Utility class for integer operators which may exhibit overflow ‐ Add, Sub, Mul, and Shl. It does not include SDiv, despite that operator having the potential for overflow.
Synopsis
Declared in <llvm/IR/Operator.h>
class OverflowingBinaryOperator
: public OperatorBase Classes
Name |
Description |
This is a utility class that provides an abstraction for the common functionality between Instructions and ConstantExprs. |
Types
Name |
Description |
Iterator for directly iterating over the operand Values. |
Type Aliases
Enums
Name |
Description |
Concrete subclass of this. |
Member Functions
Name |
Description |
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Copy assignment operator |
Translate PHI node to its predecessor from the given basic block. |
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This method should only be used by the Use class. |
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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. E.g. deallocation after the static scope of a value does not count, but a deallocation before that does. |
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Delete a pointer to a generic Value. |
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Drop all references to operands. |
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Remove every uses that can safely be removed. |
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Remove every use of this value in |
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Support for debugging, callable in GDB: V‐>dump() |
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All values hold a context through their type. |
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Returns the descriptor co‐allocated with this User instance. |
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Return a constant reference to the value's name. |
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Returns the no‐wrap kind of the operation. |
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Transparently provide more efficient getOperand methods. |
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This method computes the number of uses of this Value. |
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Return the opcode for this Instruction or ConstantExpr. |
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Transparently provide more efficient getOperand methods. |
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Returns an alignment of the pointer value. |
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Returns the number of bytes known to be dereferenceable for the pointer value. |
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If this ptr is provably equal to |
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Return the raw optional flags value contained in this value. |
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Return true if there is exactly one use of this value that cannot be dropped. |
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All values are typed, get the type of this value. |
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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). |
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Return an ID for the concrete type of this object. |
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Return true if there this value. |
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Return true if this value has N uses or more. |
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Return true if this Value has exactly N uses. |
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Return true if this value has N uses or more. |
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Test whether this operation is known to never undergo signed overflow, aka the nsw property. |
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Test whether this operation is known to never undergo unsigned overflow, aka the nuw property. |
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Return true if there is exactly one use of this value. |
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Return true if there is exactly one user of this value. |
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Return true if this operator has poison‐generating flags, return attributes or metadata. The latter two is only possible for instructions. |
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Return true if this operator has flags which may cause this operator to evaluate to poison despite having non‐poison inputs. |
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Check if this Value has a use‐list. |
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Return true if there is a value handle associated with this value. |
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Return true if the instruction is commutative |
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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. |
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Return true if this value is a swifterror value. |
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Return true if there is metadata referencing this value. |
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Check if this value is used in the specified basic block. |
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Mutate the type of this Value to be of the specified type. |
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Transparently provide more efficient getOperand methods. |
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Transparently provide more efficient getOperand methods. |
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Delete operators |
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Implement operator<< on Value. @{ |
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Print the name of this Value out to the specified raw_ostream. |
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Change all uses of this to point to a new Value. |
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Change non‐metadata uses of this to point to a new Value. |
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Replace uses of one Value with another. |
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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. 'This's use list is expected to have at least one element. Unlike replaceAllUsesWith() this function does not support basic block values. |
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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. Unlike replaceAllUsesWith() this function does not support basic block values. Returns whether any uses have been replaced. |
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Reverse the use‐list. |
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Change the name of the value. |
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Subclasses with hung off uses need to manage the operand count themselves. In these instances, the operand count isn't used to find the OperandList, so there's no issue in having the operand count change. |
