sema::CreateGenericSelectionExpr(SourceLocation KeyLoc,
 
   return Owned(new (Context) GenericSelectionExpr(
                  Context, KeyLoc, ControllingExpr,
-                 Types, Exprs, NumAssocs, DefaultLoc,
-                 RParenLoc, ContainsUnexpandedParameterPack,
+                 llvm::makeArrayRef(Types, NumAssocs),
+                 llvm::makeArrayRef(Exprs, NumAssocs),
+                 DefaultLoc, RParenLoc, ContainsUnexpandedParameterPack,
                  ResultIndex));
 }
 
@@ -1402,6 +1429,15 @@ Sema::BuildDeclRefExpr(ValueDecl *D, QualType Ty, ExprValueKind VK,
 
   MarkDeclRefReferenced(E);
 
+  if (getLangOpts().ObjCARCWeak && isa<VarDecl>(D) &&
+      Ty.getObjCLifetime() == Qualifiers::OCL_Weak) {
+    DiagnosticsEngine::Level Level =
+      Diags.getDiagnosticLevel(diag::warn_arc_repeated_use_of_weak,
+                               E->getLocStart());
+    if (Level != DiagnosticsEngine::Ignored)
+      getCurFunction()->recordUseOfWeak(E);
+  }
+
   // Just in case we're building an illegal pointer-to-member.
   FieldDecl *FD = dyn_cast<FieldDecl>(D);
   if (FD && FD->isBitField())
@@ -1428,11 +1464,9 @@ Sema::DecomposeUnqualifiedId(const UnqualifiedId &Id,
     Buffer.setLAngleLoc(Id.TemplateId->LAngleLoc);
     Buffer.setRAngleLoc(Id.TemplateId->RAngleLoc);
 
-    ASTTemplateArgsPtr TemplateArgsPtr(*this,
-                                       Id.TemplateId->getTemplateArgs(),
+    ASTTemplateArgsPtr TemplateArgsPtr(Id.TemplateId->getTemplateArgs(),
                                        Id.TemplateId->NumArgs);
     translateTemplateArguments(TemplateArgsPtr, Buffer);
-    TemplateArgsPtr.release();
 
     TemplateName TName = Id.TemplateId->Template.get();
     SourceLocation TNameLoc = Id.TemplateId->TemplateNameLoc;
@@ -1606,7 +1640,8 @@ bool Sema::DiagnoseEmptyLookup(Scope *S, CXXScopeSpec &SS, LookupResult &R,
           Diag(R.getNameLoc(), diag::err_no_member_suggest)
             << Name << computeDeclContext(SS, false) << CorrectedQuotedStr
             << SS.getRange()
-            << FixItHint::CreateReplacement(R.getNameLoc(), CorrectedStr);
+            << FixItHint::CreateReplacement(Corrected.getCorrectionRange(),
+                                            CorrectedStr);
         if (ND)
           Diag(ND->getLocation(), diag::note_previous_decl)
             << CorrectedQuotedStr;
@@ -1797,7 +1832,7 @@ ExprResult Sema::ActOnIdExpression(Scope *S,
         // lookup fails and no expression will be built to reference it.
         if (!E.isInvalid() && !E.get())
           return ExprError();
-        return move(E);
+        return E;
       }
     }
   }
@@ -1860,9 +1895,10 @@ ExprResult Sema::ActOnIdExpression(Scope *S,
 /// this path.
 ExprResult
 Sema::BuildQualifiedDeclarationNameExpr(CXXScopeSpec &SS,
-                                        const DeclarationNameInfo &NameInfo) {
-  DeclContext *DC;
-  if (!(DC = computeDeclContext(SS, false)) || DC->isDependentContext())
+                                        const DeclarationNameInfo &NameInfo,
+                                        bool IsAddressOfOperand) {
+  DeclContext *DC = computeDeclContext(SS, false);
+  if (!DC)
     return BuildDependentDeclRefExpr(SS, /*TemplateKWLoc=*/SourceLocation(),
                                      NameInfo, /*TemplateArgs=*/0);
 
@@ -1875,13 +1911,26 @@ Sema::BuildQualifiedDeclarationNameExpr(CXXScopeSpec &SS,
   if (R.isAmbiguous())
     return ExprError();
 
+  if (R.getResultKind() == LookupResult::NotFoundInCurrentInstantiation)
+    return BuildDependentDeclRefExpr(SS, /*TemplateKWLoc=*/SourceLocation(),
+                                     NameInfo, /*TemplateArgs=*/0);
+
   if (R.empty()) {
     Diag(NameInfo.getLoc(), diag::err_no_member)
       << NameInfo.getName() << DC << SS.getRange();
     return ExprError();
   }
 
-  return BuildDeclarationNameExpr(SS, R, /*ADL*/ false);
+  // Defend against this resolving to an implicit member access. We usually
+  // won't get here if this might be a legitimate a class member (we end up in
+  // BuildMemberReferenceExpr instead), but this can be valid if we're forming
+  // a pointer-to-member or in an unevaluated context in C++11.
+  if (!R.empty() && (*R.begin())->isCXXClassMember() && !IsAddressOfOperand)
+    return BuildPossibleImplicitMemberExpr(SS,
+                                           /*TemplateKWLoc=*/SourceLocation(),
+                                           R, /*TemplateArgs=*/0);
+
+  return BuildDeclarationNameExpr(SS, R, /* ADL */ false);
 }
 
 /// LookupInObjCMethod - The parser has read a name in, and Sema has
@@ -1965,9 +2014,25 @@ Sema::LookupInObjCMethod(LookupResult &Lookup, Scope *S,
       ObjCMethodFamily MF = CurMethod->getMethodFamily();
       if (MF != OMF_init && MF != OMF_dealloc && MF != OMF_finalize)
         Diag(Loc, diag::warn_direct_ivar_access) << IV->getDeclName();
-      return Owned(new (Context)
-                   ObjCIvarRefExpr(IV, IV->getType(), Loc,
-                                   SelfExpr.take(), true, true));
+
+      ObjCIvarRefExpr *Result = new (Context) ObjCIvarRefExpr(IV, IV->getType(),
+                                                              Loc,
+                                                              SelfExpr.take(),
+                                                              true, true);
+
+      if (getLangOpts().ObjCAutoRefCount) {
+        if (IV->getType().getObjCLifetime() == Qualifiers::OCL_Weak) {
+          DiagnosticsEngine::Level Level =
+            Diags.getDiagnosticLevel(diag::warn_arc_repeated_use_of_weak, Loc);
+          if (Level != DiagnosticsEngine::Ignored)
+            getCurFunction()->recordUseOfWeak(Result);
+        }
+        if (CurContext->isClosure())
+          Diag(Loc, diag::warn_implicitly_retains_self)
+            << FixItHint::CreateInsertion(Loc, "self->");
+      }
+      
+      return Owned(Result);
     }
   } else if (CurMethod->isInstanceMethod()) {
     // We should warn if a local variable hides an ivar.
@@ -2416,6 +2481,14 @@ Sema::BuildDeclarationNameExpr(const CXXScopeSpec &SS,
     }
         
     case Decl::Function: {
+      if (unsigned BID = cast<FunctionDecl>(VD)->getBuiltinID()) {
+        if (!Context.BuiltinInfo.isPredefinedLibFunction(BID)) {
+          type = Context.BuiltinFnTy;
+          valueKind = VK_RValue;
+          break;
+        }
+      }
+
       const FunctionType *fty = type->castAs<FunctionType>();
 
       // If we're referring to a function with an __unknown_anytype
@@ -2615,19 +2688,20 @@ ExprResult Sema::ActOnNumericConstant(const Token &Tok, Scope *UDLScope) {
     return ActOnIntegerConstant(Tok.getLocation(), Val-'0');
   }
 
-  SmallString<512> IntegerBuffer;
-  // Add padding so that NumericLiteralParser can overread by one character.
-  IntegerBuffer.resize(Tok.getLength()+1);
-  const char *ThisTokBegin = &IntegerBuffer[0];
+  SmallString<128> SpellingBuffer;
+  // NumericLiteralParser wants to overread by one character.  Add padding to
+  // the buffer in case the token is copied to the buffer.  If getSpelling()
+  // returns a StringRef to the memory buffer, it should have a null char at
+  // the EOF, so it is also safe.
+  SpellingBuffer.resize(Tok.getLength() + 1);
 
   // Get the spelling of the token, which eliminates trigraphs, etc.
   bool Invalid = false;
-  unsigned ActualLength = PP.getSpelling(Tok, ThisTokBegin, &Invalid);
+  StringRef TokSpelling = PP.getSpelling(Tok, SpellingBuffer, &Invalid);
   if (Invalid)
     return ExprError();
 
-  NumericLiteralParser Literal(ThisTokBegin, ThisTokBegin+ActualLength,
-                               Tok.getLocation(), PP);
+  NumericLiteralParser Literal(TokSpelling, Tok.getLocation(), PP);
   if (Literal.hadError)
     return ExprError();
 
@@ -2693,7 +2767,7 @@ ExprResult Sema::ActOnNumericConstant(const Token &Tok, Scope *UDLScope) {
           Context.CharTy, llvm::APInt(32, Length + 1),
           ArrayType::Normal, 0);
       Expr *Lit = StringLiteral::Create(
-          Context, StringRef(ThisTokBegin, Length), StringLiteral::Ascii,
+          Context, StringRef(TokSpelling.data(), Length), StringLiteral::Ascii,
           /*Pascal*/false, StrTy, &TokLoc, 1);
       return BuildLiteralOperatorCall(R, OpNameInfo,
                                       llvm::makeArrayRef(&Lit, 1), TokLoc);
@@ -2709,7 +2783,7 @@ ExprResult Sema::ActOnNumericConstant(const Token &Tok, Scope *UDLScope) {
       bool CharIsUnsigned = Context.CharTy->isUnsignedIntegerType();
       llvm::APSInt Value(CharBits, CharIsUnsigned);
       for (unsigned I = 0, N = Literal.getUDSuffixOffset(); I != N; ++I) {
-        Value = ThisTokBegin[I];
+        Value = TokSpelling[I];
         TemplateArgument Arg(Context, Value, Context.CharTy);
         TemplateArgumentLocInfo ArgInfo;
         ExplicitArgs.addArgument(TemplateArgumentLoc(Arg, ArgInfo));
@@ -2747,11 +2821,15 @@ ExprResult Sema::ActOnNumericConstant(const Token &Tok, Scope *UDLScope) {
   } else {
     QualType Ty;
 
-    // long long is a C99 feature.
-    if (!getLangOpts().C99 && Literal.isLongLong)
-      Diag(Tok.getLocation(),
-           getLangOpts().CPlusPlus0x ?
-             diag::warn_cxx98_compat_longlong : diag::ext_longlong);
+    // 'long long' is a C99 or C++11 feature.
+    if (!getLangOpts().C99 && Literal.isLongLong) {
+      if (getLangOpts().CPlusPlus)
+        Diag(Tok.getLocation(),
+             getLangOpts().CPlusPlus0x ?
+             diag::warn_cxx98_compat_longlong : diag::ext_cxx11_longlong);
+      else
+        Diag(Tok.getLocation(), diag::ext_c99_longlong);
+    }
 
     // Get the value in the widest-possible width.
     unsigned MaxWidth = Context.getTargetInfo().getIntMaxTWidth();
@@ -3140,7 +3218,7 @@ Sema::ActOnUnaryExprOrTypeTraitExpr(SourceLocation OpLoc,
 
   Expr *ArgEx = (Expr *)TyOrEx;
   ExprResult Result = CreateUnaryExprOrTypeTraitExpr(ArgEx, OpLoc, ExprKind);
-  return move(Result);
+  return Result;
 }
 
 static QualType CheckRealImagOperand(Sema &S, ExprResult &V, SourceLocation Loc,
@@ -3167,7 +3245,7 @@ static QualType CheckRealImagOperand(Sema &S, ExprResult &V, SourceLocation Loc,
   ExprResult PR = S.CheckPlaceholderExpr(V.get());
   if (PR.isInvalid()) return QualType();
   if (PR.get() != V.get()) {
-    V = move(PR);
+    V = PR;
     return CheckRealImagOperand(S, V, Loc, IsReal);
   }
 
@@ -3442,8 +3520,7 @@ ExprResult Sema::BuildCXXDefaultArgExpr(SourceLocation CallLoc,
     Expr *ResultE = Result.takeAs<Expr>();
 
     InitializationSequence InitSeq(*this, Entity, Kind, &ResultE, 1);
-    Result = InitSeq.Perform(*this, Entity, Kind,
-                             MultiExprArg(*this, &ResultE, 1));
+    Result = InitSeq.Perform(*this, Entity, Kind, ResultE);
     if (Result.isInvalid())
       return ExprError();
 
@@ -3776,28 +3853,25 @@ ExprResult
 Sema::ActOnCallExpr(Scope *S, Expr *Fn, SourceLocation LParenLoc,
                     MultiExprArg ArgExprs, SourceLocation RParenLoc,
                     Expr *ExecConfig, bool IsExecConfig) {
-  unsigned NumArgs = ArgExprs.size();
-
   // Since this might be a postfix expression, get rid of ParenListExprs.
   ExprResult Result = MaybeConvertParenListExprToParenExpr(S, Fn);
   if (Result.isInvalid()) return ExprError();
   Fn = Result.take();
 
-  Expr **Args = ArgExprs.release();
-
   if (getLangOpts().CPlusPlus) {
     // If this is a pseudo-destructor expression, build the call immediately.
     if (isa<CXXPseudoDestructorExpr>(Fn)) {
-      if (NumArgs > 0) {
+      if (!ArgExprs.empty()) {
         // Pseudo-destructor calls should not have any arguments.
         Diag(Fn->getLocStart(), diag::err_pseudo_dtor_call_with_args)
           << FixItHint::CreateRemoval(
-                                    SourceRange(Args[0]->getLocStart(),
-                                                Args[NumArgs-1]->getLocEnd()));
+                                    SourceRange(ArgExprs[0]->getLocStart(),
+                                                ArgExprs.back()->getLocEnd()));
       }
 
-      return Owned(new (Context) CallExpr(Context, Fn, 0, 0, Context.VoidTy,
-                                          VK_RValue, RParenLoc));
+      return Owned(new (Context) CallExpr(Context, Fn, MultiExprArg(),
+                                          Context.VoidTy, VK_RValue,
+                                          RParenLoc));
     }
 
     // Determine whether this is a dependent call inside a C++ template,
@@ -3807,17 +3881,16 @@ Sema::ActOnCallExpr(Scope *S, Expr *Fn, SourceLocation LParenLoc,
     bool Dependent = false;
     if (Fn->isTypeDependent())
       Dependent = true;
-    else if (Expr::hasAnyTypeDependentArguments(
-        llvm::makeArrayRef(Args, NumArgs)))
+    else if (Expr::hasAnyTypeDependentArguments(ArgExprs))
       Dependent = true;
 
     if (Dependent) {
       if (ExecConfig) {
         return Owned(new (Context) CUDAKernelCallExpr(
-            Context, Fn, cast<CallExpr>(ExecConfig), Args, NumArgs,
+            Context, Fn, cast<CallExpr>(ExecConfig), ArgExprs,
             Context.DependentTy, VK_RValue, RParenLoc));
       } else {
-        return Owned(new (Context) CallExpr(Context, Fn, Args, NumArgs,
+        return Owned(new (Context) CallExpr(Context, Fn, ArgExprs,
                                             Context.DependentTy, VK_RValue,
                                             RParenLoc));
       }
@@ -3825,8 +3898,9 @@ Sema::ActOnCallExpr(Scope *S, Expr *Fn, SourceLocation LParenLoc,
 
     // Determine whether this is a call to an object (C++ [over.call.object]).
     if (Fn->getType()->isRecordType())
-      return Owned(BuildCallToObjectOfClassType(S, Fn, LParenLoc, Args, NumArgs,
-                                                RParenLoc));
+      return Owned(BuildCallToObjectOfClassType(S, Fn, LParenLoc,
+                                                ArgExprs.data(),
+                                                ArgExprs.size(), RParenLoc));
 
     if (Fn->getType() == Context.UnknownAnyTy) {
       ExprResult result = rebuildUnknownAnyFunction(*this, Fn);
@@ -3835,8 +3909,8 @@ Sema::ActOnCallExpr(Scope *S, Expr *Fn, SourceLocation LParenLoc,
     }
 
     if (Fn->getType() == Context.BoundMemberTy) {
-      return BuildCallToMemberFunction(S, Fn, LParenLoc, Args, NumArgs,
-                                       RParenLoc);
+      return BuildCallToMemberFunction(S, Fn, LParenLoc, ArgExprs.data(),
+                                       ArgExprs.size(), RParenLoc);
     }
   }
 
@@ -3849,11 +3923,11 @@ Sema::ActOnCallExpr(Scope *S, Expr *Fn, SourceLocation LParenLoc,
       OverloadExpr *ovl = find.Expression;
       if (isa<UnresolvedLookupExpr>(ovl)) {
         UnresolvedLookupExpr *ULE = cast<UnresolvedLookupExpr>(ovl);
-        return BuildOverloadedCallExpr(S, Fn, ULE, LParenLoc, Args, NumArgs,
-                                       RParenLoc, ExecConfig);
+        return BuildOverloadedCallExpr(S, Fn, ULE, LParenLoc, ArgExprs.data(),
+                                       ArgExprs.size(), RParenLoc, ExecConfig);
       } else {
-        return BuildCallToMemberFunction(S, Fn, LParenLoc, Args, NumArgs,
-                                         RParenLoc);
+        return BuildCallToMemberFunction(S, Fn, LParenLoc, ArgExprs.data(),
+                                         ArgExprs.size(), RParenLoc);
       }
     }
   }
@@ -3877,8 +3951,9 @@ Sema::ActOnCallExpr(Scope *S, Expr *Fn, SourceLocation LParenLoc,
   else if (isa<MemberExpr>(NakedFn))
     NDecl = cast<MemberExpr>(NakedFn)->getMemberDecl();
 
-  return BuildResolvedCallExpr(Fn, NDecl, LParenLoc, Args, NumArgs, RParenLoc,
-                               ExecConfig, IsExecConfig);
+  return BuildResolvedCallExpr(Fn, NDecl, LParenLoc, ArgExprs.data(),
+                               ArgExprs.size(), RParenLoc, ExecConfig,
+                               IsExecConfig);
 }
 
 ExprResult
@@ -3932,9 +4007,19 @@ Sema::BuildResolvedCallExpr(Expr *Fn, NamedDecl *NDecl,
                             SourceLocation RParenLoc,
                             Expr *Config, bool IsExecConfig) {
   FunctionDecl *FDecl = dyn_cast_or_null<FunctionDecl>(NDecl);
+  unsigned BuiltinID = (FDecl ? FDecl->getBuiltinID() : 0);
 
   // Promote the function operand.
-  ExprResult Result = UsualUnaryConversions(Fn);
+  // We special-case function promotion here because we only allow promoting
+  // builtin functions to function pointers in the callee of a call.
+  ExprResult Result;
+  if (BuiltinID &&
+      Fn->getType()->isSpecificBuiltinType(BuiltinType::BuiltinFn)) {
+    Result = ImpCastExprToType(Fn, Context.getPointerType(FDecl->getType()),
+                               CK_BuiltinFnToFnPtr).take();
+  } else {
+    Result = UsualUnaryConversions(Fn);
+  }
   if (Result.isInvalid())
     return ExprError();
   Fn = Result.take();
@@ -3945,19 +4030,17 @@ Sema::BuildResolvedCallExpr(Expr *Fn, NamedDecl *NDecl,
   if (Config)
     TheCall = new (Context) CUDAKernelCallExpr(Context, Fn,
                                                cast<CallExpr>(Config),
-                                               Args, NumArgs,
+                                               llvm::makeArrayRef(Args,NumArgs),
                                                Context.BoolTy,
                                                VK_RValue,
                                                RParenLoc);
   else
     TheCall = new (Context) CallExpr(Context, Fn,
-                                     Args, NumArgs,
+                                     llvm::makeArrayRef(Args, NumArgs),
                                      Context.BoolTy,
                                      VK_RValue,
                                      RParenLoc);
 
-  unsigned BuiltinID = (FDecl ? FDecl->getBuiltinID() : 0);
-
   // Bail out early if calling a builtin with custom typechecking.
   if (BuiltinID && Context.BuiltinInfo.hasCustomTypechecking(BuiltinID))
     return CheckBuiltinFunctionCall(BuiltinID, TheCall);
@@ -4143,9 +4226,8 @@ Sema::BuildCompoundLiteralExpr(SourceLocation LParenLoc, TypeSourceInfo *TInfo,
                                            SourceRange(LParenLoc, RParenLoc),
                                            /*InitList=*/true);
   InitializationSequence InitSeq(*this, Entity, Kind, &LiteralExpr, 1);
-  ExprResult Result = InitSeq.Perform(*this, Entity, Kind,
-                                       MultiExprArg(*this, &LiteralExpr, 1),
-                                            &literalType);
+  ExprResult Result = InitSeq.Perform(*this, Entity, Kind, LiteralExpr,
+                                      &literalType);
   if (Result.isInvalid())
     return ExprError();
   LiteralExpr = Result.get();
@@ -4167,28 +4249,25 @@ Sema::BuildCompoundLiteralExpr(SourceLocation LParenLoc, TypeSourceInfo *TInfo,
 ExprResult
 Sema::ActOnInitList(SourceLocation LBraceLoc, MultiExprArg InitArgList,
                     SourceLocation RBraceLoc) {
-  unsigned NumInit = InitArgList.size();
-  Expr **InitList = InitArgList.release();
-
   // Immediately handle non-overload placeholders.  Overloads can be
   // resolved contextually, but everything else here can't.
-  for (unsigned I = 0; I != NumInit; ++I) {
-    if (InitList[I]->getType()->isNonOverloadPlaceholderType()) {
-      ExprResult result = CheckPlaceholderExpr(InitList[I]);
+  for (unsigned I = 0, E = InitArgList.size(); I != E; ++I) {
+    if (InitArgList[I]->getType()->isNonOverloadPlaceholderType()) {
+      ExprResult result = CheckPlaceholderExpr(InitArgList[I]);
 
       // Ignore failures; dropping the entire initializer list because
       // of one failure would be terrible for indexing/etc.
       if (result.isInvalid()) continue;
 
-      InitList[I] = result.take();
+      InitArgList[I] = result.take();
     }
   }
 
   // Semantic analysis for initializers is done by ActOnDeclarator() and
   // CheckInitializer() - it requires knowledge of the object being intialized.
 
-  InitListExpr *E = new (Context) InitListExpr(Context, LBraceLoc, InitList,
-                                               NumInit, RBraceLoc);
+  InitListExpr *E = new (Context) InitListExpr(Context, LBraceLoc, InitArgList,
+                                               RBraceLoc);
   E->setType(Context.VoidTy); // FIXME: just a place holder for now.
   return Owned(E);
 }
@@ -4575,8 +4654,7 @@ ExprResult Sema::BuildVectorLiteral(SourceLocation LParenLoc,
   // FIXME: This means that pretty-printing the final AST will produce curly
   // braces instead of the original commas.
   InitListExpr *initE = new (Context) InitListExpr(Context, LParenLoc,
-                                                   &initExprs[0],
-                                                   initExprs.size(), RParenLoc);
+                                                   initExprs, RParenLoc);
   initE->setType(Ty);
   return BuildCompoundLiteralExpr(LParenLoc, TInfo, RParenLoc, initE);
 }
@@ -4603,10 +4681,8 @@ Sema::MaybeConvertParenListExprToParenExpr(Scope *S, Expr *OrigExpr) {
 ExprResult Sema::ActOnParenListExpr(SourceLocation L,
                                     SourceLocation R,
                                     MultiExprArg Val) {
-  unsigned nexprs = Val.size();
-  Expr **exprs = reinterpret_cast<Expr**>(Val.release());
-  assert((exprs != 0) && "ActOnParenOrParenListExpr() missing expr list");
-  Expr *expr = new (Context) ParenListExpr(Context, L, exprs, nexprs, R);
+  assert(Val.data() != 0 && "ActOnParenOrParenListExpr() missing expr list");
+  Expr *expr = new (Context) ParenListExpr(Context, L, Val, R);
   return Owned(expr);
 }
 
@@ -4884,11 +4960,11 @@ QualType Sema::CheckConditionalOperands(ExprResult &Cond, ExprResult &LHS,
 
   ExprResult LHSResult = CheckPlaceholderExpr(LHS.get());
   if (!LHSResult.isUsable()) return QualType();
-  LHS = move(LHSResult);
+  LHS = LHSResult;
 
   ExprResult RHSResult = CheckPlaceholderExpr(RHS.get());
   if (!RHSResult.isUsable()) return QualType();
-  RHS = move(RHSResult);
+  RHS = RHSResult;
 
   // C++ is sufficiently different to merit its own checker.
   if (getLangOpts().CPlusPlus)
@@ -5247,7 +5323,7 @@ static void DiagnoseConditionalPrecedence(Sema &Self,
       << BinaryOperator::getOpcodeStr(CondOpcode);
 
   SuggestParentheses(Self, OpLoc,
-    Self.PDiag(diag::note_precedence_conditional_silence)
+    Self.PDiag(diag::note_precedence_silence)
       << BinaryOperator::getOpcodeStr(CondOpcode),
     SourceRange(Condition->getLocStart(), Condition->getLocEnd()));
 
@@ -5811,8 +5887,7 @@ static void ConstructTransparentUnion(Sema &S, ASTContext &C,
   // of the transparent union.
   Expr *E = EResult.take();
   InitListExpr *Initializer = new (C) InitListExpr(C, SourceLocation(),
-                                                   &E, 1,
-                                                   SourceLocation());
+                                                   E, SourceLocation());
   Initializer->setType(UnionType);
   Initializer->setInitializedFieldInUnion(Field);
 
@@ -5910,7 +5985,7 @@ Sema::CheckSingleAssignmentConstraints(QualType LHSType, ExprResult &RHS,
           !CheckObjCARCUnavailableWeakConversion(LHSType,
                                                  RHS.get()->getType()))
         result = IncompatibleObjCWeakRef;
-      RHS = move(Res);
+      RHS = Res;
       return result;
     }
 
@@ -6708,7 +6783,7 @@ static void diagnoseFunctionPointerToVoidComparison(Sema &S, SourceLocation Loc,
 }
 
 static bool isObjCObjectLiteral(ExprResult &E) {
-  switch (E.get()->getStmtClass()) {
+  switch (E.get()->IgnoreParenImpCasts()->getStmtClass()) {
   case Stmt::ObjCArrayLiteralClass:
   case Stmt::ObjCDictionaryLiteralClass:
   case Stmt::ObjCStringLiteralClass:
@@ -6800,6 +6875,7 @@ static void diagnoseObjCLiteralComparison(Sema &S, SourceLocation Loc,
     LK_String
   } LiteralKind;
 
+  Literal = Literal->IgnoreParenImpCasts();
   switch (Literal->getStmtClass()) {
   case Stmt::ObjCStringLiteralClass:
     // "string literal"
@@ -7202,7 +7278,10 @@ QualType Sema::CheckCompareOperands(ExprResult &LHS, ExprResult &RHS,
       (LHSType->isIntegerType() && RHSType->isAnyPointerType())) {
     unsigned DiagID = 0;
     bool isError = false;
-    if ((LHSIsNull && LHSType->isIntegerType()) ||
+    if (LangOpts.DebuggerSupport) {
+      // Under a debugger, allow the comparison of pointers to integers,
+      // since users tend to want to compare addresses.
+    } else if ((LHSIsNull && LHSType->isIntegerType()) ||
         (RHSIsNull && RHSType->isIntegerType())) {
       if (IsRelational && !getLangOpts().CPlusPlus)
         DiagID = diag::ext_typecheck_ordered_comparison_of_pointer_and_zero;
@@ -7419,12 +7498,12 @@ inline QualType Sema::CheckLogicalOperands( // C99 6.5.[13,14]
   ExprResult LHSRes = PerformContextuallyConvertToBool(LHS.get());
   if (LHSRes.isInvalid())
     return InvalidOperands(Loc, LHS, RHS);
-  LHS = move(LHSRes);
+  LHS = LHSRes;
 
   ExprResult RHSRes = PerformContextuallyConvertToBool(RHS.get());
   if (RHSRes.isInvalid())
     return InvalidOperands(Loc, LHS, RHS);
-  RHS = move(RHSRes);
+  RHS = RHSRes;
 
   // C++ [expr.log.and]p2
   // C++ [expr.log.or]p2
@@ -7683,10 +7762,31 @@ QualType Sema::CheckAssignmentOperands(Expr *LHSExpr, ExprResult &RHS,
     }
 
     if (ConvTy == Compatible) {
-      if (LHSType.getObjCLifetime() == Qualifiers::OCL_Strong)
-        checkRetainCycles(LHSExpr, RHS.get());
-      else if (getLangOpts().ObjCAutoRefCount)
+      if (LHSType.getObjCLifetime() == Qualifiers::OCL_Strong) {
+        // Warn about retain cycles where a block captures the LHS, but
+        // not if the LHS is a simple variable into which the block is
+        // being stored...unless that variable can be captured by reference!
+        const Expr *InnerLHS = LHSExpr->IgnoreParenCasts();
+        const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(InnerLHS);
+        if (!DRE || DRE->getDecl()->hasAttr<BlocksAttr>())
+          checkRetainCycles(LHSExpr, RHS.get());
+
+        // It is safe to assign a weak reference into a strong variable.
+        // Although this code can still have problems:
+        //   id x = self.weakProp;
+        //   id y = self.weakProp;
+        // we do not warn to warn spuriously when 'x' and 'y' are on separate
+        // paths through the function. This should be revisited if
+        // -Wrepeated-use-of-weak is made flow-sensitive.
+        DiagnosticsEngine::Level Level =
+          Diags.getDiagnosticLevel(diag::warn_arc_repeated_use_of_weak,
+                                   RHS.get()->getLocStart());
+        if (Level != DiagnosticsEngine::Ignored)
+          getCurFunction()->markSafeWeakUse(RHS.get());
+
+      } else if (getLangOpts().ObjCAutoRefCount) {
         checkUnsafeExprAssigns(Loc, LHSExpr, RHS.get());
+      }
     }
   } else {
     // Compound assignment "x += y"
@@ -7972,8 +8072,16 @@ static QualType CheckAddressOfOperand(Sema &S, ExprResult &OrigOp,
 
     // The method was named without a qualifier.
     } else if (!DRE->getQualifier()) {
-      S.Diag(OpLoc, diag::err_unqualified_pointer_member_function)
-        << op->getSourceRange();
+      if (MD->getParent()->getName().empty())
+        S.Diag(OpLoc, diag::err_unqualified_pointer_member_function)
+          << op->getSourceRange();
+      else {
+        SmallString<32> Str;
+        StringRef Qual = (MD->getParent()->getName() + "::").toStringRef(Str);
+        S.Diag(OpLoc, diag::err_unqualified_pointer_member_function)
+          << op->getSourceRange()
+          << FixItHint::CreateInsertion(op->getSourceRange().getBegin(), Qual);
+      }
     }
 
     return S.Context.getMemberPointerType(op->getType(),
@@ -8216,8 +8324,7 @@ ExprResult Sema::CreateBuiltinBinOp(SourceLocation OpLoc,
     InitializedEntity Entity =
         InitializedEntity::InitializeTemporary(LHSExpr->getType());
     InitializationSequence InitSeq(*this, Entity, Kind, &RHSExpr, 1);
-    ExprResult Init = InitSeq.Perform(*this, Entity, Kind,
-                                      MultiExprArg(&RHSExpr, 1));
+    ExprResult Init = InitSeq.Perform(*this, Entity, Kind, RHSExpr);
     if (Init.isInvalid())
       return Init;
     RHSExpr = Init.take();
@@ -8340,7 +8447,8 @@ ExprResult Sema::CreateBuiltinBinOp(SourceLocation OpLoc,
 
   if (CompResultTy.isNull())
     return Owned(new (Context) BinaryOperator(LHS.take(), RHS.take(), Opc,
-                                              ResultTy, VK, OK, OpLoc));
+                                              ResultTy, VK, OK, OpLoc,
+                                              FPFeatures.fp_contract));
   if (getLangOpts().CPlusPlus && LHS.get()->getObjectKind() !=
       OK_ObjCProperty) {
     VK = VK_LValue;
@@ -8348,7 +8456,8 @@ ExprResult Sema::CreateBuiltinBinOp(SourceLocation OpLoc,
   }
   return Owned(new (Context) CompoundAssignOperator(LHS.take(), RHS.take(), Opc,
                                                     ResultTy, VK, OK, CompLHSTy,
-                                                    CompResultTy, OpLoc));
+                                                    CompResultTy, OpLoc,
+                                                    FPFeatures.fp_contract));
 }
 
 /// DiagnoseBitwisePrecedence - Emit a warning when bitwise and comparison
@@ -8383,8 +8492,8 @@ static void DiagnoseBitwisePrecedence(Sema &Self, BinaryOperatorKind Opc,
   SourceRange DiagRange = isLeftComp ? SourceRange(LHSExpr->getLocStart(),
                                                    OpLoc)
                                      : SourceRange(OpLoc, RHSExpr->getLocEnd());
-  std::string OpStr = isLeftComp ? BinOp::getOpcodeStr(LHSopc)
-                                 : BinOp::getOpcodeStr(RHSopc);
+  StringRef OpStr = isLeftComp ? BinOp::getOpcodeStr(LHSopc)
+                               : BinOp::getOpcodeStr(RHSopc);
   SourceRange ParensRange = isLeftComp ?
       SourceRange(cast<BinOp>(LHSExpr)->getRHS()->getLocStart(),
                   RHSExpr->getLocEnd())
@@ -8394,7 +8503,7 @@ static void DiagnoseBitwisePrecedence(Sema &Self, BinaryOperatorKind Opc,
   Self.Diag(OpLoc, diag::warn_precedence_bitwise_rel)
     << DiagRange << BinOp::getOpcodeStr(Opc) << OpStr;
   SuggestParentheses(Self, OpLoc,
-    Self.PDiag(diag::note_precedence_bitwise_silence) << OpStr,
+    Self.PDiag(diag::note_precedence_silence) << OpStr,
     (isLeftComp ? LHSExpr : RHSExpr)->getSourceRange());
   SuggestParentheses(Self, OpLoc,
     Self.PDiag(diag::note_precedence_bitwise_first) << BinOp::getOpcodeStr(Opc),
@@ -8411,7 +8520,8 @@ EmitDiagnosticForBitwiseAndInBitwiseOr(Sema &Self, SourceLocation OpLoc,
   Self.Diag(Bop->getOperatorLoc(), diag::warn_bitwise_and_in_bitwise_or)
       << Bop->getSourceRange() << OpLoc;
   SuggestParentheses(Self, Bop->getOperatorLoc(),
-    Self.PDiag(diag::note_bitwise_and_in_bitwise_or_silence),
+    Self.PDiag(diag::note_precedence_silence)
+      << Bop->getOpcodeStr(),
     Bop->getSourceRange());
 }
 
@@ -8425,7 +8535,8 @@ EmitDiagnosticForLogicalAndInLogicalOr(Sema &Self, SourceLocation OpLoc,
   Self.Diag(Bop->getOperatorLoc(), diag::warn_logical_and_in_logical_or)
       << Bop->getSourceRange() << OpLoc;
   SuggestParentheses(Self, Bop->getOperatorLoc(),
-    Self.PDiag(diag::note_logical_and_in_logical_or_silence),
+    Self.PDiag(diag::note_precedence_silence)
+      << Bop->getOpcodeStr(),
     Bop->getSourceRange());
 }
 
@@ -8489,6 +8600,20 @@ static void DiagnoseBitwiseAndInBitwiseOr(Sema &S, SourceLocation OpLoc,
   }
 }
 
+static void DiagnoseAdditionInShift(Sema &S, SourceLocation OpLoc,
+                                    Expr *SubExpr, StringRef Shift) {
+  if (BinaryOperator *Bop = dyn_cast<BinaryOperator>(SubExpr)) {
+    if (Bop->getOpcode() == BO_Add || Bop->getOpcode() == BO_Sub) {
+      StringRef Op = Bop->getOpcodeStr();
+      S.Diag(Bop->getOperatorLoc(), diag::warn_addition_in_bitshift)
+          << Bop->getSourceRange() << OpLoc << Shift << Op;
+      SuggestParentheses(S, Bop->getOperatorLoc(),
+          S.PDiag(diag::note_precedence_silence) << Op,
+          Bop->getSourceRange());
+    }
+  }
+}
+
 /// DiagnoseBinOpPrecedence - Emit warnings for expressions with tricky
 /// precedence.
 static void DiagnoseBinOpPrecedence(Sema &Self, BinaryOperatorKind Opc,
@@ -8510,6 +8635,13 @@ static void DiagnoseBinOpPrecedence(Sema &Self, BinaryOperatorKind Opc,
     DiagnoseLogicalAndInLogicalOrLHS(Self, OpLoc, LHSExpr, RHSExpr);
     DiagnoseLogicalAndInLogicalOrRHS(Self, OpLoc, LHSExpr, RHSExpr);
   }
+
+  if ((Opc == BO_Shl && LHSExpr->getType()->isIntegralType(Self.getASTContext()))
+      || Opc == BO_Shr) {
+    StringRef Shift = BinaryOperator::getOpcodeStr(Opc);
+    DiagnoseAdditionInShift(Self, OpLoc, LHSExpr, Shift);
+    DiagnoseAdditionInShift(Self, OpLoc, RHSExpr, Shift);
+  }
 }
 
 // Binary Operators.  'Tok' is the token for the operator.
@@ -8647,6 +8779,7 @@ ExprResult Sema::CreateBuiltinUnaryOp(SourceLocation OpLoc,
     break;
   case UO_Deref: {
     Input = DefaultFunctionArrayLvalueConversion(Input.take());
+    if (Input.isInvalid()) return ExprError();
     resultType = CheckIndirectionOperand(*this, Input.get(), VK, OpLoc);
     break;
   }
@@ -9147,8 +9280,7 @@ ExprResult Sema::BuildBuiltinOffsetOf(SourceLocation BuiltinLoc,
   }
   
   return Owned(OffsetOfExpr::Create(Context, Context.getSizeType(), BuiltinLoc, 
-                                    TInfo, Comps.data(), Comps.size(),
-                                    Exprs.data(), Exprs.size(), RParenLoc));  
+                                    TInfo, Comps, Exprs, RParenLoc));
 }
 
 ExprResult Sema::ActOnBuiltinOffsetOf(Scope *S,
@@ -9526,6 +9658,16 @@ ExprResult Sema::BuildVAArgExpr(SourceLocation BuiltinLoc,
     if (Result.isInvalid())
       return ExprError();
     E = Result.take();
+  } else if (VaListType->isRecordType() && getLangOpts().CPlusPlus) {
+    // If va_list is a record type and we are compiling in C++ mode,
+    // check the argument using reference binding.
+    InitializedEntity Entity
+      = InitializedEntity::InitializeParameter(Context,
+          Context.getLValueReferenceType(VaListType), false);
+    ExprResult Init = PerformCopyInitialization(Entity, SourceLocation(), E);
+    if (Init.isInvalid())
+      return ExprError();
+    E = Init.takeAs<Expr>();
   } else {
     // Otherwise, the va_list argument must be an l-value because
     // it is modified by va_arg.
@@ -10094,6 +10236,14 @@ Sema::PushExpressionEvaluationContext(ExpressionEvaluationContext NewContext,
     std::swap(MaybeODRUseExprs, ExprEvalContexts.back().SavedMaybeODRUseExprs);
 }
 
+void
+Sema::PushExpressionEvaluationContext(ExpressionEvaluationContext NewContext,
+                                      ReuseLambdaContextDecl_t,
+                                      bool IsDecltype) {
+  Decl *LambdaContextDecl = ExprEvalContexts.back().LambdaContextDecl;
+  PushExpressionEvaluationContext(NewContext, LambdaContextDecl, IsDecltype);
+}
+
 void Sema::PopExpressionEvaluationContext() {
   ExpressionEvaluationContextRecord& Rec = ExprEvalContexts.back();
 
@@ -10191,15 +10341,44 @@ void Sema::MarkFunctionReferenced(SourceLocation Loc, FunctionDecl *Func) {
 
   Func->setReferenced();
 
-  // Don't mark this function as used multiple times, unless it's a constexpr
-  // function which we need to instantiate.
-  if (Func->isUsed(false) &&
-      !(Func->isConstexpr() && !Func->getBody() &&
-        Func->isImplicitlyInstantiable()))
-    return;
-
-  if (!IsPotentiallyEvaluatedContext(*this))
-    return;
+  // C++11 [basic.def.odr]p3:
+  //   A function whose name appears as a potentially-evaluated expression is
+  //   odr-used if it is the unique lookup result or the selected member of a
+  //   set of overloaded functions [...].
+  //
+  // We (incorrectly) mark overload resolution as an unevaluated context, so we
+  // can just check that here. Skip the rest of this function if we've already
+  // marked the function as used.
+  if (Func->isUsed(false) || !IsPotentiallyEvaluatedContext(*this)) {
+    // C++11 [temp.inst]p3:
+    //   Unless a function template specialization has been explicitly
+    //   instantiated or explicitly specialized, the function template
+    //   specialization is implicitly instantiated when the specialization is
+    //   referenced in a context that requires a function definition to exist.
+    //
+    // We consider constexpr function templates to be referenced in a context
+    // that requires a definition to exist whenever they are referenced.
+    //
+    // FIXME: This instantiates constexpr functions too frequently. If this is
+    // really an unevaluated context (and we're not just in the definition of a
+    // function template or overload resolution or other cases which we
+    // incorrectly consider to be unevaluated contexts), and we're not in a
+    // subexpression which we actually need to evaluate (for instance, a
+    // template argument, array bound or an expression in a braced-init-list),
+    // we are not permitted to instantiate this constexpr function definition.
+    //
+    // FIXME: This also implicitly defines special members too frequently. They
+    // are only supposed to be implicitly defined if they are odr-used, but they
+    // are not odr-used from constant expressions in unevaluated contexts.
+    // However, they cannot be referenced if they are deleted, and they are
+    // deleted whenever the implicit definition of the special member would
+    // fail.
+    if (!Func->isConstexpr() || Func->getBody())
+      return;
+    CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(Func);
+    if (!Func->isImplicitlyInstantiable() && (!MD || MD->isUserProvided()))
+      return;
+  }
 
   // Note that this declaration has been used.
   if (CXXConstructorDecl *Constructor = dyn_cast<CXXConstructorDecl>(Func)) {
@@ -10469,8 +10648,7 @@ static ExprResult captureInLambda(Sema &S, LambdaScopeInfo *LSI,
   InitializationSequence Init(S, Entities.back(), InitKind, &Ref, 1);
   ExprResult Result(true);
   if (!Init.Diagnose(S, Entities.back(), InitKind, &Ref, 1))
-    Result = Init.Perform(S, Entities.back(), InitKind, 
-                          MultiExprArg(S, &Ref, 1));
+    Result = Init.Perform(S, Entities.back(), InitKind, Ref);
 
   // If this initialization requires any cleanups (e.g., due to a
   // default argument to a copy constructor), note that for the
@@ -10886,20 +11064,21 @@ static void DoMarkVarDeclReferenced(Sema &SemaRef, SourceLocation Loc,
     }
   }
 
-  // Per C++11 [basic.def.odr], a variable is odr-used "unless it is 
-  // an object that satisfies the requirements for appearing in a
-  // constant expression (5.19) and the lvalue-to-rvalue conversion (4.1)
+  // Per C++11 [basic.def.odr], a variable is odr-used "unless it satisfies
+  // the requirements for appearing in a constant expression (5.19) and, if
+  // it is an object, the lvalue-to-rvalue conversion (4.1)
   // is immediately applied."  We check the first part here, and
   // Sema::UpdateMarkingForLValueToRValue deals with the second part.
   // Note that we use the C++11 definition everywhere because nothing in
-  // C++03 depends on whether we get the C++03 version correct. This does not
-  // apply to references, since they are not objects.
+  // C++03 depends on whether we get the C++03 version correct. The second
+  // part does not apply to references, since they are not objects.
   const VarDecl *DefVD;
-  if (E && !isa<ParmVarDecl>(Var) && !Var->getType()->isReferenceType() &&
+  if (E && !isa<ParmVarDecl>(Var) &&
       Var->isUsableInConstantExpressions(SemaRef.Context) &&
-      Var->getAnyInitializer(DefVD) && DefVD->checkInitIsICE())
-    SemaRef.MaybeODRUseExprs.insert(E);
-  else
+      Var->getAnyInitializer(DefVD) && DefVD->checkInitIsICE()) {
+    if (!Var->getType()->isReferenceType())
+      SemaRef.MaybeODRUseExprs.insert(E);
+  } else
     MarkVarDeclODRUsed(SemaRef, Var, Loc);
 }
 
@@ -11205,7 +11384,9 @@ void Sema::DiagnoseAssignmentAsCondition(Expr *E) {
 
     IsOrAssign = Op->getOperator() == OO_PipeEqual;
     Loc = Op->getOperatorLoc();
-  } else {
+  } else if (PseudoObjectExpr *POE = dyn_cast<PseudoObjectExpr>(E))
+    return DiagnoseAssignmentAsCondition(POE->getSyntacticForm());
+  else {
     // Not an assignment.
     return;
   }
@@ -11759,6 +11940,10 @@ ExprResult Sema::CheckPlaceholderExpr(Expr *E) {
   case BuiltinType::PseudoObject:
     return checkPseudoObjectRValue(E);
 
+  case BuiltinType::BuiltinFn:
+    Diag(E->getLocStart(), diag::err_builtin_fn_use);
+    return ExprError();
+
   // Everything else should be impossible.
 #define BUILTIN_TYPE(Id, SingletonId) \
   case BuiltinType::Id:
@@ -11783,6 +11968,18 @@ ExprResult
 Sema::ActOnObjCBoolLiteral(SourceLocation OpLoc, tok::TokenKind Kind) {
   assert((Kind == tok::kw___objc_yes || Kind == tok::kw___objc_no) &&
          "Unknown Objective-C Boolean value!");
+  QualType BoolT = Context.ObjCBuiltinBoolTy;
+  if (!Context.getBOOLDecl()) {
+    LookupResult Result(*this, &Context.Idents.get("BOOL"), OpLoc,
+                        Sema::LookupOrdinaryName);
+    if (LookupName(Result, getCurScope()) && Result.isSingleResult()) {
+      NamedDecl *ND = Result.getFoundDecl();
+      if (TypedefDecl *TD = dyn_cast<TypedefDecl>(ND)) 
+        Context.setBOOLDecl(TD);
+    }
+  }
+  if (Context.getBOOLDecl())
+    BoolT = Context.getBOOLType();
   return Owned(new (Context) ObjCBoolLiteralExpr(Kind == tok::kw___objc_yes,
-                                        Context.ObjCBuiltinBoolTy, OpLoc));
+                                        BoolT, OpLoc));
 }
diff --git a/lib/Sema/SemaExprCXX.cpp b/lib/Sema/SemaExprCXX.cpp
index 27402599a401..0919bc5b6fa4 100644
--- a/lib/Sema/SemaExprCXX.cpp
+++ b/lib/Sema/SemaExprCXX.cpp
@@ -410,33 +410,13 @@ Sema::ActOnCXXTypeid(SourceLocation OpLoc, SourceLocation LParenLoc,
   return BuildCXXTypeId(TypeInfoType, OpLoc, (Expr*)TyOrExpr, RParenLoc);
 }
 
-/// Retrieve the UuidAttr associated with QT.
-static UuidAttr *GetUuidAttrOfType(QualType QT) {
-  // Optionally remove one level of pointer, reference or array indirection.
-  const Type *Ty = QT.getTypePtr();;
-  if (QT->isPointerType() || QT->isReferenceType())
-    Ty = QT->getPointeeType().getTypePtr();
-  else if (QT->isArrayType())
-    Ty = cast<ArrayType>(QT)->getElementType().getTypePtr();
-
-  // Loop all record redeclaration looking for an uuid attribute.
-  CXXRecordDecl *RD = Ty->getAsCXXRecordDecl();
-  for (CXXRecordDecl::redecl_iterator I = RD->redecls_begin(),
-       E = RD->redecls_end(); I != E; ++I) {
-    if (UuidAttr *Uuid = I->getAttr<UuidAttr>())
-      return Uuid;
-  }
-
-  return 0;
-}
-
 /// \brief Build a Microsoft __uuidof expression with a type operand.
 ExprResult Sema::BuildCXXUuidof(QualType TypeInfoType,
                                 SourceLocation TypeidLoc,
                                 TypeSourceInfo *Operand,
                                 SourceLocation RParenLoc) {
   if (!Operand->getType()->isDependentType()) {
-    if (!GetUuidAttrOfType(Operand->getType()))
+    if (!CXXUuidofExpr::GetUuidAttrOfType(Operand->getType()))
       return ExprError(Diag(TypeidLoc, diag::err_uuidof_without_guid));
   }
 
@@ -452,7 +432,7 @@ ExprResult Sema::BuildCXXUuidof(QualType TypeInfoType,
                                 Expr *E,
                                 SourceLocation RParenLoc) {
   if (!E->getType()->isDependentType()) {
-    if (!GetUuidAttrOfType(E->getType()) &&
+    if (!CXXUuidofExpr::GetUuidAttrOfType(E->getType()) &&
         !E->isNullPointerConstant(Context, Expr::NPC_ValueDependentIsNull))
       return ExprError(Diag(TypeidLoc, diag::err_uuidof_without_guid));
   }
@@ -808,21 +788,18 @@ Sema::BuildCXXTypeConstructExpr(TypeSourceInfo *TInfo,
                                 MultiExprArg exprs,
                                 SourceLocation RParenLoc) {
   QualType Ty = TInfo->getType();
-  unsigned NumExprs = exprs.size();
-  Expr **Exprs = (Expr**)exprs.get();
   SourceLocation TyBeginLoc = TInfo->getTypeLoc().getBeginLoc();
 
-  if (Ty->isDependentType() ||
-      CallExpr::hasAnyTypeDependentArguments(
-        llvm::makeArrayRef(Exprs, NumExprs))) {
-    exprs.release();
-
+  if (Ty->isDependentType() || CallExpr::hasAnyTypeDependentArguments(exprs)) {
     return Owned(CXXUnresolvedConstructExpr::Create(Context, TInfo,
                                                     LParenLoc,
-                                                    Exprs, NumExprs,
+                                                    exprs,
                                                     RParenLoc));
   }
 
+  unsigned NumExprs = exprs.size();
+  Expr **Exprs = exprs.data();
+
   bool ListInitialization = LParenLoc.isInvalid();
   assert((!ListInitialization || (NumExprs == 1 && isa<InitListExpr>(Exprs[0])))
          && "List initialization must have initializer list as expression.");
@@ -835,7 +812,6 @@ Sema::BuildCXXTypeConstructExpr(TypeSourceInfo *TInfo,
   // corresponding cast expression.
   if (NumExprs == 1 && !ListInitialization) {
     Expr *Arg = Exprs[0];
-    exprs.release();
     return BuildCXXFunctionalCastExpr(TInfo, LParenLoc, Arg, RParenLoc);
   }
 
@@ -865,7 +841,7 @@ Sema::BuildCXXTypeConstructExpr(TypeSourceInfo *TInfo,
                : InitializationKind::CreateValue(TyBeginLoc,
                                                  LParenLoc, RParenLoc);
   InitializationSequence InitSeq(*this, Entity, Kind, Exprs, NumExprs);
-  ExprResult Result = InitSeq.Perform(*this, Entity, Kind, move(exprs));
+  ExprResult Result = InitSeq.Perform(*this, Entity, Kind, exprs);
 
   if (!Result.isInvalid() && ListInitialization &&
       isa<InitListExpr>(Result.get())) {
@@ -881,7 +857,7 @@ Sema::BuildCXXTypeConstructExpr(TypeSourceInfo *TInfo,
   }
 
   // FIXME: Improve AST representation?
-  return move(Result);
+  return Result;
 }
 
 /// doesUsualArrayDeleteWantSize - Answers whether the usual
@@ -1011,9 +987,9 @@ Sema::ActOnCXXNew(SourceLocation StartLoc, bool UseGlobal,
   if (ParenListExpr *List = dyn_cast_or_null<ParenListExpr>(Initializer))
     DirectInitRange = List->getSourceRange();
 
-  return BuildCXXNew(StartLoc, UseGlobal,
+  return BuildCXXNew(SourceRange(StartLoc, D.getLocEnd()), UseGlobal,
                      PlacementLParen,
-                     move(PlacementArgs),
+                     PlacementArgs,
                      PlacementRParen,
                      TypeIdParens,
                      AllocType,
@@ -1044,7 +1020,7 @@ static bool isLegalArrayNewInitializer(CXXNewExpr::InitializationStyle Style,
 }
 
 ExprResult
-Sema::BuildCXXNew(SourceLocation StartLoc, bool UseGlobal,
+Sema::BuildCXXNew(SourceRange Range, bool UseGlobal,
                   SourceLocation PlacementLParen,
                   MultiExprArg PlacementArgs,
                   SourceLocation PlacementRParen,
@@ -1056,6 +1032,7 @@ Sema::BuildCXXNew(SourceLocation StartLoc, bool UseGlobal,
                   Expr *Initializer,
                   bool TypeMayContainAuto) {
   SourceRange TypeRange = AllocTypeInfo->getTypeLoc().getSourceRange();
+  SourceLocation StartLoc = Range.getBegin();
 
   CXXNewExpr::InitializationStyle initStyle;
   if (DirectInitRange.isValid()) {
@@ -1279,21 +1256,13 @@ Sema::BuildCXXNew(SourceLocation StartLoc, bool UseGlobal,
       }
     }
 
