diff options
Diffstat (limited to 'lib/Target/SystemZ/MCTargetDesc/SystemZMCTargetDesc.cpp')
| -rw-r--r-- | lib/Target/SystemZ/MCTargetDesc/SystemZMCTargetDesc.cpp | 160 |
1 files changed, 160 insertions, 0 deletions
diff --git a/lib/Target/SystemZ/MCTargetDesc/SystemZMCTargetDesc.cpp b/lib/Target/SystemZ/MCTargetDesc/SystemZMCTargetDesc.cpp new file mode 100644 index 0000000000..20eb98d8d6 --- /dev/null +++ b/lib/Target/SystemZ/MCTargetDesc/SystemZMCTargetDesc.cpp @@ -0,0 +1,160 @@ +//===-- SystemZMCTargetDesc.cpp - SystemZ target descriptions -------------===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// + +#include "SystemZMCTargetDesc.h" +#include "InstPrinter/SystemZInstPrinter.h" +#include "SystemZMCAsmInfo.h" +#include "llvm/MC/MCCodeGenInfo.h" +#include "llvm/MC/MCInstrInfo.h" +#include "llvm/MC/MCStreamer.h" +#include "llvm/MC/MCSubtargetInfo.h" +#include "llvm/Support/TargetRegistry.h" + +#define GET_INSTRINFO_MC_DESC +#include "SystemZGenInstrInfo.inc" + +#define GET_SUBTARGETINFO_MC_DESC +#include "SystemZGenSubtargetInfo.inc" + +#define GET_REGINFO_MC_DESC +#include "SystemZGenRegisterInfo.inc" + +using namespace llvm; + +static MCAsmInfo *createSystemZMCAsmInfo(const Target &T, StringRef TT) { + MCAsmInfo *MAI = new SystemZMCAsmInfo(T, TT); + MachineLocation FPDst(MachineLocation::VirtualFP); + MachineLocation FPSrc(SystemZ::R15D, -SystemZMC::CFAOffsetFromInitialSP); + MAI->addInitialFrameState(0, FPDst, FPSrc); + return MAI; +} + +static MCInstrInfo *createSystemZMCInstrInfo() { + MCInstrInfo *X = new MCInstrInfo(); + InitSystemZMCInstrInfo(X); + return X; +} + +static MCRegisterInfo *createSystemZMCRegisterInfo(StringRef TT) { + MCRegisterInfo *X = new MCRegisterInfo(); + InitSystemZMCRegisterInfo(X, SystemZ::R14D); + return X; +} + +static MCSubtargetInfo *createSystemZMCSubtargetInfo(StringRef TT, + StringRef CPU, + StringRef FS) { + MCSubtargetInfo *X = new MCSubtargetInfo(); + InitSystemZMCSubtargetInfo(X, TT, CPU, FS); + return X; +} + +static MCCodeGenInfo *createSystemZMCCodeGenInfo(StringRef TT, Reloc::Model RM, + CodeModel::Model CM, + CodeGenOpt::Level) { + MCCodeGenInfo *X = new MCCodeGenInfo(); + + // Static code is suitable for use in a dynamic executable; there is no + // separate DynamicNoPIC model. + if (RM == Reloc::Default || RM == Reloc::DynamicNoPIC) + RM = Reloc::Static; + + // For SystemZ we define the models as follows: + // + // Small: BRASL can call any function and will use a stub if necessary. + // Locally-binding symbols will always be in range of LARL. + // + // Medium: BRASL can call any function and will use a stub if necessary. + // GOT slots and locally-defined text will always be in range + // of LARL, but other symbols might not be. + // + // Large: Equivalent to Medium for now. + // + // Kernel: Equivalent to Medium for now. + // + // This means that any PIC module smaller than 4GB meets the + // requirements of Small, so Small seems like the best default there. + // + // All symbols bind locally in a non-PIC module, so the choice is less + // obvious. There are two cases: + // + // - When creating an executable, PLTs and copy relocations allow + // us to treat external symbols as part of the executable. + // Any executable smaller than 4GB meets the requirements of Small, + // so that seems like the best default. + // + // - When creating JIT code, stubs will be in range of BRASL if the + // image is less than 4GB in size. GOT entries will likewise be + // in range of LARL. However, the JIT environment has no equivalent + // of copy relocs, so locally-binding data symbols might not be in + // the range of LARL. We need the Medium model in that case. + if (CM == CodeModel::Default) + CM = CodeModel::Small; + else if (CM == CodeModel::JITDefault) + CM = RM == Reloc::PIC_ ? CodeModel::Small : CodeModel::Medium; + X->InitMCCodeGenInfo(RM, CM); + return X; +} + +static MCInstPrinter *createSystemZMCInstPrinter(const Target &T, + unsigned SyntaxVariant, + const MCAsmInfo &MAI, + const MCInstrInfo &MII, + const MCRegisterInfo &MRI, + const MCSubtargetInfo &STI) { + return new SystemZInstPrinter(MAI, MII, MRI); +} + +static MCStreamer *createSystemZMCObjectStreamer(const Target &T, StringRef TT, + MCContext &Ctx, + MCAsmBackend &MAB, + raw_ostream &OS, + MCCodeEmitter *Emitter, + bool RelaxAll, + bool NoExecStack) { + return createELFStreamer(Ctx, MAB, OS, Emitter, RelaxAll, NoExecStack); +} + +extern "C" void LLVMInitializeSystemZTargetMC() { + // Register the MCAsmInfo. + TargetRegistry::RegisterMCAsmInfo(TheSystemZTarget, + createSystemZMCAsmInfo); + + // Register the MCCodeGenInfo. + TargetRegistry::RegisterMCCodeGenInfo(TheSystemZTarget, + createSystemZMCCodeGenInfo); + + // Register the MCCodeEmitter. + TargetRegistry::RegisterMCCodeEmitter(TheSystemZTarget, + createSystemZMCCodeEmitter); + + // Register the MCInstrInfo. + TargetRegistry::RegisterMCInstrInfo(TheSystemZTarget, + createSystemZMCInstrInfo); + + // Register the MCRegisterInfo. + TargetRegistry::RegisterMCRegInfo(TheSystemZTarget, + createSystemZMCRegisterInfo); + + // Register the MCSubtargetInfo. + TargetRegistry::RegisterMCSubtargetInfo(TheSystemZTarget, + createSystemZMCSubtargetInfo); + + // Register the MCAsmBackend. + TargetRegistry::RegisterMCAsmBackend(TheSystemZTarget, + createSystemZMCAsmBackend); + + // Register the MCInstPrinter. + TargetRegistry::RegisterMCInstPrinter(TheSystemZTarget, + createSystemZMCInstPrinter); + + // Register the MCObjectStreamer; + TargetRegistry::RegisterMCObjectStreamer(TheSystemZTarget, + createSystemZMCObjectStreamer); +} |