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-rw-r--r--lib/CodeGen/CGBlocks.cpp197
1 files changed, 78 insertions, 119 deletions
diff --git a/lib/CodeGen/CGBlocks.cpp b/lib/CodeGen/CGBlocks.cpp
index cb9e63622185..04f1ef24b297 100644
--- a/lib/CodeGen/CGBlocks.cpp
+++ b/lib/CodeGen/CGBlocks.cpp
@@ -24,36 +24,6 @@
using namespace clang;
using namespace CodeGen;
-/// CGBlockInfo - Information to generate a block literal.
-class clang::CodeGen::CGBlockInfo {
-public:
- /// Name - The name of the block, kindof.
- const char *Name;
-
- /// DeclRefs - Variables from parent scopes that have been
- /// imported into this block.
- llvm::SmallVector<const BlockDeclRefExpr *, 8> DeclRefs;
-
- /// InnerBlocks - This block and the blocks it encloses.
- llvm::SmallPtrSet<const DeclContext *, 4> InnerBlocks;
-
- /// CXXThisRef - Non-null if 'this' was required somewhere, in
- /// which case this is that expression.
- const CXXThisExpr *CXXThisRef;
-
- /// NeedsObjCSelf - True if something in this block has an implicit
- /// reference to 'self'.
- bool NeedsObjCSelf;
-
- /// These are initialized by GenerateBlockFunction.
- bool BlockHasCopyDispose;
- CharUnits BlockSize;
- CharUnits BlockAlign;
- llvm::SmallVector<const Expr*, 8> BlockLayout;
-
- CGBlockInfo(const char *Name);
-};
-
CGBlockInfo::CGBlockInfo(const char *N)
: Name(N), CXXThisRef(0), NeedsObjCSelf(false) {
@@ -64,9 +34,12 @@ CGBlockInfo::CGBlockInfo(const char *N)
llvm::Constant *CodeGenFunction::
-BuildDescriptorBlockDecl(const BlockExpr *BE, bool BlockHasCopyDispose, CharUnits Size,
+BuildDescriptorBlockDecl(const BlockExpr *BE, const CGBlockInfo &Info,
const llvm::StructType* Ty,
+ llvm::Constant *BlockVarLayout,
std::vector<HelperInfo> *NoteForHelper) {
+ bool BlockHasCopyDispose = Info.BlockHasCopyDispose;
+ CharUnits Size = Info.BlockSize;
const llvm::Type *UnsignedLongTy
= CGM.getTypes().ConvertType(getContext().UnsignedLongTy);
llvm::Constant *C;
@@ -100,7 +73,8 @@ BuildDescriptorBlockDecl(const BlockExpr *BE, bool BlockHasCopyDispose, CharUnit
CGM.GetAddrOfConstantCString(BlockTypeEncoding), PtrToInt8Ty));
// Layout.
- C = llvm::ConstantInt::get(UnsignedLongTy, 0);
+ C = BlockVarLayout;
+
Elts.push_back(C);
C = llvm::ConstantStruct::get(VMContext, Elts, false);
@@ -111,20 +85,6 @@ BuildDescriptorBlockDecl(const BlockExpr *BE, bool BlockHasCopyDispose, CharUnit
return C;
}
-llvm::Constant *BlockModule::getNSConcreteGlobalBlock() {
- if (NSConcreteGlobalBlock == 0)
- NSConcreteGlobalBlock = CGM.CreateRuntimeVariable(PtrToInt8Ty,
- "_NSConcreteGlobalBlock");
- return NSConcreteGlobalBlock;
-}
-
-llvm::Constant *BlockModule::getNSConcreteStackBlock() {
- if (NSConcreteStackBlock == 0)
- NSConcreteStackBlock = CGM.CreateRuntimeVariable(PtrToInt8Ty,
- "_NSConcreteStackBlock");
- return NSConcreteStackBlock;
-}
-
static void CollectBlockDeclRefInfo(const Stmt *S, CGBlockInfo &Info) {
for (Stmt::const_child_iterator I = S->child_begin(), E = S->child_end();
I != E; ++I)
@@ -198,6 +158,21 @@ static void AllocateAllBlockDeclRefs(CodeGenFunction &CGF, CGBlockInfo &Info) {
}
}
+static unsigned computeBlockFlag(CodeGenModule &CGM,
+ const BlockExpr *BE, unsigned flags) {
+ QualType BPT = BE->getType();
+ const FunctionType *ftype = BPT->getPointeeType()->getAs<FunctionType>();
+ QualType ResultType = ftype->getResultType();
+
+ CallArgList Args;
+ CodeGenTypes &Types = CGM.getTypes();
+ const CGFunctionInfo &FnInfo = Types.getFunctionInfo(ResultType, Args,
+ FunctionType::ExtInfo());
+ if (CGM.ReturnTypeUsesSRet(FnInfo))
+ flags |= CodeGenFunction::BLOCK_USE_STRET;
+ return flags;
+}
+
// FIXME: Push most into CGM, passing down a few bits, like current function
// name.
