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103 lines
3.5 KiB
C++
103 lines
3.5 KiB
C++
//===-- MBlazeTargetMachine.cpp - Define TargetMachine for MBlaze ---------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// Implements the info about MBlaze target spec.
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//
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//===----------------------------------------------------------------------===//
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#include "MBlaze.h"
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#include "MBlazeTargetMachine.h"
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#include "llvm/PassManager.h"
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#include "llvm/CodeGen/Passes.h"
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#include "llvm/Support/FormattedStream.h"
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#include "llvm/Target/TargetOptions.h"
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#include "llvm/Target/TargetRegistry.h"
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using namespace llvm;
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static MCStreamer *createMCStreamer(const Target &T, const std::string &TT,
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MCContext &Ctx, TargetAsmBackend &TAB,
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raw_ostream &_OS,
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MCCodeEmitter *_Emitter,
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bool RelaxAll,
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bool NoExecStack) {
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Triple TheTriple(TT);
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if (TheTriple.isOSDarwin()) {
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llvm_unreachable("MBlaze does not support Darwin MACH-O format");
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return NULL;
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}
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if (TheTriple.isOSWindows()) {
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llvm_unreachable("MBlaze does not support Windows COFF format");
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return NULL;
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}
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return createELFStreamer(Ctx, TAB, _OS, _Emitter, RelaxAll, NoExecStack);
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}
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extern "C" void LLVMInitializeMBlazeTarget() {
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// Register the target.
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RegisterTargetMachine<MBlazeTargetMachine> X(TheMBlazeTarget);
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// Register the MC code emitter
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TargetRegistry::RegisterCodeEmitter(TheMBlazeTarget,
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llvm::createMBlazeMCCodeEmitter);
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// Register the asm backend
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TargetRegistry::RegisterAsmBackend(TheMBlazeTarget,
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createMBlazeAsmBackend);
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// Register the object streamer
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TargetRegistry::RegisterObjectStreamer(TheMBlazeTarget,
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createMCStreamer);
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}
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// DataLayout --> Big-endian, 32-bit pointer/ABI/alignment
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// The stack is always 8 byte aligned
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// On function prologue, the stack is created by decrementing
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// its pointer. Once decremented, all references are done with positive
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// offset from the stack/frame pointer, using StackGrowsUp enables
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// an easier handling.
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MBlazeTargetMachine::
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MBlazeTargetMachine(const Target &T, const std::string &TT,
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const std::string &CPU, const std::string &FS):
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LLVMTargetMachine(T, TT, CPU, FS),
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Subtarget(TT, CPU, FS),
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DataLayout("E-p:32:32:32-i8:8:8-i16:16:16"),
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InstrInfo(*this),
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FrameLowering(Subtarget),
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TLInfo(*this), TSInfo(*this), ELFWriterInfo(*this),
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InstrItins(Subtarget.getInstrItineraryData()) {
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if (getRelocationModel() == Reloc::Default) {
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setRelocationModel(Reloc::Static);
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}
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if (getCodeModel() == CodeModel::Default)
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setCodeModel(CodeModel::Small);
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}
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// Install an instruction selector pass using
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// the ISelDag to gen MBlaze code.
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bool MBlazeTargetMachine::addInstSelector(PassManagerBase &PM,
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CodeGenOpt::Level OptLevel) {
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PM.add(createMBlazeISelDag(*this));
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return false;
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}
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// Implemented by targets that want to run passes immediately before
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// machine code is emitted. return true if -print-machineinstrs should
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// print out the code after the passes.
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bool MBlazeTargetMachine::addPreEmitPass(PassManagerBase &PM,
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CodeGenOpt::Level OptLevel) {
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PM.add(createMBlazeDelaySlotFillerPass(*this));
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return true;
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}
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