1 //===-- llvm/InstrTypes.h - Important Instruction subclasses ----*- 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 defines various meta classes of instructions that exist in the VM
11 // representation. Specific concrete subclasses of these may be found in the
14 //===----------------------------------------------------------------------===//
16 #ifndef LLVM_INSTRUCTION_TYPES_H
17 #define LLVM_INSTRUCTION_TYPES_H
19 #include "llvm/Instruction.h"
20 #include "llvm/OperandTraits.h"
21 #include "llvm/Operator.h"
22 #include "llvm/DerivedTypes.h"
28 //===----------------------------------------------------------------------===//
29 // TerminatorInst Class
30 //===----------------------------------------------------------------------===//
32 /// TerminatorInst - Subclasses of this class are all able to terminate a basic
33 /// block. Thus, these are all the flow control type of operations.
35 class TerminatorInst : public Instruction {
37 TerminatorInst(const Type *Ty, Instruction::TermOps iType,
38 Use *Ops, unsigned NumOps,
39 Instruction *InsertBefore = 0)
40 : Instruction(Ty, iType, Ops, NumOps, InsertBefore) {}
42 TerminatorInst(const Type *Ty, Instruction::TermOps iType,
43 Use *Ops, unsigned NumOps, BasicBlock *InsertAtEnd)
44 : Instruction(Ty, iType, Ops, NumOps, InsertAtEnd) {}
46 // Out of line virtual method, so the vtable, etc has a home.
49 /// Virtual methods - Terminators should overload these and provide inline
50 /// overrides of non-V methods.
51 virtual BasicBlock *getSuccessorV(unsigned idx) const = 0;
52 virtual unsigned getNumSuccessorsV() const = 0;
53 virtual void setSuccessorV(unsigned idx, BasicBlock *B) = 0;
56 virtual Instruction *clone(LLVMContext &Context) const = 0;
58 /// getNumSuccessors - Return the number of successors that this terminator
60 unsigned getNumSuccessors() const {
61 return getNumSuccessorsV();
64 /// getSuccessor - Return the specified successor.
66 BasicBlock *getSuccessor(unsigned idx) const {
67 return getSuccessorV(idx);
70 /// setSuccessor - Update the specified successor to point at the provided
72 void setSuccessor(unsigned idx, BasicBlock *B) {
73 setSuccessorV(idx, B);
76 // Methods for support type inquiry through isa, cast, and dyn_cast:
77 static inline bool classof(const TerminatorInst *) { return true; }
78 static inline bool classof(const Instruction *I) {
79 return I->isTerminator();
81 static inline bool classof(const Value *V) {
82 return isa<Instruction>(V) && classof(cast<Instruction>(V));
87 //===----------------------------------------------------------------------===//
88 // UnaryInstruction Class
89 //===----------------------------------------------------------------------===//
91 class UnaryInstruction : public Instruction {
92 void *operator new(size_t, unsigned); // Do not implement
93 UnaryInstruction(const UnaryInstruction&); // Do not implement
96 UnaryInstruction(const Type *Ty, unsigned iType, Value *V,
98 : Instruction(Ty, iType, &Op<0>(), 1, IB) {
101 UnaryInstruction(const Type *Ty, unsigned iType, Value *V, BasicBlock *IAE)
102 : Instruction(Ty, iType, &Op<0>(), 1, IAE) {
106 // allocate space for exactly one operand
107 void *operator new(size_t s) {
108 return User::operator new(s, 1);
111 // Out of line virtual method, so the vtable, etc has a home.
114 /// Transparently provide more efficient getOperand methods.
