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Multiway switch.More...

#include "llvm/IR/Instructions.h"

Inheritance diagram for llvm::SwitchInst:

Classes
class	CaseHandle

class	CaseHandleImpl
	A handle to a particular switch case.More...

class	CaseIteratorImpl

Public Types
using	ConstCaseHandle =CaseHandleImpl<const SwitchInst,const ConstantInt,const BasicBlock >

using	CaseIt =CaseIteratorImpl<CaseHandle >

using	ConstCaseIt =CaseIteratorImpl<ConstCaseHandle >

Public Types inherited fromllvm::Instruction
enum	OperationEquivalenceFlags {CompareIgnoringAlignment = 1 << 0,CompareUsingScalarTypes = 1 << 1,CompareUsingIntersectedAttrs = 1 << 2 }
	When checking for operation equivalence (using isSameOperationAs) it is sometimes useful to ignore certain attributes.More...

enum	TermOps

enum	UnaryOps

enum	BinaryOps

enum	MemoryOps

enum	CastOps

enum	FuncletPadOps

enum	OtherOps

using	InstListType =SymbolTableList<Instruction,ilist_iterator_bits<true >,ilist_parent<BasicBlock > >

Public Types inherited fromllvm::User
using	op_iterator =Use *

using	const_op_iterator =const Use *

using	op_range =iterator_range<op_iterator >

using	const_op_range =iterator_range<const_op_iterator >

Public Types inherited fromllvm::Value
enum	ValueTy
	Concrete subclass of this.More...

using	use_iterator = use_iterator_impl<Use >

using	const_use_iterator = use_iterator_impl<const Use >

using	user_iterator = user_iterator_impl<User >

using	const_user_iterator = user_iterator_impl<const User >

Public Member Functions
void	operator delete (void *Ptr)

	DECLARE_TRANSPARENT_OPERAND_ACCESSORS (Value)
	Provide fast operand accessors.

Value *	getCondition ()const

void	setCondition (Value *V)

BasicBlock *	getDefaultDest ()const

bool	defaultDestUndefined ()const
	Returns true if the default branch must result in immediate undefined behavior, false otherwise.

void	setDefaultDest (BasicBlock *DefaultCase)

unsigned	getNumCases ()const
	Return the number of 'cases' in this switch instruction, excluding the default case.

CaseIt	case_begin ()
	Returns a read/write iterator that points to the first case in theSwitchInst.

ConstCaseIt	case_begin ()const
	Returns a read-only iterator that points to the first case in theSwitchInst.

CaseIt	case_end ()
	Returns a read/write iterator that points one past the last in theSwitchInst.

ConstCaseIt	case_end ()const
	Returns a read-only iterator that points one past the last in theSwitchInst.

iterator_range<CaseIt >	cases ()
	Iteration adapter for range-for loops.

iterator_range<ConstCaseIt >	cases ()const
	Constant iteration adapter for range-for loops.

CaseIt	case_default ()
	Returns an iterator that points to the default case.

ConstCaseIt	case_default ()const

CaseIt	findCaseValue (const ConstantInt *C)
	Search all of the case values for the specified constant.

ConstCaseIt	findCaseValue (const ConstantInt *C)const

ConstantInt *	findCaseDest (BasicBlock *BB)
	Finds the unique case value for a given successor.

void	addCase (ConstantInt OnVal,BasicBlock Dest)
	Add an entry to the switch instruction.

CaseIt	removeCase (CaseIt I)
	This method removes the specified case and its successor from the switch instruction.

unsigned	getNumSuccessors ()const

BasicBlock *	getSuccessor (unsigned idx)const

void	setSuccessor (unsigned idx,BasicBlock *NewSucc)

Public Member Functions inherited fromllvm::Instruction
iterator_range<simple_ilist<DbgRecord >::iterator >	cloneDebugInfoFrom (const Instruction *From, std::optional<simple_ilist<DbgRecord >::iterator > FromHere=std::nullopt,bool InsertAtHead=false)
	Clone any debug-info attached to`From` onto this instruction.

iterator_range<simple_ilist<DbgRecord >::iterator >	getDbgRecordRange ()const
	Return a range over the DbgRecords attached to this instruction.

std::optional<simple_ilist<DbgRecord >::iterator >	getDbgReinsertionPosition ()
	Return an iterator to the position of the "Next"DbgRecord after this instruction, or std::nullopt.

bool	hasDbgRecords ()const
	Returns true if any DbgRecords are attached to this instruction.

void	adoptDbgRecords (BasicBlock *BB,InstListType::iterator It,bool InsertAtHead)
	Transfer any DbgRecords on the position`It` onto this instruction, by simply adopting the sequence of DbgRecords (which is efficient) if possible, by merging two sequences otherwise.

void	dropDbgRecords ()
	Erase any DbgRecords attached to this instruction.

void	dropOneDbgRecord (DbgRecord *I)
	Erase a singleDbgRecord`I` that is attached to this instruction.

void	handleMarkerRemoval ()
	Handle the debug-info implications of this instruction being removed.

	Instruction (const Instruction &)=delete

Instruction &	operator= (const Instruction &)=delete

Instruction *	user_back ()
	Specialize the methods defined inValue, as we know that an instruction can only be used by other instructions.

const Instruction *	user_back ()const

const Module *	getModule ()const
	Return the module owning the function this instruction belongs to or nullptr it the function does not have a module.

Module *	getModule ()

const Function *	getFunction ()const
	Return the function this instruction belongs to.

Function *	getFunction ()

const DataLayout &	getDataLayout ()const
	Get the data layout of the module this instruction belongs to.

void	removeFromParent ()
	This method unlinks 'this' from the containing basic block, but does not delete it.

InstListType::iterator	eraseFromParent ()
	This method unlinks 'this' from the containing basic block and deletes it.

void	insertBefore (Instruction *InsertPos)
	Insert an unlinked instruction into a basic block immediately before the specified instruction.

void	insertBefore (InstListType::iterator InsertPos)
	Insert an unlinked instruction into a basic block immediately before the specified position.

void	insertAfter (Instruction *InsertPos)
	Insert an unlinked instruction into a basic block immediately after the specified instruction.

void	insertAfter (InstListType::iterator InsertPos)
	Insert an unlinked instruction into a basic block immediately after the specified position.

