diff options
Diffstat (limited to 'contrib/llvm-project/llvm/lib/CodeGen/TargetLoweringObjectFileImpl.cpp')
| -rw-r--r-- | contrib/llvm-project/llvm/lib/CodeGen/TargetLoweringObjectFileImpl.cpp | 91 |
1 files changed, 63 insertions, 28 deletions
diff --git a/contrib/llvm-project/llvm/lib/CodeGen/TargetLoweringObjectFileImpl.cpp b/contrib/llvm-project/llvm/lib/CodeGen/TargetLoweringObjectFileImpl.cpp index ce350034d073..f3d68bd9c92d 100644 --- a/contrib/llvm-project/llvm/lib/CodeGen/TargetLoweringObjectFileImpl.cpp +++ b/contrib/llvm-project/llvm/lib/CodeGen/TargetLoweringObjectFileImpl.cpp @@ -310,7 +310,7 @@ void TargetLoweringObjectFileELF::emitModuleMetadata(MCStreamer &Streamer, auto *S = C.getELFSection(".linker-options", ELF::SHT_LLVM_LINKER_OPTIONS, ELF::SHF_EXCLUDE); - Streamer.SwitchSection(S); + Streamer.switchSection(S); for (const auto *Operand : LinkerOptions->operands()) { if (cast<MDNode>(Operand)->getNumOperands() != 2) @@ -326,7 +326,7 @@ void TargetLoweringObjectFileELF::emitModuleMetadata(MCStreamer &Streamer, auto *S = C.getELFSection(".deplibs", ELF::SHT_LLVM_DEPENDENT_LIBRARIES, ELF::SHF_MERGE | ELF::SHF_STRINGS, 1); - Streamer.SwitchSection(S); + Streamer.switchSection(S); for (const auto *Operand : DependentLibraries->operands()) { Streamer.emitBytes( @@ -350,7 +350,7 @@ void TargetLoweringObjectFileELF::emitModuleMetadata(MCStreamer &Streamer, auto *S = C.getObjectFileInfo()->getPseudoProbeDescSection( TM->getFunctionSections() ? Name->getString() : StringRef()); - Streamer.SwitchSection(S); + Streamer.switchSection(S); Streamer.emitInt64(GUID->getZExtValue()); Streamer.emitInt64(Hash->getZExtValue()); Streamer.emitULEB128IntValue(Name->getString().size()); @@ -365,11 +365,11 @@ void TargetLoweringObjectFileELF::emitModuleMetadata(MCStreamer &Streamer, GetObjCImageInfo(M, Version, Flags, Section); if (!Section.empty()) { auto *S = C.getELFSection(Section, ELF::SHT_PROGBITS, ELF::SHF_ALLOC); - Streamer.SwitchSection(S); + Streamer.switchSection(S); Streamer.emitLabel(C.getOrCreateSymbol(StringRef("OBJC_IMAGE_INFO"))); Streamer.emitInt32(Version); Streamer.emitInt32(Flags); - Streamer.AddBlankLine(); + Streamer.addBlankLine(); } emitCGProfileMetadata(Streamer, M); @@ -399,7 +399,7 @@ void TargetLoweringObjectFileELF::emitPersonalityValue( MCSection *Sec = getContext().getELFNamedSection(".data", Label->getName(), ELF::SHT_PROGBITS, Flags, 0); unsigned Size = DL.getPointerSize(); - Streamer.SwitchSection(Sec); + Streamer.switchSection(Sec); Streamer.emitValueToAlignment(DL.getPointerABIAlignment(0).value()); Streamer.emitSymbolAttribute(Label, MCSA_ELF_TypeObject); const MCExpr *E = MCConstantExpr::create(Size, getContext()); @@ -449,6 +449,9 @@ static SectionKind getELFKindForNamedSection(StringRef Name, SectionKind K) { Name == ".llvmbc" || Name == ".llvmcmd") return SectionKind::getMetadata(); + if (Name == ".llvm.offloading") + return SectionKind::getExclude(); + if (Name.empty() || Name[0] != '.') return K; // Default implementation based on some magic section names. @@ -507,9 +510,12 @@ static unsigned getELFSectionType(StringRef Name, SectionKind K) { static unsigned getELFSectionFlags(SectionKind K) { unsigned Flags = 0; - if (!K.isMetadata()) + if (!K.isMetadata() && !K.isExclude()) Flags |= ELF::SHF_ALLOC; + if (K.isExclude()) + Flags |= ELF::SHF_EXCLUDE; + if (K.isText()) Flags |= ELF::SHF_EXECINSTR; @@ -681,9 +687,10 @@ calcUniqueIDUpdateFlagsAndSize(const GlobalObject *GO, StringRef SectionName, } if (Retain) { - if ((Ctx.getAsmInfo()->useIntegratedAssembler() || - Ctx.getAsmInfo()->binutilsIsAtLeast(2, 36)) && - !TM.getTargetTriple().isOSSolaris()) + if (TM.getTargetTriple().isOSSolaris()) + Flags |= ELF::SHF_SUNW_NODISCARD; + else if (Ctx.getAsmInfo()->useIntegratedAssembler() || + Ctx.getAsmInfo()->binutilsIsAtLeast(2, 36)) Flags |= ELF::SHF_GNU_RETAIN; return NextUniqueID++; } @@ -860,12 +867,15 @@ static MCSection *selectELFSectionForGlobal( EmitUniqueSection = true; Flags |= ELF::SHF_LINK_ORDER; } - if (Retain && - (Ctx.getAsmInfo()->useIntegratedAssembler() || - Ctx.getAsmInfo()->binutilsIsAtLeast(2, 36)) && - !TM.getTargetTriple().isOSSolaris()) { - EmitUniqueSection = true; - Flags |= ELF::SHF_GNU_RETAIN; + if (Retain) { + if (TM.getTargetTriple().isOSSolaris()) { + EmitUniqueSection = true; + Flags |= ELF::SHF_SUNW_NODISCARD; + } else if (Ctx.getAsmInfo()->useIntegratedAssembler() || + Ctx.getAsmInfo()->binutilsIsAtLeast(2, 36)) { + EmitUniqueSection = true; + Flags |= ELF::SHF_GNU_RETAIN; + } } MCSectionELF *Section = selectELFSectionForGlobal( @@ -1171,6 +1181,15 @@ void TargetLoweringObjectFileMachO::Initialize(MCContext &Ctx, dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4; } +MCSection *TargetLoweringObjectFileMachO::getStaticDtorSection( + unsigned Priority, const MCSymbol *KeySym) const { + // TODO(yln): Remove -lower-global-dtors-via-cxa-atexit fallback flag + // (LowerGlobalDtorsViaCxaAtExit) and always issue a fatal error here. + if (TM->Options.LowerGlobalDtorsViaCxaAtExit) + report_fatal_error("@llvm.global_dtors should have been lowered already"); + return StaticDtorSection; +} + void TargetLoweringObjectFileMachO::emitModuleMetadata(MCStreamer &Streamer, Module &M) const { // Emit the linker options if present. @@ -1207,12 +1226,12 @@ void TargetLoweringObjectFileMachO::emitModuleMetadata(MCStreamer &Streamer, // Get the section. MCSectionMachO *S = getContext().getMachOSection( Segment, Section, TAA, StubSize, SectionKind::getData()); - Streamer.SwitchSection(S); + Streamer.switchSection(S); Streamer.emitLabel(getContext(). getOrCreateSymbol(StringRef("L_OBJC_IMAGE_INFO"))); Streamer.emitInt32(VersionVal); Streamer.emitInt32(ImageInfoFlags); - Streamer.AddBlankLine(); + Streamer.addBlankLine(); } static void checkMachOComdat(const GlobalValue *GV) { @@ -1520,6 +1539,9 @@ getCOFFSectionFlags(SectionKind K, const TargetMachine &TM) { if (K.isMetadata()) Flags |= COFF::IMAGE_SCN_MEM_DISCARDABLE; + else if (K.isExclude()) + Flags |= + COFF::IMAGE_SCN_LNK_REMOVE | COFF::IMAGE_SCN_MEM_DISCARDABLE; else if (K.isText()) Flags |= COFF::IMAGE_SCN_MEM_EXECUTE | @@ -1755,11 +1777,11 @@ void TargetLoweringObjectFileCOFF::emitModuleMetadata(MCStreamer &Streamer, COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | COFF::IMAGE_SCN_MEM_READ, SectionKind::getReadOnly()); - Streamer.SwitchSection(S); + Streamer.switchSection(S); Streamer.emitLabel(C.getOrCreateSymbol(StringRef("OBJC_IMAGE_INFO"))); Streamer.emitInt32(Version); Streamer.emitInt32(Flags); - Streamer.AddBlankLine(); + Streamer.addBlankLine(); } emitCGProfileMetadata(Streamer, M); @@ -1772,7 +1794,7 @@ void TargetLoweringObjectFileCOFF::emitLinkerDirectives( // spec, this section is a space-separated string containing flags for // linker. MCSection *Sec = getDrectveSection(); - Streamer.SwitchSection(Sec); + Streamer.switchSection(Sec); for (const auto *Option : LinkerOptions->operands()) { for (const auto &Piece : cast<MDNode>(Option)->operands()) { // Lead with a space for consistency with our dllexport implementation. @@ -1791,7 +1813,7 @@ void TargetLoweringObjectFileCOFF::emitLinkerDirectives( getMangler()); OS.flush(); if (!Flags.empty()) { - Streamer.SwitchSection(getDrectveSection()); + Streamer.switchSection(getDrectveSection()); Streamer.emitBytes(Flags); } Flags.clear(); @@ -1817,7 +1839,7 @@ void TargetLoweringObjectFileCOFF::emitLinkerDirectives( OS.flush(); if (!Flags.empty()) { - Streamer.SwitchSection(getDrectveSection()); + Streamer.switchSection(getDrectveSection()); Streamer.emitBytes(Flags); } Flags.clear(); @@ -2170,8 +2192,7 @@ MCSection *TargetLoweringObjectFileWasm::getStaticCtorSection( MCSection *TargetLoweringObjectFileWasm::getStaticDtorSection( unsigned Priority, const MCSymbol *KeySym) const { - llvm_unreachable("@llvm.global_dtors should have been lowered already"); - return nullptr; + report_fatal_error("@llvm.global_dtors should have been lowered already"); } //===----------------------------------------------------------------------===// @@ -2544,10 +2565,24 @@ MCSection *TargetLoweringObjectFileXCOFF::getSectionForTOCEntry( XCOFF::XTY_SD)); } +MCSection *TargetLoweringObjectFileXCOFF::getSectionForLSDA( + const Function &F, const MCSymbol &FnSym, const TargetMachine &TM) const { + auto *LSDA = cast<MCSectionXCOFF>(LSDASection); + if (TM.getFunctionSections()) { + // If option -ffunction-sections is on, append the function name to the + // name of the LSDA csect so that each function has its own LSDA csect. + // This helps the linker to garbage-collect EH info of unused functions. + SmallString<128> NameStr = LSDA->getName(); + raw_svector_ostream(NameStr) << '.' << F.getName(); + LSDA = getContext().getXCOFFSection(NameStr, LSDA->getKind(), + LSDA->getCsectProp()); + } + return LSDA; +} //===----------------------------------------------------------------------===// // GOFF //===----------------------------------------------------------------------===// -TargetLoweringObjectFileGOFF::TargetLoweringObjectFileGOFF() {} +TargetLoweringObjectFileGOFF::TargetLoweringObjectFileGOFF() = default; MCSection *TargetLoweringObjectFileGOFF::getExplicitSectionGlobal( const GlobalObject *GO, SectionKind Kind, const TargetMachine &TM) const { @@ -2558,8 +2593,8 @@ MCSection *TargetLoweringObjectFileGOFF::SelectSectionForGlobal( const GlobalObject *GO, SectionKind Kind, const TargetMachine &TM) const { auto *Symbol = TM.getSymbol(GO); if (Kind.isBSS()) - return getContext().getGOFFSection(Symbol->getName(), - SectionKind::getBSS()); + return getContext().getGOFFSection(Symbol->getName(), SectionKind::getBSS(), + nullptr, nullptr); return getContext().getObjectFileInfo()->getTextSection(); } |