115 DECLARE_TRANSPARENT_OPERAND_ACCESSORS(Value);
117 // Methods for support type inquiry through isa, cast, and dyn_cast:
118 static inline bool classof(const UnaryInstruction *) { return true; }
119 static inline bool classof(const Instruction *I) {
120 return I->getOpcode() == Instruction::Malloc ||
121 I->getOpcode() == Instruction::Alloca ||
122 I->getOpcode() == Instruction::Free ||
123 I->getOpcode() == Instruction::Load ||
124 I->getOpcode() == Instruction::VAArg ||
125 I->getOpcode() == Instruction::ExtractValue ||
126 (I->getOpcode() >= CastOpsBegin && I->getOpcode() < CastOpsEnd);
128 static inline bool classof(const Value *V) {
129 return isa<Instruction>(V) && classof(cast<Instruction>(V));
134 struct OperandTraits<UnaryInstruction> : FixedNumOperandTraits<1> {
137 DEFINE_TRANSPARENT_OPERAND_ACCESSORS(UnaryInstruction, Value)
139 //===----------------------------------------------------------------------===//
140 // BinaryOperator Class
141 //===----------------------------------------------------------------------===//
143 class BinaryOperator : public Instruction {
144 void *operator new(size_t, unsigned); // Do not implement
146 void init(BinaryOps iType);
147 BinaryOperator(BinaryOps iType, Value *S1, Value *S2, const Type *Ty,
148 const Twine &Name, Instruction *InsertBefore);
149 BinaryOperator(BinaryOps iType, Value *S1, Value *S2, const Type *Ty,
150 const Twine &Name, BasicBlock *InsertAtEnd);
152 // allocate space for exactly two operands
153 void *operator new(size_t s) {
154 return User::operator new(s, 2);
157 /// Transparently provide more efficient getOperand methods.
158 DECLARE_TRANSPARENT_OPERAND_ACCESSORS(Value);
160 /// Create() - Construct a binary instruction, given the opcode and the two
161 /// operands. Optionally (if InstBefore is specified) insert the instruction
162 /// into a BasicBlock right before the specified instruction. The specified
163 /// Instruction is allowed to be a dereferenced end iterator.
165 static BinaryOperator *Create(BinaryOps Op, Value *S1, Value *S2,
166 const Twine &Name = "",
167 Instruction *InsertBefore = 0);
169 /// Create() - Construct a binary instruction, given the opcode and the two
170 /// operands. Also automatically insert this instruction to the end of the
171 /// BasicBlock specified.
173 static BinaryOperator *Create(BinaryOps Op, Value *S1, Value *S2,
174 const Twine &Name, BasicBlock *InsertAtEnd);
176 /// Create* - These methods just forward to Create, and are useful when you
177 /// statically know what type of instruction you're going to create. These
178 /// helpers just save some typing.
179 #define HANDLE_BINARY_INST(N, OPC, CLASS) \
180 static BinaryOperator *Create##OPC(Value *V1, Value *V2, \
181 const Twine &Name = "") {\
182 return Create(Instruction::OPC, V1, V2, Name);\
184 #include "llvm/Instruction.def"
185 #define HANDLE_BINARY_INST(N, OPC, CLASS) \
186 static BinaryOperator *Create##OPC(Value *V1, Value *V2, \
187 const Twine &Name, BasicBlock *BB) {\
188 return Create(Instruction::OPC, V1, V2, Name, BB);\
190 #include "llvm/Instruction.def"
191 #define HANDLE_BINARY_INST(N, OPC, CLASS) \
192 static BinaryOperator *Create##OPC(Value *V1, Value *V2, \
193 const Twine &Name, Instruction *I) {\
194 return Create(Instruction::OPC, V1, V2, Name, I);\
196 #include "llvm/Instruction.def"
199 /// CreateNSWAdd - Create an Add operator with the NSW flag set.
201 static BinaryOperator *CreateNSWAdd(Value *V1, Value *V2,
202 const Twine &Name = "") {
203 BinaryOperator *BO = CreateAdd(V1, V2, Name);
204 cast<AddOperator>(BO)->setHasNoSignedOverflow(true);
207 static BinaryOperator *CreateNSWAdd(Value *V1, Value *V2,
208 const Twine &Name, BasicBlock *BB) {
209 BinaryOperator *BO = CreateAdd(V1, V2, Name, BB);
210 cast<AddOperator>(BO)->setHasNoSignedOverflow(true);
213 static BinaryOperator *CreateNSWAdd(Value *V1, Value *V2,
214 const Twine &Name, Instruction *I) {
215 BinaryOperator *BO = CreateAdd(V1, V2, Name, I);
216 cast<AddOperator>(BO)->setHasNoSignedOverflow(true);
220 /// CreateExactSDiv - Create an SDiv operator with the exact flag set.
