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simplified small section logic

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llvm-svn: 53912
This commit is contained in:
Bruno Cardoso Lopes 2008-07-22 16:24:21 +00:00
parent f13fbd6879
commit a4a3546fec
1 changed files with 18 additions and 34 deletions
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52
lib/Target/Mips/MipsTargetAsmInfo.cpp
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@ -45,45 +45,29 @@ MipsTargetAsmInfo::MipsTargetAsmInfo(const MipsTargetMachine &TM):
SectionFlags::Writeable | SectionFlags::BSS); SectionFlags::Writeable | SectionFlags::BSS);
} }
static bool isSuitableForBSS(const GlobalVariable *GV) {
if (!GV->hasInitializer())
return true;
// Leave constant zeros in readonly constant sections, so they can be shared
Constant *C = GV->getInitializer();
return (C->isNullValue() && !GV->isConstant() && !NoZerosInBSS);
}
SectionKind::Kind SectionKind::Kind
MipsTargetAsmInfo::SectionKindForGlobal(const GlobalValue *GV) const { MipsTargetAsmInfo::SectionKindForGlobal(const GlobalValue *GV) const {
const TargetData *TD = ETM->getTargetData(); SectionKind::Kind K = ELFTargetAsmInfo::SectionKindForGlobal(GV);
const GlobalVariable *GVA = dyn_cast<GlobalVariable>(GV);
if (!GVA) if (K != SectionKind::Data && K != SectionKind::BSS &&
return ELFTargetAsmInfo::SectionKindForGlobal(GV); K != SectionKind::RODataMergeConst)
return K;
// if this is a internal constant string, there is a special
// section for it, but not in small data/bss. if (isa<GlobalVariable>(GV)) {
if (GVA->hasInitializer() && GV->hasInternalLinkage()) { const TargetData *TD = ETM->getTargetData();
Constant *C = GVA->getInitializer(); unsigned Size = TD->getABITypeSize(GV->getType()->getElementType());
const ConstantArray *CVA = dyn_cast<ConstantArray>(C); unsigned Threshold =
if (CVA && CVA->isCString()) MipsTM->getSubtarget<MipsSubtarget>().getSSectionThreshold();
return ELFTargetAsmInfo::SectionKindForGlobal(GV);
if (Size > 0 && Size <= Threshold) {
if (K == SectionKind::BSS)
return SectionKind::SmallBSS;
else
return SectionKind::SmallData;
}
} }
const Type *Ty = GV->getType()->getElementType(); return K;
unsigned Size = TD->getABITypeSize(Ty);
unsigned Threshold =
MipsTM->getSubtarget<MipsSubtarget>().getSSectionThreshold();
if (Size > 0 && Size <= Threshold) {
if (isSuitableForBSS(GVA))
return SectionKind::SmallBSS;
else
return SectionKind::SmallData;
}
return ELFTargetAsmInfo::SectionKindForGlobal(GV);
} }
const Section* const Section*