1 //===-- llvm/Instructions.h - Instruction subclass definitions --*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file was developed by the LLVM research group and is distributed under
6 // the University of Illinois Open Source 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
19 #include "llvm/Instruction.h"
20 #include "llvm/InstrTypes.h"
29 //===----------------------------------------------------------------------===//
30 // AllocationInst Class
31 //===----------------------------------------------------------------------===//
33 /// AllocationInst - This class is the common base class of MallocInst and
36 class AllocationInst : public UnaryInstruction {
39 AllocationInst(const Type *Ty, Value *ArraySize, unsigned iTy, unsigned Align,
40 const std::string &Name = "", Instruction *InsertBefore = 0);
41 AllocationInst(const Type *Ty, Value *ArraySize, unsigned iTy, unsigned Align,
42 const std::string &Name, BasicBlock *InsertAtEnd);
44 // Out of line virtual method, so the vtable, etc has a home.
45 virtual ~AllocationInst();
47 /// isArrayAllocation - Return true if there is an allocation size parameter
48 /// to the allocation instruction that is not 1.
50 bool isArrayAllocation() const;
52 /// getArraySize - Get the number of element allocated, for a simple
53 /// allocation of a single element, this will return a constant 1 value.
55 inline const Value *getArraySize() const { return getOperand(0); }
56 inline Value *getArraySize() { return getOperand(0); }
58 /// getType - Overload to return most specific pointer type
60 inline const PointerType *getType() const {
61 return reinterpret_cast<const PointerType*>(Instruction::getType());
64 /// getAllocatedType - Return the type that is being allocated by the
67 const Type *getAllocatedType() const;
69 /// getAlignment - Return the alignment of the memory that is being allocated
70 /// by the instruction.
72 unsigned getAlignment() const { return Alignment; }
73 void setAlignment(unsigned Align) {
74 assert((Align & (Align-1)) == 0 && "Alignment is not a power of 2!");
78 virtual Instruction *clone() const = 0;
80 // Methods for support type inquiry through isa, cast, and dyn_cast:
81 static inline bool classof(const AllocationInst *) { return true; }
82 static inline bool classof(const Instruction *I) {
83 return I->getOpcode() == Instruction::Alloca ||
84 I->getOpcode() == Instruction::Malloc;
86 static inline bool classof(const Value *V) {
87 return isa<Instruction>(V) && classof(cast<Instruction>(V));
92 //===----------------------------------------------------------------------===//
94 //===----------------------------------------------------------------------===//
96 /// MallocInst - an instruction to allocated memory on the heap
98 class MallocInst : public AllocationInst {
99 MallocInst(const MallocInst &MI);
101 explicit MallocInst(const Type *Ty, Value *ArraySize = 0,
102 const std::string &Name = "",
103 Instruction *InsertBefore = 0)
104 : AllocationInst(Ty, ArraySize, Malloc, 0, Name, InsertBefore) {}
105 MallocInst(const Type *Ty, Value *ArraySize, const std::string &Name,
106 BasicBlock *InsertAtEnd)
107 : AllocationInst(Ty, ArraySize, Malloc, 0, Name, InsertAtEnd) {}
109 explicit MallocInst(const Type *Ty, const std::string &Name,
110 Instruction *InsertBefore = 0)
111 : AllocationInst(Ty, 0, Malloc, 0, Name, InsertBefore) {}
112 MallocInst(const Type *Ty, const std::string &Name, BasicBlock *InsertAtEnd)
113 : AllocationInst(Ty, 0, Malloc, 0, Name, InsertAtEnd) {}
115 MallocInst(const Type *Ty, Value *ArraySize, unsigned Align,
116 const std::string &Name, BasicBlock *InsertAtEnd)
117 : AllocationInst(Ty, ArraySize, Malloc, Align, Name, InsertAtEnd) {}
118 MallocInst(const Type *Ty, Value *ArraySize, unsigned Align,
119 const std::string &Name = "",
120 Instruction *InsertBefore = 0)
121 : AllocationInst(Ty, ArraySize, Malloc, Align, Name, InsertBefore) {}
123 virtual MallocInst *clone() const;
125 // Methods for support type inquiry through isa, cast, and dyn_cast:
126 static inline bool classof(const MallocInst *) { return true; }
127 static inline bool classof(const Instruction *I) {
128 return (I->getOpcode() == Instruction::Malloc);
130 static inline bool classof(const Value *V) {
131 return isa<Instruction>(V) && classof(cast<Instruction>(V));
136 //===----------------------------------------------------------------------===//
138 //===----------------------------------------------------------------------===//
140 /// AllocaInst - an instruction to allocate memory on the stack
142 class AllocaInst : public AllocationInst {
143 AllocaInst(const AllocaInst &);
145 explicit AllocaInst(const Type *Ty, Value *ArraySize = 0,
146 const std::string &Name = "",
147 Instruction *InsertBefore = 0)
148 : AllocationInst(Ty, ArraySize, Alloca, 0, Name, InsertBefore) {}
149 AllocaInst(const Type *Ty, Value *ArraySize, const std::string &Name,
150 BasicBlock *InsertAtEnd)
151 : AllocationInst(Ty, ArraySize, Alloca, 0, Name, InsertAtEnd) {}
153 AllocaInst(const Type *Ty, const std::string &Name,
154 Instruction *InsertBefore = 0)
155 : AllocationInst(Ty, 0, Alloca, 0, Name, InsertBefore) {}
156 AllocaInst(const Type *Ty, const std::string &Name, BasicBlock *InsertAtEnd)
157 : AllocationInst(Ty, 0, Alloca, 0, Name, InsertAtEnd) {}
159 AllocaInst(const Type *Ty, Value *ArraySize, unsigned Align,
160 const std::string &Name = "", Instruction *InsertBefore = 0)
161 : AllocationInst(Ty, ArraySize, Alloca, Align, Name, InsertBefore) {}
162 AllocaInst(const Type *Ty, Value *ArraySize, unsigned Align,
163 const std::string &Name, BasicBlock *InsertAtEnd)
164 : AllocationInst(Ty, ArraySize, Alloca, Align, Name, InsertAtEnd) {}
166 virtual AllocaInst *clone() const;
168 // Methods for support type inquiry through isa, cast, and dyn_cast:
169 static inline bool classof(const AllocaInst *) { return true; }
170 static inline bool classof(const Instruction *I) {
171 return (I->getOpcode() == Instruction::Alloca);
173 static inline bool classof(const Value *V) {
174 return isa<Instruction>(V) && classof(cast<Instruction>(V));
179 //===----------------------------------------------------------------------===//
181 //===----------------------------------------------------------------------===//
183 /// FreeInst - an instruction to deallocate memory
185 class FreeInst : public UnaryInstruction {
188 explicit FreeInst(Value *Ptr, Instruction *InsertBefore = 0);
189 FreeInst(Value *Ptr, BasicBlock *InsertAfter);
191 virtual FreeInst *clone() const;
193 virtual bool mayWriteToMemory() const { return true; }
195 // Methods for support type inquiry through isa, cast, and dyn_cast:
196 static inline bool classof(const FreeInst *) { return true; }
197 static inline bool classof(const Instruction *I) {
198 return (I->getOpcode() == Instruction::Free);
200 static inline bool classof(const Value *V) {
201 return isa<Instruction>(V) && classof(cast<Instruction>(V));
206 //===----------------------------------------------------------------------===//
208 //===----------------------------------------------------------------------===//
210 /// LoadInst - an instruction for reading from memory. This uses the
211 /// SubclassData field in Value to store whether or not the load is volatile.