InstListType::iterator	insertInto (BasicBlock *ParentBB,InstListType::iterator It)
	Inserts an unlinked instruction into`ParentBB` at position`It` and returns the iterator of the inserted instruction.

void	insertBefore (BasicBlock &BB,InstListType::iterator InsertPos)

void	moveBefore (Instruction *MovePos)
	Unlink this instruction from its current basic block and insert it into the basic block that MovePos lives in, right before MovePos.

void	moveBefore (InstListType::iterator InsertPos)
	Unlink this instruction from its current basic block and insert it into the basic block that MovePos lives in, right before MovePos.

void	moveBeforePreserving (InstListType::iterator MovePos)
	Perform amoveBefore operation, while signalling that the caller intends to preserve the original ordering of instructions.

void	moveBeforePreserving (BasicBlock &BB,InstListType::iterator I)
	Perform amoveBefore operation, while signalling that the caller intends to preserve the original ordering of instructions.

void	moveBeforePreserving (Instruction *MovePos)
	Perform amoveBefore operation, while signalling that the caller intends to preserve the original ordering of instructions.

void	moveBefore (BasicBlock &BB,InstListType::iterator I)
	Unlink this instruction and insert into BB before I.

void	moveAfter (Instruction *MovePos)
	Unlink this instruction from its current basic block and insert it into the basic block that MovePos lives in, right after MovePos.

void	moveAfter (InstListType::iterator MovePos)
	Unlink this instruction from its current basic block and insert it into the basic block that MovePos lives in, right after MovePos.

void	moveAfterPreserving (Instruction *MovePos)
	SeemoveBeforePreserving .

bool	comesBefore (const Instruction *Other)const
	Given an instruction Other in the same basic block as this instruction, return true if this instruction comes before Other.

std::optional<InstListType::iterator >	getInsertionPointAfterDef ()
	Get the first insertion point at which the result of this instruction is defined.

unsigned	getOpcode ()const
	Returns a member of one of the enums like Instruction::Add.

const char *	getOpcodeName ()const

bool	isTerminator ()const

bool	isUnaryOp ()const

bool	isBinaryOp ()const

bool	isIntDivRem ()const

bool	isFPDivRem ()const

bool	isShift ()const

bool	isCast ()const

bool	isFuncletPad ()const

bool	isSpecialTerminator ()const

bool	isOnlyUserOfAnyOperand ()
	It checks if this instruction is the only user of at least one of its operands.

bool	isLogicalShift ()const
	Return true if this is a logical shift left or a logical shift right.

bool	isArithmeticShift ()const
	Return true if this is an arithmetic shift right.

bool	isBitwiseLogicOp ()const
	Return true if this is and/or/xor.

bool	hasMetadata ()const
	Return true if this instruction has any metadata attached to it.

bool	hasNonDebugLocLoopMetadata ()const

bool	hasMetadataOtherThanDebugLoc ()const
	Return true if this instruction has metadata attached to it other than a debug location.

bool	hasMetadata (unsigned KindID)const
	Return true if this instruction has the given type of metadata attached.

bool	hasMetadata (StringRef Kind)const
	Return true if this instruction has the given type of metadata attached.

MDNode *	getMetadata (unsigned KindID)const
	Get the metadata of given kind attached to thisInstruction.

MDNode *	getMetadata (StringRef Kind)const
	Get the metadata of given kind attached to thisInstruction.

void	getAllMetadata (SmallVectorImpl< std::pair<unsigned,MDNode * > > &MDs)const
	Get all metadata attached to thisInstruction.

void	getAllMetadataOtherThanDebugLoc (SmallVectorImpl< std::pair<unsigned,MDNode * > > &MDs)const
	This does the same thing as getAllMetadata, except that it filters out the debug location.

void	setMetadata (unsigned KindID,MDNode *Node)
	Set the metadata of the specified kind to the specified node.

void	setMetadata (StringRef Kind,MDNode *Node)

void	copyMetadata (const Instruction &SrcInst,ArrayRef<unsigned > WL=ArrayRef<unsigned >())
	Copy metadata from`SrcInst` to this instruction.

void	eraseMetadataIf (function_ref<bool(unsigned,MDNode *)> Pred)
	Erase all metadata that matches the predicate.

void	swapProfMetadata ()
	If the instruction has "branch_weights" MD_prof metadata and theMDNode has three operands (including name string), swap the order of the metadata.

void	addAnnotationMetadata (StringRef Annotation)
	Adds an !annotation metadata node with`Annotation` to this instruction.

void	addAnnotationMetadata (SmallVector<StringRef >Annotations)
	Adds an !annotation metadata node with an array of`Annotations` as a tuple to this instruction.

AAMDNodes	getAAMetadata ()const
	Returns theAA metadata for this instruction.

void	setAAMetadata (const AAMDNodes &N)
	Sets theAA metadata on this instruction from theAAMDNodes structure.

void	setNoSanitizeMetadata ()
	Sets the nosanitize metadata on this instruction.

bool	extractProfTotalWeight (uint64_t &TotalVal)const
	Retrieve total raw weight values of a branch.

void	setDebugLoc (DebugLoc Loc)
	Set the debug location information for this instruction.

const DebugLoc &	getDebugLoc ()const
	Return the debug location for this node as aDebugLoc.

const DebugLoc &	getStableDebugLoc ()const
	Fetch the debug location for this node, unless this is a debug intrinsic, in which case fetch the debug location of the next non-debug node.

void	setHasNoUnsignedWrap (bool b=true)
	Set or clear the nuw flag on this instruction, which must be an operator which supports this flag.

void	setHasNoSignedWrap (bool b=true)
	Set or clear the nsw flag on this instruction, which must be an operator which supports this flag.

void	setIsExact (bool b=true)
	Set or clear the exact flag on this instruction, which must be an operator which supports this flag.

void	setNonNeg (bool b=true)
	Set or clear the nneg flag on this instruction, which must be a zext instruction.

bool	hasNoUnsignedWrap ()const LLVM_READONLY
	Determine whether the no unsigned wrap flag is set.

bool	hasNoSignedWrap ()const LLVM_READONLY
	Determine whether the no signed wrap flag is set.

bool	hasNonNeg ()const LLVM_READONLY
	Determine whether the the nneg flag is set.

bool	hasPoisonGeneratingFlags ()const LLVM_READONLY
	Return true if this operator has flags which may cause this instruction to evaluate to poison despite having non-poison inputs.

void	dropPoisonGeneratingFlags ()
	Drops flags that may cause this instruction to evaluate to poison despite having non-poison inputs.

