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Only produce the eh_frame section if we have at least one personality function.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130692 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Rafael Espindola
2011-05-02 15:49:52 +00:00
parent b2d7336fde
commit e17e6c01c8
1 changed files with 9 additions and 7 deletions
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16
lib/CodeGen/AsmPrinter/DwarfCFIException.cpp
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@ -54,25 +54,27 @@ void DwarfCFIException::EndModule() {
const TargetLoweringObjectFile &TLOF = Asm->getObjFileLowering(); const TargetLoweringObjectFile &TLOF = Asm->getObjFileLowering();
if (!TLOF.isFunctionEHFrameSymbolPrivate()) {
// This is a temporary hack to keep sections in the same order they
// were before. This lets us produce bit identical outputs while
// transitioning to CFI.
Asm->OutStreamer.SwitchSection(TLOF.getEHFrameSection());
}
unsigned PerEncoding = TLOF.getPersonalityEncoding(); unsigned PerEncoding = TLOF.getPersonalityEncoding();
if ((PerEncoding & 0x70) != dwarf::DW_EH_PE_pcrel) if ((PerEncoding & 0x70) != dwarf::DW_EH_PE_pcrel)
return; return;
// Emit references to all used personality functions // Emit references to all used personality functions
bool AtLeastOne = false;
const std::vector<const Function*> &Personalities = MMI->getPersonalities(); const std::vector<const Function*> &Personalities = MMI->getPersonalities();
for (size_t i = 0, e = Personalities.size(); i != e; ++i) { for (size_t i = 0, e = Personalities.size(); i != e; ++i) {
if (!Personalities[i]) if (!Personalities[i])
continue; continue;
MCSymbol *Sym = Asm->Mang->getSymbol(Personalities[i]); MCSymbol *Sym = Asm->Mang->getSymbol(Personalities[i]);
TLOF.emitPersonalityValue(Asm->OutStreamer, Asm->TM, Sym); TLOF.emitPersonalityValue(Asm->OutStreamer, Asm->TM, Sym);
AtLeastOne = true;
}
if (AtLeastOne && !TLOF.isFunctionEHFrameSymbolPrivate()) {
// This is a temporary hack to keep sections in the same order they
// were before. This lets us produce bit identical outputs while
// transitioning to CFI.
Asm->OutStreamer.SwitchSection(TLOF.getEHFrameSection());
} }
} }