include/llvm/MCA/Stages/InstructionTables.h

   1 //===--------------------- InstructionTables.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 /// \file
   9 ///
  10 /// This file implements a custom stage to generate instruction tables.
  11 /// See the description of command-line flag -instruction-tables in
  12 /// docs/CommandGuide/lvm-mca.rst
  13 ///
  14 //===----------------------------------------------------------------------===//
  15
  16 #ifndef LLVM_MCA_INSTRUCTIONTABLES_H
  17 #define LLVM_MCA_INSTRUCTIONTABLES_H
  18
  19 #include "llvm/ADT/SmallVector.h"
  20 #include "llvm/MC/MCSchedule.h"
  21 #include "llvm/MCA/HardwareUnits/Scheduler.h"
  22 #include "llvm/MCA/Stages/Stage.h"
  23 #include "llvm/MCA/Support.h"
  24
  25 namespace llvm {
  26 namespace mca {
  27
  28 class InstructionTables final : public Stage {
  29   const MCSchedModel &SM;
  30   SmallVector<std::pair<ResourceRef, ResourceCycles>, 4> UsedResources;
  31   SmallVector<uint64_t, 8> Masks;
  32
  33 public:
  34   InstructionTables(const MCSchedModel &Model)
  35       : Stage(), SM(Model), Masks(Model.getNumProcResourceKinds()) {
  36     computeProcResourceMasks(Model, Masks);
  37   }
  38
  39   bool hasWorkToComplete() const override { return false; }
  40   Error execute(InstRef &IR) override;
  41 };
  42 } // namespace mca
  43 } // namespace llvm
  44
  45 #endif // LLVM_MCA_INSTRUCTIONTABLES_H