LLVM 20.0.0git
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This is the base class for all instructions that perform data casts. More...
#include "llvm/IR/InstrTypes.h"
Public Member Functions | |
bool | isIntegerCast () const |
There are several places where we need to know if a cast instruction only deals with integer source and destination types. | |
bool | isNoopCast (const DataLayout &DL) const |
Determine if this cast is a no-op cast. | |
Instruction::CastOps | getOpcode () const |
Return the opcode of this CastInst. | |
Type * | getSrcTy () const |
Return the source type, as a convenience. | |
Type * | getDestTy () const |
Return the destination type, as a convenience. | |
Public Member Functions inherited from llvm::UnaryInstruction | |
void * | operator new (size_t S) |
void | operator delete (void *Ptr) |
DECLARE_TRANSPARENT_OPERAND_ACCESSORS (Value) | |
Transparently provide more efficient getOperand methods. | |
Public Member Functions inherited from llvm::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 single DbgRecord 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 in Value, 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 instruction. | |
void | insertAfter (Instruction *InsertPos) |
Insert an unlinked instruction into a basic block immediately after the specified instruction. | |
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 | moveBeforePreserving (Instruction *MovePos) |
Perform a moveBefore 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 | moveBeforePreserving (BasicBlock &BB, InstListType::iterator I) |
(See other overload for moveBeforePreserving). | |
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 | moveAfterPreserving (Instruction *MovePos) |
See moveBeforePreserving . | |
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 | 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 | 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 this Instruction. | |
MDNode * | getMetadata (StringRef Kind) const |
Get the metadata of given kind attached to this Instruction. | |
void | getAllMetadata (SmallVectorImpl< std::pair< unsigned, MDNode * > > &MDs) const |
Get all metadata attached to this Instruction. | |
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 the MDNode 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 the AA metadata for this instruction. | |
void | setAAMetadata (const AAMDNodes &N) |
Sets the AA metadata on this instruction from the AAMDNodes 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 a DebugLoc. | |
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 the Instruction. | |
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 the DIAssignID 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 a DbgInfoIntrinsic or PseudoProbeInst. | |
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) 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) 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=std::nullopt) |
Drop all unknown metadata except for debug locations. | |
Public Member Functions inherited from llvm::User | |
User (const User &)=delete | |
void | operator delete (void *Usr) |
Free memory allocated for User and Use objects. | |
void | operator delete (void *Usr, unsigned) |
Placement delete - required by std, called if the ctor throws. | |
void | operator delete (void *Usr, unsigned, unsigned) |
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 this User instance. | |
MutableArrayRef< uint8_t > | getDescriptor () |
Returns the descriptor co-allocated with this User instance. | |
void | setGlobalVariableNumOperands (unsigned NumOps) |
Set the number of operands on a GlobalVariable. | |
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 one Value with another. | |
Public Member Functions inherited from llvm::Value | |
Value (const Value &)=delete | |
Value & | operator= (const Value &)=delete |
void | deleteValue () |
Delete a pointer to a generic Value. | |
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 new Value. | |
void | replaceNonMetadataUsesWith (Value *V) |
Change non-metadata uses of this to point to a new Value. | |
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 given Use. | |
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 this Value 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 *) { return true;}) |
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 this Value. | |
void | addUse (Use &U) |
This method should only be used by the Use 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) |
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 this Value 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<< on Value. | |
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 this Value out to the specified raw_ostream. | |
void | printAsOperand (raw_ostream &O, bool PrintType, ModuleSlotTracker &MST) const |
