1//== llvm/CodeGen/GlobalISel/LegalizePass.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 A pass to convert the target-illegal operations created by IR -> MIR
11/// translation into ones the target expects to be able to select. This may
12/// occur in multiple phases, for example G_ADD <2 x i8> -> G_ADD <2 x i16> ->
13/// G_ADD <4 x i16>.
14///
15/// The LegalizeHelper class is where most of the work happens, and is designed
16/// to be callable from other passes that find themselves with an illegal
17/// instruction.
18//
19//===----------------------------------------------------------------------===//
20
21#ifndef LLVM_CODEGEN_GLOBALISEL_LEGALIZEMACHINEIRPASS_H
22#define LLVM_CODEGEN_GLOBALISEL_LEGALIZEMACHINEIRPASS_H
23
24#include "llvm/CodeGen/GlobalISel/MachineIRBuilder.h"
25#include "llvm/CodeGen/MachineFunctionPass.h"
26
27namespace llvm {
28
29class MachineRegisterInfo;
30
31class Legalizer : public MachineFunctionPass {
32public:
33  static char ID;
34
35private:
36
37  /// Initialize the field members using \p MF.
38  void init(MachineFunction &MF);
39
40public:
41  // Ctor, nothing fancy.
42  Legalizer();
43
44  StringRef getPassName() const override { return "Legalizer"; }
45
46  void getAnalysisUsage(AnalysisUsage &AU) const override;
47
48  MachineFunctionProperties getRequiredProperties() const override {
49    return MachineFunctionProperties().set(
50        MachineFunctionProperties::Property::IsSSA);
51  }
52
53  MachineFunctionProperties getSetProperties() const override {
54    return MachineFunctionProperties().set(
55        MachineFunctionProperties::Property::Legalized);
56  }
57
58  bool combineExtracts(MachineInstr &MI, MachineRegisterInfo &MRI,
59                       const TargetInstrInfo &TII);
60
61  bool combineMerges(MachineInstr &MI, MachineRegisterInfo &MRI,
62                     const TargetInstrInfo &TII);
63
64  bool runOnMachineFunction(MachineFunction &MF) override;
65};
66} // End namespace llvm.
67
68#endif
69