bool	hasPoisonGeneratingMetadata ()const LLVM_READONLY
	Return true if this instruction has poison-generating metadata.

void	dropPoisonGeneratingMetadata ()
	Drops metadata that may generate poison.

bool	hasPoisonGeneratingReturnAttributes ()const LLVM_READONLY
	Return true if this instruction has poison-generating attribute.

void	dropPoisonGeneratingReturnAttributes ()
	Drops return attributes that may generate poison.

bool	hasPoisonGeneratingAnnotations ()const
	Return true if this instruction has poison-generating flags, return attributes or metadata.

void	dropPoisonGeneratingAnnotations ()
	Drops flags, return attributes and metadata that may generate poison.

void	dropUBImplyingAttrsAndUnknownMetadata (ArrayRef<unsigned > KnownIDs={})
	This function drops non-debug unknown metadata (through dropUnknownNonDebugMetadata).

void	dropUBImplyingAttrsAndMetadata ()
	Drop any attributes or metadata that can cause immediate undefined behavior.

bool	isExact ()const LLVM_READONLY
	Determine whether the exact flag is set.

void	setFast (bool B)
	Set or clear all fast-math-flags on this instruction, which must be an operator which supports this flag.

void	setHasAllowReassoc (bool B)
	Set or clear the reassociation flag on this instruction, which must be an operator which supports this flag.

void	setHasNoNaNs (bool B)
	Set or clear the no-nans flag on this instruction, which must be an operator which supports this flag.

void	setHasNoInfs (bool B)
	Set or clear the no-infs flag on this instruction, which must be an operator which supports this flag.

void	setHasNoSignedZeros (bool B)
	Set or clear the no-signed-zeros flag on this instruction, which must be an operator which supports this flag.

void	setHasAllowReciprocal (bool B)
	Set or clear the allow-reciprocal flag on this instruction, which must be an operator which supports this flag.

void	setHasAllowContract (bool B)
	Set or clear the allow-contract flag on this instruction, which must be an operator which supports this flag.

void	setHasApproxFunc (bool B)
	Set or clear the approximate-math-functions flag on this instruction, which must be an operator which supports this flag.

void	setFastMathFlags (FastMathFlags FMF)
	Convenience function for setting multiple fast-math flags on this instruction, which must be an operator which supports these flags.

void	copyFastMathFlags (FastMathFlags FMF)
	Convenience function for transferring all fast-math flag values to this instruction, which must be an operator which supports these flags.

bool	isFast ()const LLVM_READONLY
	Determine whether all fast-math-flags are set.

bool	hasAllowReassoc ()const LLVM_READONLY
	Determine whether the allow-reassociation flag is set.

bool	hasNoNaNs ()const LLVM_READONLY
	Determine whether the no-NaNs flag is set.

bool	hasNoInfs ()const LLVM_READONLY
	Determine whether the no-infs flag is set.

bool	hasNoSignedZeros ()const LLVM_READONLY
	Determine whether the no-signed-zeros flag is set.

bool	hasAllowReciprocal ()const LLVM_READONLY
	Determine whether the allow-reciprocal flag is set.

bool	hasAllowContract ()const LLVM_READONLY
	Determine whether the allow-contract flag is set.

bool	hasApproxFunc ()const LLVM_READONLY
	Determine whether the approximate-math-functions flag is set.

FastMathFlags	getFastMathFlags ()const LLVM_READONLY
	Convenience function for getting all the fast-math flags, which must be an operator which supports these flags.

void	copyFastMathFlags (const Instruction *I)
	Copy I's fast-math flags.

void	copyIRFlags (const Value *V,bool IncludeWrapFlags=true)
	Convenience method to copy supported exact, fast-math, and (optionally) wrapping flags from V to this instruction.

void	andIRFlags (const Value *V)
	Logical 'and' of any supported wrapping, exact, and fast-math flags of V and this instruction.

void	applyMergedLocation (DILocation LocA,DILocation LocB)
	Merge 2 debug locations and apply it to theInstruction.

void	updateLocationAfterHoist ()
	Updates the debug location given that the instruction has been hoisted from a block to a predecessor of that block.

void	dropLocation ()
	Drop the instruction's debug location.

void	mergeDIAssignID (ArrayRef<const Instruction * > SourceInstructions)
	Merge theDIAssignID metadata from this instruction and those attached to instructions in`SourceInstructions`.

bool	isAssociative ()const LLVM_READONLY
	Return true if the instruction is associative:

bool	isCommutative ()const LLVM_READONLY
	Return true if the instruction is commutative:

bool	isIdempotent ()const
	Return true if the instruction is idempotent:

bool	isNilpotent ()const
	Return true if the instruction is nilpotent:

bool	mayWriteToMemory ()const LLVM_READONLY
	Return true if this instruction may modify memory.

bool	mayReadFromMemory ()const LLVM_READONLY
	Return true if this instruction may read memory.

bool	mayReadOrWriteMemory ()const
	Return true if this instruction may read or write memory.

bool	isAtomic ()const LLVM_READONLY
	Return true if this instruction has an AtomicOrdering of unordered or higher.

bool	hasAtomicLoad ()const LLVM_READONLY
	Return true if this atomic instruction loads from memory.

bool	hasAtomicStore ()const LLVM_READONLY
	Return true if this atomic instruction stores to memory.

bool	isVolatile ()const LLVM_READONLY
	Return true if this instruction has a volatile memory access.

Type *	getAccessType ()const LLVM_READONLY
	Return the type this instruction accesses in memory, if any.

bool	mayThrow (bool IncludePhaseOneUnwind=false)const LLVM_READONLY
	Return true if this instruction may throw an exception.

bool	isFenceLike ()const
	Return true if this instruction behaves like a memory fence: it can load or store to memory location without being given a memory location.

bool	mayHaveSideEffects ()const LLVM_READONLY
	Return true if the instruction may have side effects.

bool	isSafeToRemove ()const LLVM_READONLY
	Return true if the instruction can be removed if the result is unused.

bool	willReturn ()const LLVM_READONLY
	Return true if the instruction will return (unwinding is considered as a form of returning control flow here).

bool	isEHPad ()const
	Return true if the instruction is a variety of EH-block.

bool	isLifetimeStartOrEnd ()const LLVM_READONLY
	Return true if the instruction is a llvm.lifetime.start or llvm.lifetime.end marker.

bool	isLaunderOrStripInvariantGroup ()const LLVM_READONLY
	Return true if the instruction is a llvm.launder.invariant.group or llvm.strip.invariant.group.

bool	isDebugOrPseudoInst ()const LLVM_READONLY
	Return true if the instruction is aDbgInfoIntrinsic orPseudoProbeInst.

const Instruction *	getNextNonDebugInstruction (bool SkipPseudoOp=false)const
	Return a pointer to the next non-debug instruction in the same basic block as 'this', or nullptr if no such instruction exists.

