Vendor import of llvm RELEASE_350/final tag r216957 (effectively, 3.5.0 release):vendor/llvm/llvm-release_350-r216957

https://llvm.org/svn/llvm-project/llvm/tags/RELEASE_350/final@216957

1 files changed, 152 insertions, 34 deletions

diff --git a/lib/CodeGen/AsmPrinter/DIE.cpp b/lib/CodeGen/AsmPrinter/DIE.cpp
index 69444285f4ec..c3dcd9c8c19d 100644
--- a/lib/CodeGen/AsmPrinter/DIE.cpp
+++ b/lib/CodeGen/AsmPrinter/DIE.cpp
@@ -13,17 +13,18 @@
 
 #include "DIE.h"
 #include "DwarfDebug.h"
+#include "DwarfUnit.h"
 #include "llvm/ADT/Twine.h"
 #include "llvm/CodeGen/AsmPrinter.h"
 #include "llvm/IR/DataLayout.h"
 #include "llvm/MC/MCAsmInfo.h"
 #include "llvm/MC/MCStreamer.h"
 #include "llvm/MC/MCSymbol.h"
-#include "llvm/Support/Allocator.h"
 #include "llvm/Support/Debug.h"
 #include "llvm/Support/ErrorHandling.h"
 #include "llvm/Support/Format.h"
 #include "llvm/Support/FormattedStream.h"
+#include "llvm/Support/LEB128.h"
 #include "llvm/Support/MD5.h"
 using namespace llvm;
 
@@ -48,7 +49,7 @@ void DIEAbbrevData::Profile(FoldingSetNodeID &ID) const {
 ///
 void DIEAbbrev::Profile(FoldingSetNodeID &ID) const {
   ID.AddInteger(unsigned(Tag));
-  ID.AddInteger(ChildrenFlag);
+  ID.AddInteger(unsigned(Children));
 
   // For each attribute description.
   for (unsigned i = 0, N = Data.size(); i < N; ++i)
@@ -62,7 +63,7 @@ void DIEAbbrev::Emit(AsmPrinter *AP) const {
   AP->EmitULEB128(Tag, dwarf::TagString(Tag));
 
   // Emit whether it has children DIEs.
-  AP->EmitULEB128(ChildrenFlag, dwarf::ChildrenString(ChildrenFlag));
+  AP->EmitULEB128((unsigned)Children, dwarf::ChildrenString(Children));
 
   // For each attribute description.
   for (unsigned i = 0, N = Data.size(); i < N; ++i) {
@@ -89,7 +90,7 @@ void DIEAbbrev::print(raw_ostream &O) {
     << "  "
     << dwarf::TagString(Tag)
     << " "
-    << dwarf::ChildrenString(ChildrenFlag)
+    << dwarf::ChildrenString(Children)
     << '\n';
 
   for (unsigned i = 0, N = Data.size(); i < N; ++i) {
@@ -103,36 +104,28 @@ void DIEAbbrev::print(raw_ostream &O) {
 void DIEAbbrev::dump() { print(dbgs()); }
 #endif
 
-//===----------------------------------------------------------------------===//
-// DIE Implementation
-//===----------------------------------------------------------------------===//
-
-DIE::~DIE() {
-  for (unsigned i = 0, N = Children.size(); i < N; ++i)
-    delete Children[i];
-}
-
-/// Climb up the parent chain to get the compile unit DIE to which this DIE
+/// Climb up the parent chain to get the unit DIE to which this DIE
 /// belongs.
-const DIE *DIE::getCompileUnit() const {
-  const DIE *Cu = getCompileUnitOrNull();
+const DIE *DIE::getUnit() const {
+  const DIE *Cu = getUnitOrNull();
   assert(Cu && "We should not have orphaned DIEs.");
   return Cu;
 }
 
-/// Climb up the parent chain to get the compile unit DIE this DIE belongs
+/// Climb up the parent chain to get the unit DIE this DIE belongs
 /// to. Return NULL if DIE is not added to an owner yet.
-const DIE *DIE::getCompileUnitOrNull() const {
+const DIE *DIE::getUnitOrNull() const {
   const DIE *p = this;
   while (p) {
-    if (p->getTag() == dwarf::DW_TAG_compile_unit)
+    if (p->getTag() == dwarf::DW_TAG_compile_unit ||
+        p->getTag() == dwarf::DW_TAG_type_unit)
       return p;
     p = p->getParent();
   }
-  return NULL;
+  return nullptr;
 }
 
