llvm::gvn::AvailableValue Struct Reference

Represents a particular available value that we know how to materialize. More...

Collaboration diagram for llvm::gvn::AvailableValue:

Public Types
enum	ValType { SimpleVal, LoadVal, MemIntrin, UndefVal }

Public Member Functions
bool	isSimpleValue () const
bool	isCoercedLoadValue () const
bool	isMemIntrinValue () const
bool	isUndefValue () const
Value *	getSimpleValue () const
LoadInst *	getCoercedLoadValue () const
MemIntrinsic *	getMemIntrinValue () const
Value *	MaterializeAdjustedValue (LoadInst *LI, Instruction *InsertPt, GVN &gvn) const
	Emit code at the specified insertion point to adjust the value defined here to the specified type. More...

Static Public Member Functions
static AvailableValue	get (Value *V, unsigned Offset=0)
static AvailableValue	getMI (MemIntrinsic *MI, unsigned Offset=0)
static AvailableValue	getLoad (LoadInst *LI, unsigned Offset=0)
static AvailableValue	getUndef ()

Public Attributes
PointerIntPair< Value *, 2, ValType >	Val
	V - The value that is live out of the block. More...
unsigned	Offset
	Offset - The byte offset in Val that is interesting for the load query. More...

Detailed Description

Represents a particular available value that we know how to materialize.

Materialization of an AvailableValue never fails. An AvailableValue is implicitly associated with a rematerialization point which is the location of the instruction from which it was formed.

Definition at line 162 of file GVN.cpp.

Member Enumeration Documentation

ValType

enum llvm::gvn::AvailableValue::ValType

Enumerator
SimpleVal
LoadVal
MemIntrin
UndefVal

Definition at line 163 of file GVN.cpp.

Member Function Documentation

get()

static AvailableValue llvm::gvn::AvailableValue::get ( Value *  V, unsigned  Offset = 0  )

inlinestatic

Definition at line 177 of file GVN.cpp.

References Offset, and Val.

Referenced by llvm::gvn::AvailableValueInBlock::get(), and reportMayClobberedLoad().

getCoercedLoadValue()

LoadInst* llvm::gvn::AvailableValue::getCoercedLoadValue ( ) const

inline

Definition at line 219 of file GVN.cpp.

References assert(), and llvm::PointerIntPair< PointerTy, IntBits, IntType, PtrTraits, Info >::getPointer().

getLoad()

static AvailableValue llvm::gvn::AvailableValue::getLoad ( LoadInst *  LI, unsigned  Offset = 0  )

inlinestatic

Definition at line 193 of file GVN.cpp.

References Offset, and Val.

Referenced by reportMayClobberedLoad().

getMemIntrinValue()

MemIntrinsic* llvm::gvn::AvailableValue::getMemIntrinValue ( ) const

inline

Definition at line 224 of file GVN.cpp.

References assert(), and llvm::PointerIntPair< PointerTy, IntBits, IntType, PtrTraits, Info >::getPointer().

getMI()

static AvailableValue llvm::gvn::AvailableValue::getMI ( MemIntrinsic *  MI, unsigned  Offset = 0  )

inlinestatic

Definition at line 185 of file GVN.cpp.

References Offset, and Val.

Referenced by reportMayClobberedLoad().

getSimpleValue()

Value* llvm::gvn::AvailableValue::getSimpleValue ( ) const

inline

Definition at line 214 of file GVN.cpp.

References assert(), and llvm::PointerIntPair< PointerTy, IntBits, IntType, PtrTraits, Info >::getPointer().

getUndef()

static AvailableValue llvm::gvn::AvailableValue::getUndef ( )

inlinestatic

Definition at line 201 of file GVN.cpp.

References Offset, and Val.

Referenced by llvm::gvn::AvailableValueInBlock::getUndef().

isCoercedLoadValue()

bool llvm::gvn::AvailableValue::isCoercedLoadValue ( ) const

inline

Definition at line 210 of file GVN.cpp.

References llvm::PointerIntPair< PointerTy, IntBits, IntType, PtrTraits, Info >::getInt().

isMemIntrinValue()

bool llvm::gvn::AvailableValue::isMemIntrinValue ( ) const

inline

Definition at line 211 of file GVN.cpp.

References llvm::PointerIntPair< PointerTy, IntBits, IntType, PtrTraits, Info >::getInt().

isSimpleValue()

bool llvm::gvn::AvailableValue::isSimpleValue ( ) const

inline

Definition at line 209 of file GVN.cpp.

References llvm::PointerIntPair< PointerTy, IntBits, IntType, PtrTraits, Info >::getInt().

isUndefValue()

bool llvm::gvn::AvailableValue::isUndefValue ( ) const

inline

Definition at line 212 of file GVN.cpp.

References llvm::PointerIntPair< PointerTy, IntBits, IntType, PtrTraits, Info >::getInt().

MaterializeAdjustedValue()

Value * AvailableValue::MaterializeAdjustedValue	(	LoadInst *	LI,
		Instruction *	InsertPt,
		GVN &	gvn
	)		const

Emit code at the specified insertion point to adjust the value defined here to the specified type.

This handles various coercion cases.

Definition at line 786 of file GVN.cpp.

References assert(), llvm::dbgs(), llvm::UndefValue::get(), llvm::Module::getDataLayout(), llvm::VNCoercion::getLoadValueForLoad(), llvm::GVN::getMemDep(), llvm::VNCoercion::getMemInstValueForLoad(), llvm::Instruction::getModule(), llvm::VNCoercion::getStoreValueForLoad(), llvm::Value::getType(), LLVM_DEBUG, llvm::SPII::Load, and llvm::MemoryDependenceResults::removeInstruction().

Referenced by llvm::gvn::AvailableValueInBlock::MaterializeAdjustedValue(), and patchAndReplaceAllUsesWith().

Member Data Documentation

Offset

unsigned llvm::gvn::AvailableValue::Offset

Offset - The byte offset in Val that is interesting for the load query.

Definition at line 175 of file GVN.cpp.

Referenced by get(), getLoad(), getMI(), and getUndef().

Val

PointerIntPair<Value *, 2, ValType> llvm::gvn::AvailableValue::Val

V - The value that is live out of the block.

Definition at line 172 of file GVN.cpp.

Referenced by get(), getLoad(), getMI(), and getUndef().

---

The documentation for this struct was generated from the following file:

• lib/Transforms/Scalar/GVN.cpp