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//===-- MipsTargetMachine.cpp - Define TargetMachine for Mips -------------===//
//
// 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 Mips target spec.
//
//===----------------------------------------------------------------------===//
#include "Mips.h"
#include "MipsTargetAsmInfo.h"
#include "MipsTargetMachine.h"
#include "llvm/Module.h"
#include "llvm/PassManager.h"
#include "llvm/Target/TargetMachineRegistry.h"
using namespace llvm;
namespace {
// Register the target.
RegisterTarget<MipsTargetMachine> X("mips", " Mips");
}
const TargetAsmInfo *MipsTargetMachine::
createTargetAsmInfo() const
{
return new MipsTargetAsmInfo(*this);
}
// 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, so StackGrowsUp is used.
// When using CodeModel::Large the behaviour
//
//
MipsTargetMachine::
MipsTargetMachine(const Module &M, const std::string &FS):
Subtarget(*this, M, FS), DataLayout("E-p:32:32:32"),
InstrInfo(*this), FrameInfo(TargetFrameInfo::StackGrowsUp, 8, 0),
TLInfo(*this)
{
if (getRelocationModel() != Reloc::Static)
setRelocationModel(Reloc::PIC_);
if (getCodeModel() == CodeModel::Default)
setCodeModel(CodeModel::Small);
}
// return 0 and must specify -march to gen MIPS code.
unsigned MipsTargetMachine::
getModuleMatchQuality(const Module &M)
{
// We strongly match "mips-*".
std::string TT = M.getTargetTriple();
if (TT.size() >= 5 && std::string(TT.begin(), TT.begin()+5) == "mips-")
return 20;
return 0;
}
// Install an instruction selector pass using
// the ISelDag to gen Mips code.
bool MipsTargetMachine::
addInstSelector(FunctionPassManager &PM, bool Fast)
{
PM.add(createMipsISelDag(*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 MipsTargetMachine::
addPreEmitPass(FunctionPassManager &PM, bool Fast)
{
PM.add(createMipsDelaySlotFillerPass(*this));
return true;
}
// Implements the AssemblyEmitter for the target. Must return
// true if AssemblyEmitter is supported
bool MipsTargetMachine::
addAssemblyEmitter(FunctionPassManager &PM, bool Fast,
std::ostream &Out)
{
// Output assembly language.
PM.add(createMipsCodePrinterPass(Out, *this));
return false;
}
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