Instruction *	getNextNonDebugInstruction (bool SkipPseudoOp=false)

const Instruction *	getPrevNonDebugInstruction (bool SkipPseudoOp=false)const
	Return a pointer to the previous non-debug instruction in the same basic block as 'this', or nullptr if no such instruction exists.

Instruction *	getPrevNonDebugInstruction (bool SkipPseudoOp=false)

Instruction *	clone ()const
	Create a copy of 'this' instruction that is identical in all ways except the following:

bool	isIdenticalTo (const Instruction *I)const LLVM_READONLY
	Return true if the specified instruction is exactly identical to the current one.

bool	isIdenticalToWhenDefined (const Instruction *I,bool IntersectAttrs=false)const LLVM_READONLY
	This is like isIdenticalTo, except that it ignores the SubclassOptionalData flags, which may specify conditions under which the instruction's result is undefined.

bool	isSameOperationAs (const Instruction *I,unsigned flags=0)const LLVM_READONLY
	This function determines if the specified instruction executes the same operation as the current one.

bool	hasSameSpecialState (const Instruction *I2,bool IgnoreAlignment=false,bool IntersectAttrs=false)const LLVM_READONLY
	This function determines if the speficied instruction has the same "special" characteristics as the current one.

bool	isUsedOutsideOfBlock (const BasicBlock *BB)const LLVM_READONLY
	Return true if there are any uses of this instruction in blocks other than the specified block.

unsigned	getNumSuccessors ()const LLVM_READONLY
	Return the number of successors that this instruction has.

BasicBlock *	getSuccessor (unsigned Idx)const LLVM_READONLY
	Return the specified successor. This instruction must be a terminator.

void	setSuccessor (unsigned Idx,BasicBlock *BB)
	Update the specified successor to point at the provided block.

void	replaceSuccessorWith (BasicBlock OldBB,BasicBlock NewBB)
	Replace specified successor OldBB to point at the provided block.

void	dropUnknownNonDebugMetadata (ArrayRef<unsigned > KnownIDs={})
	Drop all unknown metadata except for debug locations.

Public Member Functions inherited fromllvm::User
	User (const User &)=delete

void	operator delete (void *Usr)
	Free memory allocated forUser andUse objects.

void	operator delete (void *Usr,HungOffOperandsAllocMarker)
	Placement delete - required by std, called if the ctor throws.

void	operator delete (void *Usr,IntrusiveOperandsAllocMarker)
	Placement delete - required by std, called if the ctor throws.

void	operator delete (void *Usr,IntrusiveOperandsAndDescriptorAllocMarker)
	Placement delete - required by std, called if the ctor throws.

const Use *	getOperandList ()const

Use *	getOperandList ()

Value *	getOperand (unsigned i)const

void	setOperand (unsigned i,Value *Val)

const Use &	getOperandUse (unsigned i)const

Use &	getOperandUse (unsigned i)

unsigned	getNumOperands ()const

ArrayRef<const uint8_t >	getDescriptor ()const
	Returns the descriptor co-allocated with thisUser instance.

MutableArrayRef<uint8_t >	getDescriptor ()
	Returns the descriptor co-allocated with thisUser instance.

void	setNumHungOffUseOperands (unsigned NumOps)
	Subclasses with hung off uses need to manage the operand count themselves.

bool	isDroppable ()const
	A droppable user is a user for which uses can be dropped without affecting correctness and should be dropped rather than preventing a transformation from happening.

op_iterator	op_begin ()

const_op_iterator	op_begin ()const

op_iterator	op_end ()

const_op_iterator	op_end ()const

op_range	operands ()

const_op_range	operands ()const

value_op_iterator	value_op_begin ()

value_op_iterator	value_op_end ()

iterator_range<value_op_iterator >	operand_values ()

const_value_op_iterator	value_op_begin ()const

const_value_op_iterator	value_op_end ()const

iterator_range<const_value_op_iterator >	operand_values ()const

void	dropAllReferences ()
	Drop all references to operands.

bool	replaceUsesOfWith (Value From,Value To)
	Replace uses of oneValue with another.

Public Member Functions inherited fromllvm::Value
	Value (const Value &)=delete

Value &	operator= (const Value &)=delete

void	deleteValue ()
	Delete a pointer to a genericValue.

void	dump ()const
	Support for debugging, callable in GDB: V->dump()

Type *	getType ()const
	All values are typed, get the type of this value.

LLVMContext &	getContext ()const
	All values hold a context through their type.

bool	hasName ()const

ValueName *	getValueName ()const

void	setValueName (ValueName *VN)

StringRef	getName ()const
	Return a constant reference to the value's name.

void	setName (const Twine &Name)
	Change the name of the value.

void	takeName (Value *V)
	Transfer the name from V to this value.

std::string	getNameOrAsOperand ()const

void	replaceAllUsesWith (Value *V)
	Change all uses of this to point to a newValue.

void	replaceNonMetadataUsesWith (Value *V)
	Change non-metadata uses of this to point to a newValue.

void	replaceUsesWithIf (Value *New,llvm::function_ref<bool(Use &U)> ShouldReplace)
	Go through the uses list for this definition and make each use point to "V" if the callback ShouldReplace returns true for the givenUse.

void	replaceUsesOutsideBlock (Value V,BasicBlock BB)
	replaceUsesOutsideBlock - Go through the uses list for this definition and make each use point to "V" instead of "this" when the use is outside the block.

