1 //===-- llvm/IntrinsicInst.h - Intrinsic Instruction Wrappers ---*- 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 classes that make it really easy to deal with intrinsic
11 // functions with the isa/dyncast family of functions. In particular, this
12 // allows you to do things like:
14 // if (MemCpyInst *MCI = dyn_cast<MemCpyInst>(Inst))
15 // ... MCI->getDest() ... MCI->getSource() ...
17 // All intrinsic function calls are instances of the call instruction, so these
18 // are all subclasses of the CallInst class. Note that none of these classes
19 // has state or virtual methods, which is an important part of this gross/neat
22 //===----------------------------------------------------------------------===//
24 #ifndef LLVM_INTRINSICINST_H
25 #define LLVM_INTRINSICINST_H
27 #include "llvm/Constants.h"
28 #include "llvm/Function.h"
29 #include "llvm/Instructions.h"
30 #include "llvm/Intrinsics.h"
33 /// IntrinsicInst - A useful wrapper class for inspecting calls to intrinsic
34 /// functions. This allows the standard isa/dyncast/cast functionality to
35 /// work with calls to intrinsic functions.
36 class IntrinsicInst : public CallInst {
37 IntrinsicInst(); // DO NOT IMPLEMENT
38 IntrinsicInst(const IntrinsicInst&); // DO NOT IMPLEMENT
39 void operator=(const IntrinsicInst&); // DO NOT IMPLEMENT
41 /// getIntrinsicID - Return the intrinsic ID of this intrinsic.
43 Intrinsic::ID getIntrinsicID() const {
44 return (Intrinsic::ID)getCalledFunction()->getIntrinsicID();
47 // Methods for support type inquiry through isa, cast, and dyn_cast:
48 static inline bool classof(const IntrinsicInst *) { return true; }
49 static inline bool classof(const CallInst *I) {
50 if (const Function *CF = I->getCalledFunction())
51 return CF->getIntrinsicID() != 0;
54 static inline bool classof(const Value *V) {
55 return isa<CallInst>(V) && classof(cast<CallInst>(V));
59 /// DbgInfoIntrinsic - This is the common base class for debug info intrinsics
61 class DbgInfoIntrinsic : public IntrinsicInst {
64 // Methods for support type inquiry through isa, cast, and dyn_cast:
65 static inline bool classof(const DbgInfoIntrinsic *) { return true; }
66 static inline bool classof(const IntrinsicInst *I) {
67 switch (I->getIntrinsicID()) {
68 case Intrinsic::dbg_declare:
69 case Intrinsic::dbg_value:
71 default: return false;
74 static inline bool classof(const Value *V) {
75 return isa<IntrinsicInst>(V) && classof(cast<IntrinsicInst>(V));
78 static Value *StripCast(Value *C);
81 /// DbgDeclareInst - This represents the llvm.dbg.declare instruction.
83 class DbgDeclareInst : public DbgInfoIntrinsic {
85 Value *getAddress() const { return getOperand(1); }
86 MDNode *getVariable() const { return cast<MDNode>(getOperand(2)); }
88 // Methods for support type inquiry through isa, cast, and dyn_cast:
89 static inline bool classof(const DbgDeclareInst *) { return true; }
90 static inline bool classof(const IntrinsicInst *I) {
91 return I->getIntrinsicID() == Intrinsic::dbg_declare;
93 static inline bool classof(const Value *V) {
94 return isa<IntrinsicInst>(V) && classof(cast<IntrinsicInst>(V));
98 /// DbgValueInst - This represents the llvm.dbg.value instruction.
100 class DbgValueInst : public DbgInfoIntrinsic {
102 Value *getValue() const;
103 Value *getOffset() const { return getOperand(2); }
104 MDNode *getVariable() const { return cast<MDNode>(getOperand(3)); }
106 // Methods for support type inquiry through isa, cast, and dyn_cast:
107 static inline bool classof(const DbgValueInst *) { return true; }
108 static inline bool classof(const IntrinsicInst *I) {
109 return I->getIntrinsicID() == Intrinsic::dbg_value;
111 static inline bool classof(const Value *V) {
112 return isa<IntrinsicInst>(V) && classof(cast<IntrinsicInst>(V));
116 /// MemIntrinsic - This is the common base class for memset/memcpy/memmove.
118 class MemIntrinsic : public IntrinsicInst {
120 Value *getRawDest() const { return const_cast<Value*>(getOperand(1)); }
122 Value *getLength() const { return const_cast<Value*>(getOperand(3)); }
123 ConstantInt *getAlignmentCst() const {
124 return cast<ConstantInt>(const_cast<Value*>(getOperand(4)));
127 unsigned getAlignment() const {
128 return getAlignmentCst()->getZExtValue();
131 /// getDest - This is just like getRawDest, but it strips off any cast
132 /// instructions that feed it, giving the original input. The returned
133 /// value is guaranteed to be a pointer.
134 Value *getDest() const { return getRawDest()->stripPointerCasts(); }
136 /// set* - Set the specified arguments of the instruction.