222 static BinaryOperator *CreateExactSDiv(Value *V1, Value *V2,
223 const Twine &Name = "") {
224 BinaryOperator *BO = CreateSDiv(V1, V2, Name);
225 cast<SDivOperator>(BO)->setIsExact(true);
228 static BinaryOperator *CreateExactSDiv(Value *V1, Value *V2,
229 const Twine &Name, BasicBlock *BB) {
230 BinaryOperator *BO = CreateSDiv(V1, V2, Name, BB);
231 cast<SDivOperator>(BO)->setIsExact(true);
234 static BinaryOperator *CreateExactSDiv(Value *V1, Value *V2,
235 const Twine &Name, Instruction *I) {
236 BinaryOperator *BO = CreateSDiv(V1, V2, Name, I);
237 cast<SDivOperator>(BO)->setIsExact(true);
241 /// Helper functions to construct and inspect unary operations (NEG and NOT)
242 /// via binary operators SUB and XOR:
244 /// CreateNeg, CreateNot - Create the NEG and NOT
245 /// instructions out of SUB and XOR instructions.
247 static BinaryOperator *CreateNeg(LLVMContext &Context,
248 Value *Op, const Twine &Name = "",
249 Instruction *InsertBefore = 0);
250 static BinaryOperator *CreateNeg(LLVMContext &Context,
251 Value *Op, const Twine &Name,
252 BasicBlock *InsertAtEnd);
253 static BinaryOperator *CreateFNeg(LLVMContext &Context,
254 Value *Op, const Twine &Name = "",
255 Instruction *InsertBefore = 0);
256 static BinaryOperator *CreateFNeg(LLVMContext &Context,
257 Value *Op, const Twine &Name,
258 BasicBlock *InsertAtEnd);
259 static BinaryOperator *CreateNot(LLVMContext &Context,
260 Value *Op, const Twine &Name = "",
261 Instruction *InsertBefore = 0);
262 static BinaryOperator *CreateNot(LLVMContext &Context,
263 Value *Op, const Twine &Name,
264 BasicBlock *InsertAtEnd);
266 /// isNeg, isFNeg, isNot - Check if the given Value is a
267 /// NEG, FNeg, or NOT instruction.
269 static bool isNeg(const Value *V);
270 static bool isFNeg(const Value *V);
271 static bool isNot(const Value *V);
273 /// getNegArgument, getNotArgument - Helper functions to extract the
274 /// unary argument of a NEG, FNEG or NOT operation implemented via
275 /// Sub, FSub, or Xor.
277 static const Value *getNegArgument(const Value *BinOp);
278 static Value *getNegArgument( Value *BinOp);
279 static const Value *getFNegArgument(const Value *BinOp);
280 static Value *getFNegArgument( Value *BinOp);
281 static const Value *getNotArgument(const Value *BinOp);
282 static Value *getNotArgument( Value *BinOp);
284 BinaryOps getOpcode() const {
285 return static_cast<BinaryOps>(Instruction::getOpcode());
288 virtual BinaryOperator *clone(LLVMContext &Context) const;
290 /// swapOperands - Exchange the two operands to this instruction.
291 /// This instruction is safe to use on any binary instruction and
292 /// does not modify the semantics of the instruction. If the instruction
293 /// cannot be reversed (ie, it's a Div), then return true.