Public Member Functions inherited from llvm::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 from llvm::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 from llvm::ilist_detail::node_parent_access< NodeTy, ParentTy > | |
const ParentTy * | getParent () const |
ParentTy * | getParent () |
void | setParent (ParentTy *Parent) |
Static Public Member Functions | |
static CastInst * | Create (Instruction::CastOps, Value *S, Type *Ty, const Twine &Name="", InsertPosition InsertBefore=nullptr) |
Provides a way to construct any of the CastInst subclasses using an opcode instead of the subclass's constructor. | |
static CastInst * | CreateZExtOrBitCast (Value *S, Type *Ty, const Twine &Name="", InsertPosition InsertBefore=nullptr) |
Create a ZExt or BitCast cast instruction. | |
static CastInst * | CreateSExtOrBitCast (Value *S, Type *Ty, const Twine &Name="", InsertPosition InsertBefore=nullptr) |
Create a SExt or BitCast cast instruction. | |
static CastInst * | CreatePointerCast (Value *S, Type *Ty, const Twine &Name="", InsertPosition InsertBefore=nullptr) |
Create a BitCast, AddrSpaceCast or a PtrToInt cast instruction. | |
static CastInst * | CreatePointerBitCastOrAddrSpaceCast (Value *S, Type *Ty, const Twine &Name="", InsertPosition InsertBefore=nullptr) |
Create a BitCast or an AddrSpaceCast cast instruction. | |
static CastInst * | CreateBitOrPointerCast (Value *S, Type *Ty, const Twine &Name="", InsertPosition InsertBefore=nullptr) |
Create a BitCast, a PtrToInt, or an IntToPTr cast instruction. | |
static CastInst * | CreateIntegerCast (Value *S, Type *Ty, bool isSigned, const Twine &Name="", InsertPosition InsertBefore=nullptr) |
Create a ZExt, BitCast, or Trunc for int -> int casts. | |
static CastInst * | CreateFPCast (Value *S, Type *Ty, const Twine &Name="", InsertPosition InsertBefore=nullptr) |
Create an FPExt, BitCast, or FPTrunc for fp -> fp casts. | |
static CastInst * | CreateTruncOrBitCast (Value *S, Type *Ty, const Twine &Name="", InsertPosition InsertBefore=nullptr) |
Create a Trunc or BitCast cast instruction. | |
static bool | isBitCastable (Type *SrcTy, Type *DestTy) |
Check whether a bitcast between these types is valid. | |
static bool | isBitOrNoopPointerCastable (Type *SrcTy, Type *DestTy, const DataLayout &DL) |
Check whether a bitcast, inttoptr, or ptrtoint cast between these types is valid and a no-op. | |
static Instruction::CastOps | getCastOpcode (const Value *Val, bool SrcIsSigned, Type *Ty, bool DstIsSigned) |
Returns the opcode necessary to cast Val into Ty using usual casting rules. | |
static bool | isNoopCast (Instruction::CastOps Opcode, Type *SrcTy, Type *DstTy, const DataLayout &DL) |
A no-op cast is one that can be effected without changing any bits. | |
static unsigned | isEliminableCastPair (Instruction::CastOps firstOpcode, Instruction::CastOps secondOpcode, Type *SrcTy, Type *MidTy, Type *DstTy, Type *SrcIntPtrTy, Type *MidIntPtrTy, Type *DstIntPtrTy) |
Determine how a pair of casts can be eliminated, if they can be at all. | |
static bool | castIsValid (Instruction::CastOps op, Type *SrcTy, Type *DstTy) |
This method can be used to determine if a cast from SrcTy to DstTy using Opcode op is valid or not. | |
static bool | castIsValid (Instruction::CastOps op, Value *S, Type *DstTy) |
static bool | classof (const Instruction *I) |
Methods for support type inquiry through isa, cast, and dyn_cast: | |
static bool | classof (const Value *V) |
Static Public Member Functions inherited from llvm::UnaryInstruction | |
static bool | classof (const Instruction *I) |
static bool | classof (const Value *V) |
Static Public Member Functions inherited from llvm::Instruction | |
static const char * | getOpcodeName (unsigned Opcode) |
static bool | isTerminator (unsigned Opcode) |
static bool | isUnaryOp (unsigned Opcode) |
static bool | isBinaryOp (unsigned Opcode) |
static bool | isIntDivRem (unsigned Opcode) |
static bool | isShift (unsigned Opcode) |
Determine if the Opcode is one of the shift instructions. | |
static bool | isBitwiseLogicOp (unsigned Opcode) |
Determine if the Opcode is and/or/xor. | |
static bool | isCast (unsigned Opcode) |
Determine if the Opcode is one of the CastInst instructions. | |
static bool | isFuncletPad (unsigned Opcode) |
Determine if the Opcode is one of the FuncletPadInst instructions. | |
static bool | isSpecialTerminator (unsigned Opcode) |
Returns true if the Opcode is a "special" terminator that does more than branch to a successor (e.g. | |
static bool | isAssociative (unsigned Opcode) |
static bool | isCommutative (unsigned Opcode) |
static bool | isIdempotent (unsigned Opcode) |
static bool | isNilpotent (unsigned Opcode) |
static bool | classof (const Value *V) |
Methods for support type inquiry through isa, cast, and dyn_cast: | |
Static Public Member Functions inherited from llvm::User | |
static bool | classof (const Value *V) |
Static Public Member Functions inherited from llvm::Value | |
static void | dropDroppableUse (Use &U) |
Remove the droppable use U . | |
