llvm::GVNPass::ValueTable Class Reference

This class holds the mapping between values and value numbers. More...

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

Public Member Functions
	ValueTable ()
	ValueTable (const ValueTable &Arg)
	ValueTable (ValueTable &&Arg)
	~ValueTable ()
ValueTable &	operator= (const ValueTable &Arg)
uint32_t	lookupOrAdd (Value *V)
	lookup_or_add - Returns the value number for the specified value, assigning it a new number if it did not have one before.
uint32_t	lookup (Value *V, bool Verify=true) const
	Returns the value number of the specified value.
uint32_t	lookupOrAddCmp (unsigned Opcode, CmpInst::Predicate Pred, Value *LHS, Value *RHS)
	Returns the value number of the given comparison, assigning it a new number if it did not have one before.
uint32_t	phiTranslate (const BasicBlock *BB, const BasicBlock *PhiBlock, uint32_t Num, GVNPass &Gvn)
	Wrap phiTranslateImpl to provide caching functionality.
void	eraseTranslateCacheEntry (uint32_t Num, const BasicBlock &CurrBlock)
	Erase stale entry from phiTranslate cache so phiTranslate can be computed again.
bool	exists (Value *V) const
	Returns true if a value number exists for the specified value.
void	add (Value *V, uint32_t num)
	add - Insert a value into the table with a specified value number.
void	clear ()
	Remove all entries from the ValueTable.
void	erase (Value *v)
	Remove a value from the value numbering.
void	setAliasAnalysis (AAResults *A)
AAResults *	getAliasAnalysis () const
void	setMemDep (MemoryDependenceResults *M)
void	setDomTree (DominatorTree *D)
uint32_t	getNextUnusedValueNumber ()
void	verifyRemoved (const Value *) const
	verifyRemoved - Verify that the value is removed from all internal data structures.

Detailed Description

This class holds the mapping between values and value numbers.

It is used as an efficient mechanism to determine the expression-wise equivalence of two values.

Definition at line 151 of file GVN.h.

Constructor & Destructor Documentation

ValueTable() [1/3]

GVNPass::ValueTable::ValueTable ( )

default

ValueTable() [2/3]

GVNPass::ValueTable::ValueTable ( const ValueTable &  Arg )

default

ValueTable() [3/3]

GVNPass::ValueTable::ValueTable ( ValueTable &&  Arg )

default

~ValueTable()

GVNPass::ValueTable::~ValueTable ( )

default

Member Function Documentation

add()

void GVNPass::ValueTable::add	(	Value *	V,
		uint32_t	num
	)

add - Insert a value into the table with a specified value number.

Definition at line 471 of file GVN.cpp.

References llvm::SmallVectorImpl< T >::insert().

clear()

void GVNPass::ValueTable::clear

(

)

Remove all entries from the ValueTable.

Definition at line 708 of file GVN.cpp.

erase()

void GVNPass::ValueTable::erase

(

Value *

v

)

Remove a value from the value numbering.

Definition at line 720 of file GVN.cpp.

Referenced by llvm::GVNPass::markInstructionForDeletion().

eraseTranslateCacheEntry()

void GVNPass::ValueTable::eraseTranslateCacheEntry	(	uint32_t	Num,
		const BasicBlock &	CurrBlock
	)

Erase stale entry from phiTranslate cache so phiTranslate can be computed again.

Definition at line 2336 of file GVN.cpp.

References llvm::predecessors().

exists()

bool GVNPass::ValueTable::exists

(

Value *

V

)

const

Returns true if a value number exists for the specified value.

Definition at line 602 of file GVN.cpp.

getAliasAnalysis()

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

inline

Definition at line 210 of file GVN.h.

Referenced by llvm::GVNPass::getAliasAnalysis().

getNextUnusedValueNumber()

uint32_t llvm::GVNPass::ValueTable::getNextUnusedValueNumber ( )

inline

Definition at line 213 of file GVN.h.

lookup()

uint32_t GVNPass::ValueTable::lookup	(	Value *	V,
		bool	Verify = true
	)		const

Returns the value number of the specified value.

Fails if the value has not yet been numbered.

Definition at line 687 of file GVN.cpp.

References assert(), and Verify.

lookupOrAdd()

uint32_t GVNPass::ValueTable::lookupOrAdd

(

Value *

V

)

lookup_or_add - Returns the value number for the specified value, assigning it a new number if it did not have one before.

Definition at line 608 of file GVN.cpp.

References I.

Referenced by llvm::CallInfo::insert(), llvm::InsnInfo::insert(), llvm::LoadInfo::insert(), and llvm::StoreInfo::insert().

lookupOrAddCmp()

uint32_t GVNPass::ValueTable::lookupOrAddCmp	(	unsigned	Opcode,
		CmpInst::Predicate	Predicate,
		Value *	LHS,
		Value *	RHS
	)

Returns the value number of the given comparison, assigning it a new number if it did not have one before.

Useful when we deduced the result of a comparison, but don't immediately have an instruction realizing that comparison to hand.

Definition at line 700 of file GVN.cpp.

References LHS, and RHS.

operator=()

GVNPass::ValueTable & GVNPass::ValueTable::operator= ( const ValueTable &  Arg )

default

phiTranslate()

uint32_t GVNPass::ValueTable::phiTranslate	(	const BasicBlock *	BB,
		const BasicBlock *	PhiBlock,
		uint32_t	Num,
		GVNPass &	Gvn
	)

Wrap phiTranslateImpl to provide caching functionality.

Definition at line 2233 of file GVN.cpp.

setAliasAnalysis()

void llvm::GVNPass::ValueTable::setAliasAnalysis ( AAResults *  A )

inline

Definition at line 209 of file GVN.h.

References A.

setDomTree()

void llvm::GVNPass::ValueTable::setDomTree ( DominatorTree *  D )

inline

Definition at line 212 of file GVN.h.

References D.

setMemDep()

void llvm::GVNPass::ValueTable::setMemDep ( MemoryDependenceResults *  M )

inline

Definition at line 211 of file GVN.h.

verifyRemoved()

void GVNPass::ValueTable::verifyRemoved

(

const Value *

V

)

const

verifyRemoved - Verify that the value is removed from all internal data structures.

Definition at line 730 of file GVN.cpp.

References assert().

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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