297 // Methods for support type inquiry through isa, cast, and dyn_cast:
298 static inline bool classof(const BinaryOperator *) { return true; }
299 static inline bool classof(const Instruction *I) {
300 return I->isBinaryOp();
302 static inline bool classof(const Value *V) {
303 return isa<Instruction>(V) && classof(cast<Instruction>(V));
308 struct OperandTraits<BinaryOperator> : FixedNumOperandTraits<2> {
311 DEFINE_TRANSPARENT_OPERAND_ACCESSORS(BinaryOperator, Value)
313 //===----------------------------------------------------------------------===//
315 //===----------------------------------------------------------------------===//
317 /// CastInst - This is the base class for all instructions that perform data
318 /// casts. It is simply provided so that instruction category testing
319 /// can be performed with code like:
321 /// if (isa<CastInst>(Instr)) { ... }
322 /// @brief Base class of casting instructions.
323 class CastInst : public UnaryInstruction {
324 /// @brief Copy constructor
325 CastInst(const CastInst &CI)
326 : UnaryInstruction(CI.getType(), CI.getOpcode(), CI.getOperand(0)) {
328 /// @brief Do not allow default construction
331 /// @brief Constructor with insert-before-instruction semantics for subclasses
332 CastInst(const Type *Ty, unsigned iType, Value *S,
333 const Twine &NameStr = "", Instruction *InsertBefore = 0)
334 : UnaryInstruction(Ty, iType, S, InsertBefore) {
337 /// @brief Constructor with insert-at-end-of-block semantics for subclasses
338 CastInst(const Type *Ty, unsigned iType, Value *S,
339 const Twine &NameStr, BasicBlock *InsertAtEnd)
340 : UnaryInstruction(Ty, iType, S, InsertAtEnd) {
344 /// Provides a way to construct any of the CastInst subclasses using an
345 /// opcode instead of the subclass's constructor. The opcode must be in the
346 /// CastOps category (Instruction::isCast(opcode) returns true). This
347 /// constructor has insert-before-instruction semantics to automatically
348 /// insert the new CastInst before InsertBefore (if it is non-null).
349 /// @brief Construct any of the CastInst subclasses
350 static CastInst *Create(
351 Instruction::CastOps, ///< The opcode of the cast instruction
352 Value *S, ///< The value to be casted (operand 0)
353 const Type *Ty, ///< The type to which cast should be made
354 const Twine &Name = "", ///< Name for the instruction
355 Instruction *InsertBefore = 0 ///< Place to insert the instruction
357 /// Provides a way to construct any of the CastInst subclasses using an
358 /// opcode instead of the subclass's constructor. The opcode must be in the
359 /// CastOps category. This constructor has insert-at-end-of-block semantics
360 /// to automatically insert the new CastInst at the end of InsertAtEnd (if
362 /// @brief Construct any of the CastInst subclasses
363 static CastInst *Create(
364 Instruction::CastOps, ///< The opcode for the cast instruction
365 Value *S, ///< The value to be casted (operand 0)
366 const Type *Ty, ///< The type to which operand is casted
367 const Twine &Name, ///< The name for the instruction
368 BasicBlock *InsertAtEnd ///< The block to insert the instruction into
371 /// @brief Create a ZExt or BitCast cast instruction
372 static CastInst *CreateZExtOrBitCast(
373 Value *S, ///< The value to be casted (operand 0)
374 const Type *Ty, ///< The type to which cast should be made
375 const Twine &Name = "", ///< Name for the instruction
376 Instruction *InsertBefore = 0 ///< Place to insert the instruction
379 /// @brief Create a ZExt or BitCast cast instruction
380 static CastInst *CreateZExtOrBitCast(
381 Value *S, ///< The value to be casted (operand 0)
382 const Type *Ty, ///< The type to which operand is casted
383 const Twine &Name, ///< The name for the instruction
384 BasicBlock *InsertAtEnd ///< The block to insert the instruction into
387 /// @brief Create a SExt or BitCast cast instruction