-DIEValue *DIE::findAttribute(uint16_t Attribute) {
+DIEValue *DIE::findAttribute(dwarf::Attribute Attribute) const {
   const SmallVectorImpl<DIEValue *> &Values = getValues();
   const DIEAbbrev &Abbrevs = getAbbrev();
 
@@ -141,7 +134,7 @@ DIEValue *DIE::findAttribute(uint16_t Attribute) {
   for (size_t i = 0; i < Values.size(); ++i)
     if (Abbrevs.getData()[i].getAttribute() == Attribute)
       return Values[i];
-  return NULL;
+  return nullptr;
 }
 
 #ifndef NDEBUG
@@ -159,7 +152,7 @@ void DIE::print(raw_ostream &O, unsigned IndentCount) const {
     O << Indent
       << dwarf::TagString(Abbrev.getTag())
       << " "
-      << dwarf::ChildrenString(Abbrev.getChildrenFlag()) << "\n";
+      << dwarf::ChildrenString(Abbrev.hasChildren()) << "\n";
   } else {
     O << "Size: " << Size << "\n";
   }
@@ -215,8 +208,7 @@ void DIEInteger::EmitValue(AsmPrinter *Asm, dwarf::Form Form) const {
   case dwarf::DW_FORM_flag_present:
     // Emit something to keep the lines and comments in sync.
     // FIXME: Is there a better way to do this?
-    if (Asm->OutStreamer.hasRawTextSupport())
-      Asm->OutStreamer.EmitRawText("");
+    Asm->OutStreamer.AddBlankLine();
     return;
   case dwarf::DW_FORM_flag:  // Fall thru
   case dwarf::DW_FORM_ref1:  // Fall thru
@@ -227,6 +219,7 @@ void DIEInteger::EmitValue(AsmPrinter *Asm, dwarf::Form Form) const {
   case dwarf::DW_FORM_ref4:  // Fall thru
   case dwarf::DW_FORM_data4: Size = 4; break;
   case dwarf::DW_FORM_ref8:  // Fall thru
+  case dwarf::DW_FORM_ref_sig8:  // Fall thru
   case dwarf::DW_FORM_data8: Size = 8; break;
   case dwarf::DW_FORM_GNU_str_index: Asm->EmitULEB128(Integer); return;
   case dwarf::DW_FORM_GNU_addr_index: Asm->EmitULEB128(Integer); return;
@@ -253,11 +246,12 @@ unsigned DIEInteger::SizeOf(AsmPrinter *AP, dwarf::Form Form) const {
   case dwarf::DW_FORM_ref4:  // Fall thru
   case dwarf::DW_FORM_data4: return sizeof(int32_t);
   case dwarf::DW_FORM_ref8:  // Fall thru
+  case dwarf::DW_FORM_ref_sig8:  // Fall thru
   case dwarf::DW_FORM_data8: return sizeof(int64_t);
-  case dwarf::DW_FORM_GNU_str_index: return MCAsmInfo::getULEB128Size(Integer);
-  case dwarf::DW_FORM_GNU_addr_index: return MCAsmInfo::getULEB128Size(Integer);
-  case dwarf::DW_FORM_udata: return MCAsmInfo::getULEB128Size(Integer);
-  case dwarf::DW_FORM_sdata: return MCAsmInfo::getSLEB128Size(Integer);
+  case dwarf::DW_FORM_GNU_str_index: return getULEB128Size(Integer);
+  case dwarf::DW_FORM_GNU_addr_index: return getULEB128Size(Integer);
+  case dwarf::DW_FORM_udata: return getULEB128Size(Integer);
+  case dwarf::DW_FORM_sdata: return getSLEB128Size(Integer);
   case dwarf::DW_FORM_addr:  return AP->getDataLayout().getPointerSize();
   default: llvm_unreachable("DIE Value form not supported yet");
   }
@@ -338,6 +332,7 @@ void DIEDelta::EmitValue(AsmPrinter *AP, dwarf::Form Form) const {
 ///
 unsigned DIEDelta::SizeOf(AsmPrinter *AP, dwarf::Form Form) const {
   if (Form == dwarf::DW_FORM_data4) return 4;
+  if (Form == dwarf::DW_FORM_sec_offset) return 4;
   if (Form == dwarf::DW_FORM_strp) return 4;
   return AP->getDataLayout().getPointerSize();
 }
@@ -378,7 +373,26 @@ void DIEString::print(raw_ostream &O) const {
 /// EmitValue - Emit debug information entry offset.
 ///
 void DIEEntry::EmitValue(AsmPrinter *AP, dwarf::Form Form) const {
-  AP->EmitInt32(Entry->getOffset());
+
+  if (Form == dwarf::DW_FORM_ref_addr) {
+    const DwarfDebug *DD = AP->getDwarfDebug();
+    unsigned Addr = Entry.getOffset();
+    assert(!DD->useSplitDwarf() && "TODO: dwo files can't have relocations.");
+    // For DW_FORM_ref_addr, output the offset from beginning of debug info
+    // section. Entry->getOffset() returns the offset from start of the
+    // compile unit.
+    DwarfCompileUnit *CU = DD->lookupUnit(Entry.getUnit());
+    assert(CU && "CUDie should belong to a CU.");
+    Addr += CU->getDebugInfoOffset();
+    if (AP->MAI->doesDwarfUseRelocationsAcrossSections())
+      AP->EmitLabelPlusOffset(CU->getSectionSym(), Addr,
+                              DIEEntry::getRefAddrSize(AP));
+    else
+      AP->EmitLabelOffsetDifference(CU->getSectionSym(), Addr,
+                                    CU->getSectionSym(),
+                                    DIEEntry::getRefAddrSize(AP));
+  } else
+    AP->EmitInt32(Entry.getOffset());
 }
 