213 class LoadInst : public UnaryInstruction {
214 LoadInst(const LoadInst &LI)
215 : UnaryInstruction(LI.getType(), Load, LI.getOperand(0)) {
216 setVolatile(LI.isVolatile());
224 LoadInst(Value *Ptr, const std::string &Name, Instruction *InsertBefore);
225 LoadInst(Value *Ptr, const std::string &Name, BasicBlock *InsertAtEnd);
226 LoadInst(Value *Ptr, const std::string &Name = "", bool isVolatile = false,
227 Instruction *InsertBefore = 0);
228 LoadInst(Value *Ptr, const std::string &Name, bool isVolatile,
229 BasicBlock *InsertAtEnd);
231 /// isVolatile - Return true if this is a load from a volatile memory
234 bool isVolatile() const { return SubclassData; }
236 /// setVolatile - Specify whether this is a volatile load or not.
238 void setVolatile(bool V) { SubclassData = V; }
240 virtual LoadInst *clone() const;
242 virtual bool mayWriteToMemory() const { return isVolatile(); }
244 Value *getPointerOperand() { return getOperand(0); }
245 const Value *getPointerOperand() const { return getOperand(0); }
246 static unsigned getPointerOperandIndex() { return 0U; }
248 // Methods for support type inquiry through isa, cast, and dyn_cast:
249 static inline bool classof(const LoadInst *) { return true; }
250 static inline bool classof(const Instruction *I) {
251 return I->getOpcode() == Instruction::Load;
253 static inline bool classof(const Value *V) {
254 return isa<Instruction>(V) && classof(cast<Instruction>(V));
259 //===----------------------------------------------------------------------===//
261 //===----------------------------------------------------------------------===//
263 /// StoreInst - an instruction for storing to memory
265 class StoreInst : public Instruction {
267 StoreInst(const StoreInst &SI) : Instruction(SI.getType(), Store, Ops, 2) {
268 Ops[0].init(SI.Ops[0], this);
269 Ops[1].init(SI.Ops[1], this);
270 setVolatile(SI.isVolatile());
277 StoreInst(Value *Val, Value *Ptr, Instruction *InsertBefore);
278 StoreInst(Value *Val, Value *Ptr, BasicBlock *InsertAtEnd);
279 StoreInst(Value *Val, Value *Ptr, bool isVolatile = false,
280 Instruction *InsertBefore = 0);
281 StoreInst(Value *Val, Value *Ptr, bool isVolatile, BasicBlock *InsertAtEnd);
284 /// isVolatile - Return true if this is a load from a volatile memory
287 bool isVolatile() const { return SubclassData; }
289 /// setVolatile - Specify whether this is a volatile load or not.
291 void setVolatile(bool V) { SubclassData = V; }
293 /// Transparently provide more efficient getOperand methods.
294 Value *getOperand(unsigned i) const {
295 assert(i < 2 && "getOperand() out of range!");
298 void setOperand(unsigned i, Value *Val) {
299 assert(i < 2 && "setOperand() out of range!");
302 unsigned getNumOperands() const { return 2; }
305 virtual StoreInst *clone() const;
307 virtual bool mayWriteToMemory() const { return true; }
309 Value *getPointerOperand() { return getOperand(1); }
310 const Value *getPointerOperand() const { return getOperand(1); }
311 static unsigned getPointerOperandIndex() { return 1U; }
313 // Methods for support type inquiry through isa, cast, and dyn_cast:
314 static inline bool classof(const StoreInst *) { return true; }
315 static inline bool classof(const Instruction *I) {
316 return I->getOpcode() == Instruction::Store;
318 static inline bool classof(const Value *V) {
319 return isa<Instruction>(V) && classof(cast<Instruction>(V));
324 //===----------------------------------------------------------------------===//
325 // GetElementPtrInst Class
326 //===----------------------------------------------------------------------===//
328 /// GetElementPtrInst - an instruction for type-safe pointer arithmetic to
329 /// access elements of arrays and structs
331 class GetElementPtrInst : public Instruction {
332 GetElementPtrInst(const GetElementPtrInst &GEPI)
333 : Instruction(reinterpret_cast<const Type*>(GEPI.getType()), GetElementPtr,
334 0, GEPI.getNumOperands()) {
335 Use *OL = OperandList = new Use[NumOperands];
336 Use *GEPIOL = GEPI.OperandList;
337 for (unsigned i = 0, E = NumOperands; i != E; ++i)
338 OL[i].init(GEPIOL[i], this);
340 void init(Value *Ptr, const std::vector<Value*> &Idx);
341 void init(Value *Ptr, Value *Idx0, Value *Idx1);
342 void init(Value *Ptr, Value *Idx);
344 /// Constructors - Create a getelementptr instruction with a base pointer an
345 /// list of indices. The first ctor can optionally insert before an existing
346 /// instruction, the second appends the new instruction to the specified
348 GetElementPtrInst(Value *Ptr, const std::vector<Value*> &Idx,
349 const std::string &Name = "", Instruction *InsertBefore =0);
350 GetElementPtrInst(Value *Ptr, const std::vector<Value*> &Idx,
351 const std::string &Name, BasicBlock *InsertAtEnd);
353 /// Constructors - These two constructors are convenience methods because one
354 /// and two index getelementptr instructions are so common.
355 GetElementPtrInst(Value *Ptr, Value *Idx,
356 const std::string &Name = "", Instruction *InsertBefore =0);
357 GetElementPtrInst(Value *Ptr, Value *Idx,
358 const std::string &Name, BasicBlock *InsertAtEnd);
359 GetElementPtrInst(Value *Ptr, Value *Idx0, Value *Idx1,
360 const std::string &Name = "", Instruction *InsertBefore =0);
361 GetElementPtrInst(Value *Ptr, Value *Idx0, Value *Idx1,
362 const std::string &Name, BasicBlock *InsertAtEnd);
363 ~GetElementPtrInst();
365 virtual GetElementPtrInst *clone() const;
367 // getType - Overload to return most specific pointer type...
368 inline const PointerType *getType() const {
369 return reinterpret_cast<const PointerType*>(Instruction::getType());
372 /// getIndexedType - Returns the type of the element that would be loaded with
373 /// a load instruction with the specified parameters.