Protected Member Functions | |
CastInst (Type *Ty, unsigned iType, Value *S, const Twine &NameStr="", InsertPosition InsertBefore=nullptr) | |
Constructor with insert-before-instruction semantics for subclasses. | |
Protected Member Functions inherited from llvm::UnaryInstruction | |
UnaryInstruction (Type *Ty, unsigned iType, Value *V, BasicBlock::iterator IB) | |
UnaryInstruction (Type *Ty, unsigned iType, Value *V, Instruction *IB=nullptr) | |
UnaryInstruction (Type *Ty, unsigned iType, Value *V, BasicBlock *IAE) | |
Protected Member Functions inherited from llvm::Instruction | |
~Instruction () | |
template<typename BitfieldElement > | |
BitfieldElement::Type | getSubclassData () const |
template<typename BitfieldElement > | |
void | setSubclassData (typename BitfieldElement::Type Value) |
Instruction (Type *Ty, unsigned iType, Use *Ops, unsigned NumOps, InsertPosition InsertBefore=nullptr) | |
Protected Member Functions inherited from llvm::User | |
void * | operator new (size_t Size) |
Allocate a User with an operand pointer co-allocated. | |
void * | operator new (size_t Size, unsigned Us) |
Allocate a User with the operands co-allocated. | |
void * | operator new (size_t Size, unsigned Us, unsigned DescBytes) |
Allocate a User with the operands co-allocated. | |
User (Type *ty, unsigned vty, Use *, unsigned NumOps) | |
void | allocHungoffUses (unsigned N, bool IsPhi=false) |
Allocate the array of Uses, followed by a pointer (with bottom bit set) to the User. | |
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 from llvm::Value | |
Value (Type *Ty, unsigned scid) | |
~Value () | |
Value's destructor should be virtual by design, but that would require that Value 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 this Value. | |
MDNode * | getMetadataImpl (unsigned KindID) const |
Get metadata for the given kind, if any. | |
unsigned short | getSubclassDataFromValue () const |
void | setValueSubclassData (unsigned short D) |
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 from llvm::ilist_node_with_parent< Instruction, BasicBlock, ilist_iterator_bits< true >, ilist_parent< BasicBlock > > | |
ilist_node_with_parent ()=default | |
Protected Member Functions inherited from llvm::ilist_node_impl< ilist_detail::compute_node_options< T, Options... >::type > | |
ilist_node_impl ()=default | |
Additional Inherited Members | |
Public Types inherited from llvm::Instruction | |
enum | OperationEquivalenceFlags { CompareIgnoringAlignment = 1<<0 , CompareUsingScalarTypes = 1<<1 } |
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 from llvm::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 from llvm::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 Attributes inherited from llvm::Instruction | |
DbgMarker * | DebugMarker = nullptr |
Optional marker recording the position for debugging information that takes effect immediately before this instruction. | |
Static Public Attributes inherited from llvm::Value | |
static constexpr unsigned | MaxAlignmentExponent = 32 |
The maximum alignment for instructions. | |
static constexpr uint64_t | MaximumAlignment = 1ULL << MaxAlignmentExponent |
Protected Types inherited from llvm::Instruction | |
using | OpaqueField = Bitfield::Element< uint16_t, 0, 15 > |
template<unsigned Offset> | |
using | AlignmentBitfieldElementT = typename Bitfield::Element< unsigned, Offset, 6, Value::MaxAlignmentExponent > |
template<unsigned Offset> | |
using | BoolBitfieldElementT = typename Bitfield::Element< bool, Offset, 1 > |
template<unsigned Offset> | |
using | AtomicOrderingBitfieldElementT = typename Bitfield::Element< AtomicOrdering, Offset, 3, AtomicOrdering::LAST > |
Protected Types inherited from llvm::Value | |
enum | : unsigned { NumUserOperandsBits = 27 } |
The number of operands in the subclass. More... | |
Protected Types inherited from llvm::ilist_node_impl< ilist_detail::compute_node_options< T, Options... >::type > | |
using | self_iterator = typename ilist_select_iterator_type< OptionsT::has_iterator_bits, ilist_detail::compute_node_options< T, Options... >::type, false, false >::type |
using | const_self_iterator = typename ilist_select_iterator_type< OptionsT::has_iterator_bits, ilist_detail::compute_node_options< T, Options... >::type, false, true >::type |
using | reverse_self_iterator = typename ilist_select_iterator_type< OptionsT::has_iterator_bits, ilist_detail::compute_node_options< T, Options... >::type, true, false >::type |
using | const_reverse_self_iterator = typename ilist_select_iterator_type< OptionsT::has_iterator_bits, ilist_detail::compute_node_options< T, Options... >::type, true, true >::type |
Static Protected Member Functions inherited from llvm::User | |
template<int Idx, typename U > | |
static Use & | OpFrom (const U *that) |
Protected Attributes inherited from llvm::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 |
This is the base class for all instructions that perform data casts.