-    // ARC: warn about ABI issues.
-    if (getLangOpts().ObjCAutoRefCount) {
-      QualType BaseAllocType = Context.getBaseElementType(AllocType);
-      if (BaseAllocType.hasStrongOrWeakObjCLifetime())
-        Diag(StartLoc, diag::warn_err_new_delete_object_array)
-          << 0 << BaseAllocType;
-    }
-
     // Note that we do *not* convert the argument in any way.  It can
     // be signed, larger than size_t, whatever.
   }
 
   FunctionDecl *OperatorNew = 0;
   FunctionDecl *OperatorDelete = 0;
-  Expr **PlaceArgs = (Expr**)PlacementArgs.get();
+  Expr **PlaceArgs = PlacementArgs.data();
   unsigned NumPlaceArgs = PlacementArgs.size();
 
   if (!AllocType->isDependentType() &&
@@ -1432,15 +1401,14 @@ Sema::BuildCXXNew(SourceLocation StartLoc, bool UseGlobal,
     }
   }
 
-  PlacementArgs.release();
-
   return Owned(new (Context) CXXNewExpr(Context, UseGlobal, OperatorNew,
                                         OperatorDelete,
                                         UsualArrayDeleteWantsSize,
-                                        PlaceArgs, NumPlaceArgs, TypeIdParens,
+                                   llvm::makeArrayRef(PlaceArgs, NumPlaceArgs),
+                                        TypeIdParens,
                                         ArraySize, initStyle, Initializer,
                                         ResultType, AllocTypeInfo,
-                                        StartLoc, DirectInitRange));
+                                        Range, DirectInitRange));
 }
 
 /// \brief Checks that a type is suitable as the allocated type
@@ -1638,7 +1606,7 @@ bool Sema::FindAllocationFunctions(SourceLocation StartLoc, SourceRange Range,
             = dyn_cast<FunctionTemplateDecl>((*D)->getUnderlyingDecl())) {
         // Perform template argument deduction to try to match the
         // expected function type.
-        TemplateDeductionInfo Info(Context, StartLoc);
+        TemplateDeductionInfo Info(StartLoc);
         if (DeduceTemplateArguments(FnTmpl, 0, ExpectedFunctionType, Fn, Info))
           continue;
       } else
@@ -2100,7 +2068,7 @@ Sema::ActOnCXXDelete(SourceLocation StartLoc, bool UseGlobal,
                             ObjectPtrConversions.front()->getConversionType(),
                                     AA_Converting);
         if (Res.isUsable()) {
-          Ex = move(Res);
+          Ex = Res;
           Type = Ex.get()->getType();
         }
       }
@@ -2211,13 +2179,6 @@ Sema::ActOnCXXDelete(SourceLocation StartLoc, bool UseGlobal,
         }
       }
 
-    } else if (getLangOpts().ObjCAutoRefCount &&
-               PointeeElem->isObjCLifetimeType() &&
-               (PointeeElem.getObjCLifetime() == Qualifiers::OCL_Strong ||
-                PointeeElem.getObjCLifetime() == Qualifiers::OCL_Weak) &&
-               ArrayForm) {
-      Diag(StartLoc, diag::warn_err_new_delete_object_array)
-        << 1 << PointeeElem;
     }
 
     if (!OperatorDelete) {
@@ -2287,7 +2248,7 @@ ExprResult Sema::CheckConditionVariable(VarDecl *ConditionVar,
       return ExprError();
   }
 
-  return move(Condition);
+  return Condition;
 }
 
 /// CheckCXXBooleanCondition - Returns true if a conversion to bool is invalid.
@@ -2354,11 +2315,9 @@ static ExprResult BuildCXXCastArgument(Sema &S,
   default: llvm_unreachable("Unhandled cast kind!");
   case CK_ConstructorConversion: {
     CXXConstructorDecl *Constructor = cast<CXXConstructorDecl>(Method);
-    ASTOwningVector<Expr*> ConstructorArgs(S);
+    SmallVector<Expr*, 8> ConstructorArgs;
 
-    if (S.CompleteConstructorCall(Constructor,
-                                  MultiExprArg(&From, 1),
-                                  CastLoc, ConstructorArgs))
+    if (S.CompleteConstructorCall(Constructor, From, CastLoc, ConstructorArgs))
       return ExprError();
 
     S.CheckConstructorAccess(CastLoc, Constructor,
@@ -2367,7 +2326,7 @@ static ExprResult BuildCXXCastArgument(Sema &S,
     
     ExprResult Result
       = S.BuildCXXConstructExpr(CastLoc, Ty, cast<CXXConstructorDecl>(Method),
-                                move_arg(ConstructorArgs), 
+                                ConstructorArgs, 
                                 HadMultipleCandidates, /*ZeroInit*/ false, 
                                 CXXConstructExpr::CK_Complete, SourceRange());
     if (Result.isInvalid())
@@ -2511,15 +2470,14 @@ Sema::PerformImplicitConversion(Expr *From, QualType ToType,
     // FIXME: When can ToType be a reference type?
     assert(!ToType->isReferenceType());
     if (SCS.Second == ICK_Derived_To_Base) {
-      ASTOwningVector<Expr*> ConstructorArgs(*this);
+      SmallVector<Expr*, 8> ConstructorArgs;
       if (CompleteConstructorCall(cast<CXXConstructorDecl>(SCS.CopyConstructor),
-                                  MultiExprArg(*this, &From, 1),
-                                  /*FIXME:ConstructLoc*/SourceLocation(),
+                                  From, /*FIXME:ConstructLoc*/SourceLocation(),
                                   ConstructorArgs))
         return ExprError();
       return BuildCXXConstructExpr(/*FIXME:ConstructLoc*/SourceLocation(),
                                    ToType, SCS.CopyConstructor,
-                                   move_arg(ConstructorArgs),
+                                   ConstructorArgs,
                                    /*HadMultipleCandidates*/ false,
                                    /*ZeroInit*/ false,
                                    CXXConstructExpr::CK_Complete,
@@ -2527,8 +2485,7 @@ Sema::PerformImplicitConversion(Expr *From, QualType ToType,
     }
     return BuildCXXConstructExpr(/*FIXME:ConstructLoc*/SourceLocation(),
                                  ToType, SCS.CopyConstructor,
-                                 MultiExprArg(*this, &From, 1),
-                                 /*HadMultipleCandidates*/ false,
+                                 From, /*HadMultipleCandidates*/ false,
                                  /*ZeroInit*/ false,
                                  CXXConstructExpr::CK_Complete,
                                  SourceRange());
@@ -2602,8 +2559,16 @@ Sema::PerformImplicitConversion(Expr *From, QualType ToType,
 
   case ICK_Integral_Promotion:
   case ICK_Integral_Conversion:
-    From = ImpCastExprToType(From, ToType, CK_IntegralCast, 
-                             VK_RValue, /*BasePath=*/0, CCK).take();
+    if (ToType->isBooleanType()) {
+      assert(FromType->castAs<EnumType>()->getDecl()->isFixed() &&
+             SCS.Second == ICK_Integral_Promotion &&
+             "only enums with fixed underlying type can promote to bool");
+      From = ImpCastExprToType(From, ToType, CK_IntegralToBoolean,
+                               VK_RValue, /*BasePath=*/0, CCK).take();
+    } else {
+      From = ImpCastExprToType(From, ToType, CK_IntegralCast,
+                               VK_RValue, /*BasePath=*/0, CCK).take();
+    }
     break;
 
   case ICK_Floating_Promotion:
@@ -2943,6 +2908,7 @@ static bool CheckUnaryTypeTraitTypeCompleteness(Sema &S,
   case UTT_IsEmpty:
   case UTT_IsPolymorphic:
   case UTT_IsAbstract:
+  case UTT_IsInterfaceClass:
     // Fall-through
 
   // These traits require a complete type.
@@ -3007,7 +2973,7 @@ static bool EvaluateUnaryTypeTrait(Sema &Self, UnaryTypeTrait UTT,
   case UTT_IsUnion:
     return T->isUnionType();
   case UTT_IsClass:
-    return T->isClassType() || T->isStructureType();
+    return T->isClassType() || T->isStructureType() || T->isInterfaceType();
   case UTT_IsFunction:
     return T->isFunctionType();
 
@@ -3073,6 +3039,10 @@ static bool EvaluateUnaryTypeTrait(Sema &Self, UnaryTypeTrait UTT,
     if (const CXXRecordDecl *RD = T->getAsCXXRecordDecl())
       return RD->isAbstract();
     return false;
+  case UTT_IsInterfaceClass:
+    if (const CXXRecordDecl *RD = T->getAsCXXRecordDecl())
+      return RD->isInterface();
+    return false;
   case UTT_IsFinal:
     if (const CXXRecordDecl *RD = T->getAsCXXRecordDecl())
       return RD->hasAttr<FinalAttr>();
@@ -3417,9 +3387,7 @@ static bool evaluateTypeTrait(Sema &S, TypeTrait Kind, SourceLocation KWLoc,
     if (Init.Failed())
       return false;
     
-    ExprResult Result = Init.Perform(S, To, InitKind, 
-                                     MultiExprArg(ArgExprs.data(), 
-                                                  ArgExprs.size()));
+    ExprResult Result = Init.Perform(S, To, InitKind, ArgExprs);
     if (Result.isInvalid() || SFINAE.hasErrorOccurred())
       return false;
 
@@ -3577,7 +3545,7 @@ static bool EvaluateBinaryTypeTrait(Sema &Self, BinaryTypeTrait BTT,
     if (Init.Failed())
       return false;
 
-    ExprResult Result = Init.Perform(Self, To, Kind, MultiExprArg(&FromPtr, 1));
+    ExprResult Result = Init.Perform(Self, To, Kind, FromPtr);
     return !Result.isInvalid() && !SFINAE.hasErrorOccurred();
   }
       
@@ -3774,7 +3742,7 @@ ExprResult Sema::ActOnExpressionTrait(ExpressionTrait ET,
 
   ExprResult Result = BuildExpressionTrait(ET, KWLoc, Queried, RParen);
 
-  return move(Result);
+  return Result;
 }
 
 static bool EvaluateExpressionTrait(ExpressionTrait ET, Expr *E) {
@@ -4056,14 +4024,14 @@ static bool FindConditionalOverload(Sema &Self, ExprResult &LHS, ExprResult &RHS
                                        Best->Conversions[0], Sema::AA_Converting);
       if (LHSRes.isInvalid())
         break;
-      LHS = move(LHSRes);
+      LHS = LHSRes;
 
       ExprResult RHSRes =
         Self.PerformImplicitConversion(RHS.get(), Best->BuiltinTypes.ParamTypes[1],
                                        Best->Conversions[1], Sema::AA_Converting);
       if (RHSRes.isInvalid())
         break;
-      RHS = move(RHSRes);
+      RHS = RHSRes;
       if (Best->Function)
         Self.MarkFunctionReferenced(QuestionLoc, Best->Function);
       return false;
@@ -4104,7 +4072,7 @@ static bool ConvertForConditional(Sema &Self, ExprResult &E, QualType T) {
                                                            SourceLocation());
   Expr *Arg = E.take();
   InitializationSequence InitSeq(Self, Entity, Kind, &Arg, 1);
-  ExprResult Result = InitSeq.Perform(Self, Entity, Kind, MultiExprArg(&Arg, 1));
+  ExprResult Result = InitSeq.Perform(Self, Entity, Kind, Arg);
   if (Result.isInvalid())
     return true;
 
@@ -4129,7 +4097,7 @@ QualType Sema::CXXCheckConditionalOperands(ExprResult &Cond, ExprResult &LHS,
     ExprResult CondRes = CheckCXXBooleanCondition(Cond.take());
     if (CondRes.isInvalid())
       return QualType();
-    Cond = move(CondRes);
+    Cond = CondRes;
   }
 
   // Assume r-value.
@@ -4160,6 +4128,9 @@ QualType Sema::CXXCheckConditionalOperands(ExprResult &Cond, ExprResult &LHS,
     ExprResult &NonVoid = LVoid ? RHS : LHS;
     if (NonVoid.get()->getType()->isRecordType() &&
         NonVoid.get()->isGLValue()) {
+      if (RequireNonAbstractType(QuestionLoc, NonVoid.get()->getType(),
+                             diag::err_allocation_of_abstract_type))
+        return QualType();
       InitializedEntity Entity =
           InitializedEntity::InitializeTemporary(NonVoid.get()->getType());
       NonVoid = PerformCopyInitialization(Entity, SourceLocation(), NonVoid);
@@ -4302,7 +4273,11 @@ QualType Sema::CXXCheckConditionalOperands(ExprResult &Cond, ExprResult &LHS,
   if (Context.getCanonicalType(LTy) == Context.getCanonicalType(RTy)) {
     if (LTy->isRecordType()) {
       // The operands have class type. Make a temporary copy.
+      if (RequireNonAbstractType(QuestionLoc, LTy,
+                                 diag::err_allocation_of_abstract_type))
+        return QualType();
       InitializedEntity Entity = InitializedEntity::InitializeTemporary(LTy);
+
       ExprResult LHSCopy = PerformCopyInitialization(Entity,
                                                      SourceLocation(),
                                                      LHS);
@@ -4566,14 +4541,14 @@ QualType Sema::FindCompositePointerType(SourceLocation Loc,
 
     // Convert E1 to Composite1
     ExprResult E1Result
-      = E1ToC1.Perform(*this, Entity1, Kind, MultiExprArg(*this,&E1,1));
+      = E1ToC1.Perform(*this, Entity1, Kind, E1);
     if (E1Result.isInvalid())
       return QualType();
     E1 = E1Result.takeAs<Expr>();
 
     // Convert E2 to Composite1
     ExprResult E2Result
-      = E2ToC1.Perform(*this, Entity1, Kind, MultiExprArg(*this,&E2,1));
+      = E2ToC1.Perform(*this, Entity1, Kind, E2);
     if (E2Result.isInvalid())
       return QualType();
     E2 = E2Result.takeAs<Expr>();
@@ -4591,14 +4566,14 @@ QualType Sema::FindCompositePointerType(SourceLocation Loc,
 
   // Convert E1 to Composite2
   ExprResult E1Result
-    = E1ToC2.Perform(*this, Entity2, Kind, MultiExprArg(*this, &E1, 1));
+    = E1ToC2.Perform(*this, Entity2, Kind, E1);
   if (E1Result.isInvalid())
     return QualType();
   E1 = E1Result.takeAs<Expr>();
 
   // Convert E2 to Composite2
   ExprResult E2Result
-    = E2ToC2.Perform(*this, Entity2, Kind, MultiExprArg(*this, &E2, 1));
+    = E2ToC2.Perform(*this, Entity2, Kind, E2);
   if (E2Result.isInvalid())
     return QualType();
   E2 = E2Result.takeAs<Expr>();
@@ -4839,7 +4814,8 @@ ExprResult Sema::ActOnDecltypeExpression(Expr *E) {
                                                 BO_Comma, BO->getType(),
                                                 BO->getValueKind(),
                                                 BO->getObjectKind(),
-                                                BO->getOperatorLoc()));
+                                                BO->getOperatorLoc(),
+                                                BO->isFPContractable()));
     }
   }
 
@@ -4991,7 +4967,7 @@ Sema::ActOnStartCXXMemberReference(Scope *S, Expr *Base, SourceLocation OpLoc,
   //   type C (or of pointer to a class type C), the unqualified-id is looked
   //   up in the scope of class C. [...]
   ObjectType = ParsedType::make(BaseType);
-  return move(Base);
+  return Base;
 }
 
 ExprResult Sema::DiagnoseDtorReference(SourceLocation NameLoc,
@@ -5056,7 +5032,8 @@ ExprResult Sema::BuildPseudoDestructorExpr(Expr *Base,
   if (CheckArrow(*this, ObjectType, Base, OpKind, OpLoc))
     return ExprError();
 
-  if (!ObjectType->isDependentType() && !ObjectType->isScalarType()) {
+  if (!ObjectType->isDependentType() && !ObjectType->isScalarType() &&
+      !ObjectType->isVectorType()) {
     if (getLangOpts().MicrosoftMode && ObjectType->isVoidType())
       Diag(OpLoc, diag::ext_pseudo_dtor_on_void) << Base->getSourceRange();
     else
@@ -5203,8 +5180,7 @@ ExprResult Sema::ActOnPseudoDestructorExpr(Scope *S, Expr *Base,
   } else {
     // Resolve the template-id to a type.
     TemplateIdAnnotation *TemplateId = SecondTypeName.TemplateId;
-    ASTTemplateArgsPtr TemplateArgsPtr(*this,
-                                       TemplateId->getTemplateArgs(),
+    ASTTemplateArgsPtr TemplateArgsPtr(TemplateId->getTemplateArgs(),
                                        TemplateId->NumArgs);
     TypeResult T = ActOnTemplateIdType(TemplateId->SS,
                                        TemplateId->TemplateKWLoc,
@@ -5253,8 +5229,7 @@ ExprResult Sema::ActOnPseudoDestructorExpr(Scope *S, Expr *Base,
     } else {
       // Resolve the template-id to a type.
       TemplateIdAnnotation *TemplateId = FirstTypeName.TemplateId;
-      ASTTemplateArgsPtr TemplateArgsPtr(*this,
-                                         TemplateId->getTemplateArgs(),
+      ASTTemplateArgsPtr TemplateArgsPtr(TemplateId->getTemplateArgs(),
                                          TemplateId->NumArgs);
       TypeResult T = ActOnTemplateIdType(TemplateId->SS,
                                          TemplateId->TemplateKWLoc,
@@ -5353,7 +5328,7 @@ ExprResult Sema::BuildCXXMemberCallExpr(Expr *E, NamedDecl *FoundDecl,
 
   MarkFunctionReferenced(Exp.get()->getLocStart(), Method);
   CXXMemberCallExpr *CE =
-    new (Context) CXXMemberCallExpr(Context, ME, 0, 0, ResultType, VK,
+    new (Context) CXXMemberCallExpr(Context, ME, MultiExprArg(), ResultType, VK,
                                     Exp.get()->getLocEnd());
   return CE;
 }
diff --git a/lib/Sema/SemaExprMember.cpp b/lib/Sema/SemaExprMember.cpp
index 8f445e28648d..a7fd47183a16 100644
--- a/lib/Sema/SemaExprMember.cpp
+++ b/lib/Sema/SemaExprMember.cpp
@@ -13,6 +13,7 @@
 #include "clang/Sema/SemaInternal.h"
 #include "clang/Sema/Lookup.h"
 #include "clang/Sema/Scope.h"
+#include "clang/Sema/ScopeInfo.h"
 #include "clang/AST/DeclCXX.h"
 #include "clang/AST/DeclObjC.h"
 #include "clang/AST/DeclTemplate.h"
@@ -353,7 +354,7 @@ CheckExtVectorComponent(Sema &S, QualType baseType, ExprValueKind &VK,
   // Now look up the TypeDefDecl from the vector type. Without this,
   // diagostics look bad. We want extended vector types to appear built-in.
   for (Sema::ExtVectorDeclsType::iterator 
-         I = S.ExtVectorDecls.begin(S.ExternalSource),
+         I = S.ExtVectorDecls.begin(S.getExternalSource()),
          E = S.ExtVectorDecls.end(); 
        I != E; ++I) {
     if ((*I)->getUnderlyingType() == VT)
@@ -605,7 +606,8 @@ LookupMemberExprInRecord(Sema &SemaRef, LookupResult &R,
     R.addDecl(ND);
     SemaRef.Diag(R.getNameLoc(), diag::err_no_member_suggest)
       << Name << DC << CorrectedQuotedStr << SS.getRange()
-      << FixItHint::CreateReplacement(R.getNameLoc(), CorrectedStr);
+      << FixItHint::CreateReplacement(Corrected.getCorrectionRange(),
+                                      CorrectedStr);
     SemaRef.Diag(ND->getLocation(), diag::note_previous_decl)
       << ND->getDeclName();
   }
@@ -656,7 +658,7 @@ Sema::BuildMemberReferenceExpr(Expr *Base, QualType BaseType,
     }
 
     if (Result.get())
-      return move(Result);
+      return Result;
 
     // LookupMemberExpr can modify Base, and thus change BaseType
     BaseType = Base->getType();
@@ -1021,7 +1023,7 @@ static bool ShouldTryAgainWithRedefinitionType(Sema &S, ExprResult &base) {
   // Do the substitution as long as the redefinition type isn't just a
   // possibly-qualified pointer to builtin-id or builtin-Class again.
   opty = redef->getAs<ObjCObjectPointerType>();
-  if (opty && !opty->getObjectType()->getInterface() != 0)
+  if (opty && !opty->getObjectType()->getInterface())
     return false;
 
   base = S.ImpCastExprToType(base.take(), redef, CK_BitCast);
@@ -1272,9 +1274,23 @@ Sema::LookupMemberExpr(LookupResult &R, ExprResult &BaseExpr,
       if (warn)
         Diag(MemberLoc, diag::warn_direct_ivar_access) << IV->getDeclName();
     }
-    return Owned(new (Context) ObjCIvarRefExpr(IV, IV->getType(),
-                                               MemberLoc, BaseExpr.take(),
-                                               IsArrow));
+
+    ObjCIvarRefExpr *Result = new (Context) ObjCIvarRefExpr(IV, IV->getType(),
+                                                            MemberLoc,
+                                                            BaseExpr.take(),
+                                                            IsArrow);
+
+    if (getLangOpts().ObjCAutoRefCount) {
+      if (IV->getType().getObjCLifetime() == Qualifiers::OCL_Weak) {
+        DiagnosticsEngine::Level Level =
+          Diags.getDiagnosticLevel(diag::warn_arc_repeated_use_of_weak,
+                                   MemberLoc);
+        if (Level != DiagnosticsEngine::Ignored)
+          getCurFunction()->recordUseOfWeak(Result);
+      }
+    }
+
+    return Owned(Result);
   }
 
   // Objective-C property access.
@@ -1550,7 +1566,7 @@ ExprResult Sema::ActOnMemberAccessExpr(Scope *S, Expr *Base,
           Id.getKind() == UnqualifiedId::IK_DestructorName)
         return DiagnoseDtorReference(NameInfo.getLoc(), Result.get());
 
-      return move(Result);
+      return Result;
     }
 
     ActOnMemberAccessExtraArgs ExtraArgs = {S, Id, ObjCImpDecl, HasTrailingLParen};
@@ -1560,7 +1576,7 @@ ExprResult Sema::ActOnMemberAccessExpr(Scope *S, Expr *Base,
                                       false, &ExtraArgs);
   }
 
-  return move(Result);
+  return Result;
 }
 
 static ExprResult
diff --git a/lib/Sema/SemaExprObjC.cpp b/lib/Sema/SemaExprObjC.cpp
index 0aabf8b634d1..e43b6bff5586 100644
--- a/lib/Sema/SemaExprObjC.cpp
+++ b/lib/Sema/SemaExprObjC.cpp
@@ -229,7 +229,7 @@ static ObjCMethodDecl *getNSNumberFactoryMethod(Sema &S, SourceLocation Loc,
                                     S.NSNumberPointer, ResultTInfo,
                                     S.NSNumberDecl,
                                     /*isInstance=*/false, /*isVariadic=*/false,
-                                    /*isSynthesized=*/false,
+                                    /*isPropertyAccessor=*/false,
                                     /*isImplicitlyDeclared=*/true,
                                     /*isDefined=*/false,
                                     ObjCMethodDecl::Required,
@@ -345,7 +345,7 @@ static ExprResult CheckObjCCollectionLiteralElement(Sema &S, Expr *Element,
                                        SourceLocation());
     InitializationSequence Seq(S, Entity, Kind, &Element, 1);
     if (!Seq.Failed())
-      return Seq.Perform(S, Entity, Kind, MultiExprArg(S, &Element, 1));
+      return Seq.Perform(S, Entity, Kind, Element);
   }
 
   Expr *OrigElement = Element;
@@ -477,7 +477,7 @@ ExprResult Sema::BuildObjCBoxedExpr(SourceRange SR, Expr *ValueExpr) {
                                    stringWithUTF8String, NSStringPointer,
                                    ResultTInfo, NSStringDecl,
                                    /*isInstance=*/false, /*isVariadic=*/false,
-                                   /*isSynthesized=*/false,
+                                   /*isPropertyAccessor=*/false,
                                    /*isImplicitlyDeclared=*/true,
                                    /*isDefined=*/false,
                                    ObjCMethodDecl::Required,
@@ -646,7 +646,7 @@ ExprResult Sema::BuildObjCArrayLiteral(SourceRange SR, MultiExprArg Elements) {
                            ResultTInfo,
                            Context.getTranslationUnitDecl(),
                            false /*Instance*/, false/*isVariadic*/,
-                           /*isSynthesized=*/false,
+                           /*isPropertyAccessor=*/false,
                            /*isImplicitlyDeclared=*/true, /*isDefined=*/false,
                            ObjCMethodDecl::Required,
                            false);
@@ -708,7 +708,7 @@ ExprResult Sema::BuildObjCArrayLiteral(SourceRange SR, MultiExprArg Elements) {
 
   // Check that each of the elements provided is valid in a collection literal,
   // performing conversions as necessary.
-  Expr **ElementsBuffer = Elements.get();
+  Expr **ElementsBuffer = Elements.data();
   for (unsigned I = 0, N = Elements.size(); I != N; ++I) {
     ExprResult Converted = CheckObjCCollectionLiteralElement(*this,
                                                              ElementsBuffer[I],
@@ -724,10 +724,8 @@ ExprResult Sema::BuildObjCArrayLiteral(SourceRange SR, MultiExprArg Elements) {
                                     Context.getObjCInterfaceType(NSArrayDecl));
 
   return MaybeBindToTemporary(
-           ObjCArrayLiteral::Create(Context, 
-                                    llvm::makeArrayRef(Elements.get(), 
-                                                       Elements.size()), 
-                                    Ty, ArrayWithObjectsMethod, SR));
+           ObjCArrayLiteral::Create(Context, Elements, Ty,
+                                    ArrayWithObjectsMethod, SR));
 }
 
 ExprResult Sema::BuildObjCDictionaryLiteral(SourceRange SR, 
@@ -766,7 +764,7 @@ ExprResult Sema::BuildObjCDictionaryLiteral(SourceRange SR,
                            0 /*TypeSourceInfo */,
                            Context.getTranslationUnitDecl(),
                            false /*Instance*/, false/*isVariadic*/,
-                           /*isSynthesized=*/false,
+                           /*isPropertyAccessor=*/false,
                            /*isImplicitlyDeclared=*/true, /*isDefined=*/false,
                            ObjCMethodDecl::Required,
                            false);
@@ -1125,7 +1123,9 @@ void Sema::EmitRelatedResultTypeNote(const Expr *E) {
 
 bool Sema::CheckMessageArgumentTypes(QualType ReceiverType,
                                      Expr **Args, unsigned NumArgs,
-                                     Selector Sel, ObjCMethodDecl *Method,
+                                     Selector Sel, 
+                                     ArrayRef<SourceLocation> SelectorLocs,
+                                     ObjCMethodDecl *Method,
                                      bool isClassMessage, bool isSuperMessage,
                                      SourceLocation lbrac, SourceLocation rbrac,
                                      QualType &ReturnType, ExprValueKind &VK) {
@@ -1149,7 +1149,8 @@ bool Sema::CheckMessageArgumentTypes(QualType ReceiverType,
                               : diag::warn_inst_method_not_found;
     if (!getLangOpts().DebuggerSupport)
       Diag(lbrac, DiagID)
-        << Sel << isClassMessage << SourceRange(lbrac, rbrac);
+        << Sel << isClassMessage << SourceRange(SelectorLocs.front(), 
+                                                SelectorLocs.back());
 
     // In debuggers, we want to use __unknown_anytype for these
     // results so that clients can cast them.
@@ -1304,8 +1305,8 @@ static void DiagnoseARCUseOfWeakReceiver(Sema &S, Expr *Receiver) {
   Expr *RExpr = Receiver->IgnoreParenImpCasts();
   SourceLocation Loc = RExpr->getLocStart();
   QualType T = RExpr->getType();
-  ObjCPropertyDecl *PDecl = 0;
-  ObjCMethodDecl *GDecl = 0;
+  const ObjCPropertyDecl *PDecl = 0;
+  const ObjCMethodDecl *GDecl = 0;
   if (PseudoObjectExpr *POE = dyn_cast<PseudoObjectExpr>(RExpr)) {
     RExpr = POE->getSyntacticForm();
     if (ObjCPropertyRefExpr *PRE = dyn_cast<ObjCPropertyRefExpr>(RExpr)) {
@@ -1327,34 +1328,29 @@ static void DiagnoseARCUseOfWeakReceiver(Sema &S, Expr *Receiver) {
     // See if receiver is a method which envokes a synthesized getter
     // backing a 'weak' property.
     ObjCMethodDecl *Method = ME->getMethodDecl();
-    if (Method && Method->isSynthesized()) {
-      Selector Sel = Method->getSelector();
-      if (Sel.getNumArgs() == 0) {
-        const DeclContext *Container = Method->getDeclContext();
-        PDecl = 
-          S.LookupPropertyDecl(cast<ObjCContainerDecl>(Container),
-                               Sel.getIdentifierInfoForSlot(0));
-      }
+    if (Method && Method->getSelector().getNumArgs() == 0) {
+      PDecl = Method->findPropertyDecl();
       if (PDecl)
         T = PDecl->getType();
     }
   }
   
-  if (T.getObjCLifetime() == Qualifiers::OCL_Weak) {
-    S.Diag(Loc, diag::warn_receiver_is_weak) 
-      << ((!PDecl && !GDecl) ? 0 : (PDecl ? 1 : 2));
-    if (PDecl)
-      S.Diag(PDecl->getLocation(), diag::note_property_declare);
-    else if (GDecl)
-      S.Diag(GDecl->getLocation(), diag::note_method_declared_at) << GDecl;
-    return;
+  if (T.getObjCLifetime() != Qualifiers::OCL_Weak) {
+    if (!PDecl)
+      return;
+    if (!(PDecl->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_weak))
+      return;
   }
-  
-  if (PDecl && 
-      (PDecl->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_weak)) {
-    S.Diag(Loc, diag::warn_receiver_is_weak) << 1;
+
+  S.Diag(Loc, diag::warn_receiver_is_weak)
+    << ((!PDecl && !GDecl) ? 0 : (PDecl ? 1 : 2));
+
+  if (PDecl)
     S.Diag(PDecl->getLocation(), diag::note_property_declare);
-  }
+  else if (GDecl)
+    S.Diag(GDecl->getLocation(), diag::note_method_declared_at) << GDecl;
+
+  S.Diag(Loc, diag::note_arc_assign_to_strong);
 }
 
 /// HandleExprPropertyRefExpr - Handle foo.bar where foo is a pointer to an
@@ -1776,19 +1772,17 @@ ExprResult Sema::ActOnSuperMessage(Scope *S,
 
   // We are in a method whose class has a superclass, so 'super'
   // is acting as a keyword.
-  if (Method->isInstanceMethod()) {
-    if (Sel.getMethodFamily() == OMF_dealloc)
-      getCurFunction()->ObjCShouldCallSuperDealloc = false;
-    if (Sel.getMethodFamily() == OMF_finalize)
-      getCurFunction()->ObjCShouldCallSuperFinalize = false;
+  if (Method->getSelector() == Sel)
+    getCurFunction()->ObjCShouldCallSuper = false;
 
+  if (Method->isInstanceMethod()) {
     // Since we are in an instance method, this is an instance
     // message to the superclass instance.
     QualType SuperTy = Context.getObjCInterfaceType(Super);
     SuperTy = Context.getObjCObjectPointerType(SuperTy);
     return BuildInstanceMessage(0, SuperTy, SuperLoc,
                                 Sel, /*Method=*/0,
-                                LBracLoc, SelectorLocs, RBracLoc, move(Args));
+                                LBracLoc, SelectorLocs, RBracLoc, Args);
   }
   
   // Since we are in a class method, this is a class message to
@@ -1796,7 +1790,7 @@ ExprResult Sema::ActOnSuperMessage(Scope *S,
   return BuildClassMessage(/*ReceiverTypeInfo=*/0,
                            Context.getObjCInterfaceType(Super),
                            SuperLoc, Sel, /*Method=*/0,
-                           LBracLoc, SelectorLocs, RBracLoc, move(Args));
+                           LBracLoc, SelectorLocs, RBracLoc, Args);
 }
 
 
@@ -1911,7 +1905,7 @@ ExprResult Sema::BuildClassMessage(TypeSourceInfo *ReceiverTypeInfo,
     // If the receiver type is dependent, we can't type-check anything
     // at this point. Build a dependent expression.
     unsigned NumArgs = ArgsIn.size();
-    Expr **Args = reinterpret_cast<Expr **>(ArgsIn.release());
+    Expr **Args = ArgsIn.data();
     assert(SuperLoc.isInvalid() && "Message to super with dependent type");
     return Owned(ObjCMessageExpr::Create(Context, ReceiverType,
                                          VK_RValue, LBracLoc, ReceiverTypeInfo,
@@ -1965,8 +1959,9 @@ ExprResult Sema::BuildClassMessage(TypeSourceInfo *ReceiverTypeInfo,
   ExprValueKind VK = VK_RValue;
 
   unsigned NumArgs = ArgsIn.size();
-  Expr **Args = reinterpret_cast<Expr **>(ArgsIn.release());
-  if (CheckMessageArgumentTypes(ReceiverType, Args, NumArgs, Sel, Method, true,
+  Expr **Args = ArgsIn.data();
+  if (CheckMessageArgumentTypes(ReceiverType, Args, NumArgs, Sel, SelectorLocs,
+                                Method, true,
                                 SuperLoc.isValid(), LBracLoc, RBracLoc, 
                                 ReturnType, VK))
     return ExprError();
@@ -2016,7 +2011,7 @@ ExprResult Sema::ActOnClassMessage(Scope *S,
 
   return BuildClassMessage(ReceiverTypeInfo, ReceiverType, 
                            /*SuperLoc=*/SourceLocation(), Sel, /*Method=*/0,
-                           LBracLoc, SelectorLocs, RBracLoc, move(Args));
+                           LBracLoc, SelectorLocs, RBracLoc, Args);
 }
 
 ExprResult Sema::BuildInstanceMessageImplicit(Expr *Receiver,
@@ -2095,7 +2090,7 @@ ExprResult Sema::BuildInstanceMessage(Expr *Receiver,
       // If the receiver is type-dependent, we can't type-check anything
       // at this point. Build a dependent expression.
       unsigned NumArgs = ArgsIn.size();
-      Expr **Args = reinterpret_cast<Expr **>(ArgsIn.release());
+      Expr **Args = ArgsIn.data();
       assert(SuperLoc.isInvalid() && "Message to super with dependent type");
       return Owned(ObjCMessageExpr::Create(Context, Context.DependentTy,
                                            VK_RValue, LBracLoc, Receiver, Sel, 
@@ -2282,7 +2277,7 @@ ExprResult Sema::BuildInstanceMessage(Expr *Receiver,
                                       LBracLoc,
                                       SelectorLocs,
                                       RBracLoc,
-                                      move(ArgsIn));
+                                      ArgsIn);
         } else {
           // Reject other random receiver types (e.g. structs).
           Diag(Loc, diag::err_bad_receiver_type)
@@ -2295,12 +2290,13 @@ ExprResult Sema::BuildInstanceMessage(Expr *Receiver,
 
   // Check the message arguments.
   unsigned NumArgs = ArgsIn.size();
-  Expr **Args = reinterpret_cast<Expr **>(ArgsIn.release());
+  Expr **Args = ArgsIn.data();
   QualType ReturnType;
   ExprValueKind VK = VK_RValue;
   bool ClassMessage = (ReceiverType->isObjCClassType() ||
                        ReceiverType->isObjCQualifiedClassType());
-  if (CheckMessageArgumentTypes(ReceiverType, Args, NumArgs, Sel, Method, 
+  if (CheckMessageArgumentTypes(ReceiverType, Args, NumArgs, Sel,
+                                SelectorLocs, Method, 
                                 ClassMessage, SuperLoc.isValid(), 
                                 LBracLoc, RBracLoc, ReturnType, VK))
     return ExprError();
@@ -2428,6 +2424,24 @@ ExprResult Sema::BuildInstanceMessage(Expr *Receiver,
     // In ARC, check for message sends which are likely to introduce
     // retain cycles.
     checkRetainCycles(Result);
+
+    if (!isImplicit && Method) {
+      if (const ObjCPropertyDecl *Prop = Method->findPropertyDecl()) {
+        bool IsWeak =
+          Prop->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_weak;
+        if (!IsWeak && Sel.isUnarySelector())
+          IsWeak = ReturnType.getObjCLifetime() & Qualifiers::OCL_Weak;
+
+        if (IsWeak) {
+          DiagnosticsEngine::Level Level =
+            Diags.getDiagnosticLevel(diag::warn_arc_repeated_use_of_weak,
+                                     LBracLoc);
+          if (Level != DiagnosticsEngine::Ignored)
+            getCurFunction()->recordUseOfWeak(Result, Prop);
+
+        }
+      }
+    }
   }
       
   return MaybeBindToTemporary(Result);
@@ -2448,7 +2462,7 @@ ExprResult Sema::ActOnInstanceMessage(Scope *S,
 
   return BuildInstanceMessage(Receiver, Receiver->getType(),
                               /*SuperLoc=*/SourceLocation(), Sel, /*Method=*/0, 
-                              LBracLoc, SelectorLocs, RBracLoc, move(Args));
+                              LBracLoc, SelectorLocs, RBracLoc, Args);
 }
 
 enum ARCConversionTypeClass {
@@ -3079,8 +3093,8 @@ Expr *Sema::stripARCUnbridgedCast(Expr *e) {
 
     return new (Context) GenericSelectionExpr(Context, gse->getGenericLoc(),
                                               gse->getControllingExpr(),
-                                              subTypes.data(), subExprs.data(),
-                                              n, gse->getDefaultLoc(),
+                                              subTypes, subExprs,
+                                              gse->getDefaultLoc(),
                                               gse->getRParenLoc(),
                                        gse->containsUnexpandedParameterPack(),
                                               gse->getResultIndex());
@@ -3101,8 +3115,8 @@ bool Sema::CheckObjCARCUnavailableWeakConversion(QualType castType,
       canExprType->isObjCObjectPointerType()) {
     if (const ObjCObjectPointerType *ObjT =
         canExprType->getAs<ObjCObjectPointerType>())
-      if (ObjT->getInterfaceDecl()->isArcWeakrefUnavailable())
-        return false;
+      if (const ObjCInterfaceDecl *ObjI = ObjT->getInterfaceDecl())
+        return !ObjI->isArcWeakrefUnavailable();
   }
   return true;
 }
diff --git a/lib/Sema/SemaInit.cpp b/lib/Sema/SemaInit.cpp
index 62ab1e645089..3596bbfc725a 100644
--- a/lib/Sema/SemaInit.cpp
+++ b/lib/Sema/SemaInit.cpp
@@ -1316,6 +1316,8 @@ void InitListChecker::CheckStructUnionTypes(const InitializedEntity &Entity,
   // If the record is invalid, some of it's members are invalid. To avoid
   // confusion, we forgo checking the intializer for the entire record.
   if (structDecl->isInvalidDecl()) {
+    // Assume it was supposed to consume a single initializer.
+    ++Index;
     hadError = true;
     return;
   }
@@ -1503,11 +1505,14 @@ static void ExpandAnonymousFieldDesignator(Sema &SemaRef,
 ///  corresponds to FieldName.
 static IndirectFieldDecl *FindIndirectFieldDesignator(FieldDecl *AnonField,
                                                  IdentifierInfo *FieldName) {
+  if (!FieldName)
+    return 0;
+
   assert(AnonField->isAnonymousStructOrUnion());
   Decl *NextDecl = AnonField->getNextDeclInContext();
   while (IndirectFieldDecl *IF = 
           dyn_cast_or_null<IndirectFieldDecl>(NextDecl)) {
-    if (FieldName && FieldName == IF->getAnonField()->getIdentifier())
+    if (FieldName == IF->getAnonField()->getIdentifier())
       return IF;
     NextDecl = NextDecl->getNextDeclInContext();
   }
@@ -1521,8 +1526,8 @@ static DesignatedInitExpr *CloneDesignatedInitExpr(Sema &SemaRef,
   for (unsigned I = 0; I < NumIndexExprs; ++I)
     IndexExprs[I] = DIE->getSubExpr(I + 1);
   return DesignatedInitExpr::Create(SemaRef.Context, DIE->designators_begin(),
-                                    DIE->size(), IndexExprs.data(),
-                                    NumIndexExprs, DIE->getEqualOrColonLoc(),
+                                    DIE->size(), IndexExprs,
+                                    DIE->getEqualOrColonLoc(),
                                     DIE->usesGNUSyntax(), DIE->getInit());
 }
 
@@ -1562,7 +1567,7 @@ class FieldInitializerValidatorCCC : public CorrectionCandidateCallback {
 ///
 /// @param DesigIdx  The index of the current designator.
 ///
-/// @param DeclType  The type of the "current object" (C99 6.7.8p17),
+/// @param CurrentObjectType The type of the "current object" (C99 6.7.8p17),
 /// into which the designation in @p DIE should refer.
 ///
 /// @param NextField  If non-NULL and the first designator in @p DIE is
@@ -2068,7 +2073,7 @@ InitListChecker::getStructuredSubobjectInit(InitListExpr *IList, unsigned Index,
 
   InitListExpr *Result
     = new (SemaRef.Context) InitListExpr(SemaRef.Context,
-                                         InitRange.getBegin(), 0, 0,
+                                         InitRange.getBegin(), MultiExprArg(),
                                          InitRange.getEnd());
 
   QualType ResultType = CurrentObjectType;
@@ -2261,8 +2266,8 @@ ExprResult Sema::ActOnDesignatedInitializer(Designation &Desig,
   DesignatedInitExpr *DIE
     = DesignatedInitExpr::Create(Context,
                                  Designators.data(), Designators.size(),
-                                 InitExpressions.data(), InitExpressions.size(),
-                                 Loc, GNUSyntax, Init.takeAs<Expr>());
+                                 InitExpressions, Loc, GNUSyntax,
+                                 Init.takeAs<Expr>());
 
   if (!getLangOpts().C99)
     Diag(DIE->getLocStart(), diag::ext_designated_init)
@@ -2814,14 +2819,6 @@ static void TryConstructorInitialization(Sema &S,
   assert((!InitListSyntax || (NumArgs == 1 && isa<InitListExpr>(Args[0]))) &&
          "InitListSyntax must come with a single initializer list argument.");
 
-  // Check constructor arguments for self reference.
-  if (DeclaratorDecl *DD = Entity.getDecl())
-    // Parameters arguments are occassionially constructed with itself,
-    // for instance, in recursive functions.  Skip them.
-    if (!isa<ParmVarDecl>(DD))
-      for (unsigned i = 0; i < NumArgs; ++i)
-        S.CheckSelfReference(DD, Args[i]);
-
   // The type we're constructing needs to be complete.
   if (S.RequireCompleteType(Kind.getLocation(), DestType, 0)) {
     Sequence.setIncompleteTypeFailure(DestType);
@@ -3614,8 +3611,8 @@ static void TryValueInitialization(Sema &S,
       //    user-provided or deleted default constructor, then the object is
       //    zero-initialized and, if T has a non-trivial default constructor,
       //    default-initialized;
-      // FIXME: The 'non-union' here is a defect (not yet assigned an issue
-      // number). Update the quotation when the defect is resolved.
+      // The 'non-union' here was removed by DR1502. The 'non-trivial default
+      // constructor' part was removed by DR1507.
       if (NeedZeroInitialization)
         Sequence.AddZeroInitializationStep(Entity.getType());
 
@@ -3703,8 +3700,14 @@ static void TryUserDefinedConversion(Sema &S,
 
     // Try to complete the type we're converting to.
     if (!S.RequireCompleteType(Kind.getLocation(), DestType, 0)) {
-      DeclContext::lookup_iterator Con, ConEnd;
-      for (llvm::tie(Con, ConEnd) = S.LookupConstructors(DestRecordDecl);
+      DeclContext::lookup_iterator ConOrig, ConEndOrig;
+      llvm::tie(ConOrig, ConEndOrig) = S.LookupConstructors(DestRecordDecl);
+      // The container holding the constructors can under certain conditions
+      // be changed while iterating. To be safe we copy the lookup results
+      // to a new container.
+      SmallVector<NamedDecl*, 8> CopyOfCon(ConOrig, ConEndOrig);
+      for (SmallVector<NamedDecl*, 8>::iterator
+             Con = CopyOfCon.begin(), ConEnd = CopyOfCon.end();
            Con != ConEnd; ++Con) {
         NamedDecl *D = *Con;
         DeclAccessPair FoundDecl = DeclAccessPair::make(D, D->getAccess());
@@ -4413,7 +4416,7 @@ static ExprResult CopyObject(Sema &S,
   if (const RecordType *Record = T->getAs<RecordType>())
     Class = cast<CXXRecordDecl>(Record->getDecl());
   if (!Class)
-    return move(CurInit);
+    return CurInit;
 
   // C++0x [class.copy]p32:
   //   When certain criteria are met, an implementation is allowed to
@@ -4435,7 +4438,7 @@ static ExprResult CopyObject(Sema &S,
 
   // Make sure that the type we are copying is complete.
   if (S.RequireCompleteType(Loc, T, diag::err_temp_copy_incomplete))
-    return move(CurInit);
+    return CurInit;
 
   // Perform overload resolution using the class's copy/move constructors.
   // Only consider constructors and constructor templates. Per
@@ -4460,7 +4463,7 @@ static ExprResult CopyObject(Sema &S,
     CandidateSet.NoteCandidates(S, OCD_AllCandidates, CurInitExpr);
     if (!IsExtraneousCopy || S.isSFINAEContext())
       return ExprError();
-    return move(CurInit);
+    return CurInit;
 
   case OR_Ambiguous:
     S.Diag(Loc, diag::err_temp_copy_ambiguous)
@@ -4478,7 +4481,7 @@ static ExprResult CopyObject(Sema &S,
   }
 
   CXXConstructorDecl *Constructor = cast<CXXConstructorDecl>(Best->Function);
-  ASTOwningVector<Expr*> ConstructorArgs(S);
+  SmallVector<Expr*, 8> ConstructorArgs;
   CurInit.release(); // Ownership transferred into MultiExprArg, below.
 
   S.CheckConstructorAccess(Loc, Constructor, Entity,
@@ -4521,7 +4524,7 @@ static ExprResult CopyObject(Sema &S,
 
   // Actually perform the constructor call.
   CurInit = S.BuildCXXConstructExpr(Loc, T, Constructor, Elidable,
-                                    move_arg(ConstructorArgs),
+                                    ConstructorArgs,
                                     HadMultipleCandidates,
                                     /*ZeroInit*/ false,
                                     CXXConstructExpr::CK_Complete,
@@ -4530,7 +4533,7 @@ static ExprResult CopyObject(Sema &S,
   // If we're supposed to bind temporaries, do so.
   if (!CurInit.isInvalid() && shouldBindAsTemporary(Entity))
     CurInit = S.MaybeBindToTemporary(CurInit.takeAs<Expr>());
-  return move(CurInit);
+  return CurInit;
 }
 
 /// \brief Check whether elidable copy construction for binding a reference to
@@ -4619,7 +4622,7 @@ PerformConstructorInitialization(Sema &S,
   bool HadMultipleCandidates = Step.Function.HadMultipleCandidates;
 
   // Build a call to the selected constructor.
-  ASTOwningVector<Expr*> ConstructorArgs(S);
+  SmallVector<Expr*, 8> ConstructorArgs;
   SourceLocation Loc = (Kind.isCopyInit() && Kind.getEqualLoc().isValid())
                          ? Kind.getEqualLoc()
                          : Kind.getLocation();
@@ -4648,7 +4651,7 @@ PerformConstructorInitialization(Sema &S,
 
   // Determine the arguments required to actually perform the constructor
   // call.
-  if (S.CompleteConstructorCall(Constructor, move(Args),
+  if (S.CompleteConstructorCall(Constructor, Args,
                                 Loc, ConstructorArgs,
                                 AllowExplicitConv))
     return ExprError();
@@ -4660,8 +4663,6 @@ PerformConstructorInitialization(Sema &S,
         (Kind.getKind() == InitializationKind::IK_Direct ||
          Kind.getKind() == InitializationKind::IK_Value)))) {
     // An explicitly-constructed temporary, e.g., X(1, 2).
-    unsigned NumExprs = ConstructorArgs.size();
-    Expr **Exprs = (Expr **)ConstructorArgs.take();
     S.MarkFunctionReferenced(Loc, Constructor);
     S.DiagnoseUseOfDecl(Constructor, Loc);
 
@@ -4675,8 +4676,7 @@ PerformConstructorInitialization(Sema &S,
     CurInit = S.Owned(new (S.Context) CXXTemporaryObjectExpr(S.Context,
                                                              Constructor,
                                                              TSInfo,
-                                                             Exprs,
-                                                             NumExprs,
+                                                             ConstructorArgs,
                                                              ParenRange,
                                                      HadMultipleCandidates,
                                          ConstructorInitRequiresZeroInit));
@@ -4702,7 +4702,7 @@ PerformConstructorInitialization(Sema &S,
     if (Entity.allowsNRVO())
       CurInit = S.BuildCXXConstructExpr(Loc, Entity.getType(),
                                         Constructor, /*Elidable=*/true,
-                                        move_arg(ConstructorArgs),
+                                        ConstructorArgs,
                                         HadMultipleCandidates,
                                         ConstructorInitRequiresZeroInit,
                                         ConstructKind,
@@ -4710,7 +4710,7 @@ PerformConstructorInitialization(Sema &S,
     else
       CurInit = S.BuildCXXConstructExpr(Loc, Entity.getType(),
                                         Constructor,
-                                        move_arg(ConstructorArgs),
+                                        ConstructorArgs,
                                         HadMultipleCandidates,
                                         ConstructorInitRequiresZeroInit,
                                         ConstructKind,
@@ -4727,7 +4727,7 @@ PerformConstructorInitialization(Sema &S,
   if (shouldBindAsTemporary(Entity))
     CurInit = S.MaybeBindToTemporary(CurInit.takeAs<Expr>());
 
-  return move(CurInit);
+  return CurInit;
 }
 
 /// Determine whether the specified InitializedEntity definitely has a lifetime
@@ -4775,7 +4775,7 @@ InitializationSequence::Perform(Sema &S,
                                 QualType *ResultType) {
   if (Failed()) {
     unsigned NumArgs = Args.size();
-    Diagnose(S, Entity, Kind, (Expr **)Args.release(), NumArgs);
+    Diagnose(S, Entity, Kind, Args.data(), NumArgs);
     return ExprError();
   }
 
@@ -4795,7 +4795,7 @@ InitializationSequence::Perform(Sema &S,
         // introduced and such).  So, we fall back to making the array
         // type a dependently-sized array type with no specified
         // bound.
-        if (isa<InitListExpr>((Expr *)Args.get()[0])) {
+        if (isa<InitListExpr>((Expr *)Args[0])) {
           SourceRange Brackets;
 
           // Scavange the location of the brackets from the entity, if we can.
@@ -4823,12 +4823,12 @@ InitializationSequence::Perform(Sema &S,
       // Rebuild the ParenListExpr.
       SourceRange ParenRange = Kind.getParenRange();
       return S.ActOnParenListExpr(ParenRange.getBegin(), ParenRange.getEnd(),
-                                  move(Args));
+                                  Args);
     }
     assert(Kind.getKind() == InitializationKind::IK_Copy ||
            Kind.isExplicitCast() || 
            Kind.getKind() == InitializationKind::IK_DirectList);
-    return ExprResult(Args.release()[0]);
+    return ExprResult(Args[0]);
   }
 
   // No steps means no initialization.
@@ -4836,22 +4836,22 @@ InitializationSequence::Perform(Sema &S,
     return S.Owned((Expr *)0);
 
   if (S.getLangOpts().CPlusPlus0x && Entity.getType()->isReferenceType() &&
-      Args.size() == 1 && isa<InitListExpr>(Args.get()[0]) &&
+      Args.size() == 1 && isa<InitListExpr>(Args[0]) &&
       Entity.getKind() != InitializedEntity::EK_Parameter) {
     // Produce a C++98 compatibility warning if we are initializing a reference
     // from an initializer list. For parameters, we produce a better warning
     // elsewhere.
-    Expr *Init = Args.get()[0];
+    Expr *Init = Args[0];
     S.Diag(Init->getLocStart(), diag::warn_cxx98_compat_reference_list_init)
       << Init->getSourceRange();
   }
 
   // Diagnose cases where we initialize a pointer to an array temporary, and the
   // pointer obviously outlives the temporary.
-  if (Args.size() == 1 && Args.get()[0]->getType()->isArrayType() &&
+  if (Args.size() == 1 && Args[0]->getType()->isArrayType() &&
       Entity.getType()->isPointerType() &&
       InitializedEntityOutlivesFullExpression(Entity)) {
-    Expr *Init = Args.get()[0];
+    Expr *Init = Args[0];
     Expr::LValueClassification Kind = Init->ClassifyLValue(S.Context);
     if (Kind == Expr::LV_ClassTemporary || Kind == Expr::LV_ArrayTemporary)
       S.Diag(Init->getLocStart(), diag::warn_temporary_array_to_pointer_decay)
@@ -4897,7 +4897,7 @@ InitializationSequence::Perform(Sema &S,
   case SK_ProduceObjCObject:
   case SK_StdInitializerList: {
     assert(Args.size() == 1);
-    CurInit = Args.get()[0];
+    CurInit = Args[0];
     if (!CurInit.get()) return ExprError();
     break;
   }
@@ -4924,7 +4924,7 @@ InitializationSequence::Perform(Sema &S,
       // initializer to reflect that choice.
       S.CheckAddressOfMemberAccess(CurInit.get(), Step->Function.FoundDecl);
       S.DiagnoseUseOfDecl(Step->Function.FoundDecl, Kind.getLocation());
-      CurInit = S.FixOverloadedFunctionReference(move(CurInit),
+      CurInit = S.FixOverloadedFunctionReference(CurInit,
                                                  Step->Function.FoundDecl,
                                                  Step->Function.Function);
       break;
@@ -5016,7 +5016,7 @@ InitializationSequence::Perform(Sema &S,
       break;
 
     case SK_ExtraneousCopyToTemporary:
-      CurInit = CopyObject(S, Step->Type, Entity, move(CurInit),
+      CurInit = CopyObject(S, Step->Type, Entity, CurInit,
                            /*IsExtraneousCopy=*/true);
       break;
 
@@ -5031,7 +5031,7 @@ InitializationSequence::Perform(Sema &S,
       bool CreatedObject = false;
       if (CXXConstructorDecl *Constructor = dyn_cast<CXXConstructorDecl>(Fn)) {
         // Build a call to the selected constructor.
-        ASTOwningVector<Expr*> ConstructorArgs(S);
+        SmallVector<Expr*, 8> ConstructorArgs;
         SourceLocation Loc = CurInit.get()->getLocStart();
         CurInit.release(); // Ownership transferred into MultiExprArg, below.
 