388 static CastInst *CreateSExtOrBitCast(
389 Value *S, ///< The value to be casted (operand 0)
390 const Type *Ty, ///< The type to which cast should be made
391 const Twine &Name = "", ///< Name for the instruction
392 Instruction *InsertBefore = 0 ///< Place to insert the instruction
395 /// @brief Create a SExt or BitCast cast instruction
396 static CastInst *CreateSExtOrBitCast(
397 Value *S, ///< The value to be casted (operand 0)
398 const Type *Ty, ///< The type to which operand is casted
399 const Twine &Name, ///< The name for the instruction
400 BasicBlock *InsertAtEnd ///< The block to insert the instruction into
403 /// @brief Create a BitCast or a PtrToInt cast instruction
404 static CastInst *CreatePointerCast(
405 Value *S, ///< The pointer value to be casted (operand 0)
406 const Type *Ty, ///< The type to which operand is casted
407 const Twine &Name, ///< The name for the instruction
408 BasicBlock *InsertAtEnd ///< The block to insert the instruction into
411 /// @brief Create a BitCast or a PtrToInt cast instruction
412 static CastInst *CreatePointerCast(
413 Value *S, ///< The pointer value to be casted (operand 0)
414 const Type *Ty, ///< The type to which cast should be made
415 const Twine &Name = "", ///< Name for the instruction
416 Instruction *InsertBefore = 0 ///< Place to insert the instruction
419 /// @brief Create a ZExt, BitCast, or Trunc for int -> int casts.
420 static CastInst *CreateIntegerCast(
421 Value *S, ///< The pointer value to be casted (operand 0)
422 const Type *Ty, ///< The type to which cast should be made
423 bool isSigned, ///< Whether to regard S as signed or not
424 const Twine &Name = "", ///< Name for the instruction
425 Instruction *InsertBefore = 0 ///< Place to insert the instruction
428 /// @brief Create a ZExt, BitCast, or Trunc for int -> int casts.
429 static CastInst *CreateIntegerCast(
430 Value *S, ///< The integer value to be casted (operand 0)
431 const Type *Ty, ///< The integer type to which operand is casted
432 bool isSigned, ///< Whether to regard S as signed or not
433 const Twine &Name, ///< The name for the instruction
434 BasicBlock *InsertAtEnd ///< The block to insert the instruction into
437 /// @brief Create an FPExt, BitCast, or FPTrunc for fp -> fp casts
438 static CastInst *CreateFPCast(
439 Value *S, ///< The floating point value to be casted
440 const Type *Ty, ///< The floating point type to cast to
441 const Twine &Name = "", ///< Name for the instruction
442 Instruction *InsertBefore = 0 ///< Place to insert the instruction
445 /// @brief Create an FPExt, BitCast, or FPTrunc for fp -> fp casts
446 static CastInst *CreateFPCast(
447 Value *S, ///< The floating point value to be casted
448 const Type *Ty, ///< The floating point type to cast to
449 const Twine &Name, ///< The name for the instruction
450 BasicBlock *InsertAtEnd ///< The block to insert the instruction into
453 /// @brief Create a Trunc or BitCast cast instruction
454 static CastInst *CreateTruncOrBitCast(
455 Value *S, ///< The value to be casted (operand 0)
456 const Type *Ty, ///< The type to which cast should be made
457 const Twine &Name = "", ///< Name for the instruction
458 Instruction *InsertBefore = 0 ///< Place to insert the instruction
461 /// @brief Create a Trunc or BitCast cast instruction
462 static CastInst *CreateTruncOrBitCast(
463 Value *S, ///< The value to be casted (operand 0)
464 const Type *Ty, ///< The type to which operand is casted
465 const Twine &Name, ///< The name for the instruction
466 BasicBlock *InsertAtEnd ///< The block to insert the instruction into
469 /// @brief Check whether it is valid to call getCastOpcode for these types.
470 static bool isCastable(
471 const Type *SrcTy, ///< The Type from which the value should be cast.
472 const Type *DestTy ///< The Type to which the value should be cast.