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Transparently provide more efficient getOperand methods. |
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Sort the use‐list. |
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Accumulate the constant offset this value has compared to a base pointer. Only 'getelementptr' instructions (GEPs) are accumulated but other instructions, e.g., casts, are stripped away as well. The accumulated constant offset is added to |
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This is a wrapper around stripAndAccumulateConstantOffsets with the in‐bounds requirement set to false. |
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Strip off pointer casts and all‐constant inbounds GEPs. |
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Strip off pointer casts and inbounds GEPs. |
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Strip off pointer casts, all‐zero GEPs and address space casts. |
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Strip off pointer casts, all‐zero GEPs, address space casts, and aliases. |
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Strip off pointer casts, all‐zero GEPs, single‐argument phi nodes and invariant group info. |
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Strip off pointer casts, all‐zero GEPs and address space casts but ensures the representation of the result stays the same. |
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Transfer the name from V to this value. |
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Static Member Functions
Name |
Description |
Remove the droppable use |
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If V is an Instruction or ConstantExpr, return its opcode. Otherwise return UserOp1. |
Static Data Members
Name |
Description |
The maximum alignment for instructions. |
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Protected Types
Name |
Description |
Information about how a User object was allocated, to be passed into the User constructor. |
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Indicates this User has operands "hung off" in another allocation. |
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Indicates this User has operands co‐allocated. |
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Indicates this User has operands and a descriptor co‐allocated . |
Protected Enums
Name |
Description |
The number of operands in the subclass. |
Protected Member Functions
Name |
Description |
Transparently provide more efficient getOperand methods. |
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Add a metadata attachment. @{ |
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Allocate the array of Uses, followed by a pointer (with bottom bit set) to the User. |
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Erase all metadata attached to this Value. |
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Erase all metadata attachments with the given kind. |
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Erase all metadata attachments matching the given predicate. |
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Appends all metadata attached to this value to |
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Get the current metadata attachments for the given kind, if any. |
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Get metadata for the given kind, if any. This is an internal function that must only be called after checking that |
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Grow the number of hung off uses. Note that allocHungoffUses should be called if there are no uses. |
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New operators |
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Set a particular kind of metadata attachment. |
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Protected Static Member Functions
Name |
Protected Data Members
Name |
Description |
Hold arbitary subclass data. |
Friends
Name |
Description |
A constant value that is initialized with an expression using other constant values. |
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Non-Member Functions
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Description |
Get the upper bound on bit size for this Value |
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Return the number of times the sign bit of the register is replicated into the other bits. We know that at least 1 bit is always equal to the sign bit (itself), but other cases can give us information. For example, immediately after an "ashr X, 2", we know that the top 3 bits are all equal to each other, so we return 3. For vectors, return the number of sign bits for the vector element with the mininum number of known sign bits. |
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ExtractTypeInfo ‐ Returns the type info, possibly bitcast, encoded in V. |
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Given an aggregate and an sequence of indices, see if the scalar value indexed is already around as a register, for example if it were inserted directly into the aggregate. |
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Analyze the specified pointer to see if it can be expressed as a base pointer plus a constant offset. Return the base and offset to the caller. |
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If we can compute the length of the string pointed to by the specified pointer, return 'len+1'. If we can't, return 0. |
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Look up or compute a value in the value map. |
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Return true if 'V & Mask' is known to be zero. We use this predicate to simplify operations downstream. Mask is known to be zero for bits that V cannot have. |
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PointerMayBeCaptured ‐ Visit the value and the values derived from it and find values which appear to be capturing the pointer value. This feeds results into and is controlled by the CaptureTracker object. MaxUsesToExplore specifies how many uses the analysis should explore for one value before giving up due too "too many uses". If MaxUsesToExplore is zero, a default value is assumed. This function only considers captures of the passed value via its def‐use chain, without considering captures of values it may be based on, or implicit captures such as for external globals. |
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Return which components of the pointer may be captured. Only consider components that are part of |
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PointerMayBeCaptured ‐ Return true if this pointer value may be captured by the enclosing function (which is required to exist). This routine can be expensive, so consider caching the results. The boolean ReturnCaptures specifies whether returning the value (or part of it) from the function counts as capturing it or not. MaxUsesToExplore specifies how many uses the analysis should explore for one value before giving up due too "too many uses". If MaxUsesToExplore is zero, a default value is assumed. This function only considers captures of the passed value via its def‐use chain, without considering captures of values it may be based on, or implicit captures such as for external globals. |
