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simplified small section logic 

llvm-svn: 53912
This commit is contained in:
Bruno Cardoso Lopes 2008-07-22 16:24:21 +00:00
parent 2d29ee06cd
commit 19b7f815a0
1 changed files with 18 additions and 34 deletions
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52
llvm/lib/Target/Mips/MipsTargetAsmInfo.cpp
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@ -45,45 +45,29 @@ MipsTargetAsmInfo::MipsTargetAsmInfo(const MipsTargetMachine &TM):
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
MipsTargetAsmInfo::SectionKindForGlobal(const GlobalValue *GV) const {
const TargetData *TD = ETM->getTargetData();
const GlobalVariable *GVA = dyn_cast<GlobalVariable>(GV);
SectionKind::Kind K = ELFTargetAsmInfo::SectionKindForGlobal(GV);
if (!GVA)
return ELFTargetAsmInfo::SectionKindForGlobal(GV);
// if this is a internal constant string, there is a special
// section for it, but not in small data/bss.
if (GVA->hasInitializer() && GV->hasInternalLinkage()) {
Constant *C = GVA->getInitializer();
const ConstantArray *CVA = dyn_cast<ConstantArray>(C);
if (CVA && CVA->isCString())
return ELFTargetAsmInfo::SectionKindForGlobal(GV);
if (K != SectionKind::Data && K != SectionKind::BSS &&
K != SectionKind::RODataMergeConst)
return K;
if (isa<GlobalVariable>(GV)) {
const TargetData *TD = ETM->getTargetData();
unsigned Size = TD->getABITypeSize(GV->getType()->getElementType());
unsigned Threshold =
MipsTM->getSubtarget<MipsSubtarget>().getSSectionThreshold();
if (Size > 0 && Size <= Threshold) {
if (K == SectionKind::BSS)
return SectionKind::SmallBSS;
else
return SectionKind::SmallData;
}
}
const Type *Ty = GV->getType()->getElementType();
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);
return K;
}
const Section*