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//===-- Latency.h -----------------------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
///
/// \file
/// A BenchmarkRunner implementation to measure instruction latencies.
///
//===----------------------------------------------------------------------===//
#ifndef LLVM_TOOLS_LLVM_EXEGESIS_LATENCY_H
#define LLVM_TOOLS_LLVM_EXEGESIS_LATENCY_H
#include "BenchmarkRunner.h"
#include "MCInstrDescView.h"
namespace exegesis {
class LatencyBenchmarkRunner : public BenchmarkRunner {
public:
using BenchmarkRunner::BenchmarkRunner;
~LatencyBenchmarkRunner() override;
llvm::Expected<SnippetPrototype>
generatePrototype(unsigned Opcode) const override;
private:
llvm::Error isInfeasible(const llvm::MCInstrDesc &MCInstrDesc) const;
llvm::Expected<SnippetPrototype> generateSelfAliasingPrototype(
const Instruction &Instr,
const AliasingConfigurations &SelfAliasing) const;
llvm::Expected<SnippetPrototype> generateTwoInstructionPrototype(
const Instruction &Instr,
const AliasingConfigurations &SelfAliasing) const;
InstructionBenchmark::ModeE getMode() const override;
std::vector<BenchmarkMeasure>
runMeasurements(const ExecutableFunction &EF,
const unsigned NumRepetitions) const override;
};
} // namespace exegesis
#endif // LLVM_TOOLS_LLVM_EXEGESIS_LATENCY_H
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