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