475 /// Returns the opcode necessary to cast Val into Ty using usual casting
477 /// @brief Infer the opcode for cast operand and type
478 static Instruction::CastOps getCastOpcode(
479 const Value *Val, ///< The value to cast
480 bool SrcIsSigned, ///< Whether to treat the source as signed
481 const Type *Ty, ///< The Type to which the value should be casted
482 bool DstIsSigned ///< Whether to treate the dest. as signed
485 /// There are several places where we need to know if a cast instruction
486 /// only deals with integer source and destination types. To simplify that
487 /// logic, this method is provided.
488 /// @returns true iff the cast has only integral typed operand and dest type.
489 /// @brief Determine if this is an integer-only cast.
490 bool isIntegerCast() const;
492 /// A lossless cast is one that does not alter the basic value. It implies
493 /// a no-op cast but is more stringent, preventing things like int->float,
494 /// long->double, int->ptr, or vector->anything.
495 /// @returns true iff the cast is lossless.
496 /// @brief Determine if this is a lossless cast.
497 bool isLosslessCast() const;
499 /// A no-op cast is one that can be effected without changing any bits.
500 /// It implies that the source and destination types are the same size. The
501 /// IntPtrTy argument is used to make accurate determinations for casts
502 /// involving Integer and Pointer types. They are no-op casts if the integer
503 /// is the same size as the pointer. However, pointer size varies with
504 /// platform. Generally, the result of TargetData::getIntPtrType() should be
505 /// passed in. If that's not available, use Type::Int64Ty, which will make
506 /// the isNoopCast call conservative.
507 /// @brief Determine if this cast is a no-op cast.
509 const Type *IntPtrTy ///< Integer type corresponding to pointer
512 /// Determine how a pair of casts can be eliminated, if they can be at all.
513 /// This is a helper function for both CastInst and ConstantExpr.
514 /// @returns 0 if the CastInst pair can't be eliminated
515 /// @returns Instruction::CastOps value for a cast that can replace
516 /// the pair, casting SrcTy to DstTy.
517 /// @brief Determine if a cast pair is eliminable
518 static unsigned isEliminableCastPair(
519 Instruction::CastOps firstOpcode, ///< Opcode of first cast
520 Instruction::CastOps secondOpcode, ///< Opcode of second cast
521 const Type *SrcTy, ///< SrcTy of 1st cast
522 const Type *MidTy, ///< DstTy of 1st cast & SrcTy of 2nd cast
523 const Type *DstTy, ///< DstTy of 2nd cast
524 const Type *IntPtrTy ///< Integer type corresponding to Ptr types, or null
527 /// @brief Return the opcode of this CastInst
528 Instruction::CastOps getOpcode() const {
529 return Instruction::CastOps(Instruction::getOpcode());
532 /// @brief Return the source type, as a convenience
533 const Type* getSrcTy() const { return getOperand(0)->getType(); }
534 /// @brief Return the destination type, as a convenience
535 const Type* getDestTy() const { return getType(); }
537 /// This method can be used to determine if a cast from S to DstTy using
538 /// Opcode op is valid or not.
539 /// @returns true iff the proposed cast is valid.
540 /// @brief Determine if a cast is valid without creating one.
541 static bool castIsValid(Instruction::CastOps op, Value *S, const Type *DstTy);
543 /// @brief Methods for support type inquiry through isa, cast, and dyn_cast:
544 static inline bool classof(const CastInst *) { return true; }
545 static inline bool classof(const Instruction *I) {
548 static inline bool classof(const Value *V) {
549 return isa<Instruction>(V) && classof(cast<Instruction>(V));
553 //===----------------------------------------------------------------------===//
555 //===----------------------------------------------------------------------===//
557 /// This class is the base class for the comparison instructions.
558 /// @brief Abstract base class of comparison instructions.
559 // FIXME: why not derive from BinaryOperator?
560 class CmpInst: public Instruction {
561 void *operator new(size_t, unsigned); // DO NOT IMPLEMENT
562 CmpInst(); // do not implement
564 CmpInst(const Type *ty, Instruction::OtherOps op, unsigned short pred,
565 Value *LHS, Value *RHS, const Twine &Name = "",
566 Instruction *InsertBefore = 0);
568 CmpInst(const Type *ty, Instruction::OtherOps op, unsigned short pred,
569 Value *LHS, Value *RHS, const Twine &Name,
570 BasicBlock *InsertAtEnd);
573 /// This enumeration lists the possible predicates for CmpInst subclasses.