It is simply provided so that instruction category testing can be performed with code like:
if (isa<CastInst>(Instr)) { ... } Base class of casting instructions.
Definition at line 530 of file InstrTypes.h.
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Constructor with insert-before-instruction semantics for subclasses.
Definition at line 533 of file InstrTypes.h.
References llvm::Value::setName().
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This method can be used to determine if a cast from SrcTy to DstTy using Opcode op is valid or not.
Check that the construction parameters for a CastInst are correct.
This could be broken out into the separate constructors but it is useful to have it in one place and to eliminate the redundant code for getting the sizes of the types involved.
Definition at line 3242 of file Instructions.cpp.
References llvm::PointerType::getAddressSpace(), llvm::ElementCount::getFixed(), llvm::Type::getPrimitiveSizeInBits(), llvm::Type::getScalarSizeInBits(), llvm::Type::getScalarType(), llvm::Type::isAggregateType(), llvm::Type::isFirstClassType(), llvm::Type::isFPOrFPVectorTy(), llvm::Type::isIntOrIntVectorTy(), llvm::Type::isPtrOrPtrVectorTy(), and op.
Referenced by llvm::AddrSpaceCastInst::AddrSpaceCastInst(), llvm::BitCastInst::BitCastInst(), castIsValid(), llvm::ConstantFoldLoadThroughBitcast(), Create(), llvm::FPExtInst::FPExtInst(), llvm::FPToSIInst::FPToSIInst(), llvm::FPToUIInst::FPToUIInst(), llvm::FPTruncInst::FPTruncInst(), llvm::ConstantExpr::getAddrSpaceCast(), llvm::ConstantExpr::getBitCast(), llvm::ConstantExpr::getCast(), llvm::IntToPtrInst::IntToPtrInst(), isNoopCast(), llvm::PtrToIntInst::PtrToIntInst(), llvm::SExtInst::SExtInst(), llvm::SIToFPInst::SIToFPInst(), llvm::TruncInst::TruncInst(), llvm::UIToFPInst::UIToFPInst(), llvm::UpgradeARCRuntime(), and llvm::ZExtInst::ZExtInst().
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Definition at line 708 of file InstrTypes.h.
References castIsValid(), llvm::Value::getType(), and op.
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Methods for support type inquiry through isa, cast, and dyn_cast:
Definition at line 713 of file InstrTypes.h.
References I.
Referenced by classof().
Definition at line 716 of file InstrTypes.h.
References classof().
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Provides a way to construct any of the CastInst subclasses using an opcode instead of the subclass's constructor.
The opcode must be in the CastOps category (Instruction::isCast(opcode) returns true). This constructor has insert-before-instruction semantics to automatically insert the new CastInst before InsertBefore (if it is non-null). Construct any of the CastInst subclasses
op | The opcode of the cast instruction |
S | The value to be casted (operand 0) |
Ty | The type to which cast should be made |
Name | Name for the instruction |
InsertBefore | Place to insert the instruction |
Definition at line 2973 of file Instructions.cpp.
References assert(), castIsValid(), llvm_unreachable, Name, and op.
