X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FMC%2FMCStreamer.cpp;h=7fbbbd95b560f32cb8e101fd7db0417f826dd004;hb=1a2abd4a907811c736e349173ecc5a06d9c73fc1;hp=23e816c24bf808692336cf5c9555c707cbf295fb;hpb=b63d71ef813d48a5d07b92c9d911635b3163facf;p=oota-llvm.git diff --git a/lib/MC/MCStreamer.cpp b/lib/MC/MCStreamer.cpp index 23e816c24bf..7fbbbd95b56 100644 --- a/lib/MC/MCStreamer.cpp +++ b/lib/MC/MCStreamer.cpp @@ -14,8 +14,11 @@ #include "llvm/MC/MCAsmInfo.h" #include "llvm/MC/MCContext.h" #include "llvm/MC/MCExpr.h" +#include "llvm/MC/MCInst.h" +#include "llvm/MC/MCInstPrinter.h" #include "llvm/MC/MCObjectFileInfo.h" #include "llvm/MC/MCObjectWriter.h" +#include "llvm/MC/MCSection.h" #include "llvm/MC/MCSymbol.h" #include "llvm/MC/MCWin64EH.h" #include "llvm/Support/ErrorHandling.h" @@ -115,7 +118,7 @@ void MCStreamer::EmitSymbolValue(const MCSymbol *Sym, unsigned Size, "SectionRelative value requires 4-bytes"); if (!IsSectionRelative) - EmitValueImpl(MCSymbolRefExpr::Create(Sym, getContext()), Size); + EmitValueImpl(MCSymbolRefExpr::create(Sym, getContext()), Size); else EmitCOFFSecRel32(Sym); } @@ -131,7 +134,7 @@ void MCStreamer::EmitGPRel32Value(const MCExpr *Value) { /// EmitFill - Emit NumBytes bytes worth of the value specified by /// FillValue. This implements directives such as '.space'. void MCStreamer::EmitFill(uint64_t NumBytes, uint8_t FillValue) { - const MCExpr *E = MCConstantExpr::Create(FillValue, getContext()); + const MCExpr *E = MCConstantExpr::create(FillValue, getContext()); for (uint64_t i = 0, e = NumBytes; i != e; ++i) EmitValue(E, 1); } @@ -144,7 +147,7 @@ void MCStreamer::EmitZeros(uint64_t NumBytes) { unsigned MCStreamer::EmitDwarfFileDirective(unsigned FileNo, StringRef Directory, StringRef Filename, unsigned CUID) { - return getContext().GetDwarfFile(Directory, Filename, FileNo, CUID); + return getContext().getDwarfFile(Directory, Filename, FileNo, CUID); } void MCStreamer::EmitDwarfLocDirective(unsigned FileNo, unsigned Line, @@ -161,7 +164,7 @@ MCSymbol *MCStreamer::getDwarfLineTableSymbol(unsigned CUID) { if (!Table.getLabel()) { StringRef Prefix = Context.getAsmInfo()->getPrivateGlobalPrefix(); Table.setLabel( - Context.GetOrCreateSymbol(Prefix + "line_table_start" + Twine(CUID))); + Context.getOrCreateSymbol(Prefix + "line_table_start" + Twine(CUID))); } return Table.getLabel(); } @@ -186,7 +189,7 @@ void MCStreamer::InitSections(bool NoExecStack) { SwitchSection(getContext().getObjectFileInfo()->getTextSection()); } -void MCStreamer::AssignSection(MCSymbol *Symbol, const MCSection *Section) { +void MCStreamer::AssignSection(MCSymbol *Symbol, MCSection *Section) { if (Section) Symbol->setSection(*Section); else @@ -211,14 +214,14 @@ void MCStreamer::EmitCFISections(bool EH, bool Debug) { assert(EH || Debug); } -void MCStreamer::EmitCFIStartProc(bool IsSimple, MCSymbol *FuncSym) { +void MCStreamer::EmitCFIStartProc(bool IsSimple) { MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo(); if (CurFrame && !CurFrame->End) report_fatal_error("Starting a frame before finishing the previous one!"); MCDwarfFrameInfo Frame; Frame.IsSimple = IsSimple; - EmitCFIStartProcImpl(Frame, FuncSym); + EmitCFIStartProcImpl(Frame); const MCAsmInfo* MAI = Context.getAsmInfo(); if (MAI) { @@ -233,8 +236,8 @@ void MCStreamer::EmitCFIStartProc(bool IsSimple, MCSymbol *FuncSym) { DwarfFrameInfos.push_back(Frame); } -void MCStreamer::EmitCFIStartProcImpl(MCDwarfFrameInfo &Frame, - MCSymbol *FuncSym) {} +void MCStreamer::EmitCFIStartProcImpl(MCDwarfFrameInfo &Frame) { +} void MCStreamer::EmitCFIEndProc() { EnsureValidDwarfFrame(); @@ -250,7 +253,7 @@ void MCStreamer::EmitCFIEndProcImpl(MCDwarfFrameInfo &Frame) { MCSymbol *MCStreamer::EmitCFICommon() { EnsureValidDwarfFrame(); - MCSymbol *Label = getContext().CreateTempSymbol(); + MCSymbol *Label = getContext().createTempSymbol(); EmitLabel(Label); return