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Map directly from signature symbol to group index. NFC.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@236058 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Rafael Espindola 2015-04-28 22:59:58 +00:00
parent f506831ede
commit 5acccb16a8
1 changed files with 13 additions and 10 deletions
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23
lib/MC/ELFObjectWriter.cpp
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@ -217,8 +217,8 @@ class ELFObjectWriter : public MCObjectWriter {
uint64_t getSymbolIndexInSymbolTable(const MCAssembler &Asm,
const MCSymbol *S);
// Map from a signature symbol to the group section
typedef DenseMap<const MCSymbol*, const MCSectionELF*> RevGroupMapTy;
// Map from a signature symbol to the group section index
typedef DenseMap<const MCSymbol *, unsigned> RevGroupMapTy;
// Start and end offset of each section
typedef std::vector<std::pair<uint64_t, uint64_t>> SectionOffsetsTy;
@ -231,7 +231,9 @@ class ELFObjectWriter : public MCObjectWriter {
const SectionIndexMapTy &SectionIndexMap,
const RevGroupMapTy &RevGroupMap);
void maybeAddToGroup(MCAssembler &Asm, const RevGroupMapTy &RevGroupMap,
void maybeAddToGroup(MCAssembler &Asm,
ArrayRef<const MCSectionELF *> Sections,
const RevGroupMapTy &RevGroupMap,
const MCSectionELF &Section, unsigned Index);
void computeIndexMap(MCAssembler &Asm,
@ -940,13 +942,14 @@ bool ELFObjectWriter::isLocal(const MCSymbolData &Data, bool isUsedInReloc) {
}
void ELFObjectWriter::maybeAddToGroup(MCAssembler &Asm,
ArrayRef<const MCSectionELF *> Sections,
const RevGroupMapTy &RevGroupMap,
const MCSectionELF &Section,
unsigned Index) {
const MCSymbol *Sym = Section.getGroup();
if (!Sym)
return;
const MCSectionELF *Group = RevGroupMap.lookup(Sym);
const MCSectionELF *Group = Sections[RevGroupMap.lookup(Sym) - 1];
MCSectionData &Data = Asm.getOrCreateSectionData(*Group);
// FIXME: we could use the previous fragment
MCDataFragment *F = new MCDataFragment(&Data);
@ -964,7 +967,7 @@ void ELFObjectWriter::computeIndexMap(
Sections.push_back(&Section);
unsigned Index = Sections.size();
SectionIndexMap[&Section] = Index;
maybeAddToGroup(Asm, RevGroupMap, Section, Index);
maybeAddToGroup(Asm, Sections, RevGroupMap, Section, Index);
createRelocationSection(Asm, SD);
}
}
@ -1017,7 +1020,7 @@ void ELFObjectWriter::computeSymbolTable(
MSD.SectionIndex = ELF::SHN_COMMON;
} else if (BaseSymbol->isUndefined()) {
if (isSignature && !Used)
MSD.SectionIndex = SectionIndexMap.lookup(RevGroupMap.lookup(&Symbol));
MSD.SectionIndex = RevGroupMap.lookup(&Symbol);
else
MSD.SectionIndex = ELF::SHN_UNDEF;
if (!Used && WeakrefUsed)
@ -1435,11 +1438,11 @@ void ELFObjectWriter::createIndexedSections(
const MCSymbol *SignatureSymbol = Section.getGroup();
Asm.getOrCreateSymbolData(*SignatureSymbol);
const MCSectionELF *&Group = RevGroupMap[SignatureSymbol];
if (!Group) {
Group = Ctx.createELFGroupSection(SignatureSymbol);
unsigned &GroupIdx = RevGroupMap[SignatureSymbol];
if (!GroupIdx) {
const MCSectionELF *Group = Ctx.createELFGroupSection(SignatureSymbol);
Sections.push_back(Group);
SectionIndexMap[Group] = Sections.size();
GroupIdx = Sections.size();
MCSectionData &Data = Asm.getOrCreateSectionData(*Group);
Data.setAlignment(4);