@@ -5045,7 +5045,7 @@ InitializationSequence::Perform(Sema &S,
 
         // Build an expression that constructs a temporary.
         CurInit = S.BuildCXXConstructExpr(Loc, Step->Type, Constructor,
-                                          move_arg(ConstructorArgs),
+                                          ConstructorArgs,
                                           HadMultipleCandidates,
                                           /*ZeroInit*/ false,
                                           CXXConstructExpr::CK_Complete,
@@ -5079,7 +5079,7 @@ InitializationSequence::Perform(Sema &S,
                                                 FoundFn, Conversion);
         if(CurInitExprRes.isInvalid())
           return ExprError();
-        CurInit = move(CurInitExprRes);
+        CurInit = CurInitExprRes;
 
         // Build the actual call to the conversion function.
         CurInit = S.BuildCXXMemberCallExpr(CurInit.get(), FoundFn, Conversion,
@@ -5115,7 +5115,7 @@ InitializationSequence::Perform(Sema &S,
         CurInit = S.MaybeBindToTemporary(CurInit.takeAs<Expr>());
       if (RequiresCopy)
         CurInit = CopyObject(S, Entity.getType().getNonReferenceType(), Entity,
-                             move(CurInit), /*IsExtraneousCopy=*/false);
+                             CurInit, /*IsExtraneousCopy=*/false);
       break;
     }
 
@@ -5144,7 +5144,7 @@ InitializationSequence::Perform(Sema &S,
                                     getAssignmentAction(Entity), CCK);
       if (CurInitExprRes.isInvalid())
         return ExprError();
-      CurInit = move(CurInitExprRes);
+      CurInit = CurInitExprRes;
       break;
     }
 
@@ -5195,13 +5195,13 @@ InitializationSequence::Perform(Sema &S,
                                         Entity.getType().getNonReferenceType());
       bool UseTemporary = Entity.getType()->isReferenceType();
       assert(Args.size() == 1 && "expected a single argument for list init");
-      InitListExpr *InitList = cast<InitListExpr>(Args.get()[0]);
+      InitListExpr *InitList = cast<InitListExpr>(Args[0]);
       S.Diag(InitList->getExprLoc(), diag::warn_cxx98_compat_ctor_list_init)
         << InitList->getSourceRange();
       MultiExprArg Arg(InitList->getInits(), InitList->getNumInits());
       CurInit = PerformConstructorInitialization(S, UseTemporary ? TempEntity :
                                                                    Entity,
-                                                 Kind, move(Arg), *Step,
+                                                 Kind, Arg, *Step,
                                                ConstructorInitRequiresZeroInit);
       break;
     }
@@ -5214,7 +5214,7 @@ InitializationSequence::Perform(Sema &S,
       Expr *E = CurInit.take();
       InitListExpr *Syntactic = Step->WrappingSyntacticList;
       InitListExpr *ILE = new (S.Context) InitListExpr(S.Context,
-          Syntactic->getLBraceLoc(), &E, 1, Syntactic->getRBraceLoc());
+          Syntactic->getLBraceLoc(), E, Syntactic->getRBraceLoc());
       ILE->setSyntacticForm(Syntactic);
       ILE->setType(E->getType());
       ILE->setValueKind(E->getValueKind());
@@ -5234,7 +5234,7 @@ InitializationSequence::Perform(Sema &S,
       bool UseTemporary = Entity.getType()->isReferenceType();
       CurInit = PerformConstructorInitialization(S, UseTemporary ? TempEntity
                                                                  : Entity,
-                                                 Kind, move(Args), *Step,
+                                                 Kind, Args, *Step,
                                                ConstructorInitRequiresZeroInit);
       break;
     }
@@ -5268,15 +5268,15 @@ InitializationSequence::Perform(Sema &S,
 
     case SK_CAssignment: {
       QualType SourceType = CurInit.get()->getType();
-      ExprResult Result = move(CurInit);
+      ExprResult Result = CurInit;
       Sema::AssignConvertType ConvTy =
         S.CheckSingleAssignmentConstraints(Step->Type, Result);
       if (Result.isInvalid())
         return ExprError();
-      CurInit = move(Result);
+      CurInit = Result;
 
       // If this is a call, allow conversion to a transparent union.
-      ExprResult CurInitExprRes = move(CurInit);
+      ExprResult CurInitExprRes = CurInit;
       if (ConvTy != Sema::Compatible &&
           Entity.getKind() == InitializedEntity::EK_Parameter &&
           S.CheckTransparentUnionArgumentConstraints(Step->Type, CurInitExprRes)
@@ -5284,7 +5284,7 @@ InitializationSequence::Perform(Sema &S,
         ConvTy = Sema::Compatible;
       if (CurInitExprRes.isInvalid())
         return ExprError();
-      CurInit = move(CurInitExprRes);
+      CurInit = CurInitExprRes;
 
       bool Complained;
       if (S.DiagnoseAssignmentResult(ConvTy, Kind.getLocation(),
@@ -5398,7 +5398,7 @@ InitializationSequence::Perform(Sema &S,
       }
       InitListExpr *Semantic = new (S.Context)
           InitListExpr(S.Context, ILE->getLBraceLoc(),
-                       Converted.data(), NumInits, ILE->getRBraceLoc());
+                       Converted, ILE->getRBraceLoc());
       Semantic->setSyntacticForm(ILE);
       Semantic->setType(Dest);
       Semantic->setInitializesStdInitializerList();
@@ -5415,7 +5415,7 @@ InitializationSequence::Perform(Sema &S,
                                   cast<FieldDecl>(Entity.getDecl()),
                                   CurInit.get());
 
-  return move(CurInit);
+  return CurInit;
 }
 
 //===----------------------------------------------------------------------===//
diff --git a/lib/Sema/SemaLambda.cpp b/lib/Sema/SemaLambda.cpp
index 6414c6fbac97..15cd2a73e7f7 100644
--- a/lib/Sema/SemaLambda.cpp
+++ b/lib/Sema/SemaLambda.cpp
@@ -22,13 +22,14 @@ using namespace clang;
 using namespace sema;
 
 CXXRecordDecl *Sema::createLambdaClosureType(SourceRange IntroducerRange,
+                                             TypeSourceInfo *Info,
                                              bool KnownDependent) {
   DeclContext *DC = CurContext;
   while (!(DC->isFunctionOrMethod() || DC->isRecord() || DC->isFileContext()))
     DC = DC->getParent();
   
   // Start constructing the lambda class.
-  CXXRecordDecl *Class = CXXRecordDecl::CreateLambda(Context, DC, 
+  CXXRecordDecl *Class = CXXRecordDecl::CreateLambda(Context, DC, Info,
                                                      IntroducerRange.getBegin(),
                                                      KnownDependent);
   DC->addDecl(Class);
@@ -369,15 +370,13 @@ void Sema::ActOnStartOfLambdaDefinition(LambdaIntroducer &Intro,
     if (!TmplScope->decl_empty())
       KnownDependent = true;
   
-  CXXRecordDecl *Class = createLambdaClosureType(Intro.Range, KnownDependent);
-  
   // Determine the signature of the call operator.
   TypeSourceInfo *MethodTyInfo;
   bool ExplicitParams = true;
   bool ExplicitResultType = true;
   bool ContainsUnexpandedParameterPack = false;
   SourceLocation EndLoc;
-  llvm::ArrayRef<ParmVarDecl *> Params;
+  llvm::SmallVector<ParmVarDecl *, 8> Params;
   if (ParamInfo.getNumTypeObjects() == 0) {
     // C++11 [expr.prim.lambda]p4:
     //   If a lambda-expression does not include a lambda-declarator, it is as 
@@ -410,17 +409,25 @@ void Sema::ActOnStartOfLambdaDefinition(LambdaIntroducer &Intro,
     ExplicitResultType
       = MethodTyInfo->getType()->getAs<FunctionType>()->getResultType() 
                                                         != Context.DependentTy;
-    
-    TypeLoc TL = MethodTyInfo->getTypeLoc();
-    FunctionProtoTypeLoc Proto = cast<FunctionProtoTypeLoc>(TL);
-    Params = llvm::ArrayRef<ParmVarDecl *>(Proto.getParmArray(), 
-                                           Proto.getNumArgs());
+
+    if (FTI.NumArgs == 1 && !FTI.isVariadic && FTI.ArgInfo[0].Ident == 0 &&
+        cast<ParmVarDecl>(FTI.ArgInfo[0].Param)->getType()->isVoidType()) {
+      // Empty arg list, don't push any params.
+      checkVoidParamDecl(cast<ParmVarDecl>(FTI.ArgInfo[0].Param));
+    } else {
+      Params.reserve(FTI.NumArgs);
+      for (unsigned i = 0, e = FTI.NumArgs; i != e; ++i)
+        Params.push_back(cast<ParmVarDecl>(FTI.ArgInfo[i].Param));
+    }
 
     // Check for unexpanded parameter packs in the method type.
     if (MethodTyInfo->getType()->containsUnexpandedParameterPack())
       ContainsUnexpandedParameterPack = true;
   }
-  
+
+  CXXRecordDecl *Class = createLambdaClosureType(Intro.Range, MethodTyInfo,
+                                                 KnownDependent);
+
   CXXMethodDecl *Method = startLambdaDefinition(Class, Intro.Range,
                                                 MethodTyInfo, EndLoc, Params);
   
@@ -528,6 +535,10 @@ void Sema::ActOnStartOfLambdaDefinition(LambdaIntroducer &Intro,
       continue;
     }
 
+    // Ignore invalid decls; they'll just confuse the code later.
+    if (Var->isInvalidDecl())
+      continue;
+
     if (!Var->hasLocalStorage()) {
       Diag(C->Loc, diag::err_capture_non_automatic_variable) << C->Id;
       Diag(Var->getLocation(), diag::note_previous_decl) << C->Id;
diff --git a/lib/Sema/SemaLookup.cpp b/lib/Sema/SemaLookup.cpp
index dad196b410c4..f6987e7bfbe0 100644
--- a/lib/Sema/SemaLookup.cpp
+++ b/lib/Sema/SemaLookup.cpp
@@ -707,7 +707,7 @@ static bool LookupDirect(Sema &S, LookupResult &R, const DeclContext *DC) {
     // result), perform template argument deduction and place the
     // specialization into the result set. We do this to avoid forcing all
     // callers to perform special deduction for conversion functions.
-    TemplateDeductionInfo Info(R.getSema().Context, R.getNameLoc());
+    TemplateDeductionInfo Info(R.getNameLoc());
     FunctionDecl *Specialization = 0;
 
     const FunctionProtoType *ConvProto
@@ -1725,15 +1725,17 @@ bool Sema::DiagnoseAmbiguousLookup(LookupResult &Result) {
 
 namespace {
   struct AssociatedLookup {
-    AssociatedLookup(Sema &S,
+    AssociatedLookup(Sema &S, SourceLocation InstantiationLoc,
                      Sema::AssociatedNamespaceSet &Namespaces,
                      Sema::AssociatedClassSet &Classes)
-      : S(S), Namespaces(Namespaces), Classes(Classes) {
+      : S(S), Namespaces(Namespaces), Classes(Classes),
+        InstantiationLoc(InstantiationLoc) {
     }
 
     Sema &S;
     Sema::AssociatedNamespaceSet &Namespaces;
     Sema::AssociatedClassSet &Classes;
+    SourceLocation InstantiationLoc;
   };
 }
 
@@ -1796,6 +1798,7 @@ addAssociatedClassesAndNamespaces(AssociatedLookup &Result,
     case TemplateArgument::Declaration:
     case TemplateArgument::Integral:
     case TemplateArgument::Expression:
+    case TemplateArgument::NullPtr:
       // [Note: non-type template arguments do not contribute to the set of
       //  associated namespaces. ]
       break;
@@ -1864,8 +1867,10 @@ addAssociatedClassesAndNamespaces(AssociatedLookup &Result,
 
   // Only recurse into base classes for complete types.
   if (!Class->hasDefinition()) {
-    // FIXME: we might need to instantiate templates here
-    return;
+    QualType type = Result.S.Context.getTypeDeclType(Class);
+    if (Result.S.RequireCompleteType(Result.InstantiationLoc, type,
+                                     /*no diagnostic*/ 0))
+      return;
   }
 
   // Add direct and indirect base classes along with their associated
@@ -2069,13 +2074,15 @@ addAssociatedClassesAndNamespaces(AssociatedLookup &Result, QualType Ty) {
 /// namespaces searched by argument-dependent lookup
 /// (C++ [basic.lookup.argdep]) for a given set of arguments.
 void
-Sema::FindAssociatedClassesAndNamespaces(llvm::ArrayRef<Expr *> Args,
+Sema::FindAssociatedClassesAndNamespaces(SourceLocation InstantiationLoc,
+                                         llvm::ArrayRef<Expr *> Args,
                                  AssociatedNamespaceSet &AssociatedNamespaces,
                                  AssociatedClassSet &AssociatedClasses) {
   AssociatedNamespaces.clear();
   AssociatedClasses.clear();
 
-  AssociatedLookup Result(*this, AssociatedNamespaces, AssociatedClasses);
+  AssociatedLookup Result(*this, InstantiationLoc,
+                          AssociatedNamespaces, AssociatedClasses);
 
   // C++ [basic.lookup.koenig]p2:
   //   For each argument type T in the function call, there is a set
@@ -2642,17 +2649,14 @@ void ADLResult::insert(NamedDecl *New) {
 void Sema::ArgumentDependentLookup(DeclarationName Name, bool Operator,
                                    SourceLocation Loc,
                                    llvm::ArrayRef<Expr *> Args,
-                                   ADLResult &Result,
-                                   bool StdNamespaceIsAssociated) {
+                                   ADLResult &Result) {
   // Find all of the associated namespaces and classes based on the
   // arguments we have.
   AssociatedNamespaceSet AssociatedNamespaces;
   AssociatedClassSet AssociatedClasses;
-  FindAssociatedClassesAndNamespaces(Args,
+  FindAssociatedClassesAndNamespaces(Loc, Args,
                                      AssociatedNamespaces,
                                      AssociatedClasses);
-  if (StdNamespaceIsAssociated && StdNamespace)
-    AssociatedNamespaces.insert(getStdNamespace());
 
   QualType T1, T2;
   if (Operator) {
@@ -2661,13 +2665,6 @@ void Sema::ArgumentDependentLookup(DeclarationName Name, bool Operator,
       T2 = Args[1]->getType();
   }
 
-  // Try to complete all associated classes, in case they contain a
-  // declaration of a friend function.
-  for (AssociatedClassSet::iterator C = AssociatedClasses.begin(),
-                                    CEnd = AssociatedClasses.end();
-       C != CEnd; ++C)
-    RequireCompleteType(Loc, Context.getRecordType(*C), 0);
-
   // C++ [basic.lookup.argdep]p3:
   //   Let X be the lookup set produced by unqualified lookup (3.4.1)
   //   and let Y be the lookup set produced by argument dependent
@@ -4056,7 +4053,9 @@ TypoCorrection Sema::CorrectTypo(const DeclarationNameInfo &TypoName,
     if (IsUnqualifiedLookup)
       UnqualifiedTyposCorrected[Typo] = Result;
 
-    return Result;
+    TypoCorrection TC = Result;
+    TC.setCorrectionRange(SS, TypoName);
+    return TC;
   }
   else if (BestResults.size() > 1
            // Ugly hack equivalent to CTC == CTC_ObjCMessageReceiver;
@@ -4076,7 +4075,9 @@ TypoCorrection Sema::CorrectTypo(const DeclarationNameInfo &TypoName,
     if (IsUnqualifiedLookup)
       UnqualifiedTyposCorrected[Typo] = BestResults["super"].front();
 
-    return BestResults["super"].front();
+    TypoCorrection TC = BestResults["super"].front();
+    TC.setCorrectionRange(SS, TypoName);
+    return TC;
   }
 
   // If this was an unqualified lookup and we believe the callback object did
diff --git a/lib/Sema/SemaObjCProperty.cpp b/lib/Sema/SemaObjCProperty.cpp
index 27deab226f91..8d708607f6eb 100644
--- a/lib/Sema/SemaObjCProperty.cpp
+++ b/lib/Sema/SemaObjCProperty.cpp
@@ -22,6 +22,7 @@
 #include "clang/Basic/SourceManager.h"
 #include "llvm/ADT/DenseSet.h"
 #include "llvm/ADT/SmallString.h"
+#include "clang/Lex/Preprocessor.h"
 
 using namespace clang;
 
@@ -43,7 +44,7 @@ static Qualifiers::ObjCLifetime getImpliedARCOwnership(
   if (attrs & (ObjCPropertyDecl::OBJC_PR_retain |
                ObjCPropertyDecl::OBJC_PR_strong |
                ObjCPropertyDecl::OBJC_PR_copy)) {
-    return type->getObjCARCImplicitLifetime();
+    return Qualifiers::OCL_Strong;
   } else if (attrs & ObjCPropertyDecl::OBJC_PR_weak) {
     return Qualifiers::OCL_Weak;
   } else if (attrs & ObjCPropertyDecl::OBJC_PR_unsafe_unretained) {
@@ -102,6 +103,15 @@ static void checkARCPropertyDecl(Sema &S, ObjCPropertyDecl *property) {
     << propertyLifetime;
 }
 
+static unsigned deduceWeakPropertyFromType(Sema &S, QualType T) {
+  if ((S.getLangOpts().getGC() != LangOptions::NonGC && 
+       T.isObjCGCWeak()) ||
+      (S.getLangOpts().ObjCAutoRefCount &&
+       T.getObjCLifetime() == Qualifiers::OCL_Weak))
+    return ObjCDeclSpec::DQ_PR_weak;
+  return 0;
+}
+
 Decl *Sema::ActOnProperty(Scope *S, SourceLocation AtLoc,
                           SourceLocation LParenLoc,
                           FieldDeclarator &FD,
@@ -114,12 +124,8 @@ Decl *Sema::ActOnProperty(Scope *S, SourceLocation AtLoc,
   unsigned Attributes = ODS.getPropertyAttributes();
   TypeSourceInfo *TSI = GetTypeForDeclarator(FD.D, S);
   QualType T = TSI->getType();
-  if ((getLangOpts().getGC() != LangOptions::NonGC && 
-       T.isObjCGCWeak()) ||
-      (getLangOpts().ObjCAutoRefCount &&
-       T.getObjCLifetime() == Qualifiers::OCL_Weak))
-    Attributes |= ObjCDeclSpec::DQ_PR_weak;
-
+  Attributes |= deduceWeakPropertyFromType(*this, T);
+  
   bool isReadWrite = ((Attributes & ObjCDeclSpec::DQ_PR_readwrite) ||
                       // default is readwrite!
                       !(Attributes & ObjCDeclSpec::DQ_PR_readonly));
@@ -236,6 +242,15 @@ static bool LocPropertyAttribute( ASTContext &Context, const char *attrName,
   
 }
 
+static unsigned getOwnershipRule(unsigned attr) {
+  return attr & (ObjCPropertyDecl::OBJC_PR_assign |
+                 ObjCPropertyDecl::OBJC_PR_retain |
+                 ObjCPropertyDecl::OBJC_PR_copy   |
+                 ObjCPropertyDecl::OBJC_PR_weak   |
+                 ObjCPropertyDecl::OBJC_PR_strong |
+                 ObjCPropertyDecl::OBJC_PR_unsafe_unretained);
+}
+
 Decl *
 Sema::HandlePropertyInClassExtension(Scope *S,
                                      SourceLocation AtLoc,
@@ -335,6 +350,7 @@ Sema::HandlePropertyInClassExtension(Scope *S,
       Diag(AtLoc, 
           diag::err_type_mismatch_continuation_class) << PDecl->getType();
       Diag(PIDecl->getLocation(), diag::note_property_declare);
+      return 0;
     }
   }
     
@@ -342,13 +358,11 @@ Sema::HandlePropertyInClassExtension(Scope *S,
   // with continuation class's readwrite property attribute!
   unsigned PIkind = PIDecl->getPropertyAttributesAsWritten();
   if (isReadWrite && (PIkind & ObjCPropertyDecl::OBJC_PR_readonly)) {
-    unsigned retainCopyNonatomic =
-    (ObjCPropertyDecl::OBJC_PR_retain |
-     ObjCPropertyDecl::OBJC_PR_strong |
-     ObjCPropertyDecl::OBJC_PR_copy |
-     ObjCPropertyDecl::OBJC_PR_nonatomic);
-    if ((Attributes & retainCopyNonatomic) !=
-        (PIkind & retainCopyNonatomic)) {
+    PIkind |= deduceWeakPropertyFromType(*this, PIDecl->getType());
+    unsigned ClassExtensionMemoryModel = getOwnershipRule(Attributes);
+    unsigned PrimaryClassMemoryModel = getOwnershipRule(PIkind);
+    if (PrimaryClassMemoryModel && ClassExtensionMemoryModel &&
+        (PrimaryClassMemoryModel != ClassExtensionMemoryModel)) {
       Diag(AtLoc, diag::warn_property_attr_mismatch);
       Diag(PIDecl->getLocation(), diag::note_property_declare);
     }
@@ -397,6 +411,7 @@ Sema::HandlePropertyInClassExtension(Scope *S,
     Diag(AtLoc, diag)
       << CCPrimary->getDeclName();
     Diag(PIDecl->getLocation(), diag::note_property_declare);
+    return 0;
   }
   *isOverridingProperty = true;
   // Make sure setter decl is synthesized, and added to primary class's list.
@@ -405,7 +420,7 @@ Sema::HandlePropertyInClassExtension(Scope *S,
   PDecl->setSetterMethodDecl(PIDecl->getSetterMethodDecl());
   if (ASTMutationListener *L = Context.getASTMutationListener())
     L->AddedObjCPropertyInClassExtension(PDecl, PIDecl, CDecl);
-  return 0;
+  return PDecl;
 }
 
 ObjCPropertyDecl *Sema::CreatePropertyDecl(Scope *S,
@@ -543,6 +558,23 @@ static void checkARCPropertyImpl(Sema &S, SourceLocation propertyImplLoc,
       ivarLifetime == Qualifiers::OCL_Autoreleasing)
     return;
 
+  // If the ivar is private, and it's implicitly __unsafe_unretained
+  // becaues of its type, then pretend it was actually implicitly
+  // __strong.  This is only sound because we're processing the
+  // property implementation before parsing any method bodies.
+  if (ivarLifetime == Qualifiers::OCL_ExplicitNone &&
+      propertyLifetime == Qualifiers::OCL_Strong &&
+      ivar->getAccessControl() == ObjCIvarDecl::Private) {
+    SplitQualType split = ivarType.split();
+    if (split.Quals.hasObjCLifetime()) {
+      assert(ivarType->isObjCARCImplicitlyUnretainedType());
+      split.Quals.setObjCLifetime(Qualifiers::OCL_Strong);
+      ivarType = S.Context.getQualifiedType(split);
+      ivar->setType(ivarType);
+      return;
+    }
+  }
+
   switch (propertyLifetime) {
   case Qualifiers::OCL_Strong:
     S.Diag(propertyImplLoc, diag::err_arc_strong_property_ownership)
@@ -632,7 +664,13 @@ DiagnoseClassAndClassExtPropertyMismatch(Sema &S, ObjCInterfaceDecl *ClassDecl,
       // property.
       if (Attributes & ObjCDeclSpec::DQ_PR_readonly) {
         if (!classExtPropertyAttr ||
-            (classExtPropertyAttr & ObjCDeclSpec::DQ_PR_readwrite))
+            (classExtPropertyAttr & 
+              (ObjCDeclSpec::DQ_PR_readwrite|
+               ObjCDeclSpec::DQ_PR_assign |
+               ObjCDeclSpec::DQ_PR_unsafe_unretained |
+               ObjCDeclSpec::DQ_PR_copy |
+               ObjCDeclSpec::DQ_PR_retain |
+               ObjCDeclSpec::DQ_PR_strong)))
           continue;
         warn = true;
         break;
@@ -857,13 +895,15 @@ Decl *Sema::ActOnPropertyImplDecl(Scope *S,
           if (lifetime == Qualifiers::OCL_Weak) {
             bool err = false;
             if (const ObjCObjectPointerType *ObjT =
-                PropertyIvarType->getAs<ObjCObjectPointerType>())
-              if (ObjT->getInterfaceDecl()->isArcWeakrefUnavailable()) {
+                PropertyIvarType->getAs<ObjCObjectPointerType>()) {
+              const ObjCInterfaceDecl *ObjI = ObjT->getInterfaceDecl();
+              if (ObjI && ObjI->isArcWeakrefUnavailable()) {
                 Diag(PropertyDiagLoc, diag::err_arc_weak_unavailable_property);
                 Diag(property->getLocation(), diag::note_property_declare);
                 err = true;
               }
-            if (!err && !getLangOpts().ObjCRuntimeHasWeak) {
+            }
+            if (!err && !getLangOpts().ObjCARCWeak) {
               Diag(PropertyDiagLoc, diag::err_arc_weak_no_runtime);
               Diag(property->getLocation(), diag::note_property_declare);
             }
@@ -891,7 +931,6 @@ Decl *Sema::ActOnPropertyImplDecl(Scope *S,
         Ivar->setInvalidDecl();
       ClassImpDecl->addDecl(Ivar);
       IDecl->makeDeclVisibleInContext(Ivar);
-      property->setPropertyIvarDecl(Ivar);
 
       if (getLangOpts().ObjCRuntime.isFragile())
         Diag(PropertyDiagLoc, diag::error_missing_property_ivar_decl)
@@ -907,14 +946,15 @@ Decl *Sema::ActOnPropertyImplDecl(Scope *S,
       << Ivar << Ivar->getName();
       // Note! I deliberately want it to fall thru so more errors are caught.
     }
+    property->setPropertyIvarDecl(Ivar);
+
     QualType IvarType = Context.getCanonicalType(Ivar->getType());
 
     // Check that type of property and its ivar are type compatible.
     if (!Context.hasSameType(PropertyIvarType, IvarType)) {
-      compat = false;
       if (isa<ObjCObjectPointerType>(PropertyIvarType) 
           && isa<ObjCObjectPointerType>(IvarType))
-        compat = 
+        compat =
           Context.canAssignObjCInterfaces(
                                   PropertyIvarType->getAs<ObjCObjectPointerType>(),
                                   IvarType->getAs<ObjCObjectPointerType>());
@@ -988,19 +1028,21 @@ Decl *Sema::ActOnPropertyImplDecl(Scope *S,
       // For Objective-C++, need to synthesize the AST for the IVAR object to be
       // returned by the getter as it must conform to C++'s copy-return rules.
       // FIXME. Eventually we want to do this for Objective-C as well.
+      SynthesizedFunctionScope Scope(*this, getterMethod);
       ImplicitParamDecl *SelfDecl = getterMethod->getSelfDecl();
       DeclRefExpr *SelfExpr = 
         new (Context) DeclRefExpr(SelfDecl, false, SelfDecl->getType(),
-                                  VK_RValue, SourceLocation());
+                                  VK_RValue, PropertyDiagLoc);
+      MarkDeclRefReferenced(SelfExpr);
       Expr *IvarRefExpr =
-        new (Context) ObjCIvarRefExpr(Ivar, Ivar->getType(), AtLoc,
+        new (Context) ObjCIvarRefExpr(Ivar, Ivar->getType(), PropertyDiagLoc,
                                       SelfExpr, true, true);
       ExprResult Res = 
         PerformCopyInitialization(InitializedEntity::InitializeResult(
-                                    SourceLocation(),
+                                    PropertyDiagLoc,
                                     getterMethod->getResultType(),
                                     /*NRVO=*/false),
-                                  SourceLocation(),
+                                  PropertyDiagLoc,
                                   Owned(IvarRefExpr));
       if (!Res.isInvalid()) {
         Expr *ResExpr = Res.takeAs<Expr>();
@@ -1021,19 +1063,22 @@ Decl *Sema::ActOnPropertyImplDecl(Scope *S,
     if (getLangOpts().CPlusPlus && Synthesize && !CompleteTypeErr &&
         Ivar->getType()->isRecordType()) {
       // FIXME. Eventually we want to do this for Objective-C as well.
+      SynthesizedFunctionScope Scope(*this, setterMethod);
       ImplicitParamDecl *SelfDecl = setterMethod->getSelfDecl();
       DeclRefExpr *SelfExpr = 
         new (Context) DeclRefExpr(SelfDecl, false, SelfDecl->getType(),
-                                  VK_RValue, SourceLocation());
+                                  VK_RValue, PropertyDiagLoc);
+      MarkDeclRefReferenced(SelfExpr);
       Expr *lhs =
-        new (Context) ObjCIvarRefExpr(Ivar, Ivar->getType(), AtLoc,
+        new (Context) ObjCIvarRefExpr(Ivar, Ivar->getType(), PropertyDiagLoc,
                                       SelfExpr, true, true);
       ObjCMethodDecl::param_iterator P = setterMethod->param_begin();
       ParmVarDecl *Param = (*P);
       QualType T = Param->getType().getNonReferenceType();
-      Expr *rhs = new (Context) DeclRefExpr(Param, false, T,
-                                            VK_LValue, SourceLocation());
-      ExprResult Res = BuildBinOp(S, lhs->getLocEnd(), 
+      DeclRefExpr *rhs = new (Context) DeclRefExpr(Param, false, T,
+                                                   VK_LValue, PropertyDiagLoc);
+      MarkDeclRefReferenced(rhs);
+      ExprResult Res = BuildBinOp(S, PropertyDiagLoc, 
                                   BO_Assign, lhs, rhs);
       if (property->getPropertyAttributes() & 
           ObjCPropertyDecl::OBJC_PR_atomic) {
@@ -1043,7 +1088,7 @@ Decl *Sema::ActOnPropertyImplDecl(Scope *S,
           if (const FunctionDecl *FuncDecl = CXXCE->getDirectCallee())
             if (!FuncDecl->isTrivial())
               if (property->getType()->isReferenceType()) {
-                Diag(PropertyLoc, 
+                Diag(PropertyDiagLoc, 
                      diag::err_atomic_property_nontrivial_assign_op)
                     << property->getType();
                 Diag(FuncDecl->getLocStart(), 
@@ -1395,8 +1440,8 @@ bool Sema::isPropertyReadonly(ObjCPropertyDecl *PDecl,
 /// CollectImmediateProperties - This routine collects all properties in
 /// the class and its conforming protocols; but not those it its super class.
 void Sema::CollectImmediateProperties(ObjCContainerDecl *CDecl,
-            llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& PropMap,
-            llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& SuperPropMap) {
+            ObjCContainerDecl::PropertyMap &PropMap,
+            ObjCContainerDecl::PropertyMap &SuperPropMap) {
   if (ObjCInterfaceDecl *IDecl = dyn_cast<ObjCInterfaceDecl>(CDecl)) {
     for (ObjCContainerDecl::prop_iterator P = IDecl->prop_begin(),
          E = IDecl->prop_end(); P != E; ++P) {
@@ -1442,118 +1487,38 @@ void Sema::CollectImmediateProperties(ObjCContainerDecl *CDecl,
   }
 }
 
-/// CollectClassPropertyImplementations - This routine collects list of
-/// properties to be implemented in the class. This includes, class's
-/// and its conforming protocols' properties.
-static void CollectClassPropertyImplementations(ObjCContainerDecl *CDecl,
-                llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& PropMap) {
-  if (ObjCInterfaceDecl *IDecl = dyn_cast<ObjCInterfaceDecl>(CDecl)) {
-    for (ObjCContainerDecl::prop_iterator P = IDecl->prop_begin(),
-         E = IDecl->prop_end(); P != E; ++P) {
-      ObjCPropertyDecl *Prop = *P;
-      PropMap[Prop->getIdentifier()] = Prop;
-    }
-    for (ObjCInterfaceDecl::all_protocol_iterator
-         PI = IDecl->all_referenced_protocol_begin(),
-         E = IDecl->all_referenced_protocol_end(); PI != E; ++PI)
-      CollectClassPropertyImplementations((*PI), PropMap);
-  }
-  else if (ObjCProtocolDecl *PDecl = dyn_cast<ObjCProtocolDecl>(CDecl)) {
-    for (ObjCProtocolDecl::prop_iterator P = PDecl->prop_begin(),
-         E = PDecl->prop_end(); P != E; ++P) {
-      ObjCPropertyDecl *Prop = *P;
-      if (!PropMap.count(Prop->getIdentifier()))
-        PropMap[Prop->getIdentifier()] = Prop;
-    }
-    // scan through protocol's protocols.
-    for (ObjCProtocolDecl::protocol_iterator PI = PDecl->protocol_begin(),
-         E = PDecl->protocol_end(); PI != E; ++PI)
-      CollectClassPropertyImplementations((*PI), PropMap);
-  }
-}
-
 /// CollectSuperClassPropertyImplementations - This routine collects list of
 /// properties to be implemented in super class(s) and also coming from their
 /// conforming protocols.
 static void CollectSuperClassPropertyImplementations(ObjCInterfaceDecl *CDecl,
-                llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& PropMap) {
+                                    ObjCInterfaceDecl::PropertyMap &PropMap) {
   if (ObjCInterfaceDecl *SDecl = CDecl->getSuperClass()) {
     while (SDecl) {
-      CollectClassPropertyImplementations(SDecl, PropMap);
+      SDecl->collectPropertiesToImplement(PropMap);
       SDecl = SDecl->getSuperClass();
     }
   }
 }
 
-/// LookupPropertyDecl - Looks up a property in the current class and all
-/// its protocols.
-ObjCPropertyDecl *Sema::LookupPropertyDecl(const ObjCContainerDecl *CDecl,
-                                     IdentifierInfo *II) {
-  if (const ObjCInterfaceDecl *IDecl =
-        dyn_cast<ObjCInterfaceDecl>(CDecl)) {
-    for (ObjCContainerDecl::prop_iterator P = IDecl->prop_begin(),
-         E = IDecl->prop_end(); P != E; ++P) {
-      ObjCPropertyDecl *Prop = *P;
-      if (Prop->getIdentifier() == II)
-        return Prop;
-    }
-    // scan through class's protocols.
-    for (ObjCInterfaceDecl::all_protocol_iterator
-         PI = IDecl->all_referenced_protocol_begin(),
-         E = IDecl->all_referenced_protocol_end(); PI != E; ++PI) {
-      ObjCPropertyDecl *Prop = LookupPropertyDecl((*PI), II);
-      if (Prop)
-        return Prop;
-    }
-  }
-  else if (const ObjCProtocolDecl *PDecl =
-            dyn_cast<ObjCProtocolDecl>(CDecl)) {
-    for (ObjCProtocolDecl::prop_iterator P = PDecl->prop_begin(),
-         E = PDecl->prop_end(); P != E; ++P) {
-      ObjCPropertyDecl *Prop = *P;
-      if (Prop->getIdentifier() == II)
-        return Prop;
-    }
-    // scan through protocol's protocols.
-    for (ObjCProtocolDecl::protocol_iterator PI = PDecl->protocol_begin(),
-         E = PDecl->protocol_end(); PI != E; ++PI) {
-      ObjCPropertyDecl *Prop = LookupPropertyDecl((*PI), II);
-      if (Prop)
-        return Prop;
-    }
-  }
-  return 0;
-}
-
-static IdentifierInfo * getDefaultSynthIvarName(ObjCPropertyDecl *Prop,
-                                                ASTContext &Ctx) {
-  SmallString<128> ivarName;
-  {
-    llvm::raw_svector_ostream os(ivarName);
-    os << '_' << Prop->getIdentifier()->getName();
-  }
-  return &Ctx.Idents.get(ivarName.str());
-}
-
 /// \brief Default synthesizes all properties which must be synthesized
 /// in class's \@implementation.
 void Sema::DefaultSynthesizeProperties(Scope *S, ObjCImplDecl* IMPDecl,
                                        ObjCInterfaceDecl *IDecl) {
   
-  llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*> PropMap;
-  CollectClassPropertyImplementations(IDecl, PropMap);
+  ObjCInterfaceDecl::PropertyMap PropMap;
+  IDecl->collectPropertiesToImplement(PropMap);
   if (PropMap.empty())
     return;
-  llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*> SuperPropMap;
+  ObjCInterfaceDecl::PropertyMap SuperPropMap;
   CollectSuperClassPropertyImplementations(IDecl, SuperPropMap);
   
-  for (llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>::iterator
+  for (ObjCInterfaceDecl::PropertyMap::iterator
        P = PropMap.begin(), E = PropMap.end(); P != E; ++P) {
     ObjCPropertyDecl *Prop = P->second;
     // If property to be implemented in the super class, ignore.
     if (SuperPropMap[Prop->getIdentifier()])
       continue;
-    // Is there a matching propery synthesize/dynamic?
+    // Is there a matching property synthesize/dynamic?
     if (Prop->isInvalidDecl() ||
         Prop->getPropertyImplementation() == ObjCPropertyDecl::Optional ||
         IMPDecl->FindPropertyImplIvarDecl(Prop->getIdentifier()))
@@ -1583,7 +1548,7 @@ void Sema::DefaultSynthesizeProperties(Scope *S, ObjCImplDecl* IMPDecl,
       ActOnPropertyImplDecl(S, SourceLocation(), SourceLocation(),
                             true,
                             /* property = */ Prop->getIdentifier(),
-                            /* ivar = */ getDefaultSynthIvarName(Prop, Context),
+                            /* ivar = */ Prop->getDefaultSynthIvarName(Context),
                             Prop->getLocation()));
     if (PIDecl) {
       Diag(Prop->getLocation(), diag::warn_missing_explicit_synthesis);
@@ -1606,11 +1571,11 @@ void Sema::DefaultSynthesizeProperties(Scope *S, Decl *D) {
 void Sema::DiagnoseUnimplementedProperties(Scope *S, ObjCImplDecl* IMPDecl,
                                       ObjCContainerDecl *CDecl,
                                       const SelectorSet &InsMap) {
-  llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*> SuperPropMap;
+  ObjCContainerDecl::PropertyMap SuperPropMap;
   if (ObjCInterfaceDecl *IDecl = dyn_cast<ObjCInterfaceDecl>(CDecl))
     CollectSuperClassPropertyImplementations(IDecl, SuperPropMap);
   
-  llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*> PropMap;
+  ObjCContainerDecl::PropertyMap PropMap;
   CollectImmediateProperties(CDecl, PropMap, SuperPropMap);
   if (PropMap.empty())
     return;
@@ -1621,7 +1586,7 @@ void Sema::DiagnoseUnimplementedProperties(Scope *S, ObjCImplDecl* IMPDecl,
        EI = IMPDecl->propimpl_end(); I != EI; ++I)
     PropImplMap.insert(I->getPropertyDecl());
 
-  for (llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>::iterator
+  for (ObjCContainerDecl::PropertyMap::iterator
        P = PropMap.begin(), E = PropMap.end(); P != E; ++P) {
     ObjCPropertyDecl *Prop = P->second;
     // Is there a matching propery synthesize/dynamic?
@@ -1847,7 +1812,7 @@ void Sema::ProcessPropertyDecl(ObjCPropertyDecl *property,
     GetterMethod = ObjCMethodDecl::Create(Context, Loc, Loc,
                              property->getGetterName(),
                              property->getType(), 0, CD, /*isInstance=*/true,
-                             /*isVariadic=*/false, /*isSynthesized=*/true,
+                             /*isVariadic=*/false, /*isPropertyAccessor=*/true,
                              /*isImplicitlyDeclared=*/true, /*isDefined=*/false,
                              (property->getPropertyImplementation() ==
                               ObjCPropertyDecl::Optional) ?
@@ -1867,7 +1832,7 @@ void Sema::ProcessPropertyDecl(ObjCPropertyDecl *property,
   } else
     // A user declared getter will be synthesize when @synthesize of
     // the property with the same name is seen in the @implementation
-    GetterMethod->setSynthesized(true);
+    GetterMethod->setPropertyAccessor(true);
   property->setGetterMethodDecl(GetterMethod);
 
   // Skip setter if property is read-only.
@@ -1885,7 +1850,7 @@ void Sema::ProcessPropertyDecl(ObjCPropertyDecl *property,
         ObjCMethodDecl::Create(Context, Loc, Loc,
                                property->getSetterName(), Context.VoidTy, 0,
                                CD, /*isInstance=*/true, /*isVariadic=*/false,
-                               /*isSynthesized=*/true,
+                               /*isPropertyAccessor=*/true,
                                /*isImplicitlyDeclared=*/true,
                                /*isDefined=*/false,
                                (property->getPropertyImplementation() ==
@@ -1916,7 +1881,7 @@ void Sema::ProcessPropertyDecl(ObjCPropertyDecl *property,
     } else
       // A user declared setter will be synthesize when @synthesize of
       // the property with the same name is seen in the @implementation
-      SetterMethod->setSynthesized(true);
+      SetterMethod->setPropertyAccessor(true);
     property->setSetterMethodDecl(SetterMethod);
   }
   // Add any synthesized methods to the global pool. This allows us to
@@ -2121,7 +2086,9 @@ void Sema::CheckObjCPropertyAttributes(Decl *PDecl,
         // issue any warning.
         if (isAnyClassTy && getLangOpts().getGC() == LangOptions::NonGC)
           ;
-        else {
+        else if (propertyInPrimaryClass) {
+          // Don't issue warning on property with no life time in class 
+          // extension as it is inherited from property in primary class.
           // Skip this warning in gc-only mode.
           if (getLangOpts().getGC() != LangOptions::GCOnly)
             Diag(Loc, diag::warn_objc_property_no_assignment_attribute);
diff --git a/lib/Sema/SemaOverload.cpp b/lib/Sema/SemaOverload.cpp
index 9382f7dddc6c..911187857fe1 100644
--- a/lib/Sema/SemaOverload.cpp
+++ b/lib/Sema/SemaOverload.cpp
@@ -49,7 +49,7 @@ CreateFunctionRefExpr(Sema &S, FunctionDecl *Fn, bool HadMultipleCandidates,
   E = S.DefaultFunctionArrayConversion(E.take());
   if (E.isInvalid())
     return ExprError();
-  return move(E);
+  return E;
 }
 
 static bool IsStandardConversion(Sema &S, Expr* From, QualType ToType,
@@ -555,6 +555,7 @@ static MakeDeductionFailureInfo(ASTContext &Context,
   Result.Data = 0;
   switch (TDK) {
   case Sema::TDK_Success:
+  case Sema::TDK_Invalid:
   case Sema::TDK_InstantiationDepth:
   case Sema::TDK_TooManyArguments:
   case Sema::TDK_TooFewArguments:
@@ -597,6 +598,7 @@ static MakeDeductionFailureInfo(ASTContext &Context,
 void OverloadCandidate::DeductionFailureInfo::Destroy() {
   switch (static_cast<Sema::TemplateDeductionResult>(Result)) {
   case Sema::TDK_Success:
+  case Sema::TDK_Invalid:
   case Sema::TDK_InstantiationDepth:
   case Sema::TDK_Incomplete:
   case Sema::TDK_TooManyArguments:
@@ -637,6 +639,7 @@ TemplateParameter
 OverloadCandidate::DeductionFailureInfo::getTemplateParameter() {
   switch (static_cast<Sema::TemplateDeductionResult>(Result)) {
   case Sema::TDK_Success:
+  case Sema::TDK_Invalid:
   case Sema::TDK_InstantiationDepth:
   case Sema::TDK_TooManyArguments:
   case Sema::TDK_TooFewArguments:
@@ -664,6 +667,7 @@ TemplateArgumentList *
 OverloadCandidate::DeductionFailureInfo::getTemplateArgumentList() {
   switch (static_cast<Sema::TemplateDeductionResult>(Result)) {
     case Sema::TDK_Success:
+    case Sema::TDK_Invalid:
     case Sema::TDK_InstantiationDepth:
     case Sema::TDK_TooManyArguments:
     case Sema::TDK_TooFewArguments:
@@ -688,6 +692,7 @@ OverloadCandidate::DeductionFailureInfo::getTemplateArgumentList() {
 const TemplateArgument *OverloadCandidate::DeductionFailureInfo::getFirstArg() {
   switch (static_cast<Sema::TemplateDeductionResult>(Result)) {
   case Sema::TDK_Success:
+  case Sema::TDK_Invalid:
   case Sema::TDK_InstantiationDepth:
   case Sema::TDK_Incomplete:
   case Sema::TDK_TooManyArguments:
@@ -713,6 +718,7 @@ const TemplateArgument *
 OverloadCandidate::DeductionFailureInfo::getSecondArg() {
   switch (static_cast<Sema::TemplateDeductionResult>(Result)) {
   case Sema::TDK_Success:
+  case Sema::TDK_Invalid:
   case Sema::TDK_InstantiationDepth:
   case Sema::TDK_Incomplete:
   case Sema::TDK_TooManyArguments:
@@ -734,13 +740,17 @@ OverloadCandidate::DeductionFailureInfo::getSecondArg() {
   return 0;
 }
 
-void OverloadCandidateSet::clear() {
+void OverloadCandidateSet::destroyCandidates() {
   for (iterator i = begin(), e = end(); i != e; ++i) {
     for (unsigned ii = 0, ie = i->NumConversions; ii != ie; ++ii)
       i->Conversions[ii].~ImplicitConversionSequence();
     if (!i->Viable && i->FailureKind == ovl_fail_bad_deduction)
       i->DeductionFailure.Destroy();
   }
+}
+
+void OverloadCandidateSet::clear() {
+  destroyCandidates();
   NumInlineSequences = 0;
   Candidates.clear();
   Functions.clear();
@@ -1668,7 +1678,7 @@ bool Sema::IsIntegralPromotion(Expr *From, QualType FromType, QualType ToType) {
     return To->getKind() == BuiltinType::UInt;
   }
 
-  // C++0x [conv.prom]p3:
+  // C++11 [conv.prom]p3:
   //   A prvalue of an unscoped enumeration type whose underlying type is not
   //   fixed (7.2) can be converted to an rvalue a prvalue of the first of the
   //   following types that can represent all the values of the enumeration
@@ -1680,12 +1690,26 @@ bool Sema::IsIntegralPromotion(Expr *From, QualType FromType, QualType ToType) {
   //   with lowest integer conversion rank (4.13) greater than the rank of long
   //   long in which all the values of the enumeration can be represented. If
   //   there are two such extended types, the signed one is chosen.
+  // C++11 [conv.prom]p4:
+  //   A prvalue of an unscoped enumeration type whose underlying type is fixed
+  //   can be converted to a prvalue of its underlying type. Moreover, if
+  //   integral promotion can be applied to its underlying type, a prvalue of an
+  //   unscoped enumeration type whose underlying type is fixed can also be
+  //   converted to a prvalue of the promoted underlying type.
   if (const EnumType *FromEnumType = FromType->getAs<EnumType>()) {
     // C++0x 7.2p9: Note that this implicit enum to int conversion is not
     // provided for a scoped enumeration.
     if (FromEnumType->getDecl()->isScoped())
       return false;
 
+    // We can perform an integral promotion to the underlying type of the enum,
+    // even if that's not the promoted type.
+    if (FromEnumType->getDecl()->isFixed()) {
+      QualType Underlying = FromEnumType->getDecl()->getIntegerType();
+      return Context.hasSameUnqualifiedType(Underlying, ToType) ||
+             IsIntegralPromotion(From, Underlying, ToType);
+    }
+
     // We have already pre-calculated the promotion type, so this is trivial.
     if (ToType->isIntegerType() &&
         !RequireCompleteType(From->getLocStart(), FromType, 0))
@@ -2899,8 +2923,6 @@ IsInitializerListConstructorConversion(Sema &S, Expr *From, QualType ToType,
   case OR_Success: {
     // Record the standard conversion we used and the conversion function.
     CXXConstructorDecl *Constructor = cast<CXXConstructorDecl>(Best->Function);
-    S.MarkFunctionReferenced(From->getLocStart(), Constructor);
-
     QualType ThisType = Constructor->getThisType(S.Context);
     // Initializer lists don't have conversions as such.
     User.Before.setAsIdentityConversion();
@@ -3081,8 +3103,6 @@ IsUserDefinedConversion(Sema &S, Expr *From, QualType ToType,
     // Record the standard conversion we used and the conversion function.
     if (CXXConstructorDecl *Constructor
           = dyn_cast<CXXConstructorDecl>(Best->Function)) {
-      S.MarkFunctionReferenced(From->getLocStart(), Constructor);
-
       // C++ [over.ics.user]p1:
       //   If the user-defined conversion is specified by a
       //   constructor (12.3.1), the initial standard conversion
@@ -3111,8 +3131,6 @@ IsUserDefinedConversion(Sema &S, Expr *From, QualType ToType,
     }
     if (CXXConversionDecl *Conversion
                  = dyn_cast<CXXConversionDecl>(Best->Function)) {
-      S.MarkFunctionReferenced(From->getLocStart(), Conversion);
-
       // C++ [over.ics.user]p1:
       //
       //   [...] If the user-defined conversion is specified by a
@@ -4025,8 +4043,6 @@ FindConversionForRefInit(Sema &S, ImplicitConversionSequence &ICS,
     if (!Best->FinalConversion.DirectBinding)
       return false;
 
-    if (Best->Function)
-      S.MarkFunctionReferenced(DeclLoc, Best->Function);
     ICS.setUserDefined();
     ICS.UserDefined.Before = Best->Conversions[0].Standard;
     ICS.UserDefined.After = Best->FinalConversion;
@@ -5531,7 +5547,7 @@ Sema::AddMethodTemplateCandidate(FunctionTemplateDecl *MethodTmpl,
   //   functions. In such a case, the candidate functions generated from each
   //   function template are combined with the set of non-template candidate
   //   functions.
-  TemplateDeductionInfo Info(Context, CandidateSet.getLocation());
+  TemplateDeductionInfo Info(CandidateSet.getLocation());
   FunctionDecl *Specialization = 0;
   if (TemplateDeductionResult Result
       = DeduceTemplateArguments(MethodTmpl, ExplicitTemplateArgs, Args,
@@ -5581,7 +5597,7 @@ Sema::AddTemplateOverloadCandidate(FunctionTemplateDecl *FunctionTemplate,
   //   functions. In such a case, the candidate functions generated from each
   //   function template are combined with the set of non-template candidate
   //   functions.
-  TemplateDeductionInfo Info(Context, CandidateSet.getLocation());
+  TemplateDeductionInfo Info(CandidateSet.getLocation());
   FunctionDecl *Specialization = 0;
   if (TemplateDeductionResult Result
         = DeduceTemplateArguments(FunctionTemplate, ExplicitTemplateArgs, Args,
@@ -5703,7 +5719,7 @@ Sema::AddConversionCandidate(CXXConversionDecl *Conversion,
   // there are 0 arguments (i.e., nothing is allocated using ASTContext's
   // allocator).
   QualType CallResultType = ConversionType.getNonLValueExprType(Context);
-  CallExpr Call(Context, &ConversionFn, 0, 0, CallResultType, VK,
+  CallExpr Call(Context, &ConversionFn, MultiExprArg(), CallResultType, VK,
                 From->getLocStart());
   ImplicitConversionSequence ICS =
     TryCopyInitialization(*this, &Call, ToType,
@@ -5765,7 +5781,7 @@ Sema::AddTemplateConversionCandidate(FunctionTemplateDecl *FunctionTemplate,
   if (!CandidateSet.isNewCandidate(FunctionTemplate))
     return;
 
-  TemplateDeductionInfo Info(Context, CandidateSet.getLocation());
+  TemplateDeductionInfo Info(CandidateSet.getLocation());
   CXXConversionDecl *Specialization = 0;
   if (TemplateDeductionResult Result
         = DeduceTemplateArguments(FunctionTemplate, ToType,
@@ -6770,17 +6786,16 @@ public:
   //        bool       operator==(T, T);
   //        bool       operator!=(T, T);
   void addRelationalPointerOrEnumeralOverloads() {
-    // C++ [over.built]p1:
-    //   If there is a user-written candidate with the same name and parameter
-    //   types as a built-in candidate operator function, the built-in operator
-    //   function is hidden and is not included in the set of candidate
-    //   functions.
+    // C++ [over.match.oper]p3:
+    //   [...]the built-in candidates include all of the candidate operator
+    //   functions defined in 13.6 that, compared to the given operator, [...]
+    //   do not have the same parameter-type-list as any non-template non-member
+    //   candidate.
     //
-    // The text is actually in a note, but if we don't implement it then we end
-    // up with ambiguities when the user provides an overloaded operator for
-    // an enumeration type. Note that only enumeration types have this problem,
-    // so we track which enumeration types we've seen operators for. Also, the
-    // only other overloaded operator with enumeration argumenst, operator=,
+    // Note that in practice, this only affects enumeration types because there
+    // aren't any built-in candidates of record type, and a user-defined operator
+    // must have an operand of record or enumeration type. Also, the only other
+    // overloaded operator with enumeration arguments, operator=,
     // cannot be overloaded for enumeration types, so this is the only place
     // where we must suppress candidates like this.
     llvm::DenseSet<std::pair<CanQualType, CanQualType> >
@@ -6795,6 +6810,9 @@ public:
           if (!C->Viable || !C->Function || C->Function->getNumParams() != 2)
             continue;
 
+          if (C->Function->isFunctionTemplateSpecialization())
+            continue;
+
           QualType FirstParamType =
             C->Function->getParamDecl(0)->getType().getUnqualifiedType();
           QualType SecondParamType =
@@ -7652,8 +7670,7 @@ Sema::AddArgumentDependentLookupCandidates(DeclarationName Name,
                                            llvm::ArrayRef<Expr *> Args,
                                  TemplateArgumentListInfo *ExplicitTemplateArgs,
                                            OverloadCandidateSet& CandidateSet,
-                                           bool PartialOverloading,
-                                           bool StdNamespaceIsAssociated) {
+                                           bool PartialOverloading) {
   ADLResult Fns;
 
   // FIXME: This approach for uniquing ADL results (and removing
@@ -7664,8 +7681,7 @@ Sema::AddArgumentDependentLookupCandidates(DeclarationName Name,
   // we supposed to consider on ADL candidates, anyway?
 