375 /// A null type is returned if the indices are invalid for the specified
378 static const Type *getIndexedType(const Type *Ptr,
379 const std::vector<Value*> &Indices,
380 bool AllowStructLeaf = false);
381 static const Type *getIndexedType(const Type *Ptr, Value *Idx0, Value *Idx1,
382 bool AllowStructLeaf = false);
383 static const Type *getIndexedType(const Type *Ptr, Value *Idx);
385 inline op_iterator idx_begin() { return op_begin()+1; }
386 inline const_op_iterator idx_begin() const { return op_begin()+1; }
387 inline op_iterator idx_end() { return op_end(); }
388 inline const_op_iterator idx_end() const { return op_end(); }
390 Value *getPointerOperand() {
391 return getOperand(0);
393 const Value *getPointerOperand() const {
394 return getOperand(0);
396 static unsigned getPointerOperandIndex() {
397 return 0U; // get index for modifying correct operand
400 inline unsigned getNumIndices() const { // Note: always non-negative
401 return getNumOperands() - 1;
404 inline bool hasIndices() const {
405 return getNumOperands() > 1;
408 // Methods for support type inquiry through isa, cast, and dyn_cast:
409 static inline bool classof(const GetElementPtrInst *) { return true; }
410 static inline bool classof(const Instruction *I) {
411 return (I->getOpcode() == Instruction::GetElementPtr);
413 static inline bool classof(const Value *V) {
414 return isa<Instruction>(V) && classof(cast<Instruction>(V));
418 //===----------------------------------------------------------------------===//
420 //===----------------------------------------------------------------------===//
422 /// SetCondInst class - Represent a setCC operator, where CC is eq, ne, lt, gt,
425 class SetCondInst : public BinaryOperator {
427 SetCondInst(BinaryOps Opcode, Value *LHS, Value *RHS,
428 const std::string &Name = "", Instruction *InsertBefore = 0);
429 SetCondInst(BinaryOps Opcode, Value *LHS, Value *RHS,
430 const std::string &Name, BasicBlock *InsertAtEnd);
432 /// getInverseCondition - Return the inverse of the current condition opcode.
433 /// For example seteq -> setne, setgt -> setle, setlt -> setge, etc...
435 BinaryOps getInverseCondition() const {
436 return getInverseCondition(getOpcode());
439 /// getInverseCondition - Static version that you can use without an
440 /// instruction available.
442 static BinaryOps getInverseCondition(BinaryOps Opcode);
444 /// getSwappedCondition - Return the condition opcode that would be the result
445 /// of exchanging the two operands of the setcc instruction without changing
446 /// the result produced. Thus, seteq->seteq, setle->setge, setlt->setgt, etc.
448 BinaryOps getSwappedCondition() const {
449 return getSwappedCondition(getOpcode());
452 /// getSwappedCondition - Static version that you can use without an
453 /// instruction available.
455 static BinaryOps getSwappedCondition(BinaryOps Opcode);
457 /// isEquality - Return true if this comparison is an ==/!= comparison.
459 bool isEquality() const {
460 return getOpcode() == SetEQ || getOpcode() == SetNE;
463 /// isRelational - Return true if this comparison is a </>/<=/>= comparison.
465 bool isRelational() const {
466 return !isEquality();
469 // Methods for support type inquiry through isa, cast, and dyn_cast:
470 static inline bool classof(const SetCondInst *) { return true; }
471 static inline bool classof(const Instruction *I) {
472 return I->getOpcode() == SetEQ || I->getOpcode() == SetNE ||
473 I->getOpcode() == SetLE || I->getOpcode() == SetGE ||
474 I->getOpcode() == SetLT || I->getOpcode() == SetGT;
476 static inline bool classof(const Value *V) {
477 return isa<Instruction>(V) && classof(cast<Instruction>(V));
481 //===----------------------------------------------------------------------===//
483 //===----------------------------------------------------------------------===//
485 /// CastInst - This class represents a cast from Operand[0] to the type of
486 /// the instruction (i->getType()).
488 class CastInst : public UnaryInstruction {
489 CastInst(const CastInst &CI)
490 : UnaryInstruction(CI.getType(), Cast, CI.getOperand(0)) {
493 CastInst(Value *S, const Type *Ty, const std::string &Name = "",
494 Instruction *InsertBefore = 0)
495 : UnaryInstruction(Ty, Cast, S, Name, InsertBefore) {
497 CastInst(Value *S, const Type *Ty, const std::string &Name,
498 BasicBlock *InsertAtEnd)
499 : UnaryInstruction(Ty, Cast, S, Name, InsertAtEnd) {
502 virtual CastInst *clone() const;
504 // Methods for support type inquiry through isa, cast, and dyn_cast:
505 static inline bool classof(const CastInst *) { return true; }
506 static inline bool classof(const Instruction *I) {
507 return I->getOpcode() == Cast;
509 static inline bool classof(const Value *V) {
510 return isa<Instruction>(V) && classof(cast<Instruction>(V));
515 //===----------------------------------------------------------------------===//
517 //===----------------------------------------------------------------------===//
519 /// CallInst - This class represents a function call, abstracting a target
520 /// machine's calling convention. This class uses low bit of the SubClassData
521 /// field to indicate whether or not this is a tail call. The rest of the bits
522 /// hold the calling convention of the call.
524 class CallInst : public Instruction {
525 CallInst(const CallInst &CI);
526 void init(Value *Func, const std::vector<Value*> &Params);
527 void init(Value *Func, Value *Actual1, Value *Actual2);
528 void init(Value *Func, Value *Actual);
529 void init(Value *Func);
532 CallInst(Value *F, const std::vector<Value*> &Par,
533 const std::string &Name = "", Instruction *InsertBefore = 0);
534 CallInst(Value *F, const std::vector<Value*> &Par,
535 const std::string &Name, BasicBlock *InsertAtEnd);
537 // Alternate CallInst ctors w/ two actuals, w/ one actual and no
538 // actuals, respectively.
539 CallInst(Value *F, Value *Actual1, Value *Actual2,
540 const std::string& Name = "", Instruction *InsertBefore = 0);
541 CallInst(Value *F, Value *Actual1, Value *Actual2,
542 const std::string& Name, BasicBlock *InsertAtEnd);
543 CallInst(Value *F, Value *Actual, const std::string& Name = "",
544 Instruction *InsertBefore = 0);
545 CallInst(Value *F, Value *Actual, const std::string& Name,
546 BasicBlock *InsertAtEnd);
547 explicit CallInst(Value *F, const std::string &Name = "",
548 Instruction *InsertBefore = 0);
549 explicit CallInst(Value *F, const std::string &Name,
550 BasicBlock *InsertAtEnd);
553 virtual CallInst *clone() const;
554 bool mayWriteToMemory() const { return true; }
556 bool isTailCall() const { return SubclassData & 1; }
557 void setTailCall(bool isTailCall = true) {
558 SubclassData = (SubclassData & ~1) | unsigned(isTailCall);
561 /// getCallingConv/setCallingConv - Get or set the calling convention of this
563 unsigned getCallingConv() const { return SubclassData >> 1; }
564 void setCallingConv(unsigned CC) {
565 SubclassData = (SubclassData & 1) | (CC << 1);
568 /// getCalledFunction - Return the function being called by this instruction
569 /// if it is a direct call. If it is a call through a function pointer,
571 Function *getCalledFunction() const {
572 return static_cast<Function*>(dyn_cast<Function>(getOperand(0)));
575 // getCalledValue - Get a pointer to a method that is invoked by this inst.
