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Sink dwarf unit length emission down into DwarfUnit::emitHeader

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This allows the CU label to be emitted only for compile units, as
they're the only ones that need it (so they can be referenced from
pubnames)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@221072 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
David Blaikie 2014-11-01 23:59:23 +00:00
parent d457d52613
commit 5e8ee21fb6
4 changed files with 14 additions and 7 deletions
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8
lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp
View File

@ -686,4 +686,12 @@ void DwarfCompileUnit::collectDeadVariables(DISubprogram SP) {
}
}
void DwarfCompileUnit::emitHeader(const MCSymbol *ASectionSym) const {
// Emit the compile units header.
Asm->OutStreamer.EmitLabel(LabelBegin);
DwarfUnit::emitHeader(ASectionSym);
}
} // end llvm namespace

2
lib/CodeGen/AsmPrinter/DwarfCompileUnit.h
View File

@ -177,6 +177,8 @@ public:
return sizeof(uint32_t) + // Length field
getHeaderSize() + UnitDie.getSize();
}
void emitHeader(const MCSymbol *ASectionSym) const override;
};
} // end llvm namespace

7
lib/CodeGen/AsmPrinter/DwarfFile.cpp
View File

@ -55,13 +55,6 @@ void DwarfFile::emitUnits(const MCSymbol *ASectionSym) {
const MCSection *USection = TheU->getSection();
Asm->OutStreamer.SwitchSection(USection);
// Emit the compile units header.
Asm->OutStreamer.EmitLabel(TheU->getLabelBegin());
// Emit size of content not including length itself
Asm->OutStreamer.AddComment("Length of Unit");
Asm->EmitInt32(TheU->getHeaderSize() + Die.getSize());
TheU->emitHeader(ASectionSym);
DD.emitDIE(Die);

4
lib/CodeGen/AsmPrinter/DwarfUnit.cpp
View File

@ -1730,6 +1730,10 @@ DIE *DwarfUnit::getOrCreateStaticMemberDIE(DIDerivedType DT) {
}
void DwarfUnit::emitHeader(const MCSymbol *ASectionSym) const {
// Emit size of content not including length itself
Asm->OutStreamer.AddComment("Length of Unit");
Asm->EmitInt32(getHeaderSize() + UnitDie.getSize());
Asm->OutStreamer.AddComment("DWARF version number");
Asm->EmitInt16(DD->getDwarfVersion());
Asm->OutStreamer.AddComment("Offset Into Abbrev. Section");