forked from OSchip/llvm-project
105 lines
3.2 KiB
C++
105 lines
3.2 KiB
C++
//===-- 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/IR/IntrinsicsRISCV.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
|