X-Git-Url: http://plrg.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FTarget%2FPowerPC%2FMCTargetDesc%2FPPCMCTargetDesc.cpp;h=2f7a768ddf87ab2d57da3c702ee1a19edcf5f063;hb=c7c4c36694862c191337b5b9e8de41a177ef4ff0;hp=5f7a39a368e91087ef23cc6f5599710dca440db8;hpb=f38cc38fa647d4e72c053c39bbe0cdec1342535f;p=oota-llvm.git diff --git a/lib/Target/PowerPC/MCTargetDesc/PPCMCTargetDesc.cpp b/lib/Target/PowerPC/MCTargetDesc/PPCMCTargetDesc.cpp index 5f7a39a368e..2f7a768ddf8 100644 --- a/lib/Target/PowerPC/MCTargetDesc/PPCMCTargetDesc.cpp +++ b/lib/Target/PowerPC/MCTargetDesc/PPCMCTargetDesc.cpp @@ -14,15 +14,24 @@ #include "PPCMCTargetDesc.h" #include "InstPrinter/PPCInstPrinter.h" #include "PPCMCAsmInfo.h" +#include "PPCTargetStreamer.h" #include "llvm/MC/MCCodeGenInfo.h" +#include "llvm/MC/MCELF.h" +#include "llvm/MC/MCELFStreamer.h" +#include "llvm/MC/MCExpr.h" #include "llvm/MC/MCInstrInfo.h" #include "llvm/MC/MCRegisterInfo.h" #include "llvm/MC/MCStreamer.h" #include "llvm/MC/MCSubtargetInfo.h" +#include "llvm/MC/MCSymbol.h" #include "llvm/MC/MachineLocation.h" +#include "llvm/Support/ELF.h" #include "llvm/Support/ErrorHandling.h" +#include "llvm/Support/FormattedStream.h" #include "llvm/Support/TargetRegistry.h" +using namespace llvm; + #define GET_INSTRINFO_MC_DESC #include "PPCGenInstrInfo.inc" @@ -32,7 +41,9 @@ #define GET_REGINFO_MC_DESC #include "PPCGenRegisterInfo.inc" -using namespace llvm; +// Pin the vtable to this file. +PPCTargetStreamer::~PPCTargetStreamer() {} +PPCTargetStreamer::PPCTargetStreamer(MCStreamer &S) : MCTargetStreamer(S) {} static MCInstrInfo *createPPCMCInstrInfo() { MCInstrInfo *X = new MCInstrInfo(); @@ -66,14 +77,14 @@ static MCAsmInfo *createPPCMCAsmInfo(const MCRegisterInfo &MRI, StringRef TT) { MCAsmInfo *MAI; if (TheTriple.isOSDarwin()) - MAI = new PPCMCAsmInfoDarwin(isPPC64); + MAI = new PPCMCAsmInfoDarwin(isPPC64, TheTriple); else - MAI = new PPCLinuxMCAsmInfo(isPPC64); + MAI = new PPCELFMCAsmInfo(isPPC64, TheTriple); // Initial state of the frame pointer is R1. unsigned Reg = isPPC64 ? PPC::X1 : PPC::R1; MCCFIInstruction Inst = - MCCFIInstruction::createDefCfa(0, MRI.getDwarfRegNum(Reg, true), 0); + MCCFIInstruction::createDefCfa(nullptr, MRI.getDwarfRegNum(Reg, true), 0); MAI->addInitialFrameState(Inst); return MAI; @@ -101,17 +112,130 @@ static MCCodeGenInfo *createPPCMCCodeGenInfo(StringRef TT, Reloc::Model RM, return X; } -// This is duplicated code. Refactor this. -static MCStreamer *createMCStreamer(const Target &T, StringRef TT, - MCContext &Ctx, MCAsmBackend &MAB, - raw_ostream &OS, - MCCodeEmitter *Emitter, - bool RelaxAll, - bool NoExecStack) { - if (Triple(TT).isOSDarwin()) - return createMachOStreamer(Ctx, MAB, OS, Emitter, RelaxAll); - - return createELFStreamer(Ctx, MAB, OS, Emitter, RelaxAll, NoExecStack); +namespace { +class PPCTargetAsmStreamer : public PPCTargetStreamer { + formatted_raw_ostream &OS; + +public: + PPCTargetAsmStreamer(MCStreamer &S, formatted_raw_ostream &OS) + : PPCTargetStreamer(S), OS(OS) {} + void emitTCEntry(const MCSymbol &S) override { + OS << "\t.tc "; + OS << S.getName(); + OS << "[TC],"; + OS << S.getName(); + OS << '\n'; + } + void emitMachine(StringRef CPU) override { + OS << "\t.machine " << CPU << '\n'; + } + void emitAbiVersion(int AbiVersion) override { + OS << "\t.abiversion " << AbiVersion << '\n'; + } + void emitLocalEntry(MCSymbol *S, const MCExpr *LocalOffset) override { + OS << "\t.localentry\t" << *S << ", " << *LocalOffset << '\n'; + } +}; + +class PPCTargetELFStreamer : public PPCTargetStreamer { +public: + PPCTargetELFStreamer(MCStreamer &S) : PPCTargetStreamer(S) {} + MCELFStreamer &getStreamer() { + return