LLVM  9.0.0svn
Legalizer.h
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1 //== llvm/CodeGen/GlobalISel/Legalizer.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 A pass to convert the target-illegal operations created by IR -> MIR
10 /// translation into ones the target expects to be able to select. This may
11 /// occur in multiple phases, for example G_ADD <2 x i8> -> G_ADD <2 x i16> ->
12 /// G_ADD <4 x i16>.
13 ///
14 /// The LegalizeHelper class is where most of the work happens, and is designed
15 /// to be callable from other passes that find themselves with an illegal
16 /// instruction.
17 //
18 //===----------------------------------------------------------------------===//
19 
20 #ifndef LLVM_CODEGEN_GLOBALISEL_LEGALIZEMACHINEIRPASS_H
21 #define LLVM_CODEGEN_GLOBALISEL_LEGALIZEMACHINEIRPASS_H
22 
25 
26 namespace llvm {
27 
28 class MachineRegisterInfo;
29 
31 public:
32  static char ID;
33 
34 private:
35 
36  /// Initialize the field members using \p MF.
37  void init(MachineFunction &MF);
38 
39 public:
40  // Ctor, nothing fancy.
41  Legalizer();
42 
43  StringRef getPassName() const override { return "Legalizer"; }
44 
45  void getAnalysisUsage(AnalysisUsage &AU) const override;
46 
50  }
51 
55  }
56 
60  }
61 
63  const TargetInstrInfo &TII);
64 
65  bool runOnMachineFunction(MachineFunction &MF) override;
66 };
67 } // End namespace llvm.
68 
69 #endif
StringRef getPassName() const override
getPassName - Return a nice clean name for a pass.
Definition: Legalizer.h:43
This class represents lattice values for constants.
Definition: AllocatorList.h:23
MachineFunctionPass - This class adapts the FunctionPass interface to allow convenient creation of pa...
const HexagonInstrInfo * TII
TargetInstrInfo - Interface to description of machine instruction set.
unsigned const MachineRegisterInfo * MRI
Represent the analysis usage information of a pass.
bool runOnMachineFunction(MachineFunction &MF) override
runOnMachineFunction - This method must be overloaded to perform the desired machine code transformat...
Definition: Legalizer.cpp:142
MachineFunctionProperties getSetProperties() const override
Definition: Legalizer.h:52
This file declares the MachineIRBuilder class.
static char ID
Definition: Legalizer.h:32
MachineRegisterInfo - Keep track of information for virtual and physical registers, including vreg register classes, use/def chains for registers, etc.
MachineFunctionProperties & set(Property P)
Representation of each machine instruction.
Definition: MachineInstr.h:63
void getAnalysisUsage(AnalysisUsage &AU) const override
getAnalysisUsage - This function should be overriden by passes that need analysis information to do t...
Definition: Legalizer.cpp:55
bool combineExtracts(MachineInstr &MI, MachineRegisterInfo &MRI, const TargetInstrInfo &TII)
MachineFunctionProperties getRequiredProperties() const override
Definition: Legalizer.h:47
IRTranslator LLVM IR MI
StringRef - Represent a constant reference to a string, i.e.
Definition: StringRef.h:48
MachineFunctionProperties getClearedProperties() const override
Definition: Legalizer.h:57
Properties which a MachineFunction may have at a given point in time.