Referenced by canonicalizeBitCastExtElt(), llvm::InstCombinerImpl::commonCastTransforms(), llvm::InstCombinerImpl::commonShiftTransforms(), CreateBitOrPointerCast(), llvm::IRBuilderBase::CreateCast(), CreateFPCast(), CreateIntegerCast(), CreatePointerBitCastOrAddrSpaceCast(), CreatePointerCast(), CreateSExtOrBitCast(), llvm::IRBuilderBase::CreateTrunc(), CreateTruncOrBitCast(), CreateZExtOrBitCast(), llvm::InstCombinerImpl::EvaluateInDifferentType(), llvm::InstCombinerImpl::foldAddWithConstant(), foldCastShuffle(), foldCtpop(), llvm::InstCombinerImpl::foldPHIArgOpIntoPHI(), llvm::InstCombinerImpl::foldSelectOpOp(), llvm::InstCombinerImpl::FoldShiftByConstant(), llvm::ConstantExpr::getAsInstruction(), llvm::PPCTTIImpl::instCombineIntrinsic(), narrowInsElt(), processSIToFP(), llvm::InstCombinerImpl::reassociateShiftAmtsOfTwoSameDirectionShifts(), llvm::replaceSignedInst(), simplifyNvvmIntrinsic(), SinkShiftAndTruncate(), llvm::UpgradeBitCastInst(), llvm::InstCombinerImpl::visitBitCast(), llvm::InstCombinerImpl::visitCallInst(), llvm::InstCombinerImpl::visitExtractElementInst(), llvm::InstCombinerImpl::visitFPExt(), llvm::InstCombinerImpl::visitFPTrunc(), llvm::InstCombinerImpl::visitMul(), llvm::InstCombinerImpl::visitSExt(), llvm::InstCombinerImpl::visitShuffleVectorInst(), and llvm::InstCombinerImpl::visitSIToFP().
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Create a BitCast, a PtrToInt, or an IntToPTr cast instruction.
If the value is a pointer type and the destination an integer type, creates a PtrToInt cast. If the value is an integer type and the destination a pointer type, creates an IntToPtr cast. Otherwise, creates a bitcast.
S | The pointer value to be casted (operand 0) |
Ty | The type to which cast should be made |
Name | Name for the instruction |
InsertBefore | Place to insert the instruction |
Definition at line 3048 of file Instructions.cpp.
References Create(), llvm::Value::getType(), llvm::Type::isIntegerTy(), llvm::Type::isPointerTy(), and Name.
Referenced by createRetBitCast(), createWrapper(), foldBitCastBitwiseLogic(), llvm::InstCombinerImpl::foldIntegerTypedPHI(), llvm::promoteCall(), and llvm::JumpThreadingPass::simplifyPartiallyRedundantLoad().
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Create an FPExt, BitCast, or FPTrunc for fp -> fp casts.
S | The floating point value to be casted |
Ty | The floating point type to cast to |
Name | Name for the instruction |
InsertBefore | Place to insert the instruction |
Definition at line 3073 of file Instructions.cpp.
References assert(), llvm::CallingConv::C, Create(), llvm::Type::getScalarSizeInBits(), llvm::Type::isFPOrFPVectorTy(), and Name.
Referenced by llvm::InstCombinerImpl::visitFPTrunc().
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Create a ZExt, BitCast, or Trunc for int -> int casts.
S | The pointer value to be casted (operand 0) |
Ty | The type to which cast should be made |
isSigned | Whether to regard S as signed or not |
Name | Name for the instruction |
InsertBefore | Place to insert the instruction |
Definition at line 3059 of file Instructions.cpp.
References assert(), llvm::CallingConv::C, Create(), llvm::Type::getScalarSizeInBits(), llvm::Type::isIntOrIntVectorTy(), isSigned(), and Name.
Referenced by llvm::InstCombinerImpl::EvaluateInDifferentType(), llvm::recognizeBSwapOrBitReverseIdiom(), llvm::InstCombinerImpl::visitCallInst(), llvm::InstCombinerImpl::visitPtrToInt(), llvm::InstCombinerImpl::visitSExt(), and llvm::InstCombinerImpl::visitTrunc().
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Create a BitCast or an AddrSpaceCast cast instruction.
S | The pointer value to be casted (operand 0) |
Ty | The type to which cast should be made |
Name | Name for the instruction |
InsertBefore | Place to insert the instruction |
Definition at line 3037 of file Instructions.cpp.
References assert(), Create(), llvm::Type::getPointerAddressSpace(), llvm::Value::getType(), llvm::Type::isPtrOrPtrVectorTy(), and Name.
Referenced by llvm::NoFolder::CreatePointerBitCastOrAddrSpaceCast(), llvm::IRBuilderBase::CreatePointerBitCastOrAddrSpaceCast(), and CreatePointerCast().