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PointerMayBeCapturedBefore ‐ Return true if this pointer value may be captured by the enclosing function (which is required to exist). If a DominatorTree is provided, only captures which happen before the given instruction are considered. This routine can be expensive, so consider caching the results. The boolean ReturnCaptures specifies whether returning the value (or part of it) from the function counts as capturing it or not. Captures by the provided instruction are considered if the final parameter is true. MaxUsesToExplore specifies how many uses the analysis should explore for one value before giving up due too "too many uses". If MaxUsesToExplore is zero, a default value is assumed. This function only considers captures of the passed value via its def‐use chain, without considering captures of values it may be based on, or implicit captures such as for external globals. |
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Return which components of the pointer may be captured on the path to |
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If the specified value is a trivially dead instruction, delete it. If that makes any of its operands trivially dead, delete them too, recursively. Return true if any instructions were deleted. |
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Utility function for performing a given action on each lane of a vector with |
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Similar to SplitBlockAndInsertIfThen, but the inserted block is on the false path of the branch. |
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Split the containing block at the specified instruction ‐ everything before SplitBefore stays in the old basic block, and the rest of the instructions in the BB are moved to a new block. The two blocks are connected by a conditional branch (with value of Cmp being the condition). Before: Head SplitBefore Tail After: Head if (Cond) ThenBlock SplitBefore Tail |
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Split the containing block at the specified instruction ‐ everything before SplitBefore stays in the old basic block, and the rest of the instructions in the BB are moved to a new block. The two blocks are connected by a conditional branch (with value of Cmp being the condition). Before: Head SplitBefore Tail After: Head if (Cond) TrueBlock else/ FalseBlock SplitBefore Tail |
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SplitBlockAndInsertIfThenElse is similar to SplitBlockAndInsertIfThen, but also creates the ElseBlock. Before: Head SplitBefore Tail After: Head if (Cond) ThenBlock else ElseBlock SplitBefore Tail |
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Insert a for (int i = 0; i < End; i++) loop structure (with the exception that |
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Using KnownBits LHS/RHS produce the known bits for logic op (and/xor/or). |
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canCreateUndefOrPoison returns true if Op can create undef or poison from non‐undef & non‐poison operands. For vectors, canCreateUndefOrPoison returns true if there is potential poison or undef in any element of the result when vectors without undef/poison poison are given as operands. For example, given |
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Returns true if a pointer value |
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Return true if we can prove that the specified FP value is never equal to ‐0.0. Users should use caution when considering PreserveSign denormal‐fp‐math. |
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Return true if we can prove that the specified FP value is either NaN or never less than ‐0.0. |
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See if the given exception handling personality function is one that we understand. If so, return a description of it; otherwise return Unknown. |
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Enumerates all possible immediate values of V and inserts them into the set |
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Determine the possible constant range of an integer or vector of integer value. This is intended as a cheap, non‐recursive check. |
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Returns the known bits rather than passing by reference. |
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Determine which bits of V are known to be either zero or one and return them in the KnownZero/KnownOne bit sets. |
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Returns the known bits rather than passing by reference. |
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Merge bits known from context‐dependent facts into Known. |
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Wrapper to account for known fast math flags at the use instruction. |
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Return false if we can prove that the specified FP value's sign bit is 0. Return true if we can prove that the specified FP value's sign bit is 1. Otherwise return std::nullopt. |
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Decompose an icmp into the form ((X & Mask) pred C) if possible. Unless |
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Decompose an icmp into the form ((X & Mask) pred C) if possible. Unless |
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Emit a call to the bcmp function. |
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Emit a call to the binary function named 'Name' (e.g. 'fmin'). This function is known to take type matching 'Op1' and 'Op2' and return one value with the same type. If 'Op1/Op2' are long double, 'l' is added as the suffix of name, if 'Op1/Op2' are float, we add a 'f' suffix. |
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Emit a call to the binary function DoubleFn, FloatFn or LongDoubleFn, depending of the type of Op1. |
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Emit a call to the calloc function. |
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Emit a call to the fputc function. This assumes that Char is an 'int', and File is a pointer to FILE. |
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Emit a call to the fputs function. Str is required to be a pointer and File is a pointer to FILE. |
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Emit a call to the fwrite function. This assumes that Ptr is a pointer, Size is an 'size_t', and File is a pointer to FILE. |
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Emit a call to the hot/cold operator new function. |
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Emit a call to the malloc function. |
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Emit a call to the memccpy function. |
