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//===- MipsInstructionSelector.cpp ------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
/// \file
/// This file implements the targeting of the InstructionSelector class for
/// Mips.
/// \todo This should be generated by TableGen.
//===----------------------------------------------------------------------===//
#include "MipsRegisterBankInfo.h"
#include "MipsSubtarget.h"
#include "MipsTargetMachine.h"
#include "llvm/Support/Debug.h"
using namespace llvm;
namespace {
class MipsInstructionSelector : public InstructionSelector {
public:
MipsInstructionSelector(const MipsTargetMachine &TM, const MipsSubtarget &STI,
const MipsRegisterBankInfo &RBI);
bool select(MachineInstr &I, CodeGenCoverage &CoverageInfo) const override;
private:
const MipsInstrInfo &TII;
const MipsRegisterInfo &TRI;
};
} // end anonymous namespace
MipsInstructionSelector::MipsInstructionSelector(
const MipsTargetMachine &TM, const MipsSubtarget &STI,
const MipsRegisterBankInfo &RBI)
: InstructionSelector(), TII(*STI.getInstrInfo()),
TRI(*STI.getRegisterInfo()) {}
bool MipsInstructionSelector::select(MachineInstr &I,
CodeGenCoverage &CoverageInfo) const {
if (!isPreISelGenericOpcode(I.getOpcode())) {
// Not global isel generic opcode.
// TODO: select copy
return true;
}
// We didn't select anything.
return false;
}
namespace llvm {
InstructionSelector *createMipsInstructionSelector(const MipsTargetMachine &TM,
MipsSubtarget &Subtarget,
MipsRegisterBankInfo &RBI) {
return new MipsInstructionSelector(TM, Subtarget, RBI);
}
} // end namespace llvm
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