tools/llvm-exegesis/lib/Latency.h

   1 //===-- Latency.h -----------------------------------------------*- C++ -*-===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8 ///
   9 /// \file
  10 /// A BenchmarkRunner implementation to measure instruction latencies.
  11 ///
  12 //===----------------------------------------------------------------------===//
  13
  14 #ifndef LLVM_TOOLS_LLVM_EXEGESIS_LATENCY_H
  15 #define LLVM_TOOLS_LLVM_EXEGESIS_LATENCY_H
  16
  17 #include "BenchmarkRunner.h"
  18 #include "MCInstrDescView.h"
  19 #include "SnippetGenerator.h"
  20
  21 namespace llvm {
  22 namespace exegesis {
  23
  24 class LatencySnippetGenerator : public SnippetGenerator {
  25 public:
  26   LatencySnippetGenerator(const LLVMState &State) : SnippetGenerator(State) {}
  27   ~LatencySnippetGenerator() override;
  28
  29   llvm::Expected<std::vector<CodeTemplate>>
  30   generateCodeTemplates(const Instruction &Instr) const override;
  31 };
  32
  33 class LatencyBenchmarkRunner : public BenchmarkRunner {
  34 public:
  35   LatencyBenchmarkRunner(const LLVMState &State,
  36                          InstructionBenchmark::ModeE Mode);
  37   ~LatencyBenchmarkRunner() override;
  38
  39 private:
  40   llvm::Expected<std::vector<BenchmarkMeasure>>
  41   runMeasurements(const FunctionExecutor &Executor) const override;
  42 };
  43 } // namespace exegesis
  44 } // namespace llvm
  45
  46 #endif // LLVM_TOOLS_LLVM_EXEGESIS_LATENCY_H