   // FIXME: Pass in the explicit template arguments?
-  ArgumentDependentLookup(Name, Operator, Loc, Args, Fns,
-                          StdNamespaceIsAssociated);
+  ArgumentDependentLookup(Name, Operator, Loc, Args, Fns);
 
   // Erase all of the candidates we already knew about.
   for (OverloadCandidateSet::iterator Cand = CandidateSet.begin(),
@@ -7976,10 +7992,20 @@ void ImplicitConversionSequence::DiagnoseAmbiguousConversion(
                                  const PartialDiagnostic &PDiag) const {
   S.Diag(CaretLoc, PDiag)
     << Ambiguous.getFromType() << Ambiguous.getToType();
-  for (AmbiguousConversionSequence::const_iterator
-         I = Ambiguous.begin(), E = Ambiguous.end(); I != E; ++I) {
+  // FIXME: The note limiting machinery is borrowed from
+  // OverloadCandidateSet::NoteCandidates; there's an opportunity for
+  // refactoring here.
+  const OverloadsShown ShowOverloads = S.Diags.getShowOverloads();
+  unsigned CandsShown = 0;
+  AmbiguousConversionSequence::const_iterator I, E;
+  for (I = Ambiguous.begin(), E = Ambiguous.end(); I != E; ++I) {
+    if (CandsShown >= 4 && ShowOverloads == Ovl_Best)
+      break;
+    ++CandsShown;
     S.NoteOverloadCandidate(*I);
   }
+  if (I != E)
+    S.Diag(SourceLocation(), diag::note_ovl_too_many_candidates) << int(E - I);
 }
 
 namespace {
@@ -8515,7 +8541,7 @@ void NoteSurrogateCandidate(Sema &S, OverloadCandidate *Cand) {
 }
 
 void NoteBuiltinOperatorCandidate(Sema &S,
-                                  const char *Opc,
+                                  StringRef Opc,
                                   SourceLocation OpLoc,
                                   OverloadCandidate *Cand) {
   assert(Cand->NumConversions <= 2 && "builtin operator is not binary");
@@ -8561,6 +8587,7 @@ RankDeductionFailure(const OverloadCandidate::DeductionFailureInfo &DFI) {
   case Sema::TDK_Success:
     llvm_unreachable("TDK_success while diagnosing bad deduction");
 
+  case Sema::TDK_Invalid:
   case Sema::TDK_Incomplete:
     return 1;
 
@@ -8783,7 +8810,7 @@ void CompleteNonViableCandidate(Sema &S, OverloadCandidate *Cand,
 void OverloadCandidateSet::NoteCandidates(Sema &S,
                                           OverloadCandidateDisplayKind OCD,
                                           llvm::ArrayRef<Expr *> Args,
-                                          const char *Opc,
+                                          StringRef Opc,
                                           SourceLocation OpLoc) {
   // Sort the candidates by viability and position.  Sorting directly would
   // be prohibitive, so we make a set of pointers and sort those.
@@ -8807,8 +8834,7 @@ void OverloadCandidateSet::NoteCandidates(Sema &S,
   bool ReportedAmbiguousConversions = false;
 
   SmallVectorImpl<OverloadCandidate*>::iterator I, E;
-  const DiagnosticsEngine::OverloadsShown ShowOverloads = 
-      S.Diags.getShowOverloads();
+  const OverloadsShown ShowOverloads = S.Diags.getShowOverloads();
   unsigned CandsShown = 0;
   for (I = Cands.begin(), E = Cands.end(); I != E; ++I) {
     OverloadCandidate *Cand = *I;
@@ -8816,7 +8842,7 @@ void OverloadCandidateSet::NoteCandidates(Sema &S,
     // Set an arbitrary limit on the number of candidate functions we'll spam
     // the user with.  FIXME: This limit should depend on details of the
     // candidate list.
-    if (CandsShown >= 4 && ShowOverloads == DiagnosticsEngine::Ovl_Best) {
+    if (CandsShown >= 4 && ShowOverloads == Ovl_Best) {
       break;
     }
     ++CandsShown;
@@ -8979,7 +9005,7 @@ private:
     //   function template specialization, which is added to the set of
     //   overloaded functions considered.
     FunctionDecl *Specialization = 0;
-    TemplateDeductionInfo Info(Context, OvlExpr->getNameLoc());
+    TemplateDeductionInfo Info(OvlExpr->getNameLoc());
     if (Sema::TemplateDeductionResult Result
           = S.DeduceTemplateArguments(FunctionTemplate, 
                                       &OvlExplicitTemplateArgs,
@@ -9201,7 +9227,6 @@ Sema::ResolveAddressOfOverloadedFunction(Expr *AddressOfExpr,
     Fn = Resolver.getMatchingFunctionDecl();
     assert(Fn);
     FoundResult = *Resolver.getMatchingFunctionAccessPair();
-    MarkFunctionReferenced(AddressOfExpr->getLocStart(), Fn);
     if (Complain)
       CheckAddressOfMemberAccess(AddressOfExpr, FoundResult);
   }
@@ -9257,7 +9282,7 @@ Sema::ResolveSingleFunctionTemplateSpecialization(OverloadExpr *ovl,
     //   function template specialization, which is added to the set of
     //   overloaded functions considered.
     FunctionDecl *Specialization = 0;
-    TemplateDeductionInfo Info(Context, ovl->getNameLoc());
+    TemplateDeductionInfo Info(ovl->getNameLoc());
     if (TemplateDeductionResult Result
           = DeduceTemplateArguments(FunctionTemplate, &ExplicitTemplateArgs,
                                     Specialization, Info)) {
@@ -9457,8 +9482,7 @@ void Sema::AddOverloadedCallCandidates(UnresolvedLookupExpr *ULE,
     AddArgumentDependentLookupCandidates(ULE->getName(), /*Operator*/ false,
                                          ULE->getExprLoc(),
                                          Args, ExplicitTemplateArgs,
-                                         CandidateSet, PartialOverloading,
-                                         ULE->isStdAssociatedNamespace());
+                                         CandidateSet, PartialOverloading);
 }
 
 /// Attempt to recover from an ill-formed use of a non-dependent name in a
@@ -9509,7 +9533,7 @@ DiagnoseTwoPhaseLookup(Sema &SemaRef, SourceLocation FnLoc,
       // declaring the function there instead.
       Sema::AssociatedNamespaceSet AssociatedNamespaces;
       Sema::AssociatedClassSet AssociatedClasses;
-      SemaRef.FindAssociatedClassesAndNamespaces(Args,
+      SemaRef.FindAssociatedClassesAndNamespaces(FnLoc, Args,
                                                  AssociatedNamespaces,
                                                  AssociatedClasses);
       // Never suggest declaring a function within namespace 'std'. 
@@ -9632,6 +9656,20 @@ class NoTypoCorrectionCCC : public CorrectionCandidateCallback {
     return false;
   }
 };
+
+class BuildRecoveryCallExprRAII {
+  Sema &SemaRef;
+public:
+  BuildRecoveryCallExprRAII(Sema &S) : SemaRef(S) {
+    assert(SemaRef.IsBuildingRecoveryCallExpr == false);
+    SemaRef.IsBuildingRecoveryCallExpr = true;
+  }
+
+  ~BuildRecoveryCallExprRAII() {
+    SemaRef.IsBuildingRecoveryCallExpr = false;
+  }
+};
+
 }
 
 /// Attempts to recover from a call where no functions were found.
@@ -9644,6 +9682,15 @@ BuildRecoveryCallExpr(Sema &SemaRef, Scope *S, Expr *Fn,
                       llvm::MutableArrayRef<Expr *> Args,
                       SourceLocation RParenLoc,
                       bool EmptyLookup, bool AllowTypoCorrection) {
+  // Do not try to recover if it is already building a recovery call.
+  // This stops infinite loops for template instantiations like
+  //
+  // template <typename T> auto foo(T t) -> decltype(foo(t)) {}
+  // template <typename T> auto foo(T t) -> decltype(foo(&t)) {}
+  //
+  if (SemaRef.IsBuildingRecoveryCallExpr)
+    return ExprError();
+  BuildRecoveryCallExprRAII RCE(SemaRef);
 
   CXXScopeSpec SS;
   SS.Adopt(ULE->getQualifierLoc());
@@ -9695,20 +9742,15 @@ BuildRecoveryCallExpr(Sema &SemaRef, Scope *S, Expr *Fn,
                                RParenLoc);
 }
 
-/// ResolveOverloadedCallFn - Given the call expression that calls Fn
-/// (which eventually refers to the declaration Func) and the call
-/// arguments Args/NumArgs, attempt to resolve the function call down
-/// to a specific function. If overload resolution succeeds, returns
-/// the function declaration produced by overload
-/// resolution. Otherwise, emits diagnostics, deletes all of the
-/// arguments and Fn, and returns NULL.
-ExprResult
-Sema::BuildOverloadedCallExpr(Scope *S, Expr *Fn, UnresolvedLookupExpr *ULE,
-                              SourceLocation LParenLoc,
-                              Expr **Args, unsigned NumArgs,
-                              SourceLocation RParenLoc,
-                              Expr *ExecConfig,
-                              bool AllowTypoCorrection) {
+/// \brief Constructs and populates an OverloadedCandidateSet from
+/// the given function.
+/// \returns true when an the ExprResult output parameter has been set.
+bool Sema::buildOverloadedCallSet(Scope *S, Expr *Fn,
+                                  UnresolvedLookupExpr *ULE,
+                                  Expr **Args, unsigned NumArgs,
+                                  SourceLocation RParenLoc,
+                                  OverloadCandidateSet *CandidateSet,
+                                  ExprResult *Result) {
 #ifndef NDEBUG
   if (ULE->requiresADL()) {
     // To do ADL, we must have found an unqualified name.
@@ -9724,62 +9766,79 @@ Sema::BuildOverloadedCallExpr(Scope *S, Expr *Fn, UnresolvedLookupExpr *ULE,
 
     // We don't perform ADL in C.
     assert(getLangOpts().CPlusPlus && "ADL enabled in C");
-  } else
-    assert(!ULE->isStdAssociatedNamespace() &&
-           "std is associated namespace but not doing ADL");
+  }
 #endif
 
   UnbridgedCastsSet UnbridgedCasts;
-  if (checkArgPlaceholdersForOverload(*this, Args, NumArgs, UnbridgedCasts))
-    return ExprError();
-
-  OverloadCandidateSet CandidateSet(Fn->getExprLoc());
+  if (checkArgPlaceholdersForOverload(*this, Args, NumArgs, UnbridgedCasts)) {
+    *Result = ExprError();
+    return true;
+  }
 
   // Add the functions denoted by the callee to the set of candidate
   // functions, including those from argument-dependent lookup.
   AddOverloadedCallCandidates(ULE, llvm::makeArrayRef(Args, NumArgs),
-                              CandidateSet);
+                              *CandidateSet);
 
   // If we found nothing, try to recover.
   // BuildRecoveryCallExpr diagnoses the error itself, so we just bail
   // out if it fails.
-  if (CandidateSet.empty()) {
+  if (CandidateSet->empty()) {
     // In Microsoft mode, if we are inside a template class member function then
     // create a type dependent CallExpr. The goal is to postpone name lookup
     // to instantiation time to be able to search into type dependent base
     // classes.
     if (getLangOpts().MicrosoftMode && CurContext->isDependentContext() && 
         (isa<FunctionDecl>(CurContext) || isa<CXXRecordDecl>(CurContext))) {
-      CallExpr *CE = new (Context) CallExpr(Context, Fn, Args, NumArgs,
-                                          Context.DependentTy, VK_RValue,
-                                          RParenLoc);
+      CallExpr *CE = new (Context) CallExpr(Context, Fn,
+                                            llvm::makeArrayRef(Args, NumArgs),
+                                            Context.DependentTy, VK_RValue,
+                                            RParenLoc);
       CE->setTypeDependent(true);
-      return Owned(CE);
+      *Result = Owned(CE);
+      return true;
     }
-    return BuildRecoveryCallExpr(*this, S, Fn, ULE, LParenLoc,
-                                 llvm::MutableArrayRef<Expr *>(Args, NumArgs),
-                                 RParenLoc, /*EmptyLookup=*/true,
-                                 AllowTypoCorrection);
+    return false;
   }
 
   UnbridgedCasts.restore();
+  return false;
+}
 
-  OverloadCandidateSet::iterator Best;
-  switch (CandidateSet.BestViableFunction(*this, Fn->getLocStart(), Best)) {
+/// FinishOverloadedCallExpr - given an OverloadCandidateSet, builds and returns
+/// the completed call expression. If overload resolution fails, emits
+/// diagnostics and returns ExprError()
+static ExprResult FinishOverloadedCallExpr(Sema &SemaRef, Scope *S, Expr *Fn,
+                                           UnresolvedLookupExpr *ULE,
+                                           SourceLocation LParenLoc,
+                                           Expr **Args, unsigned NumArgs,
+                                           SourceLocation RParenLoc,
+                                           Expr *ExecConfig,
+                                           OverloadCandidateSet *CandidateSet,
+                                           OverloadCandidateSet::iterator *Best,
+                                           OverloadingResult OverloadResult,
+                                           bool AllowTypoCorrection) {
+  if (CandidateSet->empty())
+    return BuildRecoveryCallExpr(SemaRef, S, Fn, ULE, LParenLoc,
+                                 llvm::MutableArrayRef<Expr *>(Args, NumArgs),
+                                 RParenLoc, /*EmptyLookup=*/true,
+                                 AllowTypoCorrection);
+
+  switch (OverloadResult) {
   case OR_Success: {
-    FunctionDecl *FDecl = Best->Function;
-    MarkFunctionReferenced(Fn->getExprLoc(), FDecl);
-    CheckUnresolvedLookupAccess(ULE, Best->FoundDecl);
-    DiagnoseUseOfDecl(FDecl, ULE->getNameLoc());
-    Fn = FixOverloadedFunctionReference(Fn, Best->FoundDecl, FDecl);
-    return BuildResolvedCallExpr(Fn, FDecl, LParenLoc, Args, NumArgs, RParenLoc,
-                                 ExecConfig);
+    FunctionDecl *FDecl = (*Best)->Function;
+    SemaRef.MarkFunctionReferenced(Fn->getExprLoc(), FDecl);
+    SemaRef.CheckUnresolvedLookupAccess(ULE, (*Best)->FoundDecl);
+    SemaRef.DiagnoseUseOfDecl(FDecl, ULE->getNameLoc());
+    Fn = SemaRef.FixOverloadedFunctionReference(Fn, (*Best)->FoundDecl, FDecl);
+    return SemaRef.BuildResolvedCallExpr(Fn, FDecl, LParenLoc, Args, NumArgs,
+                                         RParenLoc, ExecConfig);
   }
 
   case OR_No_Viable_Function: {
     // Try to recover by looking for viable functions which the user might
     // have meant to call.
-    ExprResult Recovery = BuildRecoveryCallExpr(*this, S, Fn, ULE, LParenLoc,
+    ExprResult Recovery = BuildRecoveryCallExpr(SemaRef, S, Fn, ULE, LParenLoc,
                                   llvm::MutableArrayRef<Expr *>(Args, NumArgs),
                                                 RParenLoc,
                                                 /*EmptyLookup=*/false,
@@ -9787,44 +9846,73 @@ Sema::BuildOverloadedCallExpr(Scope *S, Expr *Fn, UnresolvedLookupExpr *ULE,
     if (!Recovery.isInvalid())
       return Recovery;
 
-    Diag(Fn->getLocStart(),
+    SemaRef.Diag(Fn->getLocStart(),
          diag::err_ovl_no_viable_function_in_call)
       << ULE->getName() << Fn->getSourceRange();
-    CandidateSet.NoteCandidates(*this, OCD_AllCandidates,
-                                llvm::makeArrayRef(Args, NumArgs));
+    CandidateSet->NoteCandidates(SemaRef, OCD_AllCandidates,
+                                 llvm::makeArrayRef(Args, NumArgs));
     break;
   }
 
   case OR_Ambiguous:
-    Diag(Fn->getLocStart(), diag::err_ovl_ambiguous_call)
+    SemaRef.Diag(Fn->getLocStart(), diag::err_ovl_ambiguous_call)
       << ULE->getName() << Fn->getSourceRange();
-    CandidateSet.NoteCandidates(*this, OCD_ViableCandidates,
-                                llvm::makeArrayRef(Args, NumArgs));
+    CandidateSet->NoteCandidates(SemaRef, OCD_ViableCandidates,
+                                 llvm::makeArrayRef(Args, NumArgs));
     break;
 
-  case OR_Deleted:
-    {
-      Diag(Fn->getLocStart(), diag::err_ovl_deleted_call)
-        << Best->Function->isDeleted()
-        << ULE->getName()
-        << getDeletedOrUnavailableSuffix(Best->Function)
-        << Fn->getSourceRange();
-      CandidateSet.NoteCandidates(*this, OCD_AllCandidates,
-                                  llvm::makeArrayRef(Args, NumArgs));
+  case OR_Deleted: {
+    SemaRef.Diag(Fn->getLocStart(), diag::err_ovl_deleted_call)
+      << (*Best)->Function->isDeleted()
+      << ULE->getName()
+      << SemaRef.getDeletedOrUnavailableSuffix((*Best)->Function)
+      << Fn->getSourceRange();
+    CandidateSet->NoteCandidates(SemaRef, OCD_AllCandidates,
+                                 llvm::makeArrayRef(Args, NumArgs));
 
-      // We emitted an error for the unvailable/deleted function call but keep
-      // the call in the AST.
-      FunctionDecl *FDecl = Best->Function;
-      Fn = FixOverloadedFunctionReference(Fn, Best->FoundDecl, FDecl);
-      return BuildResolvedCallExpr(Fn, FDecl, LParenLoc, Args, NumArgs,
-                                   RParenLoc, ExecConfig);
-    }
+    // We emitted an error for the unvailable/deleted function call but keep
+    // the call in the AST.
+    FunctionDecl *FDecl = (*Best)->Function;
+    Fn = SemaRef.FixOverloadedFunctionReference(Fn, (*Best)->FoundDecl, FDecl);
+    return SemaRef.BuildResolvedCallExpr(Fn, FDecl, LParenLoc, Args, NumArgs,
+                                 RParenLoc, ExecConfig);
+  }
   }
 
   // Overload resolution failed.
   return ExprError();
 }
 
+/// BuildOverloadedCallExpr - Given the call expression that calls Fn
+/// (which eventually refers to the declaration Func) and the call
+/// arguments Args/NumArgs, attempt to resolve the function call down
+/// to a specific function. If overload resolution succeeds, returns
+/// the call expression produced by overload resolution.
+/// Otherwise, emits diagnostics and returns ExprError.
+ExprResult Sema::BuildOverloadedCallExpr(Scope *S, Expr *Fn,
+                                         UnresolvedLookupExpr *ULE,
+                                         SourceLocation LParenLoc,
+                                         Expr **Args, unsigned NumArgs,
+                                         SourceLocation RParenLoc,
+                                         Expr *ExecConfig,
+                                         bool AllowTypoCorrection) {
+  OverloadCandidateSet CandidateSet(Fn->getExprLoc());
+  ExprResult result;
+
+  if (buildOverloadedCallSet(S, Fn, ULE, Args, NumArgs, LParenLoc,
+                             &CandidateSet, &result))
+    return result;
+
+  OverloadCandidateSet::iterator Best;
+  OverloadingResult OverloadResult =
+      CandidateSet.BestViableFunction(*this, Fn->getLocStart(), Best);
+
+  return FinishOverloadedCallExpr(*this, S, Fn, ULE, LParenLoc, Args, NumArgs,
+                                  RParenLoc, ExecConfig, &CandidateSet,
+                                  &Best, OverloadResult,
+                                  AllowTypoCorrection);
+}
+
 static bool IsOverloaded(const UnresolvedSetImpl &Functions) {
   return Functions.size() > 1 ||
     (Functions.size() == 1 && isa<FunctionTemplateDecl>(*Functions.begin()));
@@ -9889,10 +9977,10 @@ Sema::CreateOverloadedUnaryOp(SourceLocation OpLoc, unsigned OpcIn,
                                      /*ADL*/ true, IsOverloaded(Fns),
                                      Fns.begin(), Fns.end());
     return Owned(new (Context) CXXOperatorCallExpr(Context, Op, Fn,
-                                                  &Args[0], NumArgs,
+                                              llvm::makeArrayRef(Args, NumArgs),
                                                    Context.DependentTy,
                                                    VK_RValue,
-                                                   OpLoc));
+                                                   OpLoc, false));
   }
 
   // Build an empty overload set.
@@ -9968,7 +10056,8 @@ Sema::CreateOverloadedUnaryOp(SourceLocation OpLoc, unsigned OpcIn,
       Args[0] = Input;
       CallExpr *TheCall =
         new (Context) CXXOperatorCallExpr(Context, Op, FnExpr.take(),
-                                          Args, NumArgs, ResultTy, VK, OpLoc);
+                                          llvm::makeArrayRef(Args, NumArgs),
+                                          ResultTy, VK, OpLoc, false);
 
       if (CheckCallReturnType(FnDecl->getResultType(), OpLoc, TheCall,
                               FnDecl))
@@ -10069,7 +10158,8 @@ Sema::CreateOverloadedBinOp(SourceLocation OpLoc,
         return Owned(new (Context) BinaryOperator(Args[0], Args[1], Opc,
                                                   Context.DependentTy,
                                                   VK_RValue, OK_Ordinary,
-                                                  OpLoc));
+                                                  OpLoc,
+                                                  FPFeatures.fp_contract));
 
       return Owned(new (Context) CompoundAssignOperator(Args[0], Args[1], Opc,
                                                         Context.DependentTy,
@@ -10077,7 +10167,8 @@ Sema::CreateOverloadedBinOp(SourceLocation OpLoc,
                                                         OK_Ordinary,
                                                         Context.DependentTy,
                                                         Context.DependentTy,
-                                                        OpLoc));
+                                                        OpLoc,
+                                                        FPFeatures.fp_contract));
     }
 
     // FIXME: save results of ADL from here?
@@ -10089,11 +10180,9 @@ Sema::CreateOverloadedBinOp(SourceLocation OpLoc,
                                      NestedNameSpecifierLoc(), OpNameInfo, 
                                      /*ADL*/ true, IsOverloaded(Fns),
                                      Fns.begin(), Fns.end());
-    return Owned(new (Context) CXXOperatorCallExpr(Context, Op, Fn,
-                                                   Args, 2,
-                                                   Context.DependentTy,
-                                                   VK_RValue,
-                                                   OpLoc));
+    return Owned(new (Context) CXXOperatorCallExpr(Context, Op, Fn, Args,
+                                                Context.DependentTy, VK_RValue,
+                                                OpLoc, FPFeatures.fp_contract));
   }
 
   // Always do placeholder-like conversions on the RHS.
@@ -10208,7 +10297,8 @@ Sema::CreateOverloadedBinOp(SourceLocation OpLoc,
 
         CXXOperatorCallExpr *TheCall =
           new (Context) CXXOperatorCallExpr(Context, Op, FnExpr.take(),
-                                            Args, 2, ResultTy, VK, OpLoc);
+                                            Args, ResultTy, VK, OpLoc,
+                                            FPFeatures.fp_contract);
 
         if (CheckCallReturnType(FnDecl->getResultType(), OpLoc, TheCall,
                                 FnDecl))
@@ -10270,7 +10360,7 @@ Sema::CreateOverloadedBinOp(SourceLocation OpLoc,
       if (Result.isInvalid())
         CandidateSet.NoteCandidates(*this, OCD_AllCandidates, Args,
                                     BinaryOperator::getOpcodeStr(Opc), OpLoc);
-      return move(Result);
+      return Result;
     }
 
     case OR_Ambiguous:
@@ -10337,10 +10427,10 @@ Sema::CreateOverloadedArraySubscriptExpr(SourceLocation LLoc,
     // Can't add any actual overloads yet
 
     return Owned(new (Context) CXXOperatorCallExpr(Context, OO_Subscript, Fn,
-                                                   Args, 2,
+                                                   Args,
                                                    Context.DependentTy,
                                                    VK_RValue,
-                                                   RLoc));
+                                                   RLoc, false));
   }
 
   // Handle placeholders on both operands.
@@ -10416,8 +10506,9 @@ Sema::CreateOverloadedArraySubscriptExpr(SourceLocation LLoc,
 
         CXXOperatorCallExpr *TheCall =
           new (Context) CXXOperatorCallExpr(Context, OO_Subscript,
-                                            FnExpr.take(), Args, 2,
-                                            ResultTy, VK, RLoc);
+                                            FnExpr.take(), Args,
+                                            ResultTy, VK, RLoc,
+                                            false);
 
         if (CheckCallReturnType(FnDecl->getResultType(), LLoc, TheCall,
                                 FnDecl))
@@ -10534,7 +10625,8 @@ Sema::BuildCallToMemberFunction(Scope *S, Expr *MemExprE,
     }
               
     CXXMemberCallExpr *call
-      = new (Context) CXXMemberCallExpr(Context, MemExprE, Args, NumArgs,
+      = new (Context) CXXMemberCallExpr(Context, MemExprE,
+                                        llvm::makeArrayRef(Args, NumArgs),
                                         resultType, valueKind, RParenLoc);
 
     if (CheckCallReturnType(proto->getResultType(),
@@ -10676,7 +10768,8 @@ Sema::BuildCallToMemberFunction(Scope *S, Expr *MemExprE,
 
   assert(Method && "Member call to something that isn't a method?");
   CXXMemberCallExpr *TheCall =
-    new (Context) CXXMemberCallExpr(Context, MemExprE, Args, NumArgs,
+    new (Context) CXXMemberCallExpr(Context, MemExprE,
+                                    llvm::makeArrayRef(Args, NumArgs),
                                     ResultType, VK, RParenLoc);
 
   // Check for a valid return type.
@@ -10904,6 +10997,11 @@ Sema::BuildCallToObjectOfClassType(Scope *S, Expr *Obj,
   // that calls this method, using Object for the implicit object
   // parameter and passing along the remaining arguments.
   CXXMethodDecl *Method = cast<CXXMethodDecl>(Best->Function);
+
+  // An error diagnostic has already been printed when parsing the declaration.
+  if (Method->isInvalidDecl())
+    return ExprError();
+
   const FunctionProtoType *Proto =
     Method->getType()->getAs<FunctionProtoType>();
 
@@ -10942,8 +11040,8 @@ Sema::BuildCallToObjectOfClassType(Scope *S, Expr *Obj,
 
   CXXOperatorCallExpr *TheCall =
     new (Context) CXXOperatorCallExpr(Context, OO_Call, NewFn.take(),
-                                      MethodArgs, NumArgs + 1,
-                                      ResultTy, VK, RParenLoc);
+                                      llvm::makeArrayRef(MethodArgs, NumArgs+1),
+                                      ResultTy, VK, RParenLoc, false);
   delete [] MethodArgs;
 
   if (CheckCallReturnType(Method->getResultType(), LParenLoc, TheCall,
@@ -10966,7 +11064,7 @@ Sema::BuildCallToObjectOfClassType(Scope *S, Expr *Obj,
   if (ObjRes.isInvalid())
     IsError = true;
   else
-    Object = move(ObjRes);
+    Object = ObjRes;
   TheCall->setArg(0, Object.take());
 
   // Check the argument types.
@@ -11116,7 +11214,7 @@ Sema::BuildOverloadedArrowExpr(Scope *S, Expr *Base, SourceLocation OpLoc) {
   ResultTy = ResultTy.getNonLValueExprType(Context);
   CXXOperatorCallExpr *TheCall =
     new (Context) CXXOperatorCallExpr(Context, OO_Arrow, FnExpr.take(),
-                                      &Base, 1, ResultTy, VK, OpLoc);
+                                      Base, ResultTy, VK, OpLoc, false);
 
   if (CheckCallReturnType(Method->getResultType(), OpLoc, TheCall,
                           Method))
@@ -11187,7 +11285,8 @@ ExprResult Sema::BuildLiteralOperatorCall(LookupResult &R,
   ResultTy = ResultTy.getNonLValueExprType(Context);
 
   UserDefinedLiteral *UDL =
-    new (Context) UserDefinedLiteral(Context, Fn.take(), ConvArgs, Args.size(),
+    new (Context) UserDefinedLiteral(Context, Fn.take(),
+                                     llvm::makeArrayRef(ConvArgs, Args.size()),
                                      ResultTy, VK, LitEndLoc, UDSuffixLoc);
 
   if (CheckCallReturnType(FD->getResultType(), UDSuffixLoc, UDL, FD))
@@ -11199,6 +11298,80 @@ ExprResult Sema::BuildLiteralOperatorCall(LookupResult &R,
   return MaybeBindToTemporary(UDL);
 }
 
+/// Build a call to 'begin' or 'end' for a C++11 for-range statement. If the
+/// given LookupResult is non-empty, it is assumed to describe a member which
+/// will be invoked. Otherwise, the function will be found via argument
+/// dependent lookup.
+/// CallExpr is set to a valid expression and FRS_Success returned on success,
+/// otherwise CallExpr is set to ExprError() and some non-success value
+/// is returned.
+Sema::ForRangeStatus
+Sema::BuildForRangeBeginEndCall(Scope *S, SourceLocation Loc,
+                                SourceLocation RangeLoc, VarDecl *Decl,
+                                BeginEndFunction BEF,
+                                const DeclarationNameInfo &NameInfo,
+                                LookupResult &MemberLookup,
+                                OverloadCandidateSet *CandidateSet,
+                                Expr *Range, ExprResult *CallExpr) {
+  CandidateSet->clear();
+  if (!MemberLookup.empty()) {
+    ExprResult MemberRef =
+        BuildMemberReferenceExpr(Range, Range->getType(), Loc,
+                                 /*IsPtr=*/false, CXXScopeSpec(),
+                                 /*TemplateKWLoc=*/SourceLocation(),
+                                 /*FirstQualifierInScope=*/0,
+                                 MemberLookup,
+                                 /*TemplateArgs=*/0);
+    if (MemberRef.isInvalid()) {
+      *CallExpr = ExprError();
+      Diag(Range->getLocStart(), diag::note_in_for_range)
+          << RangeLoc << BEF << Range->getType();
+      return FRS_DiagnosticIssued;
+    }
+    *CallExpr = ActOnCallExpr(S, MemberRef.get(), Loc, MultiExprArg(), Loc, 0);
+    if (CallExpr->isInvalid()) {
+      *CallExpr = ExprError();
+      Diag(Range->getLocStart(), diag::note_in_for_range)
+          << RangeLoc << BEF << Range->getType();
+      return FRS_DiagnosticIssued;
+    }
+  } else {
+    UnresolvedSet<0> FoundNames;
+    UnresolvedLookupExpr *Fn =
+      UnresolvedLookupExpr::Create(Context, /*NamingClass=*/0,
+                                   NestedNameSpecifierLoc(), NameInfo,
+                                   /*NeedsADL=*/true, /*Overloaded=*/false,
+                                   FoundNames.begin(), FoundNames.end());
+
+    bool CandidateSetError = buildOverloadedCallSet(S, Fn, Fn, &Range, 1, Loc,
+                                                    CandidateSet, CallExpr);
+    if (CandidateSet->empty() || CandidateSetError) {
+      *CallExpr = ExprError();
+      return FRS_NoViableFunction;
+    }
+    OverloadCandidateSet::iterator Best;
+    OverloadingResult OverloadResult =
+        CandidateSet->BestViableFunction(*this, Fn->getLocStart(), Best);
+
+    if (OverloadResult == OR_No_Viable_Function) {
+      *CallExpr = ExprError();
+      return FRS_NoViableFunction;
+    }
+    *CallExpr = FinishOverloadedCallExpr(*this, S, Fn, Fn, Loc, &Range, 1,
+                                         Loc, 0, CandidateSet, &Best,
+                                         OverloadResult,
+                                         /*AllowTypoCorrection=*/false);
+    if (CallExpr->isInvalid() || OverloadResult != OR_Success) {
+      *CallExpr = ExprError();
+      Diag(Range->getLocStart(), diag::note_in_for_range)
+          << RangeLoc << BEF << Range->getType();
+      return FRS_DiagnosticIssued;
+    }
+  }
+  return FRS_Success;
+}
+
+
 /// FixOverloadedFunctionReference - E is an expression that refers to
 /// a C++ overloaded function (possibly with some parentheses and
 /// perhaps a '&' around it). We have resolved the overloaded function
@@ -11358,6 +11531,7 @@ Expr *Sema::FixOverloadedFunctionReference(Expr *E, DeclAccessPair Found,
                                         TemplateArgs,
                                         type, valueKind, OK_Ordinary);
     ME->setHadMultipleCandidates(true);
+    MarkMemberReferenced(ME);
     return ME;
   }
 
diff --git a/lib/Sema/SemaPseudoObject.cpp b/lib/Sema/SemaPseudoObject.cpp
index 722ac19be533..a8d75b290f19 100644
--- a/lib/Sema/SemaPseudoObject.cpp
+++ b/lib/Sema/SemaPseudoObject.cpp
@@ -31,6 +31,7 @@
 //===----------------------------------------------------------------------===//
 
 #include "clang/Sema/SemaInternal.h"
+#include "clang/Sema/ScopeInfo.h"
 #include "clang/Sema/Initialization.h"
 #include "clang/AST/ExprObjC.h"
 #include "clang/Lex/Preprocessor.h"
@@ -91,9 +92,8 @@ namespace {
         return new (S.Context) GenericSelectionExpr(S.Context,
                                                     gse->getGenericLoc(),
                                                     gse->getControllingExpr(),
-                                                    assocTypes.data(),
-                                                    assocs.data(),
-                                                    numAssocs,
+                                                    assocTypes,
+                                                    assocs,
                                                     gse->getDefaultLoc(),
                                                     gse->getRParenLoc(),
                                       gse->containsUnexpandedParameterPack(),
@@ -187,7 +187,7 @@ namespace {
                                     UnaryOperatorKind opcode,
                                     Expr *op);
 
-    ExprResult complete(Expr *syntacticForm);
+    virtual ExprResult complete(Expr *syntacticForm);
 
     OpaqueValueExpr *capture(Expr *op);
     OpaqueValueExpr *captureValueAsResult(Expr *op);
@@ -198,7 +198,14 @@ namespace {
     }
 
     /// Return true if assignments have a non-void result.
-    virtual bool assignmentsHaveResult() { return true; }
+    bool CanCaptureValueOfType(QualType ty) {
+      assert(!ty->isIncompleteType());
+      assert(!ty->isDependentType());
+
+      if (const CXXRecordDecl *ClassDecl = ty->getAsCXXRecordDecl())
+        return ClassDecl->isTriviallyCopyable();
+      return true;
+    }
 
     virtual Expr *rebuildAndCaptureObject(Expr *) = 0;
     virtual ExprResult buildGet() = 0;
@@ -206,7 +213,7 @@ namespace {
                                 bool captureSetValueAsResult) = 0;
   };
 
-  /// A PseudoOpBuilder for Objective-C @properties.
+  /// A PseudoOpBuilder for Objective-C \@properties.
   class ObjCPropertyOpBuilder : public PseudoOpBuilder {
     ObjCPropertyRefExpr *RefExpr;
     ObjCPropertyRefExpr *SyntacticRefExpr;
@@ -239,6 +246,9 @@ namespace {
     Expr *rebuildAndCaptureObject(Expr *syntacticBase);
     ExprResult buildGet();
     ExprResult buildSet(Expr *op, SourceLocation, bool);
+    ExprResult complete(Expr *SyntacticForm);
+
+    bool isWeakProperty() const;
   };
 
  /// A PseudoOpBuilder for Objective-C array/dictionary indexing.
@@ -292,7 +302,7 @@ OpaqueValueExpr *PseudoOpBuilder::capture(Expr *e) {
 /// operation.  This routine is safe against expressions which may
 /// already be captured.
 ///
-/// \param Returns the captured expression, which will be the
+/// \returns the captured expression, which will be the
 ///   same as the input if the input was already captured
 OpaqueValueExpr *PseudoOpBuilder::captureValueAsResult(Expr *e) {
   assert(ResultIndex == PseudoObjectExpr::NoResult);
@@ -353,7 +363,7 @@ PseudoOpBuilder::buildAssignmentOperation(Scope *Sc, SourceLocation opcLoc,
     syntactic = new (S.Context) BinaryOperator(syntacticLHS, capturedRHS,
                                                opcode, capturedRHS->getType(),
                                                capturedRHS->getValueKind(),
-                                               OK_Ordinary, opcLoc);
+                                               OK_Ordinary, opcLoc, false);
   } else {
     ExprResult opLHS = buildGet();
     if (opLHS.isInvalid()) return ExprError();
@@ -372,12 +382,12 @@ PseudoOpBuilder::buildAssignmentOperation(Scope *Sc, SourceLocation opcLoc,
                                              OK_Ordinary,
                                              opLHS.get()->getType(),
                                              result.get()->getType(),
-                                             opcLoc);
+                                             opcLoc, false);
   }
 
   // The result of the assignment, if not void, is the value set into
   // the l-value.
-  result = buildSet(result.take(), opcLoc, assignmentsHaveResult());
+  result = buildSet(result.take(), opcLoc, /*captureSetValueAsResult*/ true);
   if (result.isInvalid()) return ExprError();
   addSemanticExpr(result.take());
 
@@ -401,7 +411,7 @@ PseudoOpBuilder::buildIncDecOperation(Scope *Sc, SourceLocation opcLoc,
   QualType resultType = result.get()->getType();
 
   // That's the postfix result.
-  if (UnaryOperator::isPostfix(opcode) && assignmentsHaveResult()) {
+  if (UnaryOperator::isPostfix(opcode) && CanCaptureValueOfType(resultType)) {
     result = capture(result.take());
     setResultToLastSemantic();
   }
@@ -420,8 +430,7 @@ PseudoOpBuilder::buildIncDecOperation(Scope *Sc, SourceLocation opcLoc,
 
   // Store that back into the result.  The value stored is the result
   // of a prefix operation.
-  result = buildSet(result.take(), opcLoc,
-             UnaryOperator::isPrefix(opcode) && assignmentsHaveResult());
+  result = buildSet(result.take(), opcLoc, UnaryOperator::isPrefix(opcode));
   if (result.isInvalid()) return ExprError();
   addSemanticExpr(result.take());
 
@@ -472,6 +481,23 @@ static ObjCMethodDecl *LookupMethodInReceiverType(Sema &S, Selector sel,
   return S.LookupMethodInObjectType(sel, IT, false);
 }
 
+bool ObjCPropertyOpBuilder::isWeakProperty() const {
+  QualType T;
+  if (RefExpr->isExplicitProperty()) {
+    const ObjCPropertyDecl *Prop = RefExpr->getExplicitProperty();
+    if (Prop->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_weak)
+      return true;
+
+    T = Prop->getType();
+  } else if (Getter) {
+    T = Getter->getResultType();
+  } else {
+    return false;
+  }
+
+  return T.getObjCLifetime() == Qualifiers::OCL_Weak;
+}
+
 bool ObjCPropertyOpBuilder::findGetter() {
   if (Getter) return true;
 
@@ -532,7 +558,7 @@ bool ObjCPropertyOpBuilder::findSetter(bool warn) {
   // Do a normal method lookup first.
   if (ObjCMethodDecl *setter =
         LookupMethodInReceiverType(S, SetterSelector, RefExpr)) {
-    if (setter->isSynthesized() && warn)
+    if (setter->isPropertyAccessor() && warn)
       if (const ObjCInterfaceDecl *IFace =
           dyn_cast<ObjCInterfaceDecl>(setter->getDeclContext())) {
         const StringRef thisPropertyName(prop->getName());
@@ -617,7 +643,7 @@ ExprResult ObjCPropertyOpBuilder::buildGet() {
 
 /// Store to an Objective-C property reference.
 ///
-/// \param bindSetValueAsResult - If true, capture the actual
+/// \param captureSetValueAsResult If true, capture the actual
 ///   value being set as the value of the property operation.
 ExprResult ObjCPropertyOpBuilder::buildSet(Expr *op, SourceLocation opcLoc,
                                            bool captureSetValueAsResult) {
@@ -676,7 +702,8 @@ ExprResult ObjCPropertyOpBuilder::buildSet(Expr *op, SourceLocation opcLoc,
     ObjCMessageExpr *msgExpr =
       cast<ObjCMessageExpr>(msg.get()->IgnoreImplicit());
     Expr *arg = msgExpr->getArg(0);
-    msgExpr->setArg(0, captureValueAsResult(arg));
+    if (CanCaptureValueOfType(arg->getType()))
+      msgExpr->setArg(0, captureValueAsResult(arg));
   }
 
   return msg;
@@ -819,6 +846,19 @@ ObjCPropertyOpBuilder::buildIncDecOperation(Scope *Sc, SourceLocation opcLoc,
   return PseudoOpBuilder::buildIncDecOperation(Sc, opcLoc, opcode, op);
 }
 
+ExprResult ObjCPropertyOpBuilder::complete(Expr *SyntacticForm) {
+  if (S.getLangOpts().ObjCAutoRefCount && isWeakProperty()) {
+    DiagnosticsEngine::Level Level =
+      S.Diags.getDiagnosticLevel(diag::warn_arc_repeated_use_of_weak,
+                                 SyntacticForm->getLocStart());
+    if (Level != DiagnosticsEngine::Ignored)
+      S.getCurFunction()->recordUseOfWeak(SyntacticRefExpr,
+                                         SyntacticRefExpr->isMessagingGetter());
+  }
+
+  return PseudoOpBuilder::complete(SyntacticForm);
+}
+
 // ObjCSubscript build stuff.
 //
 
@@ -1035,7 +1075,7 @@ bool ObjCSubscriptOpBuilder::findAtIndexGetter() {
                            0 /*TypeSourceInfo */,
                            S.Context.getTranslationUnitDecl(),
                            true /*Instance*/, false/*isVariadic*/,
-                           /*isSynthesized=*/false,
+                           /*isPropertyAccessor=*/false,
                            /*isImplicitlyDeclared=*/true, /*isDefined=*/false,
                            ObjCMethodDecl::Required,
                            false);
@@ -1151,7 +1191,7 @@ bool ObjCSubscriptOpBuilder::findAtIndexSetter() {
                            ResultTInfo,
                            S.Context.getTranslationUnitDecl(),
                            true /*Instance*/, false/*isVariadic*/,
-                           /*isSynthesized=*/false,
+                           /*isPropertyAccessor=*/false,
                            /*isImplicitlyDeclared=*/true, /*isDefined=*/false,
                            ObjCMethodDecl::Required,
                            false); 
@@ -1255,7 +1295,7 @@ ExprResult ObjCSubscriptOpBuilder::buildGet() {
 /// Store into the container the "op" object at "Index"'ed location
 /// by building this messaging expression:
 /// - (void)setObject:(id)object atIndexedSubscript:(NSInteger)index;
-/// \param bindSetValueAsResult - If true, capture the actual
+/// \param captureSetValueAsResult If true, capture the actual
 ///   value being set as the value of the property operation.
 ExprResult ObjCSubscriptOpBuilder::buildSet(Expr *op, SourceLocation opcLoc,
                                            bool captureSetValueAsResult) {
@@ -1279,7 +1319,8 @@ ExprResult ObjCSubscriptOpBuilder::buildSet(Expr *op, SourceLocation opcLoc,
     ObjCMessageExpr *msgExpr =
       cast<ObjCMessageExpr>(msg.get()->IgnoreImplicit());
     Expr *arg = msgExpr->getArg(0);
-    msgExpr->setArg(0, captureValueAsResult(arg));
+    if (CanCaptureValueOfType(arg->getType()))
+      msgExpr->setArg(0, captureValueAsResult(arg));
   }
   
   return msg;
@@ -1333,7 +1374,7 @@ ExprResult Sema::checkPseudoObjectAssignment(Scope *S, SourceLocation opcLoc,
   // Do nothing if either argument is dependent.
   if (LHS->isTypeDependent() || RHS->isTypeDependent())
     return new (Context) BinaryOperator(LHS, RHS, opcode, Context.DependentTy,
-                                        VK_RValue, OK_Ordinary, opcLoc);
+                                        VK_RValue, OK_Ordinary, opcLoc, false);
 
   // Filter out non-overload placeholder types in the RHS.
   if (RHS->getType()->isNonOverloadPlaceholderType()) {
@@ -1404,14 +1445,14 @@ Expr *Sema::recreateSyntacticForm(PseudoObjectExpr *E) {
                                                 cop->getObjectKind(),
                                                 cop->getComputationLHSType(),
                                                 cop->getComputationResultType(),
-                                                cop->getOperatorLoc());
+                                                cop->getOperatorLoc(), false);
   } else if (BinaryOperator *bop = dyn_cast<BinaryOperator>(syntax)) {
     Expr *lhs = stripOpaqueValuesFromPseudoObjectRef(*this, bop->getLHS());
     Expr *rhs = cast<OpaqueValueExpr>(bop->getRHS())->getSourceExpr();
     return new (Context) BinaryOperator(lhs, rhs, bop->getOpcode(),
                                         bop->getType(), bop->getValueKind(),
                                         bop->getObjectKind(),
-                                        bop->getOperatorLoc());
+                                        bop->getOperatorLoc(), false);
   } else {
     assert(syntax->hasPlaceholderType(BuiltinType::PseudoObject));
     return stripOpaqueValuesFromPseudoObjectRef(*this, syntax);
diff --git a/lib/Sema/SemaStmt.cpp b/lib/Sema/SemaStmt.cpp
index 86884b787339..f55174e05cc1 100644
--- a/lib/Sema/SemaStmt.cpp
+++ b/lib/Sema/SemaStmt.cpp
@@ -28,27 +28,10 @@
 #include "clang/Lex/Preprocessor.h"
 #include "clang/Basic/TargetInfo.h"
 #include "llvm/ADT/ArrayRef.h"
-#include "llvm/ADT/BitVector.h"
 #include "llvm/ADT/STLExtras.h"
 #include "llvm/ADT/SmallPtrSet.h"
 #include "llvm/ADT/SmallString.h"
 #include "llvm/ADT/SmallVector.h"
-#include "llvm/ADT/Triple.h"
-#include "llvm/MC/MCAsmInfo.h"
-#include "llvm/MC/MCContext.h"
-#include "llvm/MC/MCInst.h"
-#include "llvm/MC/MCInstPrinter.h"
-#include "llvm/MC/MCInstrInfo.h"
-#include "llvm/MC/MCObjectFileInfo.h"
-#include "llvm/MC/MCRegisterInfo.h"
-#include "llvm/MC/MCStreamer.h"
-#include "llvm/MC/MCSubtargetInfo.h"
-#include "llvm/MC/MCTargetAsmParser.h"
-#include "llvm/MC/MCParser/MCAsmLexer.h"
-#include "llvm/MC/MCParser/MCAsmParser.h"
-#include "llvm/Support/SourceMgr.h"
-#include "llvm/Support/TargetRegistry.h"
-#include "llvm/Support/TargetSelect.h"
 using namespace clang;
 using namespace sema;
 
@@ -177,6 +160,13 @@ void Sema::DiagnoseUnusedExprResult(const Stmt *S) {
       !E->isUnusedResultAWarning(WarnExpr, Loc, R1, R2, Context))
     return;
 
+  // If this is a GNU statement expression expanded from a macro, it is probably
+  // unused because it is a function-like macro that can be used as either an
+  // expression or statement.  Don't warn, because it is almost certainly a
+  // false positive.
+  if (isa<StmtExpr>(E) && Loc.isMacroID())
+    return;
+
   // Okay, we have an unused result.  Depending on what the base expression is,
   // we might want to make a more specific diagnostic.  Check for one of these
   // cases now.
@@ -271,7 +261,7 @@ StmtResult
 Sema::ActOnCompoundStmt(SourceLocation L, SourceLocation R,
                         MultiStmtArg elts, bool isStmtExpr) {
   unsigned NumElts = elts.size();
-  Stmt **Elts = reinterpret_cast<Stmt**>(elts.release());
+  Stmt **Elts = elts.data();
   // If we're in C89 mode, check that we don't have any decls after stmts.  If
   // so, emit an extension diagnostic.
   if (!getLangOpts().C99 && !getLangOpts().CPlusPlus) {
@@ -381,8 +371,10 @@ Sema::ActOnLabelStmt(SourceLocation IdentLoc, LabelDecl *TheDecl,
   // Otherwise, things are good.  Fill in the declaration and return it.
   LabelStmt *LS = new (Context) LabelStmt(IdentLoc, TheDecl, SubStmt);
   TheDecl->setStmt(LS);
-  if (!TheDecl->isGnuLocal())
+  if (!TheDecl->isGnuLocal()) {
+    TheDecl->setLocStart(IdentLoc);
     TheDecl->setLocation(IdentLoc);
+  }
   return Owned(LS);
 }
 
@@ -1566,25 +1558,6 @@ Sema::ActOnObjCForCollectionStmt(SourceLocation ForLoc,
                                                    ForLoc, RParenLoc));
 }
 
-namespace {
-
-enum BeginEndFunction {
-  BEF_begin,
-  BEF_end
-};
-
-/// Build a variable declaration for a for-range statement.
-static VarDecl *BuildForRangeVarDecl(Sema &SemaRef, SourceLocation Loc,
-                                     QualType Type, const char *Name) {
-  DeclContext *DC = SemaRef.CurContext;
-  IdentifierInfo *II = &SemaRef.PP.getIdentifierTable().get(Name);
-  TypeSourceInfo *TInfo = SemaRef.Context.getTrivialTypeSourceInfo(Type, Loc);
-  VarDecl *Decl = VarDecl::Create(SemaRef.Context, DC, Loc, Loc, II, Type,
-                                  TInfo, SC_Auto, SC_None);
-  Decl->setImplicit();
-  return Decl;
-}
-
 /// Finish building a variable declaration for a for-range statement.
 /// \return true if an error occurs.
 static bool FinishForRangeVarDecl(Sema &SemaRef, VarDecl *Decl, Expr *Init,
@@ -1617,12 +1590,14 @@ static bool FinishForRangeVarDecl(Sema &SemaRef, VarDecl *Decl, Expr *Init,
   return false;
 }
 
+namespace {
+
 /// Produce a note indicating which begin/end function was implicitly called
-/// by a C++0x for-range statement. This is often not obvious from the code,
+/// by a C++11 for-range statement. This is often not obvious from the code,
 /// nor from the diagnostics produced when analysing the implicit expressions
 /// required in a for-range statement.
 void NoteForRangeBeginEndFunction(Sema &SemaRef, Expr *E,
-                                  BeginEndFunction BEF) {
+                                  Sema::BeginEndFunction BEF) {
   CallExpr *CE = dyn_cast<CallExpr>(E);
   if (!CE)
     return;
@@ -1643,56 +1618,16 @@ void NoteForRangeBeginEndFunction(Sema &SemaRef, Expr *E,
     << BEF << IsTemplate << Description << E->getType();
 }
 
-/// Build a call to 'begin' or 'end' for a C++0x for-range statement. If the
-/// given LookupResult is non-empty, it is assumed to describe a member which
-/// will be invoked. Otherwise, the function will be found via argument
-/// dependent lookup.
-static ExprResult BuildForRangeBeginEndCall(Sema &SemaRef, Scope *S,
-                                            SourceLocation Loc,
-                                            VarDecl *Decl,
-                                            BeginEndFunction BEF,
-                                            const DeclarationNameInfo &NameInfo,
-                                            LookupResult &MemberLookup,
-                                            Expr *Range) {
-  ExprResult CallExpr;
-  if (!MemberLookup.empty()) {
-    ExprResult MemberRef =
-      SemaRef.BuildMemberReferenceExpr(Range, Range->getType(), Loc,
-                                       /*IsPtr=*/false, CXXScopeSpec(),
-                                       /*TemplateKWLoc=*/SourceLocation(),
-                                       /*FirstQualifierInScope=*/0,
-                                       MemberLookup,
-                                       /*TemplateArgs=*/0);
-    if (MemberRef.isInvalid())
-      return ExprError();
-    CallExpr = SemaRef.ActOnCallExpr(S, MemberRef.get(), Loc, MultiExprArg(),
-                                     Loc, 0);
-    if (CallExpr.isInvalid())
-      return ExprError();
-  } else {
-    UnresolvedSet<0> FoundNames;
-    // C++0x [stmt.ranged]p1: For the purposes of this name lookup, namespace
-    // std is an associated namespace.
-    UnresolvedLookupExpr *Fn =
-      UnresolvedLookupExpr::Create(SemaRef.Context, /*NamingClass=*/0,
-                                   NestedNameSpecifierLoc(), NameInfo,
-                                   /*NeedsADL=*/true, /*Overloaded=*/false,
-                                   FoundNames.begin(), FoundNames.end(),
-                                   /*LookInStdNamespace=*/true);
-    CallExpr = SemaRef.BuildOverloadedCallExpr(S, Fn, Fn, Loc, &Range, 1, Loc,
-                                               0, /*AllowTypoCorrection=*/false);
-    if (CallExpr.isInvalid()) {
-      SemaRef.Diag(Range->getLocStart(), diag::note_for_range_type)
-        << Range->getType();
-      return ExprError();
-    }
-  }
-  if (FinishForRangeVarDecl(SemaRef, Decl, CallExpr.get(), Loc,
-                            diag::err_for_range_iter_deduction_failure)) {
-    NoteForRangeBeginEndFunction(SemaRef, CallExpr.get(), BEF);
-    return ExprError();
-  }
-  return CallExpr;
+/// Build a variable declaration for a for-range statement.
+VarDecl *BuildForRangeVarDecl(Sema &SemaRef, SourceLocation Loc,
+                              QualType Type, const char *Name) {
+  DeclContext *DC = SemaRef.CurContext;
+  IdentifierInfo *II = &SemaRef.PP.getIdentifierTable().get(Name);
+  TypeSourceInfo *TInfo = SemaRef.Context.getTrivialTypeSourceInfo(Type, Loc);
+  VarDecl *Decl = VarDecl::Create(SemaRef.Context, DC, Loc, Loc, II, Type,
+                                  TInfo, SC_Auto, SC_None);
+  Decl->setImplicit();
+  return Decl;
 }
 