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Emit a call to the memchr function. This assumes that Ptr is a pointer, Val is an 'int' value, and Len is an 'size_t' value. |
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Emit a call to the memcmp function. |
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Emit a call to the __memcpy_chk function to the builder. This expects that the Len and ObjSize have type 'size_t' and Dst/Src are pointers. |
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Emit a call to the mempcpy function. |
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Emit a call to the memrchr function, analogously to emitMemChr. |
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Emit a call to the putchar function. This assumes that Char is an 'int'. |
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Emit a call to the puts function. This assumes that Str is some pointer. |
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Emit a call to the snprintf function. |
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Emit a call to the sprintf function. |
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Emit a call to the stpcpy function to the builder, for the specified pointer arguments. |
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Emit a call to the stpncpy function to the builder, for the specified pointer arguments and length. |
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Emit a call to the strcat function. |
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Emit a call to the strchr function to the builder, for the specified pointer and character. Ptr is required to be some pointer type, and the return value has 'i8*' type. |
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Emit a call to the strcpy function to the builder, for the specified pointer arguments. |
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Emit a call to the strdup function to the builder, for the specified pointer. Ptr is required to be some pointer type, and the return value has 'i8*' type. |
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Emit a call to the strlcat function. |
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Emit a call to the strlcpy function. |
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Emit a call to the strlen function to the builder, for the specified pointer. Ptr is required to be some pointer type, and the return value has 'size_t' type. |
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Emit a call to the strncat function. |
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Emit a call to the strncmp function to the builder. |
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Emit a call to the strncpy function to the builder, for the specified pointer arguments and length. |
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Emit a call to the unary function DoubleFn, FloatFn or LongDoubleFn, depending of the type of Op. |
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Emit a call to the unary function named 'Name' (e.g. 'floor'). This function is known to take a single of type matching 'Op' and returns one value with the same type. If 'Op' is a long double, 'l' is added as the suffix of name, if 'Op' is a float, we add a 'f' suffix. |
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Emit a call to the vsnprintf function. |
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Emit a call to the vsprintf function. |
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Emit a call to the wcslen function to the builder, for the specified pointer. Ptr is required to be some pointer type, and the return value has 'size_t' type. |
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Returns unique alloca where the value comes from, or nullptr. If OffsetZero is true check that V points to the begining of the alloca. |
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As above, for DVRDeclareValues. |
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Finds dbg.declare records declaring local variables as living in the memory that 'V' points to. |
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As above, for DVRValues. |
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Finds the debug info records describing a value. |
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Finds the dbg.values describing a value. |
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Given a vector and an element number, see if the scalar value is already around as a register, for example if it were inserted then extracted from the vector. |
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Call |
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If a function is part of an allocation family (e.g. malloc/realloc/calloc/free), return the identifier for its family of functions. |
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Like getObjectSize(), but only returns the size of base objects (like allocas, global variables and allocator calls) and std::nullopt otherwise. Requires ExactSizeFromOffset mode. |
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Returns true if the value |
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This function computes the length of a null‐terminated C string pointed to by V. If successful, it returns true and returns the string in Str. If unsuccessful, it returns false. This does not include the trailing null character by default. If TrimAtNul is set to false, then this returns any trailing null characters as well as any other characters that come after it. |
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If this is a call to an allocation function that initializes memory to a fixed value, return said value in the requested type. Otherwise, return nullptr. |
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Return a valid Knowledge associated to the Value V if its Attribute kind is in AttrKinds and it matches the Filter. |
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Return a valid Knowledge associated to the Value V if its Attribute kind is in AttrKinds and the knowledge is suitable to be used in the context of CtxI. |
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Try to infer an alignment for the specified pointer. |
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A helper function that returns the address space of the pointer operand of load or store instruction. |
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A helper function that returns the alignment of load or store instruction. |
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A helper function that returns the pointer operand of a load or store instruction. Returns nullptr if not load or store. |
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A helper function that returns the type of a load or store instruction. |
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Compute the size of the object pointed by Ptr. Returns true and the object size in Size if successful, and false otherwise. In this context, by object we mean the region of memory starting at Ptr to the end of the underlying object pointed to by Ptr. |
