LLVM
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include
llvm
CodeGen
GlobalISel
Combiner.h
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//== ----- 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
CombinerInfo.h
Option class for Targets to specify which operations are combined how and when.
GIMatchTableExecutor.h
GISelChangeObserver.h
This contains common code to allow clients to notify changes to machine instr.
MI
IRTranslator LLVM IR MI
Definition:
IRTranslator.cpp:113
I
#define I(x, y, z)
Definition:
MD5.cpp:58
MachineIRBuilder.h
This file declares the MachineIRBuilder class.
llvm::Combiner::WorkListMaintainer
This class acts as the glue that joins the CombinerHelper to the overall Combine algorithm.
Definition:
Combiner.cpp:52
llvm::Combiner
Combiner implementation.
Definition:
Combiner.h:34
llvm::Combiner::CSEInfo
GISelCSEInfo * CSEInfo
Definition:
Combiner.h:78
llvm::Combiner::combineMachineInstrs
bool combineMachineInstrs()
Definition:
Combiner.cpp:255
llvm::Combiner::MRI
MachineRegisterInfo & MRI
Definition:
Combiner.h:74
llvm::Combiner::TPC
const TargetPassConfig * TPC
Definition:
Combiner.h:77
llvm::Combiner::~Combiner
virtual ~Combiner()
llvm::Combiner::B
MachineIRBuilder & B
Definition:
Combiner.h:72
llvm::Combiner::KB
GISelKnownBits * KB
Definition:
Combiner.h:75
llvm::Combiner::MF
MachineFunction & MF
Definition:
Combiner.h:73
llvm::Combiner::CInfo
CombinerInfo & CInfo
Definition:
Combiner.h:70
llvm::Combiner::Observer
GISelChangeObserver & Observer
Definition:
Combiner.h:71
llvm::Combiner::tryCombineAll
virtual bool tryCombineAll(MachineInstr &I) const =0
llvm::GIMatchTableExecutor
Provides the logic to execute GlobalISel match tables, which are used by the instruction selector and...
Definition:
GIMatchTableExecutor.h:585
llvm::GISelCSEInfo
The CSE Analysis object.
Definition:
CSEInfo.h:69
llvm::GISelChangeObserver
Abstract class that contains various methods for clients to notify about changes.
Definition:
GISelChangeObserver.h:29
llvm::GISelKnownBits
Definition:
GISelKnownBits.h:29
llvm::GISelWorkList< 512 >
llvm::MachineFunction
Definition:
MachineFunction.h:257
llvm::MachineIRBuilder
Helper class to build MachineInstr.
Definition:
MachineIRBuilder.h:224
llvm::MachineInstr
Representation of each machine instruction.
Definition:
MachineInstr.h:69
llvm::MachineRegisterInfo
MachineRegisterInfo - Keep track of information for virtual and physical registers,...
Definition:
MachineRegisterInfo.h:51
llvm::TargetPassConfig
Target-Independent Code Generator Pass Configuration Options.
Definition:
TargetPassConfig.h:85
llvm
This is an optimization pass for GlobalISel generic memory operations.
Definition:
AddressRanges.h:18
llvm::CombinerInfo
Definition:
CombinerInfo.h:24
Generated on Mon Oct 14 2024 13:23:54 for LLVM by
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