1 //===-- llvm/Instructions.h - Instruction subclass definitions --*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file exposes the class definitions of all of the subclasses of the
11 // Instruction class. This is meant to be an easy way to get access to all
12 // instruction subclasses.
14 //===----------------------------------------------------------------------===//
16 #ifndef LLVM_INSTRUCTIONS_H
17 #define LLVM_INSTRUCTIONS_H
21 #include "llvm/InstrTypes.h"
22 #include "llvm/DerivedTypes.h"
34 //===----------------------------------------------------------------------===//
35 // AllocationInst Class
36 //===----------------------------------------------------------------------===//
38 /// AllocationInst - This class is the common base class of MallocInst and
41 class AllocationInst : public UnaryInstruction {
44 AllocationInst(const Type *Ty, Value *ArraySize, unsigned iTy, unsigned Align,
45 const std::string &Name = "", Instruction *InsertBefore = 0);
46 AllocationInst(const Type *Ty, Value *ArraySize, unsigned iTy, unsigned Align,
47 const std::string &Name, BasicBlock *InsertAtEnd);
49 // Out of line virtual method, so the vtable, etc has a home.
50 virtual ~AllocationInst();
52 /// isArrayAllocation - Return true if there is an allocation size parameter
53 /// to the allocation instruction that is not 1.
55 bool isArrayAllocation() const;
57 /// getArraySize - Get the number of element allocated, for a simple
58 /// allocation of a single element, this will return a constant 1 value.
60 inline const Value *getArraySize() const { return getOperand(0); }
61 inline Value *getArraySize() { return getOperand(0); }
63 /// getType - Overload to return most specific pointer type
65 inline const PointerType *getType() const {
66 return reinterpret_cast<const PointerType*>(Instruction::getType());
69 /// getAllocatedType - Return the type that is being allocated by the
72 const Type *getAllocatedType() const;
74 /// getAlignment - Return the alignment of the memory that is being allocated
75 /// by the instruction.
77 unsigned getAlignment() const { return Alignment; }
78 void setAlignment(unsigned Align) {
79 assert((Align & (Align-1)) == 0 && "Alignment is not a power of 2!");
83 virtual Instruction *clone() const = 0;
85 // Methods for support type inquiry through isa, cast, and dyn_cast:
86 static inline bool classof(const AllocationInst *) { return true; }
87 static inline bool classof(const Instruction *I) {
88 return I->getOpcode() == Instruction::Alloca ||
89 I->getOpcode() == Instruction::Malloc;
91 static inline bool classof(const Value *V) {
92 return isa<Instruction>(V) && classof(cast<Instruction>(V));
97 //===----------------------------------------------------------------------===//
99 //===----------------------------------------------------------------------===//
101 /// MallocInst - an instruction to allocated memory on the heap
103 class MallocInst : public AllocationInst {
104 MallocInst(const MallocInst &MI);
106 explicit MallocInst(const Type *Ty, Value *ArraySize = 0,
107 const std::string &Name = "",
108 Instruction *InsertBefore = 0)
109 : AllocationInst(Ty, ArraySize, Malloc, 0, Name, InsertBefore) {}
110 MallocInst(const Type *Ty, Value *ArraySize, const std::string &Name,
111 BasicBlock *InsertAtEnd)
112 : AllocationInst(Ty, ArraySize, Malloc, 0, Name, InsertAtEnd) {}
114 MallocInst(const Type *Ty, const std::string &Name,
115 Instruction *InsertBefore = 0)
116 : AllocationInst(Ty, 0, Malloc, 0, Name, InsertBefore) {}
117 MallocInst(const Type *Ty, const std::string &Name, BasicBlock *InsertAtEnd)
118 : AllocationInst(Ty, 0, Malloc, 0, Name, InsertAtEnd) {}
120 MallocInst(const Type *Ty, Value *ArraySize, unsigned Align,
121 const std::string &Name, BasicBlock *InsertAtEnd)
122 : AllocationInst(Ty, ArraySize, Malloc, Align, Name, InsertAtEnd) {}
123 MallocInst(const Type *Ty, Value *ArraySize, unsigned Align,
124 const std::string &Name = "",
125 Instruction *InsertBefore = 0)
126 : AllocationInst(Ty, ArraySize, Malloc, Align, Name, InsertBefore) {}
128 virtual MallocInst *clone() const;
130 // Methods for support type inquiry through isa, cast, and dyn_cast:
131 static inline bool classof(const MallocInst *) { return true; }
132 static inline bool classof(const Instruction *I) {
133 return (I->getOpcode() == Instruction::Malloc);
135 static inline bool classof(const Value *V) {
136 return isa<Instruction>(V) && classof(cast<Instruction>(V));
141 //===----------------------------------------------------------------------===//
143 //===----------------------------------------------------------------------===//
145 /// AllocaInst - an instruction to allocate memory on the stack
147 class AllocaInst : public AllocationInst {
148 AllocaInst(const AllocaInst &);
150 explicit AllocaInst(const Type *Ty, Value *ArraySize = 0,
151 const std::string &Name = "",
152 Instruction *InsertBefore = 0)
153 : AllocationInst(Ty, ArraySize, Alloca, 0, Name, InsertBefore) {}
154 AllocaInst(const Type *Ty, Value *ArraySize, const std::string &Name,
155 BasicBlock *InsertAtEnd)
156 : AllocationInst(Ty, ArraySize, Alloca, 0, Name, InsertAtEnd) {}
158 AllocaInst(const Type *Ty, const std::string &Name,
159 Instruction *InsertBefore = 0)
160 : AllocationInst(Ty, 0, Alloca, 0, Name, InsertBefore) {}
161 AllocaInst(const Type *Ty, const std::string &Name, BasicBlock *InsertAtEnd)
162 : AllocationInst(Ty, 0, Alloca, 0, Name, InsertAtEnd) {}
164 AllocaInst(const Type *Ty, Value *ArraySize, unsigned Align,
165 const std::string &Name = "", Instruction *InsertBefore = 0)
166 : AllocationInst(Ty, ArraySize, Alloca, Align, Name, InsertBefore) {}
167 AllocaInst(const Type *Ty, Value *ArraySize, unsigned Align,
168 const std::string &Name, BasicBlock *InsertAtEnd)
169 : AllocationInst(Ty, ArraySize, Alloca, Align, Name, InsertAtEnd) {}
171 virtual AllocaInst *clone() const;
173 // Methods for support type inquiry through isa, cast, and dyn_cast:
174 static inline bool classof(const AllocaInst *) { return true; }
175 static inline bool classof(const Instruction *I) {
176 return (I->getOpcode() == Instruction::Alloca);
178 static inline bool classof(const Value *V) {
179 return isa<Instruction>(V) && classof(cast<Instruction>(V));
184 //===----------------------------------------------------------------------===//
186 //===----------------------------------------------------------------------===//
188 /// FreeInst - an instruction to deallocate memory
190 class FreeInst : public UnaryInstruction {
193 explicit FreeInst(Value *Ptr, Instruction *InsertBefore = 0);
194 FreeInst(Value *Ptr, BasicBlock *InsertAfter);
196 virtual FreeInst *clone() const;
198 // Accessor methods for consistency with other memory operations
199 Value *getPointerOperand() { return getOperand(0); }
200 const Value *getPointerOperand() const { return getOperand(0); }
202 // Methods for support type inquiry through isa, cast, and dyn_cast:
203 static inline bool classof(const FreeInst *) { return true; }
204 static inline bool classof(const Instruction *I) {
205 return (I->getOpcode() == Instruction::Free);
207 static inline bool classof(const Value *V) {
208 return isa<Instruction>(V) && classof(cast<Instruction>(V));
213 //===----------------------------------------------------------------------===//
215 //===----------------------------------------------------------------------===//
217 /// LoadInst - an instruction for reading from memory. This uses the
218 /// SubclassData field in Value to store whether or not the load is volatile.
220 class LoadInst : public UnaryInstruction {
222 LoadInst(const LoadInst &LI)
223 : UnaryInstruction(LI.getType(), Load, LI.getOperand(0)) {
224 setVolatile(LI.isVolatile());
225 setAlignment(LI.getAlignment());
233 LoadInst(Value *Ptr, const std::string &Name, Instruction *InsertBefore);
234 LoadInst(Value *Ptr, const std::string &Name, BasicBlock *InsertAtEnd);
235 LoadInst(Value *Ptr, const std::string &Name, bool isVolatile = false,
236 Instruction *InsertBefore = 0);
237 LoadInst(Value *Ptr, const std::string &Name, bool isVolatile, unsigned Align,
238 Instruction *InsertBefore = 0);
239 LoadInst(Value *Ptr, const std::string &Name, bool isVolatile,
240 BasicBlock *InsertAtEnd);
241 LoadInst(Value *Ptr, const std::string &Name, bool isVolatile, unsigned Align,
242 BasicBlock *InsertAtEnd);
244 LoadInst(Value *Ptr, const char *Name, Instruction *InsertBefore);
245 LoadInst(Value *Ptr, const char *Name, BasicBlock *InsertAtEnd);
246 explicit LoadInst(Value *Ptr, const char *Name = 0, bool isVolatile = false,
247 Instruction *InsertBefore = 0);
248 LoadInst(Value *Ptr, const char *Name, bool isVolatile,
249 BasicBlock *InsertAtEnd);
251 /// isVolatile - Return true if this is a load from a volatile memory
254 bool isVolatile() const { return SubclassData & 1; }
256 /// setVolatile - Specify whether this is a volatile load or not.
258 void setVolatile(bool V) {
259 SubclassData = (SubclassData & ~1) | (V ? 1 : 0);
262 virtual LoadInst *clone() const;
264 /// getAlignment - Return the alignment of the access that is being performed
266 unsigned getAlignment() const {
267 return (1 << (SubclassData>>1)) >> 1;
270 void setAlignment(unsigned Align);
272 Value *getPointerOperand() { return getOperand(0); }
273 const Value *getPointerOperand() const { return getOperand(0); }
274 static unsigned getPointerOperandIndex() { return 0U; }
276 // Methods for support type inquiry through isa, cast, and dyn_cast:
277 static inline bool classof(const LoadInst *) { return true; }
278 static inline bool classof(const Instruction *I) {
279 return I->getOpcode() == Instruction::Load;
281 static inline bool classof(const Value *V) {
282 return isa<Instruction>(V) && classof(cast<Instruction>(V));
287 //===----------------------------------------------------------------------===//
289 //===----------------------------------------------------------------------===//
291 /// StoreInst - an instruction for storing to memory
293 class StoreInst : public Instruction {
296 StoreInst(const StoreInst &SI) : Instruction(SI.getType(), Store, Ops, 2) {
297 Ops[0].init(SI.Ops[0], this);
298 Ops[1].init(SI.Ops[1], this);
299 setVolatile(SI.isVolatile());
300 setAlignment(SI.getAlignment());
308 StoreInst(Value *Val, Value *Ptr, Instruction *InsertBefore);
309 StoreInst(Value *Val, Value *Ptr, BasicBlock *InsertAtEnd);
310 StoreInst(Value *Val, Value *Ptr, bool isVolatile = false,
311 Instruction *InsertBefore = 0);
312 StoreInst(Value *Val, Value *Ptr, bool isVolatile,
313 unsigned Align, Instruction *InsertBefore = 0);
314 StoreInst(Value *Val, Value *Ptr, bool isVolatile, BasicBlock *InsertAtEnd);
315 StoreInst(Value *Val, Value *Ptr, bool isVolatile,
316 unsigned Align, BasicBlock *InsertAtEnd);
319 /// isVolatile - Return true if this is a load from a volatile memory
322 bool isVolatile() const { return SubclassData & 1; }
324 /// setVolatile - Specify whether this is a volatile load or not.