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Try to ensure that the alignment of |
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A helper function that returns the pointer operand of a load, store or GEP instruction. Returns nullptr if not load, store, or GEP. |
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Get splat value if the input is a splat vector or return nullptr. The value may be extracted from a splat constants vector or from a sequence of instructions that broadcast a single value into a vector. |
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This method strips off any GEP address adjustments, pointer casts or |
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Like getUnderlyingObject(), but will try harder to find a single underlying object. In particular, this function also looks through selects and phis. |
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This method is similar to getUnderlyingObject except that it can look through phi and select instructions and return multiple objects. |
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This is a wrapper around getUnderlyingObjects and adds support for basic ptrtoint+arithmetic+inttoptr sequences. |
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Return true if V is poison given that ValAssumedPoison is already poison. For example, if ValAssumedPoison is |
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Invert the given true/false value, possibly reusing an existing copy. |
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Tests if a value is a call or invoke to a library function that allocates memory (either malloc, calloc, or strdup like). |
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Tests if a value is a call or invoke to a library function that allocates or reallocates memory (either malloc, calloc, realloc, or strdup like). |
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Return true if we know V to the base address of the corresponding memory object. This implies that any address less than V must be out of bounds for the underlying object. Note that just being isIdentifiedObject() is not enough ‐ For example, a negative offset from a noalias argument or call can be inbounds w.r.t the actual underlying object. |
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If the specified value can be set by repeating the same byte in memory, return the i8 value that it is represented with. This is true for all i8 values obviously, but is also true for i32 0, i32 ‐1, i16 0xF0F0, double 0.0 etc. If the value can't be handled with a repeated byte store (e.g. i16 0x1234), return null. If the value is entirely undef and padding, return undef. |
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Match one of the patterns up to the select/logic op: %Op0 = icmp ne i4 %X, 0 %Agg = call { i4, i1 } llvm.[us]mul.with.overflow.i4(i4 %X, i4 %Y) %Op1 = extractvalue { i4, i1 } %Agg, 1 %ret = select i1 %Op0, i1 %Op1, i1 false / %ret = and i1 %Op0, %Op1 |
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Returns true if the memory operations |
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Returns true if V is always a dereferenceable pointer with alignment greater or equal than requested. If the context instruction is specified performs context‐sensitive analysis and returns true if the pointer is dereferenceable at the specified instruction. If |
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Returns true if V is always dereferenceable for Size byte with alignment greater or equal than requested. If the context instruction is specified performs context‐sensitive analysis and returns true if the pointer is dereferenceable at the specified instruction. If |
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Equivalent to isDereferenceableAndAlignedPointer with an alignment of 1. |
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Equivalent to isDereferenceableAndAlignedPointer with an alignment of 1. |
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Returns true if the pointer is one which would have been considered an escape by isNotCapturedBefore. |
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Returns true if V cannot be poison, but may be undef. |
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Returns true if V cannot be undef, but may be poison. |
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Return true if this function can prove that V does not have undef bits and is never poison. If V is an aggregate value or vector, check whether all elements (except padding) are not undef or poison. Note that this is different from canCreateUndefOrPoison because the function assumes Op's operands are not poison/undef. |
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Returns true iff |
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Returns true iff |
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Return true if V is umabigously identified at the function‐level. Different IdentifiedFunctionLocals can't alias. Further, an IdentifiedFunctionLocal can not alias with any function arguments other than itself, which is not necessarily true for IdentifiedObjects. |
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Return true if this pointer refers to a distinct and identifiable object. This returns true for: Global Variables and Functions (but not Global Aliases) Allocas ByVal and NoAlias Arguments NoAlias returns (e.g. calls to malloc) |
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Return the boolean condition value in the context of the given instruction if it is known based on dominating conditions. |
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Return true if RHS is known to be implied true by LHS. Return false if RHS is known to be implied false by LHS. Otherwise, return std::nullopt if no implication can be made. A & B must be i1 (boolean) values or a vector of such values. Note that the truth table for implication is the same as <=u on i1 values (but not <=s!). The truth table for both is: | T | F (B) T | T | F F | T | T (A) |
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Return true if the floating‐point value |
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Return true iff: 1. X is poison implies Y is poison. 2. X is true implies Y is false. 3. X is false implies Y is true. Otherwise, return false. |
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Return true if the two given values are negation. Currently can recoginze Value pair: 1: <X, Y> if X = sub (0, Y) or Y = sub (0, X) 2: <X, Y> if X = sub (A, B) and Y = sub (B, A) |
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Returns true if the given value is known be negative (i.e. non‐positive and non‐zero). |
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Return true if the floating‐point value can never contain a NaN or infinity. |
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Return true if the floating‐point scalar value is not an infinity or if the floating‐point vector value has no infinities. Return false if a value could ever be infinity. |