llvm::Value *CodeGenFunction::BuildBlockLiteralTmp(const BlockExpr *BE) {
@@ -221,6 +196,7 @@ llvm::Value *CodeGenFunction::BuildBlockLiteralTmp(const BlockExpr *BE) {
llvm::Value *V;
{
+ llvm::Constant *BlockVarLayout;
// C = BuildBlockStructInitlist();
unsigned int flags = BLOCK_HAS_SIGNATURE;
@@ -229,6 +205,7 @@ llvm::Value *CodeGenFunction::BuildBlockLiteralTmp(const BlockExpr *BE) {
// __invoke
llvm::Function *Fn
= CodeGenFunction(CGM).GenerateBlockFunction(CurGD, BE, Info, CurFuncDecl,
+ BlockVarLayout,
LocalDeclMap);
BlockHasCopyDispose |= Info.BlockHasCopyDispose;
Elts[3] = Fn;
@@ -244,18 +221,7 @@ llvm::Value *CodeGenFunction::BuildBlockLiteralTmp(const BlockExpr *BE) {
Elts[0] = C;
// __flags
- {
- QualType BPT = BE->getType();
- const FunctionType *ftype = BPT->getPointeeType()->getAs<FunctionType>();
- QualType ResultType = ftype->getResultType();
-
- CallArgList Args;
- CodeGenTypes &Types = CGM.getTypes();
- const CGFunctionInfo &FnInfo = Types.getFunctionInfo(ResultType, Args,
- FunctionType::ExtInfo());
- if (CGM.ReturnTypeUsesSRet(FnInfo))
- flags |= BLOCK_USE_STRET;
- }
+ flags = computeBlockFlag(CGM, BE, flags);
const llvm::IntegerType *IntTy = cast<llvm::IntegerType>(
CGM.getTypes().ConvertType(CGM.getContext().IntTy));
C = llvm::ConstantInt::get(IntTy, flags);
@@ -267,8 +233,8 @@ llvm::Value *CodeGenFunction::BuildBlockLiteralTmp(const BlockExpr *BE) {
if (Info.BlockLayout.empty()) {
// __descriptor
- Elts[4] = BuildDescriptorBlockDecl(BE, Info.BlockHasCopyDispose,
- Info.BlockSize, 0, 0);
+ C = llvm::Constant::getNullValue(PtrToInt8Ty);
+ Elts[4] = BuildDescriptorBlockDecl(BE, Info, 0, C, 0);
// Optimize to being a global block.
