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Provide section selection for X86 ELF targets
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53305 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -261,6 +261,9 @@ TargetAsmInfo::SectionForGlobal(const GlobalValue *GV) const {
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std::string Name;
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std::string Name;
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// FIXME: Should we use some hashing based on section name and just check
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// flags?
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// Select section name
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// Select section name
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if (GV->hasSection()) {
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if (GV->hasSection()) {
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// Honour section already set, if any
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// Honour section already set, if any
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@ -313,6 +313,51 @@ X86ELFTargetAsmInfo::PreferredEHDataFormat(DwarfEncoding::Target Reason,
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}
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}
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}
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}
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std::string
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X86ELFTargetAsmInfo::SelectSectionForGlobal(const GlobalValue *GV) const {
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SectionKind::Kind kind = SectionKindForGlobal(GV);
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if (const Function *F = dyn_cast<Function>(GV)) {
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switch (F->getLinkage()) {
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default: assert(0 && "Unknown linkage type!");
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case Function::InternalLinkage:
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case Function::DLLExportLinkage:
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case Function::ExternalLinkage:
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return getTextSection();
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case Function::WeakLinkage:
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case Function::LinkOnceLinkage:
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return UniqueSectionForGlobal(F, kind);
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}
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} else if (const GlobalVariable *GVar = dyn_cast<GlobalVariable>(GV)) {
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if (GVar->hasCommonLinkage() ||
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GVar->hasLinkOnceLinkage() ||
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GVar->hasWeakLinkage())
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return UniqueSectionForGlobal(GVar, kind);
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else {
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switch (kind) {
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case SectionKind::Data:
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return getDataSection();
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case SectionKind::BSS:
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// ELF targets usually have BSS sections
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return getBSSSection();
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case SectionKind::ROData:
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case SectionKind::RODataMergeStr:
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case SectionKind::RODataMergeConst:
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// FIXME: Temporary
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return getReadOnlySection();
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case SectionKind::ThreadData:
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// ELF targets usually support TLS stuff
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return getTLSDataSection();
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case SectionKind::ThreadBSS:
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return getTLSBSSSection();
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default:
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assert(0 && "Unsuported section kind for global");
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}
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}
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} else
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assert(0 && "Unsupported global");
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}
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std::string X86ELFTargetAsmInfo::PrintSectionFlags(unsigned flags) const {
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std::string X86ELFTargetAsmInfo::PrintSectionFlags(unsigned flags) const {
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std::string Flags = ",\"";
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std::string Flags = ",\"";
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@ -472,67 +517,3 @@ X86WinTargetAsmInfo::X86WinTargetAsmInfo(const X86TargetMachine &TM):
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DataSectionStartSuffix = "\tsegment 'DATA'";
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DataSectionStartSuffix = "\tsegment 'DATA'";
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SectionEndDirectiveSuffix = "\tends\n";
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SectionEndDirectiveSuffix = "\tends\n";
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}
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}
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std::string X86TargetAsmInfo::SectionForGlobal(const GlobalValue *GV) const {
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SectionKind::Kind kind = SectionKindForGlobal(GV);
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unsigned flags = SectionFlagsForGlobal(GV, GV->getSection().c_str());
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std::string Name;
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// FIXME: Should we use some hashing based on section name and just check
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// flags?
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// FIXME: It seems, that Darwin uses much more sections.
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// Select section name
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if (GV->hasSection()) {
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// Honour section already set, if any
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Name = GV->getSection();
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} else {
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// Use default section depending on the 'type' of global
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if (const Function *F = dyn_cast<Function>(GV)) {
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switch (F->getLinkage()) {
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default: assert(0 && "Unknown linkage type!");
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case Function::InternalLinkage:
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case Function::DLLExportLinkage:
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case Function::ExternalLinkage:
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Name = getTextSection();
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break;
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case Function::WeakLinkage:
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case Function::LinkOnceLinkage:
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Name = UniqueSectionForGlobal(F, kind);
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break;
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}
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} else if (const GlobalVariable *GVar = dyn_cast<GlobalVariable>(GV)) {
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if (GVar->hasCommonLinkage() ||
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GVar->hasLinkOnceLinkage() ||
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GVar->hasWeakLinkage())
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Name = UniqueSectionForGlobal(GVar, kind);
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else {
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switch (kind) {
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case SectionKind::Data:
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Name = getDataSection();
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break;
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case SectionKind::BSS:
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Name = (getBSSSection() ? getBSSSection() : getDataSection());
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break;
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case SectionKind::ROData:
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case SectionKind::RODataMergeStr:
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case SectionKind::RODataMergeConst:
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// FIXME: Temporary
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Name = getDataSection();
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break;
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case SectionKind::ThreadData:
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Name = (getTLSDataSection() ? getTLSDataSection() : getDataSection());
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break;
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case SectionKind::ThreadBSS:
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Name = (getTLSBSSSection() ? getTLSBSSSection() : getDataSection());
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default:
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assert(0 && "Unsuported section kind for global");
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}
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}
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} else
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assert(0 && "Unsupported global");
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}
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Name += PrintSectionFlags(flags);
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return Name;
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}
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@ -45,6 +45,8 @@ namespace llvm {
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explicit X86ELFTargetAsmInfo(const X86TargetMachine &TM);
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explicit X86ELFTargetAsmInfo(const X86TargetMachine &TM);
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virtual unsigned PreferredEHDataFormat(DwarfEncoding::Target Reason,
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virtual unsigned PreferredEHDataFormat(DwarfEncoding::Target Reason,
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bool Global) const;
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bool Global) const;
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virtual std::string SelectSectionForGlobal(const GlobalValue *GV) const;
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virtual std::string PrintSectionFlags(unsigned flags) const;
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virtual std::string PrintSectionFlags(unsigned flags) const;
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};
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};
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