void	assertModuleIsMaterializedImpl ()const

void	assertModuleIsMaterialized ()const

bool	use_empty ()const

bool	materialized_use_empty ()const

use_iterator	materialized_use_begin ()

const_use_iterator	materialized_use_begin ()const

use_iterator	use_begin ()

const_use_iterator	use_begin ()const

use_iterator	use_end ()

const_use_iterator	use_end ()const

iterator_range<use_iterator >	materialized_uses ()

iterator_range<const_use_iterator >	materialized_uses ()const

iterator_range<use_iterator >	uses ()

iterator_range<const_use_iterator >	uses ()const

bool	user_empty ()const

user_iterator	materialized_user_begin ()

const_user_iterator	materialized_user_begin ()const

user_iterator	user_begin ()

const_user_iterator	user_begin ()const

user_iterator	user_end ()

const_user_iterator	user_end ()const

User *	user_back ()

const User *	user_back ()const

iterator_range<user_iterator >	materialized_users ()

iterator_range<const_user_iterator >	materialized_users ()const

iterator_range<user_iterator >	users ()

iterator_range<const_user_iterator >	users ()const

bool	hasOneUse ()const
	Return true if there is exactly one use of this value.

bool	hasNUses (unsigned N)const
	Return true if thisValue has exactly N uses.

bool	hasNUsesOrMore (unsigned N)const
	Return true if this value has N uses or more.

bool	hasOneUser ()const
	Return true if there is exactly one user of this value.

Use *	getSingleUndroppableUse ()
	Return true if there is exactly one use of this value that cannot be dropped.

const Use *	getSingleUndroppableUse ()const

User *	getUniqueUndroppableUser ()
	Return true if there is exactly one unique user of this value that cannot be dropped (that user can have multiple uses of this value).

const User *	getUniqueUndroppableUser ()const

bool	hasNUndroppableUses (unsigned N)const
	Return true if there this value.

bool	hasNUndroppableUsesOrMore (unsigned N)const
	Return true if this value has N uses or more.

void	dropDroppableUses (llvm::function_ref<bool(const Use )> ShouldDrop=[](const Use ) { returntrue;})
	Remove every uses that can safely be removed.

void	dropDroppableUsesIn (User &Usr)
	Remove every use of this value in`User` that can safely be removed.

bool	isUsedInBasicBlock (const BasicBlock *BB)const
	Check if this value is used in the specified basic block.

unsigned	getNumUses ()const
	This method computes the number of uses of thisValue.

void	addUse (Use &U)
	This method should only be used by theUse class.

unsigned	getValueID ()const
	Return an ID for the concrete type of this object.

unsigned	getRawSubclassOptionalData ()const
	Return the raw optional flags value contained in this value.

void	clearSubclassOptionalData ()
	Clear the optional flags contained in this value.

bool	hasSameSubclassOptionalData (const Value *V)const
	Check the optional flags for equality.

bool	hasValueHandle ()const
	Return true if there is a value handle associated with this value.

bool	isUsedByMetadata ()const
	Return true if there is metadata referencing this value.

bool	isSwiftError ()const
	Return true if this value is a swifterror value.

const Value *	stripPointerCasts ()const
	Strip off pointer casts, all-zero GEPs and address space casts.

Value *	stripPointerCasts ()

const Value *	stripPointerCastsAndAliases ()const
	Strip off pointer casts, all-zero GEPs, address space casts, and aliases.

Value *	stripPointerCastsAndAliases ()

const Value *	stripPointerCastsSameRepresentation ()const
	Strip off pointer casts, all-zero GEPs and address space casts but ensures the representation of the result stays the same.

Value *	stripPointerCastsSameRepresentation ()

const Value *	stripPointerCastsForAliasAnalysis ()const
	Strip off pointer casts, all-zero GEPs, single-argument phi nodes and invariant group info.

Value *	stripPointerCastsForAliasAnalysis ()

const Value *	stripInBoundsConstantOffsets ()const
	Strip off pointer casts and all-constant inbounds GEPs.

Value *	stripInBoundsConstantOffsets ()

const Value *	stripAndAccumulateConstantOffsets (const DataLayout &DL,APInt &Offset,bool AllowNonInbounds,bool AllowInvariantGroup=false,function_ref<bool(Value &Value,APInt &Offset)> ExternalAnalysis=nullptr)const
	Accumulate the constant offset this value has compared to a base pointer.

Value *	stripAndAccumulateConstantOffsets (const DataLayout &DL,APInt &Offset,bool AllowNonInbounds,bool AllowInvariantGroup=false,function_ref<bool(Value &Value,APInt &Offset)> ExternalAnalysis=nullptr)

const Value *	stripAndAccumulateInBoundsConstantOffsets (const DataLayout &DL,APInt &Offset)const
	This is a wrapper around stripAndAccumulateConstantOffsets with the in-bounds requirement set to false.

Value *	stripAndAccumulateInBoundsConstantOffsets (const DataLayout &DL,APInt &Offset)

const Value *	stripInBoundsOffsets (function_ref< void(const Value )> Func=[](const Value ) {})const
	Strip off pointer casts and inbounds GEPs.

Value *	stripInBoundsOffsets (function_ref< void(const Value )> Func=[](const Value ) {})

std::optional< int64_t >	getPointerOffsetFrom (const Value *Other,const DataLayout &DL)const
	If this ptr is provably equal to`Other` plus a constant offset, return that offset in bytes.

bool	canBeFreed ()const
	Return true if the memory object referred to by V can by freed in the scope for which the SSA value defining the allocation is statically defined.

uint64_t	getPointerDereferenceableBytes (const DataLayout &DL,bool &CanBeNull,bool &CanBeFreed)const
	Returns the number of bytes known to be dereferenceable for the pointer value.

Align	getPointerAlignment (const DataLayout &DL)const
	Returns an alignment of the pointer value.

const Value *	DoPHITranslation (const BasicBlock CurBB,const BasicBlock PredBB)const
	Translate PHI node to its predecessor from the given basic block.

Value *	DoPHITranslation (const BasicBlock CurBB,const BasicBlock PredBB)

void	mutateType (Type *Ty)
	Mutate the type of thisValue to be of the specified type.

template<class Compare >
void	sortUseList (Compare Cmp)
	Sort the use-list.

void	reverseUseList ()
	Reverse the use-list.

void	print (raw_ostream &O,bool IsForDebug=false)const
	Implement operator<< onValue.

void	print (raw_ostream &O,ModuleSlotTracker &MST,bool IsForDebug=false)const

void	printAsOperand (raw_ostream &O,bool PrintType=true,const Module *M=nullptr)const
	Print the name of thisValue out to the specifiedraw_ostream.

void	printAsOperand (raw_ostream &O,bool PrintType,ModuleSlotTracker &MST)const

Public Member Functions inherited fromllvm::ilist_node_with_parent< Instruction, BasicBlock, ilist_iterator_bits< true >, ilist_parent< BasicBlock > >
Instruction *	getPrevNode ()

const Instruction *	getPrevNode ()const
	Get the previous node, or`nullptr` for the list head.

