1 //== ----- llvm/CodeGen/GlobalISel/Combiner.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 /// This contains common code to drive combines. Combiner Passes will need to
10 /// setup a CombinerInfo and call combineMachineFunction.
11 ///
12 //===----------------------------------------------------------------------===//
13 
14 #ifndef LLVM_CODEGEN_GLOBALISEL_COMBINER_H
15 #define LLVM_CODEGEN_GLOBALISEL_COMBINER_H
16 
17 #include "llvm/CodeGen/GlobalISel/MachineIRBuilder.h"
18 
19 namespace llvm {
20 class MachineRegisterInfo;
21 class CombinerInfo;
22 class GISelCSEInfo;
23 class TargetPassConfig;
24 class MachineFunction;
25 
26 class Combiner {
27 public:
28   Combiner(CombinerInfo &CombinerInfo, const TargetPassConfig *TPC);
29 
30   /// If CSEInfo is not null, then the Combiner will setup observer for
31   /// CSEInfo and instantiate a CSEMIRBuilder. Pass nullptr if CSE is not
32   /// needed.
33   bool combineMachineInstrs(MachineFunction &MF, GISelCSEInfo *CSEInfo);
34 
35 protected:
36   CombinerInfo &CInfo;
37 
38   MachineRegisterInfo *MRI = nullptr;
39   const TargetPassConfig *TPC;
40   std::unique_ptr<MachineIRBuilder> Builder;
41 };
42 
43 } // End namespace llvm.
44 
45 #endif // LLVM_CODEGEN_GLOBALISEL_COMBINER_H
46