Elts[0] = CGM.getNSConcreteGlobalBlock();
@@ -371,7 +337,7 @@ llvm::Value *CodeGenFunction::BuildBlockLiteralTmp(const BlockExpr *BE) {
SourceLocation());
if (VD->getType()->isReferenceType()) {
E = new (getContext())
- UnaryOperator(const_cast<Expr*>(E), UnaryOperator::AddrOf,
+ UnaryOperator(const_cast<Expr*>(E), UO_AddrOf,
getContext().getPointerType(E->getType()),
SourceLocation());
}
@@ -381,7 +347,7 @@ llvm::Value *CodeGenFunction::BuildBlockLiteralTmp(const BlockExpr *BE) {
if (BDRE->isByRef()) {
E = new (getContext())
- UnaryOperator(const_cast<Expr*>(E), UnaryOperator::AddrOf,
+ UnaryOperator(const_cast<Expr*>(E), UO_AddrOf,
getContext().getPointerType(E->getType()),
SourceLocation());
}
@@ -422,9 +388,8 @@ llvm::Value *CodeGenFunction::BuildBlockLiteralTmp(const BlockExpr *BE) {
NoteForHelper.resize(NumHelpers);
// __descriptor
- llvm::Value *Descriptor = BuildDescriptorBlockDecl(BE,
- Info.BlockHasCopyDispose,
- Info.BlockSize, Ty,
+ llvm::Value *Descriptor = BuildDescriptorBlockDecl(BE, Info, Ty,
+ BlockVarLayout,
&NoteForHelper);
Descriptor = Builder.CreateBitCast(Descriptor, PtrToInt8Ty);
Builder.CreateStore(Descriptor, Builder.CreateStructGEP(V, 4, "block.tmp"));
@@ -693,18 +658,23 @@ BlockModule::GetAddrOfGlobalBlock(const BlockExpr *BE, const char * n) {
std::vector<llvm::Constant*> LiteralFields(FieldCount);
CGBlockInfo Info(n);
+ llvm::Constant *BlockVarLayout;
llvm::DenseMap<const Decl*, llvm::Value*> LocalDeclMap;
llvm::Function *Fn
- = CodeGenFunction(CGM).GenerateBlockFunction(GlobalDecl(), BE, Info, 0, LocalDeclMap);
+ = CodeGenFunction(CGM).GenerateBlockFunction(GlobalDecl(), BE,
+ Info, 0, BlockVarLayout,
+ LocalDeclMap);
assert(Info.BlockSize == BlockLiteralSize
&& "no imports allowed for global block");
// isa
- LiteralFields[0] = getNSConcreteGlobalBlock();
+ LiteralFields[0] = CGM.getNSConcreteGlobalBlock();
- // Flags
+ // __flags
+ unsigned flags = computeBlockFlag(CGM, BE,
+ (BLOCK_IS_GLOBAL | BLOCK_HAS_SIGNATURE));
LiteralFields[1] =
- llvm::ConstantInt::get(IntTy, BLOCK_IS_GLOBAL | BLOCK_HAS_SIGNATURE);
+ llvm::ConstantInt::get(IntTy, flags);
// Reserved
LiteralFields[2] = llvm::Constant::getNullValue(IntTy);
@@ -737,6 +707,7 @@ llvm::Function *
CodeGenFunction::GenerateBlockFunction(GlobalDecl GD, const BlockExpr *BExpr,
CGBlockInfo &Info,
const Decl *OuterFuncDecl,
+ llvm::Constant *& BlockVarLayout,
llvm::DenseMap<const Decl*, llvm::Value*> ldm) {
// Check if we should generate debug info for this block.
@@ -751,7 +722,7 @@ CodeGenFunction::GenerateBlockFunction(GlobalDecl GD, const BlockExpr *BExpr,
++i) {
const VarDecl *VD = dyn_cast<VarDecl>(i->first);
- if (VD->getStorageClass() == VarDecl::Static || VD->hasExternalStorage())
+ if (VD->getStorageClass() == SC_Static || VD->hasExternalStorage())
LocalDeclMap[VD] = i->second;
}
@@ -784,6 +755,12 @@ CodeGenFunction::GenerateBlockFunction(GlobalDecl GD, const BlockExpr *BExpr,
// Build the block struct now.
AllocateAllBlockDeclRefs(*this, Info);
+ // Capture block layout info. here.
