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//===-- BenchmarkRunner.h ---------------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
///
/// \file
/// Defines the abstract BenchmarkRunner class for measuring a certain execution
/// property of instructions (e.g. latency).
///
//===----------------------------------------------------------------------===//
#ifndef LLVM_TOOLS_LLVM_EXEGESIS_BENCHMARKRUNNER_H
#define LLVM_TOOLS_LLVM_EXEGESIS_BENCHMARKRUNNER_H
#include "Assembler.h"
#include "BenchmarkResult.h"
#include "LlvmState.h"
#include "RegisterAliasing.h"
#include "llvm/MC/MCInst.h"
#include "llvm/Support/Error.h"
#include <vector>
namespace exegesis {
// Common code for all benchmark modes.
class BenchmarkRunner {
public:
explicit BenchmarkRunner(const LLVMState &State);
// Subtargets can disable running benchmarks for some instructions by
// returning an error here.
class InstructionFilter {
public:
virtual ~InstructionFilter();
virtual llvm::Error shouldRun(const LLVMState &State,
unsigned Opcode) const {
return llvm::ErrorSuccess();
}
};
virtual ~BenchmarkRunner();
InstructionBenchmark run(unsigned Opcode, const InstructionFilter &Filter,
unsigned NumRepetitions);
protected:
const LLVMState &State;
const llvm::MCInstrInfo &MCInstrInfo;
const llvm::MCRegisterInfo &MCRegisterInfo;
private:
virtual const char *getDisplayName() const = 0;
virtual llvm::Expected<std::vector<llvm::MCInst>>
createSnippet(RegisterAliasingTrackerCache &RATC, unsigned Opcode,
llvm::raw_ostream &Debug) const = 0;
virtual std::vector<BenchmarkMeasure>
runMeasurements(const ExecutableFunction &EF,
const unsigned NumRepetitions) const = 0;
llvm::Expected<std::string>
writeObjectFile(llvm::ArrayRef<llvm::MCInst> Code) const;
RegisterAliasingTrackerCache RATC;
};
} // namespace exegesis
#endif // LLVM_TOOLS_LLVM_EXEGESIS_BENCHMARKRUNNER_H
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