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//===-- RISCVSubtarget.cpp - RISCV Subtarget Information ------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
//
// This file implements the RISCV specific subclass of TargetSubtargetInfo.
//
//===----------------------------------------------------------------------===//
#include "RISCVSubtarget.h"
#include "RISCV.h"
#include "RISCVCallLowering.h"
#include "RISCVFrameLowering.h"
#include "RISCVLegalizerInfo.h"
#include "RISCVRegisterBankInfo.h"
#include "RISCVTargetMachine.h"
#include "llvm/Support/TargetRegistry.h"
using namespace llvm;
#define DEBUG_TYPE "riscv-subtarget"
#define GET_SUBTARGETINFO_TARGET_DESC
#define GET_SUBTARGETINFO_CTOR
#include "RISCVGenSubtargetInfo.inc"
void RISCVSubtarget::anchor() {}
RISCVSubtarget &RISCVSubtarget::initializeSubtargetDependencies(
const Triple &TT, StringRef CPU, StringRef FS, StringRef ABIName) {
// Determine default and user-specified characteristics
bool Is64Bit = TT.isArch64Bit();
std::string CPUName = std::string(CPU);
if (CPUName.empty())
CPUName = Is64Bit ? "generic-rv64" : "generic-rv32";
ParseSubtargetFeatures(CPUName, FS);
if (Is64Bit) {
XLenVT = MVT::i64;
XLen = 64;
}
TargetABI = RISCVABI::computeTargetABI(TT, getFeatureBits(), ABIName);
RISCVFeatures::validate(TT, getFeatureBits());
return *this;
}
RISCVSubtarget::RISCVSubtarget(const Triple &TT, StringRef CPU, StringRef FS,
StringRef ABIName, const TargetMachine &TM)
: RISCVGenSubtargetInfo(TT, CPU, FS),
UserReservedRegister(RISCV::NUM_TARGET_REGS),
FrameLowering(initializeSubtargetDependencies(TT, CPU, FS, ABIName)),
InstrInfo(*this), RegInfo(getHwMode()), TLInfo(TM, *this) {
CallLoweringInfo.reset(new RISCVCallLowering(*getTargetLowering()));
Legalizer.reset(new RISCVLegalizerInfo(*this));
auto *RBI = new RISCVRegisterBankInfo(*getRegisterInfo());
RegBankInfo.reset(RBI);
InstSelector.reset(createRISCVInstructionSelector(
*static_cast<const RISCVTargetMachine *>(&TM), *this, *RBI));
}
const CallLowering *RISCVSubtarget::getCallLowering() const {
return CallLoweringInfo.get();
}
InstructionSelector *RISCVSubtarget::getInstructionSelector() const {
return InstSelector.get();
}
const LegalizerInfo *RISCVSubtarget::getLegalizerInfo() const {
return Legalizer.get();
}
const RegisterBankInfo *RISCVSubtarget::getRegBankInfo() const {
return RegBankInfo.get();
}
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