+ if (CGM.getContext().getLangOptions().ObjC1)
+ BlockVarLayout = CGM.getObjCRuntime().GCBlockLayout(*this, Info.DeclRefs);
+ else
+ BlockVarLayout = llvm::Constant::getNullValue(PtrToInt8Ty);
+
QualType ParmTy = getContext().getBlockParmType(BlockHasCopyDispose,
BlockLayout);
@@ -813,7 +790,11 @@ CodeGenFunction::GenerateBlockFunction(GlobalDecl GD, const BlockExpr *BExpr,
Name.getString(), &CGM.getModule());
CGM.SetInternalFunctionAttributes(BD, Fn, FI);
-
+ StartFunction(BD, ResultType, Fn, Args,
+ BExpr->getBody()->getLocEnd());
+
+ CurFuncDecl = OuterFuncDecl;
+
QualType FnType(BlockFunctionType, 0);
bool HasPrototype = isa<FunctionProtoType>(BlockFunctionType);
@@ -822,15 +803,22 @@ CodeGenFunction::GenerateBlockFunction(GlobalDecl GD, const BlockExpr *BExpr,
getContext().getTranslationUnitDecl(),
SourceLocation(), ID, FnType,
0,
- FunctionDecl::Static,
- FunctionDecl::None,
+ SC_Static,
+ SC_None,
false, HasPrototype);
+ if (FunctionProtoType *FT = dyn_cast<FunctionProtoType>(FnType)) {
+ const FunctionDecl *CFD = dyn_cast<FunctionDecl>(CurCodeDecl);
+ FunctionDecl *FD = const_cast<FunctionDecl *>(CFD);
+ llvm::SmallVector<ParmVarDecl*, 16> Params;
+ for (unsigned i = 0, e = FT->getNumArgs(); i != e; ++i)
+ Params.push_back(ParmVarDecl::Create(getContext(), FD,
+ SourceLocation(), 0,
+ FT->getArgType(i), /*TInfo=*/0,
+ SC_None, SC_None, 0));
+ FD->setParams(Params.data(), Params.size());
+ }
+
- StartFunction(BD, ResultType, Fn, Args,
- BExpr->getBody()->getLocEnd());
-
- CurFuncDecl = OuterFuncDecl;
-
// If we have a C++ 'this' reference, go ahead and force it into
// existence now.
if (Info.CXXThisRef) {
@@ -928,7 +916,7 @@ CharUnits BlockFunction::getBlockOffset(CharUnits Size, CharUnits Align) {
getContext().getTranslationUnitDecl(),
SourceLocation(),
0, QualType(PadTy), 0,
- VarDecl::None, VarDecl::None);
+ SC_None, SC_None);
Expr *E = new (getContext()) DeclRefExpr(PadDecl, PadDecl->getType(),
SourceLocation());
BlockLayout.push_back(E);
@@ -974,8 +962,8 @@ GenerateCopyHelperFunction(bool BlockHasCopyDispose, const llvm::StructType *T,
FunctionDecl *FD = FunctionDecl::Create(getContext(),
getContext().getTranslationUnitDecl(),
SourceLocation(), II, R, 0,
- FunctionDecl::Static,
- FunctionDecl::None,
+ SC_Static,
+ SC_None,
false,
true);
CGF.StartFunction(FD, R, Fn, Args, SourceLocation());
@@ -1012,7 +1000,7 @@ GenerateCopyHelperFunction(bool BlockHasCopyDispose, const llvm::StructType *T,
Dstv = Builder.CreateBitCast(Dstv, PtrToInt8Ty);
llvm::Value *N = llvm::ConstantInt::get(CGF.Int32Ty, flag);
- llvm::Value *F = getBlockObjectAssign();
+ llvm::Value *F = CGM.getBlockObjectAssign();
Builder.CreateCall3(F, Dstv, Srcv, N);
}
}
@@ -1056,8 +1044,8 @@ GenerateDestroyHelperFunction(bool BlockHasCopyDispose,