326 void setVolatile(bool V) {
327 SubclassData = (SubclassData & ~1) | (V ? 1 : 0);
330 /// Transparently provide more efficient getOperand methods.
331 Value *getOperand(unsigned i) const {
332 assert(i < 2 && "getOperand() out of range!");
335 void setOperand(unsigned i, Value *Val) {
336 assert(i < 2 && "setOperand() out of range!");
339 unsigned getNumOperands() const { return 2; }
341 /// getAlignment - Return the alignment of the access that is being performed
343 unsigned getAlignment() const {
344 return (1 << (SubclassData>>1)) >> 1;
347 void setAlignment(unsigned Align);
349 virtual StoreInst *clone() const;
351 Value *getPointerOperand() { return getOperand(1); }
352 const Value *getPointerOperand() const { return getOperand(1); }
353 static unsigned getPointerOperandIndex() { return 1U; }
355 // Methods for support type inquiry through isa, cast, and dyn_cast:
356 static inline bool classof(const StoreInst *) { return true; }
357 static inline bool classof(const Instruction *I) {
358 return I->getOpcode() == Instruction::Store;
360 static inline bool classof(const Value *V) {
361 return isa<Instruction>(V) && classof(cast<Instruction>(V));
366 //===----------------------------------------------------------------------===//
367 // GetElementPtrInst Class
368 //===----------------------------------------------------------------------===//
370 // checkType - Simple wrapper function to give a better assertion failure
371 // message on bad indexes for a gep instruction.
373 static inline const Type *checkType(const Type *Ty) {
374 assert(Ty && "Invalid GetElementPtrInst indices for type!");
378 /// GetElementPtrInst - an instruction for type-safe pointer arithmetic to
379 /// access elements of arrays and structs
381 class GetElementPtrInst : public Instruction {
382 GetElementPtrInst(const GetElementPtrInst &GEPI)
383 : Instruction(reinterpret_cast<const Type*>(GEPI.getType()), GetElementPtr,
384 0, GEPI.getNumOperands()) {
385 Use *OL = OperandList = new Use[NumOperands];
386 Use *GEPIOL = GEPI.OperandList;
387 for (unsigned i = 0, E = NumOperands; i != E; ++i)
388 OL[i].init(GEPIOL[i], this);
390 void init(Value *Ptr, Value* const *Idx, unsigned NumIdx);
391 void init(Value *Ptr, Value *Idx);
393 template<typename InputIterator>
394 void init(Value *Ptr, InputIterator IdxBegin, InputIterator IdxEnd,
395 const std::string &Name,
396 // This argument ensures that we have an iterator we can
397 // do arithmetic on in constant time
398 std::random_access_iterator_tag) {
399 typename std::iterator_traits<InputIterator>::difference_type NumIdx =
400 std::distance(IdxBegin, IdxEnd);
403 // This requires that the itoerator points to contiguous memory.
404 init(Ptr, &*IdxBegin, NumIdx);
407 init(Ptr, 0, NumIdx);
413 /// getIndexedType - Returns the type of the element that would be loaded with
414 /// a load instruction with the specified parameters.
416 /// A null type is returned if the indices are invalid for the specified
419 static const Type *getIndexedType(const Type *Ptr,
420 Value* const *Idx, unsigned NumIdx,
421 bool AllowStructLeaf = false);
423 template<typename InputIterator>
424 static const Type *getIndexedType(const Type *Ptr,
425 InputIterator IdxBegin,
426 InputIterator IdxEnd,
427 bool AllowStructLeaf,
428 // This argument ensures that we
429 // have an iterator we can do
430 // arithmetic on in constant time
431 std::random_access_iterator_tag) {
432 typename std::iterator_traits<InputIterator>::difference_type NumIdx =
433 std::distance(IdxBegin, IdxEnd);
436 // This requires that the iterator points to contiguous memory.
437 return(getIndexedType(Ptr, (Value *const *)&*IdxBegin, NumIdx,
441 return(getIndexedType(Ptr, (Value *const*)0, NumIdx, AllowStructLeaf));
446 /// Constructors - Create a getelementptr instruction with a base pointer an
447 /// list of indices. The first ctor can optionally insert before an existing
448 /// instruction, the second appends the new instruction to the specified
450 template<typename InputIterator>
451 GetElementPtrInst(Value *Ptr, InputIterator IdxBegin,
452 InputIterator IdxEnd,
453 const std::string &Name = "",
454 Instruction *InsertBefore =0)
455 : Instruction(PointerType::get(
456 checkType(getIndexedType(Ptr->getType(),
457 IdxBegin, IdxEnd, true)),
458 cast<PointerType>(Ptr->getType())->getAddressSpace()),
459 GetElementPtr, 0, 0, InsertBefore) {
460 init(Ptr, IdxBegin, IdxEnd, Name,
461 typename std::iterator_traits<InputIterator>::iterator_category());
463 template<typename InputIterator>
464 GetElementPtrInst(Value *Ptr, InputIterator IdxBegin, InputIterator IdxEnd,
465 const std::string &Name, BasicBlock *InsertAtEnd)
466 : Instruction(PointerType::get(
467 checkType(getIndexedType(Ptr->getType(),
468 IdxBegin, IdxEnd, true)),
469 cast<PointerType>(Ptr->getType())->getAddressSpace()),
470 GetElementPtr, 0, 0, InsertAtEnd) {
471 init(Ptr, IdxBegin, IdxEnd, Name,
472 typename std::iterator_traits<InputIterator>::iterator_category());
475 /// Constructors - These two constructors are convenience methods because one
476 /// and two index getelementptr instructions are so common.
477 GetElementPtrInst(Value *Ptr, Value *Idx,
478 const std::string &Name = "", Instruction *InsertBefore =0);
479 GetElementPtrInst(Value *Ptr, Value *Idx,
480 const std::string &Name, BasicBlock *InsertAtEnd);
481 ~GetElementPtrInst();
483 virtual GetElementPtrInst *clone() const;
485 // getType - Overload to return most specific pointer type...
486 inline const PointerType *getType() const {
487 return reinterpret_cast<const PointerType*>(Instruction::getType());
490 /// getIndexedType - Returns the type of the element that would be loaded with
491 /// a load instruction with the specified parameters.
493 /// A null type is returned if the indices are invalid for the specified
496 template<typename InputIterator>
497 static const Type *getIndexedType(const Type *Ptr,
498 InputIterator IdxBegin,
499 InputIterator IdxEnd,
500 bool AllowStructLeaf = false) {
501 return(getIndexedType(Ptr, IdxBegin, IdxEnd, AllowStructLeaf,
502 typename std::iterator_traits<InputIterator>::
503 iterator_category()));
505 static const Type *getIndexedType(const Type *Ptr, Value *Idx);
507 inline op_iterator idx_begin() { return op_begin()+1; }
508 inline const_op_iterator idx_begin() const { return op_begin()+1; }
509 inline op_iterator idx_end() { return op_end(); }
510 inline const_op_iterator idx_end() const { return op_end(); }
512 Value *getPointerOperand() {
513 return getOperand(0);
515 const Value *getPointerOperand() const {
516 return getOperand(0);
518 static unsigned getPointerOperandIndex() {
519 return 0U; // get index for modifying correct operand
522 inline unsigned getNumIndices() const { // Note: always non-negative
523 return getNumOperands() - 1;
526 inline bool hasIndices() const {
527 return getNumOperands() > 1;
530 /// hasAllZeroIndices - Return true if all of the indices of this GEP are
531 /// zeros. If so, the result pointer and the first operand have the same
532 /// value, just potentially different types.
533 bool hasAllZeroIndices() const;
535 /// hasAllConstantIndices - Return true if all of the indices of this GEP are
536 /// constant integers. If so, the result pointer and the first operand have
537 /// a constant offset between them.
538 bool hasAllConstantIndices() const;
541 // Methods for support type inquiry through isa, cast, and dyn_cast:
542 static inline bool classof(const GetElementPtrInst *) { return true; }
543 static inline bool classof(const Instruction *I) {
544 return (I->getOpcode() == Instruction::GetElementPtr);
546 static inline bool classof(const Value *V) {
547 return isa<Instruction>(V) && classof(cast<Instruction>(V));
551 //===----------------------------------------------------------------------===//
553 //===----------------------------------------------------------------------===//
555 /// This instruction compares its operands according to the predicate given
556 /// to the constructor. It only operates on integers, pointers, or packed
557 /// vectors of integrals. The two operands must be the same type.
558 /// @brief Represent an integer comparison operator.
559 class ICmpInst: public CmpInst {
561 /// This enumeration lists the possible predicates for the ICmpInst. The
562 /// values in the range 0-31 are reserved for FCmpInst while values in the
563 /// range 32-64 are reserved for ICmpInst. This is necessary to ensure the
564 /// predicate values are not overlapping between the classes.
566 ICMP_EQ = 32, ///< equal
567 ICMP_NE = 33, ///< not equal
568 ICMP_UGT = 34, ///< unsigned greater than
569 ICMP_UGE = 35, ///< unsigned greater or equal
570 ICMP_ULT = 36, ///< unsigned less than
571 ICMP_ULE = 37, ///< unsigned less or equal
572 ICMP_SGT = 38, ///< signed greater than
573 ICMP_SGE = 39, ///< signed greater or equal
574 ICMP_SLT = 40, ///< signed less than
575 ICMP_SLE = 41, ///< signed less or equal
576 FIRST_ICMP_PREDICATE = ICMP_EQ,
577 LAST_ICMP_PREDICATE = ICMP_SLE,
578 BAD_ICMP_PREDICATE = ICMP_SLE + 1
581 /// @brief Constructor with insert-before-instruction semantics.
583 Predicate pred, ///< The predicate to use for the comparison
584 Value *LHS, ///< The left-hand-side of the expression
585 Value *RHS, ///< The right-hand-side of the expression
586 const std::string &Name = "", ///< Name of the instruction
587 Instruction *InsertBefore = 0 ///< Where to insert
588 ) : CmpInst(Instruction::ICmp, pred, LHS, RHS, Name, InsertBefore) {
591 /// @brief Constructor with insert-at-block-end semantics.
593 Predicate pred, ///< The predicate to use for the comparison
594 Value *LHS, ///< The left-hand-side of the expression
595 Value *RHS, ///< The right-hand-side of the expression
596 const std::string &Name, ///< Name of the instruction
597 BasicBlock *InsertAtEnd ///< Block to insert into.
598 ) : CmpInst(Instruction::ICmp, pred, LHS, RHS, Name, InsertAtEnd) {
601 /// @brief Return the predicate for this instruction.
602 Predicate getPredicate() const { return Predicate(SubclassData); }
604 /// @brief Set the predicate for this instruction to the specified value.