 unsigned DIEEntry::getRefAddrSize(AsmPrinter *AP) {
@@ -386,14 +400,87 @@ unsigned DIEEntry::getRefAddrSize(AsmPrinter *AP) {
   // specified to be four bytes in the DWARF 32-bit format and eight bytes
   // in the DWARF 64-bit format, while DWARF Version 2 specifies that such
   // references have the same size as an address on the target system.
-  if (AP->getDwarfDebug()->getDwarfVersion() == 2)
+  const DwarfDebug *DD = AP->getDwarfDebug();
+  assert(DD && "Expected Dwarf Debug info to be available");
+  if (DD->getDwarfVersion() == 2)
     return AP->getDataLayout().getPointerSize();
   return sizeof(int32_t);
 }
 
 #ifndef NDEBUG
 void DIEEntry::print(raw_ostream &O) const {
-  O << format("Die: 0x%lx", (long)(intptr_t)Entry);
+  O << format("Die: 0x%lx", (long)(intptr_t)&Entry);
+}
+#endif
+
+//===----------------------------------------------------------------------===//
+// DIETypeSignature Implementation
+//===----------------------------------------------------------------------===//
+void DIETypeSignature::EmitValue(AsmPrinter *Asm, dwarf::Form Form) const {
+  assert(Form == dwarf::DW_FORM_ref_sig8);
+  Asm->OutStreamer.EmitIntValue(Unit.getTypeSignature(), 8);
+}
+
+#ifndef NDEBUG
+void DIETypeSignature::print(raw_ostream &O) const {
+  O << format("Type Unit: 0x%lx", Unit.getTypeSignature());
+}
+
+void DIETypeSignature::dump() const { print(dbgs()); }
+#endif
+
+//===----------------------------------------------------------------------===//
+// DIELoc Implementation
+//===----------------------------------------------------------------------===//
+
+/// ComputeSize - calculate the size of the location expression.
+///
+unsigned DIELoc::ComputeSize(AsmPrinter *AP) const {
+  if (!Size) {
+    const SmallVectorImpl<DIEAbbrevData> &AbbrevData = Abbrev.getData();
+    for (unsigned i = 0, N = Values.size(); i < N; ++i)
+      Size += Values[i]->SizeOf(AP, AbbrevData[i].getForm());
+  }
+
+  return Size;
+}
+
+/// EmitValue - Emit location data.
+///
+void DIELoc::EmitValue(AsmPrinter *Asm, dwarf::Form Form) const {
+  switch (Form) {
+  default: llvm_unreachable("Improper form for block");
+  case dwarf::DW_FORM_block1: Asm->EmitInt8(Size);    break;
+  case dwarf::DW_FORM_block2: Asm->EmitInt16(Size);   break;
+  case dwarf::DW_FORM_block4: Asm->EmitInt32(Size);   break;
+  case dwarf::DW_FORM_block:
+  case dwarf::DW_FORM_exprloc:
+    Asm->EmitULEB128(Size); break;
+  }
+
+  const SmallVectorImpl<DIEAbbrevData> &AbbrevData = Abbrev.getData();
+  for (unsigned i = 0, N = Values.size(); i < N; ++i)
