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//===-- MBlazeTargetMachine.cpp - Define TargetMachine for MBlaze ---------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// Implements the info about MBlaze target spec.
//
//===----------------------------------------------------------------------===//
#include "MBlaze.h"
#include "MBlazeMCAsmInfo.h"
#include "MBlazeTargetMachine.h"
#include "llvm/PassManager.h"
#include "llvm/CodeGen/Passes.h"
#include "llvm/Support/FormattedStream.h"
#include "llvm/Target/TargetOptions.h"
#include "llvm/Target/TargetRegistry.h"
using namespace llvm;
static MCAsmInfo *createMCAsmInfo(const Target &T, StringRef TT) {
Triple TheTriple(TT);
switch (TheTriple.getOS()) {
default:
return new MBlazeMCAsmInfo();
}
}
static MCStreamer *createMCStreamer(const Target &T, const std::string &TT,
MCContext &Ctx, TargetAsmBackend &TAB,
raw_ostream &_OS,
MCCodeEmitter *_Emitter,
bool RelaxAll) {
Triple TheTriple(TT);
switch (TheTriple.getOS()) {
case Triple::Darwin:
llvm_unreachable("MBlaze does not support Darwin MACH-O format");
return NULL;
case Triple::MinGW32:
case Triple::MinGW64:
case Triple::Cygwin:
case Triple::Win32:
llvm_unreachable("ARM does not support Windows COFF format");
return NULL;
default:
return createELFStreamer(Ctx, TAB, _OS, _Emitter, RelaxAll);
}
}
extern "C" void LLVMInitializeMBlazeTarget() {
// Register the target.
RegisterTargetMachine<MBlazeTargetMachine> X(TheMBlazeTarget);
// Register the target asm info.
RegisterAsmInfoFn A(TheMBlazeTarget, createMCAsmInfo);
// Register the MC code emitter
TargetRegistry::RegisterCodeEmitter(TheMBlazeTarget,
llvm::createMBlazeMCCodeEmitter);
// Register the asm backend
TargetRegistry::RegisterAsmBackend(TheMBlazeTarget,
createMBlazeAsmBackend);
// Register the object streamer
TargetRegistry::RegisterObjectStreamer(TheMBlazeTarget,
createMCStreamer);
}
// DataLayout --> Big-endian, 32-bit pointer/ABI/alignment
// The stack is always 8 byte aligned
// On function prologue, the stack is created by decrementing
// its pointer. Once decremented, all references are done with positive
// offset from the stack/frame pointer, using StackGrowsUp enables
// an easier handling.
MBlazeTargetMachine::
MBlazeTargetMachine(const Target &T, const std::string &TT,
const std::string &FS):
LLVMTargetMachine(T, TT),
Subtarget(TT, FS),
DataLayout("E-p:32:32:32-i8:8:8-i16:16:16"),
InstrInfo(*this),
FrameInfo(Subtarget),
TLInfo(*this), TSInfo(*this), ELFWriterInfo(*this) {
if (getRelocationModel() == Reloc::Default) {
setRelocationModel(Reloc::Static);
}
if (getCodeModel() == CodeModel::Default)
setCodeModel(CodeModel::Small);
}
// Install an instruction selector pass using
// the ISelDag to gen MBlaze code.
bool MBlazeTargetMachine::
addInstSelector(PassManagerBase &PM, CodeGenOpt::Level OptLevel) {
PM.add(createMBlazeISelDag(*this));
return false;
}
// Implemented by targets that want to run passes immediately before
// machine code is emitted. return true if -print-machineinstrs should
// print out the code after the passes.
bool MBlazeTargetMachine::
addPreEmitPass(PassManagerBase &PM, CodeGenOpt::Level OptLevel) {
PM.add(createMBlazeDelaySlotFillerPass(*this));
return true;
}
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