605 void setPredicate(Predicate P) { SubclassData = P; }
607 /// For example, EQ -> NE, UGT -> ULE, SLT -> SGE, etc.
608 /// @returns the inverse predicate for the instruction's current predicate.
609 /// @brief Return the inverse of the instruction's predicate.
610 Predicate getInversePredicate() const {
611 return getInversePredicate(getPredicate());
614 /// For example, EQ -> NE, UGT -> ULE, SLT -> SGE, etc.
615 /// @returns the inverse predicate for predicate provided in \p pred.
616 /// @brief Return the inverse of a given predicate
617 static Predicate getInversePredicate(Predicate pred);
619 /// For example, EQ->EQ, SLE->SGE, ULT->UGT, etc.
620 /// @returns the predicate that would be the result of exchanging the two
621 /// operands of the ICmpInst instruction without changing the result
623 /// @brief Return the predicate as if the operands were swapped
624 Predicate getSwappedPredicate() const {
625 return getSwappedPredicate(getPredicate());
628 /// This is a static version that you can use without an instruction
630 /// @brief Return the predicate as if the operands were swapped.
631 static Predicate getSwappedPredicate(Predicate pred);
633 /// For example, EQ->EQ, SLE->SLE, UGT->SGT, etc.
634 /// @returns the predicate that would be the result if the operand were
635 /// regarded as signed.
636 /// @brief Return the signed version of the predicate
637 Predicate getSignedPredicate() const {
638 return getSignedPredicate(getPredicate());
641 /// This is a static version that you can use without an instruction.
642 /// @brief Return the signed version of the predicate.
643 static Predicate getSignedPredicate(Predicate pred);
645 /// isEquality - Return true if this predicate is either EQ or NE. This also
646 /// tests for commutativity.
647 static bool isEquality(Predicate P) {
648 return P == ICMP_EQ || P == ICMP_NE;
651 /// isEquality - Return true if this predicate is either EQ or NE. This also
652 /// tests for commutativity.
653 bool isEquality() const {
654 return isEquality(getPredicate());
657 /// @returns true if the predicate of this ICmpInst is commutative
658 /// @brief Determine if this relation is commutative.
659 bool isCommutative() const { return isEquality(); }
661 /// isRelational - Return true if the predicate is relational (not EQ or NE).
663 bool isRelational() const {
664 return !isEquality();
667 /// isRelational - Return true if the predicate is relational (not EQ or NE).
669 static bool isRelational(Predicate P) {
670 return !isEquality(P);
673 /// @returns true if the predicate of this ICmpInst is signed, false otherwise
674 /// @brief Determine if this instruction's predicate is signed.
675 bool isSignedPredicate() const { return isSignedPredicate(getPredicate()); }
677 /// @returns true if the predicate provided is signed, false otherwise
678 /// @brief Determine if the predicate is signed.
679 static bool isSignedPredicate(Predicate pred);
681 /// Initialize a set of values that all satisfy the predicate with C.
682 /// @brief Make a ConstantRange for a relation with a constant value.
683 static ConstantRange makeConstantRange(Predicate pred, const APInt &C);
685 /// Exchange the two operands to this instruction in such a way that it does
686 /// not modify the semantics of the instruction. The predicate value may be
687 /// changed to retain the same result if the predicate is order dependent
689 /// @brief Swap operands and adjust predicate.
690 void swapOperands() {
691 SubclassData = getSwappedPredicate();
692 std::swap(Ops[0], Ops[1]);
695 virtual ICmpInst *clone() const;
697 // Methods for support type inquiry through isa, cast, and dyn_cast:
698 static inline bool classof(const ICmpInst *) { return true; }
699 static inline bool classof(const Instruction *I) {
700 return I->getOpcode() == Instruction::ICmp;
702 static inline bool classof(const Value *V) {
703 return isa<Instruction>(V) && classof(cast<Instruction>(V));
707 //===----------------------------------------------------------------------===//
709 //===----------------------------------------------------------------------===//
711 /// This instruction compares its operands according to the predicate given
712 /// to the constructor. It only operates on floating point values or packed
713 /// vectors of floating point values. The operands must be identical types.
714 /// @brief Represents a floating point comparison operator.
715 class FCmpInst: public CmpInst {
717 /// This enumeration lists the possible predicates for the FCmpInst. Values
718 /// in the range 0-31 are reserved for FCmpInst.
720 // Opcode U L G E Intuitive operation
721 FCMP_FALSE = 0, ///< 0 0 0 0 Always false (always folded)
722 FCMP_OEQ = 1, ///< 0 0 0 1 True if ordered and equal
723 FCMP_OGT = 2, ///< 0 0 1 0 True if ordered and greater than
724 FCMP_OGE = 3, ///< 0 0 1 1 True if ordered and greater than or equal
725 FCMP_OLT = 4, ///< 0 1 0 0 True if ordered and less than
726 FCMP_OLE = 5, ///< 0 1 0 1 True if ordered and less than or equal
727 FCMP_ONE = 6, ///< 0 1 1 0 True if ordered and operands are unequal
728 FCMP_ORD = 7, ///< 0 1 1 1 True if ordered (no nans)
729 FCMP_UNO = 8, ///< 1 0 0 0 True if unordered: isnan(X) | isnan(Y)
730 FCMP_UEQ = 9, ///< 1 0 0 1 True if unordered or equal
731 FCMP_UGT =10, ///< 1 0 1 0 True if unordered or greater than
732 FCMP_UGE =11, ///< 1 0 1 1 True if unordered, greater than, or equal
733 FCMP_ULT =12, ///< 1 1 0 0 True if unordered or less than
734 FCMP_ULE =13, ///< 1 1 0 1 True if unordered, less than, or equal
735 FCMP_UNE =14, ///< 1 1 1 0 True if unordered or not equal
736 FCMP_TRUE =15, ///< 1 1 1 1 Always true (always folded)
737 FIRST_FCMP_PREDICATE = FCMP_FALSE,
738 LAST_FCMP_PREDICATE = FCMP_TRUE,
739 BAD_FCMP_PREDICATE = FCMP_TRUE + 1
742 /// @brief Constructor with insert-before-instruction semantics.
744 Predicate pred, ///< The predicate to use for the comparison
745 Value *LHS, ///< The left-hand-side of the expression
746 Value *RHS, ///< The right-hand-side of the expression
747 const std::string &Name = "", ///< Name of the instruction
748 Instruction *InsertBefore = 0 ///< Where to insert
749 ) : CmpInst(Instruction::FCmp, pred, LHS, RHS, Name, InsertBefore) {
752 /// @brief Constructor with insert-at-block-end semantics.
754 Predicate pred, ///< The predicate to use for the comparison
755 Value *LHS, ///< The left-hand-side of the expression
756 Value *RHS, ///< The right-hand-side of the expression
757 const std::string &Name, ///< Name of the instruction
758 BasicBlock *InsertAtEnd ///< Block to insert into.
759 ) : CmpInst(Instruction::FCmp, pred, LHS, RHS, Name, InsertAtEnd) {
762 /// @brief Return the predicate for this instruction.
763 Predicate getPredicate() const { return Predicate(SubclassData); }
765 /// @brief Set the predicate for this instruction to the specified value.
766 void setPredicate(Predicate P) { SubclassData = P; }
768 /// For example, OEQ -> UNE, UGT -> OLE, OLT -> UGE, etc.
769 /// @returns the inverse predicate for the instructions current predicate.
770 /// @brief Return the inverse of the predicate
771 Predicate getInversePredicate() const {
772 return getInversePredicate(getPredicate());
775 /// For example, OEQ -> UNE, UGT -> OLE, OLT -> UGE, etc.
776 /// @returns the inverse predicate for \p pred.
777 /// @brief Return the inverse of a given predicate
778 static Predicate getInversePredicate(Predicate pred);
780 /// For example, OEQ->OEQ, ULE->UGE, OLT->OGT, etc.
781 /// @returns the predicate that would be the result of exchanging the two
782 /// operands of the ICmpInst instruction without changing the result
784 /// @brief Return the predicate as if the operands were swapped
785 Predicate getSwappedPredicate() const {
786 return getSwappedPredicate(getPredicate());
789 /// This is a static version that you can use without an instruction
791 /// @brief Return the predicate as if the operands were swapped.
792 static Predicate getSwappedPredicate(Predicate Opcode);
794 /// This also tests for commutativity. If isEquality() returns true then
795 /// the predicate is also commutative. Only the equality predicates are
797 /// @returns true if the predicate of this instruction is EQ or NE.
798 /// @brief Determine if this is an equality predicate.
799 bool isEquality() const {
800 return SubclassData == FCMP_OEQ || SubclassData == FCMP_ONE ||
801 SubclassData == FCMP_UEQ || SubclassData == FCMP_UNE;
803 bool isCommutative() const { return isEquality(); }
805 /// @returns true if the predicate is relational (not EQ or NE).
806 /// @brief Determine if this a relational predicate.
807 bool isRelational() const { return !isEquality(); }
809 /// Exchange the two operands to this instruction in such a way that it does
810 /// not modify the semantics of the instruction. The predicate value may be
811 /// changed to retain the same result if the predicate is order dependent
813 /// @brief Swap operands and adjust predicate.
814 void swapOperands() {
815 SubclassData = getSwappedPredicate();
816 std::swap(Ops[0], Ops[1]);
819 virtual FCmpInst *clone() const;
821 /// @brief Methods for support type inquiry through isa, cast, and dyn_cast:
822 static inline bool classof(const FCmpInst *) { return true; }
823 static inline bool classof(const Instruction *I) {
824 return I->getOpcode() == Instruction::FCmp;
826 static inline bool classof(const Value *V) {
827 return isa<Instruction>(V) && classof(cast<Instruction>(V));
831 //===----------------------------------------------------------------------===//
833 //===----------------------------------------------------------------------===//
834 /// CallInst - This class represents a function call, abstracting a target
835 /// machine's calling convention. This class uses low bit of the SubClassData
836 /// field to indicate whether or not this is a tail call. The rest of the bits
837 /// hold the calling convention of the call.
840 class CallInst : public Instruction {
841 const ParamAttrsList *ParamAttrs; ///< parameter attributes for call
842 CallInst(const CallInst &CI);
843 void init(Value *Func, Value* const *Params, unsigned NumParams);
844 void init(Value *Func, Value *Actual1, Value *Actual2);
845 void init(Value *Func, Value *Actual);
846 void init(Value *Func);
848 template<typename InputIterator>
849 void init(Value *Func, InputIterator ArgBegin, InputIterator ArgEnd,
850 const std::string &Name,
851 // This argument ensures that we have an iterator we can
852 // do arithmetic on in constant time
853 std::random_access_iterator_tag) {
854 unsigned NumArgs = (unsigned)std::distance(ArgBegin, ArgEnd);
856 // This requires that the iterator points to contiguous memory.
857 init(Func, NumArgs ? &*ArgBegin : 0, NumArgs);
862 /// Construct a CallInst given a range of arguments. InputIterator
863 /// must be a random-access iterator pointing to contiguous storage
864 /// (e.g. a std::vector<>::iterator). Checks are made for
865 /// random-accessness but not for contiguous storage as that would
866 /// incur runtime overhead.
