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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 "MipsTargetMachine.h"
#include "Mips.h"
#include "llvm/PassManager.h"
#include "llvm/CodeGen/Passes.h"
#include "llvm/Support/TargetRegistry.h"
using namespace llvm;
extern "C" void LLVMInitializeMipsTarget() {
// Register the target.
RegisterTargetMachine<MipsebTargetMachine> X(TheMipsTarget);
RegisterTargetMachine<MipselTargetMachine> Y(TheMipselTarget);
RegisterTargetMachine<Mips64ebTargetMachine> A(TheMips64Target);
RegisterTargetMachine<Mips64elTargetMachine> B(TheMips64elTarget);
}
// 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, StringRef TT,
StringRef CPU, StringRef FS, const TargetOptions &Options,
Reloc::Model RM, CodeModel::Model CM,
CodeGenOpt::Level OL,
bool isLittle)
: LLVMTargetMachine(T, TT, CPU, FS, Options, RM, CM, OL),
Subtarget(TT, CPU, FS, isLittle),
DataLayout(isLittle ?
(Subtarget.isABI_N64() ?
"e-p:64:64:64-i8:8:32-i16:16:32-i64:64:64-f128:128:128-n32" :
"e-p:32:32:32-i8:8:32-i16:16:32-i64:64:64-n32") :
(Subtarget.isABI_N64() ?
"E-p:64:64:64-i8:8:32-i16:16:32-i64:64:64-f128:128:128-n32" :
"E-p:32:32:32-i8:8:32-i16:16:32-i64:64:64-n32")),
InstrInfo(*this),
FrameLowering(Subtarget),
TLInfo(*this), TSInfo(*this), JITInfo() {
}
void MipsebTargetMachine::anchor() { }
MipsebTargetMachine::
MipsebTargetMachine(const Target &T, StringRef TT,
StringRef CPU, StringRef FS, const TargetOptions &Options,
Reloc::Model RM, CodeModel::Model CM,
CodeGenOpt::Level OL)
: MipsTargetMachine(T, TT, CPU, FS, Options, RM, CM, OL, false) {}
void MipselTargetMachine::anchor() { }
MipselTargetMachine::
MipselTargetMachine(const Target &T, StringRef TT,
StringRef CPU, StringRef FS, const TargetOptions &Options,
Reloc::Model RM, CodeModel::Model CM,
CodeGenOpt::Level OL)
: MipsTargetMachine(T, TT, CPU, FS, Options, RM, CM, OL, true) {}
void Mips64ebTargetMachine::anchor() { }
Mips64ebTargetMachine::
Mips64ebTargetMachine(const Target &T, StringRef TT,
StringRef CPU, StringRef FS, const TargetOptions &Options,
Reloc::Model RM, CodeModel::Model CM,
CodeGenOpt::Level OL)
: MipsTargetMachine(T, TT, CPU, FS, Options, RM, CM, OL, false) {}
void Mips64elTargetMachine::anchor() { }
Mips64elTargetMachine::
Mips64elTargetMachine(const Target &T, StringRef TT,
StringRef CPU, StringRef FS, const TargetOptions &Options,
Reloc::Model RM, CodeModel::Model CM,
CodeGenOpt::Level OL)
: MipsTargetMachine(T, TT, CPU, FS, Options, RM, CM, OL, true) {}
namespace {
/// Mips Code Generator Pass Configuration Options.
class MipsPassConfig : public TargetPassConfig {
public:
MipsPassConfig(MipsTargetMachine *TM, PassManagerBase &PM)
: TargetPassConfig(TM, PM) {}
MipsTargetMachine &getMipsTargetMachine() const {
return getTM<MipsTargetMachine>();
}
const MipsSubtarget &getMipsSubtarget() const {
return *getMipsTargetMachine().getSubtargetImpl();
}
virtual bool addInstSelector();
virtual bool addPreRegAlloc();
virtual bool addPreSched2();
virtual bool addPreEmitPass();
};
} // namespace
TargetPassConfig *MipsTargetMachine::createPassConfig(PassManagerBase &PM) {
return new MipsPassConfig(this, PM);
}
// Install an instruction selector pass using
// the ISelDag to gen Mips code.
bool MipsPassConfig::addInstSelector() {
PM->add(createMipsISelDag(getMipsTargetMachine()));
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 MipsPassConfig::addPreEmitPass() {
PM->add(createMipsDelaySlotFillerPass(getMipsTargetMachine()));
return true;
}
bool MipsPassConfig::addPreRegAlloc() {
// Do not restore $gp if target is Mips64.
// In N32/64, $gp is a callee-saved register.
if (!getMipsSubtarget().hasMips64())
PM->add(createMipsEmitGPRestorePass(getMipsTargetMachine()));
return true;
}
bool MipsPassConfig::addPreSched2() {
PM->add(createMipsExpandPseudoPass(getMipsTargetMachine()));
return true;
}
bool MipsTargetMachine::addCodeEmitter(PassManagerBase &PM,
JITCodeEmitter &JCE) {
// Machine code emitter pass for Mips.
PM.add(createMipsJITCodeEmitterPass(*this, JCE));
return false;
}
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