 }
@@ -1723,7 +1658,7 @@ static bool ObjCEnumerationCollection(Expr *Collection) {
 StmtResult
 Sema::ActOnCXXForRangeStmt(SourceLocation ForLoc,
                            Stmt *First, SourceLocation ColonLoc, Expr *Range,
-                           SourceLocation RParenLoc) {
+                           SourceLocation RParenLoc, BuildForRangeKind Kind) {
   if (!First || !Range)
     return StmtError();
 
@@ -1761,15 +1696,137 @@ Sema::ActOnCXXForRangeStmt(SourceLocation ForLoc,
 
   return BuildCXXForRangeStmt(ForLoc, ColonLoc, RangeDecl.get(),
                               /*BeginEndDecl=*/0, /*Cond=*/0, /*Inc=*/0, DS,
-                              RParenLoc);
+                              RParenLoc, Kind);
 }
 
-/// BuildCXXForRangeStmt - Build or instantiate a C++0x for-range statement.
+/// \brief Create the initialization, compare, and increment steps for
+/// the range-based for loop expression.
+/// This function does not handle array-based for loops,
+/// which are created in Sema::BuildCXXForRangeStmt.
+///
+/// \returns a ForRangeStatus indicating success or what kind of error occurred.
+/// BeginExpr and EndExpr are set and FRS_Success is returned on success;
+/// CandidateSet and BEF are set and some non-success value is returned on
+/// failure.
+static Sema::ForRangeStatus BuildNonArrayForRange(Sema &SemaRef, Scope *S,
+                                            Expr *BeginRange, Expr *EndRange,
+                                            QualType RangeType,
+                                            VarDecl *BeginVar,
+                                            VarDecl *EndVar,
+                                            SourceLocation ColonLoc,
+                                            OverloadCandidateSet *CandidateSet,
+                                            ExprResult *BeginExpr,
+                                            ExprResult *EndExpr,
+                                            Sema::BeginEndFunction *BEF) {
+  DeclarationNameInfo BeginNameInfo(
+      &SemaRef.PP.getIdentifierTable().get("begin"), ColonLoc);
+  DeclarationNameInfo EndNameInfo(&SemaRef.PP.getIdentifierTable().get("end"),
+                                  ColonLoc);
+
+  LookupResult BeginMemberLookup(SemaRef, BeginNameInfo,
+                                 Sema::LookupMemberName);
+  LookupResult EndMemberLookup(SemaRef, EndNameInfo, Sema::LookupMemberName);
+
+  if (CXXRecordDecl *D = RangeType->getAsCXXRecordDecl()) {
+    // - if _RangeT is a class type, the unqualified-ids begin and end are
+    //   looked up in the scope of class _RangeT as if by class member access
+    //   lookup (3.4.5), and if either (or both) finds at least one
+    //   declaration, begin-expr and end-expr are __range.begin() and
+    //   __range.end(), respectively;
+    SemaRef.LookupQualifiedName(BeginMemberLookup, D);
+    SemaRef.LookupQualifiedName(EndMemberLookup, D);
+
+    if (BeginMemberLookup.empty() != EndMemberLookup.empty()) {
+      SourceLocation RangeLoc = BeginVar->getLocation();
+      *BEF = BeginMemberLookup.empty() ? Sema::BEF_end : Sema::BEF_begin;
+
+      SemaRef.Diag(RangeLoc, diag::err_for_range_member_begin_end_mismatch)
+          << RangeLoc << BeginRange->getType() << *BEF;
+      return Sema::FRS_DiagnosticIssued;
+    }
+  } else {
+    // - otherwise, begin-expr and end-expr are begin(__range) and
+    //   end(__range), respectively, where begin and end are looked up with
+    //   argument-dependent lookup (3.4.2). For the purposes of this name
+    //   lookup, namespace std is an associated namespace.
+
+  }
+
+  *BEF = Sema::BEF_begin;
+  Sema::ForRangeStatus RangeStatus =
+      SemaRef.BuildForRangeBeginEndCall(S, ColonLoc, ColonLoc, BeginVar,
+                                        Sema::BEF_begin, BeginNameInfo,
+                                        BeginMemberLookup, CandidateSet,
+                                        BeginRange, BeginExpr);
+
+  if (RangeStatus != Sema::FRS_Success)
+    return RangeStatus;
+  if (FinishForRangeVarDecl(SemaRef, BeginVar, BeginExpr->get(), ColonLoc,
+                            diag::err_for_range_iter_deduction_failure)) {
+    NoteForRangeBeginEndFunction(SemaRef, BeginExpr->get(), *BEF);
+    return Sema::FRS_DiagnosticIssued;
+  }
+
+  *BEF = Sema::BEF_end;
+  RangeStatus =
+      SemaRef.BuildForRangeBeginEndCall(S, ColonLoc, ColonLoc, EndVar,
+                                        Sema::BEF_end, EndNameInfo,
+                                        EndMemberLookup, CandidateSet,
+                                        EndRange, EndExpr);
+  if (RangeStatus != Sema::FRS_Success)
+    return RangeStatus;
+  if (FinishForRangeVarDecl(SemaRef, EndVar, EndExpr->get(), ColonLoc,
+                            diag::err_for_range_iter_deduction_failure)) {
+    NoteForRangeBeginEndFunction(SemaRef, EndExpr->get(), *BEF);
+    return Sema::FRS_DiagnosticIssued;
+  }
+  return Sema::FRS_Success;
+}
+
+/// Speculatively attempt to dereference an invalid range expression.
+/// If the attempt fails, this function will return a valid, null StmtResult
+/// and emit no diagnostics.
+static StmtResult RebuildForRangeWithDereference(Sema &SemaRef, Scope *S,
+                                                 SourceLocation ForLoc,
+                                                 Stmt *LoopVarDecl,
+                                                 SourceLocation ColonLoc,
+                                                 Expr *Range,
+                                                 SourceLocation RangeLoc,
+                                                 SourceLocation RParenLoc) {
+  // Determine whether we can rebuild the for-range statement with a
+  // dereferenced range expression.
+  ExprResult AdjustedRange;
+  {
+    Sema::SFINAETrap Trap(SemaRef);
+
+    AdjustedRange = SemaRef.BuildUnaryOp(S, RangeLoc, UO_Deref, Range);
+    if (AdjustedRange.isInvalid())
+      return StmtResult();
+
+    StmtResult SR =
+      SemaRef.ActOnCXXForRangeStmt(ForLoc, LoopVarDecl, ColonLoc,
+                                   AdjustedRange.get(), RParenLoc,
+                                   Sema::BFRK_Check);
+    if (SR.isInvalid())
+      return StmtResult();
+  }
+
+  // The attempt to dereference worked well enough that it could produce a valid
+  // loop. Produce a fixit, and rebuild the loop with diagnostics enabled, in
+  // case there are any other (non-fatal) problems with it.
+  SemaRef.Diag(RangeLoc, diag::err_for_range_dereference)
+    << Range->getType() << FixItHint::CreateInsertion(RangeLoc, "*");
+  return SemaRef.ActOnCXXForRangeStmt(ForLoc, LoopVarDecl, ColonLoc,
+                                      AdjustedRange.get(), RParenLoc,
+                                      Sema::BFRK_Rebuild);
+}
+
+/// BuildCXXForRangeStmt - Build or instantiate a C++11 for-range statement.
 StmtResult
 Sema::BuildCXXForRangeStmt(SourceLocation ForLoc, SourceLocation ColonLoc,
                            Stmt *RangeDecl, Stmt *BeginEnd, Expr *Cond,
                            Expr *Inc, Stmt *LoopVarDecl,
-                           SourceLocation RParenLoc) {
+                           SourceLocation RParenLoc, BuildForRangeKind Kind) {
   Scope *S = getCurScope();
 
   DeclStmt *RangeDS = cast<DeclStmt>(RangeDecl);
@@ -1855,50 +1912,43 @@ Sema::BuildCXXForRangeStmt(SourceLocation ForLoc, SourceLocation ColonLoc,
         return StmtError();
       }
     } else {
-      DeclarationNameInfo BeginNameInfo(&PP.getIdentifierTable().get("begin"),
-                                        ColonLoc);
-      DeclarationNameInfo EndNameInfo(&PP.getIdentifierTable().get("end"),
-                                      ColonLoc);
-
-      LookupResult BeginMemberLookup(*this, BeginNameInfo, LookupMemberName);
-      LookupResult EndMemberLookup(*this, EndNameInfo, LookupMemberName);
-
-      if (CXXRecordDecl *D = RangeType->getAsCXXRecordDecl()) {
-        // - if _RangeT is a class type, the unqualified-ids begin and end are
-        //   looked up in the scope of class _RangeT as if by class member access
-        //   lookup (3.4.5), and if either (or both) finds at least one
-        //   declaration, begin-expr and end-expr are __range.begin() and
-        //   __range.end(), respectively;
-        LookupQualifiedName(BeginMemberLookup, D);
-        LookupQualifiedName(EndMemberLookup, D);
-
-        if (BeginMemberLookup.empty() != EndMemberLookup.empty()) {
-          Diag(ColonLoc, diag::err_for_range_member_begin_end_mismatch)
-            << RangeType << BeginMemberLookup.empty();
-          return StmtError();
-        }
-      } else {
-        // - otherwise, begin-expr and end-expr are begin(__range) and
-        //   end(__range), respectively, where begin and end are looked up with
-        //   argument-dependent lookup (3.4.2). For the purposes of this name
-        //   lookup, namespace std is an associated namespace.
+      OverloadCandidateSet CandidateSet(RangeLoc);
+      Sema::BeginEndFunction BEFFailure;
+      ForRangeStatus RangeStatus =
+          BuildNonArrayForRange(*this, S, BeginRangeRef.get(),
+                                EndRangeRef.get(), RangeType,
+                                BeginVar, EndVar, ColonLoc, &CandidateSet,
+                                &BeginExpr, &EndExpr, &BEFFailure);
+
+      // If building the range failed, try dereferencing the range expression
+      // unless a diagnostic was issued or the end function is problematic.
+      if (Kind == BFRK_Build && RangeStatus == FRS_NoViableFunction &&
+          BEFFailure == BEF_begin) {
+        StmtResult SR = RebuildForRangeWithDereference(*this, S, ForLoc,
+                                                       LoopVarDecl, ColonLoc,
+                                                       Range, RangeLoc,
+                                                       RParenLoc);
+        if (SR.isInvalid() || SR.isUsable())
+          return SR;
       }
 
-      BeginExpr = BuildForRangeBeginEndCall(*this, S, ColonLoc, BeginVar,
-                                            BEF_begin, BeginNameInfo,
-                                            BeginMemberLookup,
-                                            BeginRangeRef.get());
-      if (BeginExpr.isInvalid())
-        return StmtError();
-
-      EndExpr = BuildForRangeBeginEndCall(*this, S, ColonLoc, EndVar,
-                                          BEF_end, EndNameInfo,
-                                          EndMemberLookup, EndRangeRef.get());
-      if (EndExpr.isInvalid())
+      // Otherwise, emit diagnostics if we haven't already.
+      if (RangeStatus == FRS_NoViableFunction) {
+        Expr *Range = BEFFailure ? EndRangeRef.get() : BeginRangeRef.get();
+        Diag(Range->getLocStart(), diag::err_for_range_invalid)
+            << RangeLoc << Range->getType() << BEFFailure;
+        CandidateSet.NoteCandidates(*this, OCD_AllCandidates,
+                                    llvm::makeArrayRef(&Range, /*NumArgs=*/1));
+      }
+      // Return an error if no fix was discovered.
+      if (RangeStatus != FRS_Success)
         return StmtError();
     }
 
-    // C++0x [decl.spec.auto]p6: BeginType and EndType must be the same.
+    assert(!BeginExpr.isInvalid() && !EndExpr.isInvalid() &&
+           "invalid range expression in for loop");
+
+    // C++11 [dcl.spec.auto]p7: BeginType and EndType must be the same.
     QualType BeginType = BeginVar->getType(), EndType = EndVar->getType();
     if (!Context.hasSameType(BeginType, EndType)) {
       Diag(RangeLoc, diag::err_for_range_begin_end_types_differ)
@@ -1930,6 +1980,8 @@ Sema::BuildCXXForRangeStmt(SourceLocation ForLoc, SourceLocation ColonLoc,
     NotEqExpr = ActOnBooleanCondition(S, ColonLoc, NotEqExpr.get());
     NotEqExpr = ActOnFinishFullExpr(NotEqExpr.get());
     if (NotEqExpr.isInvalid()) {
+      Diag(RangeLoc, diag::note_for_range_invalid_iterator)
+        << RangeLoc << 0 << BeginRangeRef.get()->getType();
       NoteForRangeBeginEndFunction(*this, BeginExpr.get(), BEF_begin);
       if (!Context.hasSameType(BeginType, EndType))
         NoteForRangeBeginEndFunction(*this, EndExpr.get(), BEF_end);
@@ -1945,6 +1997,8 @@ Sema::BuildCXXForRangeStmt(SourceLocation ForLoc, SourceLocation ColonLoc,
     IncrExpr = ActOnUnaryOp(S, ColonLoc, tok::plusplus, BeginRef.get());
     IncrExpr = ActOnFinishFullExpr(IncrExpr.get());
     if (IncrExpr.isInvalid()) {
+      Diag(RangeLoc, diag::note_for_range_invalid_iterator)
+        << RangeLoc << 2 << BeginRangeRef.get()->getType() ;
       NoteForRangeBeginEndFunction(*this, BeginExpr.get(), BEF_begin);
       return StmtError();
     }
@@ -1957,12 +2011,15 @@ Sema::BuildCXXForRangeStmt(SourceLocation ForLoc, SourceLocation ColonLoc,
 
     ExprResult DerefExpr = ActOnUnaryOp(S, ColonLoc, tok::star, BeginRef.get());
     if (DerefExpr.isInvalid()) {
+      Diag(RangeLoc, diag::note_for_range_invalid_iterator)
+        << RangeLoc << 1 << BeginRangeRef.get()->getType();
       NoteForRangeBeginEndFunction(*this, BeginExpr.get(), BEF_begin);
       return StmtError();
     }
 
-    // Attach  *__begin  as initializer for VD.
-    if (!LoopVar->isInvalidDecl()) {
+    // Attach  *__begin  as initializer for VD. Don't touch it if we're just
+    // trying to determine whether this would be a valid range.
+    if (!LoopVar->isInvalidDecl() && Kind != BFRK_Check) {
       AddInitializerToDecl(LoopVar, DerefExpr.get(), /*DirectInit=*/false,
                            /*TypeMayContainAuto=*/true);
       if (LoopVar->isInvalidDecl())
@@ -1973,6 +2030,11 @@ Sema::BuildCXXForRangeStmt(SourceLocation ForLoc, SourceLocation ColonLoc,
     RangeVar->setUsed();
   }
 
+  // Don't bother to actually allocate the result if we're just trying to
+  // determine whether it would be valid.
+  if (Kind == BFRK_Check)
+    return StmtResult();
+
   return Owned(new (Context) CXXForRangeStmt(RangeDS,
                                      cast_or_null<DeclStmt>(BeginEndDecl.get()),
                                              NotEqExpr.take(), IncrExpr.take(),
@@ -2485,600 +2547,6 @@ Sema::ActOnReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp) {
   return Owned(Result);
 }
 
-/// CheckAsmLValue - GNU C has an extremely ugly extension whereby they silently
-/// ignore "noop" casts in places where an lvalue is required by an inline asm.
-/// We emulate this behavior when -fheinous-gnu-extensions is specified, but
-/// provide a strong guidance to not use it.
-///
-/// This method checks to see if the argument is an acceptable l-value and
-/// returns false if it is a case we can handle.
-static bool CheckAsmLValue(const Expr *E, Sema &S) {
-  // Type dependent expressions will be checked during instantiation.
-  if (E->isTypeDependent())
-    return false;
-
-  if (E->isLValue())
-    return false;  // Cool, this is an lvalue.
-
-  // Okay, this is not an lvalue, but perhaps it is the result of a cast that we
-  // are supposed to allow.
-  const Expr *E2 = E->IgnoreParenNoopCasts(S.Context);
-  if (E != E2 && E2->isLValue()) {
-    if (!S.getLangOpts().HeinousExtensions)
-      S.Diag(E2->getLocStart(), diag::err_invalid_asm_cast_lvalue)
-        << E->getSourceRange();
-    else
-      S.Diag(E2->getLocStart(), diag::warn_invalid_asm_cast_lvalue)
-        << E->getSourceRange();
-    // Accept, even if we emitted an error diagnostic.
-    return false;
-  }
-
-  // None of the above, just randomly invalid non-lvalue.
-  return true;
-}
-
-/// isOperandMentioned - Return true if the specified operand # is mentioned
-/// anywhere in the decomposed asm string.
-static bool isOperandMentioned(unsigned OpNo,
-                         ArrayRef<AsmStmt::AsmStringPiece> AsmStrPieces) {
-  for (unsigned p = 0, e = AsmStrPieces.size(); p != e; ++p) {
-    const AsmStmt::AsmStringPiece &Piece = AsmStrPieces[p];
-    if (!Piece.isOperand()) continue;
-
-    // If this is a reference to the input and if the input was the smaller
-    // one, then we have to reject this asm.
-    if (Piece.getOperandNo() == OpNo)
-      return true;
-  }
-  return false;
-}
-
-StmtResult Sema::ActOnAsmStmt(SourceLocation AsmLoc, bool IsSimple,
-                              bool IsVolatile, unsigned NumOutputs,
-                              unsigned NumInputs, IdentifierInfo **Names,
-                              MultiExprArg constraints, MultiExprArg exprs,
-                              Expr *asmString, MultiExprArg clobbers,
-                              SourceLocation RParenLoc, bool MSAsm) {
-  unsigned NumClobbers = clobbers.size();
-  StringLiteral **Constraints =
-    reinterpret_cast<StringLiteral**>(constraints.get());
-  Expr **Exprs = exprs.get();
-  StringLiteral *AsmString = cast<StringLiteral>(asmString);
-  StringLiteral **Clobbers = reinterpret_cast<StringLiteral**>(clobbers.get());
-
-  SmallVector<TargetInfo::ConstraintInfo, 4> OutputConstraintInfos;
-
-  // The parser verifies that there is a string literal here.
-  if (!AsmString->isAscii())
-    return StmtError(Diag(AsmString->getLocStart(),diag::err_asm_wide_character)
-      << AsmString->getSourceRange());
-
-  for (unsigned i = 0; i != NumOutputs; i++) {
-    StringLiteral *Literal = Constraints[i];
-    if (!Literal->isAscii())
-      return StmtError(Diag(Literal->getLocStart(),diag::err_asm_wide_character)
-        << Literal->getSourceRange());
-
-    StringRef OutputName;
-    if (Names[i])
-      OutputName = Names[i]->getName();
-
-    TargetInfo::ConstraintInfo Info(Literal->getString(), OutputName);
-    if (!Context.getTargetInfo().validateOutputConstraint(Info))
-      return StmtError(Diag(Literal->getLocStart(),
-                            diag::err_asm_invalid_output_constraint)
-                       << Info.getConstraintStr());
-
-    // Check that the output exprs are valid lvalues.
-    Expr *OutputExpr = Exprs[i];
-    if (CheckAsmLValue(OutputExpr, *this)) {
-      return StmtError(Diag(OutputExpr->getLocStart(),
-                  diag::err_asm_invalid_lvalue_in_output)
-        << OutputExpr->getSourceRange());
-    }
-
-    OutputConstraintInfos.push_back(Info);
-  }
-
-  SmallVector<TargetInfo::ConstraintInfo, 4> InputConstraintInfos;
-
-  for (unsigned i = NumOutputs, e = NumOutputs + NumInputs; i != e; i++) {
-    StringLiteral *Literal = Constraints[i];
-    if (!Literal->isAscii())
-      return StmtError(Diag(Literal->getLocStart(),diag::err_asm_wide_character)
-        << Literal->getSourceRange());
-
-    StringRef InputName;
-    if (Names[i])
-      InputName = Names[i]->getName();
-
-    TargetInfo::ConstraintInfo Info(Literal->getString(), InputName);
-    if (!Context.getTargetInfo().validateInputConstraint(OutputConstraintInfos.data(),
-                                                NumOutputs, Info)) {
-      return StmtError(Diag(Literal->getLocStart(),
-                            diag::err_asm_invalid_input_constraint)
-                       << Info.getConstraintStr());
-    }
-
-    Expr *InputExpr = Exprs[i];
-
-    // Only allow void types for memory constraints.
-    if (Info.allowsMemory() && !Info.allowsRegister()) {
-      if (CheckAsmLValue(InputExpr, *this))
-        return StmtError(Diag(InputExpr->getLocStart(),
-                              diag::err_asm_invalid_lvalue_in_input)
-                         << Info.getConstraintStr()
-                         << InputExpr->getSourceRange());
-    }
-
-    if (Info.allowsRegister()) {
-      if (InputExpr->getType()->isVoidType()) {
-        return StmtError(Diag(InputExpr->getLocStart(),
-                              diag::err_asm_invalid_type_in_input)
-          << InputExpr->getType() << Info.getConstraintStr()
-          << InputExpr->getSourceRange());
-      }
-    }
-
-    ExprResult Result = DefaultFunctionArrayLvalueConversion(Exprs[i]);
-    if (Result.isInvalid())
-      return StmtError();
-
-    Exprs[i] = Result.take();
-    InputConstraintInfos.push_back(Info);
-  }
-
-  // Check that the clobbers are valid.
-  for (unsigned i = 0; i != NumClobbers; i++) {
-    StringLiteral *Literal = Clobbers[i];
-    if (!Literal->isAscii())
-      return StmtError(Diag(Literal->getLocStart(),diag::err_asm_wide_character)
-        << Literal->getSourceRange());
-
-    StringRef Clobber = Literal->getString();
-
-    if (!Context.getTargetInfo().isValidClobber(Clobber))
-      return StmtError(Diag(Literal->getLocStart(),
-                  diag::err_asm_unknown_register_name) << Clobber);
-  }
-
-  AsmStmt *NS =
-    new (Context) AsmStmt(Context, AsmLoc, IsSimple, IsVolatile, MSAsm,
-                          NumOutputs, NumInputs, Names, Constraints, Exprs,
-                          AsmString, NumClobbers, Clobbers, RParenLoc);
-  // Validate the asm string, ensuring it makes sense given the operands we
-  // have.
-  SmallVector<AsmStmt::AsmStringPiece, 8> Pieces;
-  unsigned DiagOffs;
-  if (unsigned DiagID = NS->AnalyzeAsmString(Pieces, Context, DiagOffs)) {
-    Diag(getLocationOfStringLiteralByte(AsmString, DiagOffs), DiagID)
-           << AsmString->getSourceRange();
-    return StmtError();
-  }
-
-  // Validate tied input operands for type mismatches.
-  for (unsigned i = 0, e = InputConstraintInfos.size(); i != e; ++i) {
-    TargetInfo::ConstraintInfo &Info = InputConstraintInfos[i];
-
-    // If this is a tied constraint, verify that the output and input have
-    // either exactly the same type, or that they are int/ptr operands with the
-    // same size (int/long, int*/long, are ok etc).
-    if (!Info.hasTiedOperand()) continue;
-
-    unsigned TiedTo = Info.getTiedOperand();
-    unsigned InputOpNo = i+NumOutputs;
-    Expr *OutputExpr = Exprs[TiedTo];
-    Expr *InputExpr = Exprs[InputOpNo];
-
-    if (OutputExpr->isTypeDependent() || InputExpr->isTypeDependent())
-      continue;
-
-    QualType InTy = InputExpr->getType();
-    QualType OutTy = OutputExpr->getType();
-    if (Context.hasSameType(InTy, OutTy))
-      continue;  // All types can be tied to themselves.
-
-    // Decide if the input and output are in the same domain (integer/ptr or
-    // floating point.
-    enum AsmDomain {
-      AD_Int, AD_FP, AD_Other
-    } InputDomain, OutputDomain;
-
-    if (InTy->isIntegerType() || InTy->isPointerType())
-      InputDomain = AD_Int;
-    else if (InTy->isRealFloatingType())
-      InputDomain = AD_FP;
-    else
-      InputDomain = AD_Other;
-
-    if (OutTy->isIntegerType() || OutTy->isPointerType())
-      OutputDomain = AD_Int;
-    else if (OutTy->isRealFloatingType())
-      OutputDomain = AD_FP;
-    else
-      OutputDomain = AD_Other;
-
-    // They are ok if they are the same size and in the same domain.  This
-    // allows tying things like:
-    //   void* to int*
-    //   void* to int            if they are the same size.
-    //   double to long double   if they are the same size.
-    //
-    uint64_t OutSize = Context.getTypeSize(OutTy);
-    uint64_t InSize = Context.getTypeSize(InTy);
-    if (OutSize == InSize && InputDomain == OutputDomain &&
-        InputDomain != AD_Other)
-      continue;
-
-    // If the smaller input/output operand is not mentioned in the asm string,
-    // then we can promote the smaller one to a larger input and the asm string
-    // won't notice.
-    bool SmallerValueMentioned = false;
-
-    // If this is a reference to the input and if the input was the smaller
-    // one, then we have to reject this asm.
-    if (isOperandMentioned(InputOpNo, Pieces)) {
-      // This is a use in the asm string of the smaller operand.  Since we
-      // codegen this by promoting to a wider value, the asm will get printed
-      // "wrong".
-      SmallerValueMentioned |= InSize < OutSize;
-    }
-    if (isOperandMentioned(TiedTo, Pieces)) {
-      // If this is a reference to the output, and if the output is the larger
-      // value, then it's ok because we'll promote the input to the larger type.
-      SmallerValueMentioned |= OutSize < InSize;
-    }
-
-    // If the smaller value wasn't mentioned in the asm string, and if the
-    // output was a register, just extend the shorter one to the size of the
-    // larger one.
-    if (!SmallerValueMentioned && InputDomain != AD_Other &&
-        OutputConstraintInfos[TiedTo].allowsRegister())
-      continue;
-
-    // Either both of the operands were mentioned or the smaller one was
-    // mentioned.  One more special case that we'll allow: if the tied input is
-    // integer, unmentioned, and is a constant, then we'll allow truncating it
-    // down to the size of the destination.
-    if (InputDomain == AD_Int && OutputDomain == AD_Int &&
-        !isOperandMentioned(InputOpNo, Pieces) &&
-        InputExpr->isEvaluatable(Context)) {
-      CastKind castKind =
-        (OutTy->isBooleanType() ? CK_IntegralToBoolean : CK_IntegralCast);
-      InputExpr = ImpCastExprToType(InputExpr, OutTy, castKind).take();
-      Exprs[InputOpNo] = InputExpr;
-      NS->setInputExpr(i, InputExpr);
-      continue;
-    }
-
-    Diag(InputExpr->getLocStart(),
-         diag::err_asm_tying_incompatible_types)
-      << InTy << OutTy << OutputExpr->getSourceRange()
-      << InputExpr->getSourceRange();
-    return StmtError();
-  }
-
-  return Owned(NS);
-}
-
-// isMSAsmKeyword - Return true if this is an MS-style inline asm keyword. These
-// require special handling.
-static bool isMSAsmKeyword(StringRef Name) {
-  bool Ret = llvm::StringSwitch<bool>(Name)
-    .Cases("EVEN", "ALIGN", true) // Alignment directives.
-    .Cases("LENGTH", "SIZE", "TYPE", true) // Type and variable sizes.
-    .Case("_emit", true) // _emit Pseudoinstruction.
-    .Default(false);
-  return Ret;
-}
-
-static StringRef getSpelling(Sema &SemaRef, Token AsmTok) {
-  StringRef Asm;
-  SmallString<512> TokenBuf;
-  TokenBuf.resize(512);
-  bool StringInvalid = false;
-  Asm = SemaRef.PP.getSpelling(AsmTok, TokenBuf, &StringInvalid);
-  assert (!StringInvalid && "Expected valid string!");
-  return Asm;
-}
-
-static void patchMSAsmStrings(Sema &SemaRef, bool &IsSimple,
-                              SourceLocation AsmLoc,
-                              ArrayRef<Token> AsmToks,
-                              const TargetInfo &TI,
-                              std::vector<llvm::BitVector> &AsmRegs,
-                              std::vector<llvm::BitVector> &AsmNames,
-                              std::vector<std::string> &AsmStrings) {
-  assert (!AsmToks.empty() && "Didn't expect an empty AsmToks!");
-
-  // Assume simple asm stmt until we parse a non-register identifer (or we just
-  // need to bail gracefully).
-  IsSimple = true;
-
-  SmallString<512> Asm;
-  unsigned NumAsmStrings = 0;
-  for (unsigned i = 0, e = AsmToks.size(); i != e; ++i) {
-
-    // Determine if this should be considered a new asm.
-    bool isNewAsm = i == 0 || AsmToks[i].isAtStartOfLine() ||
-      AsmToks[i].is(tok::kw_asm);
-
-    // Emit the previous asm string.
-    if (i && isNewAsm) {
-      AsmStrings[NumAsmStrings++] = Asm.c_str();
-      if (AsmToks[i].is(tok::kw_asm)) {
-        ++i; // Skip __asm
-        assert (i != e && "Expected another token.");
-      }
-    }
-
-    // Start a new asm string with the opcode.
-    if (isNewAsm) {
-      AsmRegs[NumAsmStrings].resize(AsmToks.size());
-      AsmNames[NumAsmStrings].resize(AsmToks.size());
-
-      StringRef Piece = AsmToks[i].getIdentifierInfo()->getName();
-      // MS-style inline asm keywords require special handling.
-      if (isMSAsmKeyword(Piece))
-        IsSimple = false;
-
-      // TODO: Verify this is a valid opcode.
-      Asm = Piece;
-      continue;
-    }
-
-    if (i && AsmToks[i].hasLeadingSpace())
-      Asm += ' ';
-
-    // Check the operand(s).
-    switch (AsmToks[i].getKind()) {
-    default:
-      IsSimple = false;
-      Asm += getSpelling(SemaRef, AsmToks[i]);
-      break;
-    case tok::comma: Asm += ","; break;
-    case tok::colon: Asm += ":"; break;
-    case tok::l_square: Asm += "["; break;
-    case tok::r_square: Asm += "]"; break;
-    case tok::l_brace: Asm += "{"; break;
-    case tok::r_brace: Asm += "}"; break;
-    case tok::numeric_constant:
-      Asm += getSpelling(SemaRef, AsmToks[i]);
-      break;
-    case tok::identifier: {
-      IdentifierInfo *II = AsmToks[i].getIdentifierInfo();
-      StringRef Name = II->getName();
-
-      // Valid register?
-      if (TI.isValidGCCRegisterName(Name)) {
-        AsmRegs[NumAsmStrings].set(i);
-        Asm += Name;
-        break;
-      }
-
-      IsSimple = false;
-
-      // MS-style inline asm keywords require special handling.
-      if (isMSAsmKeyword(Name)) {
-        IsSimple = false;
-        Asm += Name;
-        break;
-      }
-
-      // FIXME: Why are we missing this segment register?
-      if (Name == "fs") {
-        Asm += Name;
-        break;
-      }
-
-      // Lookup the identifier.
-      // TODO: Someone with more experience with clang should verify this the
-      // proper way of doing a symbol lookup.
-      DeclarationName DeclName(II);
-      Scope *CurScope = SemaRef.getCurScope();
-      LookupResult R(SemaRef, DeclName, AsmLoc, Sema::LookupOrdinaryName);
-      if (!SemaRef.LookupName(R, CurScope, false/*AllowBuiltinCreation*/))
-        break;
-
-      assert (R.isSingleResult() && "Expected a single result?!");
-      NamedDecl *Decl = R.getFoundDecl();
-      switch (Decl->getKind()) {
-      default:
-        assert(0 && "Unknown decl kind.");
-        break;
-      case Decl::Var: {
-      case Decl::ParmVar:
-        AsmNames[NumAsmStrings].set(i);
-
-        VarDecl *Var = cast<VarDecl>(Decl);
-        QualType Ty = Var->getType();
-        (void)Ty; // Avoid warning.
-        // TODO: Patch identifier with valid operand.  One potential idea is to
-        // probe the backend with type information to guess the possible
-        // operand.
-        break;
-      }
-      }
-      break;
-    }
-    }
-  }
-
-  // Emit the final (and possibly only) asm string.
-  AsmStrings[NumAsmStrings] = Asm.c_str();
-}
-
-// Build the unmodified MSAsmString.
-static std::string buildMSAsmString(Sema &SemaRef,
-                                    ArrayRef<Token> AsmToks,
-                                    unsigned &NumAsmStrings) {
-  assert (!AsmToks.empty() && "Didn't expect an empty AsmToks!");
-  NumAsmStrings = 0;
-
-  SmallString<512> Asm;
-  for (unsigned i = 0, e = AsmToks.size(); i < e; ++i) {
-    bool isNewAsm = i == 0 || AsmToks[i].isAtStartOfLine() ||
-      AsmToks[i].is(tok::kw_asm);
-
-    if (isNewAsm) {
-      ++NumAsmStrings;
-      if (i)
-        Asm += '\n';
-      if (AsmToks[i].is(tok::kw_asm)) {
-        i++; // Skip __asm
-        assert (i != e && "Expected another token");
-      }
-    }
-
-    if (i && AsmToks[i].hasLeadingSpace() && !isNewAsm)
-      Asm += ' ';
-
-    Asm += getSpelling(SemaRef, AsmToks[i]);
-  }
-  return Asm.c_str();
-}
-
-StmtResult Sema::ActOnMSAsmStmt(SourceLocation AsmLoc,
-                                SourceLocation LBraceLoc,
-                                ArrayRef<Token> AsmToks,
-                                SourceLocation EndLoc) {
-  // MS-style inline assembly is not fully supported, so emit a warning.
-  Diag(AsmLoc, diag::warn_unsupported_msasm);
-  SmallVector<StringRef,4> Clobbers;
-  std::set<std::string> ClobberRegs;
-  SmallVector<IdentifierInfo*, 4> Inputs;
-  SmallVector<IdentifierInfo*, 4> Outputs;
-
-  // Empty asm statements don't need to instantiate the AsmParser, etc.
-  if (AsmToks.empty()) {
-    StringRef AsmString;
-    MSAsmStmt *NS =
-      new (Context) MSAsmStmt(Context, AsmLoc, LBraceLoc, /*IsSimple*/ true,
-                              /*IsVolatile*/ true, AsmToks, Inputs, Outputs,
-                              AsmString, Clobbers, EndLoc);
-    return Owned(NS);
-  }
-
-  unsigned NumAsmStrings;
-  std::string AsmString = buildMSAsmString(*this, AsmToks, NumAsmStrings);
-
-  bool IsSimple;
-  std::vector<llvm::BitVector> Regs;
-  std::vector<llvm::BitVector> Names;
-  std::vector<std::string> PatchedAsmStrings;
-
-  Regs.resize(NumAsmStrings);
-  Names.resize(NumAsmStrings);
-  PatchedAsmStrings.resize(NumAsmStrings);
-
-  // Rewrite operands to appease the AsmParser.
-  patchMSAsmStrings(*this, IsSimple, AsmLoc, AsmToks,
-                    Context.getTargetInfo(), Regs, Names, PatchedAsmStrings);
-
-  // patchMSAsmStrings doesn't correctly patch non-simple asm statements.
-  if (!IsSimple) {
-    MSAsmStmt *NS =
-      new (Context) MSAsmStmt(Context, AsmLoc, LBraceLoc, /*IsSimple*/ true,
-                              /*IsVolatile*/ true, AsmToks, Inputs, Outputs,
-                              AsmString, Clobbers, EndLoc);
-    return Owned(NS);
-  }
-
-  // Initialize targets and assembly printers/parsers.
-  llvm::InitializeAllTargetInfos();
-  llvm::InitializeAllTargetMCs();
-  llvm::InitializeAllAsmParsers();
-
-  // Get the target specific parser.
-  std::string Error;
-  const std::string &TT = Context.getTargetInfo().getTriple().getTriple();
-  const llvm::Target *TheTarget(llvm::TargetRegistry::lookupTarget(TT, Error));
-
-  OwningPtr<llvm::MCAsmInfo> MAI(TheTarget->createMCAsmInfo(TT));
-  OwningPtr<llvm::MCRegisterInfo> MRI(TheTarget->createMCRegInfo(TT));
-  OwningPtr<llvm::MCObjectFileInfo> MOFI(new llvm::MCObjectFileInfo());
-  OwningPtr<llvm::MCSubtargetInfo>
-    STI(TheTarget->createMCSubtargetInfo(TT, "", ""));
-
-  for (unsigned i = 0, e = PatchedAsmStrings.size(); i != e; ++i) {
-    llvm::SourceMgr SrcMgr;
-    llvm::MCContext Ctx(*MAI, *MRI, MOFI.get(), &SrcMgr);
-    llvm::MemoryBuffer *Buffer =
-      llvm::MemoryBuffer::getMemBuffer(PatchedAsmStrings[i], "<inline asm>");
-
-    // Tell SrcMgr about this buffer, which is what the parser will pick up.
-    SrcMgr.AddNewSourceBuffer(Buffer, llvm::SMLoc());
-
-    OwningPtr<llvm::MCStreamer> Str(createNullStreamer(Ctx));
-    OwningPtr<llvm::MCAsmParser>
-      Parser(createMCAsmParser(SrcMgr, Ctx, *Str.get(), *MAI));
-    OwningPtr<llvm::MCTargetAsmParser>
-      TargetParser(TheTarget->createMCAsmParser(*STI, *Parser));
-    // Change to the Intel dialect.
-    Parser->setAssemblerDialect(1);
-    Parser->setTargetParser(*TargetParser.get());
-
-    // Prime the lexer.
-    Parser->Lex();
-
-    // Parse the opcode.
-    StringRef IDVal;
-    Parser->ParseIdentifier(IDVal);
-
-    // Canonicalize the opcode to lower case.
-    SmallString<128> Opcode;
-    for (unsigned i = 0, e = IDVal.size(); i != e; ++i)
-      Opcode.push_back(tolower(IDVal[i]));
-
-    // Parse the operands.
-    llvm::SMLoc IDLoc;
-    SmallVector<llvm::MCParsedAsmOperand*, 8> Operands;
-    bool HadError = TargetParser->ParseInstruction(Opcode.str(), IDLoc,
-                                                   Operands);
-    assert (!HadError && "Unexpected error parsing instruction");
-
-    // Match the MCInstr.
-    SmallVector<llvm::MCInst, 2> Instrs;
-    HadError = TargetParser->MatchInstruction(IDLoc, Operands, Instrs);
-    assert (!HadError && "Unexpected error matching instruction");
-    assert ((Instrs.size() == 1) && "Expected only a single instruction.");
-
-    // Get the instruction descriptor.
-    llvm::MCInst Inst = Instrs[0];
-    const llvm::MCInstrInfo *MII = TheTarget->createMCInstrInfo();
-    const llvm::MCInstrDesc &Desc = MII->get(Inst.getOpcode());
-    llvm::MCInstPrinter *IP =
-      TheTarget->createMCInstPrinter(1, *MAI, *MII, *MRI, *STI);
-
-    // Build the list of clobbers.
-    for (unsigned i = 0, e = Desc.getNumDefs(); i != e; ++i) {
-      const llvm::MCOperand &Op = Inst.getOperand(i);
-      if (!Op.isReg())
-        continue;
-
-      std::string Reg;
-      llvm::raw_string_ostream OS(Reg);
-      IP->printRegName(OS, Op.getReg());
-
-      StringRef Clobber(OS.str());
-      if (!Context.getTargetInfo().isValidClobber(Clobber))
-        return StmtError(Diag(AsmLoc, diag::err_asm_unknown_register_name) <<
-                         Clobber);
-      ClobberRegs.insert(Reg);
-    }
-  }
-  for (std::set<std::string>::iterator I = ClobberRegs.begin(),
-         E = ClobberRegs.end(); I != E; ++I)
-    Clobbers.push_back(*I);
-
-  MSAsmStmt *NS =
-    new (Context) MSAsmStmt(Context, AsmLoc, LBraceLoc, IsSimple,
-                            /*IsVolatile*/ true, AsmToks, Inputs, Outputs,
-                            AsmString, Clobbers, EndLoc);
-  return Owned(NS);
-}
-
 StmtResult
 Sema::ActOnObjCAtCatchStmt(SourceLocation AtLoc,
                            SourceLocation RParen, Decl *Parm,
@@ -3104,7 +2572,7 @@ Sema::ActOnObjCAtTryStmt(SourceLocation AtLoc, Stmt *Try,
   getCurFunction()->setHasBranchProtectedScope();
   unsigned NumCatchStmts = CatchStmts.size();
   return Owned(ObjCAtTryStmt::Create(Context, AtLoc, Try,
-                                     CatchStmts.release(),
+                                     CatchStmts.data(),
                                      NumCatchStmts,
                                      Finally));
 }
@@ -3239,7 +2707,7 @@ Sema::ActOnCXXTryBlock(SourceLocation TryLoc, Stmt *TryBlock,
   unsigned NumHandlers = RawHandlers.size();
   assert(NumHandlers > 0 &&
          "The parser shouldn't call this if there are no handlers.");
-  Stmt **Handlers = RawHandlers.get();
+  Stmt **Handlers = RawHandlers.data();
 
   SmallVector<TypeWithHandler, 8> TypesWithHandlers;
 