574 /// Values in the range 0-31 are reserved for FCmpInst, while values in the
575 /// range 32-64 are reserved for ICmpInst. This is necessary to ensure the
576 /// predicate values are not overlapping between the classes.
578 // Opcode U L G E Intuitive operation
579 FCMP_FALSE = 0, /// 0 0 0 0 Always false (always folded)
580 FCMP_OEQ = 1, /// 0 0 0 1 True if ordered and equal
581 FCMP_OGT = 2, /// 0 0 1 0 True if ordered and greater than
582 FCMP_OGE = 3, /// 0 0 1 1 True if ordered and greater than or equal
583 FCMP_OLT = 4, /// 0 1 0 0 True if ordered and less than
584 FCMP_OLE = 5, /// 0 1 0 1 True if ordered and less than or equal
585 FCMP_ONE = 6, /// 0 1 1 0 True if ordered and operands are unequal
586 FCMP_ORD = 7, /// 0 1 1 1 True if ordered (no nans)
587 FCMP_UNO = 8, /// 1 0 0 0 True if unordered: isnan(X) | isnan(Y)
588 FCMP_UEQ = 9, /// 1 0 0 1 True if unordered or equal
589 FCMP_UGT = 10, /// 1 0 1 0 True if unordered or greater than
590 FCMP_UGE = 11, /// 1 0 1 1 True if unordered, greater than, or equal
591 FCMP_ULT = 12, /// 1 1 0 0 True if unordered or less than
592 FCMP_ULE = 13, /// 1 1 0 1 True if unordered, less than, or equal
593 FCMP_UNE = 14, /// 1 1 1 0 True if unordered or not equal
594 FCMP_TRUE = 15, /// 1 1 1 1 Always true (always folded)
595 FIRST_FCMP_PREDICATE = FCMP_FALSE,
596 LAST_FCMP_PREDICATE = FCMP_TRUE,
597 BAD_FCMP_PREDICATE = FCMP_TRUE + 1,
598 ICMP_EQ = 32, /// equal
599 ICMP_NE = 33, /// not equal
600 ICMP_UGT = 34, /// unsigned greater than
601 ICMP_UGE = 35, /// unsigned greater or equal
602 ICMP_ULT = 36, /// unsigned less than
603 ICMP_ULE = 37, /// unsigned less or equal
604 ICMP_SGT = 38, /// signed greater than
605 ICMP_SGE = 39, /// signed greater or equal
606 ICMP_SLT = 40, /// signed less than
607 ICMP_SLE = 41, /// signed less or equal
608 FIRST_ICMP_PREDICATE = ICMP_EQ,
609 LAST_ICMP_PREDICATE = ICMP_SLE,
610 BAD_ICMP_PREDICATE = ICMP_SLE + 1
613 // allocate space for exactly two operands
614 void *operator new(size_t s) {
615 return User::operator new(s, 2);
617 /// Construct a compare instruction, given the opcode, the predicate and
618 /// the two operands. Optionally (if InstBefore is specified) insert the
619 /// instruction into a BasicBlock right before the specified instruction.
620 /// The specified Instruction is allowed to be a dereferenced end iterator.
621 /// @brief Create a CmpInst
622 static CmpInst *Create(LLVMContext &Context, OtherOps Op,
623 unsigned short predicate, Value *S1,
624 Value *S2, const Twine &Name = "",
625 Instruction *InsertBefore = 0);
627 /// Construct a compare instruction, given the opcode, the predicate and the
628 /// two operands. Also automatically insert this instruction to the end of
629 /// the BasicBlock specified.