Label; } @@ -389,15 +392,21 @@ void MCStreamer::EmitCFIWindowSave() { } void MCStreamer::EnsureValidWinFrameInfo() { + const MCAsmInfo *MAI = Context.getAsmInfo(); + if (!MAI->usesWindowsCFI()) + report_fatal_error(".seh_* directives are not supported on this target"); if (!CurrentWinFrameInfo || CurrentWinFrameInfo->End) report_fatal_error("No open Win64 EH frame function!"); } void MCStreamer::EmitWinCFIStartProc(const MCSymbol *Symbol) { + const MCAsmInfo *MAI = Context.getAsmInfo(); + if (!MAI->usesWindowsCFI()) + report_fatal_error(".seh_* directives are not supported on this target"); if (CurrentWinFrameInfo && !CurrentWinFrameInfo->End) report_fatal_error("Starting a function before ending the previous one!"); - MCSymbol *StartProc = getContext().CreateTempSymbol(); + MCSymbol *StartProc = getContext().createTempSymbol(); EmitLabel(StartProc); WinFrameInfos.push_back(new WinEH::FrameInfo(Symbol, StartProc)); @@ -409,7 +418,7 @@ void MCStreamer::EmitWinCFIEndProc() { if (CurrentWinFrameInfo->ChainedParent) report_fatal_error("Not all chained regions terminated!"); - MCSymbol *Label = getContext().CreateTempSymbol(); + MCSymbol *Label = getContext().createTempSymbol(); EmitLabel(Label); CurrentWinFrameInfo->End = Label; } @@ -417,7 +426,7 @@ void MCStreamer::EmitWinCFIEndProc() { void MCStreamer::EmitWinCFIStartChained() { EnsureValidWinFrameInfo(); - MCSymbol *StartProc = getContext().CreateTempSymbol(); + MCSymbol *StartProc = getContext().createTempSymbol(); EmitLabel(StartProc); WinFrameInfos.push_back(new WinEH::FrameInfo(CurrentWinFrameInfo->Function, @@ -430,7 +439,7 @@ void MCStreamer::EmitWinCFIEndChained() { if (!CurrentWinFrameInfo->ChainedParent) report_fatal_error("End of a chained region outside a chained region!"); - MCSymbol *Label = getContext().CreateTempSymbol(); + MCSymbol *Label = getContext().createTempSymbol(); EmitLabel(Label); CurrentWinFrameInfo->End = Label; @@ -461,7 +470,7 @@ void MCStreamer::EmitWinEHHandlerData() { void MCStreamer::EmitWinCFIPushReg(unsigned Register) { EnsureValidWinFrameInfo(); - MCSymbol *Label = getContext().CreateTempSymbol(); + MCSymbol *Label = getContext().createTempSymbol(); EmitLabel(Label); WinEH::Instruction Inst = Win64EH::Instruction::PushNonVol(Label, Register); @@ -477,7 +486,7 @@ void MCStreamer::EmitWinCFISetFrame(unsigned Register, unsigned Offset) { if (Offset > 240) report_fatal_error("Frame offset must be less than or equal to 240!"); - MCSymbol *Label = getContext().CreateTempSymbol(); + MCSymbol *Label = getContext().createTempSymbol(); EmitLabel(Label); WinEH::Instruction Inst = @@ -493,7 +502,7 @@ void MCStreamer::EmitWinCFIAllocStack(unsigned Size) { if (Size & 7) report_fatal_error("Misaligned stack allocation!"); - MCSymbol *Label = getContext().CreateTempSymbol(); + MCSymbol *Label = getContext().createTempSymbol(); EmitLabel(Label); WinEH::Instruction Inst = Win64EH::Instruction::Alloc(Label, Size); @@ -505,7 +514,7 @@ void MCStreamer::EmitWinCFISaveReg(unsigned Register, unsigned Offset) { if (Offset & 7) report_fatal_error("Misaligned saved register offset!"); - MCSymbol *Label = getContext().CreateTempSymbol(); + MCSymbol *Label = getContext().createTempSymbol(); EmitLabel(Label); WinEH::Instruction Inst = @@ -518,7 +527,7 @@ void MCStreamer::EmitWinCFISaveXMM(unsigned Register, unsigned Offset) { if (Offset & 0x0F) report_fatal_error("Misaligned saved vector register offset!"); - MCSymbol *Label = getContext().CreateTempSymbol(); + MCSymbol *Label = getContext().createTempSymbol(); EmitLabel(Label); WinEH::Instruction Inst = @@ -531,7 +540,7 @@ void MCStreamer::EmitWinCFIPushFrame(bool Code) { if (CurrentWinFrameInfo->Instructions.size() > 0) report_fatal_error("If present, PushMachFrame must be the first UOP"); - MCSymbol *Label = getContext().CreateTempSymbol(); + MCSymbol *Label = getContext().createTempSymbol(); EmitLabel(Label); WinEH::Instruction