576 inline const Value *getCalledValue() const { return getOperand(0); }
577 inline Value *getCalledValue() { return getOperand(0); }
579 // Methods for support type inquiry through isa, cast, and dyn_cast:
580 static inline bool classof(const CallInst *) { return true; }
581 static inline bool classof(const Instruction *I) {
582 return I->getOpcode() == Instruction::Call;
584 static inline bool classof(const Value *V) {
585 return isa<Instruction>(V) && classof(cast<Instruction>(V));
590 //===----------------------------------------------------------------------===//
592 //===----------------------------------------------------------------------===//
594 /// ShiftInst - This class represents left and right shift instructions.
596 class ShiftInst : public Instruction {
598 ShiftInst(const ShiftInst &SI)
599 : Instruction(SI.getType(), SI.getOpcode(), Ops, 2) {
600 Ops[0].init(SI.Ops[0], this);
601 Ops[1].init(SI.Ops[1], this);
603 void init(OtherOps Opcode, Value *S, Value *SA) {
604 assert((Opcode == Shl || Opcode == Shr) && "ShiftInst Opcode invalid!");
605 Ops[0].init(S, this);
606 Ops[1].init(SA, this);
610 ShiftInst(OtherOps Opcode, Value *S, Value *SA, const std::string &Name = "",
611 Instruction *InsertBefore = 0)
612 : Instruction(S->getType(), Opcode, Ops, 2, Name, InsertBefore) {
615 ShiftInst(OtherOps Opcode, Value *S, Value *SA, const std::string &Name,
616 BasicBlock *InsertAtEnd)
617 : Instruction(S->getType(), Opcode, Ops, 2, Name, InsertAtEnd) {
621 OtherOps getOpcode() const {
622 return static_cast<OtherOps>(Instruction::getOpcode());
625 /// Transparently provide more efficient getOperand methods.
626 Value *getOperand(unsigned i) const {
627 assert(i < 2 && "getOperand() out of range!");
630 void setOperand(unsigned i, Value *Val) {
631 assert(i < 2 && "setOperand() out of range!");
634 unsigned getNumOperands() const { return 2; }
636 virtual ShiftInst *clone() const;
638 // Methods for support type inquiry through isa, cast, and dyn_cast:
639 static inline bool classof(const ShiftInst *) { return true; }
640 static inline bool classof(const Instruction *I) {
641 return (I->getOpcode() == Instruction::Shr) |
642 (I->getOpcode() == Instruction::Shl);
644 static inline bool classof(const Value *V) {
645 return isa<Instruction>(V) && classof(cast<Instruction>(V));
649 //===----------------------------------------------------------------------===//
651 //===----------------------------------------------------------------------===//
653 /// SelectInst - This class represents the LLVM 'select' instruction.
655 class SelectInst : public Instruction {
658 void init(Value *C, Value *S1, Value *S2) {
659 Ops[0].init(C, this);
660 Ops[1].init(S1, this);
661 Ops[2].init(S2, this);
664 SelectInst(const SelectInst &SI)
665 : Instruction(SI.getType(), SI.getOpcode(), Ops, 3) {
666 init(SI.Ops[0], SI.Ops[1], SI.Ops[2]);
669 SelectInst(Value *C, Value *S1, Value *S2, const std::string &Name = "",
670 Instruction *InsertBefore = 0)
671 : Instruction(S1->getType(), Instruction::Select, Ops, 3,
672 Name, InsertBefore) {
675 SelectInst(Value *C, Value *S1, Value *S2, const std::string &Name,
676 BasicBlock *InsertAtEnd)
677 : Instruction(S1->getType(), Instruction::Select, Ops, 3,
682 Value *getCondition() const { return Ops[0]; }
683 Value *getTrueValue() const { return Ops[1]; }
684 Value *getFalseValue() const { return Ops[2]; }
686 /// Transparently provide more efficient getOperand methods.
687 Value *getOperand(unsigned i) const {
688 assert(i < 3 && "getOperand() out of range!");
691 void setOperand(unsigned i, Value *Val) {
692 assert(i < 3 && "setOperand() out of range!");
695 unsigned getNumOperands() const { return 3; }
697 OtherOps getOpcode() const {
698 return static_cast<OtherOps>(Instruction::getOpcode());
701 virtual SelectInst *clone() const;
703 // Methods for support type inquiry through isa, cast, and dyn_cast:
704 static inline bool classof(const SelectInst *) { return true; }
705 static inline bool classof(const Instruction *I) {
706 return I->getOpcode() == Instruction::Select;
708 static inline bool classof(const Value *V) {
709 return isa<Instruction>(V) && classof(cast<Instruction>(V));
713 //===----------------------------------------------------------------------===//
715 //===----------------------------------------------------------------------===//
717 /// VAArgInst - This class represents the va_arg llvm instruction, which returns
718 /// an argument of the specified type given a va_list and increments that list
720 class VAArgInst : public UnaryInstruction {
721 VAArgInst(const VAArgInst &VAA)
722 : UnaryInstruction(VAA.getType(), VAArg, VAA.getOperand(0)) {}
724 VAArgInst(Value *List, const Type *Ty, const std::string &Name = "",
725 Instruction *InsertBefore = 0)
726 : UnaryInstruction(Ty, VAArg, List, Name, InsertBefore) {
728 VAArgInst(Value *List, const Type *Ty, const std::string &Name,
729 BasicBlock *InsertAtEnd)
730 : UnaryInstruction(Ty, VAArg, List, Name, InsertAtEnd) {
733 virtual VAArgInst *clone() const;
734 bool mayWriteToMemory() const { return true; }
736 // Methods for support type inquiry through isa, cast, and dyn_cast:
737 static inline bool classof(const VAArgInst *) { return true; }
738 static inline bool classof(const Instruction *I) {
739 return I->getOpcode() == VAArg;
741 static inline bool classof(const Value *V) {
742 return isa<Instruction>(V) && classof(cast<Instruction>(V));
746 //===----------------------------------------------------------------------===//
747 // ExtractElementInst Class
748 //===----------------------------------------------------------------------===//
750 /// ExtractElementInst - This instruction extracts a single (scalar)
751 /// element from a PackedType value
753 class ExtractElementInst : public Instruction {
755 ExtractElementInst(const ExtractElementInst &EE) :
756 Instruction(EE.getType(), ExtractElement, Ops, 2) {
757 Ops[0].init(EE.Ops[0], this);
758 Ops[1].init(EE.Ops[1], this);
762 ExtractElementInst(Value *Vec, Value *Idx, const std::string &Name = "",
763 Instruction *InsertBefore = 0);
764 ExtractElementInst(Value *Vec, Value *Idx, const std::string &Name,
765 BasicBlock *InsertAtEnd);
767 /// isValidOperands - Return true if an extractelement instruction can be
768 /// formed with the specified operands.