Instruction *	getNextNode ()
	Get the next node, or`nullptr` for the list tail.

const Instruction *	getNextNode ()const
	Get the next node, or`nullptr` for the list tail.

Public Member Functions inherited fromllvm::ilist_node_impl< ilist_detail::compute_node_options< T, Options... >::type >
self_iterator	getIterator ()

const_self_iterator	getIterator ()const

reverse_self_iterator	getReverseIterator ()

const_reverse_self_iterator	getReverseIterator ()const

bool	isSentinel ()const
	Check whether this is the sentinel node.

Public Member Functions inherited fromllvm::ilist_detail::node_parent_access< NodeTy, ParentTy >
const ParentTy *	getParent ()const

ParentTy *	getParent ()

void	setParent (ParentTy *Parent)

Static Public Member Functions
staticSwitchInst *	Create (Value Value,BasicBlock Default,unsigned NumCases,InsertPosition InsertBefore=nullptr)

staticbool	classof (const Instruction *I)

staticbool	classof (const Value *V)

Static Public Member Functions inherited fromllvm::Instruction
staticconst char *	getOpcodeName (unsigned Opcode)

staticbool	isTerminator (unsigned Opcode)

staticbool	isUnaryOp (unsigned Opcode)

staticbool	isBinaryOp (unsigned Opcode)

staticbool	isIntDivRem (unsigned Opcode)

staticbool	isFPDivRem (unsigned Opcode)

staticbool	isShift (unsigned Opcode)
	Determine if the Opcode is one of the shift instructions.

staticbool	isBitwiseLogicOp (unsigned Opcode)
	Determine if the Opcode is and/or/xor.

staticbool	isCast (unsigned Opcode)
	Determine if the Opcode is one of theCastInst instructions.

staticbool	isFuncletPad (unsigned Opcode)
	Determine if the Opcode is one of theFuncletPadInst instructions.

staticbool	isSpecialTerminator (unsigned Opcode)
	Returns true if the Opcode is a "special" terminator that does more than branch to a successor (e.g.

staticbool	isAssociative (unsigned Opcode)

staticbool	isCommutative (unsigned Opcode)

staticbool	isIdempotent (unsigned Opcode)

staticbool	isNilpotent (unsigned Opcode)

staticbool	classof (const Value *V)
	Methods for support type inquiry through isa, cast, and dyn_cast:

Static Public Member Functions inherited fromllvm::User
staticbool	classof (const Value *V)

Static Public Member Functions inherited fromllvm::Value
static void	dropDroppableUse (Use &U)
	Remove the droppable use`U`.

Static Public Attributes
staticconst unsigned	DefaultPseudoIndex = static_cast<unsigned>(~0L-1)

Static Public Attributes inherited fromllvm::Value
static constexprunsigned	MaxAlignmentExponent = 32
	The maximum alignment for instructions.

static constexpruint64_t	MaximumAlignment = 1ULL <<MaxAlignmentExponent

Protected Member Functions
SwitchInst *	cloneImpl ()const

Protected Member Functions inherited fromllvm::Instruction
	~Instruction ()

template<typename BitfieldElement >
BitfieldElement::Type	getSubclassData ()const

template<typename BitfieldElement >
void	setSubclassData (typename BitfieldElement::TypeValue)

	Instruction (Type *Ty,unsigned iType,AllocInfo AllocInfo,InsertPosition InsertBefore=nullptr)

Protected Member Functions inherited fromllvm::User
void *	operator new (size_tSize)=delete

void *	operator new (size_tSize,HungOffOperandsAllocMarker)
	Allocate aUser with an operand pointer co-allocated.

void *	operator new (size_tSize,IntrusiveOperandsAllocMarker allocTrait)
	Allocate aUser with the operands co-allocated.

void *	operator new (size_tSize,IntrusiveOperandsAndDescriptorAllocMarker allocTrait)
	Allocate aUser with the operands co-allocated.

	User (Type *ty,unsigned vty,AllocInfo AllocInfo)

void	allocHungoffUses (unsigned N,bool IsPhi=false)
	Allocate the array of Uses, followed by a pointer (with bottom bit set) to theUser.

void	growHungoffUses (unsigned N,bool IsPhi=false)
	Grow the number of hung off uses.

	~User ()=default

template<int Idx>
Use &	Op ()

template<int Idx>
const Use &	Op ()const

Protected Member Functions inherited fromllvm::Value
	Value (Type *Ty,unsigned scid)

	~Value ()
	Value's destructor should be virtual by design, but that would require thatValue and all of its subclasses have a vtable that effectively duplicates the information in the value ID.

void	getAllMetadata (SmallVectorImpl< std::pair<unsigned,MDNode * > > &MDs)const
	Appends all metadata attached to this value to`MDs`, sorting by KindID.

bool	hasMetadata ()const
	Return true if this value has any metadata attached to it.

bool	eraseMetadata (unsigned KindID)
	Erase all metadata attachments with the given kind.

void	eraseMetadataIf (function_ref<bool(unsigned,MDNode *)> Pred)
	Erase all metadata attachments matching the given predicate.

void	clearMetadata ()
	Erase all metadata attached to thisValue.

MDNode *	getMetadataImpl (unsigned KindID)const
	Get metadata for the given kind, if any.

unsigned short	getSubclassDataFromValue ()const

void	setValueSubclassData (unsigned shortD)

MDNode *	getMetadata (unsigned KindID)const
	Get the current metadata attachments for the given kind, if any.

MDNode *	getMetadata (StringRef Kind)const

void	getMetadata (unsigned KindID,SmallVectorImpl<MDNode * > &MDs)const
	Appends all attachments with the given ID to`MDs` in insertion order.

void	getMetadata (StringRef Kind,SmallVectorImpl<MDNode * > &MDs)const

bool	hasMetadata (unsigned KindID)const
	Return true if this value has the given type of metadata attached.

bool	hasMetadata (StringRef Kind)const

void	setMetadata (unsigned KindID,MDNode *Node)
	Set a particular kind of metadata attachment.

void	setMetadata (StringRef Kind,MDNode *Node)

void	addMetadata (unsigned KindID,MDNode &MD)
	Add a metadata attachment.

void	addMetadata (StringRef Kind,MDNode &MD)

Protected Member Functions inherited fromllvm::ilist_node_with_parent< Instruction, BasicBlock, ilist_iterator_bits< true >, ilist_parent< BasicBlock > >
	ilist_node_with_parent ()=default

Protected Member Functions inherited fromllvm::ilist_node_impl< ilist_detail::compute_node_options< T, Options... >::type >
	ilist_node_impl ()=default

Friends
class	Instruction

Additional Inherited Members
Public Attributes inherited fromllvm::Instruction
DbgMarker *	DebugMarker = nullptr
	Optional marker recording the position for debugging information that takes effect immediately before this instruction.