867 /// @brief Construct a CallInst from a range of arguments
868 template<typename InputIterator>
869 CallInst(Value *Func, InputIterator ArgBegin, InputIterator ArgEnd,
870 const std::string &Name = "", Instruction *InsertBefore = 0)
871 : Instruction(cast<FunctionType>(cast<PointerType>(Func->getType())
872 ->getElementType())->getReturnType(),
873 Instruction::Call, 0, 0, InsertBefore) {
874 init(Func, ArgBegin, ArgEnd, Name,
875 typename std::iterator_traits<InputIterator>::iterator_category());
878 /// Construct a CallInst given a range of arguments. InputIterator
879 /// must be a random-access iterator pointing to contiguous storage
880 /// (e.g. a std::vector<>::iterator). Checks are made for
881 /// random-accessness but not for contiguous storage as that would
882 /// incur runtime overhead.
883 /// @brief Construct a CallInst from a range of arguments
884 template<typename InputIterator>
885 CallInst(Value *Func, InputIterator ArgBegin, InputIterator ArgEnd,
886 const std::string &Name, BasicBlock *InsertAtEnd)
887 : Instruction(cast<FunctionType>(cast<PointerType>(Func->getType())
888 ->getElementType())->getReturnType(),
889 Instruction::Call, 0, 0, InsertAtEnd) {
890 init(Func, ArgBegin, ArgEnd, Name,
891 typename std::iterator_traits<InputIterator>::iterator_category());
894 CallInst(Value *F, Value *Actual, const std::string& Name = "",
895 Instruction *InsertBefore = 0);
896 CallInst(Value *F, Value *Actual, const std::string& Name,
897 BasicBlock *InsertAtEnd);
898 explicit CallInst(Value *F, const std::string &Name = "",
899 Instruction *InsertBefore = 0);
900 CallInst(Value *F, const std::string &Name, BasicBlock *InsertAtEnd);
903 virtual CallInst *clone() const;
905 bool isTailCall() const { return SubclassData & 1; }
906 void setTailCall(bool isTailCall = true) {
907 SubclassData = (SubclassData & ~1) | unsigned(isTailCall);
910 /// getCallingConv/setCallingConv - Get or set the calling convention of this
912 unsigned getCallingConv() const { return SubclassData >> 1; }
913 void setCallingConv(unsigned CC) {
914 SubclassData = (SubclassData & 1) | (CC << 1);
917 /// Obtains a pointer to the ParamAttrsList object which holds the
918 /// parameter attributes information, if any.
919 /// @returns 0 if no attributes have been set.
920 /// @brief Get the parameter attributes.
921 const ParamAttrsList *getParamAttrs() const { return ParamAttrs; }
923 /// Sets the parameter attributes for this CallInst. To construct a
924 /// ParamAttrsList, see ParameterAttributes.h
925 /// @brief Set the parameter attributes.
926 void setParamAttrs(const ParamAttrsList *attrs);
928 /// @brief Determine whether the call or the callee has the given attribute.
929 bool paramHasAttr(uint16_t i, unsigned attr) const;
931 /// @brief Determine if the call does not access memory.
932 bool doesNotAccessMemory() const;
934 /// @brief Determine if the call does not access or only reads memory.
935 bool onlyReadsMemory() const;
937 /// @brief Determine if the call cannot return.
938 bool doesNotReturn() const;
940 /// @brief Determine if the call cannot unwind.
941 bool doesNotThrow() const;
942 void setDoesNotThrow(bool doesNotThrow = true);
944 /// @brief Determine if the call returns a structure.
945 bool isStructReturn() const;
947 /// getCalledFunction - Return the function being called by this instruction
948 /// if it is a direct call. If it is a call through a function pointer,
950 Function *getCalledFunction() const {
951 return dyn_cast<Function>(getOperand(0));
954 /// getCalledValue - Get a pointer to the function that is invoked by this
956 inline const Value *getCalledValue() const { return getOperand(0); }
957 inline Value *getCalledValue() { return getOperand(0); }
959 // Methods for support type inquiry through isa, cast, and dyn_cast:
960 static inline bool classof(const CallInst *) { return true; }
961 static inline bool classof(const Instruction *I) {
962 return I->getOpcode() == Instruction::Call;
964 static inline bool classof(const Value *V) {
965 return isa<Instruction>(V) && classof(cast<Instruction>(V));
969 //===----------------------------------------------------------------------===//
971 //===----------------------------------------------------------------------===//
973 /// SelectInst - This class represents the LLVM 'select' instruction.
975 class SelectInst : public Instruction {
978 void init(Value *C, Value *S1, Value *S2) {
979 Ops[0].init(C, this);
980 Ops[1].init(S1, this);
981 Ops[2].init(S2, this);
984 SelectInst(const SelectInst &SI)
985 : Instruction(SI.getType(), SI.getOpcode(), Ops, 3) {
986 init(SI.Ops[0], SI.Ops[1], SI.Ops[2]);
989 SelectInst(Value *C, Value *S1, Value *S2, const std::string &Name = "",
990 Instruction *InsertBefore = 0)
991 : Instruction(S1->getType(), Instruction::Select, Ops, 3, InsertBefore) {
995 SelectInst(Value *C, Value *S1, Value *S2, const std::string &Name,
996 BasicBlock *InsertAtEnd)
997 : Instruction(S1->getType(), Instruction::Select, Ops, 3, InsertAtEnd) {
1002 Value *getCondition() const { return Ops[0]; }
1003 Value *getTrueValue() const { return Ops[1]; }
1004 Value *getFalseValue() const { return Ops[2]; }
1006 /// Transparently provide more efficient getOperand methods.
1007 Value *getOperand(unsigned i) const {
1008 assert(i < 3 && "getOperand() out of range!");
1011 void setOperand(unsigned i, Value *Val) {
1012 assert(i < 3 && "setOperand() out of range!");
1015 unsigned getNumOperands() const { return 3; }
1017 OtherOps getOpcode() const {
1018 return static_cast<OtherOps>(Instruction::getOpcode());
1021 virtual SelectInst *clone() const;
1023 // Methods for support type inquiry through isa, cast, and dyn_cast:
1024 static inline bool classof(const SelectInst *) { return true; }
1025 static inline bool classof(const Instruction *I) {
1026 return I->getOpcode() == Instruction::Select;
1028 static inline bool classof(const Value *V) {
1029 return isa<Instruction>(V) && classof(cast<Instruction>(V));
1033 //===----------------------------------------------------------------------===//
1035 //===----------------------------------------------------------------------===//
1037 /// VAArgInst - This class represents the va_arg llvm instruction, which returns
1038 /// an argument of the specified type given a va_list and increments that list
1040 class VAArgInst : public UnaryInstruction {
1041 VAArgInst(const VAArgInst &VAA)
1042 : UnaryInstruction(VAA.getType(), VAArg, VAA.getOperand(0)) {}
1044 VAArgInst(Value *List, const Type *Ty, const std::string &Name = "",
1045 Instruction *InsertBefore = 0)
1046 : UnaryInstruction(Ty, VAArg, List, InsertBefore) {
1049 VAArgInst(Value *List, const Type *Ty, const std::string &Name,
1050 BasicBlock *InsertAtEnd)
1051 : UnaryInstruction(Ty, VAArg, List, InsertAtEnd) {
1055 virtual VAArgInst *clone() const;
1057 // Methods for support type inquiry through isa, cast, and dyn_cast:
1058 static inline bool classof(const VAArgInst *) { return true; }
1059 static inline bool classof(const Instruction *I) {
1060 return I->getOpcode() == VAArg;
1062 static inline bool classof(const Value *V) {
1063 return isa<Instruction>(V) && classof(cast<Instruction>(V));
1067 //===----------------------------------------------------------------------===//
1068 // ExtractElementInst Class
1069 //===----------------------------------------------------------------------===//
1071 /// ExtractElementInst - This instruction extracts a single (scalar)
1072 /// element from a VectorType value
1074 class ExtractElementInst : public Instruction {
1076 ExtractElementInst(const ExtractElementInst &EE) :
1077 Instruction(EE.getType(), ExtractElement, Ops, 2) {
1078 Ops[0].init(EE.Ops[0], this);
1079 Ops[1].init(EE.Ops[1], this);
1083 ExtractElementInst(Value *Vec, Value *Idx, const std::string &Name = "",
1084 Instruction *InsertBefore = 0);
1085 ExtractElementInst(Value *Vec, unsigned Idx, const std::string &Name = "",
1086 Instruction *InsertBefore = 0);
1087 ExtractElementInst(Value *Vec, Value *Idx, const std::string &Name,
1088 BasicBlock *InsertAtEnd);
1089 ExtractElementInst(Value *Vec, unsigned Idx, const std::string &Name,
1090 BasicBlock *InsertAtEnd);
1092 /// isValidOperands - Return true if an extractelement instruction can be
1093 /// formed with the specified operands.
1094 static bool isValidOperands(const Value *Vec, const Value *Idx);
1096 virtual ExtractElementInst *clone() const;
1098 /// Transparently provide more efficient getOperand methods.
1099 Value *getOperand(unsigned i) const {
1100 assert(i < 2 && "getOperand() out of range!");
1103 void setOperand(unsigned i, Value *Val) {
1104 assert(i < 2 && "setOperand() out of range!");
1107 unsigned getNumOperands() const { return 2; }
1109 // Methods for support type inquiry through isa, cast, and dyn_cast:
1110 static inline bool classof(const ExtractElementInst *) { return true; }
1111 static inline bool classof(const Instruction *I) {
1112 return I->getOpcode() == Instruction::ExtractElement;
1114 static inline bool classof(const Value *V) {
1115 return isa<Instruction>(V) && classof(cast<Instruction>(V));
1119 //===----------------------------------------------------------------------===//
1120 // InsertElementInst Class
1121 //===----------------------------------------------------------------------===//
1123 /// InsertElementInst - This instruction inserts a single (scalar)
1124 /// element into a VectorType value
1126 class InsertElementInst : public Instruction {
1128 InsertElementInst(const InsertElementInst &IE);
1130 InsertElementInst(Value *Vec, Value *NewElt, Value *Idx,
1131 const std::string &Name = "",Instruction *InsertBefore = 0);
1132 InsertElementInst(Value *Vec, Value *NewElt, unsigned Idx,
1133 const std::string &Name = "",Instruction *InsertBefore = 0);
1134 InsertElementInst(Value *Vec, Value *NewElt, Value *Idx,
1135 const std::string &Name, BasicBlock *InsertAtEnd);
1136 InsertElementInst(Value *Vec, Value *NewElt, unsigned Idx,
1137 const std::string &Name, BasicBlock *InsertAtEnd);
1139 /// isValidOperands - Return true if an insertelement instruction can be
1140 /// formed with the specified operands.
1141 static bool isValidOperands(const Value *Vec, const Value *NewElt,
1144 virtual InsertElementInst *clone() const;
1146 /// getType - Overload to return most specific vector type.
1148 inline const VectorType *getType() const {
1149 return reinterpret_cast<const VectorType*>(Instruction::getType());
1152 /// Transparently provide more efficient getOperand methods.