769 static bool isValidOperands(const Value *Vec, const Value *Idx);
771 virtual ExtractElementInst *clone() const;
773 virtual bool mayWriteToMemory() const { return false; }
775 /// Transparently provide more efficient getOperand methods.
776 Value *getOperand(unsigned i) const {
777 assert(i < 2 && "getOperand() out of range!");
780 void setOperand(unsigned i, Value *Val) {
781 assert(i < 2 && "setOperand() out of range!");
784 unsigned getNumOperands() const { return 2; }
786 // Methods for support type inquiry through isa, cast, and dyn_cast:
787 static inline bool classof(const ExtractElementInst *) { return true; }
788 static inline bool classof(const Instruction *I) {
789 return I->getOpcode() == Instruction::ExtractElement;
791 static inline bool classof(const Value *V) {
792 return isa<Instruction>(V) && classof(cast<Instruction>(V));
796 //===----------------------------------------------------------------------===//
797 // InsertElementInst Class
798 //===----------------------------------------------------------------------===//
800 /// InsertElementInst - This instruction inserts a single (scalar)
801 /// element into a PackedType value
803 class InsertElementInst : public Instruction {
805 InsertElementInst(const InsertElementInst &IE);
807 InsertElementInst(Value *Vec, Value *NewElt, Value *Idx,
808 const std::string &Name = "",Instruction *InsertBefore = 0);
809 InsertElementInst(Value *Vec, Value *NewElt, Value *Idx,
810 const std::string &Name, BasicBlock *InsertAtEnd);
812 /// isValidOperands - Return true if an insertelement instruction can be
813 /// formed with the specified operands.
814 static bool isValidOperands(const Value *Vec, const Value *NewElt,
817 virtual InsertElementInst *clone() const;
819 virtual bool mayWriteToMemory() const { return false; }
821 /// getType - Overload to return most specific packed type.
823 inline const PackedType *getType() const {
824 return reinterpret_cast<const PackedType*>(Instruction::getType());
827 /// Transparently provide more efficient getOperand methods.
828 Value *getOperand(unsigned i) const {
829 assert(i < 3 && "getOperand() out of range!");
832 void setOperand(unsigned i, Value *Val) {
833 assert(i < 3 && "setOperand() out of range!");
836 unsigned getNumOperands() const { return 3; }
838 // Methods for support type inquiry through isa, cast, and dyn_cast:
839 static inline bool classof(const InsertElementInst *) { return true; }
840 static inline bool classof(const Instruction *I) {
841 return I->getOpcode() == Instruction::InsertElement;
843 static inline bool classof(const Value *V) {
844 return isa<Instruction>(V) && classof(cast<Instruction>(V));
848 //===----------------------------------------------------------------------===//
849 // ShuffleVectorInst Class
850 //===----------------------------------------------------------------------===//
852 /// ShuffleVectorInst - This instruction constructs a fixed permutation of two
855 class ShuffleVectorInst : public Instruction {
857 ShuffleVectorInst(const ShuffleVectorInst &IE);
859 ShuffleVectorInst(Value *V1, Value *V2, Value *Mask,
860 const std::string &Name = "", Instruction *InsertBefor = 0);
861 ShuffleVectorInst(Value *V1, Value *V2, Value *Mask,
862 const std::string &Name, BasicBlock *InsertAtEnd);
864 /// isValidOperands - Return true if a shufflevector instruction can be
865 /// formed with the specified operands.
866 static bool isValidOperands(const Value *V1, const Value *V2,
869 virtual ShuffleVectorInst *clone() const;
871 virtual bool mayWriteToMemory() const { return false; }
873 /// getType - Overload to return most specific packed type.
875 inline const PackedType *getType() const {
876 return reinterpret_cast<const PackedType*>(Instruction::getType());
879 /// Transparently provide more efficient getOperand methods.
880 Value *getOperand(unsigned i) const {
881 assert(i < 3 && "getOperand() out of range!");
884 void setOperand(unsigned i, Value *Val) {
885 assert(i < 3 && "setOperand() out of range!");
888 unsigned getNumOperands() const { return 3; }
890 // Methods for support type inquiry through isa, cast, and dyn_cast:
891 static inline bool classof(const ShuffleVectorInst *) { return true; }
892 static inline bool classof(const Instruction *I) {
893 return I->getOpcode() == Instruction::ShuffleVector;
895 static inline bool classof(const Value *V) {
896 return isa<Instruction>(V) && classof(cast<Instruction>(V));
901 //===----------------------------------------------------------------------===//
903 //===----------------------------------------------------------------------===//
905 // PHINode - The PHINode class is used to represent the magical mystical PHI
906 // node, that can not exist in nature, but can be synthesized in a computer
907 // scientist's overactive imagination.
909 class PHINode : public Instruction {
910 /// ReservedSpace - The number of operands actually allocated. NumOperands is
911 /// the number actually in use.
912 unsigned ReservedSpace;
913 PHINode(const PHINode &PN);
915 PHINode(const Type *Ty, const std::string &Name = "",
916 Instruction *InsertBefore = 0)
917 : Instruction(Ty, Instruction::PHI, 0, 0, Name, InsertBefore),
921 PHINode(const Type *Ty, const std::string &Name, BasicBlock *InsertAtEnd)
922 : Instruction(Ty, Instruction::PHI, 0, 0, Name, InsertAtEnd),
928 /// reserveOperandSpace - This method can be used to avoid repeated
929 /// reallocation of PHI operand lists by reserving space for the correct
930 /// number of operands before adding them. Unlike normal vector reserves,
931 /// this method can also be used to trim the operand space.
932 void reserveOperandSpace(unsigned NumValues) {
933 resizeOperands(NumValues*2);
936 virtual PHINode *clone() const;
938 /// getNumIncomingValues - Return the number of incoming edges
940 unsigned getNumIncomingValues() const { return getNumOperands()/2; }
942 /// getIncomingValue - Return incoming value number x
944 Value *getIncomingValue(unsigned i) const {
945 assert(i*2 < getNumOperands() && "Invalid value number!");
946 return getOperand(i*2);
948 void setIncomingValue(unsigned i, Value *V) {
949 assert(i*2 < getNumOperands() && "Invalid value number!");
952 unsigned getOperandNumForIncomingValue(unsigned i) {
956 /// getIncomingBlock - Return incoming basic block number x
958 BasicBlock *getIncomingBlock(unsigned i) const {
959 return reinterpret_cast<BasicBlock*>(getOperand(i*2+1));
961 void setIncomingBlock(unsigned i, BasicBlock *BB) {
962 setOperand(i*2+1, reinterpret_cast<Value*>(BB));
964 unsigned getOperandNumForIncomingBlock(unsigned i) {
968 /// addIncoming - Add an incoming value to the end of the PHI list
970 void addIncoming(Value *V, BasicBlock *BB) {
971 assert(getType() == V->getType() &&
972 "All operands to PHI node must be the same type as the PHI node!");
973 unsigned OpNo = NumOperands;
974 if (OpNo+2 > ReservedSpace)
975 resizeOperands(0); // Get more space!
976 // Initialize some new operands.
