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//===-- LlvmState.h ---------------------------------------------*- 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
/// A class to set up and access common LLVM objects.
///
//===----------------------------------------------------------------------===//
#ifndef LLVM_TOOLS_LLVM_EXEGESIS_LLVMSTATE_H
#define LLVM_TOOLS_LLVM_EXEGESIS_LLVMSTATE_H
#include "MCInstrDescView.h"
#include "RegisterAliasing.h"
#include "llvm/MC/MCAsmInfo.h"
#include "llvm/MC/MCInst.h"
#include "llvm/MC/MCInstrInfo.h"
#include "llvm/MC/MCRegisterInfo.h"
#include "llvm/MC/MCSubtargetInfo.h"
#include "llvm/Target/TargetMachine.h"
#include <memory>
#include <string>
static constexpr llvm::StringLiteral kNoRegister("%noreg");
namespace llvm {
namespace exegesis {
class ExegesisTarget;
struct PfmCountersInfo;
// An object to initialize LLVM and prepare objects needed to run the
// measurements.
class LLVMState {
public:
// Factory function.
// If `Triple` is empty, uses the host triple.
// If `CpuName` is empty, uses the host CPU.
// If `UseDummyPerfCounters` is set, does not query the kernel
// for event counts.
// `UseDummyPerfCounters` and `Features` are intended for tests.
static Expected<LLVMState> Create(std::string TripleName, std::string CpuName,
StringRef Features = "",
bool UseDummyPerfCounters = false);
const TargetMachine &getTargetMachine() const { return *TheTargetMachine; }
std::unique_ptr<LLVMTargetMachine> createTargetMachine() const;
const ExegesisTarget &getExegesisTarget() const { return *TheExegesisTarget; }
bool canAssemble(const MCInst &mc_inst) const;
// For convenience:
const MCInstrInfo &getInstrInfo() const {
return *TheTargetMachine->getMCInstrInfo();
}
const MCRegisterInfo &getRegInfo() const {
return *TheTargetMachine->getMCRegisterInfo();
}
const MCSubtargetInfo &getSubtargetInfo() const {
return *TheTargetMachine->getMCSubtargetInfo();
}
const RegisterAliasingTrackerCache &getRATC() const { return *RATC; }
const InstructionsCache &getIC() const { return *IC; }
const PfmCountersInfo &getPfmCounters() const { return *PfmCounters; }
const DenseMap<StringRef, unsigned> &getOpcodeNameToOpcodeIdxMapping() const {
assert(OpcodeNameToOpcodeIdxMapping);
return *OpcodeNameToOpcodeIdxMapping;
};
const DenseMap<StringRef, unsigned> &getRegNameToRegNoMapping() const {
assert(RegNameToRegNoMapping);
return *RegNameToRegNoMapping;
}
private:
std::unique_ptr<const DenseMap<StringRef, unsigned>>
createOpcodeNameToOpcodeIdxMapping() const;
std::unique_ptr<const DenseMap<StringRef, unsigned>>
createRegNameToRegNoMapping() const;
LLVMState(std::unique_ptr<const TargetMachine> TM, const ExegesisTarget *ET,
const PfmCountersInfo *PCI);
const ExegesisTarget *TheExegesisTarget;
std::unique_ptr<const TargetMachine> TheTargetMachine;
std::unique_ptr<const RegisterAliasingTrackerCache> RATC;
std::unique_ptr<const InstructionsCache> IC;
const PfmCountersInfo *PfmCounters;
std::unique_ptr<const DenseMap<StringRef, unsigned>>
OpcodeNameToOpcodeIdxMapping;
std::unique_ptr<const DenseMap<StringRef, unsigned>> RegNameToRegNoMapping;
};
} // namespace exegesis
} // namespace llvm
#endif // LLVM_TOOLS_LLVM_EXEGESIS_LLVMSTATE_H
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