llvm::GVNPass Class Reference

The core GVN pass object. More...

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

Inheritance diagram for llvm::GVNPass:

Classes
struct	Expression
class	ValueTable
	This class holds the mapping between values and value numbers. More...

Public Member Functions
	GVNPass (GVNOptions Options={})
PreservedAnalyses	run (Function &F, FunctionAnalysisManager &AM)
	Run the pass over the function.
void	printPipeline (raw_ostream &OS, function_ref< StringRef(StringRef)> MapClassName2PassName)
void	markInstructionForDeletion (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
bool	isPREEnabled () const
bool	isLoadPREEnabled () const
bool	isLoadInLoopPREEnabled () const
bool	isLoadPRESplitBackedgeEnabled () const
bool	isMemDepEnabled () const
Public Member Functions inherited from llvm::PassInfoMixin< GVNPass >
void	printPipeline (raw_ostream &OS, function_ref< StringRef(StringRef)> MapClassName2PassName)

Friends
class	gvn::GVNLegacyPass
struct	DenseMapInfo< Expression >

Additional Inherited Members
Static Public Member Functions inherited from llvm::PassInfoMixin< 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 117 of file GVN.h.

Constructor & Destructor Documentation

GVNPass()

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

inline

Definition at line 123 of file GVN.h.

Member Function Documentation

getAliasAnalysis()

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

inline

Definition at line 139 of file GVN.h.

References llvm::GVNPass::ValueTable::getAliasAnalysis().

getDominatorTree()

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

inline

Definition at line 138 of file GVN.h.

Referenced by ConstructSSAForLoadSet().

getMemDep()

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

inline

Definition at line 140 of file GVN.h.

isLoadInLoopPREEnabled()

bool GVNPass::isLoadInLoopPREEnabled

(

)

const

Definition at line 810 of file GVN.cpp.

References llvm::GVNOptions::AllowLoadInLoopPRE, and GVNEnableLoadInLoopPRE.

isLoadPREEnabled()

bool GVNPass::isLoadPREEnabled

(

)

const

Definition at line 806 of file GVN.cpp.

References llvm::GVNOptions::AllowLoadPRE, and GVNEnableLoadPRE.

isLoadPRESplitBackedgeEnabled()

bool GVNPass::isLoadPRESplitBackedgeEnabled

(

)

const

Definition at line 814 of file GVN.cpp.

References llvm::GVNOptions::AllowLoadPRESplitBackedge, and GVNEnableSplitBackedgeInLoadPRE.

isMemDepEnabled()

bool GVNPass::isMemDepEnabled

(

)

const

Definition at line 819 of file GVN.cpp.

References llvm::GVNOptions::AllowMemDep, and GVNEnableMemDep.

Referenced by run().

isPREEnabled()

bool GVNPass::isPREEnabled

(

)

const

Definition at line 802 of file GVN.cpp.

References llvm::GVNOptions::AllowPRE, and GVNEnablePRE.

markInstructionForDeletion()

void llvm::GVNPass::markInstructionForDeletion ( Instruction *  I )

inline

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

Definition at line 133 of file GVN.h.

References llvm::GVNPass::ValueTable::erase(), I, and llvm::SmallVectorTemplateBase< T, bool >::push_back().

printPipeline()

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

Definition at line 850 of file GVN.cpp.

References llvm::GVNOptions::AllowLoadPRE, llvm::GVNOptions::AllowLoadPRESplitBackedge, llvm::GVNOptions::AllowMemDep, llvm::GVNOptions::AllowPRE, OS, and printPipeline().

Referenced by printPipeline().

run()

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

Run the pass over the function.

Definition at line 823 of file GVN.cpp.

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

Friends And Related Function Documentation

DenseMapInfo< Expression >

friend struct DenseMapInfo< Expression >

friend

Definition at line 218 of file GVN.h.

gvn::GVNLegacyPass

friend class gvn::GVNLegacyPass

friend

Definition at line 218 of file GVN.h.

Referenced by llvm::createGVNPass().

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

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