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//===-- LanaiMCTargetDesc.cpp - Lanai Target Descriptions -----------------===//
//
// 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 provides Lanai specific target descriptions.
//
//===----------------------------------------------------------------------===//
#include "LanaiMCTargetDesc.h"
#include "LanaiInstPrinter.h"
#include "LanaiMCAsmInfo.h"
#include "TargetInfo/LanaiTargetInfo.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/MC/MCInst.h"
#include "llvm/MC/MCInstrAnalysis.h"
#include "llvm/MC/MCInstrInfo.h"
#include "llvm/MC/MCRegisterInfo.h"
#include "llvm/MC/MCStreamer.h"
#include "llvm/MC/MCSubtargetInfo.h"
#include "llvm/MC/TargetRegistry.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/TargetParser/Triple.h"
#include <cstdint>
#include <string>
#define GET_INSTRINFO_MC_DESC
#define ENABLE_INSTR_PREDICATE_VERIFIER
#include "LanaiGenInstrInfo.inc"
#define GET_SUBTARGETINFO_MC_DESC
#include "LanaiGenSubtargetInfo.inc"
#define GET_REGINFO_MC_DESC
#include "LanaiGenRegisterInfo.inc"
using namespace llvm;
static MCInstrInfo *createLanaiMCInstrInfo() {
MCInstrInfo *X = new MCInstrInfo();
InitLanaiMCInstrInfo(X);
return X;
}
static MCRegisterInfo *createLanaiMCRegisterInfo(const Triple & /*TT*/) {
MCRegisterInfo *X = new MCRegisterInfo();
InitLanaiMCRegisterInfo(X, Lanai::RCA, 0, 0, Lanai::PC);
return X;
}
static MCSubtargetInfo *
createLanaiMCSubtargetInfo(const Triple &TT, StringRef CPU, StringRef FS) {
std::string CPUName = std::string(CPU);
if (CPUName.empty())
CPUName = "generic";
return createLanaiMCSubtargetInfoImpl(TT, CPUName, /*TuneCPU*/ CPUName, FS);
}
static MCStreamer *createMCStreamer(const Triple &T, MCContext &Context,
std::unique_ptr<MCAsmBackend> &&MAB,
std::unique_ptr<MCObjectWriter> &&OW,
std::unique_ptr<MCCodeEmitter> &&Emitter,
bool RelaxAll) {
if (!T.isOSBinFormatELF())
llvm_unreachable("OS not supported");
return createELFStreamer(Context, std::move(MAB), std::move(OW),
std::move(Emitter), RelaxAll);
}
static MCInstPrinter *createLanaiMCInstPrinter(const Triple & /*T*/,
unsigned SyntaxVariant,
const MCAsmInfo &MAI,
const MCInstrInfo &MII,
const MCRegisterInfo &MRI) {
if (SyntaxVariant == 0)
return new LanaiInstPrinter(MAI, MII, MRI);
return nullptr;
}
static MCRelocationInfo *createLanaiElfRelocation(const Triple &TheTriple,
MCContext &Ctx) {
return createMCRelocationInfo(TheTriple, Ctx);
}
namespace {
class LanaiMCInstrAnalysis : public MCInstrAnalysis {
public:
explicit LanaiMCInstrAnalysis(const MCInstrInfo *Info)
: MCInstrAnalysis(Info) {}
bool evaluateBranch(const MCInst &Inst, uint64_t Addr, uint64_t Size,
uint64_t &Target) const override {
if (Inst.getNumOperands() == 0)
return false;
if (!isConditionalBranch(Inst) && !isUnconditionalBranch(Inst) &&
!isCall(Inst))
return false;
if (Info->get(Inst.getOpcode()).operands()[0].OperandType ==
MCOI::OPERAND_PCREL) {
int64_t Imm = Inst.getOperand(0).getImm();
Target = Addr + Size + Imm;
return true;
} else {
int64_t Imm = Inst.getOperand(0).getImm();
// Skip case where immediate is 0 as that occurs in file that isn't linked
// and the branch target inferred would be wrong.
if (Imm == 0)
return false;
Target = Imm;
return true;
}
}
};
} // end anonymous namespace
static MCInstrAnalysis *createLanaiInstrAnalysis(const MCInstrInfo *Info) {
return new LanaiMCInstrAnalysis(Info);
}
extern "C" LLVM_EXTERNAL_VISIBILITY void LLVMInitializeLanaiTargetMC() {
// Register the MC asm info.
RegisterMCAsmInfo<LanaiMCAsmInfo> X(getTheLanaiTarget());
// Register the MC instruction info.
TargetRegistry::RegisterMCInstrInfo(getTheLanaiTarget(),
createLanaiMCInstrInfo);
// Register the MC register info.
TargetRegistry::RegisterMCRegInfo(getTheLanaiTarget(),
createLanaiMCRegisterInfo);
// Register the MC subtarget info.
TargetRegistry::RegisterMCSubtargetInfo(getTheLanaiTarget(),
createLanaiMCSubtargetInfo);
// Register the MC code emitter
TargetRegistry::RegisterMCCodeEmitter(getTheLanaiTarget(),
createLanaiMCCodeEmitter);
// Register the ASM Backend
TargetRegistry::RegisterMCAsmBackend(getTheLanaiTarget(),
createLanaiAsmBackend);
// Register the MCInstPrinter.
TargetRegistry::RegisterMCInstPrinter(getTheLanaiTarget(),
createLanaiMCInstPrinter);
// Register the ELF streamer.
TargetRegistry::RegisterELFStreamer(getTheLanaiTarget(), createMCStreamer);
// Register the MC relocation info.
TargetRegistry::RegisterMCRelocationInfo(getTheLanaiTarget(),
createLanaiElfRelocation);
// Register the MC instruction analyzer.
TargetRegistry::RegisterMCInstrAnalysis(getTheLanaiTarget(),
createLanaiInstrAnalysis);
}
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