6024e5c395
clang 20.0.0 (based on r547379) from build 12806354. Bug: http://b/379133546 Test: N/A Change-Id: I2eb8938af55d809de674be63cb30cf27e801862b Upstream-Commit: ad834e67b1105d15ef907f6255d4c96e8e733f57
84 lines
2.8 KiB
C++
84 lines
2.8 KiB
C++
//== ----- llvm/CodeGen/GlobalISel/Combiner.h -------------------*- C++ -*-== //
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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/// \file
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/// This contains the base class for all Combiners generated by TableGen.
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/// Backends need to create class that inherits from "Combiner" and put all of
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/// the TableGen-erated code in there, as it implements the virtual functions.
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///
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_CODEGEN_GLOBALISEL_COMBINER_H
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#define LLVM_CODEGEN_GLOBALISEL_COMBINER_H
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#include "llvm/CodeGen/GlobalISel/CombinerInfo.h"
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#include "llvm/CodeGen/GlobalISel/GIMatchTableExecutor.h"
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#include "llvm/CodeGen/GlobalISel/GISelChangeObserver.h"
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#include "llvm/CodeGen/GlobalISel/MachineIRBuilder.h"
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namespace llvm {
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class MachineRegisterInfo;
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class GISelCSEInfo;
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class TargetPassConfig;
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class MachineFunction;
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class MachineIRBuilder;
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/// Combiner implementation. This is per-function, so passes need to recreate
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/// one of these each time they enter a new function.
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///
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/// TODO: Is it worth making this module-wide?
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class Combiner : public GIMatchTableExecutor {
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private:
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using WorkListTy = GISelWorkList<512>;
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class WorkListMaintainer;
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template <CombinerInfo::ObserverLevel Lvl> class WorkListMaintainerImpl;
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WorkListTy WorkList;
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// We have a little hack here where keep the owned pointers private, and only
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// expose a reference. This has two purposes:
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// - Avoid derived classes messing with those pointers.
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// - Keep the API consistent. CInfo, MF, MRI, etc. are all accessed as
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// references. Accessing Observer/B as pointers unnecessarily leaks
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// implementation details into derived classes.
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std::unique_ptr<MachineIRBuilder> Builder;
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std::unique_ptr<WorkListMaintainer> WLObserver;
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std::unique_ptr<GISelObserverWrapper> ObserverWrapper;
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bool HasSetupMF = false;
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static bool tryDCE(MachineInstr &MI, MachineRegisterInfo &MRI);
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public:
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/// If CSEInfo is not null, then the Combiner will use CSEInfo as the observer
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/// and also create a CSEMIRBuilder. Pass nullptr if CSE is not needed.
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Combiner(MachineFunction &MF, CombinerInfo &CInfo,
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const TargetPassConfig *TPC, GISelKnownBits *KB,
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GISelCSEInfo *CSEInfo = nullptr);
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virtual ~Combiner();
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virtual bool tryCombineAll(MachineInstr &I) const = 0;
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bool combineMachineInstrs();
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protected:
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CombinerInfo &CInfo;
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GISelChangeObserver &Observer;
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MachineIRBuilder &B;
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MachineFunction &MF;
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MachineRegisterInfo &MRI;
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GISelKnownBits *KB;
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const TargetPassConfig *TPC;
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GISelCSEInfo *CSEInfo;
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};
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} // End namespace llvm.
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#endif // LLVM_CODEGEN_GLOBALISEL_COMBINER_H
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