LLVM: llvm::GVNPass Class Reference

LLVM 24.0.0git

The core GVN pass object. More...

#include "llvm/Transforms/Scalar/GVN.h"

Inheritance diagram for llvm::GVNPass:

Classes
struct	AvailableValue
	Represents a particular available value that we know how to materialize. More...
struct	AvailableValueInBlock
	Represents an AvailableValue which can be rematerialized at the end of the associated BasicBlock. More...
struct	Expression
class	ValueTable
	This class holds the mapping between values and value numbers. More...

Public Member Functions
	GVNPass (GVNOptions Options={})
LLVM_ABI PreservedAnalyses	run (Function &F, FunctionAnalysisManager &AM)
	Run the pass over the function.
LLVM_ABI void	printPipeline (raw_ostream &OS, function_ref< StringRef(StringRef)> MapClassName2PassName)
LLVM_ABI void	salvageAndRemoveInstruction (Instruction *I)
	This removes the specified instruction from our various maps and marks it for deletion.
DominatorTree &	getDominatorTree () const
AAResults *	getAliasAnalysis () const
MemoryDependenceResults &	getMemDep () const
LLVM_ABI bool	isScalarPREEnabled () const
LLVM_ABI bool	isLoadPREEnabled () const
LLVM_ABI bool	isLoadInLoopPREEnabled () const
LLVM_ABI bool	isLoadPRESplitBackedgeEnabled () const
LLVM_ABI bool	isMemDepEnabled () const
LLVM_ABI bool	isMemorySSAEnabled () const
Public Member Functions inherited from llvm::PassInfoMixin< GVNPass >
void	printPipeline (raw_ostream &OS, function_ref< StringRef(StringRef)> MapClassName2PassName)

Friends
class	GVNLegacyPass
struct	DenseMapInfo< Expression >

Additional Inherited Members
Static Public Member Functions inherited from llvm::OptionalPassInfoMixin< GVNPass >
static bool	isRequired ()
Static Public Member Functions inherited from llvm::PassInfoMixin< GVNPass >
static bool	isRequired ()
Static Public Member Functions inherited from llvm::detail::InfoMixin< GVNPass >
static StringRef	name ()
	Gets the name of the pass we are mixed into.

Detailed Description

The core GVN pass object.

FIXME: We should have a good summary of the GVN algorithm implemented by this particular pass here.

Definition at line 123 of file GVN.h.

Constructor & Destructor Documentation

◆ GVNPass()

llvm::GVNPass::GVNPass ( GVNOptions Options = {} )

inline

Definition at line 131 of file GVN.h.

Referenced by llvm::GVNPass::ValueTable::operator=(), and llvm::GVNPass::ValueTable::phiTranslate().

Member Function Documentation

◆ getAliasAnalysis()

AAResults * llvm::GVNPass::getAliasAnalysis ( ) const

inline

Definition at line 145 of file GVN.h.

◆ getDominatorTree()

DominatorTree & llvm::GVNPass::getDominatorTree ( ) const

inline

Definition at line 144 of file GVN.h.

Referenced by constructSSAForLoadSet().

◆ getMemDep()

MemoryDependenceResults & llvm::GVNPass::getMemDep ( ) const

inline

Definition at line 146 of file GVN.h.

◆ isLoadInLoopPREEnabled()

bool GVNPass::isLoadInLoopPREEnabled ( ) const

Definition at line 862 of file GVN.cpp.

References GVNEnableLoadInLoopPRE.

◆ isLoadPREEnabled()

bool GVNPass::isLoadPREEnabled ( ) const

Definition at line 858 of file GVN.cpp.

References GVNEnableLoadPRE.

◆ isLoadPRESplitBackedgeEnabled()

bool GVNPass::isLoadPRESplitBackedgeEnabled ( ) const

Definition at line 866 of file GVN.cpp.

References GVNEnableSplitBackedgeInLoadPRE.

◆ isMemDepEnabled()

bool GVNPass::isMemDepEnabled ( ) const

Definition at line 871 of file GVN.cpp.

References GVNEnableMemDep.

Referenced by run().

◆ isMemorySSAEnabled()

bool GVNPass::isMemorySSAEnabled ( ) const

Definition at line 875 of file GVN.cpp.

References GVNEnableMemorySSA.

Referenced by run().

◆ isScalarPREEnabled()

bool GVNPass::isScalarPREEnabled ( ) const

Definition at line 854 of file GVN.cpp.

References GVNEnableScalarPRE.

◆ printPipeline()

void GVNPass::printPipeline	(	raw_ostream &	OS,
		function_ref< StringRef(StringRef)>	MapClassName2PassName )

Definition at line 911 of file GVN.cpp.

References printPipeline().

Referenced by printPipeline().

◆ run()

PreservedAnalyses GVNPass::run	(	Function &	F,
		FunctionAnalysisManager &	AM )

Run the pass over the function.

Definition at line 879 of file GVN.cpp.

References llvm::PreservedAnalyses::all(), assert(), Changed, F, llvm::AnalysisManager< IRUnitT, ExtraArgTs >::getCachedResult(), llvm::AnalysisManager< IRUnitT, ExtraArgTs >::getResult(), isMemDepEnabled(), isMemorySSAEnabled(), and llvm::PreservedAnalyses::preserve().

◆ salvageAndRemoveInstruction()

void GVNPass::salvageAndRemoveInstruction ( Instruction * I )

This removes the specified instruction from our various maps and marks it for deletion.

Definition at line 931 of file GVN.cpp.

References I, llvm::salvageDebugInfo(), and llvm::salvageKnowledge().

◆ DenseMapInfo< Expression >

friend struct DenseMapInfo< Expression >

friend

Definition at line 245 of file GVN.h.

References GVNLegacyPass.

◆ GVNLegacyPass

friend class GVNLegacyPass

friend

Definition at line 245 of file GVN.h.

Referenced by llvm::createGVNPass(), llvm::createGVNPass(), and DenseMapInfo< Expression >.

The documentation for this class was generated from the following files:

include/llvm/Transforms/Scalar/GVN.h
lib/Transforms/Scalar/GVN.cpp