Protected Types inherited fromllvm::Instruction
using	OpaqueField =Bitfield::Element<uint16_t, 0, 15 >

template<unsigned Offset>
using	AlignmentBitfieldElementT = typenameBitfield::Element<unsigned,Offset, 6,Value::MaxAlignmentExponent >

template<unsigned Offset>
using	BoolBitfieldElementT = typenameBitfield::Element<bool,Offset, 1 >

template<unsigned Offset>
using	AtomicOrderingBitfieldElementT = typenameBitfield::Element<AtomicOrdering,Offset, 3,AtomicOrdering::LAST >

Protected Types inherited fromllvm::Value
enum	: unsigned {NumUserOperandsBits = 27 }
	The number of operands in the subclass.More...

Protected Types inherited fromllvm::ilist_node_impl< ilist_detail::compute_node_options< T, Options... >::type >
using	self_iterator = typenameilist_select_iterator_type< OptionsT::has_iterator_bits,ilist_detail::compute_node_options<T, Options... >::type, false, false >::type

using	const_self_iterator = typenameilist_select_iterator_type< OptionsT::has_iterator_bits,ilist_detail::compute_node_options<T, Options... >::type, false,true >::type

using	reverse_self_iterator = typenameilist_select_iterator_type< OptionsT::has_iterator_bits,ilist_detail::compute_node_options<T, Options... >::type,true, false >::type

using	const_reverse_self_iterator = typenameilist_select_iterator_type< OptionsT::has_iterator_bits,ilist_detail::compute_node_options<T, Options... >::type,true,true >::type

Static Protected Member Functions inherited fromllvm::User
template<int Idx, typename U >
staticUse &	OpFrom (const U *that)

Protected Attributes inherited fromllvm::Value
unsigned char	SubclassOptionalData: 7
	Hold subclass data that can be dropped.

unsigned	NumUserOperands:NumUserOperandsBits

unsigned	IsUsedByMD: 1

unsigned	HasName: 1

unsigned	HasMetadata: 1

unsigned	HasHungOffUses: 1

unsigned	HasDescriptor: 1

Detailed Description

Multiway switch.

Definition at line3154 of fileInstructions.h.

Member Typedef Documentation

◆ CaseIt

usingllvm::SwitchInst::CaseIt =CaseIteratorImpl<CaseHandle>

Definition at line3335 of fileInstructions.h.

◆ ConstCaseHandle

usingllvm::SwitchInst::ConstCaseHandle =CaseHandleImpl<const SwitchInst,const ConstantInt,const BasicBlock>

Definition at line3246 of fileInstructions.h.

◆ ConstCaseIt

usingllvm::SwitchInst::ConstCaseIt =CaseIteratorImpl<ConstCaseHandle>

Definition at line3336 of fileInstructions.h.

Member Function Documentation

◆ addCase()

void SwitchInst::addCase	(	ConstantInt *	OnVal,
		BasicBlock *	Dest
	)

Add an entry to the switch instruction.

addCase - Add an entry to the switch instruction...

Note: This action invalidatescase_end(). Oldcase_end() iterator will point to the added case.

Definition at line4011 of fileInstructions.cpp.

Referencesassert(),getNumCases(),llvm::User::getNumOperands(),llvm::User::setNumHungOffUseOperands(),llvm::SwitchInst::CaseHandle::setSuccessor(), andllvm::SwitchInst::CaseHandle::setValue().

Referenced byllvm::OpenMPIRBuilder::createSections(),createSwitchStatement(), andllvm::SPIRVMergeRegionExitTargets::runOnConvergenceRegionNoRecurse().

◆ case_begin()[1/2]

CaseIt llvm::SwitchInst::case_begin

(

)

inline

Returns a read/write iterator that points to the first case in theSwitchInst.

Definition at line3373 of fileInstructions.h.

◆ case_begin()[2/2]

ConstCaseIt llvm::SwitchInst::case_begin

(

)

const

inline

Returns a read-only iterator that points to the first case in theSwitchInst.

Definition at line3379 of fileInstructions.h.

◆ case_default()[1/2]

CaseIt llvm::SwitchInst::case_default

(

)

inline

Returns an iterator that points to the default case.

Note: this iterator allows to resolve successor only. Attempt to resolve case value causes an assertion. Also note, that increment and decrement also causes an assertion and makes iterator invalid.

Definition at line3410 of fileInstructions.h.

◆ case_default()[2/2]

ConstCaseIt llvm::SwitchInst::case_default

(

)

const

inline

Definition at line3413 of fileInstructions.h.

◆ case_end()[1/2]

CaseIt llvm::SwitchInst::case_end

(

)

inline

Returns a read/write iterator that points one past the last in theSwitchInst.

Definition at line3385 of fileInstructions.h.

◆ case_end()[2/2]

ConstCaseIt llvm::SwitchInst::case_end

(

)

const

inline

Returns a read-only iterator that points one past the last in theSwitchInst.

Definition at line3391 of fileInstructions.h.

◆ cases()[1/2]

iterator_range<CaseIt > llvm::SwitchInst::cases

(

)

inline

Iteration adapter for range-for loops.

Definition at line3396 of fileInstructions.h.

Referencesllvm::make_range().

Referenced byunswitchNontrivialInvariants().

◆ cases()[2/2]

iterator_range<ConstCaseIt > llvm::SwitchInst::cases

(

)

const

inline

Constant iteration adapter for range-for loops.

Definition at line3401 of fileInstructions.h.

Referencesllvm::make_range().

◆ classof()[1/2]

staticbool llvm::SwitchInst::classof

(

const Instruction *

)

inlinestatic

Definition at line3482 of fileInstructions.h.

ReferencesI.