1153 Value *getOperand(unsigned i) const {
1154 assert(i < 3 && "getOperand() out of range!");
1157 void setOperand(unsigned i, Value *Val) {
1158 assert(i < 3 && "setOperand() out of range!");
1161 unsigned getNumOperands() const { return 3; }
1163 // Methods for support type inquiry through isa, cast, and dyn_cast:
1164 static inline bool classof(const InsertElementInst *) { return true; }
1165 static inline bool classof(const Instruction *I) {
1166 return I->getOpcode() == Instruction::InsertElement;
1168 static inline bool classof(const Value *V) {
1169 return isa<Instruction>(V) && classof(cast<Instruction>(V));
1173 //===----------------------------------------------------------------------===//
1174 // ShuffleVectorInst Class
1175 //===----------------------------------------------------------------------===//
1177 /// ShuffleVectorInst - This instruction constructs a fixed permutation of two
1180 class ShuffleVectorInst : public Instruction {
1182 ShuffleVectorInst(const ShuffleVectorInst &IE);
1184 ShuffleVectorInst(Value *V1, Value *V2, Value *Mask,
1185 const std::string &Name = "", Instruction *InsertBefor = 0);
1186 ShuffleVectorInst(Value *V1, Value *V2, Value *Mask,
1187 const std::string &Name, BasicBlock *InsertAtEnd);
1189 /// isValidOperands - Return true if a shufflevector instruction can be
1190 /// formed with the specified operands.
1191 static bool isValidOperands(const Value *V1, const Value *V2,
1194 virtual ShuffleVectorInst *clone() const;
1196 /// getType - Overload to return most specific vector type.
1198 inline const VectorType *getType() const {
1199 return reinterpret_cast<const VectorType*>(Instruction::getType());
1202 /// Transparently provide more efficient getOperand methods.
1203 Value *getOperand(unsigned i) const {
1204 assert(i < 3 && "getOperand() out of range!");
1207 void setOperand(unsigned i, Value *Val) {
1208 assert(i < 3 && "setOperand() out of range!");
1211 unsigned getNumOperands() const { return 3; }
1213 // Methods for support type inquiry through isa, cast, and dyn_cast:
1214 static inline bool classof(const ShuffleVectorInst *) { return true; }
1215 static inline bool classof(const Instruction *I) {
1216 return I->getOpcode() == Instruction::ShuffleVector;
1218 static inline bool classof(const Value *V) {
1219 return isa<Instruction>(V) && classof(cast<Instruction>(V));
1224 //===----------------------------------------------------------------------===//
1226 //===----------------------------------------------------------------------===//
1228 // PHINode - The PHINode class is used to represent the magical mystical PHI
1229 // node, that can not exist in nature, but can be synthesized in a computer
1230 // scientist's overactive imagination.
1232 class PHINode : public Instruction {
1233 /// ReservedSpace - The number of operands actually allocated. NumOperands is
1234 /// the number actually in use.
1235 unsigned ReservedSpace;
1236 PHINode(const PHINode &PN);
1238 explicit PHINode(const Type *Ty, const std::string &Name = "",
1239 Instruction *InsertBefore = 0)
1240 : Instruction(Ty, Instruction::PHI, 0, 0, InsertBefore),
1245 PHINode(const Type *Ty, const std::string &Name, BasicBlock *InsertAtEnd)
1246 : Instruction(Ty, Instruction::PHI, 0, 0, InsertAtEnd),
1253 /// reserveOperandSpace - This method can be used to avoid repeated
1254 /// reallocation of PHI operand lists by reserving space for the correct
1255 /// number of operands before adding them. Unlike normal vector reserves,
1256 /// this method can also be used to trim the operand space.
1257 void reserveOperandSpace(unsigned NumValues) {
1258 resizeOperands(NumValues*2);
1261 virtual PHINode *clone() const;
1263 /// getNumIncomingValues - Return the number of incoming edges
1265 unsigned getNumIncomingValues() const { return getNumOperands()/2; }
1267 /// getIncomingValue - Return incoming value number x
1269 Value *getIncomingValue(unsigned i) const {
1270 assert(i*2 < getNumOperands() && "Invalid value number!");
1271 return getOperand(i*2);
1273 void setIncomingValue(unsigned i, Value *V) {
1274 assert(i*2 < getNumOperands() && "Invalid value number!");
1277 unsigned getOperandNumForIncomingValue(unsigned i) {
1281 /// getIncomingBlock - Return incoming basic block number x
1283 BasicBlock *getIncomingBlock(unsigned i) const {
1284 return reinterpret_cast<BasicBlock*>(getOperand(i*2+1));
1286 void setIncomingBlock(unsigned i, BasicBlock *BB) {
1287 setOperand(i*2+1, reinterpret_cast<Value*>(BB));
1289 unsigned getOperandNumForIncomingBlock(unsigned i) {
1293 /// addIncoming - Add an incoming value to the end of the PHI list
1295 void addIncoming(Value *V, BasicBlock *BB) {
1296 assert(getType() == V->getType() &&
1297 "All operands to PHI node must be the same type as the PHI node!");
1298 unsigned OpNo = NumOperands;
1299 if (OpNo+2 > ReservedSpace)
1300 resizeOperands(0); // Get more space!
1301 // Initialize some new operands.
1302 NumOperands = OpNo+2;
1303 OperandList[OpNo].init(V, this);
1304 OperandList[OpNo+1].init(reinterpret_cast<Value*>(BB), this);
1307 /// removeIncomingValue - Remove an incoming value. This is useful if a
1308 /// predecessor basic block is deleted. The value removed is returned.
1310 /// If the last incoming value for a PHI node is removed (and DeletePHIIfEmpty
1311 /// is true), the PHI node is destroyed and any uses of it are replaced with
1312 /// dummy values. The only time there should be zero incoming values to a PHI
1313 /// node is when the block is dead, so this strategy is sound.
1315 Value *removeIncomingValue(unsigned Idx, bool DeletePHIIfEmpty = true);
1317 Value *removeIncomingValue(const BasicBlock *BB, bool DeletePHIIfEmpty =true){
1318 int Idx = getBasicBlockIndex(BB);
1319 assert(Idx >= 0 && "Invalid basic block argument to remove!");
1320 return removeIncomingValue(Idx, DeletePHIIfEmpty);
1323 /// getBasicBlockIndex - Return the first index of the specified basic
1324 /// block in the value list for this PHI. Returns -1 if no instance.
1326 int getBasicBlockIndex(const BasicBlock *BB) const {
1327 Use *OL = OperandList;
1328 for (unsigned i = 0, e = getNumOperands(); i != e; i += 2)
1329 if (OL[i+1] == reinterpret_cast<const Value*>(BB)) return i/2;
1333 Value *getIncomingValueForBlock(const BasicBlock *BB) const {
1334 return getIncomingValue(getBasicBlockIndex(BB));
1337 /// hasConstantValue - If the specified PHI node always merges together the
1338 /// same value, return the value, otherwise return null.
1340 Value *hasConstantValue(bool AllowNonDominatingInstruction = false) const;
1342 /// Methods for support type inquiry through isa, cast, and dyn_cast:
1343 static inline bool classof(const PHINode *) { return true; }
1344 static inline bool classof(const Instruction *I) {
1345 return I->getOpcode() == Instruction::PHI;
1347 static inline bool classof(const Value *V) {
1348 return isa<Instruction>(V) && classof(cast<Instruction>(V));
1351 void resizeOperands(unsigned NumOperands);
1354 //===----------------------------------------------------------------------===//
1356 //===----------------------------------------------------------------------===//
1358 //===---------------------------------------------------------------------------
1359 /// ReturnInst - Return a value (possibly void), from a function. Execution
1360 /// does not continue in this function any longer.
1362 class ReturnInst : public TerminatorInst {
1363 Use RetVal; // Return Value: null if 'void'.
1364 ReturnInst(const ReturnInst &RI);
1365 void init(Value *RetVal);
1368 // ReturnInst constructors:
1369 // ReturnInst() - 'ret void' instruction
1370 // ReturnInst( null) - 'ret void' instruction
1371 // ReturnInst(Value* X) - 'ret X' instruction
1372 // ReturnInst( null, Inst *) - 'ret void' instruction, insert before I
1373 // ReturnInst(Value* X, Inst *I) - 'ret X' instruction, insert before I
1374 // ReturnInst( null, BB *B) - 'ret void' instruction, insert @ end of BB
1375 // ReturnInst(Value* X, BB *B) - 'ret X' instruction, insert @ end of BB
1377 // NOTE: If the Value* passed is of type void then the constructor behaves as
1378 // if it was passed NULL.
1379 explicit ReturnInst(Value *retVal = 0, Instruction *InsertBefore = 0);
1380 ReturnInst(Value *retVal, BasicBlock *InsertAtEnd);
1381 explicit ReturnInst(BasicBlock *InsertAtEnd);
1383 virtual ReturnInst *clone() const;
1385 // Transparently provide more efficient getOperand methods.
1386 Value *getOperand(unsigned i) const {
1387 assert(i < getNumOperands() && "getOperand() out of range!");
1390 void setOperand(unsigned i, Value *Val) {
1391 assert(i < getNumOperands() && "setOperand() out of range!");
1395 Value *getReturnValue() const { return RetVal; }
1397 unsigned getNumSuccessors() const { return 0; }
1399 // Methods for support type inquiry through isa, cast, and dyn_cast:
1400 static inline bool classof(const ReturnInst *) { return true; }
1401 static inline bool classof(const Instruction *I) {
1402 return (I->getOpcode() == Instruction::Ret);
1404 static inline bool classof(const Value *V) {
1405 return isa<Instruction>(V) && classof(cast<Instruction>(V));
1408 virtual BasicBlock *getSuccessorV(unsigned idx) const;
1409 virtual unsigned getNumSuccessorsV() const;
1410 virtual void setSuccessorV(unsigned idx, BasicBlock *B);
1413 //===----------------------------------------------------------------------===//
1415 //===----------------------------------------------------------------------===//
1417 //===---------------------------------------------------------------------------
1418 /// BranchInst - Conditional or Unconditional Branch instruction.
1420 class BranchInst : public TerminatorInst {
1421 /// Ops list - Branches are strange. The operands are ordered:
1422 /// TrueDest, FalseDest, Cond. This makes some accessors faster because
1423 /// they don't have to check for cond/uncond branchness.
1425 BranchInst(const BranchInst &BI);
1428 // BranchInst constructors (where {B, T, F} are blocks, and C is a condition):
1429 // BranchInst(BB *B) - 'br B'
1430 // BranchInst(BB* T, BB *F, Value *C) - 'br C, T, F'
1431 // BranchInst(BB* B, Inst *I) - 'br B' insert before I
1432 // BranchInst(BB* T, BB *F, Value *C, Inst *I) - 'br C, T, F', insert before I
1433 // BranchInst(BB* B, BB *I) - 'br B' insert at end
1434 // BranchInst(BB* T, BB *F, Value *C, BB *I) - 'br C, T, F', insert at end
1435 explicit BranchInst(BasicBlock *IfTrue, Instruction *InsertBefore = 0);
1436 BranchInst(BasicBlock *IfTrue, BasicBlock *IfFalse, Value *Cond,
1437 Instruction *InsertBefore = 0);
1438 BranchInst(BasicBlock *IfTrue, BasicBlock *InsertAtEnd);
1439 BranchInst(BasicBlock *IfTrue, BasicBlock *IfFalse, Value *Cond,
1440 BasicBlock *InsertAtEnd);
1442 /// Transparently provide more efficient getOperand methods.
