include/llvm/CodeGen/GlobalISel/InstructionSelect.h

   1 //== llvm/CodeGen/GlobalISel/InstructionSelect.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 This file describes the interface of the MachineFunctionPass
   9 /// responsible for selecting (possibly generic) machine instructions to
  10 /// target-specific instructions.
  11 //===----------------------------------------------------------------------===//
  12
  13 #ifndef LLVM_CODEGEN_GLOBALISEL_INSTRUCTIONSELECT_H
  14 #define LLVM_CODEGEN_GLOBALISEL_INSTRUCTIONSELECT_H
  15
  16 #include "llvm/CodeGen/GlobalISel/InstructionSelector.h"
  17 #include "llvm/CodeGen/MachineFunctionPass.h"
  18
  19 namespace llvm {
  20 /// This pass is responsible for selecting generic machine instructions to
  21 /// target-specific instructions.  It relies on the InstructionSelector provided
  22 /// by the target.
  23 /// Selection is done by examining blocks in post-order, and instructions in
  24 /// reverse order.
  25 ///
  26 /// \post for all inst in MF: not isPreISelGenericOpcode(inst.opcode)
  27 class InstructionSelect : public MachineFunctionPass {
  28 public:
  29   static char ID;
  30   StringRef getPassName() const override { return "InstructionSelect"; }
  31
  32   void getAnalysisUsage(AnalysisUsage &AU) const override;
  33
  34   MachineFunctionProperties getRequiredProperties() const override {
  35     return MachineFunctionProperties()
  36         .set(MachineFunctionProperties::Property::IsSSA)
  37         .set(MachineFunctionProperties::Property::Legalized)
  38         .set(MachineFunctionProperties::Property::RegBankSelected);
  39   }
  40
  41   MachineFunctionProperties getSetProperties() const override {
  42     return MachineFunctionProperties().set(
  43         MachineFunctionProperties::Property::Selected);
  44   }
  45
  46   InstructionSelect();
  47
  48   bool runOnMachineFunction(MachineFunction &MF) override;
  49 };
  50 } // End namespace llvm.
  51
  52 #endif