630 /// @brief Create a CmpInst
631 static CmpInst *Create(OtherOps Op, unsigned short predicate, Value *S1,
632 Value *S2, const Twine &Name, BasicBlock *InsertAtEnd);
634 /// @brief Get the opcode casted to the right type
635 OtherOps getOpcode() const {
636 return static_cast<OtherOps>(Instruction::getOpcode());
639 /// @brief Return the predicate for this instruction.
640 Predicate getPredicate() const { return Predicate(SubclassData); }
642 /// @brief Set the predicate for this instruction to the specified value.
643 void setPredicate(Predicate P) { SubclassData = P; }
645 /// For example, EQ -> NE, UGT -> ULE, SLT -> SGE,
646 /// OEQ -> UNE, UGT -> OLE, OLT -> UGE, etc.
647 /// @returns the inverse predicate for the instruction's current predicate.
648 /// @brief Return the inverse of the instruction's predicate.
649 Predicate getInversePredicate() const {
650 return getInversePredicate(getPredicate());
653 /// For example, EQ -> NE, UGT -> ULE, SLT -> SGE,
654 /// OEQ -> UNE, UGT -> OLE, OLT -> UGE, etc.
655 /// @returns the inverse predicate for predicate provided in \p pred.
656 /// @brief Return the inverse of a given predicate
657 static Predicate getInversePredicate(Predicate pred);
659 /// For example, EQ->EQ, SLE->SGE, ULT->UGT,
660 /// OEQ->OEQ, ULE->UGE, OLT->OGT, etc.
661 /// @returns the predicate that would be the result of exchanging the two
662 /// operands of the CmpInst instruction without changing the result
664 /// @brief Return the predicate as if the operands were swapped
665 Predicate getSwappedPredicate() const {
666 return getSwappedPredicate(getPredicate());
669 /// This is a static version that you can use without an instruction
671 /// @brief Return the predicate as if the operands were swapped.
672 static Predicate getSwappedPredicate(Predicate pred);
674 /// @brief Provide more efficient getOperand methods.
675 DECLARE_TRANSPARENT_OPERAND_ACCESSORS(Value);
677 /// This is just a convenience that dispatches to the subclasses.
678 /// @brief Swap the operands and adjust predicate accordingly to retain
679 /// the same comparison.
682 /// This is just a convenience that dispatches to the subclasses.
683 /// @brief Determine if this CmpInst is commutative.
684 bool isCommutative();
686 /// This is just a convenience that dispatches to the subclasses.
687 /// @brief Determine if this is an equals/not equals predicate.
690 /// @returns true if the predicate is unsigned, false otherwise.
691 /// @brief Determine if the predicate is an unsigned operation.
692 static bool isUnsigned(unsigned short predicate);
694 /// @returns true if the predicate is signed, false otherwise.
695 /// @brief Determine if the predicate is an signed operation.
696 static bool isSigned(unsigned short predicate);
698 /// @brief Determine if the predicate is an ordered operation.
699 static bool isOrdered(unsigned short predicate);
701 /// @brief Determine if the predicate is an unordered operation.
702 static bool isUnordered(unsigned short predicate);
704 /// @brief Methods for support type inquiry through isa, cast, and dyn_cast:
705 static inline bool classof(const CmpInst *) { return true; }
706 static inline bool classof(const Instruction *I) {
707 return I->getOpcode() == Instruction::ICmp ||
708 I->getOpcode() == Instruction::FCmp;
710 static inline bool classof(const Value *V) {
711 return isa<Instruction>(V) && classof(cast<Instruction>(V));
714 /// @brief Create a result type for fcmp/icmp
715 static const Type* makeCmpResultType(const Type* opnd_type) {
716 if (const VectorType* vt = dyn_cast<const VectorType>(opnd_type)) {
717 return VectorType::get(Type::Int1Ty, vt->getNumElements());
724 // FIXME: these are redundant if CmpInst < BinaryOperator
726 struct OperandTraits<CmpInst> : FixedNumOperandTraits<2> {
729 DEFINE_TRANSPARENT_OPERAND_ACCESSORS(CmpInst, Value)
731 } // End llvm namespace