FunctionDecl *FD = FunctionDecl::Create(getContext(),
getContext().getTranslationUnitDecl(),
SourceLocation(), II, R, 0,
- FunctionDecl::Static,
- FunctionDecl::None,
+ SC_Static,
+ SC_None,
false, true);
CGF.StartFunction(FD, R, Fn, Args, SourceLocation());
@@ -1141,8 +1129,8 @@ GeneratebyrefCopyHelperFunction(const llvm::Type *T, int flag) {
FunctionDecl *FD = FunctionDecl::Create(getContext(),
getContext().getTranslationUnitDecl(),
SourceLocation(), II, R, 0,
- FunctionDecl::Static,
- FunctionDecl::None,
+ SC_Static,
+ SC_None,
false, true);
CGF.StartFunction(FD, R, Fn, Args, SourceLocation());
@@ -1164,7 +1152,7 @@ GeneratebyrefCopyHelperFunction(const llvm::Type *T, int flag) {
flag |= BLOCK_BYREF_CALLER;
llvm::Value *N = llvm::ConstantInt::get(CGF.Int32Ty, flag);
- llvm::Value *F = getBlockObjectAssign();
+ llvm::Value *F = CGM.getBlockObjectAssign();
Builder.CreateCall3(F, DstObj, SrcObj, N);
CGF.FinishFunction();
@@ -1205,8 +1193,8 @@ BlockFunction::GeneratebyrefDestroyHelperFunction(const llvm::Type *T,
FunctionDecl *FD = FunctionDecl::Create(getContext(),
getContext().getTranslationUnitDecl(),
SourceLocation(), II, R, 0,
- FunctionDecl::Static,
- FunctionDecl::None,
+ SC_Static,
+ SC_None,
false, true);
CGF.StartFunction(FD, R, Fn, Args, SourceLocation());
@@ -1259,37 +1247,8 @@ llvm::Constant *BlockFunction::BuildbyrefDestroyHelper(const llvm::Type *T,
return Entry=CodeGenFunction(CGM).GeneratebyrefDestroyHelperFunction(T, Flag);
}
-llvm::Value *BlockFunction::getBlockObjectDispose() {
- if (CGM.BlockObjectDispose == 0) {
- const llvm::FunctionType *FTy;
- std::vector<const llvm::Type*> ArgTys;
- const llvm::Type *ResultType = llvm::Type::getVoidTy(VMContext);
- ArgTys.push_back(PtrToInt8Ty);
- ArgTys.push_back(CGF.Int32Ty);
- FTy = llvm::FunctionType::get(ResultType, ArgTys, false);
- CGM.BlockObjectDispose
- = CGM.CreateRuntimeFunction(FTy, "_Block_object_dispose");
- }
- return CGM.BlockObjectDispose;
-}
-
-llvm::Value *BlockFunction::getBlockObjectAssign() {
- if (CGM.BlockObjectAssign == 0) {
- const llvm::FunctionType *FTy;
- std::vector<const llvm::Type*> ArgTys;
- const llvm::Type *ResultType = llvm::Type::getVoidTy(VMContext);
- ArgTys.push_back(PtrToInt8Ty);
- ArgTys.push_back(PtrToInt8Ty);
- ArgTys.push_back(CGF.Int32Ty);
- FTy = llvm::FunctionType::get(ResultType, ArgTys, false);
- CGM.BlockObjectAssign
- = CGM.CreateRuntimeFunction(FTy, "_Block_object_assign");
- }
- return CGM.BlockObjectAssign;
-}
-
void BlockFunction::BuildBlockRelease(llvm::Value *V, int flag) {
- llvm::Value *F = getBlockObjectDispose();
+ llvm::Value *F = CGM.getBlockObjectDispose();
llvm::Value *N;
V = Builder.CreateBitCast(V, PtrToInt8Ty);
N = llvm::ConstantInt::get(CGF.Int32Ty, flag);
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-05 00:42:47 +0000