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Create a BitCast, AddrSpaceCast or a PtrToInt cast instruction.
Create a BitCast or a PtrToInt cast instruction.
S | The pointer value to be casted (operand 0) |
Ty | The type to which cast should be made |
Name | Name for the instruction |
InsertBefore | Place to insert the instruction |
Definition at line 3020 of file Instructions.cpp.
References assert(), Create(), CreatePointerBitCastOrAddrSpaceCast(), llvm::Value::getType(), llvm::Type::isIntOrIntVectorTy(), llvm::Type::isPtrOrPtrVectorTy(), llvm::Type::isVectorTy(), and Name.
Referenced by llvm::NoFolder::CreatePointerCast(), llvm::IRBuilderBase::CreatePointerCast(), llvm::CodeExtractor::findAllocas(), runImpl(), and llvm::InstCombinerImpl::visitPHINode().
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Create a SExt or BitCast cast instruction.
S | The value to be casted (operand 0) |
Ty | The type to which cast should be made |
Name | Name for the instruction |
InsertBefore | Place to insert the instruction |
Definition at line 3005 of file Instructions.cpp.
References Create(), llvm::Type::getScalarSizeInBits(), llvm::Value::getType(), and Name.
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Create a Trunc or BitCast cast instruction.
S | The value to be casted (operand 0) |
Ty | The type to which cast should be made |
Name | Name for the instruction |
InsertBefore | Place to insert the instruction |
Definition at line 3012 of file Instructions.cpp.
References Create(), llvm::Type::getScalarSizeInBits(), llvm::Value::getType(), and Name.
Referenced by llvm::InstCombinerImpl::canonicalizeCondSignextOfHighBitExtractToSignextHighBitExtract(), and llvm::InstCombinerImpl::foldVariableSignZeroExtensionOfVariableHighBitExtract().
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Create a ZExt or BitCast cast instruction.
S | The value to be casted (operand 0) |
Ty | The type to which cast should be made |
Name | Name for the instruction |
InsertBefore | Place to insert the instruction |
Definition at line 2998 of file Instructions.cpp.
References Create(), llvm::Type::getScalarSizeInBits(), llvm::Value::getType(), and Name.
Referenced by llvm::InstCombinerImpl::foldPHIArgZextsIntoPHI(), processSExt(), llvm::InstCombinerImpl::visitUDiv(), and llvm::InstCombinerImpl::visitURem().
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Returns the opcode necessary to cast Val into Ty using usual casting rules.
Infer the opcode for cast operand and type
Val | The value to cast |
SrcIsSigned | Whether to treat the source as signed |
Ty | The Type to which the value should be casted |
DstIsSigned | Whether to treate the dest. as signed |
Definition at line 3145 of file Instructions.cpp.
References assert(), llvm::Type::getPointerAddressSpace(), llvm::Type::getPrimitiveSizeInBits(), llvm::Type::isFirstClassType(), llvm::Type::isFloatingPointTy(), llvm::Type::isIntegerTy(), llvm::Type::isPointerTy(), llvm::Type::isVectorTy(), and llvm_unreachable.
Referenced by LLVMGetCastOpcode().
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Return the destination type, as a convenience.
Definition at line 701 of file InstrTypes.h.
References llvm::Value::getType().
Referenced by constantFoldUser().
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Return the opcode of this CastInst.
Definition at line 694 of file InstrTypes.h.
References llvm::Instruction::getOpcode().
Referenced by llvm::AddrSpaceCastInst::AddrSpaceCastInst(), llvm::BitCastInst::BitCastInst(), llvm::InstCombinerImpl::commonCastTransforms(), constantFoldUser(), llvm::FPExtInst::FPExtInst(), llvm::FPToSIInst::FPToSIInst(), llvm::FPToUIInst::FPToUIInst(), llvm::FPTruncInst::FPTruncInst(), llvm::IntToPtrInst::IntToPtrInst(), isIntegerCast(), isNoopCast(), llvm::PtrToIntInst::PtrToIntInst(), llvm::SExtInst::SExtInst(), shrinkInsertElt(), llvm::SIToFPInst::SIToFPInst(), llvm::TruncInst::TruncInst(), llvm::UIToFPInst::UIToFPInst(), visitIVCast(), llvm::VPWidenCastRecipe::VPWidenCastRecipe(), and llvm::ZExtInst::ZExtInst().
