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| //===-- RISCVInstructionSelector.cpp -----------------------------*- C++ -*-==//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
/// \file
/// This file implements the targeting of the InstructionSelector class for
/// RISCV.
/// \todo This should be generated by TableGen.
//===----------------------------------------------------------------------===//
#include "RISCVRegisterBankInfo.h"
#include "RISCVSubtarget.h"
#include "RISCVTargetMachine.h"
#include "llvm/CodeGen/GlobalISel/InstructionSelector.h"
#include "llvm/CodeGen/GlobalISel/InstructionSelectorImpl.h"
#include "llvm/Support/Debug.h"
#define DEBUG_TYPE "riscv-isel"
using namespace llvm;
#define GET_GLOBALISEL_PREDICATE_BITSET
#include "RISCVGenGlobalISel.inc"
#undef GET_GLOBALISEL_PREDICATE_BITSET
namespace {
class RISCVInstructionSelector : public InstructionSelector {
public:
RISCVInstructionSelector(const RISCVTargetMachine &TM,
const RISCVSubtarget &STI,
const RISCVRegisterBankInfo &RBI);
bool select(MachineInstr &I) override;
static const char *getName() { return DEBUG_TYPE; }
private:
bool selectImpl(MachineInstr &I, CodeGenCoverage &CoverageInfo) const;
const RISCVSubtarget &STI;
const RISCVInstrInfo &TII;
const RISCVRegisterInfo &TRI;
const RISCVRegisterBankInfo &RBI;
// FIXME: This is necessary because DAGISel uses "Subtarget->" and GlobalISel
// uses "STI." in the code generated by TableGen. We need to unify the name of
// Subtarget variable.
const RISCVSubtarget *Subtarget = &STI;
#define GET_GLOBALISEL_PREDICATES_DECL
#include "RISCVGenGlobalISel.inc"
#undef GET_GLOBALISEL_PREDICATES_DECL
#define GET_GLOBALISEL_TEMPORARIES_DECL
#include "RISCVGenGlobalISel.inc"
#undef GET_GLOBALISEL_TEMPORARIES_DECL
};
} // end anonymous namespace
#define GET_GLOBALISEL_IMPL
#include "RISCVGenGlobalISel.inc"
#undef GET_GLOBALISEL_IMPL
RISCVInstructionSelector::RISCVInstructionSelector(
const RISCVTargetMachine &TM, const RISCVSubtarget &STI,
const RISCVRegisterBankInfo &RBI)
: InstructionSelector(), STI(STI), TII(*STI.getInstrInfo()),
TRI(*STI.getRegisterInfo()), RBI(RBI),
#define GET_GLOBALISEL_PREDICATES_INIT
#include "RISCVGenGlobalISel.inc"
#undef GET_GLOBALISEL_PREDICATES_INIT
#define GET_GLOBALISEL_TEMPORARIES_INIT
#include "RISCVGenGlobalISel.inc"
#undef GET_GLOBALISEL_TEMPORARIES_INIT
{
}
bool RISCVInstructionSelector::select(MachineInstr &I) {
if (!isPreISelGenericOpcode(I.getOpcode())) {
// Certain non-generic instructions also need some special handling.
return true;
}
if (selectImpl(I, *CoverageInfo))
return true;
return false;
}
namespace llvm {
InstructionSelector *
createRISCVInstructionSelector(const RISCVTargetMachine &TM,
RISCVSubtarget &Subtarget,
RISCVRegisterBankInfo &RBI) {
return new RISCVInstructionSelector(TM, Subtarget, RBI);
}
} // end namespace llvm
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