977 NumOperands = OpNo+2;
978 OperandList[OpNo].init(V, this);
979 OperandList[OpNo+1].init(reinterpret_cast<Value*>(BB), this);
982 /// removeIncomingValue - Remove an incoming value. This is useful if a
983 /// predecessor basic block is deleted. The value removed is returned.
985 /// If the last incoming value for a PHI node is removed (and DeletePHIIfEmpty
986 /// is true), the PHI node is destroyed and any uses of it are replaced with
987 /// dummy values. The only time there should be zero incoming values to a PHI
988 /// node is when the block is dead, so this strategy is sound.
990 Value *removeIncomingValue(unsigned Idx, bool DeletePHIIfEmpty = true);
992 Value *removeIncomingValue(const BasicBlock *BB, bool DeletePHIIfEmpty =true){
993 int Idx = getBasicBlockIndex(BB);
994 assert(Idx >= 0 && "Invalid basic block argument to remove!");
995 return removeIncomingValue(Idx, DeletePHIIfEmpty);
998 /// getBasicBlockIndex - Return the first index of the specified basic
999 /// block in the value list for this PHI. Returns -1 if no instance.
1001 int getBasicBlockIndex(const BasicBlock *BB) const {
1002 Use *OL = OperandList;
1003 for (unsigned i = 0, e = getNumOperands(); i != e; i += 2)
1004 if (OL[i+1] == reinterpret_cast<const Value*>(BB)) return i/2;
1008 Value *getIncomingValueForBlock(const BasicBlock *BB) const {
1009 return getIncomingValue(getBasicBlockIndex(BB));
1012 /// hasConstantValue - If the specified PHI node always merges together the
1013 /// same value, return the value, otherwise return null.
1015 Value *hasConstantValue(bool AllowNonDominatingInstruction = false) const;
1017 /// Methods for support type inquiry through isa, cast, and dyn_cast:
1018 static inline bool classof(const PHINode *) { return true; }
1019 static inline bool classof(const Instruction *I) {
1020 return I->getOpcode() == Instruction::PHI;
1022 static inline bool classof(const Value *V) {
1023 return isa<Instruction>(V) && classof(cast<Instruction>(V));
1026 void resizeOperands(unsigned NumOperands);
1029 //===----------------------------------------------------------------------===//
1031 //===----------------------------------------------------------------------===//
1033 //===---------------------------------------------------------------------------
1034 /// ReturnInst - Return a value (possibly void), from a function. Execution
1035 /// does not continue in this function any longer.
1037 class ReturnInst : public TerminatorInst {
1038 Use RetVal; // Possibly null retval.
1039 ReturnInst(const ReturnInst &RI) : TerminatorInst(Instruction::Ret, &RetVal,
1040 RI.getNumOperands()) {
1041 if (RI.getNumOperands())
1042 RetVal.init(RI.RetVal, this);
1045 void init(Value *RetVal);
1048 // ReturnInst constructors:
1049 // ReturnInst() - 'ret void' instruction
1050 // ReturnInst( null) - 'ret void' instruction
1051 // ReturnInst(Value* X) - 'ret X' instruction
1052 // ReturnInst( null, Inst *) - 'ret void' instruction, insert before I
1053 // ReturnInst(Value* X, Inst *I) - 'ret X' instruction, insert before I
1054 // ReturnInst( null, BB *B) - 'ret void' instruction, insert @ end of BB
1055 // ReturnInst(Value* X, BB *B) - 'ret X' instruction, insert @ end of BB
1057 // NOTE: If the Value* passed is of type void then the constructor behaves as
1058 // if it was passed NULL.
1059 ReturnInst(Value *retVal = 0, Instruction *InsertBefore = 0)
1060 : TerminatorInst(Instruction::Ret, &RetVal, 0, InsertBefore) {
1063 ReturnInst(Value *retVal, BasicBlock *InsertAtEnd)
1064 : TerminatorInst(Instruction::Ret, &RetVal, 0, InsertAtEnd) {
1067 ReturnInst(BasicBlock *InsertAtEnd)
1068 : TerminatorInst(Instruction::Ret, &RetVal, 0, InsertAtEnd) {
1071 virtual ReturnInst *clone() const;
1073 // Transparently provide more efficient getOperand methods.
1074 Value *getOperand(unsigned i) const {
1075 assert(i < getNumOperands() && "getOperand() out of range!");
1078 void setOperand(unsigned i, Value *Val) {
1079 assert(i < getNumOperands() && "setOperand() out of range!");
1083 Value *getReturnValue() const { return RetVal; }
1085 unsigned getNumSuccessors() const { return 0; }
1087 // Methods for support type inquiry through isa, cast, and dyn_cast:
1088 static inline bool classof(const ReturnInst *) { return true; }
1089 static inline bool classof(const Instruction *I) {
1090 return (I->getOpcode() == Instruction::Ret);
1092 static inline bool classof(const Value *V) {
1093 return isa<Instruction>(V) && classof(cast<Instruction>(V));
1096 virtual BasicBlock *getSuccessorV(unsigned idx) const;
1097 virtual unsigned getNumSuccessorsV() const;
1098 virtual void setSuccessorV(unsigned idx, BasicBlock *B);
1101 //===----------------------------------------------------------------------===//
1103 //===----------------------------------------------------------------------===//
1105 //===---------------------------------------------------------------------------
1106 /// BranchInst - Conditional or Unconditional Branch instruction.
1108 class BranchInst : public TerminatorInst {
1109 /// Ops list - Branches are strange. The operands are ordered:
1110 /// TrueDest, FalseDest, Cond. This makes some accessors faster because
1111 /// they don't have to check for cond/uncond branchness.
1113 BranchInst(const BranchInst &BI);
1116 // BranchInst constructors (where {B, T, F} are blocks, and C is a condition):
1117 // BranchInst(BB *B) - 'br B'
1118 // BranchInst(BB* T, BB *F, Value *C) - 'br C, T, F'
1119 // BranchInst(BB* B, Inst *I) - 'br B' insert before I
1120 // BranchInst(BB* T, BB *F, Value *C, Inst *I) - 'br C, T, F', insert before I
1121 // BranchInst(BB* B, BB *I) - 'br B' insert at end
1122 // BranchInst(BB* T, BB *F, Value *C, BB *I) - 'br C, T, F', insert at end
1123 BranchInst(BasicBlock *IfTrue, Instruction *InsertBefore = 0)
1124 : TerminatorInst(Instruction::Br, Ops, 1, InsertBefore) {
1125 assert(IfTrue != 0 && "Branch destination may not be null!");
1126 Ops[0].init(reinterpret_cast<Value*>(IfTrue), this);
1128 BranchInst(BasicBlock *IfTrue, BasicBlock *IfFalse, Value *Cond,
1129 Instruction *InsertBefore = 0)
1130 : TerminatorInst(Instruction::Br, Ops, 3, InsertBefore) {
1131 Ops[0].init(reinterpret_cast<Value*>(IfTrue), this);
1132 Ops[1].init(reinterpret_cast<Value*>(IfFalse), this);
1133 Ops[2].init(Cond, this);
1139 BranchInst(BasicBlock *IfTrue, BasicBlock *InsertAtEnd)
1140 : TerminatorInst(Instruction::Br, Ops, 1, InsertAtEnd) {
1141 assert(IfTrue != 0 && "Branch destination may not be null!");
1142 Ops[0].init(reinterpret_cast<Value*>(IfTrue), this);
1145 BranchInst(BasicBlock *IfTrue, BasicBlock *IfFalse, Value *Cond,
1146 BasicBlock *InsertAtEnd)
1147 : TerminatorInst(Instruction::Br, Ops, 3, InsertAtEnd) {
1148 Ops[0].init(reinterpret_cast<Value*>(IfTrue), this);
1149 Ops[1].init(reinterpret_cast<Value*>(IfFalse), this);
1150 Ops[2].init(Cond, this);
1157 /// Transparently provide more efficient getOperand methods.