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Return the source type, as a convenience.
Definition at line 699 of file InstrTypes.h.
References llvm::User::getOperand(), and llvm::Value::getType().
Referenced by llvm::InstCombinerImpl::commonCastTransforms(), foldLogicCastConstant(), and llvm::InstCombinerImpl::visitFPTrunc().
Check whether a bitcast between these types is valid.
SrcTy | The Type from which the value should be cast. |
DestTy | The Type to which the value should be cast. |
Definition at line 3086 of file Instructions.cpp.
References llvm::details::FixedOrScalableQuantity< LeafTy, ValueTy >::getKnownMinValue(), llvm::Type::getPrimitiveSizeInBits(), and llvm::Type::isFirstClassType().
Referenced by llvm::coro::Shape::buildFrom(), and isBitOrNoopPointerCastable().
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Check whether a bitcast, inttoptr, or ptrtoint cast between these types is valid and a no-op.
This ensures that any pointer<->integer cast has enough bits in the integer and any other cast is a bitcast.
SrcTy | The Type from which the value should be cast. |
DestTy | The Type to which the value should be cast. |
Definition at line 3123 of file Instructions.cpp.
References DL, and isBitCastable().
Referenced by createBitOrPointerCast(), createWrapper(), getAvailableLoadStore(), llvm::isLegalToPromote(), isSupportedAccessType(), and llvm::InstCombinerImpl::mergeStoreIntoSuccessor().
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Determine how a pair of casts can be eliminated, if they can be at all.
This function determines if a pair of casts can be eliminated and what opcode should be used in the elimination.
This is a helper function for both CastInst and ConstantExpr.
This assumes that there are two instructions like this:
firstOp | Opcode of first cast |
secondOp | Opcode of second cast |
SrcTy | SrcTy of 1st cast |
MidTy | DstTy of 1st cast & SrcTy of 2nd cast |
DstTy | DstTy of 2nd cast |
SrcIntPtrTy | Integer type corresponding to Ptr SrcTy, or null |
MidIntPtrTy | Integer type corresponding to Ptr MidTy, or null |
DstIntPtrTy | Integer type corresponding to Ptr DstTy, or null |
Definition at line 2760 of file Instructions.cpp.
References assert(), DisableI2pP2iOpt, llvm::Type::getPointerAddressSpace(), llvm::Type::getScalarSizeInBits(), llvm::Type::isIntegerTy(), llvm::Type::isIntOrIntVectorTy(), llvm::Type::isPtrOrPtrVectorTy(), llvm::Type::isVectorTy(), and llvm_unreachable.
Referenced by foldConstantCastPair(), and simplifyCastInst().
bool CastInst::isIntegerCast | ( | ) | const |
There are several places where we need to know if a cast instruction only deals with integer source and destination types.
To simplify that logic, this method is provided.
Definition at line 2697 of file Instructions.cpp.
References getOpcode(), llvm::User::getOperand(), llvm::Value::getType(), and llvm::Type::isIntegerTy().
bool CastInst::isNoopCast | ( | const DataLayout & | DL | ) | const |
Determine if this cast is a no-op cast.
DL | is the DataLayout to determine pointer size. |
Definition at line 2748 of file Instructions.cpp.
References DL, getOpcode(), llvm::User::getOperand(), llvm::Value::getType(), and isNoopCast().
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static |
A no-op cast is one that can be effected without changing any bits.
This function determines if the CastInst does not require any bits to be changed in order to effect the cast.
It implies that the source and destination types are the same size. The DataLayout argument is to determine the pointer size when examining casts involving Integer and Pointer types. They are no-op casts if the integer is the same size as the pointer. However, pointer size varies with platform. Note that a precondition of this method is that the cast is legal - i.e. the instruction formed with these operands would verify.
Essentially, it identifies cases where no code gen is necessary for the cast, hence the name no-op cast. For example, the following are all no-op casts:
Determine if the described cast is a no-op.
Opcode | Opcode of cast |
SrcTy | SrcTy of cast |
DestTy | DstTy of cast |
DL | DataLayout to get the Int Ptr type from. |
Definition at line 2718 of file Instructions.cpp.
References assert(), castIsValid(), DL, llvm::Type::getScalarSizeInBits(), and llvm_unreachable.
Referenced by isNoopCast(), and isNoopPtrIntCastPair().