1443 Value *getOperand(unsigned i) const {
1444 assert(i < getNumOperands() && "getOperand() out of range!");
1447 void setOperand(unsigned i, Value *Val) {
1448 assert(i < getNumOperands() && "setOperand() out of range!");
1452 virtual BranchInst *clone() const;
1454 inline bool isUnconditional() const { return getNumOperands() == 1; }
1455 inline bool isConditional() const { return getNumOperands() == 3; }
1457 inline Value *getCondition() const {
1458 assert(isConditional() && "Cannot get condition of an uncond branch!");
1459 return getOperand(2);
1462 void setCondition(Value *V) {
1463 assert(isConditional() && "Cannot set condition of unconditional branch!");
1467 // setUnconditionalDest - Change the current branch to an unconditional branch
1468 // targeting the specified block.
1469 // FIXME: Eliminate this ugly method.
1470 void setUnconditionalDest(BasicBlock *Dest) {
1471 if (isConditional()) { // Convert this to an uncond branch.
1476 setOperand(0, reinterpret_cast<Value*>(Dest));
1479 unsigned getNumSuccessors() const { return 1+isConditional(); }
1481 BasicBlock *getSuccessor(unsigned i) const {
1482 assert(i < getNumSuccessors() && "Successor # out of range for Branch!");
1483 return cast<BasicBlock>(getOperand(i));
1486 void setSuccessor(unsigned idx, BasicBlock *NewSucc) {
1487 assert(idx < getNumSuccessors() && "Successor # out of range for Branch!");
1488 setOperand(idx, reinterpret_cast<Value*>(NewSucc));
1491 // Methods for support type inquiry through isa, cast, and dyn_cast:
1492 static inline bool classof(const BranchInst *) { return true; }
1493 static inline bool classof(const Instruction *I) {
1494 return (I->getOpcode() == Instruction::Br);
1496 static inline bool classof(const Value *V) {
1497 return isa<Instruction>(V) && classof(cast<Instruction>(V));
1500 virtual BasicBlock *getSuccessorV(unsigned idx) const;
1501 virtual unsigned getNumSuccessorsV() const;
1502 virtual void setSuccessorV(unsigned idx, BasicBlock *B);
1505 //===----------------------------------------------------------------------===//
1507 //===----------------------------------------------------------------------===//
1509 //===---------------------------------------------------------------------------
1510 /// SwitchInst - Multiway switch
1512 class SwitchInst : public TerminatorInst {
1513 unsigned ReservedSpace;
1514 // Operand[0] = Value to switch on
1515 // Operand[1] = Default basic block destination
1516 // Operand[2n ] = Value to match
1517 // Operand[2n+1] = BasicBlock to go to on match
1518 SwitchInst(const SwitchInst &RI);
1519 void init(Value *Value, BasicBlock *Default, unsigned NumCases);
1520 void resizeOperands(unsigned No);
1522 /// SwitchInst ctor - Create a new switch instruction, specifying a value to
1523 /// switch on and a default destination. The number of additional cases can
1524 /// be specified here to make memory allocation more efficient. This
1525 /// constructor can also autoinsert before another instruction.
1526 SwitchInst(Value *Value, BasicBlock *Default, unsigned NumCases,
1527 Instruction *InsertBefore = 0);
1529 /// SwitchInst ctor - Create a new switch instruction, specifying a value to
1530 /// switch on and a default destination. The number of additional cases can
1531 /// be specified here to make memory allocation more efficient. This
1532 /// constructor also autoinserts at the end of the specified BasicBlock.
1533 SwitchInst(Value *Value, BasicBlock *Default, unsigned NumCases,
1534 BasicBlock *InsertAtEnd);
1538 // Accessor Methods for Switch stmt
1539 inline Value *getCondition() const { return getOperand(0); }
1540 void setCondition(Value *V) { setOperand(0, V); }
1542 inline BasicBlock *getDefaultDest() const {
1543 return cast<BasicBlock>(getOperand(1));
1546 /// getNumCases - return the number of 'cases' in this switch instruction.
1547 /// Note that case #0 is always the default case.
1548 unsigned getNumCases() const {
1549 return getNumOperands()/2;
1552 /// getCaseValue - Return the specified case value. Note that case #0, the
1553 /// default destination, does not have a case value.
1554 ConstantInt *getCaseValue(unsigned i) {
1555 assert(i && i < getNumCases() && "Illegal case value to get!");
1556 return getSuccessorValue(i);
1559 /// getCaseValue - Return the specified case value. Note that case #0, the
1560 /// default destination, does not have a case value.
1561 const ConstantInt *getCaseValue(unsigned i) const {
1562 assert(i && i < getNumCases() && "Illegal case value to get!");
1563 return getSuccessorValue(i);
1566 /// findCaseValue - Search all of the case values for the specified constant.
1567 /// If it is explicitly handled, return the case number of it, otherwise
1568 /// return 0 to indicate that it is handled by the default handler.
1569 unsigned findCaseValue(const ConstantInt *C) const {
1570 for (unsigned i = 1, e = getNumCases(); i != e; ++i)
1571 if (getCaseValue(i) == C)
1576 /// findCaseDest - Finds the unique case value for a given successor. Returns
1577 /// null if the successor is not found, not unique, or is the default case.
1578 ConstantInt *findCaseDest(BasicBlock *BB) {
1579 if (BB == getDefaultDest()) return NULL;
1581 ConstantInt *CI = NULL;
1582 for (unsigned i = 1, e = getNumCases(); i != e; ++i) {
1583 if (getSuccessor(i) == BB) {
1584 if (CI) return NULL; // Multiple cases lead to BB.
1585 else CI = getCaseValue(i);
1591 /// addCase - Add an entry to the switch instruction...
1593 void addCase(ConstantInt *OnVal, BasicBlock *Dest);
1595 /// removeCase - This method removes the specified successor from the switch
1596 /// instruction. Note that this cannot be used to remove the default
1597 /// destination (successor #0).
1599 void removeCase(unsigned idx);
1601 virtual SwitchInst *clone() const;
1603 unsigned getNumSuccessors() const { return getNumOperands()/2; }
1604 BasicBlock *getSuccessor(unsigned idx) const {
1605 assert(idx < getNumSuccessors() &&"Successor idx out of range for switch!");
1606 return cast<BasicBlock>(getOperand(idx*2+1));
1608 void setSuccessor(unsigned idx, BasicBlock *NewSucc) {
1609 assert(idx < getNumSuccessors() && "Successor # out of range for switch!");
1610 setOperand(idx*2+1, reinterpret_cast<Value*>(NewSucc));
1613 // getSuccessorValue - Return the value associated with the specified
1615 inline ConstantInt *getSuccessorValue(unsigned idx) const {
1616 assert(idx < getNumSuccessors() && "Successor # out of range!");
1617 return reinterpret_cast<ConstantInt*>(getOperand(idx*2));
1620 // Methods for support type inquiry through isa, cast, and dyn_cast:
1621 static inline bool classof(const SwitchInst *) { return true; }
1622 static inline bool classof(const Instruction *I) {
1623 return I->getOpcode() == Instruction::Switch;
1625 static inline bool classof(const Value *V) {
1626 return isa<Instruction>(V) && classof(cast<Instruction>(V));
1629 virtual BasicBlock *getSuccessorV(unsigned idx) const;
1630 virtual unsigned getNumSuccessorsV() const;
1631 virtual void setSuccessorV(unsigned idx, BasicBlock *B);
1634 //===----------------------------------------------------------------------===//
1636 //===----------------------------------------------------------------------===//
1638 //===---------------------------------------------------------------------------
1640 /// InvokeInst - Invoke instruction. The SubclassData field is used to hold the
1641 /// calling convention of the call.
1643 class InvokeInst : public TerminatorInst {
1644 const ParamAttrsList *ParamAttrs;
1645 InvokeInst(const InvokeInst &BI);
1646 void init(Value *Fn, BasicBlock *IfNormal, BasicBlock *IfException,
1647 Value* const *Args, unsigned NumArgs);
1649 template<typename InputIterator>
1650 void init(Value *Func, BasicBlock *IfNormal, BasicBlock *IfException,
1651 InputIterator ArgBegin, InputIterator ArgEnd,
1652 const std::string &Name,
1653 // This argument ensures that we have an iterator we can
1654 // do arithmetic on in constant time
1655 std::random_access_iterator_tag) {
1656 unsigned NumArgs = (unsigned)std::distance(ArgBegin, ArgEnd);
1658 // This requires that the iterator points to contiguous memory.
1659 init(Func, IfNormal, IfException, NumArgs ? &*ArgBegin : 0, NumArgs);
1664 /// Construct an InvokeInst given a range of arguments.
1665 /// InputIterator must be a random-access iterator pointing to
1666 /// contiguous storage (e.g. a std::vector<>::iterator). Checks are
1667 /// made for random-accessness but not for contiguous storage as
1668 /// that would incur runtime overhead.
1670 /// @brief Construct an InvokeInst from a range of arguments
1671 template<typename InputIterator>
1672 InvokeInst(Value *Func, BasicBlock *IfNormal, BasicBlock *IfException,
1673 InputIterator ArgBegin, InputIterator ArgEnd,
1674 const std::string &Name = "", Instruction *InsertBefore = 0)
1675 : TerminatorInst(cast<FunctionType>(cast<PointerType>(Func->getType())
1676 ->getElementType())->getReturnType(),
1677 Instruction::Invoke, 0, 0, InsertBefore) {
1678 init(Func, IfNormal, IfException, ArgBegin, ArgEnd, Name,
1679 typename std::iterator_traits<InputIterator>::iterator_category());
1682 /// Construct an InvokeInst given a range of arguments.
1683 /// InputIterator must be a random-access iterator pointing to
1684 /// contiguous storage (e.g. a std::vector<>::iterator). Checks are
1685 /// made for random-accessness but not for contiguous storage as
1686 /// that would incur runtime overhead.
1688 /// @brief Construct an InvokeInst from a range of arguments
1689 template<typename InputIterator>
1690 InvokeInst(Value *Func, BasicBlock *IfNormal, BasicBlock *IfException,
1691 InputIterator ArgBegin, InputIterator ArgEnd,
1692 const std::string &Name, BasicBlock *InsertAtEnd)
1693 : TerminatorInst(cast<FunctionType>(cast<PointerType>(Func->getType())
1694 ->getElementType())->getReturnType(),
1695 Instruction::Invoke, 0, 0, InsertAtEnd) {
1696 init(Func, IfNormal, IfException, ArgBegin, ArgEnd, Name,
1697 typename std::iterator_traits<InputIterator>::iterator_category());
1702 virtual InvokeInst *clone() const;
1704 /// getCallingConv/setCallingConv - Get or set the calling convention of this
1706 unsigned getCallingConv() const { return SubclassData; }
1707 void setCallingConv(unsigned CC) {
1711 /// Obtains a pointer to the ParamAttrsList object which holds the
1712 /// parameter attributes information, if any.
1713 /// @returns 0 if no attributes have been set.
1714 /// @brief Get the parameter attributes.
1715 const ParamAttrsList *getParamAttrs() const { return ParamAttrs; }
1717 /// Sets the parameter attributes for this InvokeInst. To construct a
1718 /// ParamAttrsList, see ParameterAttributes.h
1719 /// @brief Set the parameter attributes.