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Return true if the floating‐point scalar value is not a NaN or if the floating‐point vector value has no NaN elements. Return false if a value could ever be NaN. |
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Return true if the given values are known to be non‐equal when defined. Supports scalar integer types only. |
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Returns true if the give value is known to be non‐negative. |
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Return true if the given value is known to be non‐zero when defined. For vectors, return true if every element is known to be non‐zero when defined. For pointers, if the context instruction and dominator tree are specified, perform context‐sensitive analysis and return true if the pointer couldn't possibly be null at the specified instruction. Supports values with integer or pointer type and vectors of integers. |
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Returns true if the given value is known be positive (i.e. non‐negative and non‐zero). |
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Return true if the given value is known to have exactly one bit set when defined. For vectors return true if every element is known to be a power of two when defined. Supports values with integer or pointer type and vectors of integers. If 'OrZero' is set, then return true if the given value is either a power of two or zero. |
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Return true if this pointer is returned by a noalias function. |
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Return true if Object memory is not visible after an unwind, in the sense that program semantics cannot depend on Object containing any particular value on unwind. If the RequiresNoCaptureBeforeUnwind out parameter is set to true, then the memory is only not visible if the object has not been captured prior to the unwind. Otherwise it is not visible even if captured. |
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Return true if we know that executing a load from this value cannot trap. |
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Return true if we know that executing a load from this value cannot trap. |
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Return true if each element of the vector value |
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Returns true iff |
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Returns true iff |
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Return true if the Object is writable, in the sense that any location based on this pointer that can be loaded can also be stored to without trapping. Additionally, at the point Object is declared, stores can be introduced without data races. At later points, this is only the case if the pointer can not escape to a different thread. |
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Given a mask vector of i1, Return true if any of the elements of this predicate mask are known to be true or undef. That is, return true if at least one lane can be assumed active. |
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Pattern match integer [SU]MIN, [SU]MAX and ABS idioms, returning the kind and providing the out parameter results if we successfully match. |
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Return true if the only users of this pointer are lifetime markers. |
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Return true if the only users of this pointer are lifetime markers or droppable instructions. |
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Analogous to the above, but return the Uses so that they can be modified. Unlike previous version, Condition is optional and may be null. |
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If U is widenable branch looking like: %cond = ... %wc = call i1 llvm.experimental.widenable.condition() %branch_cond = and i1 %cond, %wc br i1 %branch_cond, label %if_true_bb, label %if_false_bb ; <‐‐‐ U The function returns true, and the values %cond and %wc and blocks %if_true_bb, if_false_bb are returned in the parameters (Condition, WidenableCondition, IfTrueBB and IfFalseFF) respectively. If |
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Given a mask vector of the form <Y x i1>, return an APInt (of bitwidth Y) for each lane which may be active. |
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Get the intersection (logical and) of all of the potential IR flags of each scalar operation (VL) that will be converted into a vector (I). If OpValue is non‐null, we only consider operations similar to OpValue when intersecting. Flag set: NSW, NUW (if IncludeWrapFlags is true), exact, and all of fast‐math. |
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Replaces dbg.declare record when the address it describes is replaced with a new value. If Deref is true, an additional DW_OP_deref is prepended to the expression. If Offset is non‐zero, a constant displacement is added to the expression (between the optional Deref operations). Offset can be negative. |
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Replace each use of 'From' with 'To' if that use is dominated by the given edge. Returns the number of replacements made. |
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Replace each use of 'From' with 'To' if that use is dominated by the given instruction. Returns the number of replacements made. |
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Replace each use of 'From' with 'To' if that use is dominated by the end of the given BasicBlock. Returns the number of replacements made. |
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Replace each use of 'From' with 'To' if that use is dominated by the given instruction and the callback ShouldReplace returns true. Returns the number of replacements made. |
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Replace each use of 'From' with 'To' if that use is dominated by the end of the given BasicBlock and the callback ShouldReplace returns true. Returns the number of replacements made. |
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Replace each use of 'From' with 'To' if that use is dominated by the given edge and the callback ShouldReplace returns true. Returns the number of replacements made. |
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A helper function that set the alignment of load or store instruction. |
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Given operands for a AShr, fold the result or return nulll. |
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Given operands for an Add, fold the result or return null. |
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Given operands for an And, fold the result or return null. |
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Given operands for an ExtractElementInst, fold the result or return null. |