◆ classof()[2/2]

staticbool llvm::SwitchInst::classof

(

const Value *

)

inlinestatic

Definition at line3485 of fileInstructions.h.

◆ cloneImpl()

SwitchInst * SwitchInst::cloneImpl

(

)

const

protected

Definition at line4426 of fileInstructions.cpp.

◆ Create()

staticSwitchInst * llvm::SwitchInst::Create	(	Value *	Value,
		BasicBlock *	Default,
		unsigned	NumCases,
		InsertPosition	InsertBefore =`nullptr`
	)

inlinestatic

Definition at line3338 of fileInstructions.h.

Referencesllvm::Default.

Referenced byllvm::IRBuilderBase::CreateSwitch(),createSwitchStatement(),llvm::InsertCFGStrategy::mutate(),runImpl(), andunswitchTrivialSwitch().

◆ DECLARE_TRANSPARENT_OPERAND_ACCESSORS()

llvm::SwitchInst::DECLARE_TRANSPARENT_OPERAND_ACCESSORS

(

Value

)

Provide fast operand accessors.

◆ defaultDestUndefined()

bool llvm::SwitchInst::defaultDestUndefined

(

)

const

inline

Returns true if the default branch must result in immediate undefined behavior, false otherwise.

Definition at line3357 of fileInstructions.h.

◆ findCaseDest()

ConstantInt * llvm::SwitchInst::findCaseDest

(

BasicBlock *

)

inline

Finds the unique case value for a given successor.

Returns null if the successor is not found, not unique, or is the default case.

Definition at line3438 of fileInstructions.h.

◆ findCaseValue()[1/2]

CaseIt llvm::SwitchInst::findCaseValue

(

const ConstantInt *

)

inline

Search all of the case values for the specified constant.

If it is explicitly handled, return the case iterator of it, otherwise return default case iterator to indicate that it is handled by the default handler.

Definition at line3421 of fileInstructions.h.

Referencesllvm::CallingConv::C.

◆ findCaseValue()[2/2]

ConstCaseIt llvm::SwitchInst::findCaseValue

(

const ConstantInt *

)

const

inline

Definition at line3426 of fileInstructions.h.

Referencesllvm::CallingConv::C,llvm::find_if(),llvm::SwitchInst::CaseHandleImpl< SwitchInstT, ConstantIntT, BasicBlockT >::getCaseValue(), andI.

◆ getCondition()

Value * llvm::SwitchInst::getCondition

(

)

const

inline

Definition at line3348 of fileInstructions.h.

◆ getDefaultDest()

BasicBlock * llvm::SwitchInst::getDefaultDest

(

)

const

inline

Definition at line3351 of fileInstructions.h.

Referenced byunswitchNontrivialInvariants().

◆ getNumCases()

unsigned llvm::SwitchInst::getNumCases

(

)

const

inline

Return the number of 'cases' in this switch instruction, excluding the default case.

Definition at line3367 of fileInstructions.h.

Referenced byaddCase().

◆ getNumSuccessors()

unsigned llvm::SwitchInst::getNumSuccessors

(

)

const

inline

Definition at line3471 of fileInstructions.h.

◆ getSuccessor()

BasicBlock * llvm::SwitchInst::getSuccessor

(

unsigned

idx

)

const

inline

Definition at line3472 of fileInstructions.h.

Referencesassert().

◆ operator delete()

void llvm::SwitchInst::operator delete

(

void *

Ptr

)

inline

Definition at line3185 of fileInstructions.h.

ReferencesPtr.

◆ removeCase()

SwitchInst::CaseIt SwitchInst::removeCase

(

CaseIt

)

This method removes the specified case and its successor from the switch instruction.

removeCase - This method removes the specified case and its successor from the switch instruction.

Note that this operation may reorder the remaining cases at index idx and above. Note: This action invalidates iterators for all cases following the one removed, including thecase_end() iterator. It returns an iterator for the next case.

Definition at line4026 of fileInstructions.cpp.

Referencesassert(),llvm::User::getNumOperands(),llvm::User::getOperandList(),I,llvm::Use::set(), andllvm::User::setNumHungOffUseOperands().

◆ setCondition()

void llvm::SwitchInst::setCondition

(

Value *

)

inline

Definition at line3349 of fileInstructions.h.

◆ setDefaultDest()

void llvm::SwitchInst::setDefaultDest

(

BasicBlock *

DefaultCase

)

inline

Definition at line3361 of fileInstructions.h.

Referenced byunswitchTrivialSwitch().

◆ setSuccessor()

void llvm::SwitchInst::setSuccessor	(	unsigned	idx,
		BasicBlock *	NewSucc
	)

inline

Definition at line3476 of fileInstructions.h.

Referencesassert().

Friends And Related Function Documentation

◆ Instruction

friend classInstruction

friend

Definition at line3180 of fileInstructions.h.

Member Data Documentation

◆ DefaultPseudoIndex

const unsigned llvm::SwitchInst::DefaultPseudoIndex = static_cast<unsigned>(~0L-1)

static

Definition at line3188 of fileInstructions.h.

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

include/llvm/IR/Instructions.h
lib/IR/Instructions.cpp

Movatterモバイル変換

Classes

Public Types

Public Member Functions

Static Public Member Functions

Static Public Attributes

Protected Member Functions

Friends

Additional Inherited Members

Detailed Description

Member Typedef Documentation

◆ CaseIt

◆ ConstCaseHandle

◆ ConstCaseIt

Member Function Documentation

◆ addCase()

◆ case_begin()[1/2]

◆ case_begin()[2/2]

◆ case_default()[1/2]

◆ case_default()[2/2]

◆ case_end()[1/2]

◆ case_end()[2/2]

◆ cases()[1/2]

◆ cases()[2/2]

◆ classof()[1/2]

◆ classof()[2/2]

◆ cloneImpl()

◆ Create()

◆ DECLARE_TRANSPARENT_OPERAND_ACCESSORS()

◆ defaultDestUndefined()

◆ findCaseDest()

◆ findCaseValue()[1/2]

◆ findCaseValue()[2/2]

◆ getCondition()

◆ getDefaultDest()

◆ getNumCases()

◆ getNumSuccessors()

◆ getSuccessor()

◆ operator delete()

◆ removeCase()

◆ setCondition()

◆ setDefaultDest()

◆ setSuccessor()

Friends And Related Function Documentation

◆ Instruction

Member Data Documentation

◆ DefaultPseudoIndex