1158 Value *getOperand(unsigned i) const {
1159 assert(i < getNumOperands() && "getOperand() out of range!");
1162 void setOperand(unsigned i, Value *Val) {
1163 assert(i < getNumOperands() && "setOperand() out of range!");
1167 virtual BranchInst *clone() const;
1169 inline bool isUnconditional() const { return getNumOperands() == 1; }
1170 inline bool isConditional() const { return getNumOperands() == 3; }
1172 inline Value *getCondition() const {
1173 assert(isConditional() && "Cannot get condition of an uncond branch!");
1174 return getOperand(2);
1177 void setCondition(Value *V) {
1178 assert(isConditional() && "Cannot set condition of unconditional branch!");
1182 // setUnconditionalDest - Change the current branch to an unconditional branch
1183 // targeting the specified block.
1184 // FIXME: Eliminate this ugly method.
1185 void setUnconditionalDest(BasicBlock *Dest) {
1186 if (isConditional()) { // Convert this to an uncond branch.
1191 setOperand(0, reinterpret_cast<Value*>(Dest));
1194 unsigned getNumSuccessors() const { return 1+isConditional(); }
1196 BasicBlock *getSuccessor(unsigned i) const {
1197 assert(i < getNumSuccessors() && "Successor # out of range for Branch!");
1198 return (i == 0) ? cast<BasicBlock>(getOperand(0)) :
1199 cast<BasicBlock>(getOperand(1));
1202 void setSuccessor(unsigned idx, BasicBlock *NewSucc) {
1203 assert(idx < getNumSuccessors() && "Successor # out of range for Branch!");
1204 setOperand(idx, reinterpret_cast<Value*>(NewSucc));
1207 // Methods for support type inquiry through isa, cast, and dyn_cast:
1208 static inline bool classof(const BranchInst *) { return true; }
1209 static inline bool classof(const Instruction *I) {
1210 return (I->getOpcode() == Instruction::Br);
1212 static inline bool classof(const Value *V) {
1213 return isa<Instruction>(V) && classof(cast<Instruction>(V));
1216 virtual BasicBlock *getSuccessorV(unsigned idx) const;
1217 virtual unsigned getNumSuccessorsV() const;
1218 virtual void setSuccessorV(unsigned idx, BasicBlock *B);
1221 //===----------------------------------------------------------------------===//
1223 //===----------------------------------------------------------------------===//
1225 //===---------------------------------------------------------------------------
1226 /// SwitchInst - Multiway switch
1228 class SwitchInst : public TerminatorInst {
1229 unsigned ReservedSpace;
1230 // Operand[0] = Value to switch on
1231 // Operand[1] = Default basic block destination
1232 // Operand[2n ] = Value to match
1233 // Operand[2n+1] = BasicBlock to go to on match
1234 SwitchInst(const SwitchInst &RI);
1235 void init(Value *Value, BasicBlock *Default, unsigned NumCases);
1236 void resizeOperands(unsigned No);
1238 /// SwitchInst ctor - Create a new switch instruction, specifying a value to
1239 /// switch on and a default destination. The number of additional cases can
1240 /// be specified here to make memory allocation more efficient. This
1241 /// constructor can also autoinsert before another instruction.
1242 SwitchInst(Value *Value, BasicBlock *Default, unsigned NumCases,
1243 Instruction *InsertBefore = 0)
1244 : TerminatorInst(Instruction::Switch, 0, 0, InsertBefore) {
1245 init(Value, Default, NumCases);
1248 /// SwitchInst ctor - Create a new switch instruction, specifying a value to
1249 /// switch on and a default destination. The number of additional cases can
1250 /// be specified here to make memory allocation more efficient. This
1251 /// constructor also autoinserts at the end of the specified BasicBlock.
1252 SwitchInst(Value *Value, BasicBlock *Default, unsigned NumCases,
1253 BasicBlock *InsertAtEnd)
1254 : TerminatorInst(Instruction::Switch, 0, 0, InsertAtEnd) {
1255 init(Value, Default, NumCases);
1260 // Accessor Methods for Switch stmt
1261 inline Value *getCondition() const { return getOperand(0); }
1262 void setCondition(Value *V) { setOperand(0, V); }
1264 inline BasicBlock *getDefaultDest() const {
1265 return cast<BasicBlock>(getOperand(1));
1268 /// getNumCases - return the number of 'cases' in this switch instruction.
1269 /// Note that case #0 is always the default case.
1270 unsigned getNumCases() const {
1271 return getNumOperands()/2;
1274 /// getCaseValue - Return the specified case value. Note that case #0, the
1275 /// default destination, does not have a case value.
1276 ConstantInt *getCaseValue(unsigned i) {
1277 assert(i && i < getNumCases() && "Illegal case value to get!");
1278 return getSuccessorValue(i);
1281 /// getCaseValue - Return the specified case value. Note that case #0, the
1282 /// default destination, does not have a case value.
1283 const ConstantInt *getCaseValue(unsigned i) const {
1284 assert(i && i < getNumCases() && "Illegal case value to get!");
1285 return getSuccessorValue(i);
1288 /// findCaseValue - Search all of the case values for the specified constant.
1289 /// If it is explicitly handled, return the case number of it, otherwise
1290 /// return 0 to indicate that it is handled by the default handler.
1291 unsigned findCaseValue(const ConstantInt *C) const {
1292 for (unsigned i = 1, e = getNumCases(); i != e; ++i)
1293 if (getCaseValue(i) == C)
1298 /// addCase - Add an entry to the switch instruction...
1300 void addCase(ConstantInt *OnVal, BasicBlock *Dest);
1302 /// removeCase - This method removes the specified successor from the switch
1303 /// instruction. Note that this cannot be used to remove the default
1304 /// destination (successor #0).