Inst = Win64EH::Instruction::PushMachFrame(Label, Code); @@ -541,12 +550,15 @@ void MCStreamer::EmitWinCFIPushFrame(bool Code) { void MCStreamer::EmitWinCFIEndProlog() { EnsureValidWinFrameInfo(); - MCSymbol *Label = getContext().CreateTempSymbol(); + MCSymbol *Label = getContext().createTempSymbol(); EmitLabel(Label); CurrentWinFrameInfo->PrologEnd = Label; } +void MCStreamer::EmitCOFFSafeSEH(MCSymbol const *Symbol) { +} + void MCStreamer::EmitCOFFSectionIndex(MCSymbol const *Symbol) { } @@ -590,6 +602,11 @@ void MCStreamer::EmitAssignment(MCSymbol *Symbol, const MCExpr *Value) { TS->emitAssignment(Symbol, Value); } +void MCTargetStreamer::prettyPrintAsm(MCInstPrinter &InstPrinter, raw_ostream &OS, + const MCInst &Inst, const MCSubtargetInfo &STI) { + InstPrinter.printInst(&Inst, OS, "", STI); +} + void MCStreamer::visitUsedSymbol(const MCSymbol &Sym) { } @@ -627,6 +644,25 @@ void MCStreamer::EmitInstruction(const MCInst &Inst, visitUsedExpr(*Inst.getOperand(i).getExpr()); } +void MCStreamer::emitAbsoluteSymbolDiff(const MCSymbol *Hi, const MCSymbol *Lo, + unsigned Size) { + // Get the Hi-Lo expression. + const MCExpr *Diff = + MCBinaryExpr::createSub(MCSymbolRefExpr::create(Hi, Context), + MCSymbolRefExpr::create(Lo, Context), Context); + + const MCAsmInfo *MAI = Context.getAsmInfo(); + if (!MAI->doesSetDirectiveSuppressesReloc()) { + EmitValue(Diff, Size); + return; + } + + // Otherwise, emit with .set (aka assignment). + MCSymbol *SetLabel = Context.createTempSymbol("set", true); + EmitAssignment(SetLabel, Diff); + EmitSymbolValue(SetLabel, Size); +} + void MCStreamer::EmitAssemblerFlag(MCAssemblerFlag Flag) {} void MCStreamer::EmitThumbFunc(MCSymbol *Func) {} void MCStreamer::EmitSymbolDesc(MCSymbol *Symbol, unsigned DescValue) {} @@ -635,12 +671,12 @@ void MCStreamer::EndCOFFSymbolDef() {} void MCStreamer::EmitFileDirective(StringRef Filename) {} void MCStreamer::EmitCOFFSymbolStorageClass(int StorageClass) {} void MCStreamer::EmitCOFFSymbolType(int Type) {} -void MCStreamer::EmitELFSize(MCSymbol *Symbol, const MCExpr *Value) {} +void MCStreamer::emitELFSize(MCSymbolELF *Symbol, const MCExpr *Value) {} void MCStreamer::EmitLocalCommonSymbol(MCSymbol *Symbol, uint64_t Size, unsigned ByteAlignment) {} -void MCStreamer::EmitTBSSSymbol(const MCSection *Section, MCSymbol *Symbol, +void MCStreamer::EmitTBSSSymbol(MCSection *Section, MCSymbol *Symbol, uint64_t Size, unsigned ByteAlignment) {} -void MCStreamer::ChangeSection(const MCSection *, const MCExpr *) {} +void MCStreamer::ChangeSection(MCSection *, const MCExpr *) {} void MCStreamer::EmitWeakReference(MCSymbol *Alias, const MCSymbol *Symbol) {} void MCStreamer::EmitBytes(StringRef Data) {} void MCStreamer::EmitValueImpl(const MCExpr *Value, unsigned Size, @@ -661,3 +697,29 @@ void MCStreamer::EmitBundleAlignMode(unsigned AlignPow2) {} void MCStreamer::EmitBundleLock(bool AlignToEnd) {} void MCStreamer::FinishImpl() {} void MCStreamer::EmitBundleUnlock() {} + +void MCStreamer::SwitchSection(MCSection *Section, const MCExpr *Subsection) { + assert(Section && "Cannot switch to a null section!"); + MCSectionSubPair curSection = SectionStack.back().first; + SectionStack.back().second = curSection; + if (MCSectionSubPair(Section, Subsection) != curSection) { + ChangeSection(Section, Subsection); + SectionStack.back().first = MCSectionSubPair(Section, Subsection); + assert(!Section->hasEnded() && "Section already ended"); + MCSymbol *Sym = Section->getBeginSymbol(); + if (Sym && !Sym->isInSection()) + EmitLabel(Sym); + } +} + +MCSymbol *MCStreamer::endSection(MCSection *Section) { + // TODO: keep track of the last subsection so that this symbol appears in the + // correct place. + MCSymbol *Sym = Section->getEndSymbol(Context); + if (Sym->isInSection()) + return Sym; + + SwitchSection(Section); + EmitLabel(Sym); + return Sym; +}