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Rearrange all the SectionKinds and structure them into a hierarchical

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group instead of a bunch of random unrelated ideas.  Provide predicates
to categorize a SectionKind into a group, and use them instead of 
getKind() throughout the code.

This also renames a ton of SectionKinds to be more consistent and
evocative, and adds a huge number of comments on the enums so that
I will hopefully be able to remember how this stuff works long from
now.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@77129 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
2009-07-26 05:44:20 +00:00
parent d6b06b1f36
commit e346e180f3
5 changed files with 180 additions and 110 deletions
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65
lib/Target/ELFTargetAsmInfo.cpp
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@@ -49,28 +49,30 @@ ELFTargetAsmInfo::ELFTargetAsmInfo(const TargetMachine &TM)
const Section*
ELFTargetAsmInfo::SelectSectionForGlobal(const GlobalValue *GV,
SectionKind Kind) const {
switch (Kind.getKind()) {
default: llvm_unreachable("Unknown section kind");
case SectionKind::Text: return TextSection;
case SectionKind::BSS: return getBSSSection_();
case SectionKind::Data: return DataSection;
case SectionKind::DataRel: return DataRelSection;
case SectionKind::DataRelLocal: return DataRelLocalSection;
case SectionKind::DataRelRO: return DataRelROSection;
case SectionKind::DataRelROLocal: return DataRelROLocalSection;
case SectionKind::ROData: return getReadOnlySection();
case SectionKind::RODataMergeStr:
if (Kind.isText()) return TextSection;
if (Kind.isMergableCString())
return MergeableStringSection(cast<GlobalVariable>(GV));
case SectionKind::RODataMergeConst: {
if (Kind.isMergableConst()) {
const Type *Ty = cast<GlobalVariable>(GV)->getInitializer()->getType();
const TargetData *TD = TM.getTargetData();
return getSectionForMergableConstant(TD->getTypeAllocSize(Ty), 0);
}
case SectionKind::ThreadData:
return TLSDataSection;
case SectionKind::ThreadBSS:
return TLSBSSSection;
}
if (Kind.isReadOnly()) return getReadOnlySection();
if (Kind.isThreadData()) return TLSDataSection;
if (Kind.isThreadBSS()) return TLSBSSSection;
if (Kind.isBSS()) return getBSSSection_();
if (Kind.isDataNoRel()) return DataSection;
if (Kind.isDataRelLocal()) return DataRelLocalSection;
if (Kind.isDataRel()) return DataRelSection;
if (Kind.isReadOnlyWithRelLocal()) return DataRelROLocalSection;
assert(Kind.isReadOnlyWithRel() && "Unknown section kind");
return DataRelROSection;
}
/// getSectionForMergableConstant - Given a mergable constant with the
@@ -129,21 +131,20 @@ unsigned ELFTargetAsmInfo::getFlagsForNamedSection(const char *Name) const {
const char *
ELFTargetAsmInfo::getSectionPrefixForUniqueGlobal(SectionKind Kind) const{
switch (Kind.getKind()) {
default: llvm_unreachable("Unknown section kind");
case SectionKind::Text: return ".gnu.linkonce.t.";
case SectionKind::Data: return ".gnu.linkonce.d.";
case SectionKind::DataRel: return ".gnu.linkonce.d.rel.";
case SectionKind::DataRelLocal: return ".gnu.linkonce.d.rel.local.";
case SectionKind::DataRelRO: return ".gnu.linkonce.d.rel.ro.";
case SectionKind::DataRelROLocal: return ".gnu.linkonce.d.rel.ro.local.";
case SectionKind::BSS: return ".gnu.linkonce.b.";
case SectionKind::ROData:
case SectionKind::RODataMergeConst:
case SectionKind::RODataMergeStr: return ".gnu.linkonce.r.";
case SectionKind::ThreadData: return ".gnu.linkonce.td.";
case SectionKind::ThreadBSS: return ".gnu.linkonce.tb.";
}
if (Kind.isText()) return ".gnu.linkonce.t.";
if (Kind.isReadOnly()) return ".gnu.linkonce.r.";
if (Kind.isThreadData()) return ".gnu.linkonce.td.";
if (Kind.isThreadBSS()) return ".gnu.linkonce.tb.";
if (Kind.isBSS()) return ".gnu.linkonce.b.";
if (Kind.isDataNoRel()) return ".gnu.linkonce.d.";
if (Kind.isDataRelLocal()) return ".gnu.linkonce.d.rel.local.";
if (Kind.isDataRel()) return ".gnu.linkonce.d.rel.";
if (Kind.isReadOnlyWithRelLocal()) return ".gnu.linkonce.d.rel.ro.local.";
assert(Kind.isReadOnlyWithRel() && "Unknown section kind");
return ".gnu.linkonce.d.rel.ro.";
}