1306 void removeCase(unsigned idx);
1308 virtual SwitchInst *clone() const;
1310 unsigned getNumSuccessors() const { return getNumOperands()/2; }
1311 BasicBlock *getSuccessor(unsigned idx) const {
1312 assert(idx < getNumSuccessors() &&"Successor idx out of range for switch!");
1313 return cast<BasicBlock>(getOperand(idx*2+1));
1315 void setSuccessor(unsigned idx, BasicBlock *NewSucc) {
1316 assert(idx < getNumSuccessors() && "Successor # out of range for switch!");
1317 setOperand(idx*2+1, reinterpret_cast<Value*>(NewSucc));
1320 // getSuccessorValue - Return the value associated with the specified
1322 inline ConstantInt *getSuccessorValue(unsigned idx) const {
1323 assert(idx < getNumSuccessors() && "Successor # out of range!");
1324 return reinterpret_cast<ConstantInt*>(getOperand(idx*2));
1327 // Methods for support type inquiry through isa, cast, and dyn_cast:
1328 static inline bool classof(const SwitchInst *) { return true; }
1329 static inline bool classof(const Instruction *I) {
1330 return I->getOpcode() == Instruction::Switch;
1332 static inline bool classof(const Value *V) {
1333 return isa<Instruction>(V) && classof(cast<Instruction>(V));
1336 virtual BasicBlock *getSuccessorV(unsigned idx) const;
1337 virtual unsigned getNumSuccessorsV() const;
1338 virtual void setSuccessorV(unsigned idx, BasicBlock *B);
1341 //===----------------------------------------------------------------------===//
1343 //===----------------------------------------------------------------------===//
1345 //===---------------------------------------------------------------------------
1347 /// InvokeInst - Invoke instruction. The SubclassData field is used to hold the
1348 /// calling convention of the call.
1350 class InvokeInst : public TerminatorInst {
1351 InvokeInst(const InvokeInst &BI);
1352 void init(Value *Fn, BasicBlock *IfNormal, BasicBlock *IfException,
1353 const std::vector<Value*> &Params);
1355 InvokeInst(Value *Fn, BasicBlock *IfNormal, BasicBlock *IfException,
1356 const std::vector<Value*> &Params, const std::string &Name = "",
1357 Instruction *InsertBefore = 0);
1358 InvokeInst(Value *Fn, BasicBlock *IfNormal, BasicBlock *IfException,
1359 const std::vector<Value*> &Params, const std::string &Name,
1360 BasicBlock *InsertAtEnd);
1363 virtual InvokeInst *clone() const;
1365 bool mayWriteToMemory() const { return true; }
1367 /// getCallingConv/setCallingConv - Get or set the calling convention of this
1369 unsigned getCallingConv() const { return SubclassData; }
1370 void setCallingConv(unsigned CC) {
1374 /// getCalledFunction - Return the function called, or null if this is an
1375 /// indirect function invocation.
1377 Function *getCalledFunction() const {
1378 return dyn_cast<Function>(getOperand(0));
1381 // getCalledValue - Get a pointer to a function that is invoked by this inst.
1382 inline Value *getCalledValue() const { return getOperand(0); }
1384 // get*Dest - Return the destination basic blocks...
1385 BasicBlock *getNormalDest() const {
1386 return cast<BasicBlock>(getOperand(1));
1388 BasicBlock *getUnwindDest() const {
1389 return cast<BasicBlock>(getOperand(2));
1391 void setNormalDest(BasicBlock *B) {
1392 setOperand(1, reinterpret_cast<Value*>(B));
1395 void setUnwindDest(BasicBlock *B) {
1396 setOperand(2, reinterpret_cast<Value*>(B));
1399 inline BasicBlock *getSuccessor(unsigned i) const {
1400 assert(i < 2 && "Successor # out of range for invoke!");
1401 return i == 0 ? getNormalDest() : getUnwindDest();
1404 void setSuccessor(unsigned idx, BasicBlock *NewSucc) {
1405 assert(idx < 2 && "Successor # out of range for invoke!");
1406 setOperand(idx+1, reinterpret_cast<Value*>(NewSucc));
1409 unsigned getNumSuccessors() const { return 2; }
1411 // Methods for support type inquiry through isa, cast, and dyn_cast:
1412 static inline bool classof(const InvokeInst *) { return true; }
1413 static inline bool classof(const Instruction *I) {
1414 return (I->getOpcode() == Instruction::Invoke);
1416 static inline bool classof(const Value *V) {
1417 return isa<Instruction>(V) && classof(cast<Instruction>(V));
1420 virtual BasicBlock *getSuccessorV(unsigned idx) const;
1421 virtual unsigned getNumSuccessorsV() const;
1422 virtual void setSuccessorV(unsigned idx, BasicBlock *B);
1426 //===----------------------------------------------------------------------===//
1428 //===----------------------------------------------------------------------===//
1430 //===---------------------------------------------------------------------------
1431 /// UnwindInst - Immediately exit the current function, unwinding the stack
1432 /// until an invoke instruction is found.
1434 class UnwindInst : public TerminatorInst {
1436 UnwindInst(Instruction *InsertBefore = 0)
1437 : TerminatorInst(Instruction::Unwind, 0, 0, InsertBefore) {
1439 UnwindInst(BasicBlock *InsertAtEnd)
1440 : TerminatorInst(Instruction::Unwind, 0, 0, InsertAtEnd) {
1443 virtual UnwindInst *clone() const;
1445 unsigned getNumSuccessors() const { return 0; }
1447 // Methods for support type inquiry through isa, cast, and dyn_cast:
1448 static inline bool classof(const UnwindInst *) { return true; }
1449 static inline bool classof(const Instruction *I) {
1450 return I->getOpcode() == Instruction::Unwind;
1452 static inline bool classof(const Value *V) {
1453 return isa<Instruction>(V) && classof(cast<Instruction>(V));
1456 virtual BasicBlock *getSuccessorV(unsigned idx) const;
1457 virtual unsigned getNumSuccessorsV() const;
1458 virtual void setSuccessorV(unsigned idx, BasicBlock *B);
1461 //===----------------------------------------------------------------------===//
1462 // UnreachableInst Class
1463 //===----------------------------------------------------------------------===//
1465 //===---------------------------------------------------------------------------
1466 /// UnreachableInst - This function has undefined behavior. In particular, the
1467 /// presence of this instruction indicates some higher level knowledge that the
1468 /// end of the block cannot be reached.
1470 class UnreachableInst : public TerminatorInst {
1472 UnreachableInst(Instruction *InsertBefore = 0)
1473 : TerminatorInst(Instruction::Unreachable, 0, 0, InsertBefore) {
1475 UnreachableInst(BasicBlock *InsertAtEnd)
1476 : TerminatorInst(Instruction::Unreachable, 0, 0, InsertAtEnd) {
1479 virtual UnreachableInst *clone() const;
1481 unsigned getNumSuccessors() const { return 0; }
1483 // Methods for support type inquiry through isa, cast, and dyn_cast:
1484 static inline bool classof(const UnreachableInst *) { return true; }
1485 static inline bool classof(const Instruction *I) {
1486 return I->getOpcode() == Instruction::Unreachable;
1488 static inline bool classof(const Value *V) {
1489 return isa<Instruction>(V) && classof(cast<Instruction>(V));
1492 virtual BasicBlock *getSuccessorV(unsigned idx) const;
1493 virtual unsigned getNumSuccessorsV() const;
1494 virtual void setSuccessorV(unsigned idx, BasicBlock *B);
1497 } // End llvm namespace