include/llvm/CodeGen/GlobalISel/Combiner.h

   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 //
   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 #include "llvm/CodeGen/MachineFunctionPass.h"
  19
  20 namespace llvm {
  21 class MachineRegisterInfo;
  22 class CombinerInfo;
  23 class GISelCSEInfo;
  24 class TargetPassConfig;
  25 class MachineFunction;
  26
  27 class Combiner {
  28 public:
  29   Combiner(CombinerInfo &CombinerInfo, const TargetPassConfig *TPC);
  30
  31   /// If CSEInfo is not null, then the Combiner will setup observer for
  32   /// CSEInfo and instantiate a CSEMIRBuilder. Pass nullptr if CSE is not
  33   /// needed.
  34   bool combineMachineInstrs(MachineFunction &MF, GISelCSEInfo *CSEInfo);
  35
  36 protected:
  37   CombinerInfo &CInfo;
  38
  39   MachineRegisterInfo *MRI = nullptr;
  40   const TargetPassConfig *TPC;
  41   std::unique_ptr<MachineIRBuilder> Builder;
  42 };
  43
  44 } // End namespace llvm.
  45
  46 #endif // LLVM_CODEGEN_GLOBALISEL_GICOMBINER_H