static_cast(Streamer); + } + void emitTCEntry(const MCSymbol &S) override { + // Creates a R_PPC64_TOC relocation + Streamer.EmitValueToAlignment(8); + Streamer.EmitSymbolValue(&S, 8); + } + void emitMachine(StringRef CPU) override { + // FIXME: Is there anything to do in here or does this directive only + // limit the parser? + } + void emitAbiVersion(int AbiVersion) override { + MCAssembler &MCA = getStreamer().getAssembler(); + unsigned Flags = MCA.getELFHeaderEFlags(); + Flags &= ~ELF::EF_PPC64_ABI; + Flags |= (AbiVersion & ELF::EF_PPC64_ABI); + MCA.setELFHeaderEFlags(Flags); + } + void emitLocalEntry(MCSymbol *S, const MCExpr *LocalOffset) override { + MCAssembler &MCA = getStreamer().getAssembler(); + MCSymbolData &Data = getStreamer().getOrCreateSymbolData(S); + + int64_t Res; + if (!LocalOffset->EvaluateAsAbsolute(Res, MCA)) + report_fatal_error(".localentry expression must be absolute."); + + unsigned Encoded = ELF::encodePPC64LocalEntryOffset(Res); + if (Res != ELF::decodePPC64LocalEntryOffset(Encoded)) + report_fatal_error(".localentry expression cannot be encoded."); + + // The "other" values are stored in the last 6 bits of the second byte. + // The traditional defines for STO values assume the full byte and thus + // the shift to pack it. + unsigned Other = MCELF::getOther(Data) << 2; + Other &= ~ELF::STO_PPC64_LOCAL_MASK; + Other |= Encoded; + MCELF::setOther(Data, Other >> 2); + + // For GAS compatibility, unless we already saw a .abiversion directive, + // set e_flags to indicate ELFv2 ABI. + unsigned Flags = MCA.getELFHeaderEFlags(); + if ((Flags & ELF::EF_PPC64_ABI) == 0) + MCA.setELFHeaderEFlags(Flags | 2); + } + void emitAssignment(MCSymbol *Symbol, const MCExpr *Value) override { + // When encoding an assignment to set symbol A to symbol B, also copy + // the st_other bits encoding the local entry point offset. + if (Value->getKind() != MCExpr::SymbolRef) + return; + const MCSymbol &RhsSym = + static_cast(Value)->getSymbol(); + MCSymbolData &Data = getStreamer().getOrCreateSymbolData(&RhsSym); + MCSymbolData &SymbolData = getStreamer().getOrCreateSymbolData(Symbol); + // The "other" values are stored in the last 6 bits of the second byte. + // The traditional defines for STO values assume the full byte and thus + // the shift to pack it. + unsigned Other = MCELF::getOther(SymbolData) << 2; + Other &= ~ELF::STO_PPC64_LOCAL_MASK; + Other |= (MCELF::getOther(Data) << 2) & ELF::STO_PPC64_LOCAL_MASK; + MCELF::setOther(SymbolData, Other >> 2); + } +}; + +class PPCTargetMachOStreamer : public PPCTargetStreamer { +public: + PPCTargetMachOStreamer(MCStreamer &S) : PPCTargetStreamer(S) {} + void emitTCEntry(const MCSymbol &S) override { + llvm_unreachable("Unknown pseudo-op: .tc"); + } + void emitMachine(StringRef CPU) override { + // FIXME: We should update the CPUType, CPUSubType in the Object file if + // the new values are different from the defaults. + } + void emitAbiVersion(int AbiVersion) override { + llvm_unreachable("Unknown pseudo-op: .abiversion"); + } + void emitLocalEntry(MCSymbol *S, const MCExpr *LocalOffset) override { + llvm_unreachable("Unknown pseudo-op: .localentry"); + } +}; +} + +static MCTargetStreamer *createAsmTargetStreamer(MCStreamer &S, + formatted_raw_ostream &OS, + MCInstPrinter *InstPrint, + bool isVerboseAsm) { + return new PPCTargetAsmStreamer(S, OS); +} + +static MCTargetStreamer * +createObjectTargetStreamer(MCStreamer &S, const MCSubtargetInfo &STI) { + Triple TT(STI.getTargetTriple()); + if (TT.getObjectFormat() == Triple::ELF) + return new PPCTargetELFStreamer(S); + return new PPCTargetMachOStreamer(S); } static MCInstPrinter *createPPCMCInstPrinter(const Target &T, @@ -125,55 +249,36 @@ static MCInstPrinter *createPPCMCInstPrinter(const Target &T, } extern "C" void LLVMInitializePowerPCTargetMC() { - // Register the MC asm info. - RegisterMCAsmInfoFn C(ThePPC32Target, createPPCMCAsmInfo); - RegisterMCAsmInfoFn D(ThePPC64Target, createPPCMCAsmInfo); - RegisterMCAsmInfoFn E(ThePPC64LETarget, createPPCMCAsmInfo); - - // Register the MC codegen info. - TargetRegistry::RegisterMCCodeGenInfo(ThePPC32Target, createPPCMCCodeGenInfo); - TargetRegistry::RegisterMCCodeGenInfo(ThePPC64Target, createPPCMCCodeGenInfo); - TargetRegistry::RegisterMCCodeGenInfo(ThePPC64LETarget, - createPPCMCCodeGenInfo); - - // Register the MC instruction info. - TargetRegistry::RegisterMCInstrInfo(ThePPC32Target, createPPCMCInstrInfo); - TargetRegistry::RegisterMCInstrInfo(ThePPC64Target, createPPCMCInstrInfo); - TargetRegistry::RegisterMCInstrInfo(ThePPC64LETarget, - createPPCMCInstrInfo); - - // Register the MC register info. - TargetRegistry::RegisterMCRegInfo(ThePPC32Target, createPPCMCRegisterInfo); - TargetRegistry::RegisterMCRegInfo(ThePPC64Target, createPPCMCRegisterInfo); - TargetRegistry::RegisterMCRegInfo(ThePPC64LETarget, createPPCMCRegisterInfo); - - // Register the MC subtarget info. - TargetRegistry::RegisterMCSubtargetInfo(ThePPC32Target, - createPPCMCSubtargetInfo); - TargetRegistry::RegisterMCSubtargetInfo(ThePPC64Target, - createPPCMCSubtargetInfo); - TargetRegistry::RegisterMCSubtargetInfo(ThePPC64LETarget, - createPPCMCSubtargetInfo); - - // Register the MC Code Emitter - TargetRegistry::RegisterMCCodeEmitter(ThePPC32Target, createPPCMCCodeEmitter); - TargetRegistry::RegisterMCCodeEmitter(ThePPC64Target, createPPCMCCodeEmitter); - TargetRegistry::RegisterMCCodeEmitter(ThePPC64LETarget, - createPPCMCCodeEmitter); - + for (Target *T : {&ThePPC32Target, &ThePPC64Target, &ThePPC64LETarget}) { + // Register the MC asm info. + RegisterMCAsmInfoFn C(*T, createPPCMCAsmInfo); + + // Register the MC codegen info. + TargetRegistry::RegisterMCCodeGenInfo(*T, createPPCMCCodeGenInfo); + + // Register the MC instruction info. + TargetRegistry::RegisterMCInstrInfo(*T, createPPCMCInstrInfo); + + // Register the MC register info. + TargetRegistry::RegisterMCRegInfo(*T, createPPCMCRegisterInfo); + + // Register the MC subtarget info. + TargetRegistry::RegisterMCSubtargetInfo(*T, createPPCMCSubtargetInfo); + + // Register the MC Code Emitter + TargetRegistry::RegisterMCCodeEmitter(*T, createPPCMCCodeEmitter); + // Register the asm backend. - TargetRegistry::RegisterMCAsmBackend(ThePPC32Target, createPPCAsmBackend); - TargetRegistry::RegisterMCAsmBackend(ThePPC64Target, createPPCAsmBackend); - TargetRegistry::RegisterMCAsmBackend(ThePPC64LETarget, createPPCAsmBackend); - - // Register the object streamer. - TargetRegistry::RegisterMCObjectStreamer(ThePPC32Target, createMCStreamer); - TargetRegistry::RegisterMCObjectStreamer(ThePPC64Target, createMCStreamer); - TargetRegistry::RegisterMCObjectStreamer(ThePPC64LETarget, createMCStreamer); - - // Register the MCInstPrinter. - TargetRegistry::RegisterMCInstPrinter(ThePPC32Target, createPPCMCInstPrinter); - TargetRegistry::RegisterMCInstPrinter(ThePPC64Target, createPPCMCInstPrinter); - TargetRegistry::RegisterMCInstPrinter(ThePPC64LETarget, - createPPCMCInstPrinter); + TargetRegistry::RegisterMCAsmBackend(*T, createPPCAsmBackend); + + // Register the object target streamer. + TargetRegistry::RegisterObjectTargetStreamer(*T, + createObjectTargetStreamer); + + // Register the asm target streamer. + TargetRegistry::RegisterAsmTargetStreamer(*T, createAsmTargetStreamer); + + // Register the MCInstPrinter. + TargetRegistry::RegisterMCInstPrinter(*T, createPPCMCInstPrinter); + } }