diff --git a/lib/Sema/SemaStmtAsm.cpp b/lib/Sema/SemaStmtAsm.cpp
new file mode 100644
index 000000000000..7c2c766e4615
--- /dev/null
+++ b/lib/Sema/SemaStmtAsm.cpp
@@ -0,0 +1,661 @@
+//===--- SemaStmtAsm.cpp - Semantic Analysis for Asm Statements -----------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+//  This file implements semantic analysis for inline asm statements.
+//
+//===----------------------------------------------------------------------===//
+
+#include "clang/Sema/SemaInternal.h"
+#include "clang/Sema/Scope.h"
+#include "clang/Sema/ScopeInfo.h"
+#include "clang/Sema/Initialization.h"
+#include "clang/Sema/Lookup.h"
+#include "clang/AST/RecordLayout.h"
+#include "clang/AST/TypeLoc.h"
+#include "clang/Lex/Preprocessor.h"
+#include "clang/Basic/TargetInfo.h"
+#include "llvm/ADT/ArrayRef.h"
+#include "llvm/ADT/BitVector.h"
+#include "llvm/ADT/SmallString.h"
+#include "llvm/MC/MCAsmInfo.h"
+#include "llvm/MC/MCContext.h"
+#include "llvm/MC/MCObjectFileInfo.h"
+#include "llvm/MC/MCRegisterInfo.h"
+#include "llvm/MC/MCStreamer.h"
+#include "llvm/MC/MCSubtargetInfo.h"
+#include "llvm/MC/MCTargetAsmParser.h"
+#include "llvm/MC/MCParser/MCAsmParser.h"
+#include "llvm/Support/SourceMgr.h"
+#include "llvm/Support/TargetRegistry.h"
+#include "llvm/Support/TargetSelect.h"
+using namespace clang;
+using namespace sema;
+
+/// CheckAsmLValue - GNU C has an extremely ugly extension whereby they silently
+/// ignore "noop" casts in places where an lvalue is required by an inline asm.
+/// We emulate this behavior when -fheinous-gnu-extensions is specified, but
+/// provide a strong guidance to not use it.
+///
+/// This method checks to see if the argument is an acceptable l-value and
+/// returns false if it is a case we can handle.
+static bool CheckAsmLValue(const Expr *E, Sema &S) {
+  // Type dependent expressions will be checked during instantiation.
+  if (E->isTypeDependent())
+    return false;
+
+  if (E->isLValue())
+    return false;  // Cool, this is an lvalue.
+
+  // Okay, this is not an lvalue, but perhaps it is the result of a cast that we
+  // are supposed to allow.
+  const Expr *E2 = E->IgnoreParenNoopCasts(S.Context);
+  if (E != E2 && E2->isLValue()) {
+    if (!S.getLangOpts().HeinousExtensions)
+      S.Diag(E2->getLocStart(), diag::err_invalid_asm_cast_lvalue)
+        << E->getSourceRange();
+    else
+      S.Diag(E2->getLocStart(), diag::warn_invalid_asm_cast_lvalue)
+        << E->getSourceRange();
+    // Accept, even if we emitted an error diagnostic.
+    return false;
+  }
+
+  // None of the above, just randomly invalid non-lvalue.
+  return true;
+}
+
+/// isOperandMentioned - Return true if the specified operand # is mentioned
+/// anywhere in the decomposed asm string.
+static bool isOperandMentioned(unsigned OpNo,
+                         ArrayRef<GCCAsmStmt::AsmStringPiece> AsmStrPieces) {
+  for (unsigned p = 0, e = AsmStrPieces.size(); p != e; ++p) {
+    const GCCAsmStmt::AsmStringPiece &Piece = AsmStrPieces[p];
+    if (!Piece.isOperand()) continue;
+
+    // If this is a reference to the input and if the input was the smaller
+    // one, then we have to reject this asm.
+    if (Piece.getOperandNo() == OpNo)
+      return true;
+  }
+  return false;
+}
+
+StmtResult Sema::ActOnGCCAsmStmt(SourceLocation AsmLoc, bool IsSimple,
+                                 bool IsVolatile, unsigned NumOutputs,
+                                 unsigned NumInputs, IdentifierInfo **Names,
+                                 MultiExprArg constraints, MultiExprArg exprs,
+                                 Expr *asmString, MultiExprArg clobbers,
+                                 SourceLocation RParenLoc) {
+  unsigned NumClobbers = clobbers.size();
+  StringLiteral **Constraints =
+    reinterpret_cast<StringLiteral**>(constraints.data());
+  Expr **Exprs = exprs.data();
+  StringLiteral *AsmString = cast<StringLiteral>(asmString);
+  StringLiteral **Clobbers = reinterpret_cast<StringLiteral**>(clobbers.data());
+
+  SmallVector<TargetInfo::ConstraintInfo, 4> OutputConstraintInfos;
+
+  // The parser verifies that there is a string literal here.
+  if (!AsmString->isAscii())
+    return StmtError(Diag(AsmString->getLocStart(),diag::err_asm_wide_character)
+      << AsmString->getSourceRange());
+
+  for (unsigned i = 0; i != NumOutputs; i++) {
+    StringLiteral *Literal = Constraints[i];
+    if (!Literal->isAscii())
+      return StmtError(Diag(Literal->getLocStart(),diag::err_asm_wide_character)
+        << Literal->getSourceRange());
+
+    StringRef OutputName;
+    if (Names[i])
+      OutputName = Names[i]->getName();
+
+    TargetInfo::ConstraintInfo Info(Literal->getString(), OutputName);
+    if (!Context.getTargetInfo().validateOutputConstraint(Info))
+      return StmtError(Diag(Literal->getLocStart(),
+                            diag::err_asm_invalid_output_constraint)
+                       << Info.getConstraintStr());
+
+    // Check that the output exprs are valid lvalues.
+    Expr *OutputExpr = Exprs[i];
+    if (CheckAsmLValue(OutputExpr, *this)) {
+      return StmtError(Diag(OutputExpr->getLocStart(),
+                  diag::err_asm_invalid_lvalue_in_output)
+        << OutputExpr->getSourceRange());
+    }
+
+    OutputConstraintInfos.push_back(Info);
+  }
+
+  SmallVector<TargetInfo::ConstraintInfo, 4> InputConstraintInfos;
+
+  for (unsigned i = NumOutputs, e = NumOutputs + NumInputs; i != e; i++) {
+    StringLiteral *Literal = Constraints[i];
+    if (!Literal->isAscii())
+      return StmtError(Diag(Literal->getLocStart(),diag::err_asm_wide_character)
+        << Literal->getSourceRange());
+
+    StringRef InputName;
+    if (Names[i])
+      InputName = Names[i]->getName();
+
+    TargetInfo::ConstraintInfo Info(Literal->getString(), InputName);
+    if (!Context.getTargetInfo().validateInputConstraint(OutputConstraintInfos.data(),
+                                                NumOutputs, Info)) {
+      return StmtError(Diag(Literal->getLocStart(),
+                            diag::err_asm_invalid_input_constraint)
+                       << Info.getConstraintStr());
+    }
+
+    Expr *InputExpr = Exprs[i];
+
+    // Only allow void types for memory constraints.
+    if (Info.allowsMemory() && !Info.allowsRegister()) {
+      if (CheckAsmLValue(InputExpr, *this))
+        return StmtError(Diag(InputExpr->getLocStart(),
+                              diag::err_asm_invalid_lvalue_in_input)
+                         << Info.getConstraintStr()
+                         << InputExpr->getSourceRange());
+    }
+
+    if (Info.allowsRegister()) {
+      if (InputExpr->getType()->isVoidType()) {
+        return StmtError(Diag(InputExpr->getLocStart(),
+                              diag::err_asm_invalid_type_in_input)
+          << InputExpr->getType() << Info.getConstraintStr()
+          << InputExpr->getSourceRange());
+      }
+    }
+
+    ExprResult Result = DefaultFunctionArrayLvalueConversion(Exprs[i]);
+    if (Result.isInvalid())
+      return StmtError();
+
+    Exprs[i] = Result.take();
+    InputConstraintInfos.push_back(Info);
+  }
+
+  // Check that the clobbers are valid.
+  for (unsigned i = 0; i != NumClobbers; i++) {
+    StringLiteral *Literal = Clobbers[i];
+    if (!Literal->isAscii())
+      return StmtError(Diag(Literal->getLocStart(),diag::err_asm_wide_character)
+        << Literal->getSourceRange());
+
+    StringRef Clobber = Literal->getString();
+
+    if (!Context.getTargetInfo().isValidClobber(Clobber))
+      return StmtError(Diag(Literal->getLocStart(),
+                  diag::err_asm_unknown_register_name) << Clobber);
+  }
+
+  GCCAsmStmt *NS =
+    new (Context) GCCAsmStmt(Context, AsmLoc, IsSimple, IsVolatile, NumOutputs,
+                             NumInputs, Names, Constraints, Exprs, AsmString,
+                             NumClobbers, Clobbers, RParenLoc);
+  // Validate the asm string, ensuring it makes sense given the operands we
+  // have.
+  SmallVector<GCCAsmStmt::AsmStringPiece, 8> Pieces;
+  unsigned DiagOffs;
+  if (unsigned DiagID = NS->AnalyzeAsmString(Pieces, Context, DiagOffs)) {
+    Diag(getLocationOfStringLiteralByte(AsmString, DiagOffs), DiagID)
+           << AsmString->getSourceRange();
+    return StmtError();
+  }
+
+  // Validate constraints and modifiers.
+  for (unsigned i = 0, e = Pieces.size(); i != e; ++i) {
+    GCCAsmStmt::AsmStringPiece &Piece = Pieces[i];
+    if (!Piece.isOperand()) continue;
+
+    // Look for the correct constraint index.
+    unsigned Idx = 0;
+    unsigned ConstraintIdx = 0;
+    for (unsigned i = 0, e = NS->getNumOutputs(); i != e; ++i, ++ConstraintIdx) {
+      TargetInfo::ConstraintInfo &Info = OutputConstraintInfos[i];
+      if (Idx == Piece.getOperandNo())
+        break;
+      ++Idx;
+
+      if (Info.isReadWrite()) {
+        if (Idx == Piece.getOperandNo())
+          break;
+        ++Idx;
+      }
+    }
+
+    for (unsigned i = 0, e = NS->getNumInputs(); i != e; ++i, ++ConstraintIdx) {
+      TargetInfo::ConstraintInfo &Info = InputConstraintInfos[i];
+      if (Idx == Piece.getOperandNo())
+        break;
+      ++Idx;
+
+      if (Info.isReadWrite()) {
+        if (Idx == Piece.getOperandNo())
+          break;
+        ++Idx;
+      }
+    }
+
+    // Now that we have the right indexes go ahead and check.
+    StringLiteral *Literal = Constraints[ConstraintIdx];
+    const Type *Ty = Exprs[ConstraintIdx]->getType().getTypePtr();
+    if (Ty->isDependentType() || Ty->isIncompleteType())
+      continue;
+
+    unsigned Size = Context.getTypeSize(Ty);
+    if (!Context.getTargetInfo()
+          .validateConstraintModifier(Literal->getString(), Piece.getModifier(),
+                                      Size))
+      Diag(Exprs[ConstraintIdx]->getLocStart(),
+           diag::warn_asm_mismatched_size_modifier);
+  }
+
+  // Validate tied input operands for type mismatches.
+  for (unsigned i = 0, e = InputConstraintInfos.size(); i != e; ++i) {
+    TargetInfo::ConstraintInfo &Info = InputConstraintInfos[i];
+
+    // If this is a tied constraint, verify that the output and input have
+    // either exactly the same type, or that they are int/ptr operands with the
+    // same size (int/long, int*/long, are ok etc).
+    if (!Info.hasTiedOperand()) continue;
+
+    unsigned TiedTo = Info.getTiedOperand();
+    unsigned InputOpNo = i+NumOutputs;
+    Expr *OutputExpr = Exprs[TiedTo];
+    Expr *InputExpr = Exprs[InputOpNo];
+
+    if (OutputExpr->isTypeDependent() || InputExpr->isTypeDependent())
+      continue;
+
+    QualType InTy = InputExpr->getType();
+    QualType OutTy = OutputExpr->getType();
+    if (Context.hasSameType(InTy, OutTy))
+      continue;  // All types can be tied to themselves.
+
+    // Decide if the input and output are in the same domain (integer/ptr or
+    // floating point.
+    enum AsmDomain {
+      AD_Int, AD_FP, AD_Other
+    } InputDomain, OutputDomain;
+
+    if (InTy->isIntegerType() || InTy->isPointerType())
+      InputDomain = AD_Int;
+    else if (InTy->isRealFloatingType())
+      InputDomain = AD_FP;
+    else
+      InputDomain = AD_Other;
+
+    if (OutTy->isIntegerType() || OutTy->isPointerType())
+      OutputDomain = AD_Int;
+    else if (OutTy->isRealFloatingType())
+      OutputDomain = AD_FP;
+    else
+      OutputDomain = AD_Other;
+
+    // They are ok if they are the same size and in the same domain.  This
+    // allows tying things like:
+    //   void* to int*
+    //   void* to int            if they are the same size.
+    //   double to long double   if they are the same size.
+    //
+    uint64_t OutSize = Context.getTypeSize(OutTy);
+    uint64_t InSize = Context.getTypeSize(InTy);
+    if (OutSize == InSize && InputDomain == OutputDomain &&
+        InputDomain != AD_Other)
+      continue;
+
+    // If the smaller input/output operand is not mentioned in the asm string,
+    // then we can promote the smaller one to a larger input and the asm string
+    // won't notice.
+    bool SmallerValueMentioned = false;
+
+    // If this is a reference to the input and if the input was the smaller
+    // one, then we have to reject this asm.
+    if (isOperandMentioned(InputOpNo, Pieces)) {
+      // This is a use in the asm string of the smaller operand.  Since we
+      // codegen this by promoting to a wider value, the asm will get printed
+      // "wrong".
+      SmallerValueMentioned |= InSize < OutSize;
+    }
+    if (isOperandMentioned(TiedTo, Pieces)) {
+      // If this is a reference to the output, and if the output is the larger
+      // value, then it's ok because we'll promote the input to the larger type.
+      SmallerValueMentioned |= OutSize < InSize;
+    }
+
+    // If the smaller value wasn't mentioned in the asm string, and if the
+    // output was a register, just extend the shorter one to the size of the
+    // larger one.
+    if (!SmallerValueMentioned && InputDomain != AD_Other &&
+        OutputConstraintInfos[TiedTo].allowsRegister())
+      continue;
+
+    // Either both of the operands were mentioned or the smaller one was
+    // mentioned.  One more special case that we'll allow: if the tied input is
+    // integer, unmentioned, and is a constant, then we'll allow truncating it
+    // down to the size of the destination.
+    if (InputDomain == AD_Int && OutputDomain == AD_Int &&
+        !isOperandMentioned(InputOpNo, Pieces) &&
+        InputExpr->isEvaluatable(Context)) {
+      CastKind castKind =
+        (OutTy->isBooleanType() ? CK_IntegralToBoolean : CK_IntegralCast);
+      InputExpr = ImpCastExprToType(InputExpr, OutTy, castKind).take();
+      Exprs[InputOpNo] = InputExpr;
+      NS->setInputExpr(i, InputExpr);
+      continue;
+    }
+
+    Diag(InputExpr->getLocStart(),
+         diag::err_asm_tying_incompatible_types)
+      << InTy << OutTy << OutputExpr->getSourceRange()
+      << InputExpr->getSourceRange();
+    return StmtError();
+  }
+
+  return Owned(NS);
+}
+
+// getSpelling - Get the spelling of the AsmTok token.
+static StringRef getSpelling(Sema &SemaRef, Token AsmTok) {
+  StringRef Asm;
+  SmallString<512> TokenBuf;
+  TokenBuf.resize(512);
+  bool StringInvalid = false;
+  Asm = SemaRef.PP.getSpelling(AsmTok, TokenBuf, &StringInvalid);
+  assert (!StringInvalid && "Expected valid string!");
+  return Asm;
+}
+
+// Build the inline assembly string.  Returns true on error.
+static bool buildMSAsmString(Sema &SemaRef,
+                             SourceLocation AsmLoc,
+                             ArrayRef<Token> AsmToks,
+                             llvm::SmallVectorImpl<unsigned> &TokOffsets,
+                             std::string &AsmString) {
+  assert (!AsmToks.empty() && "Didn't expect an empty AsmToks!");
+
+  SmallString<512> Asm;
+  for (unsigned i = 0, e = AsmToks.size(); i < e; ++i) {
+    bool isNewAsm = ((i == 0) ||
+                     AsmToks[i].isAtStartOfLine() ||
+                     AsmToks[i].is(tok::kw_asm));
+    if (isNewAsm) {
+      if (i != 0)
+        Asm += "\n\t";
+
+      if (AsmToks[i].is(tok::kw_asm)) {
+        i++; // Skip __asm
+        if (i == e) {
+          SemaRef.Diag(AsmLoc, diag::err_asm_empty);
+          return true;
+        }
+
+      }
+    }
+
+    if (i && AsmToks[i].hasLeadingSpace() && !isNewAsm)
+      Asm += ' ';
+
+    StringRef Spelling = getSpelling(SemaRef, AsmToks[i]);
+    Asm += Spelling;
+    TokOffsets.push_back(Asm.size());
+  }
+  AsmString = Asm.str();
+  return false;
+}
+
+namespace {
+
+class MCAsmParserSemaCallbackImpl : public llvm::MCAsmParserSemaCallback {
+  Sema &SemaRef;
+  SourceLocation AsmLoc;
+  ArrayRef<Token> AsmToks;
+  ArrayRef<unsigned> TokOffsets;
+
+public:
+  MCAsmParserSemaCallbackImpl(Sema &Ref, SourceLocation Loc,
+                              ArrayRef<Token> Toks,
+                              ArrayRef<unsigned> Offsets)
+    : SemaRef(Ref), AsmLoc(Loc), AsmToks(Toks), TokOffsets(Offsets) { }
+  ~MCAsmParserSemaCallbackImpl() {}
+
+  void *LookupInlineAsmIdentifier(StringRef Name, void *SrcLoc, unsigned &Size){
+    SourceLocation Loc = SourceLocation::getFromPtrEncoding(SrcLoc);
+    NamedDecl *OpDecl = SemaRef.LookupInlineAsmIdentifier(Name, Loc, Size);
+    return static_cast<void *>(OpDecl);
+  }
+
+  bool LookupInlineAsmField(StringRef Base, StringRef Member,
+                            unsigned &Offset) {
+    return SemaRef.LookupInlineAsmField(Base, Member, Offset, AsmLoc);
+  }
+
+  static void MSAsmDiagHandlerCallback(const llvm::SMDiagnostic &D,
+                                       void *Context) {
+    ((MCAsmParserSemaCallbackImpl*)Context)->MSAsmDiagHandler(D);
+  }
+  void MSAsmDiagHandler(const llvm::SMDiagnostic &D) {
+    // Compute an offset into the inline asm buffer.
+    // FIXME: This isn't right if .macro is involved (but hopefully, no
+    // real-world code does that).
+    const llvm::SourceMgr &LSM = *D.getSourceMgr();
+    const llvm::MemoryBuffer *LBuf =
+    LSM.getMemoryBuffer(LSM.FindBufferContainingLoc(D.getLoc()));
+    unsigned Offset = D.getLoc().getPointer()  - LBuf->getBufferStart();
+
+    // Figure out which token that offset points into.
+    const unsigned *OffsetPtr =
+        std::lower_bound(TokOffsets.begin(), TokOffsets.end(), Offset);
+    unsigned TokIndex = OffsetPtr - TokOffsets.begin();
+
+    // If we come up with an answer which seems sane, use it; otherwise,
+    // just point at the __asm keyword.
+    // FIXME: Assert the answer is sane once we handle .macro correctly.
+    SourceLocation Loc = AsmLoc;
+    if (TokIndex < AsmToks.size()) {
+      const Token *Tok = &AsmToks[TokIndex];
+      Loc = Tok->getLocation();
+      Loc = Loc.getLocWithOffset(Offset - (*OffsetPtr - Tok->getLength()));
+    }
+    SemaRef.Diag(Loc, diag::err_inline_ms_asm_parsing) << D.getMessage();
+  }
+};
+
+}
+
+NamedDecl *Sema::LookupInlineAsmIdentifier(StringRef Name, SourceLocation Loc,
+                                           unsigned &Size) {
+  Size = 0;
+  LookupResult Result(*this, &Context.Idents.get(Name), Loc,
+                      Sema::LookupOrdinaryName);
+
+  if (!LookupName(Result, getCurScope())) {
+    // If we don't find anything, return null; the AsmParser will assume
+    // it is a label of some sort.
+    return 0;
+  }
+
+  if (!Result.isSingleResult()) {
+    // FIXME: Diagnose result.
+    return 0;
+  }
+
+  NamedDecl *ND = Result.getFoundDecl();
+  if (isa<VarDecl>(ND) || isa<FunctionDecl>(ND)) {
+    if (VarDecl *Var = dyn_cast<VarDecl>(ND))
+      Size = Context.getTypeInfo(Var->getType()).first;
+
+    return ND;
+  }
+
+  // FIXME: Handle other kinds of results? (FieldDecl, etc.)
+  // FIXME: Diagnose if we find something we can't handle, like a typedef.
+  return 0;
+}
+
+bool Sema::LookupInlineAsmField(StringRef Base, StringRef Member,
+                                unsigned &Offset, SourceLocation AsmLoc) {
+  Offset = 0;
+  LookupResult BaseResult(*this, &Context.Idents.get(Base), SourceLocation(),
+                          LookupOrdinaryName);
+
+  if (!LookupName(BaseResult, getCurScope()))
+    return true;
+
+  if (!BaseResult.isSingleResult())
+    return true;
+
+  NamedDecl *FoundDecl = BaseResult.getFoundDecl();
+  const RecordType *RT = 0;
+  if (VarDecl *VD = dyn_cast<VarDecl>(FoundDecl)) {
+    RT = VD->getType()->getAs<RecordType>();
+  } else if (TypedefDecl *TD = dyn_cast<TypedefDecl>(FoundDecl)) {
+    RT = TD->getUnderlyingType()->getAs<RecordType>();
+  }
+  if (!RT)
+    return true;
+
+  if (RequireCompleteType(AsmLoc, QualType(RT, 0), 0))
+    return true;
+
+  LookupResult FieldResult(*this, &Context.Idents.get(Member), SourceLocation(),
+                           LookupMemberName);
+
+  if (!LookupQualifiedName(FieldResult, RT->getDecl()))
+    return true;
+
+  // FIXME: Handle IndirectFieldDecl?
+  FieldDecl *FD = dyn_cast<FieldDecl>(FieldResult.getFoundDecl());
+  if (!FD)
+    return true;
+
+  const ASTRecordLayout &RL = Context.getASTRecordLayout(RT->getDecl());
+  unsigned i = FD->getFieldIndex();
+  CharUnits Result = Context.toCharUnitsFromBits(RL.getFieldOffset(i));
+  Offset = (unsigned)Result.getQuantity();
+
+  return false;
+}
+
+StmtResult Sema::ActOnMSAsmStmt(SourceLocation AsmLoc, SourceLocation LBraceLoc,
+                                ArrayRef<Token> AsmToks,SourceLocation EndLoc) {
+  SmallVector<IdentifierInfo*, 4> Names;
+  SmallVector<StringRef, 4> ConstraintRefs;
+  SmallVector<Expr*, 4> Exprs;
+  SmallVector<StringRef, 4> ClobberRefs;
+
+  // Empty asm statements don't need to instantiate the AsmParser, etc.
+  if (AsmToks.empty()) {
+    StringRef EmptyAsmStr;
+    MSAsmStmt *NS =
+      new (Context) MSAsmStmt(Context, AsmLoc, LBraceLoc, /*IsSimple*/ true,
+                              /*IsVolatile*/ true, AsmToks, /*NumOutputs*/ 0,
+                              /*NumInputs*/ 0, Names, ConstraintRefs, Exprs,
+                              EmptyAsmStr, ClobberRefs, EndLoc);
+    return Owned(NS);
+  }
+
+  std::string AsmString;
+  llvm::SmallVector<unsigned, 8> TokOffsets;
+  if (buildMSAsmString(*this, AsmLoc, AsmToks, TokOffsets, AsmString))
+    return StmtError();
+
+  // Get the target specific parser.
+  std::string Error;
+  const std::string &TT = Context.getTargetInfo().getTriple().getTriple();
+  const llvm::Target *TheTarget(llvm::TargetRegistry::lookupTarget(TT, Error));
+
+  OwningPtr<llvm::MCAsmInfo> MAI(TheTarget->createMCAsmInfo(TT));
+  OwningPtr<llvm::MCRegisterInfo> MRI(TheTarget->createMCRegInfo(TT));
+  OwningPtr<llvm::MCObjectFileInfo> MOFI(new llvm::MCObjectFileInfo());
+  OwningPtr<llvm::MCSubtargetInfo>
+    STI(TheTarget->createMCSubtargetInfo(TT, "", ""));
+
+  llvm::SourceMgr SrcMgr;
+  llvm::MCContext Ctx(*MAI, *MRI, MOFI.get(), &SrcMgr);
+  llvm::MemoryBuffer *Buffer =
+    llvm::MemoryBuffer::getMemBuffer(AsmString, "<inline asm>");
+
+  // Tell SrcMgr about this buffer, which is what the parser will pick up.
+  SrcMgr.AddNewSourceBuffer(Buffer, llvm::SMLoc());
+
+  OwningPtr<llvm::MCStreamer> Str(createNullStreamer(Ctx));
+  OwningPtr<llvm::MCAsmParser>
+    Parser(createMCAsmParser(SrcMgr, Ctx, *Str.get(), *MAI));
+  OwningPtr<llvm::MCTargetAsmParser>
+    TargetParser(TheTarget->createMCAsmParser(*STI, *Parser));
+
+  // Get the instruction descriptor.
+  const llvm::MCInstrInfo *MII = TheTarget->createMCInstrInfo(); 
+  llvm::MCInstPrinter *IP =
+    TheTarget->createMCInstPrinter(1, *MAI, *MII, *MRI, *STI);
+
+  // Change to the Intel dialect.
+  Parser->setAssemblerDialect(1);
+  Parser->setTargetParser(*TargetParser.get());
+  Parser->setParsingInlineAsm(true);
+  TargetParser->setParsingInlineAsm(true);
+
+  MCAsmParserSemaCallbackImpl MCAPSI(*this, AsmLoc, AsmToks, TokOffsets);
+  TargetParser->setSemaCallback(&MCAPSI);
+  SrcMgr.setDiagHandler(MCAsmParserSemaCallbackImpl::MSAsmDiagHandlerCallback,
+                        &MCAPSI);
+
+  unsigned NumOutputs;
+  unsigned NumInputs;
+  std::string AsmStringIR;
+  SmallVector<std::pair<void *, bool>, 4> OpDecls;
+  SmallVector<std::string, 4> Constraints;
+  SmallVector<std::string, 4> Clobbers;
+  if (Parser->ParseMSInlineAsm(AsmLoc.getPtrEncoding(), AsmStringIR,
+                               NumOutputs, NumInputs, OpDecls, Constraints,
+                               Clobbers, MII, IP, MCAPSI))
+    return StmtError();
+
+  // Build the vector of clobber StringRefs.
+  unsigned NumClobbers = Clobbers.size();
+  ClobberRefs.resize(NumClobbers);
+  for (unsigned i = 0; i != NumClobbers; ++i)
+    ClobberRefs[i] = StringRef(Clobbers[i]);
+
+  // Recast the void pointers and build the vector of constraint StringRefs.
+  unsigned NumExprs = NumOutputs + NumInputs;
+  Names.resize(NumExprs);
+  ConstraintRefs.resize(NumExprs);
+  Exprs.resize(NumExprs);
+  for (unsigned i = 0, e = NumExprs; i != e; ++i) {
+    NamedDecl *OpDecl = static_cast<NamedDecl *>(OpDecls[i].first);
+    if (!OpDecl)
+      return StmtError();
+
+    DeclarationNameInfo NameInfo(OpDecl->getDeclName(), AsmLoc);
+    ExprResult OpExpr = BuildDeclarationNameExpr(CXXScopeSpec(), NameInfo,
+                                                 OpDecl);
+    if (OpExpr.isInvalid())
+      return StmtError();
+
+    // Need offset of variable.
+    if (OpDecls[i].second)
+      OpExpr = BuildUnaryOp(getCurScope(), AsmLoc, clang::UO_AddrOf,
+                            OpExpr.take());
+
+    Names[i] = OpDecl->getIdentifier();
+    ConstraintRefs[i] = StringRef(Constraints[i]);
+    Exprs[i] = OpExpr.take();
+  }
+
+  bool IsSimple = NumExprs > 0;
+  MSAsmStmt *NS =
+    new (Context) MSAsmStmt(Context, AsmLoc, LBraceLoc, IsSimple,
+                            /*IsVolatile*/ true, AsmToks, NumOutputs, NumInputs,
+                            Names, ConstraintRefs, Exprs, AsmStringIR,
+                            ClobberRefs, EndLoc);
+  return Owned(NS);
+}
diff --git a/lib/Sema/SemaStmtAttr.cpp b/lib/Sema/SemaStmtAttr.cpp
index 3c15b7a8afad..b268b4502c4f 100644
--- a/lib/Sema/SemaStmtAttr.cpp
+++ b/lib/Sema/SemaStmtAttr.cpp
@@ -48,11 +48,16 @@ static Attr *handleFallThroughAttr(Sema &S, Stmt *St, const AttributeList &A,
 static Attr *ProcessStmtAttribute(Sema &S, Stmt *St, const AttributeList &A,
                                   SourceRange Range) {
   switch (A.getKind()) {
+  case AttributeList::UnknownAttribute:
+    S.Diag(A.getLoc(), A.isDeclspecAttribute() ?
+           diag::warn_unhandled_ms_attribute_ignored :
+           diag::warn_unknown_attribute_ignored) << A.getName();
+    return 0;
   case AttributeList::AT_FallThrough:
     return handleFallThroughAttr(S, St, A, Range);
   default:
-    // if we're here, then we parsed an attribute, but didn't recognize it as a
-    // statement attribute => it is declaration attribute
+    // if we're here, then we parsed a known attribute, but didn't recognize
+    // it as a statement attribute => it is declaration attribute
     S.Diag(A.getRange().getBegin(), diag::warn_attribute_invalid_on_stmt)
         << A.getName()->getName() << St->getLocStart();
     return 0;
diff --git a/lib/Sema/SemaTemplate.cpp b/lib/Sema/SemaTemplate.cpp
index 4dbf3e45b387..f56b05406d07 100644
--- a/lib/Sema/SemaTemplate.cpp
+++ b/lib/Sema/SemaTemplate.cpp
@@ -333,7 +333,8 @@ void Sema::LookupTemplateName(LookupResult &Found,
         if (LookupCtx)
           Diag(Found.getNameLoc(), diag::err_no_member_template_suggest)
             << Name << LookupCtx << CorrectedQuotedStr << SS.getRange()
-            << FixItHint::CreateReplacement(Found.getNameLoc(), CorrectedStr);
+            << FixItHint::CreateReplacement(Corrected.getCorrectionRange(),
+                                            CorrectedStr);
         else
           Diag(Found.getNameLoc(), diag::err_no_template_suggest)
             << Name << CorrectedQuotedStr
@@ -1104,6 +1105,9 @@ Sema::CheckClassTemplate(Scope *S, unsigned TagSpec, TagUseKind TUK,
   if (Attr)
     ProcessDeclAttributeList(S, NewClass, Attr);
 
+  if (PrevClassTemplate)
+    mergeDeclAttributes(NewClass, PrevClassTemplate->getTemplatedDecl());
+
   AddPushedVisibilityAttribute(NewClass);
 
   if (TUK != TUK_Friend)
@@ -1138,8 +1142,6 @@ Sema::CheckClassTemplate(Scope *S, unsigned TagSpec, TagUseKind TUK,
     NewTemplate->setInvalidDecl();
     NewClass->setInvalidDecl();
   }
-  if (PrevClassTemplate)
-    mergeDeclAttributes(NewClass, PrevClassTemplate->getTemplatedDecl());
 
   ActOnDocumentableDecl(NewTemplate);
 
@@ -1204,11 +1206,17 @@ static bool DiagnoseDefaultTemplateArgument(Sema &S,
 /// of a template template parameter, recursively.
 static bool DiagnoseUnexpandedParameterPacks(Sema &S,
                                              TemplateTemplateParmDecl *TTP) {
+  // A template template parameter which is a parameter pack is also a pack
+  // expansion.
+  if (TTP->isParameterPack())
+    return false;
+
   TemplateParameterList *Params = TTP->getTemplateParameters();
   for (unsigned I = 0, N = Params->size(); I != N; ++I) {
     NamedDecl *P = Params->getParam(I);
     if (NonTypeTemplateParmDecl *NTTP = dyn_cast<NonTypeTemplateParmDecl>(P)) {
-      if (S.DiagnoseUnexpandedParameterPack(NTTP->getLocation(),
+      if (!NTTP->isParameterPack() &&
+          S.DiagnoseUnexpandedParameterPack(NTTP->getLocation(),
                                             NTTP->getTypeSourceInfo(),
                                       Sema::UPPC_NonTypeTemplateParameterType))
         return true;
@@ -1321,7 +1329,8 @@ bool Sema::CheckTemplateParameterList(TemplateParameterList *NewParams,
     } else if (NonTypeTemplateParmDecl *NewNonTypeParm
                = dyn_cast<NonTypeTemplateParmDecl>(*NewParam)) {
       // Check for unexpanded parameter packs.
-      if (DiagnoseUnexpandedParameterPack(NewNonTypeParm->getLocation(),
+      if (!NewNonTypeParm->isParameterPack() &&
+          DiagnoseUnexpandedParameterPack(NewNonTypeParm->getLocation(),
                                           NewNonTypeParm->getTypeSourceInfo(),
                                           UPPC_NonTypeTemplateParameterType)) {
         Invalid = true;
@@ -1342,7 +1351,8 @@ bool Sema::CheckTemplateParameterList(TemplateParameterList *NewParams,
       if (NewNonTypeParm->isParameterPack()) {
         assert(!NewNonTypeParm->hasDefaultArgument() &&
                "Parameter packs can't have a default argument!");
-        SawParameterPack = true;
+        if (!NewNonTypeParm->isPackExpansion())
+          SawParameterPack = true;
       } else if (OldNonTypeParm && OldNonTypeParm->hasDefaultArgument() &&
           NewNonTypeParm->hasDefaultArgument()) {
         OldDefaultLoc = OldNonTypeParm->getDefaultArgumentLoc();
@@ -1389,7 +1399,8 @@ bool Sema::CheckTemplateParameterList(TemplateParameterList *NewParams,
       if (NewTemplateParm->isParameterPack()) {
         assert(!NewTemplateParm->hasDefaultArgument() &&
                "Parameter packs can't have a default argument!");
-        SawParameterPack = true;
+        if (!NewTemplateParm->isPackExpansion())
+          SawParameterPack = true;
       } else if (OldTemplateParm && OldTemplateParm->hasDefaultArgument() &&
           NewTemplateParm->hasDefaultArgument()) {
         OldDefaultLoc = OldTemplateParm->getDefaultArgument().getLocation();
@@ -1416,10 +1427,10 @@ bool Sema::CheckTemplateParameterList(TemplateParameterList *NewParams,
         MissingDefaultArg = true;
     }
 
-    // C++0x [temp.param]p11:
+    // C++11 [temp.param]p11:
     //   If a template parameter of a primary class template or alias template
     //   is a template parameter pack, it shall be the last template parameter.
-    if (SawParameterPack && (NewParam + 1) != NewParamEnd && 
+    if (SawParameterPack && (NewParam + 1) != NewParamEnd &&
         (TPC == TPC_ClassTemplate || TPC == TPC_TypeAliasTemplate)) {
       Diag((*NewParam)->getLocation(),
            diag::err_template_param_pack_must_be_last_template_parameter);
@@ -1998,9 +2009,11 @@ QualType Sema::CheckTemplateIdType(TemplateName Name,
     for (unsigned I = 0; I < Depth; ++I)
       TemplateArgLists.addOuterTemplateArguments(0, 0);
 
+    LocalInstantiationScope Scope(*this);
     InstantiatingTemplate Inst(*this, TemplateLoc, Template);
     if (Inst)
       return QualType();
+
     CanonType = SubstType(Pattern->getUnderlyingType(),
                           TemplateArgLists, AliasTemplate->getLocation(),
                           AliasTemplate->getDeclName());
@@ -2085,7 +2098,8 @@ QualType Sema::CheckTemplateIdType(TemplateName Name,
                                                      Converted.data(),
                                                      Converted.size(), 0);
       ClassTemplate->AddSpecialization(Decl, InsertPos);
-      Decl->setLexicalDeclContext(CurContext);
+      if (ClassTemplate->isOutOfLine())
+        Decl->setLexicalDeclContext(ClassTemplate->getLexicalDeclContext());
     }
 
     CanonType = Context.getTypeDeclType(Decl);
@@ -2137,7 +2151,6 @@ Sema::ActOnTemplateIdType(CXXScopeSpec &SS, SourceLocation TemplateKWLoc,
   }
   
   QualType Result = CheckTemplateIdType(Template, TemplateLoc, TemplateArgs);
-  TemplateArgsIn.release();
 
   if (Result.isNull())
     return true;
@@ -2831,6 +2844,7 @@ bool Sema::CheckTemplateArgument(NamedDecl *Param,
 
     case TemplateArgument::Declaration:
     case TemplateArgument::Integral:
+    case TemplateArgument::NullPtr:
       // We've already checked this template argument, so just copy
       // it to the list of converted arguments.
       Converted.push_back(Arg.getArgument());
@@ -2947,7 +2961,7 @@ bool Sema::CheckTemplateArgument(NamedDecl *Param,
 
   case TemplateArgument::Template:
   case TemplateArgument::TemplateExpansion:
-    if (CheckTemplateArgument(TempParm, Arg))
+    if (CheckTemplateArgument(TempParm, Arg, ArgumentPackIndex))
       return true;
 
     Converted.push_back(Arg.getArgument());
@@ -2965,6 +2979,8 @@ bool Sema::CheckTemplateArgument(NamedDecl *Param,
     llvm_unreachable("Declaration argument with template template parameter");
   case TemplateArgument::Integral:
     llvm_unreachable("Integral argument with template template parameter");
+  case TemplateArgument::NullPtr:
+    llvm_unreachable("Null pointer argument with template template parameter");
 
   case TemplateArgument::Pack:
     llvm_unreachable("Caller must expand template argument packs");
@@ -2996,6 +3012,33 @@ static bool diagnoseArityMismatch(Sema &S, TemplateDecl *Template,
   return true;
 }
 
+/// \brief Check whether the template parameter is a pack expansion, and if so,
+/// determine the number of parameters produced by that expansion. For instance:
+///
+/// \code
+/// template<typename ...Ts> struct A {
+///   template<Ts ...NTs, template<Ts> class ...TTs, typename ...Us> struct B;
+/// };
+/// \endcode
+///
+/// In \c A<int,int>::B, \c NTs and \c TTs have expanded pack size 2, and \c Us
+/// is not a pack expansion, so returns an empty Optional.
+static llvm::Optional<unsigned> getExpandedPackSize(NamedDecl *Param) {
+  if (NonTypeTemplateParmDecl *NTTP
+        = dyn_cast<NonTypeTemplateParmDecl>(Param)) {
+    if (NTTP->isExpandedParameterPack())
+      return NTTP->getNumExpansionTypes();
+  }
+
+  if (TemplateTemplateParmDecl *TTP
+        = dyn_cast<TemplateTemplateParmDecl>(Param)) {
+    if (TTP->isExpandedParameterPack())
+      return TTP->getNumExpansionTemplateParameters();
+  }
+
+  return llvm::Optional<unsigned>();
+}
+
 /// \brief Check that the given template argument list is well-formed
 /// for specializing the given template.
 bool Sema::CheckTemplateArgumentList(TemplateDecl *Template,
@@ -3008,15 +3051,9 @@ bool Sema::CheckTemplateArgumentList(TemplateDecl *Template,
     *ExpansionIntoFixedList = false;
 
   TemplateParameterList *Params = Template->getTemplateParameters();
-  unsigned NumParams = Params->size();
-  unsigned NumArgs = TemplateArgs.size();
-  bool Invalid = false;
 
   SourceLocation RAngleLoc = TemplateArgs.getRAngleLoc();
 
-  bool HasParameterPack =
-    NumParams > 0 && Params->getParam(NumParams - 1)->isTemplateParameterPack();
-  
   // C++ [temp.arg]p1:
   //   [...] The type and form of each template-argument specified in
   //   a template-id shall match the type and form specified for the
@@ -3024,38 +3061,50 @@ bool Sema::CheckTemplateArgumentList(TemplateDecl *Template,
   //   template-parameter-list.
   bool isTemplateTemplateParameter = isa<TemplateTemplateParmDecl>(Template);
   SmallVector<TemplateArgument, 2> ArgumentPack;
-  TemplateParameterList::iterator Param = Params->begin(),
-                               ParamEnd = Params->end();
-  unsigned ArgIdx = 0;
+  unsigned ArgIdx = 0, NumArgs = TemplateArgs.size();
   LocalInstantiationScope InstScope(*this, true);
-  bool SawPackExpansion = false;
-  while (Param != ParamEnd) {
-    if (ArgIdx < NumArgs) {
-      // If we have an expanded parameter pack, make sure we don't have too
-      // many arguments.
-      // FIXME: This really should fall out from the normal arity checking.
-      if (NonTypeTemplateParmDecl *NTTP
-                                = dyn_cast<NonTypeTemplateParmDecl>(*Param)) {
-        if (NTTP->isExpandedParameterPack() &&
-            ArgumentPack.size() >= NTTP->getNumExpansionTypes()) {
-          Diag(TemplateLoc, diag::err_template_arg_list_different_arity)
-            << true
-            << (isa<ClassTemplateDecl>(Template)? 0 :
-                isa<FunctionTemplateDecl>(Template)? 1 :
-                isa<TemplateTemplateParmDecl>(Template)? 2 : 3)
-            << Template;
-          Diag(Template->getLocation(), diag::note_template_decl_here)
-            << Params->getSourceRange();
-          return true;
-        }
+  for (TemplateParameterList::iterator Param = Params->begin(),
+                                       ParamEnd = Params->end();
+       Param != ParamEnd; /* increment in loop */) {
+    // If we have an expanded parameter pack, make sure we don't have too
+    // many arguments.
+    if (llvm::Optional<unsigned> Expansions = getExpandedPackSize(*Param)) {
+      if (*Expansions == ArgumentPack.size()) {
+        // We're done with this parameter pack. Pack up its arguments and add
+        // them to the list.
+        Converted.push_back(
+          TemplateArgument::CreatePackCopy(Context,
+                                           ArgumentPack.data(),
+                                           ArgumentPack.size()));
+        ArgumentPack.clear();
+
+        // This argument is assigned to the next parameter.
+        ++Param;
+        continue;
+      } else if (ArgIdx == NumArgs && !PartialTemplateArgs) {
+        // Not enough arguments for this parameter pack.
+        Diag(TemplateLoc, diag::err_template_arg_list_different_arity)
+          << false
+          << (isa<ClassTemplateDecl>(Template)? 0 :
+              isa<FunctionTemplateDecl>(Template)? 1 :
+              isa<TemplateTemplateParmDecl>(Template)? 2 : 3)
+          << Template;
+        Diag(Template->getLocation(), diag::note_template_decl_here)
+          << Params->getSourceRange();
+        return true;
       }
+    }
 
+    if (ArgIdx < NumArgs) {
       // Check the template argument we were given.
       if (CheckTemplateArgument(*Param, TemplateArgs[ArgIdx], Template,
                                 TemplateLoc, RAngleLoc,
                                 ArgumentPack.size(), Converted))
         return true;
 
+      // We're now done with this argument.
+      ++ArgIdx;
+
       if ((*Param)->isTemplateParameterPack()) {
         // The template parameter was a template parameter pack, so take the
         // deduced argument and place it on the argument pack. Note that we
@@ -3067,16 +3116,47 @@ bool Sema::CheckTemplateArgumentList(TemplateDecl *Template,
         // Move to the next template parameter.
         ++Param;
       }
-      
-      // If this template argument is a pack expansion, record that fact
-      // and break out; we can't actually check any more.
-      if (TemplateArgs[ArgIdx].getArgument().isPackExpansion()) {
-        SawPackExpansion = true;
-        ++ArgIdx;
-        break;
+
+      // If we just saw a pack expansion, then directly convert the remaining
+      // arguments, because we don't know what parameters they'll match up
+      // with.
+      if (TemplateArgs[ArgIdx-1].getArgument().isPackExpansion()) {
+        bool InFinalParameterPack = Param != ParamEnd &&
+                                    Param + 1 == ParamEnd &&
+                                    (*Param)->isTemplateParameterPack() &&
+                                    !getExpandedPackSize(*Param);
+
+        if (!InFinalParameterPack && !ArgumentPack.empty()) {
+          // If we were part way through filling in an expanded parameter pack,
+          // fall back to just producing individual arguments.
+          Converted.insert(Converted.end(),
+                           ArgumentPack.begin(), ArgumentPack.end());
+          ArgumentPack.clear();
+        }
+
+        while (ArgIdx < NumArgs) {
+          if (InFinalParameterPack)
+            ArgumentPack.push_back(TemplateArgs[ArgIdx].getArgument());
+          else
+            Converted.push_back(TemplateArgs[ArgIdx].getArgument());
+          ++ArgIdx;
+        }
+
+        // Push the argument pack onto the list of converted arguments.
+        if (InFinalParameterPack) {
+          Converted.push_back(
+            TemplateArgument::CreatePackCopy(Context,
+                                             ArgumentPack.data(),
+                                             ArgumentPack.size()));
+          ArgumentPack.clear();
+        } else if (ExpansionIntoFixedList) {
+          // We have expanded a pack into a fixed list.
+          *ExpansionIntoFixedList = true;
+        }
+
+        return false;
       }
-      
-      ++ArgIdx;
+
       continue;
     }
 
@@ -3087,14 +3167,30 @@ bool Sema::CheckTemplateArgumentList(TemplateDecl *Template,
                                                          ArgumentPack.data(),
                                                          ArgumentPack.size()));
         
-      return Invalid;
+      return false;
     }
 
     // If we have a template parameter pack with no more corresponding
     // arguments, just break out now and we'll fill in the argument pack below.
-    if ((*Param)->isTemplateParameterPack())
-      break;
-    
+    if ((*Param)->isTemplateParameterPack()) {
+      assert(!getExpandedPackSize(*Param) &&
+             "Should have dealt with this already");
+
+      // A non-expanded parameter pack before the end of the parameter list
+      // only occurs for an ill-formed template parameter list, unless we've
+      // got a partial argument list for a function template, so just bail out.
+      if (Param + 1 != ParamEnd)
+        return true;
+
+      Converted.push_back(TemplateArgument::CreatePackCopy(Context,
+                                                       ArgumentPack.data(),
+                                                       ArgumentPack.size()));
+      ArgumentPack.clear();
+
+      ++Param;
+      continue;
+    }
+
     // Check whether we have a default argument.
     TemplateArgumentLoc Arg;
 
@@ -3181,86 +3277,12 @@ bool Sema::CheckTemplateArgumentList(TemplateDecl *Template,
     ++ArgIdx;
   }
 
-  // If we saw a pack expansion, then directly convert the remaining arguments,
-  // because we don't know what parameters they'll match up with.
-  if (SawPackExpansion) {
-    bool AddToArgumentPack
-      = Param != ParamEnd && (*Param)->isTemplateParameterPack();
-    while (ArgIdx < NumArgs) {
-      if (AddToArgumentPack)
-        ArgumentPack.push_back(TemplateArgs[ArgIdx].getArgument());
-      else
-        Converted.push_back(TemplateArgs[ArgIdx].getArgument());
-      ++ArgIdx;
-    }
-
-    // Push the argument pack onto the list of converted arguments.
-    if (AddToArgumentPack) {
-      if (ArgumentPack.empty())
-        Converted.push_back(TemplateArgument(0, 0));
-      else {
-        Converted.push_back(
-          TemplateArgument::CreatePackCopy(Context,
-                                           ArgumentPack.data(),
-                                           ArgumentPack.size()));
-        ArgumentPack.clear();
-      }      
-    } else if (ExpansionIntoFixedList) {
-      // We have expanded a pack into a fixed list.
-      *ExpansionIntoFixedList = true;
-    }
-
-    return Invalid;
-  }
-
   // If we have any leftover arguments, then there were too many arguments.
   // Complain and fail.
   if (ArgIdx < NumArgs)
     return diagnoseArityMismatch(*this, Template, TemplateLoc, TemplateArgs);
-  
-  // If we have an expanded parameter pack, make sure we don't have too
-  // many arguments.
-  // FIXME: This really should fall out from the normal arity checking.
-  if (Param != ParamEnd) {
-    if (NonTypeTemplateParmDecl *NTTP
-          = dyn_cast<NonTypeTemplateParmDecl>(*Param)) {
-      if (NTTP->isExpandedParameterPack() &&
-          ArgumentPack.size() < NTTP->getNumExpansionTypes()) {
-        Diag(TemplateLoc, diag::err_template_arg_list_different_arity)
-          << false
-          << (isa<ClassTemplateDecl>(Template)? 0 :
-              isa<FunctionTemplateDecl>(Template)? 1 :
-              isa<TemplateTemplateParmDecl>(Template)? 2 : 3)
-          << Template;
-        Diag(Template->getLocation(), diag::note_template_decl_here)
-          << Params->getSourceRange();
-        return true;
-      }
-    }
-  }
-  
-  // Form argument packs for each of the parameter packs remaining.
-  while (Param != ParamEnd) {
-    // If we're checking a partial list of template arguments, don't fill
-    // in arguments for non-template parameter packs.
-    if ((*Param)->isTemplateParameterPack()) {
-      if (!HasParameterPack)
-        return true;
-      if (ArgumentPack.empty())
-        Converted.push_back(TemplateArgument(0, 0));
-      else {
-        Converted.push_back(TemplateArgument::CreatePackCopy(Context,
-                                                          ArgumentPack.data(),
-                                                         ArgumentPack.size()));
-        ArgumentPack.clear();
-      }
-    } else if (!PartialTemplateArgs)
-      return diagnoseArityMismatch(*this, Template, TemplateLoc, TemplateArgs);
-
-    ++Param;
-  }
 
-  return Invalid;
+  return false;
 }
 
 namespace {
@@ -3650,7 +3672,7 @@ CheckTemplateArgumentAddressOfObjectOrFunction(Sema &S,
     switch (isNullPointerValueTemplateArgument(S, Param, ParamType, Arg)) {
     case NPV_NullPointer:
       S.Diag(Arg->getExprLoc(), diag::warn_cxx98_compat_template_arg_null);
-      Converted = TemplateArgument((Decl *)0);
+      Converted = TemplateArgument(ParamType, /*isNullPtr*/true);
       return false;
 
     case NPV_Error:
@@ -3738,7 +3760,7 @@ CheckTemplateArgumentAddressOfObjectOrFunction(Sema &S,
     return true;
   }
 
-  NamedDecl *Entity = DRE->getDecl();
+  ValueDecl *Entity = DRE->getDecl();
 
   // Cannot refer to non-static data members
   if (FieldDecl *Field = dyn_cast<FieldDecl>(Entity)) {
@@ -3926,7 +3948,8 @@ CheckTemplateArgumentAddressOfObjectOrFunction(Sema &S,
   }
 
   // Create the template argument.
-  Converted = TemplateArgument(Entity->getCanonicalDecl());
+  Converted = TemplateArgument(cast<ValueDecl>(Entity->getCanonicalDecl()),
+                               ParamType->isReferenceType());
   S.MarkAnyDeclReferenced(Arg->getLocStart(), Entity);
   return false;
 }
@@ -3947,7 +3970,7 @@ static bool CheckTemplateArgumentPointerToMember(Sema &S,
     return true;
   case NPV_NullPointer:
     S.Diag(Arg->getExprLoc(), diag::warn_cxx98_compat_template_arg_null);
-    Converted = TemplateArgument((Decl *)0);
+    Converted = TemplateArgument(ParamType, /*isNullPtr*/true);
     return false;
   case NPV_NotNullPointer:
     break;
@@ -4016,10 +4039,12 @@ static bool CheckTemplateArgumentPointerToMember(Sema &S,
         if (isa<NonTypeTemplateParmDecl>(VD) ||
             (isa<VarDecl>(VD) &&
              S.Context.getCanonicalType(VD->getType()).isConstQualified())) {
-          if (Arg->isTypeDependent() || Arg->isValueDependent())
+          if (Arg->isTypeDependent() || Arg->isValueDependent()) {
             Converted = TemplateArgument(Arg);
-          else
-            Converted = TemplateArgument(VD->getCanonicalDecl());
+          } else {
+            VD = cast<ValueDecl>(VD->getCanonicalDecl());
+            Converted = TemplateArgument(VD, /*isReferenceParam*/false);
+          }
           return Invalid;
         }
       }
@@ -4040,10 +4065,12 @@ static bool CheckTemplateArgumentPointerToMember(Sema &S,
 
     // Okay: this is the address of a non-static member, and therefore
     // a member pointer constant.
-    if (Arg->isTypeDependent() || Arg->isValueDependent())
+    if (Arg->isTypeDependent() || Arg->isValueDependent()) {
       Converted = TemplateArgument(Arg);
-    else
-      Converted = TemplateArgument(DRE->getDecl()->getCanonicalDecl());
+    } else {
+      ValueDecl *D = cast<ValueDecl>(DRE->getDecl()->getCanonicalDecl());
+      Converted = TemplateArgument(D, /*isReferenceParam*/false);
+    }
     return Invalid;
   }
 
@@ -4396,8 +4423,8 @@ ExprResult Sema::CheckTemplateArgument(NonTypeTemplateParmDecl *Param,
       
     case NPV_NullPointer:
       Diag(Arg->getExprLoc(), diag::warn_cxx98_compat_template_arg_null);
-      Converted = TemplateArgument((Decl *)0);
-      return Owned(Arg);;
+      Converted = TemplateArgument(ParamType, /*isNullPtr*/true);
+      return Owned(Arg);
     }
   }
 
@@ -4417,8 +4444,9 @@ ExprResult Sema::CheckTemplateArgument(NonTypeTemplateParmDecl *Param,
 /// This routine implements the semantics of C++ [temp.arg.template].
 /// It returns true if an error occurred, and false otherwise.
 bool Sema::CheckTemplateArgument(TemplateTemplateParmDecl *Param,
-                                 const TemplateArgumentLoc &Arg) {
-  TemplateName Name = Arg.getArgument().getAsTemplate();
+                                 const TemplateArgumentLoc &Arg,
+                                 unsigned ArgumentPackIndex) {
+  TemplateName Name = Arg.getArgument().getAsTemplateOrTemplatePattern();
   TemplateDecl *Template = Name.getAsTemplateDecl();
   if (!Template) {
     // Any dependent template name is fine.
@@ -4448,8 +4476,12 @@ bool Sema::CheckTemplateArgument(TemplateTemplateParmDecl *Param,
       << Template;
   }
 
+  TemplateParameterList *Params = Param->getTemplateParameters();
+  if (Param->isExpandedParameterPack())
+    Params = Param->getExpansionTemplateParameters(ArgumentPackIndex);
+
   return !TemplateParameterListsAreEqual(Template->getTemplateParameters(),
-                                         Param->getTemplateParameters(),
+                                         Params,
                                          true,
                                          TPL_TemplateTemplateArgumentMatch,
                                          Arg.getLocation());
@@ -4463,12 +4495,9 @@ ExprResult
 Sema::BuildExpressionFromDeclTemplateArgument(const TemplateArgument &Arg,
                                               QualType ParamType,
                                               SourceLocation Loc) {
-  assert(Arg.getKind() == TemplateArgument::Declaration &&
-         "Only declaration template arguments permitted here");
-  
   // For a NULL non-type template argument, return nullptr casted to the
   // parameter's type.
-  if (!Arg.getAsDecl()) {
+  if (Arg.getKind() == TemplateArgument::NullPtr) {
     return ImpCastExprToType(
              new (Context) CXXNullPtrLiteralExpr(Context.NullPtrTy, Loc),
                              ParamType,
@@ -4476,7 +4505,9 @@ Sema::BuildExpressionFromDeclTemplateArgument(const TemplateArgument &Arg,
                                ? CK_NullToMemberPointer
                                : CK_NullToPointer);
   }
-  
+  assert(Arg.getKind() == TemplateArgument::Declaration &&
+         "Only declaration template arguments permitted here");
+
   ValueDecl *VD = cast<ValueDecl>(Arg.getAsDecl());
 
   if (VD->getDeclContext()->isRecord() &&
@@ -4524,7 +4555,7 @@ Sema::BuildExpressionFromDeclTemplateArgument(const TemplateArgument &Arg,
       assert(!RefExpr.isInvalid() &&
              Context.hasSameType(((Expr*) RefExpr.get())->getType(),
                                  ParamType.getUnqualifiedType()));
-      return move(RefExpr);
+      return RefExpr;
     }
   }
 
@@ -4542,7 +4573,7 @@ Sema::BuildExpressionFromDeclTemplateArgument(const TemplateArgument &Arg,
       if (RefExpr.isInvalid())
         return ExprError();
 
-      return move(RefExpr);
+      return RefExpr;
     }
 
     // Take the address of everything else
@@ -5071,10 +5102,10 @@ static bool CheckNonTypeClassTemplatePartialSpecializationArgs(Sema &S,
       continue;
     }
 
-    Expr *ArgExpr = Args[I].getAsExpr();
-    if (!ArgExpr) {
+    if (Args[I].getKind() != TemplateArgument::Expression)
       continue;
-    }
+
+    Expr *ArgExpr = Args[I].getAsExpr();
 
     // We can have a pack expansion of any of the bullets below.
     if (PackExpansionExpr *Expansion = dyn_cast<PackExpansionExpr>(ArgExpr))
@@ -5173,7 +5204,7 @@ Sema::ActOnClassTemplateSpecialization(Scope *S, unsigned TagSpec,
   // NOTE: KWLoc is the location of the tag keyword. This will instead
   // store the location of the outermost template keyword in the declaration.
   SourceLocation TemplateKWLoc = TemplateParameterLists.size() > 0
-    ? TemplateParameterLists.get()[0]->getTemplateLoc() : SourceLocation();
+    ? TemplateParameterLists[0]->getTemplateLoc() : SourceLocation();
 
   // Find the class template we're specializing
   TemplateName Name = TemplateD.getAsVal<TemplateName>();
@@ -5199,7 +5230,7 @@ Sema::ActOnClassTemplateSpecialization(Scope *S, unsigned TagSpec,
     = MatchTemplateParametersToScopeSpecifier(TemplateNameLoc, 
                                               TemplateNameLoc,
                                               SS,
-                        (TemplateParameterList**)TemplateParameterLists.get(),
+                                              TemplateParameterLists.data(),
                                               TemplateParameterLists.size(),
                                               TUK == TUK_Friend,
                                               isExplicitSpecialization,
@@ -5354,7 +5385,7 @@ Sema::ActOnClassTemplateSpecialization(Scope *S, unsigned TagSpec,
     if (TemplateParameterLists.size() > 0) {
       Specialization->setTemplateParameterListsInfo(Context,
                                               TemplateParameterLists.size(),
-                    (TemplateParameterList**) TemplateParameterLists.release());
+                                              TemplateParameterLists.data());
     }
     PrevDecl = 0;
     CanonType = Context.getTypeDeclType(Specialization);
@@ -5382,7 +5413,7 @@ Sema::ActOnClassTemplateSpecialization(Scope *S, unsigned TagSpec,
                                 TemplateParams,
                                 AS_none, /*ModulePrivateLoc=*/SourceLocation(),
                                 TemplateParameterLists.size() - 1,
-                  (TemplateParameterList**) TemplateParameterLists.release());
+                                TemplateParameterLists.data());
     }
 
     // Create a new class template partial specialization declaration node.
@@ -5406,7 +5437,7 @@ Sema::ActOnClassTemplateSpecialization(Scope *S, unsigned TagSpec,
     if (TemplateParameterLists.size() > 1 && SS.isSet()) {
       Partial->setTemplateParameterListsInfo(Context,
                                              TemplateParameterLists.size() - 1,
-                    (TemplateParameterList**) TemplateParameterLists.release());
+                                             TemplateParameterLists.data());
     }
 
     if (!PrevPartial)
@@ -5461,7 +5492,7 @@ Sema::ActOnClassTemplateSpecialization(Scope *S, unsigned TagSpec,
     if (TemplateParameterLists.size() > 0) {
       Specialization->setTemplateParameterListsInfo(Context,
                                               TemplateParameterLists.size(),
-                    (TemplateParameterList**) TemplateParameterLists.release());
+                                              TemplateParameterLists.data());
     }
 
     if (!PrevDecl)
@@ -5544,7 +5575,6 @@ Sema::ActOnClassTemplateSpecialization(Scope *S, unsigned TagSpec,
     Specialization->setTypeAsWritten(WrittenTy);
     Specialization->setTemplateKeywordLoc(TemplateKWLoc);
   }
-  TemplateArgsIn.release();
 
   // C++ [temp.expl.spec]p9:
   //   A template explicit specialization is in the scope of the
@@ -5579,7 +5609,7 @@ Sema::ActOnClassTemplateSpecialization(Scope *S, unsigned TagSpec,
 Decl *Sema::ActOnTemplateDeclarator(Scope *S,
                               MultiTemplateParamsArg TemplateParameterLists,
                                     Declarator &D) {
-  Decl *NewDecl = HandleDeclarator(S, D, move(TemplateParameterLists));
+  Decl *NewDecl = HandleDeclarator(S, D, TemplateParameterLists);
   ActOnDocumentableDecl(NewDecl);
   return NewDecl;
 }
@@ -5598,7 +5628,7 @@ Decl *Sema::ActOnStartOfFunctionTemplateDef(Scope *FnBodyScope,
 
   D.setFunctionDefinitionKind(FDK_Definition);
   Decl *DP = HandleDeclarator(ParentScope, D,
-                              move(TemplateParameterLists));
+                              TemplateParameterLists);
   if (FunctionTemplateDecl *FunctionTemplate
         = dyn_cast_or_null<FunctionTemplateDecl>(DP))
     return ActOnStartOfFunctionDef(FnBodyScope,
@@ -5902,7 +5932,7 @@ Sema::CheckFunctionTemplateSpecialization(FunctionDecl *FD,
       // Perform template argument deduction to determine whether we may be
       // specializing this template.
       // FIXME: It is somewhat wasteful to build
-      TemplateDeductionInfo Info(Context, FD->getLocation());
+      TemplateDeductionInfo Info(FD->getLocation());
       FunctionDecl *Specialization = 0;
       if (TemplateDeductionResult TDK
             = DeduceTemplateArguments(FunTmpl, ExplicitTemplateArgs,
@@ -6399,7 +6429,6 @@ Sema::ActOnExplicitInstantiation(Scope *S,
                                                 TemplateArgs,
                                   Context.getTypeDeclType(Specialization));
   Specialization->setTypeAsWritten(WrittenTy);
-  TemplateArgsIn.release();
 
   // Set source locations for keywords.
   Specialization->setExternLoc(ExternLoc);
@@ -6475,9 +6504,8 @@ Sema::ActOnExplicitInstantiation(Scope *S,
   Decl *TagD = ActOnTag(S, TagSpec, Sema::TUK_Reference,
                         KWLoc, SS, Name, NameLoc, Attr, AS_none,
                         /*ModulePrivateLoc=*/SourceLocation(),
-                        MultiTemplateParamsArg(*this, 0, 0),
-                        Owned, IsDependent, SourceLocation(), false,
-                        TypeResult());
+                        MultiTemplateParamsArg(), Owned, IsDependent,
+                        SourceLocation(), false, TypeResult());
   assert(!IsDependent && "explicit instantiation of dependent name not yet handled");
 
   if (!TagD)
@@ -6729,12 +6757,10 @@ DeclResult Sema::ActOnExplicitInstantiation(Scope *S,
     TemplateIdAnnotation *TemplateId = D.getName().TemplateId;
     TemplateArgs.setLAngleLoc(TemplateId->LAngleLoc);
     TemplateArgs.setRAngleLoc(TemplateId->RAngleLoc);
-    ASTTemplateArgsPtr TemplateArgsPtr(*this,
-                                       TemplateId->getTemplateArgs(),
+    ASTTemplateArgsPtr TemplateArgsPtr(TemplateId->getTemplateArgs(),
                                        TemplateId->NumArgs);
     translateTemplateArguments(TemplateArgsPtr, TemplateArgs);
     HasExplicitTemplateArgs = true;
-    TemplateArgsPtr.release();
   }
 
   // C++ [temp.explicit]p1:
@@ -6762,7 +6788,7 @@ DeclResult Sema::ActOnExplicitInstantiation(Scope *S,
     if (!FunTmpl)
       continue;
 
