tools/llvm-exegesis/lib/SchedClassResolution.h

   1 //===-- SchedClassResolution.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 /// Resolution of MCInst sched class into expanded form for further analysis.
  11 ///
  12 //===----------------------------------------------------------------------===//
  13
  14 #ifndef LLVM_TOOLS_LLVM_EXEGESIS_SCHEDCLASSRESOLUTION_H
  15 #define LLVM_TOOLS_LLVM_EXEGESIS_SCHEDCLASSRESOLUTION_H
  16
  17 #include "BenchmarkResult.h"
  18 #include "llvm/MC/MCContext.h"
  19 #include "llvm/MC/MCDisassembler/MCDisassembler.h"
  20 #include "llvm/MC/MCInstPrinter.h"
  21 #include "llvm/MC/MCInstrInfo.h"
  22 #include "llvm/MC/MCObjectFileInfo.h"
  23 #include "llvm/MC/MCSubtargetInfo.h"
  24 #include "llvm/Support/Error.h"
  25 #include "llvm/Support/TargetRegistry.h"
  26 #include "llvm/Support/raw_ostream.h"
  27
  28 namespace llvm {
  29 namespace exegesis {
  30
  31 // Computes the idealized ProcRes Unit pressure. This is the expected
  32 // distribution if the CPU scheduler can distribute the load as evenly as
  33 // possible.
  34 std::vector<std::pair<uint16_t, float>> computeIdealizedProcResPressure(
  35     const llvm::MCSchedModel &SM,
  36     llvm::SmallVector<llvm::MCWriteProcResEntry, 8> WPRS);
  37
  38 // An llvm::MCSchedClassDesc augmented with some additional data.
  39 struct ResolvedSchedClass {
  40   ResolvedSchedClass(const llvm::MCSubtargetInfo &STI,
  41                      unsigned ResolvedSchedClassId, bool WasVariant);
  42
  43   static std::pair<unsigned /*SchedClassId*/, bool /*WasVariant*/>
  44   resolveSchedClassId(const llvm::MCSubtargetInfo &SubtargetInfo,
  45                       const llvm::MCInstrInfo &InstrInfo,
  46                       const llvm::MCInst &MCI);
  47
  48   std::vector<BenchmarkMeasure>
  49   getAsPoint(InstructionBenchmark::ModeE Mode, const llvm::MCSubtargetInfo &STI,
  50              ArrayRef<PerInstructionStats> Representative) const;
  51
  52   const unsigned SchedClassId;
  53   const llvm::MCSchedClassDesc *const SCDesc;
  54   const bool WasVariant; // Whether the original class was variant.
  55   const llvm::SmallVector<llvm::MCWriteProcResEntry, 8>
  56       NonRedundantWriteProcRes;
  57   const std::vector<std::pair<uint16_t, float>> IdealizedProcResPressure;
  58 };
  59
  60 } // namespace exegesis
  61 } // namespace llvm
  62
  63 #endif // LLVM_TOOLS_LLVM_EXEGESIS_SCHEDCLASSRESOLUTION_H