1720 void setParamAttrs(const ParamAttrsList *attrs);
1722 /// @brief Determine whether the call or the callee has the given attribute.
1723 bool paramHasAttr(uint16_t i, unsigned attr) const;
1725 /// @brief Determine if the call does not access memory.
1726 bool doesNotAccessMemory() const;
1728 /// @brief Determine if the call does not access or only reads memory.
1729 bool onlyReadsMemory() const;
1731 /// @brief Determine if the call cannot return.
1732 bool doesNotReturn() const;
1734 /// @brief Determine if the call cannot unwind.
1735 bool doesNotThrow() const;
1736 void setDoesNotThrow(bool doesNotThrow = true);
1738 /// @brief Determine if the call returns a structure.
1739 bool isStructReturn() const;
1741 /// getCalledFunction - Return the function called, or null if this is an
1742 /// indirect function invocation.
1744 Function *getCalledFunction() const {
1745 return dyn_cast<Function>(getOperand(0));
1748 // getCalledValue - Get a pointer to a function that is invoked by this inst.
1749 inline Value *getCalledValue() const { return getOperand(0); }
1751 // get*Dest - Return the destination basic blocks...
1752 BasicBlock *getNormalDest() const {
1753 return cast<BasicBlock>(getOperand(1));
1755 BasicBlock *getUnwindDest() const {
1756 return cast<BasicBlock>(getOperand(2));
1758 void setNormalDest(BasicBlock *B) {
1759 setOperand(1, reinterpret_cast<Value*>(B));
1762 void setUnwindDest(BasicBlock *B) {
1763 setOperand(2, reinterpret_cast<Value*>(B));
1766 inline BasicBlock *getSuccessor(unsigned i) const {
1767 assert(i < 2 && "Successor # out of range for invoke!");
1768 return i == 0 ? getNormalDest() : getUnwindDest();
1771 void setSuccessor(unsigned idx, BasicBlock *NewSucc) {
1772 assert(idx < 2 && "Successor # out of range for invoke!");
1773 setOperand(idx+1, reinterpret_cast<Value*>(NewSucc));
1776 unsigned getNumSuccessors() const { return 2; }
1778 // Methods for support type inquiry through isa, cast, and dyn_cast:
1779 static inline bool classof(const InvokeInst *) { return true; }
1780 static inline bool classof(const Instruction *I) {
1781 return (I->getOpcode() == Instruction::Invoke);
1783 static inline bool classof(const Value *V) {
1784 return isa<Instruction>(V) && classof(cast<Instruction>(V));
1787 virtual BasicBlock *getSuccessorV(unsigned idx) const;
1788 virtual unsigned getNumSuccessorsV() const;
1789 virtual void setSuccessorV(unsigned idx, BasicBlock *B);
1793 //===----------------------------------------------------------------------===//
1795 //===----------------------------------------------------------------------===//
1797 //===---------------------------------------------------------------------------
1798 /// UnwindInst - Immediately exit the current function, unwinding the stack
1799 /// until an invoke instruction is found.
1801 class UnwindInst : public TerminatorInst {
1803 explicit UnwindInst(Instruction *InsertBefore = 0);
1804 explicit UnwindInst(BasicBlock *InsertAtEnd);
1806 virtual UnwindInst *clone() const;
1808 unsigned getNumSuccessors() const { return 0; }
1810 // Methods for support type inquiry through isa, cast, and dyn_cast:
1811 static inline bool classof(const UnwindInst *) { return true; }
1812 static inline bool classof(const Instruction *I) {
1813 return I->getOpcode() == Instruction::Unwind;
1815 static inline bool classof(const Value *V) {
1816 return isa<Instruction>(V) && classof(cast<Instruction>(V));
1819 virtual BasicBlock *getSuccessorV(unsigned idx) const;
1820 virtual unsigned getNumSuccessorsV() const;
1821 virtual void setSuccessorV(unsigned idx, BasicBlock *B);
1824 //===----------------------------------------------------------------------===//
1825 // UnreachableInst Class
1826 //===----------------------------------------------------------------------===//
1828 //===---------------------------------------------------------------------------
1829 /// UnreachableInst - This function has undefined behavior. In particular, the
1830 /// presence of this instruction indicates some higher level knowledge that the
1831 /// end of the block cannot be reached.
1833 class UnreachableInst : public TerminatorInst {
1835 explicit UnreachableInst(Instruction *InsertBefore = 0);
1836 explicit UnreachableInst(BasicBlock *InsertAtEnd);
1838 virtual UnreachableInst *clone() const;
1840 unsigned getNumSuccessors() const { return 0; }
1842 // Methods for support type inquiry through isa, cast, and dyn_cast:
1843 static inline bool classof(const UnreachableInst *) { return true; }
1844 static inline bool classof(const Instruction *I) {
1845 return I->getOpcode() == Instruction::Unreachable;
1847 static inline bool classof(const Value *V) {
1848 return isa<Instruction>(V) && classof(cast<Instruction>(V));
1851 virtual BasicBlock *getSuccessorV(unsigned idx) const;
1852 virtual unsigned getNumSuccessorsV() const;
1853 virtual void setSuccessorV(unsigned idx, BasicBlock *B);
1856 //===----------------------------------------------------------------------===//
1858 //===----------------------------------------------------------------------===//
1860 /// @brief This class represents a truncation of integer types.
1861 class TruncInst : public CastInst {
1862 /// Private copy constructor
1863 TruncInst(const TruncInst &CI)
1864 : CastInst(CI.getType(), Trunc, CI.getOperand(0)) {
1867 /// @brief Constructor with insert-before-instruction semantics
1869 Value *S, ///< The value to be truncated
1870 const Type *Ty, ///< The (smaller) type to truncate to
1871 const std::string &Name = "", ///< A name for the new instruction
1872 Instruction *InsertBefore = 0 ///< Where to insert the new instruction
1875 /// @brief Constructor with insert-at-end-of-block semantics
1877 Value *S, ///< The value to be truncated
1878 const Type *Ty, ///< The (smaller) type to truncate to
1879 const std::string &Name, ///< A name for the new instruction
1880 BasicBlock *InsertAtEnd ///< The block to insert the instruction into
1883 /// @brief Clone an identical TruncInst
1884 virtual CastInst *clone() const;
1886 /// @brief Methods for support type inquiry through isa, cast, and dyn_cast:
1887 static inline bool classof(const TruncInst *) { return true; }
1888 static inline bool classof(const Instruction *I) {
1889 return I->getOpcode() == Trunc;
1891 static inline bool classof(const Value *V) {
1892 return isa<Instruction>(V) && classof(cast<Instruction>(V));
1896 //===----------------------------------------------------------------------===//
1898 //===----------------------------------------------------------------------===//
1900 /// @brief This class represents zero extension of integer types.
1901 class ZExtInst : public CastInst {
1902 /// @brief Private copy constructor
1903 ZExtInst(const ZExtInst &CI)
1904 : CastInst(CI.getType(), ZExt, CI.getOperand(0)) {
1907 /// @brief Constructor with insert-before-instruction semantics
1909 Value *S, ///< The value to be zero extended
1910 const Type *Ty, ///< The type to zero extend to
1911 const std::string &Name = "", ///< A name for the new instruction
1912 Instruction *InsertBefore = 0 ///< Where to insert the new instruction
1915 /// @brief Constructor with insert-at-end semantics.
1917 Value *S, ///< The value to be zero extended
1918 const Type *Ty, ///< The type to zero extend to
1919 const std::string &Name, ///< A name for the new instruction
1920 BasicBlock *InsertAtEnd ///< The block to insert the instruction into
1923 /// @brief Clone an identical ZExtInst
1924 virtual CastInst *clone() const;
1926 /// @brief Methods for support type inquiry through isa, cast, and dyn_cast:
1927 static inline bool classof(const ZExtInst *) { return true; }
1928 static inline bool classof(const Instruction *I) {
1929 return I->getOpcode() == ZExt;
1931 static inline bool classof(const Value *V) {
1932 return isa<Instruction>(V) && classof(cast<Instruction>(V));
1936 //===----------------------------------------------------------------------===//
1938 //===----------------------------------------------------------------------===//
1940 /// @brief This class represents a sign extension of integer types.
1941 class SExtInst : public CastInst {
1942 /// @brief Private copy constructor
1943 SExtInst(const SExtInst &CI)
1944 : CastInst(CI.getType(), SExt, CI.getOperand(0)) {
1947 /// @brief Constructor with insert-before-instruction semantics
1949 Value *S, ///< The value to be sign extended
1950 const Type *Ty, ///< The type to sign extend to
1951 const std::string &Name = "", ///< A name for the new instruction
1952 Instruction *InsertBefore = 0 ///< Where to insert the new instruction
1955 /// @brief Constructor with insert-at-end-of-block semantics
1957 Value *S, ///< The value to be sign extended
1958 const Type *Ty, ///< The type to sign extend to
1959 const std::string &Name, ///< A name for the new instruction
1960 BasicBlock *InsertAtEnd ///< The block to insert the instruction into
1963 /// @brief Clone an identical SExtInst
1964 virtual CastInst *clone() const;
1966 /// @brief Methods for support type inquiry through isa, cast, and dyn_cast:
1967 static inline bool classof(const SExtInst *) { return true; }
1968 static inline bool classof(const Instruction *I) {
1969 return I->getOpcode() == SExt;
1971 static inline bool classof(const Value *V) {
1972 return isa<Instruction>(V) && classof(cast<Instruction>(V));
1976 //===----------------------------------------------------------------------===//
1977 // FPTruncInst Class
1978 //===----------------------------------------------------------------------===//
1980 /// @brief This class represents a truncation of floating point types.
1981 class FPTruncInst : public CastInst {
1982 FPTruncInst(const FPTruncInst &CI)
1983 : CastInst(CI.getType(), FPTrunc, CI.getOperand(0)) {
1986 /// @brief Constructor with insert-before-instruction semantics
1988 Value *S, ///< The value to be truncated
1989 const Type *Ty, ///< The type to truncate to
1990 const std::string &Name = "", ///< A name for the new instruction
1991 Instruction *InsertBefore = 0 ///< Where to insert the new instruction
1994 /// @brief Constructor with insert-before-instruction semantics
1996 Value *S, ///< The value to be truncated
1997 const Type *Ty, ///< The type to truncate to
1998 const std::string &Name, ///< A name for the new instruction
1999 BasicBlock *InsertAtEnd ///< The block to insert the instruction into
2002 /// @brief Clone an identical FPTruncInst
2003 virtual CastInst *clone() const;
2005 /// @brief Methods for support type inquiry through isa, cast, and dyn_cast:
2006 static inline bool classof(const FPTruncInst *) { return true; }
2007 static inline bool classof(const Instruction *I) {
2008 return I->getOpcode() == FPTrunc;
2010 static inline bool classof(const Value *V) {
2011 return isa<Instruction>(V) && classof(cast<Instruction>(V));
2015 //===----------------------------------------------------------------------===//
2017 //===----------------------------------------------------------------------===//
2019 /// @brief This class represents an extension of floating point types.