138 void setDest(Value *Ptr) {
139 assert(getRawDest()->getType() == Ptr->getType() &&
140 "setDest called with pointer of wrong type!");
144 void setLength(Value *L) {
145 assert(getLength()->getType() == L->getType() &&
146 "setLength called with value of wrong type!");
150 void setAlignment(Constant* A) {
154 const Type *getAlignmentType() const {
155 return getOperand(4)->getType();
158 // Methods for support type inquiry through isa, cast, and dyn_cast:
159 static inline bool classof(const MemIntrinsic *) { return true; }
160 static inline bool classof(const IntrinsicInst *I) {
161 switch (I->getIntrinsicID()) {
162 case Intrinsic::memcpy:
163 case Intrinsic::memmove:
164 case Intrinsic::memset:
166 default: return false;
169 static inline bool classof(const Value *V) {
170 return isa<IntrinsicInst>(V) && classof(cast<IntrinsicInst>(V));
174 /// MemSetInst - This class wraps the llvm.memset intrinsic.
176 class MemSetInst : public MemIntrinsic {
178 /// get* - Return the arguments to the instruction.
180 Value *getValue() const { return const_cast<Value*>(getOperand(2)); }
182 void setValue(Value *Val) {
183 assert(getValue()->getType() == Val->getType() &&
184 "setSource called with pointer of wrong type!");
188 // Methods for support type inquiry through isa, cast, and dyn_cast:
189 static inline bool classof(const MemSetInst *) { return true; }
190 static inline bool classof(const IntrinsicInst *I) {
191 return I->getIntrinsicID() == Intrinsic::memset;
193 static inline bool classof(const Value *V) {
194 return isa<IntrinsicInst>(V) && classof(cast<IntrinsicInst>(V));
198 /// MemTransferInst - This class wraps the llvm.memcpy/memmove intrinsics.
200 class MemTransferInst : public MemIntrinsic {
202 /// get* - Return the arguments to the instruction.
204 Value *getRawSource() const { return const_cast<Value*>(getOperand(2)); }
206 /// getSource - This is just like getRawSource, but it strips off any cast
207 /// instructions that feed it, giving the original input. The returned
208 /// value is guaranteed to be a pointer.
209 Value *getSource() const { return getRawSource()->stripPointerCasts(); }
211 void setSource(Value *Ptr) {
212 assert(getRawSource()->getType() == Ptr->getType() &&
213 "setSource called with pointer of wrong type!");
217 // Methods for support type inquiry through isa, cast, and dyn_cast:
218 static inline bool classof(const MemTransferInst *) { return true; }
219 static inline bool classof(const IntrinsicInst *I) {
220 return I->getIntrinsicID() == Intrinsic::memcpy ||
221 I->getIntrinsicID() == Intrinsic::memmove;
223 static inline bool classof(const Value *V) {
224 return isa<IntrinsicInst>(V) && classof(cast<IntrinsicInst>(V));
229 /// MemCpyInst - This class wraps the llvm.memcpy intrinsic.
231 class MemCpyInst : public MemTransferInst {
233 // Methods for support type inquiry through isa, cast, and dyn_cast:
234 static inline bool classof(const MemCpyInst *) { return true; }
235 static inline bool classof(const IntrinsicInst *I) {
236 return I->getIntrinsicID() == Intrinsic::memcpy;
238 static inline bool classof(const Value *V) {
239 return isa<IntrinsicInst>(V) && classof(cast<IntrinsicInst>(V));
243 /// MemMoveInst - This class wraps the llvm.memmove intrinsic.
245 class MemMoveInst : public MemTransferInst {
247 // Methods for support type inquiry through isa, cast, and dyn_cast:
248 static inline bool classof(const MemMoveInst *) { return true; }
249 static inline bool classof(const IntrinsicInst *I) {
250 return I->getIntrinsicID() == Intrinsic::memmove;
252 static inline bool classof(const Value *V) {
253 return isa<IntrinsicInst>(V) && classof(cast<IntrinsicInst>(V));
257 /// EHSelectorInst - This represents the llvm.eh.selector instruction.
259 class EHSelectorInst : public IntrinsicInst {
261 // Methods for support type inquiry through isa, cast, and dyn_cast:
262 static inline bool classof(const EHSelectorInst *) { return true; }
263 static inline bool classof(const IntrinsicInst *I) {
264 return I->getIntrinsicID() == Intrinsic::eh_selector;
266 static inline bool classof(const Value *V) {
267 return isa<IntrinsicInst>(V) && classof(cast<IntrinsicInst>(V));
271 /// MemoryUseIntrinsic - This is the common base class for the memory use
272 /// marker intrinsics.
274 class MemoryUseIntrinsic : public IntrinsicInst {
277 // Methods for support type inquiry through isa, cast, and dyn_cast:
278 static inline bool classof(const MemoryUseIntrinsic *) { return true; }
279 static inline bool classof(const IntrinsicInst *I) {
280 switch (I->getIntrinsicID()) {
281 case Intrinsic::lifetime_start:
282 case Intrinsic::lifetime_end:
283 case Intrinsic::invariant_start:
284 case Intrinsic::invariant_end:
286 default: return false;
289 static inline bool classof(const Value *V) {
290 return isa<IntrinsicInst>(V) && classof(cast<IntrinsicInst>(V));