InstructionSelect.h revision 311116 
1//== llvm/CodeGen/GlobalISel/InstructionSelect.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/// \file This file describes the interface of the MachineFunctionPass
10/// responsible for selecting (possibly generic) machine instructions to
11/// target-specific instructions.
12//===----------------------------------------------------------------------===//
13
14#ifndef LLVM_CODEGEN_GLOBALISEL_INSTRUCTIONSELECT_H
15#define LLVM_CODEGEN_GLOBALISEL_INSTRUCTIONSELECT_H
16
17#include "llvm/CodeGen/GlobalISel/InstructionSelector.h"
18#include "llvm/CodeGen/MachineFunctionPass.h"
19
20namespace llvm {
21/// This pass is responsible for selecting generic machine instructions to
22/// target-specific instructions.  It relies on the InstructionSelector provided
23/// by the target.
24/// Selection is done by examining blocks in post-order, and instructions in
25/// reverse order.
26///
27/// \post for all inst in MF: not isPreISelGenericOpcode(inst.opcode)
28class InstructionSelect : public MachineFunctionPass {
29public:
30  static char ID;
31  StringRef getPassName() const override { return "InstructionSelect"; }
32
33  void getAnalysisUsage(AnalysisUsage &AU) const override;
34
35  MachineFunctionProperties getRequiredProperties() const override {
36    return MachineFunctionProperties()
37        .set(MachineFunctionProperties::Property::IsSSA)
38        .set(MachineFunctionProperties::Property::Legalized)
39        .set(MachineFunctionProperties::Property::RegBankSelected);
40  }
41
42  MachineFunctionProperties getSetProperties() const override {
43    return MachineFunctionProperties().set(
44        MachineFunctionProperties::Property::Selected);
45  }
46
47  InstructionSelect();
48
49  bool runOnMachineFunction(MachineFunction &MF) override;
50};
51} // End namespace llvm.
52
53#endif
54