| //===- llvm/CodeGen/GlobalISel/CombinerInfo.h ------*- C++ -*-===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| /// Interface for Targets to specify which operations are combined how and when. |
| /// |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef LLVM_CODEGEN_GLOBALISEL_COMBINER_INFO_H |
| #define LLVM_CODEGEN_GLOBALISEL_COMBINER_INFO_H |
| |
| #include <cassert> |
| namespace llvm { |
| |
| class GISelChangeObserver; |
| class LegalizerInfo; |
| class MachineInstr; |
| class MachineIRBuilder; |
| class MachineRegisterInfo; |
| |
| // Contains information relevant to enabling/disabling various combines for a |
| // pass. |
| class CombinerInfo { |
| public: |
| CombinerInfo(bool AllowIllegalOps, bool ShouldLegalizeIllegal, |
| LegalizerInfo *LInfo) |
| : IllegalOpsAllowed(AllowIllegalOps), |
| LegalizeIllegalOps(ShouldLegalizeIllegal), LInfo(LInfo) { |
| assert(((AllowIllegalOps || !LegalizeIllegalOps) || LInfo) && |
| "Expecting legalizerInfo when illegalops not allowed"); |
| } |
| virtual ~CombinerInfo() = default; |
| /// If \p IllegalOpsAllowed is false, the CombinerHelper will make use of |
| /// the legalizerInfo to check for legality before each transformation. |
| bool IllegalOpsAllowed; // TODO: Make use of this. |
| |
| /// If \p LegalizeIllegalOps is true, the Combiner will also legalize the |
| /// illegal ops that are created. |
| bool LegalizeIllegalOps; // TODO: Make use of this. |
| const LegalizerInfo *LInfo; |
| virtual bool combine(GISelChangeObserver &Observer, MachineInstr &MI, |
| MachineIRBuilder &B) const = 0; |
| }; |
| } // namespace llvm |
| |
| #endif |