-    TemplateDeductionInfo Info(Context, D.getIdentifierLoc());
+    TemplateDeductionInfo Info(D.getIdentifierLoc());
     FunctionDecl *Specialization = 0;
     if (TemplateDeductionResult TDK
           = DeduceTemplateArguments(FunTmpl,
diff --git a/lib/Sema/SemaTemplateDeduction.cpp b/lib/Sema/SemaTemplateDeduction.cpp
index 9500ec3219d4..bf4533d6998c 100644
--- a/lib/Sema/SemaTemplateDeduction.cpp
+++ b/lib/Sema/SemaTemplateDeduction.cpp
@@ -158,9 +158,6 @@ static NonTypeTemplateParmDecl *getDeducedParameterFromExpr(Expr *E) {
 /// \brief Determine whether two declaration pointers refer to the same
 /// declaration.
 static bool isSameDeclaration(Decl *X, Decl *Y) {
-  if (!X || !Y)
-    return !X && !Y;
-
   if (NamedDecl *NX = dyn_cast<NamedDecl>(X))
     X = NX->getUnderlyingDecl();
   if (NamedDecl *NY = dyn_cast<NamedDecl>(Y))
@@ -262,7 +259,27 @@ checkDeducedTemplateArguments(ASTContext &Context,
     // If we deduced two declarations, make sure they they refer to the
     // same declaration.
     if (Y.getKind() == TemplateArgument::Declaration &&
-        isSameDeclaration(X.getAsDecl(), Y.getAsDecl()))
+        isSameDeclaration(X.getAsDecl(), Y.getAsDecl()) &&
+        X.isDeclForReferenceParam() == Y.isDeclForReferenceParam())
+      return X;
+
+    // All other combinations are incompatible.
+    return DeducedTemplateArgument();
+
+  case TemplateArgument::NullPtr:
+    // If we deduced a null pointer and a dependent expression, keep the
+    // null pointer.
+    if (Y.getKind() == TemplateArgument::Expression)
+      return X;
+
+    // If we deduced a null pointer and an integral constant, keep the
+    // integral constant.
+    if (Y.getKind() == TemplateArgument::Integral)
+      return Y;
+
+    // If we deduced two null pointers, make sure they have the same type.
+    if (Y.getKind() == TemplateArgument::NullPtr &&
+        Context.hasSameType(X.getNullPtrType(), Y.getNullPtrType()))
       return X;
 
     // All other combinations are incompatible.
@@ -356,13 +373,15 @@ DeduceNonTypeTemplateArgument(Sema &S,
 static Sema::TemplateDeductionResult
 DeduceNonTypeTemplateArgument(Sema &S,
                               NonTypeTemplateParmDecl *NTTP,
-                              Decl *D,
+                              ValueDecl *D,
                               TemplateDeductionInfo &Info,
                     SmallVectorImpl<DeducedTemplateArgument> &Deduced) {
   assert(NTTP->getDepth() == 0 &&
          "Cannot deduce non-type template argument with depth > 0");
 
-  DeducedTemplateArgument NewDeduced(D? D->getCanonicalDecl() : 0);
+  D = D ? cast<ValueDecl>(D->getCanonicalDecl()) : 0;
+  TemplateArgument New(D, NTTP->getType()->isReferenceType());
+  DeducedTemplateArgument NewDeduced(New);
   DeducedTemplateArgument Result = checkDeducedTemplateArguments(S.Context,
                                                      Deduced[NTTP->getIndex()],
                                                                  NewDeduced);
@@ -570,7 +589,10 @@ static void PrepareArgumentPackDeduction(Sema &S,
     SavedPacks[I] = Deduced[PackIndices[I]];
     Deduced[PackIndices[I]] = TemplateArgument();
 
-    // If the template arugment pack was explicitly specified, add that to
+    if (!S.CurrentInstantiationScope)
+      continue;
+
+    // If the template argument pack was explicitly specified, add that to
     // the set of deduced arguments.
     const TemplateArgument *ExplicitArgs;
     unsigned NumExplicitArgs;
@@ -612,7 +634,7 @@ FinishArgumentPackDeduction(Sema &S,
 
     if (NewlyDeducedPacks[I].empty()) {
       // If we deduced an empty argument pack, create it now.
-      NewPack = DeducedTemplateArgument(TemplateArgument(0, 0));
+      NewPack = DeducedTemplateArgument(TemplateArgument::getEmptyPack());
     } else {
       TemplateArgument *ArgumentPack
         = new (S.Context) TemplateArgument [NewlyDeducedPacks[I].size()];
@@ -1371,9 +1393,11 @@ DeduceTemplateArgumentsByTypeMatch(Sema &S,
             // If this is a base class, try to perform template argument
             // deduction from it.
             if (NextT != RecordT) {
+              TemplateDeductionInfo BaseInfo(Info.getLocation());
               Sema::TemplateDeductionResult BaseResult
                 = DeduceTemplateArguments(S, TemplateParams, SpecParam,
-                                          QualType(NextT, 0), Info, Deduced);
+                                          QualType(NextT, 0), BaseInfo,
+                                          Deduced);
 
               // If template argument deduction for this base was successful,
               // note that we had some success. Otherwise, ignore any deductions
@@ -1382,6 +1406,9 @@ DeduceTemplateArgumentsByTypeMatch(Sema &S,
                 Successful = true;
                 DeducedOrig.clear();
                 DeducedOrig.append(Deduced.begin(), Deduced.end());
+                Info.Param = BaseInfo.Param;
+                Info.FirstArg = BaseInfo.FirstArg;
+                Info.SecondArg = BaseInfo.SecondArg;
               }
               else
                 Deduced = DeducedOrig;
@@ -1596,7 +1623,17 @@ DeduceTemplateArguments(Sema &S,
 
   case TemplateArgument::Declaration:
     if (Arg.getKind() == TemplateArgument::Declaration &&
-        isSameDeclaration(Param.getAsDecl(), Arg.getAsDecl()))
+        isSameDeclaration(Param.getAsDecl(), Arg.getAsDecl()) &&
+        Param.isDeclForReferenceParam() == Arg.isDeclForReferenceParam())
+      return Sema::TDK_Success;
+
+    Info.FirstArg = Param;
+    Info.SecondArg = Arg;
+    return Sema::TDK_NonDeducedMismatch;
+
+  case TemplateArgument::NullPtr:
+    if (Arg.getKind() == TemplateArgument::NullPtr &&
+        S.Context.hasSameType(Param.getNullPtrType(), Arg.getNullPtrType()))
       return Sema::TDK_Success;
 
     Info.FirstArg = Param;
@@ -1867,7 +1904,11 @@ static bool isSameTemplateArg(ASTContext &Context,
              Context.getCanonicalType(Y.getAsType());
 
     case TemplateArgument::Declaration:
-      return isSameDeclaration(X.getAsDecl(), Y.getAsDecl());
+      return isSameDeclaration(X.getAsDecl(), Y.getAsDecl()) &&
+             X.isDeclForReferenceParam() == Y.isDeclForReferenceParam();
+
+    case TemplateArgument::NullPtr:
+      return Context.hasSameType(X.getNullPtrType(), Y.getNullPtrType());
 
     case TemplateArgument::Template:
     case TemplateArgument::TemplateExpansion:
@@ -1937,6 +1978,14 @@ getTrivialTemplateArgumentLoc(Sema &S,
     return TemplateArgumentLoc(TemplateArgument(E), E);
   }
 
+  case TemplateArgument::NullPtr: {
+    Expr *E
+      = S.BuildExpressionFromDeclTemplateArgument(Arg, NTTPType, Loc)
+          .takeAs<Expr>();
+    return TemplateArgumentLoc(TemplateArgument(NTTPType, /*isNullPtr*/true),
+                               E);
+  }
+
   case TemplateArgument::Integral: {
     Expr *E
       = S.BuildExpressionFromIntegralTemplateArgument(Arg, Loc).takeAs<Expr>();
@@ -2162,6 +2211,9 @@ Sema::TemplateDeductionResult
 Sema::DeduceTemplateArguments(ClassTemplatePartialSpecializationDecl *Partial,
                               const TemplateArgumentList &TemplateArgs,
                               TemplateDeductionInfo &Info) {
+  if (Partial->isInvalidDecl())
+    return TDK_Invalid;
+
   // C++ [temp.class.spec.match]p2:
   //   A partial specialization matches a given actual template
   //   argument list if the template arguments of the partial
@@ -2601,12 +2653,13 @@ Sema::FinishTemplateArgumentDeduction(FunctionTemplateDecl *FunctionTemplate,
       // explicitly-specified set (C++0x [temp.arg.explicit]p9).
       const TemplateArgument *ExplicitArgs;
       unsigned NumExplicitArgs;
-      if (CurrentInstantiationScope->getPartiallySubstitutedPack(&ExplicitArgs,
+      if (CurrentInstantiationScope &&
+          CurrentInstantiationScope->getPartiallySubstitutedPack(&ExplicitArgs,
                                                              &NumExplicitArgs)
           == Param)
         Builder.push_back(TemplateArgument(ExplicitArgs, NumExplicitArgs));
       else
-        Builder.push_back(TemplateArgument(0, 0));
+        Builder.push_back(TemplateArgument::getEmptyPack());
 
       continue;
     }
@@ -2784,7 +2837,7 @@ ResolveOverloadForDeduction(Sema &S, TemplateParameterList *TemplateParams,
       
       // Otherwise, see if we can resolve a function type 
       FunctionDecl *Specialization = 0;
-      TemplateDeductionInfo Info(S.Context, Ovl->getNameLoc());
+      TemplateDeductionInfo Info(Ovl->getNameLoc());
       if (S.DeduceTemplateArguments(FunTmpl, &ExplicitTemplateArgs,
                                     Specialization, Info))
         continue;
@@ -2815,7 +2868,7 @@ ResolveOverloadForDeduction(Sema &S, TemplateParameterList *TemplateParams,
     // So we do not reject deductions which were made elsewhere.
     SmallVector<DeducedTemplateArgument, 8>
       Deduced(TemplateParams->size());
-    TemplateDeductionInfo Info(S.Context, Ovl->getNameLoc());
+    TemplateDeductionInfo Info(Ovl->getNameLoc());
     Sema::TemplateDeductionResult Result
       = DeduceTemplateArgumentsByTypeMatch(S, TemplateParams, ParamType,
                                            ArgType, Info, Deduced, TDF);
@@ -2992,8 +3045,6 @@ DeduceTemplateArgumentByListElement(Sema &S,
 ///
 /// \param Args the function call arguments
 ///
-/// \param NumArgs the number of arguments in Args
-///
 /// \param Name the name of the function being called. This is only significant
 /// when the function template is a conversion function template, in which
 /// case this routine will also perform template argument deduction based on
@@ -3013,6 +3064,9 @@ Sema::DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate,
                               llvm::ArrayRef<Expr *> Args,
                               FunctionDecl *&Specialization,
                               TemplateDeductionInfo &Info) {
+  if (FunctionTemplate->isInvalidDecl())
+    return TDK_Invalid;
+
   FunctionDecl *Function = FunctionTemplate->getTemplatedDecl();
 
   // C++ [temp.deduct.call]p1:
@@ -3269,6 +3323,9 @@ Sema::DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate,
                               QualType ArgFunctionType,
                               FunctionDecl *&Specialization,
                               TemplateDeductionInfo &Info) {
+  if (FunctionTemplate->isInvalidDecl())
+    return TDK_Invalid;
+
   FunctionDecl *Function = FunctionTemplate->getTemplatedDecl();
   TemplateParameterList *TemplateParams
     = FunctionTemplate->getTemplateParameters();
@@ -3328,6 +3385,9 @@ Sema::DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate,
                               QualType ToType,
                               CXXConversionDecl *&Specialization,
                               TemplateDeductionInfo &Info) {
+  if (FunctionTemplate->isInvalidDecl())
+    return TDK_Invalid;
+
   CXXConversionDecl *Conv
     = cast<CXXConversionDecl>(FunctionTemplate->getTemplatedDecl());
   QualType FromType = Conv->getConversionType();
@@ -3572,7 +3632,7 @@ Sema::DeduceAutoType(TypeSourceInfo *Type, Expr *&Init,
   QualType InitType = Init->getType();
   unsigned TDF = 0;
 
-  TemplateDeductionInfo Info(Context, Loc);
+  TemplateDeductionInfo Info(Loc);
 
   InitListExpr *InitList = dyn_cast<InitListExpr>(Init);
   if (InitList) {
@@ -3594,10 +3654,11 @@ Sema::DeduceAutoType(TypeSourceInfo *Type, Expr *&Init,
       return DAR_Failed;
   }
 
-  QualType DeducedType = Deduced[0].getAsType();
-  if (DeducedType.isNull())
+  if (Deduced[0].getKind() != TemplateArgument::Type)
     return DAR_Failed;
 
+  QualType DeducedType = Deduced[0].getAsType();
+
   if (InitList) {
     DeducedType = BuildStdInitializerList(DeducedType, Loc);
     if (DeducedType.isNull())
@@ -3637,26 +3698,23 @@ MarkUsedTemplateParameters(ASTContext &Ctx, QualType T,
                            llvm::SmallBitVector &Deduced);
 
 /// \brief If this is a non-static member function,
-static void MaybeAddImplicitObjectParameterType(ASTContext &Context,
+static void AddImplicitObjectParameterType(ASTContext &Context,
                                                 CXXMethodDecl *Method,
                                  SmallVectorImpl<QualType> &ArgTypes) {
-  if (Method->isStatic())
-    return;
-
-  // C++ [over.match.funcs]p4:
-  //
-  //   For non-static member functions, the type of the implicit
-  //   object parameter is
-  //     - "lvalue reference to cv X" for functions declared without a
-  //       ref-qualifier or with the & ref-qualifier
-  //     - "rvalue reference to cv X" for functions declared with the
-  //       && ref-qualifier
+  // C++11 [temp.func.order]p3:
+  //   [...] The new parameter is of type "reference to cv A," where cv are
+  //   the cv-qualifiers of the function template (if any) and A is
+  //   the class of which the function template is a member.
   //
-  // FIXME: We don't have ref-qualifiers yet, so we don't do that part.
+  // The standard doesn't say explicitly, but we pick the appropriate kind of
+  // reference type based on [over.match.funcs]p4.
   QualType ArgTy = Context.getTypeDeclType(Method->getParent());
   ArgTy = Context.getQualifiedType(ArgTy,
                         Qualifiers::fromCVRMask(Method->getTypeQualifiers()));
-  ArgTy = Context.getLValueReferenceType(ArgTy);
+  if (Method->getRefQualifier() == RQ_RValue)
+    ArgTy = Context.getRValueReferenceType(ArgTy);
+  else
+    ArgTy = Context.getLValueReferenceType(ArgTy);
   ArgTypes.push_back(ArgTy);
 }
 
@@ -3682,7 +3740,7 @@ static bool isAtLeastAsSpecializedAs(Sema &S,
   // C++0x [temp.deduct.partial]p3:
   //   The types used to determine the ordering depend on the context in which
   //   the partial ordering is done:
-  TemplateDeductionInfo Info(S.Context, Loc);
+  TemplateDeductionInfo Info(Loc);
   CXXMethodDecl *Method1 = 0;
   CXXMethodDecl *Method2 = 0;
   bool IsNonStatic2 = false;
@@ -3697,7 +3755,7 @@ static bool isAtLeastAsSpecializedAs(Sema &S,
     IsNonStatic1 = Method1 && !Method1->isStatic();
     IsNonStatic2 = Method2 && !Method2->isStatic();
 
-    // C++0x [temp.func.order]p3:
+    // C++11 [temp.func.order]p3:
     //   [...] If only one of the function templates is a non-static
     //   member, that function template is considered to have a new
     //   first parameter inserted in its function parameter list. The
@@ -3705,22 +3763,25 @@ static bool isAtLeastAsSpecializedAs(Sema &S,
     //   the cv-qualifiers of the function template (if any) and A is
     //   the class of which the function template is a member.
     //
+    // Note that we interpret this to mean "if one of the function
+    // templates is a non-static member and the other is a non-member";
+    // otherwise, the ordering rules for static functions against non-static
+    // functions don't make any sense.
+    //
     // C++98/03 doesn't have this provision, so instead we drop the
-    // first argument of the free function or static member, which
-    // seems to match existing practice.
+    // first argument of the free function, which seems to match
+    // existing practice.
     SmallVector<QualType, 4> Args1;
-    unsigned Skip1 = !S.getLangOpts().CPlusPlus0x &&
-      IsNonStatic2 && !IsNonStatic1;
-    if (S.getLangOpts().CPlusPlus0x && IsNonStatic1 && !IsNonStatic2)
-      MaybeAddImplicitObjectParameterType(S.Context, Method1, Args1);
+    unsigned Skip1 = !S.getLangOpts().CPlusPlus0x && IsNonStatic2 && !Method1;
+    if (S.getLangOpts().CPlusPlus0x && IsNonStatic1 && !Method2)
+      AddImplicitObjectParameterType(S.Context, Method1, Args1);
     Args1.insert(Args1.end(),
                  Proto1->arg_type_begin() + Skip1, Proto1->arg_type_end());
 
     SmallVector<QualType, 4> Args2;
-    Skip2 = !S.getLangOpts().CPlusPlus0x &&
-      IsNonStatic1 && !IsNonStatic2;
-    if (S.getLangOpts().CPlusPlus0x && IsNonStatic2 && !IsNonStatic1)
-      MaybeAddImplicitObjectParameterType(S.Context, Method2, Args2);
+    Skip2 = !S.getLangOpts().CPlusPlus0x && IsNonStatic1 && !Method2;
+    if (S.getLangOpts().CPlusPlus0x && IsNonStatic2 && !Method1)
+      AddImplicitObjectParameterType(S.Context, Method2, Args2);
     Args2.insert(Args2.end(),
                  Proto2->arg_type_begin() + Skip2, Proto2->arg_type_end());
 
@@ -4118,7 +4179,7 @@ Sema::getMoreSpecializedPartialSpecialization(
   // template partial specialization's template arguments, for
   // example.
   SmallVector<DeducedTemplateArgument, 4> Deduced;
-  TemplateDeductionInfo Info(Context, Loc);
+  TemplateDeductionInfo Info(Loc);
 
   QualType PT1 = PS1->getInjectedSpecializationType();
   QualType PT2 = PS2->getInjectedSpecializationType();
@@ -4496,6 +4557,11 @@ MarkUsedTemplateParameters(ASTContext &Ctx,
   case TemplateArgument::Declaration:
     break;
 
+  case TemplateArgument::NullPtr:
+    MarkUsedTemplateParameters(Ctx, TemplateArg.getNullPtrType(), OnlyDeduced,
+                               Depth, Used);
+    break;
+
   case TemplateArgument::Type:
     MarkUsedTemplateParameters(Ctx, TemplateArg.getAsType(), OnlyDeduced,
                                Depth, Used);
diff --git a/lib/Sema/SemaTemplateInstantiate.cpp b/lib/Sema/SemaTemplateInstantiate.cpp
index 20e755fdaee1..665dd07b8f85 100644
--- a/lib/Sema/SemaTemplateInstantiate.cpp
+++ b/lib/Sema/SemaTemplateInstantiate.cpp
@@ -769,7 +769,7 @@ namespace {
     /// instantiating it.
     Decl *TransformDefinition(SourceLocation Loc, Decl *D);
 
-    /// \bried Transform the first qualifier within a scope by instantiating the
+    /// \brief Transform the first qualifier within a scope by instantiating the
     /// declaration.
     NamedDecl *TransformFirstQualifierInScope(NamedDecl *D, SourceLocation Loc);
       
@@ -802,11 +802,24 @@ namespace {
     ExprResult TransformPredefinedExpr(PredefinedExpr *E);
     ExprResult TransformDeclRefExpr(DeclRefExpr *E);
     ExprResult TransformCXXDefaultArgExpr(CXXDefaultArgExpr *E);
+
     ExprResult TransformTemplateParmRefExpr(DeclRefExpr *E,
                                             NonTypeTemplateParmDecl *D);
     ExprResult TransformSubstNonTypeTemplateParmPackExpr(
                                            SubstNonTypeTemplateParmPackExpr *E);
-    
+
+    /// \brief Rebuild a DeclRefExpr for a ParmVarDecl reference.
+    ExprResult RebuildParmVarDeclRefExpr(ParmVarDecl *PD, SourceLocation Loc);
+
+    /// \brief Transform a reference to a function parameter pack.
+    ExprResult TransformFunctionParmPackRefExpr(DeclRefExpr *E,
+                                                ParmVarDecl *PD);
+
+    /// \brief Transform a FunctionParmPackExpr which was built when we couldn't
+    /// expand a function parameter pack reference which refers to an expanded
+    /// pack.
+    ExprResult TransformFunctionParmPackExpr(FunctionParmPackExpr *E);
+
     QualType TransformFunctionProtoType(TypeLocBuilder &TLB,
                                         FunctionProtoTypeLoc TL);
     QualType TransformFunctionProtoType(TypeLocBuilder &TLB,
@@ -835,7 +848,7 @@ namespace {
       ExprResult Result =
           TreeTransform<TemplateInstantiator>::TransformCallExpr(CE);
       getSema().CallsUndergoingInstantiation.pop_back();
-      return move(Result);
+      return Result;
     }
 
     ExprResult TransformLambdaExpr(LambdaExpr *E) {
@@ -1161,10 +1174,11 @@ ExprResult TemplateInstantiator::transformNonTypeTemplateParmRef(
     result = SemaRef.Owned(argExpr);
     type = argExpr->getType();
 
-  } else if (arg.getKind() == TemplateArgument::Declaration) {
+  } else if (arg.getKind() == TemplateArgument::Declaration ||
+             arg.getKind() == TemplateArgument::NullPtr) {
     ValueDecl *VD;
-    if (Decl *D = arg.getAsDecl()) {
-      VD = cast<ValueDecl>(D);
+    if (arg.getKind() == TemplateArgument::Declaration) {
+      VD = cast<ValueDecl>(arg.getAsDecl());
 
       // Find the instantiation of the template argument.  This is
       // required for nested templates.
@@ -1230,8 +1244,81 @@ TemplateInstantiator::TransformSubstNonTypeTemplateParmPackExpr(
 }
 
 ExprResult
+TemplateInstantiator::RebuildParmVarDeclRefExpr(ParmVarDecl *PD,
+                                                SourceLocation Loc) {
+  DeclarationNameInfo NameInfo(PD->getDeclName(), Loc);
+  return getSema().BuildDeclarationNameExpr(CXXScopeSpec(), NameInfo, PD);
+}
+
+ExprResult
+TemplateInstantiator::TransformFunctionParmPackExpr(FunctionParmPackExpr *E) {
+  if (getSema().ArgumentPackSubstitutionIndex != -1) {
+    // We can expand this parameter pack now.
+    ParmVarDecl *D = E->getExpansion(getSema().ArgumentPackSubstitutionIndex);
+    ValueDecl *VD = cast_or_null<ValueDecl>(TransformDecl(E->getExprLoc(), D));
+    if (!VD)
+      return ExprError();
+    return RebuildParmVarDeclRefExpr(cast<ParmVarDecl>(VD), E->getExprLoc());
+  }
+
+  QualType T = TransformType(E->getType());
+  if (T.isNull())
+    return ExprError();
+
+  // Transform each of the parameter expansions into the corresponding
+  // parameters in the instantiation of the function decl.
+  llvm::SmallVector<Decl*, 8> Parms;
+  Parms.reserve(E->getNumExpansions());
+  for (FunctionParmPackExpr::iterator I = E->begin(), End = E->end();
+       I != End; ++I) {
+    ParmVarDecl *D =
+        cast_or_null<ParmVarDecl>(TransformDecl(E->getExprLoc(), *I));
+    if (!D)
+      return ExprError();
+    Parms.push_back(D);
+  }
+
+  return FunctionParmPackExpr::Create(getSema().Context, T,
+                                      E->getParameterPack(),
+                                      E->getParameterPackLocation(), Parms);
+}
+
+ExprResult
+TemplateInstantiator::TransformFunctionParmPackRefExpr(DeclRefExpr *E,
+                                                       ParmVarDecl *PD) {
+  typedef LocalInstantiationScope::DeclArgumentPack DeclArgumentPack;
+  llvm::PointerUnion<Decl *, DeclArgumentPack *> *Found
+    = getSema().CurrentInstantiationScope->findInstantiationOf(PD);
+  assert(Found && "no instantiation for parameter pack");
+
+  Decl *TransformedDecl;
+  if (DeclArgumentPack *Pack = Found->dyn_cast<DeclArgumentPack *>()) {
+    // If this is a reference to a function parameter pack which we can substitute
+    // but can't yet expand, build a FunctionParmPackExpr for it.
+    if (getSema().ArgumentPackSubstitutionIndex == -1) {
+      QualType T = TransformType(E->getType());
+      if (T.isNull())
+        return ExprError();
+      return FunctionParmPackExpr::Create(getSema().Context, T, PD,
+                                          E->getExprLoc(), *Pack);
+    }
+
+    TransformedDecl = (*Pack)[getSema().ArgumentPackSubstitutionIndex];
+  } else {
+    TransformedDecl = Found->get<Decl*>();
+  }
+
+  // We have either an unexpanded pack or a specific expansion.
+  return RebuildParmVarDeclRefExpr(cast<ParmVarDecl>(TransformedDecl),
+                                   E->getExprLoc());
+}
+
+ExprResult
 TemplateInstantiator::TransformDeclRefExpr(DeclRefExpr *E) {
   NamedDecl *D = E->getDecl();
+
+  // Handle references to non-type template parameters and non-type template
+  // parameter packs.
   if (NonTypeTemplateParmDecl *NTTP = dyn_cast<NonTypeTemplateParmDecl>(D)) {
     if (NTTP->getDepth() < TemplateArgs.getNumLevels())
       return TransformTemplateParmRefExpr(E, NTTP);
@@ -1240,6 +1327,11 @@ TemplateInstantiator::TransformDeclRefExpr(DeclRefExpr *E) {
     // FindInstantiatedDecl will find it in the local instantiation scope.
   }
 
+  // Handle references to function parameter packs.
+  if (ParmVarDecl *PD = dyn_cast<ParmVarDecl>(D))
+    if (PD->isParameterPack())
+      return TransformFunctionParmPackRefExpr(E, PD);
+
   return TreeTransform<TemplateInstantiator>::TransformDeclRefExpr(E);
 }
 
@@ -2159,7 +2251,7 @@ Sema::InstantiateClassTemplateSpecialization(
   Template->getPartialSpecializations(PartialSpecs);
   for (unsigned I = 0, N = PartialSpecs.size(); I != N; ++I) {
     ClassTemplatePartialSpecializationDecl *Partial = PartialSpecs[I];
-    TemplateDeductionInfo Info(Context, PointOfInstantiation);
+    TemplateDeductionInfo Info(PointOfInstantiation);
     if (TemplateDeductionResult Result
           = DeduceTemplateArguments(Partial,
                                     ClassTemplateSpec->getTemplateArgs(),
@@ -2543,8 +2635,25 @@ bool Sema::Subst(const TemplateArgumentLoc *Args, unsigned NumArgs,
   return Instantiator.TransformTemplateArguments(Args, NumArgs, Result);
 }
 
+
+static const Decl* getCanonicalParmVarDecl(const Decl *D) {
+  // When storing ParmVarDecls in the local instantiation scope, we always
+  // want to use the ParmVarDecl from the canonical function declaration,
+  // since the map is then valid for any redeclaration or definition of that
+  // function.
+  if (const ParmVarDecl *PV = dyn_cast<ParmVarDecl>(D)) {
+    if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(PV->getDeclContext())) {
+      unsigned i = PV->getFunctionScopeIndex();
+      return FD->getCanonicalDecl()->getParamDecl(i);
+    }
+  }
+  return D;
+}
+
+
 llvm::PointerUnion<Decl *, LocalInstantiationScope::DeclArgumentPack *> *
 LocalInstantiationScope::findInstantiationOf(const Decl *D) {
+  D = getCanonicalParmVarDecl(D);
   for (LocalInstantiationScope *Current = this; Current;
        Current = Current->Outer) {
 
@@ -2576,6 +2685,7 @@ LocalInstantiationScope::findInstantiationOf(const Decl *D) {
 }
 
 void LocalInstantiationScope::InstantiatedLocal(const Decl *D, Decl *Inst) {
+  D = getCanonicalParmVarDecl(D);
   llvm::PointerUnion<Decl *, DeclArgumentPack *> &Stored = LocalDecls[D];
   if (Stored.isNull())
     Stored = Inst;
@@ -2588,11 +2698,13 @@ void LocalInstantiationScope::InstantiatedLocal(const Decl *D, Decl *Inst) {
 
 void LocalInstantiationScope::InstantiatedLocalPackArg(const Decl *D, 
                                                        Decl *Inst) {
+  D = getCanonicalParmVarDecl(D);
   DeclArgumentPack *Pack = LocalDecls[D].get<DeclArgumentPack *>();
   Pack->push_back(Inst);
 }
 
 void LocalInstantiationScope::MakeInstantiatedLocalArgPack(const Decl *D) {
+  D = getCanonicalParmVarDecl(D);
   llvm::PointerUnion<Decl *, DeclArgumentPack *> &Stored = LocalDecls[D];
   assert(Stored.isNull() && "Already instantiated this local");
   DeclArgumentPack *Pack = new DeclArgumentPack;
diff --git a/lib/Sema/SemaTemplateInstantiateDecl.cpp b/lib/Sema/SemaTemplateInstantiateDecl.cpp
index bdbe71dd8aba..19c46ab9c97f 100644
--- a/lib/Sema/SemaTemplateInstantiateDecl.cpp
+++ b/lib/Sema/SemaTemplateInstantiateDecl.cpp
@@ -158,6 +158,22 @@ Decl *TemplateDeclInstantiator::InstantiateTypedefNameDecl(TypedefNameDecl *D,
     SemaRef.MarkDeclarationsReferencedInType(D->getLocation(), DI->getType());
   }
 
+  // HACK: g++ has a bug where it gets the value kind of ?: wrong.
+  // libstdc++ relies upon this bug in its implementation of common_type.
+  // If we happen to be processing that implementation, fake up the g++ ?:
+  // semantics. See LWG issue 2141 for more information on the bug.
+  const DecltypeType *DT = DI->getType()->getAs<DecltypeType>();
+  CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(D->getDeclContext());
+  if (DT && RD && isa<ConditionalOperator>(DT->getUnderlyingExpr()) &&
+      DT->isReferenceType() &&
+      RD->getEnclosingNamespaceContext() == SemaRef.getStdNamespace() &&
+      RD->getIdentifier() && RD->getIdentifier()->isStr("common_type") &&
+      D->getIdentifier() && D->getIdentifier()->isStr("type") &&
+      SemaRef.getSourceManager().isInSystemHeader(D->getLocStart()))
+    // Fold it to the (non-reference) type which g++ would have produced.
+    DI = SemaRef.Context.getTrivialTypeSourceInfo(
+      DI->getType().getNonReferenceType());
+
   // Create the new typedef
   TypedefNameDecl *Typedef;
   if (IsTypeAlias)
@@ -510,7 +526,7 @@ Decl *TemplateDeclInstantiator::VisitFriendDecl(FriendDecl *D) {
     if (!InstTy)
       return 0;
 
-    FriendDecl *FD = SemaRef.CheckFriendTypeDecl(D->getLocation(),
+    FriendDecl *FD = SemaRef.CheckFriendTypeDecl(D->getLocStart(),
                                                  D->getFriendLoc(), InstTy);
     if (!FD)
       return 0;
@@ -1008,6 +1024,30 @@ Decl *TemplateDeclInstantiator::VisitCXXRecordDecl(CXXRecordDecl *D) {
   return Record;
 }
 
+/// \brief Adjust the given function type for an instantiation of the
+/// given declaration, to cope with modifications to the function's type that
+/// aren't reflected in the type-source information.
+///
+/// \param D The declaration we're instantiating.
+/// \param TInfo The already-instantiated type.
+static QualType adjustFunctionTypeForInstantiation(ASTContext &Context,
+                                                   FunctionDecl *D,
+                                                   TypeSourceInfo *TInfo) {
+  const FunctionProtoType *OrigFunc
+    = D->getType()->castAs<FunctionProtoType>();
+  const FunctionProtoType *NewFunc
+    = TInfo->getType()->castAs<FunctionProtoType>();
+  if (OrigFunc->getExtInfo() == NewFunc->getExtInfo())
+    return TInfo->getType();
+
+  FunctionProtoType::ExtProtoInfo NewEPI = NewFunc->getExtProtoInfo();
+  NewEPI.ExtInfo = OrigFunc->getExtInfo();
+  return Context.getFunctionType(NewFunc->getResultType(),
+                                 NewFunc->arg_type_begin(),
+                                 NewFunc->getNumArgs(),
+                                 NewEPI);
+}
+
 /// Normal class members are of more specific types and therefore
 /// don't make it here.  This function serves two purposes:
 ///   1) instantiating function templates
@@ -1048,7 +1088,7 @@ Decl *TemplateDeclInstantiator::VisitFunctionDecl(FunctionDecl *D,
   TypeSourceInfo *TInfo = SubstFunctionType(D, Params);
   if (!TInfo)
     return 0;
-  QualType T = TInfo->getType();
+  QualType T = adjustFunctionTypeForInstantiation(SemaRef.Context, D, TInfo);
 
   NestedNameSpecifierLoc QualifierLoc = D->getQualifierLoc();
   if (QualifierLoc) {
@@ -1075,7 +1115,7 @@ Decl *TemplateDeclInstantiator::VisitFunctionDecl(FunctionDecl *D,
 
   FunctionDecl *Function =
       FunctionDecl::Create(SemaRef.Context, DC, D->getInnerLocStart(),
-                           D->getLocation(), D->getDeclName(), T, TInfo,
+                           D->getNameInfo(), T, TInfo,
                            D->getStorageClass(), D->getStorageClassAsWritten(),
                            D->isInlineSpecified(), D->hasWrittenPrototype(),
                            D->isConstexpr());
@@ -1366,7 +1406,7 @@ TemplateDeclInstantiator::VisitCXXMethodDecl(CXXMethodDecl *D,
   TypeSourceInfo *TInfo = SubstFunctionType(D, Params);
   if (!TInfo)
     return 0;
-  QualType T = TInfo->getType();
+  QualType T = adjustFunctionTypeForInstantiation(SemaRef.Context, D, TInfo);
 
   // \brief If the type of this function, after ignoring parentheses,
   // is not *directly* a function type, then we're instantiating a function
@@ -1657,7 +1697,7 @@ Decl *TemplateDeclInstantiator::VisitNonTypeTemplateParmDecl(
     IsExpandedParameterPack = true;
     DI = D->getTypeSourceInfo();
     T = DI->getType();
-  } else if (isa<PackExpansionTypeLoc>(TL)) {
+  } else if (D->isPackExpansion()) {
     // The non-type template parameter pack's type is a pack expansion of types.
     // Determine whether we need to expand this parameter pack into separate
     // types.
@@ -1771,27 +1811,121 @@ Decl *TemplateDeclInstantiator::VisitNonTypeTemplateParmDecl(
   return Param;
 }
 
+static void collectUnexpandedParameterPacks(
+    Sema &S,
+    TemplateParameterList *Params,
+    SmallVectorImpl<UnexpandedParameterPack> &Unexpanded) {
+  for (TemplateParameterList::const_iterator I = Params->begin(),
+                                             E = Params->end(); I != E; ++I) {
+    if ((*I)->isTemplateParameterPack())
+      continue;
+    if (NonTypeTemplateParmDecl *NTTP = dyn_cast<NonTypeTemplateParmDecl>(*I))
+      S.collectUnexpandedParameterPacks(NTTP->getTypeSourceInfo()->getTypeLoc(),
+                                        Unexpanded);
+    if (TemplateTemplateParmDecl *TTP = dyn_cast<TemplateTemplateParmDecl>(*I))
+      collectUnexpandedParameterPacks(S, TTP->getTemplateParameters(),
+                                      Unexpanded);
+  }
+}
+
 Decl *
 TemplateDeclInstantiator::VisitTemplateTemplateParmDecl(
                                                   TemplateTemplateParmDecl *D) {
   // Instantiate the template parameter list of the template template parameter.
   TemplateParameterList *TempParams = D->getTemplateParameters();
   TemplateParameterList *InstParams;
-  {
+  SmallVector<TemplateParameterList*, 8> ExpandedParams;
+
+  bool IsExpandedParameterPack = false;
+
+  if (D->isExpandedParameterPack()) {
+    // The template template parameter pack is an already-expanded pack
+    // expansion of template parameters. Substitute into each of the expanded
+    // parameters.
+    ExpandedParams.reserve(D->getNumExpansionTemplateParameters());
+    for (unsigned I = 0, N = D->getNumExpansionTemplateParameters();
+         I != N; ++I) {
+      LocalInstantiationScope Scope(SemaRef);
+      TemplateParameterList *Expansion =
+        SubstTemplateParams(D->getExpansionTemplateParameters(I));
+      if (!Expansion)
+        return 0;
+      ExpandedParams.push_back(Expansion);
+    }
+
+    IsExpandedParameterPack = true;
+    InstParams = TempParams;
+  } else if (D->isPackExpansion()) {
+    // The template template parameter pack expands to a pack of template
+    // template parameters. Determine whether we need to expand this parameter
+    // pack into separate parameters.
+    SmallVector<UnexpandedParameterPack, 2> Unexpanded;
+    collectUnexpandedParameterPacks(SemaRef, D->getTemplateParameters(),
+                                    Unexpanded);
+
+    // Determine whether the set of unexpanded parameter packs can and should
+    // be expanded.
+    bool Expand = true;
+    bool RetainExpansion = false;
+    llvm::Optional<unsigned> NumExpansions;
+    if (SemaRef.CheckParameterPacksForExpansion(D->getLocation(),
+                                                TempParams->getSourceRange(),
+                                                Unexpanded,
+                                                TemplateArgs,
+                                                Expand, RetainExpansion,
+                                                NumExpansions))
+      return 0;
+
+    if (Expand) {
+      for (unsigned I = 0; I != *NumExpansions; ++I) {
+        Sema::ArgumentPackSubstitutionIndexRAII SubstIndex(SemaRef, I);
+        LocalInstantiationScope Scope(SemaRef);
+        TemplateParameterList *Expansion = SubstTemplateParams(TempParams);
+        if (!Expansion)
+          return 0;
+        ExpandedParams.push_back(Expansion);
+      }
+
+      // Note that we have an expanded parameter pack. The "type" of this
+      // expanded parameter pack is the original expansion type, but callers
+      // will end up using the expanded parameter pack types for type-checking.
+      IsExpandedParameterPack = true;
+      InstParams = TempParams;
+    } else {
+      // We cannot fully expand the pack expansion now, so just substitute
+      // into the pattern.
+      Sema::ArgumentPackSubstitutionIndexRAII SubstIndex(SemaRef, -1);
+
+      LocalInstantiationScope Scope(SemaRef);
+      InstParams = SubstTemplateParams(TempParams);
+      if (!InstParams)
+        return 0;
+    }
+  } else {
     // Perform the actual substitution of template parameters within a new,
     // local instantiation scope.
     LocalInstantiationScope Scope(SemaRef);
     InstParams = SubstTemplateParams(TempParams);
     if (!InstParams)
-      return NULL;
+      return 0;
   }
 
   // Build the template template parameter.
-  TemplateTemplateParmDecl *Param
-    = TemplateTemplateParmDecl::Create(SemaRef.Context, Owner, D->getLocation(),
+  TemplateTemplateParmDecl *Param;
+  if (IsExpandedParameterPack)
+    Param = TemplateTemplateParmDecl::Create(SemaRef.Context, Owner,
+                                             D->getLocation(),
+                                   D->getDepth() - TemplateArgs.getNumLevels(),
+                                             D->getPosition(),
+                                             D->getIdentifier(), InstParams,
+                                             ExpandedParams);
+  else
+    Param = TemplateTemplateParmDecl::Create(SemaRef.Context, Owner,
+                                             D->getLocation(),
                                    D->getDepth() - TemplateArgs.getNumLevels(),
-                                       D->getPosition(), D->isParameterPack(),
-                                       D->getIdentifier(), InstParams);
+                                             D->getPosition(),
+                                             D->isParameterPack(),
+                                             D->getIdentifier(), InstParams);
   Param->setDefaultArgument(D->getDefaultArgument(), false);
   Param->setAccess(AS_public);
 
@@ -1813,7 +1947,12 @@ Decl *TemplateDeclInstantiator::VisitUsingDirectiveDecl(UsingDirectiveDecl *D) {
                                  D->getIdentLocation(),
                                  D->getNominatedNamespace(),
                                  D->getCommonAncestor());
-  Owner->addDecl(Inst);
+
+  // Add the using directive to its declaration context
+  // only if this is not a function or method.
+  if (!Owner->isFunctionOrMethod())
+    Owner->addDecl(Inst);
+
   return Inst;
 }
 
@@ -2863,7 +3002,7 @@ Sema::InstantiateMemInitializers(CXXConstructorDecl *New,
                            const MultiLevelTemplateArgumentList &TemplateArgs) {
 
   SmallVector<CXXCtorInitializer*, 4> NewInits;
-  bool AnyErrors = false;
+  bool AnyErrors = Tmpl->isInvalidDecl();
 
   // Instantiate all the initializers.
   for (CXXConstructorDecl::init_const_iterator Inits = Tmpl->init_begin(),
@@ -3031,7 +3170,7 @@ ExprResult Sema::SubstInitializer(Expr *Init,
       isa<CXXTemporaryObjectExpr>(Construct))
     return SubstExpr(Init, TemplateArgs);
 
-  ASTOwningVector<Expr*> NewArgs(*this);
+  SmallVector<Expr*, 8> NewArgs;
   if (SubstExprs(Construct->getArgs(), Construct->getNumArgs(), true,
                  TemplateArgs, NewArgs))
     return ExprError();
@@ -3043,7 +3182,7 @@ ExprResult Sema::SubstInitializer(Expr *Init,
   // Build a ParenListExpr to represent anything else.
   // FIXME: Fake locations!
   SourceLocation Loc = PP.getLocForEndOfToken(Init->getLocStart());
-  return ActOnParenListExpr(Loc, Loc, move_arg(NewArgs));
+  return ActOnParenListExpr(Loc, Loc, NewArgs);
 }
 
 // TODO: this could be templated if the various decl types used the
@@ -3298,7 +3437,8 @@ NamedDecl *Sema::FindInstantiatedDecl(SourceLocation Loc, NamedDecl *D,
       if (Decl *FD = Found->dyn_cast<Decl *>())
         return cast<NamedDecl>(FD);
 
-      unsigned PackIdx = ArgumentPackSubstitutionIndex;
+      int PackIdx = ArgumentPackSubstitutionIndex;
+      assert(PackIdx != -1 && "found declaration pack but not pack expanding");
       return cast<NamedDecl>((*Found->get<DeclArgumentPack *>())[PackIdx]);
     }
 
diff --git a/lib/Sema/SemaTemplateVariadic.cpp b/lib/Sema/SemaTemplateVariadic.cpp
index aece90b78590..6147d63ef44b 100644
--- a/lib/Sema/SemaTemplateVariadic.cpp
+++ b/lib/Sema/SemaTemplateVariadic.cpp
@@ -727,6 +727,7 @@ bool Sema::containsUnexpandedParameterPacks(Declarator &D) {
   case TST_enum:
   case TST_union:
   case TST_struct:
+  case TST_interface:
   case TST_class:
   case TST_auto:
   case TST_unknown_anytype:
diff --git a/lib/Sema/SemaType.cpp b/lib/Sema/SemaType.cpp
index 54f8dbaf0127..4b23167951aa 100644
--- a/lib/Sema/SemaType.cpp
+++ b/lib/Sema/SemaType.cpp
@@ -105,7 +105,8 @@ static void diagnoseBadTypeAttribute(Sema &S, const AttributeList &attr,
     case AttributeList::AT_ThisCall: \
     case AttributeList::AT_Pascal: \
     case AttributeList::AT_Regparm: \
-    case AttributeList::AT_Pcs \
+    case AttributeList::AT_Pcs: \
+    case AttributeList::AT_PnaclCall \
 
 namespace {
   /// An object which stores processing state for the entire
@@ -552,19 +553,28 @@ static void maybeSynthesizeBlockSignature(TypeProcessingState &state,
   SourceLocation loc = declarator.getLocStart();
 
   // ...and *prepend* it to the declarator.
+  SourceLocation NoLoc;
   declarator.AddInnermostTypeInfo(DeclaratorChunk::getFunction(
-                             /*proto*/ true,
-                             /*variadic*/ false,
-                             /*ambiguous*/ false, SourceLocation(),
-                             /*args*/ 0, 0,
-                             /*type quals*/ 0,
-                             /*ref-qualifier*/true, SourceLocation(),
-                             /*const qualifier*/SourceLocation(),
-                             /*volatile qualifier*/SourceLocation(),
-                             /*mutable qualifier*/SourceLocation(),
-                             /*EH*/ EST_None, SourceLocation(), 0, 0, 0, 0,
-                             /*parens*/ loc, loc,
-                             declarator));
+                             /*HasProto=*/true,
+                             /*IsAmbiguous=*/false,
+                             /*LParenLoc=*/NoLoc,
+                             /*ArgInfo=*/0,
+                             /*NumArgs=*/0,
+                             /*EllipsisLoc=*/NoLoc,
+                             /*RParenLoc=*/NoLoc,
+                             /*TypeQuals=*/0,
+                             /*RefQualifierIsLvalueRef=*/true,
+                             /*RefQualifierLoc=*/NoLoc,
+                             /*ConstQualifierLoc=*/NoLoc,
+                             /*VolatileQualifierLoc=*/NoLoc,
+                             /*MutableLoc=*/NoLoc,
+                             EST_None,
+                             /*ESpecLoc=*/NoLoc,
+                             /*Exceptions=*/0,
+                             /*ExceptionRanges=*/0,
+                             /*NumExceptions=*/0,
+                             /*NoexceptExpr=*/0,
+                             loc, loc, declarator));
 
   // For consistency, make sure the state still has us as processing
   // the decl spec.
@@ -636,7 +646,7 @@ static QualType ConvertDeclSpecToType(TypeProcessingState &state) {
     // "<proto1,proto2>" is an objc qualified ID with a missing id.
     if (DeclSpec::ProtocolQualifierListTy PQ = DS.getProtocolQualifiers()) {
       Result = Context.getObjCObjectType(Context.ObjCBuiltinIdTy,
-                                         (ObjCProtocolDecl**)PQ,
+                                         (ObjCProtocolDecl*const*)PQ,
                                          DS.getNumProtocolQualifiers());
       Result = Context.getObjCObjectPointerType(Result);
       break;
@@ -698,11 +708,15 @@ static QualType ConvertDeclSpecToType(TypeProcessingState &state) {
       case DeclSpec::TSW_longlong:
         Result = Context.LongLongTy;
 
-        // long long is a C99 feature.
-        if (!S.getLangOpts().C99)
-          S.Diag(DS.getTypeSpecWidthLoc(),
-                 S.getLangOpts().CPlusPlus0x ?
-                   diag::warn_cxx98_compat_longlong : diag::ext_longlong);
+        // 'long long' is a C99 or C++11 feature.
+        if (!S.getLangOpts().C99) {
+          if (S.getLangOpts().CPlusPlus)
+            S.Diag(DS.getTypeSpecWidthLoc(),
+                   S.getLangOpts().CPlusPlus0x ?
+                   diag::warn_cxx98_compat_longlong : diag::ext_cxx11_longlong);
+          else
+            S.Diag(DS.getTypeSpecWidthLoc(), diag::ext_c99_longlong);
+        }
         break;
       }
     } else {
@@ -713,11 +727,15 @@ static QualType ConvertDeclSpecToType(TypeProcessingState &state) {
       case DeclSpec::TSW_longlong:
         Result = Context.UnsignedLongLongTy;
 
-        // long long is a C99 feature.
-        if (!S.getLangOpts().C99)
-          S.Diag(DS.getTypeSpecWidthLoc(),
-                 S.getLangOpts().CPlusPlus0x ?
-                   diag::warn_cxx98_compat_longlong : diag::ext_longlong);
+        // 'long long' is a C99 or C++11 feature.
+        if (!S.getLangOpts().C99) {
+          if (S.getLangOpts().CPlusPlus)
+            S.Diag(DS.getTypeSpecWidthLoc(),
+                   S.getLangOpts().CPlusPlus0x ?
+                   diag::warn_cxx98_compat_longlong : diag::ext_cxx11_longlong);
+          else
+            S.Diag(DS.getTypeSpecWidthLoc(), diag::ext_c99_longlong);
+        }
         break;
       }
     }
@@ -753,7 +771,8 @@ static QualType ConvertDeclSpecToType(TypeProcessingState &state) {
   case DeclSpec::TST_class:
   case DeclSpec::TST_enum:
   case DeclSpec::TST_union:
-  case DeclSpec::TST_struct: {
+  case DeclSpec::TST_struct:
+  case DeclSpec::TST_interface: {
     TypeDecl *D = dyn_cast_or_null<TypeDecl>(DS.getRepAsDecl());
     if (!D) {
       // This can happen in C++ with ambiguous lookups.
@@ -794,18 +813,18 @@ static QualType ConvertDeclSpecToType(TypeProcessingState &state) {
 
         if (DS.getNumProtocolQualifiers())
           Result = Context.getObjCObjectType(Result,
-                                             (ObjCProtocolDecl**) PQ,
+                                             (ObjCProtocolDecl*const*) PQ,
                                              DS.getNumProtocolQualifiers());
       } else if (Result->isObjCIdType()) {
         // id<protocol-list>
         Result = Context.getObjCObjectType(Context.ObjCBuiltinIdTy,
-                                           (ObjCProtocolDecl**) PQ,
+                                           (ObjCProtocolDecl*const*) PQ,
                                            DS.getNumProtocolQualifiers());
         Result = Context.getObjCObjectPointerType(Result);
       } else if (Result->isObjCClassType()) {
         // Class<protocol-list>
         Result = Context.getObjCObjectType(Context.ObjCBuiltinClassTy,
-                                           (ObjCProtocolDecl**) PQ,
+                                           (ObjCProtocolDecl*const*) PQ,
                                            DS.getNumProtocolQualifiers());
         Result = Context.getObjCObjectPointerType(Result);
       } else {
@@ -1853,30 +1872,31 @@ static QualType GetDeclSpecTypeForDeclarator(TypeProcessingState &state,
       case TTK_Struct: Error = 1; /* Struct member */ break;
       case TTK_Union:  Error = 2; /* Union member */ break;
       case TTK_Class:  Error = 3; /* Class member */ break;
+      case TTK_Interface: Error = 4; /* Interface member */ break;
       }
       break;
     case Declarator::CXXCatchContext:
     case Declarator::ObjCCatchContext:
-      Error = 4; // Exception declaration
+      Error = 5; // Exception declaration
       break;
     case Declarator::TemplateParamContext:
-      Error = 5; // Template parameter
+      Error = 6; // Template parameter
       break;
     case Declarator::BlockLiteralContext:
-      Error = 6; // Block literal
+      Error = 7; // Block literal
       break;
     case Declarator::TemplateTypeArgContext:
-      Error = 7; // Template type argument
+      Error = 8; // Template type argument
       break;
     case Declarator::AliasDeclContext:
     case Declarator::AliasTemplateContext:
-      Error = 9; // Type alias
+      Error = 10; // Type alias
       break;
     case Declarator::TrailingReturnContext:
-      Error = 10; // Function return type
+      Error = 11; // Function return type
       break;
     case Declarator::TypeNameContext:
-      Error = 11; // Generic
+      Error = 12; // Generic
       break;
     case Declarator::FileContext:
     case Declarator::BlockContext:
@@ -1887,11 +1907,11 @@ static QualType GetDeclSpecTypeForDeclarator(TypeProcessingState &state,
     }
 
     if (D.getDeclSpec().getStorageClassSpec() == DeclSpec::SCS_typedef)
-      Error = 8;
+      Error = 9;
 
     // In Objective-C it is an error to use 'auto' on a function declarator.
     if (D.isFunctionDeclarator())
-      Error = 10;
+      Error = 11;
 
     // C++11 [dcl.spec.auto]p2: 'auto' is always fine if the declarator
     // contains a trailing return type. That is only legal at the outermost
@@ -2149,16 +2169,6 @@ static TypeSourceInfo *GetFullTypeForDeclarator(TypeProcessingState &state,
   ASTContext &Context = S.Context;
   const LangOptions &LangOpts = S.getLangOpts();
 
-  bool ImplicitlyNoexcept = false;
-  if (D.getName().getKind() == UnqualifiedId::IK_OperatorFunctionId &&
-      LangOpts.CPlusPlus0x) {
-    OverloadedOperatorKind OO = D.getName().OperatorFunctionId.Operator;
-    /// In C++0x, deallocation functions (normal and array operator delete)
-    /// are implicitly noexcept.
-    if (OO == OO_Delete || OO == OO_Array_Delete)
-      ImplicitlyNoexcept = true;
-  }
-
   // The name we're declaring, if any.
   DeclarationName Name;
   if (D.getIdentifier())
@@ -2558,12 +2568,6 @@ static TypeSourceInfo *GetFullTypeForDeclarator(TypeProcessingState &state,
                                       Exceptions,
                                       EPI);
 
-        if (FTI.getExceptionSpecType() == EST_None &&
-            ImplicitlyNoexcept && chunkIndex == 0) {
-          // Only the outermost chunk is marked noexcept, of course.
-          EPI.ExceptionSpecType = EST_BasicNoexcept;
-        }
-
         T = Context.getFunctionType(T, ArgTys.data(), ArgTys.size(), EPI);
       }
 
@@ -2657,6 +2661,9 @@ static TypeSourceInfo *GetFullTypeForDeclarator(TypeProcessingState &state,
 
