forked from OSchip/llvm-project
83 lines
2.9 KiB
C++
83 lines
2.9 KiB
C++
//===-- 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 "MipsMCAsmInfo.h"
|
|
#include "MipsTargetMachine.h"
|
|
#include "llvm/PassManager.h"
|
|
#include "llvm/Target/TargetRegistry.h"
|
|
using namespace llvm;
|
|
|
|
extern "C" void LLVMInitializeMipsTarget() {
|
|
// Register the target.
|
|
RegisterTargetMachine<MipsTargetMachine> X(TheMipsTarget);
|
|
RegisterTargetMachine<MipselTargetMachine> Y(TheMipselTarget);
|
|
RegisterAsmInfo<MipsMCAsmInfo> A(TheMipsTarget);
|
|
RegisterAsmInfo<MipsMCAsmInfo> B(TheMipselTarget);
|
|
}
|
|
|
|
// 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.
|
|
// Using CodeModel::Large enables different CALL behavior.
|
|
MipsTargetMachine::
|
|
MipsTargetMachine(const Target &T, const std::string &TT, const std::string &FS,
|
|
bool isLittle=false):
|
|
LLVMTargetMachine(T, TT),
|
|
Subtarget(TT, FS, isLittle),
|
|
DataLayout(isLittle ? std::string("e-p:32:32:32-i8:8:32-i16:16:32") :
|
|
std::string("E-p:32:32:32-i8:8:32-i16:16:32")),
|
|
InstrInfo(*this),
|
|
FrameInfo(TargetFrameInfo::StackGrowsUp, 8, 0),
|
|
TLInfo(*this) {
|
|
// Abicall enables PIC by default
|
|
if (getRelocationModel() == Reloc::Default) {
|
|
if (Subtarget.isABI_O32())
|
|
setRelocationModel(Reloc::PIC_);
|
|
else
|
|
setRelocationModel(Reloc::Static);
|
|
}
|
|
|
|
// TODO: create an option to enable long calls, like -mlong-calls,
|
|
// that would be our CodeModel::Large. It must not work with Abicall.
|
|
if (getCodeModel() == CodeModel::Default)
|
|
setCodeModel(CodeModel::Small);
|
|
}
|
|
|
|
MipselTargetMachine::
|
|
MipselTargetMachine(const Target &T, const std::string &TT,
|
|
const std::string &FS) :
|
|
MipsTargetMachine(T, TT, FS, true) {}
|
|
|
|
// Install an instruction selector pass using
|
|
// the ISelDag to gen Mips code.
|
|
bool MipsTargetMachine::
|
|
addInstSelector(PassManagerBase &PM, CodeGenOpt::Level OptLevel)
|
|
{
|
|
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(PassManagerBase &PM, CodeGenOpt::Level OptLevel)
|
|
{
|
|
PM.add(createMipsDelaySlotFillerPass(*this));
|
|
return true;
|
|
}
|