+    Values[i]->EmitValue(Asm, AbbrevData[i].getForm());
+}
+
+/// SizeOf - Determine size of location data in bytes.
+///
+unsigned DIELoc::SizeOf(AsmPrinter *AP, dwarf::Form Form) const {
+  switch (Form) {
+  case dwarf::DW_FORM_block1: return Size + sizeof(int8_t);
+  case dwarf::DW_FORM_block2: return Size + sizeof(int16_t);
+  case dwarf::DW_FORM_block4: return Size + sizeof(int32_t);
+  case dwarf::DW_FORM_block:
+  case dwarf::DW_FORM_exprloc:
+    return Size + getULEB128Size(Size);
+  default: llvm_unreachable("Improper form for block");
+  }
+}
+
+#ifndef NDEBUG
+void DIELoc::print(raw_ostream &O) const {
+  O << "ExprLoc: ";
+  DIE::print(O, 5);
 }
 #endif
 
@@ -403,7 +490,7 @@ void DIEEntry::print(raw_ostream &O) const {
 
 /// ComputeSize - calculate the size of the block.
 ///
-unsigned DIEBlock::ComputeSize(AsmPrinter *AP) {
+unsigned DIEBlock::ComputeSize(AsmPrinter *AP) const {
   if (!Size) {
     const SmallVectorImpl<DIEAbbrevData> &AbbrevData = Abbrev.getData();
     for (unsigned i = 0, N = Values.size(); i < N; ++i)
@@ -436,7 +523,7 @@ unsigned DIEBlock::SizeOf(AsmPrinter *AP, dwarf::Form Form) const {
   case dwarf::DW_FORM_block1: return Size + sizeof(int8_t);
   case dwarf::DW_FORM_block2: return Size + sizeof(int16_t);
   case dwarf::DW_FORM_block4: return Size + sizeof(int32_t);
-  case dwarf::DW_FORM_block:  return Size + MCAsmInfo::getULEB128Size(Size);
+  case dwarf::DW_FORM_block:  return Size + getULEB128Size(Size);
   default: llvm_unreachable("Improper form for block");
   }
 }
@@ -447,3 +534,34 @@ void DIEBlock::print(raw_ostream &O) const {
   DIE::print(O, 5);
 }
 #endif
+
+//===----------------------------------------------------------------------===//
+// DIELocList Implementation
+//===----------------------------------------------------------------------===//
+
+unsigned DIELocList::SizeOf(AsmPrinter *AP, dwarf::Form Form) const {
+  if (Form == dwarf::DW_FORM_data4)
+    return 4;
+  if (Form == dwarf::DW_FORM_sec_offset)
+    return 4;
+  return AP->getDataLayout().getPointerSize();
+}
+
+/// EmitValue - Emit label value.
+///
+void DIELocList::EmitValue(AsmPrinter *AP, dwarf::Form Form) const {
+  DwarfDebug *DD = AP->getDwarfDebug();
+  MCSymbol *Label = DD->getDebugLocEntries()[Index].Label;
+
+  if (AP->MAI->doesDwarfUseRelocationsAcrossSections() && !DD->useSplitDwarf())
+    AP->EmitSectionOffset(Label, DD->getDebugLocSym());
+  else
+    AP->EmitLabelDifference(Label, DD->getDebugLocSym(), 4);
+}
+
+#ifndef NDEBUG
+void DIELocList::print(raw_ostream &O) const {
+  O << "LocList: " << Index;
+
+}
+#endif