     // C++0x [dcl.constexpr]p8: A constexpr specifier for a non-static member
     // function that is not a constructor declares that function to be const.
+    // FIXME: This should be deferred until we know whether this is a static
+    //        member function (for an out-of-class definition, we don't know
+    //        this until we perform redeclaration lookup).
     if (D.getDeclSpec().isConstexprSpecified() && !FreeFunction &&
         D.getDeclSpec().getStorageClassSpec() != DeclSpec::SCS_static &&
         D.getName().getKind() != UnqualifiedId::IK_ConstructorName &&
@@ -2668,6 +2675,12 @@ static TypeSourceInfo *GetFullTypeForDeclarator(TypeProcessingState &state,
       T = Context.getFunctionType(FnTy->getResultType(),
                                   FnTy->arg_type_begin(),
                                   FnTy->getNumArgs(), EPI);
+      // Rebuild any parens around the identifier in the function type.
+      for (unsigned i = 0, e = D.getNumTypeObjects(); i != e; ++i) {
+        if (D.getTypeObject(i).Kind != DeclaratorChunk::Paren)
+          break;
+        T = S.BuildParenType(T);
+      }
     }
 
     // C++11 [dcl.fct]p6 (w/DR1417):
@@ -2721,6 +2734,12 @@ static TypeSourceInfo *GetFullTypeForDeclarator(TypeProcessingState &state,
       T = Context.getFunctionType(FnTy->getResultType(),
                                   FnTy->arg_type_begin(),
                                   FnTy->getNumArgs(), EPI);
+      // Rebuild any parens around the identifier in the function type.
+      for (unsigned i = 0, e = D.getNumTypeObjects(); i != e; ++i) {
+        if (D.getTypeObject(i).Kind != DeclaratorChunk::Paren)
+          break;
+        T = S.BuildParenType(T);
+      }
     }
   }
 
@@ -2985,6 +3004,8 @@ static AttributeList::Kind getAttrListKind(AttributedType::Kind kind) {
     return AttributeList::AT_Pascal;
   case AttributedType::attr_pcs:
     return AttributeList::AT_Pcs;
+  case AttributedType::attr_pnaclcall:
+    return AttributeList::AT_PnaclCall;
   }
   llvm_unreachable("unexpected attribute kind!");
 }
@@ -3271,6 +3292,8 @@ namespace {
       TL.setLocalRangeEnd(Chunk.EndLoc);
 
       const DeclaratorChunk::FunctionTypeInfo &FTI = Chunk.Fun;
+      TL.setLParenLoc(FTI.getLParenLoc());
+      TL.setRParenLoc(FTI.getRParenLoc());
       for (unsigned i = 0, e = TL.getNumArgs(), tpi = 0; i != e; ++i) {
         ParmVarDecl *Param = cast<ParmVarDecl>(FTI.ArgInfo[i].Param);
         TL.setArg(tpi++, Param);
@@ -3588,7 +3611,7 @@ static bool handleObjCOwnershipTypeAttr(TypeProcessingState &state,
 
   // Forbid __weak if the runtime doesn't support it.
   if (lifetime == Qualifiers::OCL_Weak &&
-      !S.getLangOpts().ObjCRuntimeHasWeak && !NonObjCPointer) {
+      !S.getLangOpts().ObjCARCWeak && !NonObjCPointer) {
 
     // Actually, delay this until we know what we're parsing.
     if (S.DelayedDiagnostics.shouldDelayDiagnostics()) {
@@ -3611,11 +3634,12 @@ static bool handleObjCOwnershipTypeAttr(TypeProcessingState &state,
     while (const PointerType *ptr = T->getAs<PointerType>())
       T = ptr->getPointeeType();
     if (const ObjCObjectPointerType *ObjT = T->getAs<ObjCObjectPointerType>()) {
-      ObjCInterfaceDecl *Class = ObjT->getInterfaceDecl();
-      if (Class->isArcWeakrefUnavailable()) {
-          S.Diag(AttrLoc, diag::err_arc_unsupported_weak_class);
-          S.Diag(ObjT->getInterfaceDecl()->getLocation(),
-                 diag::note_class_declared);
+      if (ObjCInterfaceDecl *Class = ObjT->getInterfaceDecl()) {
+        if (Class->isArcWeakrefUnavailable()) {
+            S.Diag(AttrLoc, diag::err_arc_unsupported_weak_class);
+            S.Diag(ObjT->getInterfaceDecl()->getLocation(),
+                   diag::note_class_declared);
+        }
       }
     }
   }
@@ -3875,14 +3899,14 @@ static bool handleFunctionTypeAttr(TypeProcessingState &state,
     return true;
   }
 
+  // Delay if the type didn't work out to a function.
+  if (!unwrapped.isFunctionType()) return false;
+
   // Otherwise, a calling convention.
   CallingConv CC;
   if (S.CheckCallingConvAttr(attr, CC))
     return true;
 
-  // Delay if the type didn't work out to a function.
-  if (!unwrapped.isFunctionType()) return false;
-
   const FunctionType *fn = unwrapped.get();
   CallingConv CCOld = fn->getCallConv();
   if (S.Context.getCanonicalCallConv(CC) ==
@@ -4429,6 +4453,20 @@ bool Sema::RequireCompleteType(SourceLocation Loc, QualType T,
   return RequireCompleteType(Loc, T, Diagnoser);
 }
 
+/// \brief Get diagnostic %select index for tag kind for
+/// literal type diagnostic message.
+/// WARNING: Indexes apply to particular diagnostics only!
+///
+/// \returns diagnostic %select index.
+static unsigned getLiteralDiagFromTagKind(TagTypeKind Tag) {
+  switch (Tag) {
+  case TTK_Struct: return 0;
+  case TTK_Interface: return 1;
+  case TTK_Class:  return 2;
+  default: llvm_unreachable("Invalid tag kind for literal type diagnostic!");
+  }
+}
+
 /// @brief Ensure that the type T is a literal type.
 ///
 /// This routine checks whether the type @p T is a literal type. If @p T is an
@@ -4485,7 +4523,7 @@ bool Sema::RequireLiteralType(SourceLocation Loc, QualType T,
   // of constexpr constructors.
   if (RD->getNumVBases()) {
     Diag(RD->getLocation(), diag::note_non_literal_virtual_base)
-      << RD->isStruct() << RD->getNumVBases();
+      << getLiteralDiagFromTagKind(RD->getTagKind()) << RD->getNumVBases();
     for (CXXRecordDecl::base_class_const_iterator I = RD->vbases_begin(),
            E = RD->vbases_end(); I != E; ++I)
       Diag(I->getLocStart(),
@@ -4578,15 +4616,21 @@ static QualType getDecltypeForExpr(Sema &S, Expr *E) {
   //       member access (5.2.5), decltype(e) is the type of the entity named
   //       by e. If there is no such entity, or if e names a set of overloaded
   //       functions, the program is ill-formed;
+  //
+  // We apply the same rules for Objective-C ivar and property references.
   if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E)) {
     if (const ValueDecl *VD = dyn_cast<ValueDecl>(DRE->getDecl()))
       return VD->getType();
-  }
-  if (const MemberExpr *ME = dyn_cast<MemberExpr>(E)) {
+  } else if (const MemberExpr *ME = dyn_cast<MemberExpr>(E)) {
     if (const FieldDecl *FD = dyn_cast<FieldDecl>(ME->getMemberDecl()))
       return FD->getType();
+  } else if (const ObjCIvarRefExpr *IR = dyn_cast<ObjCIvarRefExpr>(E)) {
+    return IR->getDecl()->getType();
+  } else if (const ObjCPropertyRefExpr *PR = dyn_cast<ObjCPropertyRefExpr>(E)) {
+    if (PR->isExplicitProperty())
+      return PR->getExplicitProperty()->getType();
   }
-
+  
   // C++11 [expr.lambda.prim]p18:
   //   Every occurrence of decltype((x)) where x is a possibly
   //   parenthesized id-expression that names an entity of automatic
diff --git a/lib/Sema/TreeTransform.h b/lib/Sema/TreeTransform.h
index 619ad330b95b..294d74244673 100644
--- a/lib/Sema/TreeTransform.h
+++ b/lib/Sema/TreeTransform.h
@@ -574,6 +574,10 @@ public:
   /// \brief Transform the captures and body of a lambda expression.
   ExprResult TransformLambdaScope(LambdaExpr *E, CXXMethodDecl *CallOperator);
 
+  ExprResult TransformAddressOfOperand(Expr *E);
+  ExprResult TransformDependentScopeDeclRefExpr(DependentScopeDeclRefExpr *E,
+                                                bool IsAddressOfOperand);
+
 #define STMT(Node, Parent)                        \
   StmtResult Transform##Node(Node *S);
 #define EXPR(Node, Parent)                        \
@@ -1162,32 +1166,23 @@ public:
   ///
   /// By default, performs semantic analysis to build the new statement.
   /// Subclasses may override this routine to provide different behavior.
-  StmtResult RebuildAsmStmt(SourceLocation AsmLoc,
-                                  bool IsSimple,
-                                  bool IsVolatile,
-                                  unsigned NumOutputs,
-                                  unsigned NumInputs,
-                                  IdentifierInfo **Names,
-                                  MultiExprArg Constraints,
-                                  MultiExprArg Exprs,
-                                  Expr *AsmString,
-                                  MultiExprArg Clobbers,
-                                  SourceLocation RParenLoc,
-                                  bool MSAsm) {
-    return getSema().ActOnAsmStmt(AsmLoc, IsSimple, IsVolatile, NumOutputs,
-                                  NumInputs, Names, move(Constraints),
-                                  Exprs, AsmString, Clobbers,
-                                  RParenLoc, MSAsm);
+  StmtResult RebuildGCCAsmStmt(SourceLocation AsmLoc, bool IsSimple,
+                               bool IsVolatile, unsigned NumOutputs,
+                               unsigned NumInputs, IdentifierInfo **Names,
+                               MultiExprArg Constraints, MultiExprArg Exprs,
+                               Expr *AsmString, MultiExprArg Clobbers,
+                               SourceLocation RParenLoc) {
+    return getSema().ActOnGCCAsmStmt(AsmLoc, IsSimple, IsVolatile, NumOutputs,
+                                     NumInputs, Names, Constraints, Exprs,
+                                     AsmString, Clobbers, RParenLoc);
   }
 
   /// \brief Build a new MS style inline asm statement.
   ///
   /// By default, performs semantic analysis to build the new statement.
   /// Subclasses may override this routine to provide different behavior.
-  StmtResult RebuildMSAsmStmt(SourceLocation AsmLoc,
-                              SourceLocation LBraceLoc,
-                              ArrayRef<Token> AsmToks,
-                              SourceLocation EndLoc) {
+  StmtResult RebuildMSAsmStmt(SourceLocation AsmLoc, SourceLocation LBraceLoc,
+                              ArrayRef<Token> AsmToks, SourceLocation EndLoc) {
     return getSema().ActOnMSAsmStmt(AsmLoc, LBraceLoc, AsmToks, EndLoc);
   }
 
@@ -1199,7 +1194,7 @@ public:
                                         Stmt *TryBody,
                                         MultiStmtArg CatchStmts,
                                         Stmt *Finally) {
-    return getSema().ActOnObjCAtTryStmt(AtLoc, TryBody, move(CatchStmts),
+    return getSema().ActOnObjCAtTryStmt(AtLoc, TryBody, CatchStmts,
                                         Finally);
   }
 
@@ -1325,7 +1320,7 @@ public:
   StmtResult RebuildCXXTryStmt(SourceLocation TryLoc,
                                Stmt *TryBlock,
                                MultiStmtArg Handlers) {
-    return getSema().ActOnCXXTryBlock(TryLoc, TryBlock, move(Handlers));
+    return getSema().ActOnCXXTryBlock(TryLoc, TryBlock, Handlers);
   }
 
   /// \brief Build a new C++0x range-based for statement.
@@ -1339,7 +1334,8 @@ public:
                                     Stmt *LoopVar,
                                     SourceLocation RParenLoc) {
     return getSema().BuildCXXForRangeStmt(ForLoc, ColonLoc, Range, BeginEnd,
-                                          Cond, Inc, LoopVar, RParenLoc);
+                                          Cond, Inc, LoopVar, RParenLoc,
+                                          Sema::BFRK_Rebuild);
   }
 
   /// \brief Build a new C++0x range-based for statement.
@@ -1478,7 +1474,7 @@ public:
     if (Result.isInvalid())
       return ExprError();
 
-    return move(Result);
+    return Result;
   }
 
   /// \brief Build a new array subscript expression.
@@ -1503,7 +1499,7 @@ public:
                                    SourceLocation RParenLoc,
                                    Expr *ExecConfig = 0) {
     return getSema().ActOnCallExpr(/*Scope=*/0, Callee, LParenLoc,
-                                   move(Args), RParenLoc, ExecConfig);
+                                   Args, RParenLoc, ExecConfig);
   }
 
   /// \brief Build a new member access expression.
@@ -1638,15 +1634,15 @@ public:
                              SourceLocation RBraceLoc,
                              QualType ResultTy) {
     ExprResult Result
-      = SemaRef.ActOnInitList(LBraceLoc, move(Inits), RBraceLoc);
+      = SemaRef.ActOnInitList(LBraceLoc, Inits, RBraceLoc);
     if (Result.isInvalid() || ResultTy->isDependentType())
-      return move(Result);
+      return Result;
 
     // Patch in the result type we were given, which may have been computed
     // when the initial InitListExpr was built.
     InitListExpr *ILE = cast<InitListExpr>((Expr *)Result.get());
     ILE->setType(ResultTy);
-    return move(Result);
+    return Result;
   }
 
   /// \brief Build a new designated initializer expression.
@@ -1664,8 +1660,7 @@ public:
     if (Result.isInvalid())
       return ExprError();
 
-    ArrayExprs.release();
-    return move(Result);
+    return Result;
   }
 
   /// \brief Build a new value-initialized expression.
@@ -1696,7 +1691,7 @@ public:
   ExprResult RebuildParenListExpr(SourceLocation LParenLoc,
                                   MultiExprArg SubExprs,
                                   SourceLocation RParenLoc) {
-    return getSema().ActOnParenListExpr(LParenLoc, RParenLoc, move(SubExprs));
+    return getSema().ActOnParenListExpr(LParenLoc, RParenLoc, SubExprs);
   }
 
   /// \brief Build a new address-of-label expression.
@@ -1974,8 +1969,7 @@ public:
                                            SourceLocation LParenLoc,
                                            SourceLocation RParenLoc) {
     return getSema().BuildCXXTypeConstructExpr(TSInfo, LParenLoc,
-                                               MultiExprArg(getSema(), 0, 0),
-                                               RParenLoc);
+                                               MultiExprArg(), RParenLoc);
   }
 
   /// \brief Build a new C++ "new" expression.
@@ -1995,7 +1989,7 @@ public:
                                Expr *Initializer) {
     return getSema().BuildCXXNew(StartLoc, UseGlobal,
                                  PlacementLParen,
-                                 move(PlacementArgs),
+                                 PlacementArgs,
                                  PlacementRParen,
                                  TypeIdParens,
                                  AllocatedType,
@@ -2083,7 +2077,8 @@ public:
                                           NestedNameSpecifierLoc QualifierLoc,
                                           SourceLocation TemplateKWLoc,
                                        const DeclarationNameInfo &NameInfo,
-                              const TemplateArgumentListInfo *TemplateArgs) {
+                              const TemplateArgumentListInfo *TemplateArgs,
+                                          bool IsAddressOfOperand) {
     CXXScopeSpec SS;
     SS.Adopt(QualifierLoc);
 
@@ -2091,7 +2086,8 @@ public:
       return getSema().BuildQualifiedTemplateIdExpr(SS, TemplateKWLoc,
                                                     NameInfo, TemplateArgs);
 
-    return getSema().BuildQualifiedDeclarationNameExpr(SS, NameInfo);
+    return getSema().BuildQualifiedDeclarationNameExpr(SS, NameInfo,
+                                                       IsAddressOfOperand);
   }
 
   /// \brief Build a new template-id expression.
@@ -2120,13 +2116,13 @@ public:
                                      bool RequiresZeroInit,
                              CXXConstructExpr::ConstructionKind ConstructKind,
                                      SourceRange ParenRange) {
-    ASTOwningVector<Expr*> ConvertedArgs(SemaRef);
-    if (getSema().CompleteConstructorCall(Constructor, move(Args), Loc,
+    SmallVector<Expr*, 8> ConvertedArgs;
+    if (getSema().CompleteConstructorCall(Constructor, Args, Loc,
                                           ConvertedArgs))
       return ExprError();
 
     return getSema().BuildCXXConstructExpr(Loc, T, Constructor, IsElidable,
-                                           move_arg(ConvertedArgs),
+                                           ConvertedArgs,
                                            HadMultipleCandidates,
                                            RequiresZeroInit, ConstructKind,
                                            ParenRange);
@@ -2142,7 +2138,7 @@ public:
                                            SourceLocation RParenLoc) {
     return getSema().BuildCXXTypeConstructExpr(TSInfo,
                                                LParenLoc,
-                                               move(Args),
+                                               Args,
                                                RParenLoc);
   }
 
@@ -2156,7 +2152,7 @@ public:
                                                SourceLocation RParenLoc) {
     return getSema().BuildCXXTypeConstructExpr(TSInfo,
                                                LParenLoc,
-                                               move(Args),
+                                               Args,
                                                RParenLoc);
   }
 
@@ -2288,7 +2284,7 @@ public:
                                      ReceiverTypeInfo->getType(),
                                      /*SuperLoc=*/SourceLocation(),
                                      Sel, Method, LBracLoc, SelectorLocs,
-                                     RBracLoc, move(Args));
+                                     RBracLoc, Args);
   }
 
   /// \brief Build a new Objective-C instance message.
@@ -2303,7 +2299,7 @@ public:
                                         Receiver->getType(),
                                         /*SuperLoc=*/SourceLocation(),
                                         Sel, Method, LBracLoc, SelectorLocs,
-                                        RBracLoc, move(Args));
+                                        RBracLoc, Args);
   }
 
   /// \brief Build a new Objective-C ivar reference expression.
@@ -2326,7 +2322,7 @@ public:
       return ExprError();
 
     if (Result.get())
-      return move(Result);
+      return Result;
 
     return getSema().BuildMemberReferenceExpr(Base.get(), Base.get()->getType(),
                                               /*FIXME:*/IvarLoc, IsArrow,
@@ -2355,7 +2351,7 @@ public:
       return ExprError();
 
     if (Result.get())
-      return move(Result);
+      return Result;
 
     return getSema().BuildMemberReferenceExpr(Base.get(), Base.get()->getType(),
                                               /*FIXME:*/PropertyLoc, IsArrow,
@@ -2398,7 +2394,7 @@ public:
       return ExprError();
 
     if (Result.get())
-      return move(Result);
+      return Result;
 
     return getSema().BuildMemberReferenceExpr(Base.get(), Base.get()->getType(),
                                               /*FIXME:*/IsaLoc, IsArrow,
@@ -2424,21 +2420,17 @@ public:
 
     // Build a reference to the __builtin_shufflevector builtin
     FunctionDecl *Builtin = cast<FunctionDecl>(*Lookup.first);
-    ExprResult Callee
-      = SemaRef.Owned(new (SemaRef.Context) DeclRefExpr(Builtin, false,
-                                                        Builtin->getType(),
-                                                        VK_LValue, BuiltinLoc));
-    Callee = SemaRef.UsualUnaryConversions(Callee.take());
-    if (Callee.isInvalid())
-      return ExprError();
+    Expr *Callee = new (SemaRef.Context) DeclRefExpr(Builtin, false,
+                                                  SemaRef.Context.BuiltinFnTy,
+                                                  VK_RValue, BuiltinLoc);
+    QualType CalleePtrTy = SemaRef.Context.getPointerType(Builtin->getType());
+    Callee = SemaRef.ImpCastExprToType(Callee, CalleePtrTy,
+                                       CK_BuiltinFnToFnPtr).take();
 
     // Build the CallExpr
-    unsigned NumSubExprs = SubExprs.size();
-    Expr **Subs = (Expr **)SubExprs.release();
     ExprResult TheCall = SemaRef.Owned(
-      new (SemaRef.Context) CallExpr(SemaRef.Context, Callee.take(),
-                                                       Subs, NumSubExprs,
-                                                   Builtin->getCallResultType(),
+      new (SemaRef.Context) CallExpr(SemaRef.Context, Callee, SubExprs,
+                                     Builtin->getCallResultType(),
                             Expr::getValueKindForType(Builtin->getResultType()),
                                      RParenLoc));
 
@@ -2478,6 +2470,7 @@ public:
     case TemplateArgument::Declaration:
     case TemplateArgument::Pack:
     case TemplateArgument::TemplateExpansion:
+    case TemplateArgument::NullPtr:
       llvm_unreachable("Pack expansion pattern has no parameter packs");
 
     case TemplateArgument::Type:
@@ -2515,10 +2508,7 @@ public:
     // Just create the expression; there is not any interesting semantic
     // analysis here because we can't actually build an AtomicExpr until
     // we are sure it is semantically sound.
-    unsigned NumSubExprs = SubExprs.size();
-    Expr **Subs = (Expr **)SubExprs.release();
-    return new (SemaRef.Context) AtomicExpr(BuiltinLoc, Subs,
-                                            NumSubExprs, RetTy, Op,
+    return new (SemaRef.Context) AtomicExpr(BuiltinLoc, SubExprs, RetTy, Op,
                                             RParenLoc);
   }
 
@@ -2963,6 +2953,7 @@ void TreeTransform<Derived>::InventTemplateArgumentLoc(
   case TemplateArgument::Declaration:
   case TemplateArgument::Integral:
   case TemplateArgument::Pack:
+  case TemplateArgument::NullPtr:
     Output = TemplateArgumentLoc(Arg, TemplateArgumentLocInfo());
     break;
   }
@@ -2976,8 +2967,10 @@ bool TreeTransform<Derived>::TransformTemplateArgument(
   switch (Arg.getKind()) {
   case TemplateArgument::Null:
   case TemplateArgument::Integral:
-    Output = Input;
-    return false;
+  case TemplateArgument::Pack:
+  case TemplateArgument::Declaration:
+  case TemplateArgument::NullPtr:
+    llvm_unreachable("Unexpected TemplateArgument");
 
   case TemplateArgument::Type: {
     TypeSourceInfo *DI = Input.getTypeSourceInfo();
@@ -2991,28 +2984,6 @@ bool TreeTransform<Derived>::TransformTemplateArgument(
     return false;
   }
 
-  case TemplateArgument::Declaration: {
-    // FIXME: we should never have to transform one of these.
-    DeclarationName Name;
-    if (NamedDecl *ND = dyn_cast<NamedDecl>(Arg.getAsDecl()))
-      Name = ND->getDeclName();
-    TemporaryBase Rebase(*this, Input.getLocation(), Name);
-    Decl *D = getDerived().TransformDecl(Input.getLocation(), Arg.getAsDecl());
-    if (!D) return true;
-
-    Expr *SourceExpr = Input.getSourceDeclExpression();
-    if (SourceExpr) {
-      EnterExpressionEvaluationContext Unevaluated(getSema(),
-                                                   Sema::ConstantEvaluated);
-      ExprResult E = getDerived().TransformExpr(SourceExpr);
-      E = SemaRef.ActOnConstantExpression(E);
-      SourceExpr = (E.isInvalid() ? 0 : E.take());
-    }
-
-    Output = TemplateArgumentLoc(TemplateArgument(D), SourceExpr);
-    return false;
-  }
-
   case TemplateArgument::Template: {
     NestedNameSpecifierLoc QualifierLoc = Input.getTemplateQualifierLoc();
     if (QualifierLoc) {
@@ -3051,35 +3022,6 @@ bool TreeTransform<Derived>::TransformTemplateArgument(
     Output = TemplateArgumentLoc(TemplateArgument(E.take()), E.take());
     return false;
   }
-
-  case TemplateArgument::Pack: {
-    SmallVector<TemplateArgument, 4> TransformedArgs;
-    TransformedArgs.reserve(Arg.pack_size());
-    for (TemplateArgument::pack_iterator A = Arg.pack_begin(),
-                                      AEnd = Arg.pack_end();
-         A != AEnd; ++A) {
-
-      // FIXME: preserve source information here when we start
-      // caring about parameter packs.
-
-      TemplateArgumentLoc InputArg;
-      TemplateArgumentLoc OutputArg;
-      getDerived().InventTemplateArgumentLoc(*A, InputArg);
-      if (getDerived().TransformTemplateArgument(InputArg, OutputArg))
-        return true;
-
-      TransformedArgs.push_back(OutputArg.getArgument());
-    }
-
-    TemplateArgument *TransformedArgsPtr
-      = new (getSema().Context) TemplateArgument[TransformedArgs.size()];
-    std::copy(TransformedArgs.begin(), TransformedArgs.end(),
-              TransformedArgsPtr);
-    Output = TemplateArgumentLoc(TemplateArgument(TransformedArgsPtr,
-                                                  TransformedArgs.size()),
-                                 Input.getLocInfo());
-    return false;
-  }
   }
 
   // Work around bogus GCC warning
@@ -4260,6 +4202,8 @@ TreeTransform<Derived>::TransformFunctionProtoType(TypeLocBuilder &TLB,
 
   FunctionProtoTypeLoc NewTL = TLB.push<FunctionProtoTypeLoc>(Result);
   NewTL.setLocalRangeBegin(TL.getLocalRangeBegin());
+  NewTL.setLParenLoc(TL.getLParenLoc());
+  NewTL.setRParenLoc(TL.getRParenLoc());
   NewTL.setLocalRangeEnd(TL.getLocalRangeEnd());
   for (unsigned i = 0, e = NewTL.getNumArgs(); i != e; ++i)
     NewTL.setArg(i, ParamDecls[i]);
@@ -4283,6 +4227,8 @@ QualType TreeTransform<Derived>::TransformFunctionNoProtoType(
 
   FunctionNoProtoTypeLoc NewTL = TLB.push<FunctionNoProtoTypeLoc>(Result);
   NewTL.setLocalRangeBegin(TL.getLocalRangeBegin());
+  NewTL.setLParenLoc(TL.getLParenLoc());
+  NewTL.setRParenLoc(TL.getRParenLoc());
   NewTL.setLocalRangeEnd(TL.getLocalRangeEnd());
 
   return Result;
@@ -4339,7 +4285,8 @@ template<typename Derived>
 QualType TreeTransform<Derived>::TransformTypeOfExprType(TypeLocBuilder &TLB,
                                                       TypeOfExprTypeLoc TL) {
   // typeof expressions are not potentially evaluated contexts
-  EnterExpressionEvaluationContext Unevaluated(SemaRef, Sema::Unevaluated);
+  EnterExpressionEvaluationContext Unevaluated(SemaRef, Sema::Unevaluated,
+                                               Sema::ReuseLambdaContextDecl);
 
   ExprResult E = getDerived().TransformExpr(TL.getUnderlyingExpr());
   if (E.isInvalid())
@@ -5099,7 +5046,7 @@ TreeTransform<Derived>::TransformCompoundStmt(CompoundStmt *S,
 
   bool SubStmtInvalid = false;
   bool SubStmtChanged = false;
-  ASTOwningVector<Stmt*> Statements(getSema());
+  SmallVector<Stmt*, 8> Statements;
   for (CompoundStmt::body_iterator B = S->body_begin(), BEnd = S->body_end();
        B != BEnd; ++B) {
     StmtResult Result = getDerived().TransformStmt(*B);
@@ -5126,7 +5073,7 @@ TreeTransform<Derived>::TransformCompoundStmt(CompoundStmt *S,
     return SemaRef.Owned(S);
 
   return getDerived().RebuildCompoundStmt(S->getLBracLoc(),
-                                          move_arg(Statements),
+                                          Statements,
                                           S->getRBracLoc(),
                                           IsStmtExpr);
 }
@@ -5533,14 +5480,14 @@ TreeTransform<Derived>::TransformDeclStmt(DeclStmt *S) {
 
 template<typename Derived>
 StmtResult
-TreeTransform<Derived>::TransformAsmStmt(AsmStmt *S) {
+TreeTransform<Derived>::TransformGCCAsmStmt(GCCAsmStmt *S) {
 
-  ASTOwningVector<Expr*> Constraints(getSema());
-  ASTOwningVector<Expr*> Exprs(getSema());
+  SmallVector<Expr*, 8> Constraints;
+  SmallVector<Expr*, 8> Exprs;
   SmallVector<IdentifierInfo *, 4> Names;
 
   ExprResult AsmString;
-  ASTOwningVector<Expr*> Clobbers(getSema());
+  SmallVector<Expr*, 8> Clobbers;
 
   bool ExprsChanged = false;
 
@@ -5585,23 +5532,15 @@ TreeTransform<Derived>::TransformAsmStmt(AsmStmt *S) {
 
   // Go through the clobbers.
   for (unsigned I = 0, E = S->getNumClobbers(); I != E; ++I)
-    Clobbers.push_back(S->getClobber(I));
+    Clobbers.push_back(S->getClobberStringLiteral(I));
 
   // No need to transform the asm string literal.
   AsmString = SemaRef.Owned(S->getAsmString());
-
-  return getDerived().RebuildAsmStmt(S->getAsmLoc(),
-                                     S->isSimple(),
-                                     S->isVolatile(),
-                                     S->getNumOutputs(),
-                                     S->getNumInputs(),
-                                     Names.data(),
-                                     move_arg(Constraints),
-                                     move_arg(Exprs),
-                                     AsmString.get(),
-                                     move_arg(Clobbers),
-                                     S->getRParenLoc(),
-                                     S->isMSAsm());
+  return getDerived().RebuildGCCAsmStmt(S->getAsmLoc(), S->isSimple(),
+                                        S->isVolatile(), S->getNumOutputs(),
+                                        S->getNumInputs(), Names.data(),
+                                        Constraints, Exprs, AsmString.get(),
+                                        Clobbers, S->getRParenLoc());
 }
 
 template<typename Derived>
@@ -5624,7 +5563,7 @@ TreeTransform<Derived>::TransformObjCAtTryStmt(ObjCAtTryStmt *S) {
 
   // Transform the @catch statements (if present).
   bool AnyCatchChanged = false;
-  ASTOwningVector<Stmt*> CatchStmts(SemaRef);
+  SmallVector<Stmt*, 8> CatchStmts;
   for (unsigned I = 0, N = S->getNumCatchStmts(); I != N; ++I) {
     StmtResult Catch = getDerived().TransformStmt(S->getCatchStmt(I));
     if (Catch.isInvalid())
@@ -5651,7 +5590,7 @@ TreeTransform<Derived>::TransformObjCAtTryStmt(ObjCAtTryStmt *S) {
 
   // Build a new statement.
   return getDerived().RebuildObjCAtTryStmt(S->getAtTryLoc(), TryBody.get(),
-                                           move_arg(CatchStmts), Finally.get());
+                                           CatchStmts, Finally.get());
 }
 
 template<typename Derived>
@@ -5855,7 +5794,7 @@ TreeTransform<Derived>::TransformCXXTryStmt(CXXTryStmt *S) {
 
   // Transform the handlers.
   bool HandlerChanged = false;
-  ASTOwningVector<Stmt*> Handlers(SemaRef);
+  SmallVector<Stmt*, 8> Handlers;
   for (unsigned I = 0, N = S->getNumHandlers(); I != N; ++I) {
     StmtResult Handler
       = getDerived().TransformCXXCatchStmt(S->getHandler(I));
@@ -5872,7 +5811,7 @@ TreeTransform<Derived>::TransformCXXTryStmt(CXXTryStmt *S) {
     return SemaRef.Owned(S);
 
   return getDerived().RebuildCXXTryStmt(S->getTryLoc(), TryBlock.get(),
-                                        move_arg(Handlers));
+                                        Handlers);
 }
 
 template<typename Derived>
@@ -6205,10 +6144,22 @@ TreeTransform<Derived>::TransformParenExpr(ParenExpr *E) {
                                        E->getRParen());
 }
 
+/// \brief The operand of a unary address-of operator has special rules: it's
+/// allowed to refer to a non-static member of a class even if there's no 'this'
+/// object available.
+template<typename Derived>
+ExprResult
+TreeTransform<Derived>::TransformAddressOfOperand(Expr *E) {
+  if (DependentScopeDeclRefExpr *DRE = dyn_cast<DependentScopeDeclRefExpr>(E))
+    return getDerived().TransformDependentScopeDeclRefExpr(DRE, true);
+  else
+    return getDerived().TransformExpr(E);
+}
+
 template<typename Derived>
 ExprResult
 TreeTransform<Derived>::TransformUnaryOperator(UnaryOperator *E) {
-  ExprResult SubExpr = getDerived().TransformExpr(E->getSubExpr());
+  ExprResult SubExpr = TransformAddressOfOperand(E->getSubExpr());
   if (SubExpr.isInvalid())
     return ExprError();
 
@@ -6338,7 +6289,8 @@ TreeTransform<Derived>::TransformUnaryExprOrTypeTraitExpr(
   // C++0x [expr.sizeof]p1:
   //   The operand is either an expression, which is an unevaluated operand
   //   [...]
-  EnterExpressionEvaluationContext Unevaluated(SemaRef, Sema::Unevaluated);
+  EnterExpressionEvaluationContext Unevaluated(SemaRef, Sema::Unevaluated,
+                                               Sema::ReuseLambdaContextDecl);
 
   ExprResult SubExpr = getDerived().TransformExpr(E->getArgumentExpr());
   if (SubExpr.isInvalid())
@@ -6386,7 +6338,7 @@ TreeTransform<Derived>::TransformCallExpr(CallExpr *E) {
 
   // Transform arguments.
   bool ArgChanged = false;
-  ASTOwningVector<Expr*> Args(SemaRef);
+  SmallVector<Expr*, 8> Args;
   if (getDerived().TransformExprs(E->getArgs(), E->getNumArgs(), true, Args,
                                   &ArgChanged))
     return ExprError();
@@ -6394,13 +6346,13 @@ TreeTransform<Derived>::TransformCallExpr(CallExpr *E) {
   if (!getDerived().AlwaysRebuild() &&
       Callee.get() == E->getCallee() &&
       !ArgChanged)
-    return SemaRef.MaybeBindToTemporary(E);;
+    return SemaRef.MaybeBindToTemporary(E);
 
   // FIXME: Wrong source location information for the '('.
   SourceLocation FakeLParenLoc
     = ((Expr *)Callee.get())->getSourceRange().getBegin();
   return getDerived().RebuildCallExpr(Callee.get(), FakeLParenLoc,
-                                      move_arg(Args),
+                                      Args,
                                       E->getRParenLoc());
 }
 
@@ -6499,6 +6451,9 @@ TreeTransform<Derived>::TransformBinaryOperator(BinaryOperator *E) {
       RHS.get() == E->getRHS())
     return SemaRef.Owned(E);
 
+  Sema::FPContractStateRAII FPContractState(getSema());
+  getSema().FPFeatures.fp_contract = E->isFPContractable();
+
   return getDerived().RebuildBinaryOperator(E->getOperatorLoc(), E->getOpcode(),
                                             LHS.get(), RHS.get());
 }
@@ -6645,7 +6600,7 @@ ExprResult
 TreeTransform<Derived>::TransformInitListExpr(InitListExpr *E) {
   bool InitChanged = false;
 
-  ASTOwningVector<Expr*, 4> Inits(SemaRef);
+  SmallVector<Expr*, 4> Inits;
   if (getDerived().TransformExprs(E->getInits(), E->getNumInits(), false,
                                   Inits, &InitChanged))
     return ExprError();
@@ -6653,7 +6608,7 @@ TreeTransform<Derived>::TransformInitListExpr(InitListExpr *E) {
   if (!getDerived().AlwaysRebuild() && !InitChanged)
     return SemaRef.Owned(E);
 
-  return getDerived().RebuildInitList(E->getLBraceLoc(), move_arg(Inits),
+  return getDerived().RebuildInitList(E->getLBraceLoc(), Inits,
                                       E->getRBraceLoc(), E->getType());
 }
 
@@ -6668,7 +6623,7 @@ TreeTransform<Derived>::TransformDesignatedInitExpr(DesignatedInitExpr *E) {
     return ExprError();
 
   // transform the designators.
-  ASTOwningVector<Expr*, 4> ArrayExprs(SemaRef);
+  SmallVector<Expr*, 4> ArrayExprs;
   bool ExprChanged = false;
   for (DesignatedInitExpr::designators_iterator D = E->designators_begin(),
                                              DEnd = E->designators_end();
@@ -6720,7 +6675,7 @@ TreeTransform<Derived>::TransformDesignatedInitExpr(DesignatedInitExpr *E) {
       !ExprChanged)
     return SemaRef.Owned(E);
 
-  return getDerived().RebuildDesignatedInitExpr(Desig, move_arg(ArrayExprs),
+  return getDerived().RebuildDesignatedInitExpr(Desig, ArrayExprs,
                                                 E->getEqualOrColonLoc(),
                                                 E->usesGNUSyntax(), Init.get());
 }
@@ -6768,13 +6723,13 @@ template<typename Derived>
 ExprResult
 TreeTransform<Derived>::TransformParenListExpr(ParenListExpr *E) {
   bool ArgumentChanged = false;
-  ASTOwningVector<Expr*, 4> Inits(SemaRef);
+  SmallVector<Expr*, 4> Inits;
   if (TransformExprs(E->getExprs(), E->getNumExprs(), true, Inits,
                      &ArgumentChanged))
     return ExprError();
 
   return getDerived().RebuildParenListExpr(E->getLParenLoc(),
-                                           move_arg(Inits),
+                                           Inits,
                                            E->getRParenLoc());
 }
 
@@ -6875,13 +6830,13 @@ TreeTransform<Derived>::TransformCXXOperatorCallExpr(CXXOperatorCallExpr *E) {
                               static_cast<Expr *>(Object.get())->getLocEnd());
 
     // Transform the call arguments.
-    ASTOwningVector<Expr*> Args(SemaRef);
+    SmallVector<Expr*, 8> Args;
     if (getDerived().TransformExprs(E->getArgs() + 1, E->getNumArgs() - 1, true,
                                     Args))
       return ExprError();
 
     return getDerived().RebuildCallExpr(Object.get(), FakeLParenLoc,
-                                        move_arg(Args),
+                                        Args,
                                         E->getLocEnd());
   }
 
@@ -6905,7 +6860,11 @@ TreeTransform<Derived>::TransformCXXOperatorCallExpr(CXXOperatorCallExpr *E) {
   if (Callee.isInvalid())
     return ExprError();
 
-  ExprResult First = getDerived().TransformExpr(E->getArg(0));
+  ExprResult First;
+  if (E->getOperator() == OO_Amp)
+    First = getDerived().TransformAddressOfOperand(E->getArg(0));
+  else
+    First = getDerived().TransformExpr(E->getArg(0));
   if (First.isInvalid())
     return ExprError();
 
@@ -6922,6 +6881,9 @@ TreeTransform<Derived>::TransformCXXOperatorCallExpr(CXXOperatorCallExpr *E) {
       (E->getNumArgs() != 2 || Second.get() == E->getArg(1)))
     return SemaRef.MaybeBindToTemporary(E);
 
+  Sema::FPContractStateRAII FPContractState(getSema());
+  getSema().FPFeatures.fp_contract = E->isFPContractable();
+
   return getDerived().RebuildCXXOperatorCallExpr(E->getOperator(),
                                                  E->getOperatorLoc(),
                                                  Callee.get(),
@@ -6950,7 +6912,7 @@ TreeTransform<Derived>::TransformCUDAKernelCallExpr(CUDAKernelCallExpr *E) {
 
   // Transform arguments.
   bool ArgChanged = false;
-  ASTOwningVector<Expr*> Args(SemaRef);
+  SmallVector<Expr*, 8> Args;
   if (getDerived().TransformExprs(E->getArgs(), E->getNumArgs(), true, Args,
                                   &ArgChanged))
     return ExprError();
@@ -6964,7 +6926,7 @@ TreeTransform<Derived>::TransformCUDAKernelCallExpr(CUDAKernelCallExpr *E) {
   SourceLocation FakeLParenLoc
     = ((Expr *)Callee.get())->getSourceRange().getBegin();
   return getDerived().RebuildCallExpr(Callee.get(), FakeLParenLoc,
-                                      move_arg(Args),
+                                      Args,
                                       E->getRParenLoc(), EC.get());
 }
 
@@ -6989,9 +6951,6 @@ TreeTransform<Derived>::TransformCXXNamedCastExpr(CXXNamedCastExpr *E) {
   SourceLocation FakeLAngleLoc
     = SemaRef.PP.getLocForEndOfToken(E->getOperatorLoc());
   SourceLocation FakeRAngleLoc = E->getSubExpr()->getSourceRange().getBegin();
-  SourceLocation FakeRParenLoc
-    = SemaRef.PP.getLocForEndOfToken(
-                                  E->getSubExpr()->getSourceRange().getEnd());
   return getDerived().RebuildCXXNamedCastExpr(E->getOperatorLoc(),
                                               E->getStmtClass(),
                                               FakeLAngleLoc,
@@ -6999,7 +6958,7 @@ TreeTransform<Derived>::TransformCXXNamedCastExpr(CXXNamedCastExpr *E) {
                                               FakeRAngleLoc,
                                               FakeRAngleLoc,
                                               SubExpr.get(),
-                                              FakeRParenLoc);
+                                              E->getRParenLoc());
 }
 
 template<typename Derived>
@@ -7074,7 +7033,8 @@ TreeTransform<Derived>::TransformCXXTypeidExpr(CXXTypeidExpr *E) {
   // after we perform semantic analysis.  We speculatively assume it is
   // unevaluated; it will get fixed later if the subexpression is in fact
   // potentially evaluated.
-  EnterExpressionEvaluationContext Unevaluated(SemaRef, Sema::Unevaluated);
+  EnterExpressionEvaluationContext Unevaluated(SemaRef, Sema::Unevaluated,
+                                               Sema::ReuseLambdaContextDecl);
 
   ExprResult SubExpr = getDerived().TransformExpr(E->getExprOperand());
   if (SubExpr.isInvalid())
@@ -7222,7 +7182,7 @@ TreeTransform<Derived>::TransformCXXNewExpr(CXXNewExpr *E) {
 
   // Transform the placement arguments (if any).
   bool ArgumentChanged = false;
-  ASTOwningVector<Expr*> PlacementArgs(SemaRef);
+  SmallVector<Expr*, 8> PlacementArgs;
   if (getDerived().TransformExprs(E->getPlacementArgs(),
                                   E->getNumPlacementArgs(), true,
                                   PlacementArgs, &ArgumentChanged))
@@ -7313,7 +7273,7 @@ TreeTransform<Derived>::TransformCXXNewExpr(CXXNewExpr *E) {
   return getDerived().RebuildCXXNewExpr(E->getLocStart(),
                                         E->isGlobalNew(),
                                         /*FIXME:*/E->getLocStart(),
-                                        move_arg(PlacementArgs),
+                                        PlacementArgs,
                                         /*FIXME:*/E->getLocStart(),
                                         E->getTypeIdParens(),
                                         AllocType,
@@ -7512,7 +7472,8 @@ TreeTransform<Derived>::TransformUnresolvedLookupExpr(
   // If we have template arguments, rebuild them, then rebuild the
   // templateid expression.
   TemplateArgumentListInfo TransArgs(Old->getLAngleLoc(), Old->getRAngleLoc());
-  if (getDerived().TransformTemplateArguments(Old->getTemplateArgs(),
+  if (Old->hasExplicitTemplateArgs() &&
+      getDerived().TransformTemplateArguments(Old->getTemplateArgs(),
                                               Old->getNumTemplateArgs(),
                                               TransArgs))
     return ExprError();
@@ -7732,6 +7693,14 @@ template<typename Derived>
 ExprResult
 TreeTransform<Derived>::TransformDependentScopeDeclRefExpr(
                                                DependentScopeDeclRefExpr *E) {
+  return TransformDependentScopeDeclRefExpr(E, /*IsAddressOfOperand*/false);
+}
+
+template<typename Derived>
+ExprResult
+TreeTransform<Derived>::TransformDependentScopeDeclRefExpr(
+                                               DependentScopeDeclRefExpr *E,
+                                               bool IsAddressOfOperand) {
   NestedNameSpecifierLoc QualifierLoc
   = getDerived().TransformNestedNameSpecifierLoc(E->getQualifierLoc());
   if (!QualifierLoc)
@@ -7758,7 +7727,8 @@ TreeTransform<Derived>::TransformDependentScopeDeclRefExpr(
     return getDerived().RebuildDependentScopeDeclRefExpr(QualifierLoc,
                                                          TemplateKWLoc,
                                                          NameInfo,
-                                                         /*TemplateArgs*/ 0);
+                                                         /*TemplateArgs*/ 0,
+                                                         IsAddressOfOperand);
   }
 
   TemplateArgumentListInfo TransArgs(E->getLAngleLoc(), E->getRAngleLoc());
@@ -7770,7 +7740,8 @@ TreeTransform<Derived>::TransformDependentScopeDeclRefExpr(
   return getDerived().RebuildDependentScopeDeclRefExpr(QualifierLoc,
                                                        TemplateKWLoc,
                                                        NameInfo,
-                                                       &TransArgs);
+                                                       &TransArgs,
+                                                       IsAddressOfOperand);
 }
 
 template<typename Derived>
@@ -7796,7 +7767,7 @@ TreeTransform<Derived>::TransformCXXConstructExpr(CXXConstructExpr *E) {
     return ExprError();
 
   bool ArgumentChanged = false;
-  ASTOwningVector<Expr*> Args(SemaRef);
+  SmallVector<Expr*, 8> Args;
   if (getDerived().TransformExprs(E->getArgs(), E->getNumArgs(), true, Args,
                                   &ArgumentChanged))
     return ExprError();
@@ -7813,7 +7784,7 @@ TreeTransform<Derived>::TransformCXXConstructExpr(CXXConstructExpr *E) {
 
   return getDerived().RebuildCXXConstructExpr(T, /*FIXME:*/E->getLocStart(),
                                               Constructor, E->isElidable(),
-                                              move_arg(Args),
+                                              Args,
                                               E->hadMultipleCandidates(),
                                               E->requiresZeroInitialization(),
                                               E->getConstructionKind(),
@@ -7857,7 +7828,7 @@ TreeTransform<Derived>::TransformCXXTemporaryObjectExpr(
     return ExprError();
 
   bool ArgumentChanged = false;
-  ASTOwningVector<Expr*> Args(SemaRef);
+  SmallVector<Expr*, 8> Args;
   Args.reserve(E->getNumArgs());
   if (TransformExprs(E->getArgs(), E->getNumArgs(), true, Args,
                      &ArgumentChanged))
@@ -7874,19 +7845,13 @@ TreeTransform<Derived>::TransformCXXTemporaryObjectExpr(
 
   return getDerived().RebuildCXXTemporaryObjectExpr(T,
                                           /*FIXME:*/T->getTypeLoc().getEndLoc(),
-                                                    move_arg(Args),
+                                                    Args,
                                                     E->getLocEnd());
 }
 
 template<typename Derived>
 ExprResult
 TreeTransform<Derived>::TransformLambdaExpr(LambdaExpr *E) {
-  // Create the local class that will describe the lambda.
-  CXXRecordDecl *Class
-    = getSema().createLambdaClosureType(E->getIntroducerRange(),
-                                        /*KnownDependent=*/false);
-  getDerived().transformedLocalDecl(E->getLambdaClass(), Class);
-
   // Transform the type of the lambda parameters and start the definition of
   // the lambda itself.
   TypeSourceInfo *MethodTy
@@ -7894,6 +7859,13 @@ TreeTransform<Derived>::TransformLambdaExpr(LambdaExpr *E) {
   if (!MethodTy)
     return ExprError();
 
+  // Create the local class that will describe the lambda.
+  CXXRecordDecl *Class
+    = getSema().createLambdaClosureType(E->getIntroducerRange(),
+                                        MethodTy,
+                                        /*KnownDependent=*/false);
+  getDerived().transformedLocalDecl(E->getLambdaClass(), Class);
+
   // Transform lambda parameters.
   llvm::SmallVector<QualType, 4> ParamTypes;
   llvm::SmallVector<ParmVarDecl *, 4> Params;
@@ -8038,7 +8010,7 @@ TreeTransform<Derived>::TransformCXXUnresolvedConstructExpr(
     return ExprError();
 
   bool ArgumentChanged = false;
-  ASTOwningVector<Expr*> Args(SemaRef);
+  SmallVector<Expr*, 8> Args;
   Args.reserve(E->arg_size());
   if (getDerived().TransformExprs(E->arg_begin(), E->arg_size(), true, Args,
                                   &ArgumentChanged))
@@ -8052,7 +8024,7 @@ TreeTransform<Derived>::TransformCXXUnresolvedConstructExpr(
   // FIXME: we're faking the locations of the commas
   return getDerived().RebuildCXXUnresolvedConstructExpr(T,
                                                         E->getLParenLoc(),
-                                                        move_arg(Args),
+                                                        Args,
                                                         E->getRParenLoc());
 }
 
@@ -8346,6 +8318,13 @@ TreeTransform<Derived>::TransformSubstNonTypeTemplateParmExpr(
 
 template<typename Derived>
 ExprResult
+TreeTransform<Derived>::TransformFunctionParmPackExpr(FunctionParmPackExpr *E) {
+  // Default behavior is to do nothing with this transformation.
+  return SemaRef.Owned(E);
+}
+
+template<typename Derived>
+ExprResult
 TreeTransform<Derived>::TransformMaterializeTemporaryExpr(
                                                   MaterializeTemporaryExpr *E) {
   return getDerived().TransformExpr(E->GetTemporaryExpr());
@@ -8576,7 +8555,7 @@ ExprResult
 TreeTransform<Derived>::TransformObjCMessageExpr(ObjCMessageExpr *E) {
   // Transform arguments.
   bool ArgChanged = false;
-  ASTOwningVector<Expr*> Args(SemaRef);
+  SmallVector<Expr*, 8> Args;
   Args.reserve(E->getNumArgs());
   if (getDerived().TransformExprs(E->getArgs(), E->getNumArgs(), false, Args,
                                   &ArgChanged))
@@ -8602,7 +8581,7 @@ TreeTransform<Derived>::TransformObjCMessageExpr(ObjCMessageExpr *E) {
                                                SelLocs,
                                                E->getMethodDecl(),
                                                E->getLeftLoc(),
-                                               move_arg(Args),
+                                               Args,
                                                E->getRightLoc());
   }
 
@@ -8627,7 +8606,7 @@ TreeTransform<Derived>::TransformObjCMessageExpr(ObjCMessageExpr *E) {
                                              SelLocs,
                                              E->getMethodDecl(),
                                              E->getLeftLoc(),
-                                             move_arg(Args),
+                                             Args,
                                              E->getRightLoc());
 }
 
@@ -8740,7 +8719,7 @@ template<typename Derived>
 ExprResult
 TreeTransform<Derived>::TransformShuffleVectorExpr(ShuffleVectorExpr *E) {
   bool ArgumentChanged = false;
-  ASTOwningVector<Expr*> SubExprs(SemaRef);
+  SmallVector<Expr*, 8> SubExprs;
   SubExprs.reserve(E->getNumSubExprs());
   if (getDerived().TransformExprs(E->getSubExprs(), E->getNumSubExprs(), false,
                                   SubExprs, &ArgumentChanged))
@@ -8751,7 +8730,7 @@ TreeTransform<Derived>::TransformShuffleVectorExpr(ShuffleVectorExpr *E) {
     return SemaRef.Owned(E);
 
   return getDerived().RebuildShuffleVectorExpr(E->getBuiltinLoc(),
-                                               move_arg(SubExprs),
+                                               SubExprs,
                                                E->getRParenLoc());
 }
 
@@ -8854,7 +8833,7 @@ ExprResult
 TreeTransform<Derived>::TransformAtomicExpr(AtomicExpr *E) {
   QualType RetTy = getDerived().TransformType(E->getType());
   bool ArgumentChanged = false;
-  ASTOwningVector<Expr*> SubExprs(SemaRef);
+  SmallVector<Expr*, 8> SubExprs;
   SubExprs.reserve(E->getNumSubExprs());
   if (getDerived().TransformExprs(E->getSubExprs(), E->getNumSubExprs(), false,
                                   SubExprs, &ArgumentChanged))
@@ -8864,7 +8843,7 @@ TreeTransform<Derived>::TransformAtomicExpr(AtomicExpr *E) {
       !ArgumentChanged)
     return SemaRef.Owned(E);
 
-  return getDerived().RebuildAtomicExpr(E->getBuiltinLoc(), move_arg(SubExprs),
+  return getDerived().RebuildAtomicExpr(E->getBuiltinLoc(), SubExprs,
                                         RetTy, E->getOp(), E->getRParenLoc());
 }
 
@@ -9185,7 +9164,7 @@ TreeTransform<Derived>::RebuildCXXOperatorCallExpr(OverloadedOperatorKind Op,
       if (Result.isInvalid())
         return ExprError();
 
-      return move(Result);
+      return Result;
     }
   }
 
@@ -9200,7 +9179,12 @@ TreeTransform<Derived>::RebuildCXXOperatorCallExpr(OverloadedOperatorKind Op,
     // IsAcceptableNonMemberOperatorCandidate for each of these?
     Functions.append(ULE->decls_begin(), ULE->decls_end());
   } else {
-    Functions.addDecl(cast<DeclRefExpr>(Callee)->getDecl());
+    // If we've resolved this to a particular non-member function, just call
+    // that function. If we resolved it to a member function,
+    // CreateOverloaded* will find that function for us.
+    NamedDecl *ND = cast<DeclRefExpr>(Callee)->getDecl();
+    if (!isa<CXXMethodDecl>(ND))
+      Functions.addDecl(ND);
   }
 
   // Add any functions found via argument-dependent lookup.
@@ -9240,7 +9224,7 @@ TreeTransform<Derived>::RebuildCXXOperatorCallExpr(OverloadedOperatorKind Op,
   if (Result.isInvalid())
     return ExprError();
 
-  return move(Result);
+  return Result;
 }
 
 template<typename Derived>