2020 class FPExtInst : public CastInst {
2021 FPExtInst(const FPExtInst &CI)
2022 : CastInst(CI.getType(), FPExt, CI.getOperand(0)) {
2025 /// @brief Constructor with insert-before-instruction semantics
2027 Value *S, ///< The value to be extended
2028 const Type *Ty, ///< The type to extend to
2029 const std::string &Name = "", ///< A name for the new instruction
2030 Instruction *InsertBefore = 0 ///< Where to insert the new instruction
2033 /// @brief Constructor with insert-at-end-of-block semantics
2035 Value *S, ///< The value to be extended
2036 const Type *Ty, ///< The type to extend to
2037 const std::string &Name, ///< A name for the new instruction
2038 BasicBlock *InsertAtEnd ///< The block to insert the instruction into
2041 /// @brief Clone an identical FPExtInst
2042 virtual CastInst *clone() const;
2044 /// @brief Methods for support type inquiry through isa, cast, and dyn_cast:
2045 static inline bool classof(const FPExtInst *) { return true; }
2046 static inline bool classof(const Instruction *I) {
2047 return I->getOpcode() == FPExt;
2049 static inline bool classof(const Value *V) {
2050 return isa<Instruction>(V) && classof(cast<Instruction>(V));
2054 //===----------------------------------------------------------------------===//
2056 //===----------------------------------------------------------------------===//
2058 /// @brief This class represents a cast unsigned integer to floating point.
2059 class UIToFPInst : public CastInst {
2060 UIToFPInst(const UIToFPInst &CI)
2061 : CastInst(CI.getType(), UIToFP, CI.getOperand(0)) {
2064 /// @brief Constructor with insert-before-instruction semantics
2066 Value *S, ///< The value to be converted
2067 const Type *Ty, ///< The type to convert to
2068 const std::string &Name = "", ///< A name for the new instruction
2069 Instruction *InsertBefore = 0 ///< Where to insert the new instruction
2072 /// @brief Constructor with insert-at-end-of-block semantics
2074 Value *S, ///< The value to be converted
2075 const Type *Ty, ///< The type to convert to
2076 const std::string &Name, ///< A name for the new instruction
2077 BasicBlock *InsertAtEnd ///< The block to insert the instruction into
2080 /// @brief Clone an identical UIToFPInst
2081 virtual CastInst *clone() const;
2083 /// @brief Methods for support type inquiry through isa, cast, and dyn_cast:
2084 static inline bool classof(const UIToFPInst *) { return true; }
2085 static inline bool classof(const Instruction *I) {
2086 return I->getOpcode() == UIToFP;
2088 static inline bool classof(const Value *V) {
2089 return isa<Instruction>(V) && classof(cast<Instruction>(V));
2093 //===----------------------------------------------------------------------===//
2095 //===----------------------------------------------------------------------===//
2097 /// @brief This class represents a cast from signed integer to floating point.
2098 class SIToFPInst : public CastInst {
2099 SIToFPInst(const SIToFPInst &CI)
2100 : CastInst(CI.getType(), SIToFP, CI.getOperand(0)) {
2103 /// @brief Constructor with insert-before-instruction semantics
2105 Value *S, ///< The value to be converted
2106 const Type *Ty, ///< The type to convert to
2107 const std::string &Name = "", ///< A name for the new instruction
2108 Instruction *InsertBefore = 0 ///< Where to insert the new instruction
2111 /// @brief Constructor with insert-at-end-of-block semantics
2113 Value *S, ///< The value to be converted
2114 const Type *Ty, ///< The type to convert to
2115 const std::string &Name, ///< A name for the new instruction
2116 BasicBlock *InsertAtEnd ///< The block to insert the instruction into
2119 /// @brief Clone an identical SIToFPInst
2120 virtual CastInst *clone() const;
2122 /// @brief Methods for support type inquiry through isa, cast, and dyn_cast:
2123 static inline bool classof(const SIToFPInst *) { return true; }
2124 static inline bool classof(const Instruction *I) {
2125 return I->getOpcode() == SIToFP;
2127 static inline bool classof(const Value *V) {
2128 return isa<Instruction>(V) && classof(cast<Instruction>(V));
2132 //===----------------------------------------------------------------------===//
2134 //===----------------------------------------------------------------------===//
2136 /// @brief This class represents a cast from floating point to unsigned integer
2137 class FPToUIInst : public CastInst {
2138 FPToUIInst(const FPToUIInst &CI)
2139 : CastInst(CI.getType(), FPToUI, CI.getOperand(0)) {
2142 /// @brief Constructor with insert-before-instruction semantics
2144 Value *S, ///< The value to be converted
2145 const Type *Ty, ///< The type to convert to
2146 const std::string &Name = "", ///< A name for the new instruction
2147 Instruction *InsertBefore = 0 ///< Where to insert the new instruction
2150 /// @brief Constructor with insert-at-end-of-block semantics
2152 Value *S, ///< The value to be converted
2153 const Type *Ty, ///< The type to convert to
2154 const std::string &Name, ///< A name for the new instruction
2155 BasicBlock *InsertAtEnd ///< Where to insert the new instruction
2158 /// @brief Clone an identical FPToUIInst
2159 virtual CastInst *clone() const;
2161 /// @brief Methods for support type inquiry through isa, cast, and dyn_cast:
2162 static inline bool classof(const FPToUIInst *) { return true; }
2163 static inline bool classof(const Instruction *I) {
2164 return I->getOpcode() == FPToUI;
2166 static inline bool classof(const Value *V) {
2167 return isa<Instruction>(V) && classof(cast<Instruction>(V));
2171 //===----------------------------------------------------------------------===//
2173 //===----------------------------------------------------------------------===//
2175 /// @brief This class represents a cast from floating point to signed integer.
2176 class FPToSIInst : public CastInst {
2177 FPToSIInst(const FPToSIInst &CI)
2178 : CastInst(CI.getType(), FPToSI, CI.getOperand(0)) {
2181 /// @brief Constructor with insert-before-instruction semantics
2183 Value *S, ///< The value to be converted
2184 const Type *Ty, ///< The type to convert to
2185 const std::string &Name = "", ///< A name for the new instruction
2186 Instruction *InsertBefore = 0 ///< Where to insert the new instruction
2189 /// @brief Constructor with insert-at-end-of-block semantics
2191 Value *S, ///< The value to be converted
2192 const Type *Ty, ///< The type to convert to
2193 const std::string &Name, ///< A name for the new instruction
2194 BasicBlock *InsertAtEnd ///< The block to insert the instruction into
2197 /// @brief Clone an identical FPToSIInst
2198 virtual CastInst *clone() const;
2200 /// @brief Methods for support type inquiry through isa, cast, and dyn_cast:
2201 static inline bool classof(const FPToSIInst *) { return true; }
2202 static inline bool classof(const Instruction *I) {
2203 return I->getOpcode() == FPToSI;
2205 static inline bool classof(const Value *V) {
2206 return isa<Instruction>(V) && classof(cast<Instruction>(V));
2210 //===----------------------------------------------------------------------===//
2211 // IntToPtrInst Class
2212 //===----------------------------------------------------------------------===//
2214 /// @brief This class represents a cast from an integer to a pointer.
2215 class IntToPtrInst : public CastInst {
2216 IntToPtrInst(const IntToPtrInst &CI)
2217 : CastInst(CI.getType(), IntToPtr, CI.getOperand(0)) {
2220 /// @brief Constructor with insert-before-instruction semantics
2222 Value *S, ///< The value to be converted
2223 const Type *Ty, ///< The type to convert to
2224 const std::string &Name = "", ///< A name for the new instruction
2225 Instruction *InsertBefore = 0 ///< Where to insert the new instruction
2228 /// @brief Constructor with insert-at-end-of-block semantics
2230 Value *S, ///< The value to be converted
2231 const Type *Ty, ///< The type to convert to
2232 const std::string &Name, ///< A name for the new instruction
2233 BasicBlock *InsertAtEnd ///< The block to insert the instruction into
2236 /// @brief Clone an identical IntToPtrInst
2237 virtual CastInst *clone() const;
2239 // Methods for support type inquiry through isa, cast, and dyn_cast:
2240 static inline bool classof(const IntToPtrInst *) { return true; }
2241 static inline bool classof(const Instruction *I) {
2242 return I->getOpcode() == IntToPtr;
2244 static inline bool classof(const Value *V) {
2245 return isa<Instruction>(V) && classof(cast<Instruction>(V));
2249 //===----------------------------------------------------------------------===//
2250 // PtrToIntInst Class
2251 //===----------------------------------------------------------------------===//
2253 /// @brief This class represents a cast from a pointer to an integer
2254 class PtrToIntInst : public CastInst {
2255 PtrToIntInst(const PtrToIntInst &CI)
2256 : CastInst(CI.getType(), PtrToInt, CI.getOperand(0)) {
2259 /// @brief Constructor with insert-before-instruction semantics
2261 Value *S, ///< The value to be converted
2262 const Type *Ty, ///< The type to convert to
2263 const std::string &Name = "", ///< A name for the new instruction
2264 Instruction *InsertBefore = 0 ///< Where to insert the new instruction
2267 /// @brief Constructor with insert-at-end-of-block semantics
2269 Value *S, ///< The value to be converted
2270 const Type *Ty, ///< The type to convert to
2271 const std::string &Name, ///< A name for the new instruction
2272 BasicBlock *InsertAtEnd ///< The block to insert the instruction into
2275 /// @brief Clone an identical PtrToIntInst
2276 virtual CastInst *clone() const;
2278 // Methods for support type inquiry through isa, cast, and dyn_cast:
2279 static inline bool classof(const PtrToIntInst *) { return true; }
2280 static inline bool classof(const Instruction *I) {
2281 return I->getOpcode() == PtrToInt;
2283 static inline bool classof(const Value *V) {
2284 return isa<Instruction>(V) && classof(cast<Instruction>(V));
2288 //===----------------------------------------------------------------------===//
2289 // BitCastInst Class
2290 //===----------------------------------------------------------------------===//
2292 /// @brief This class represents a no-op cast from one type to another.
2293 class BitCastInst : public CastInst {
2294 BitCastInst(const BitCastInst &CI)
2295 : CastInst(CI.getType(), BitCast, CI.getOperand(0)) {
2298 /// @brief Constructor with insert-before-instruction semantics
2300 Value *S, ///< The value to be casted
2301 const Type *Ty, ///< The type to casted to
2302 const std::string &Name = "", ///< A name for the new instruction
2303 Instruction *InsertBefore = 0 ///< Where to insert the new instruction
2306 /// @brief Constructor with insert-at-end-of-block semantics
2308 Value *S, ///< The value to be casted
2309 const Type *Ty, ///< The type to casted to
2310 const std::string &Name, ///< A name for the new instruction
2311 BasicBlock *InsertAtEnd ///< The block to insert the instruction into
2314 /// @brief Clone an identical BitCastInst
2315 virtual CastInst *clone() const;
2317 // Methods for support type inquiry through isa, cast, and dyn_cast:
2318 static inline bool classof(const BitCastInst *) { return true; }
2319 static inline bool classof(const Instruction *I) {
2320 return I->getOpcode() == BitCast;
2322 static inline bool classof(const Value *V) {
2323 return isa<Instruction>(V) && classof(cast<Instruction>(V));
2327 } // End llvm namespace