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Given operands for an ExtractValueInst, fold the result or return null. |
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Given operands for an FAdd, fold the result or return null. |
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Given operands for an FDiv, fold the result or return null. |
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Given operands for the multiplication of a FMA, fold the result or return null. In contrast to simplifyFMulInst, this function will not perform simplifications whose unrounded results differ when rounded to the argument type. |
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Given operands for an FMul, fold the result or return null. |
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Given operand for an FNeg, fold the result or return null. |
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Given operands for an FRem, fold the result or return null. |
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Given operands for an FSub, fold the result or return null. |
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Given an operand for a Freeze, see if we can fold the result. If not, this returns null. |
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Given operands for an InsertElement, fold the result or return null. |
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Given operands for an InsertValueInst, fold the result or return null. |
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Given operands for a LShr, fold the result or return null. |
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Given operands for a Mul, fold the result or return null. |
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Given operands for an Or, fold the result or return null. |
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Given operands for an SDiv, fold the result or return null. |
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Given operands for an SRem, fold the result or return null. |
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Given operands for a SelectInst, fold the result or return null. |
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Given operands for a Shl, fold the result or return null. |
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Given operands for a ShuffleVectorInst, fold the result or return null. See class ShuffleVectorInst for a description of the mask representation. |
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Given operands for a Sub, fold the result or return null. |
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Given operands for a UDiv, fold the result or return null. |
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Given operands for a URem, fold the result or return null. |
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See if V simplifies when its operand Op is replaced with RepOp. If not, return null. AllowRefinement specifies whether the simplification can be a refinement (e.g. 0 instead of poison), or whether it needs to be strictly identical. Op and RepOp can be assumed to not be poison when determining refinement. |
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Given operands for an Xor, fold the result or return null. |
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Returns the inner value X if the expression has the form f(X) where f(X) == 0 if and only if X == 0, otherwise returns nullptr. |
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If the specified pointer points to an object that we control, try to modify the object's alignment to PrefAlign. Returns a minimum known alignment of the value after the operation, which may be lower than PrefAlign. |
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Try to convert |
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Return true if |
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Like m_Specific(), but works if the specific value to match is determined as part of the same match() expression. For example: m_Add(m_Value(X), m_Specific(X)) is incorrect, because m_Specific() will bind X before the pattern match starts. m_Add(m_Value(X), m_Deferred(X)) is correct, and will check against whichever value m_Value(X) populated. |
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Match if we have a specific specified value. |
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Match against the nested pattern, and capture the value if we match. |
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Match against the nested pattern, and capture the value if we match. |
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Match a value, capturing it if we match. |
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Return true if CoerceAvailableValueToLoadType would succeed if it was called. |
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If we saw a store of a value to memory, and then a load from a must‐aliased pointer of a different type, try to coerce the stored value to the loaded type. LoadedTy is the type of the load we want to replace. IRB is IRBuilder used to insert new instructions. |
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If analyzeLoadFromClobberingStore/Load returned an offset, this function can be used to actually perform the extraction of the bits from the store. It inserts instructions to do so at InsertPt, and returns the extracted value. |
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Evaluate the filter expression against the current instrumentation opportunity. Returns true if the filter passes (or is empty), false otherwise. Dynamic values (non‐constants) are assumed to pass. |
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Map V to its ARCInstKind equivalence class. |
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Assuming the given instruction is one of the special calls such as objc_retain or objc_release, return the RCIdentity root of the argument of the call. |
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Determine which objc runtime call instruction class V belongs to. |
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The RCIdentity root of a value |
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Helper which calls const Value *GetRCIdentityRoot(const Value *V) and just casts away the const of the result. For documentation about what an RCIdentityRoot (and by extension GetRCIdentityRoot is) look at that function. |
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This is a wrapper around getUnderlyingObject which also knows how to look through objc_retain and objc_autorelease calls, which we know to return their argument verbatim. |
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A wrapper for GetUnderlyingObjCPtr used for results memoization. |
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Return true if this value refers to a distinct and identifiable object. |
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Test whether the given value is possible a retainable object pointer. |
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