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author | David Blaikie <dblaikie@gmail.com> | 2014-01-09 05:08:28 +0000 |
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committer | David Blaikie <dblaikie@gmail.com> | 2014-01-09 05:08:28 +0000 |
commit | 5f0929577b652b74fc0caab08b5beb5563c32e50 (patch) | |
tree | 08ecc1c0212301015a5b28145d1c970947b64130 /lib/CodeGen | |
parent | a34ec4a961503e1ceb6c6c3ce0b59911960b8fa1 (diff) | |
download | llvm-5f0929577b652b74fc0caab08b5beb5563c32e50.tar.gz llvm-5f0929577b652b74fc0caab08b5beb5563c32e50.tar.bz2 llvm-5f0929577b652b74fc0caab08b5beb5563c32e50.tar.xz |
Prototype of skeleton type units for fission
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@198851 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen')
-rw-r--r-- | lib/CodeGen/AsmPrinter/DwarfDebug.cpp | 22 | ||||
-rw-r--r-- | lib/CodeGen/AsmPrinter/DwarfDebug.h | 4 | ||||
-rw-r--r-- | lib/CodeGen/AsmPrinter/DwarfUnit.cpp | 4 |
3 files changed, 26 insertions, 4 deletions
diff --git a/lib/CodeGen/AsmPrinter/DwarfDebug.cpp b/lib/CodeGen/AsmPrinter/DwarfDebug.cpp index 247cd04eac..690ae37674 100644 --- a/lib/CodeGen/AsmPrinter/DwarfDebug.cpp +++ b/lib/CodeGen/AsmPrinter/DwarfDebug.cpp @@ -2976,6 +2976,21 @@ DwarfCompileUnit *DwarfDebug::constructSkeletonCU(const DwarfCompileUnit *CU) { return NewCU; } +// This DIE has the following attributes: DW_AT_comp_dir, DW_AT_dwo_name, +// DW_AT_addr_base. +DwarfTypeUnit *DwarfDebug::constructSkeletonTU(const DwarfTypeUnit *TU) { + + DIE *Die = new DIE(dwarf::DW_TAG_type_unit); + DwarfTypeUnit *NewTU = new DwarfTypeUnit( + TU->getUniqueID(), Die, TU->getCUNode(), Asm, this, &SkeletonHolder); + NewTU->setTypeSignature(TU->getTypeSignature()); + NewTU->initSection( + Asm->getObjFileLowering().getDwarfTypesSection(TU->getTypeSignature())); + + initSkeletonUnit(TU, Die, NewTU); + return NewTU; +} + // Emit the .debug_info.dwo section for separated dwarf. This contains the // compile units that would normally be in debug_info. void DwarfDebug::emitDebugInfoDWO() { @@ -3018,8 +3033,6 @@ void DwarfDebug::addDwarfTypeUnitType(DICompileUnit CUNode, NewTU->addUInt(UnitDie, dwarf::DW_AT_language, dwarf::DW_FORM_data2, CUNode.getLanguage()); - DIE *Die = NewTU->createTypeDIE(CTy); - MD5 Hash; Hash.update(Identifier); // ... take the least significant 8 bytes and return those. Our MD5 @@ -3029,7 +3042,10 @@ void DwarfDebug::addDwarfTypeUnitType(DICompileUnit CUNode, Hash.final(Result); uint64_t Signature = *reinterpret_cast<support::ulittle64_t *>(Result + 8); NewTU->setTypeSignature(Signature); - NewTU->setType(Die); + if (useSplitDwarf()) + NewTU->setSkeleton(constructSkeletonTU(NewTU)); + + NewTU->setType(NewTU->createTypeDIE(CTy)); NewTU->initSection( useSplitDwarf() diff --git a/lib/CodeGen/AsmPrinter/DwarfDebug.h b/lib/CodeGen/AsmPrinter/DwarfDebug.h index 0c00c1be36..5a21106055 100644 --- a/lib/CodeGen/AsmPrinter/DwarfDebug.h +++ b/lib/CodeGen/AsmPrinter/DwarfDebug.h @@ -596,6 +596,10 @@ class DwarfDebug : public AsmPrinterHandler { /// section. DwarfCompileUnit *constructSkeletonCU(const DwarfCompileUnit *CU); + /// \brief Construct the split debug info compile unit for the debug info + /// section. + DwarfTypeUnit *constructSkeletonTU(const DwarfTypeUnit *TU); + /// \brief Emit the debug info dwo section. void emitDebugInfoDWO(); diff --git a/lib/CodeGen/AsmPrinter/DwarfUnit.cpp b/lib/CodeGen/AsmPrinter/DwarfUnit.cpp index b066c95fe9..7cf66954e4 100644 --- a/lib/CodeGen/AsmPrinter/DwarfUnit.cpp +++ b/lib/CodeGen/AsmPrinter/DwarfUnit.cpp @@ -1987,7 +1987,9 @@ void DwarfTypeUnit::emitHeader(const MCSection *ASection, Asm->OutStreamer.AddComment("Type Signature"); Asm->OutStreamer.EmitIntValue(TypeSignature, sizeof(TypeSignature)); Asm->OutStreamer.AddComment("Type DIE Offset"); - Asm->OutStreamer.EmitIntValue(Ty->getOffset(), sizeof(Ty->getOffset())); + // In a skeleton type unit there is no type DIE so emit a zero offset. + Asm->OutStreamer.EmitIntValue(Ty ? Ty->getOffset() : 0, + sizeof(Ty->getOffset())); } void DwarfTypeUnit::initSection(const MCSection *Section) { |