tools/llvm-exegesis/lib/Latency.h

   1 //===-- Latency.h -----------------------------------------------*- C++ -*-===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is distributed under the University of Illinois Open Source
   6 // License. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9 ///
  10 /// \file
  11 /// A BenchmarkRunner implementation to measure instruction latencies.
  12 ///
  13 //===----------------------------------------------------------------------===//
  14
  15 #ifndef LLVM_TOOLS_LLVM_EXEGESIS_LATENCY_H
  16 #define LLVM_TOOLS_LLVM_EXEGESIS_LATENCY_H
  17
  18 #include "BenchmarkRunner.h"
  19 #include "MCInstrDescView.h"
  20 #include "SnippetGenerator.h"
  21
  22 namespace llvm {
  23 namespace exegesis {
  24
  25 class LatencySnippetGenerator : public SnippetGenerator {
  26 public:
  27   LatencySnippetGenerator(const LLVMState &State) : SnippetGenerator(State) {}
  28   ~LatencySnippetGenerator() override;
  29
  30   llvm::Expected<std::vector<CodeTemplate>>
  31   generateCodeTemplates(const Instruction &Instr) const override;
  32 };
  33
  34 class LatencyBenchmarkRunner : public BenchmarkRunner {
  35 public:
  36   LatencyBenchmarkRunner(const LLVMState &State)
  37       : BenchmarkRunner(State, InstructionBenchmark::Latency) {}
  38   ~LatencyBenchmarkRunner() override;
  39
  40 private:
  41   llvm::Expected<std::vector<BenchmarkMeasure>>
  42   runMeasurements(const FunctionExecutor &Executor) const override;
  43
  44   virtual const char *getCounterName() const;
  45 };
  46 } // namespace exegesis
  47 } // namespace llvm
  48
  49 #endif // LLVM_TOOLS_LLVM_EXEGESIS_LATENCY_H