1 //===-- llvm/iMemory.h - Memory Operator node definitions --------*- C++ -*--=//
3 // This file contains the declarations of all of the memory related operators.
4 // This includes: malloc, free, alloca, load, store, getfield, putfield
6 //===----------------------------------------------------------------------===//
11 #include "llvm/Instruction.h"
12 #include "llvm/DerivedTypes.h"
14 //===----------------------------------------------------------------------===//
15 // AllocationInst Class
16 //===----------------------------------------------------------------------===//
18 // AllocationInst - This class is the common base class of MallocInst and
21 class AllocationInst : public Instruction {
23 AllocationInst(const Type *Ty, Value *ArraySize, unsigned iTy,
24 const string &Name = "")
25 : Instruction(Ty, iTy, Name) {
26 assert(Ty->isPointerType() && "Can't allocate a non pointer type!");
29 // Make sure they didn't try to specify a size for !(unsized array) type
30 assert(getType()->getValueType()->isArrayType() &&
31 cast<ArrayType>(getType()->getValueType())->isUnsized() &&
32 "Trying to allocate something other than unsized array, with size!");
35 Operands.push_back(Use(ArraySize, this));
37 // Make sure that the pointer is not to an unsized array!
38 assert(!getType()->getValueType()->isArrayType() ||
39 cast<const ArrayType>(getType()->getValueType())->isSized() &&
40 "Trying to allocate unsized array without size!");
44 // isArrayAllocation - Return true if there is an allocation size parameter
45 // to the allocation instruction.
47 inline bool isArrayAllocation() const { return Operands.size() == 1; }
49 inline const Value *getArraySize() const {
50 assert(isArrayAllocation()); return Operands[0];
52 inline Value *getArraySize() {
53 assert(isArrayAllocation()); return Operands[0];
56 // getType - Overload to return most specific pointer type...
57 inline const PointerType *getType() const {
58 return (const PointerType*)Instruction::getType();
61 // getAllocatedType - Return the type that is being allocated by the
63 inline const Type *getAllocatedType() const {
64 return getType()->getValueType();
67 virtual Instruction *clone() const = 0;
71 //===----------------------------------------------------------------------===//
73 //===----------------------------------------------------------------------===//
75 class MallocInst : public AllocationInst {
77 MallocInst(const Type *Ty, Value *ArraySize = 0, const string &Name = "")
78 : AllocationInst(Ty, ArraySize, Malloc, Name) {}
80 virtual Instruction *clone() const {
81 return new MallocInst(getType(),
82 Operands.size() ? (Value*)Operands[1].get() : 0);
85 virtual const char *getOpcodeName() const { return "malloc"; }
87 // Methods for support type inquiry through isa, cast, and dyn_cast:
88 static inline bool classof(const MallocInst *) { return true; }
89 static inline bool classof(const Instruction *I) {
90 return (I->getOpcode() == Instruction::Malloc);
92 static inline bool classof(const Value *V) {
93 return isa<Instruction>(V) && classof(cast<Instruction>(V));
98 //===----------------------------------------------------------------------===//
100 //===----------------------------------------------------------------------===//
102 class AllocaInst : public AllocationInst {
104 AllocaInst(const Type *Ty, Value *ArraySize = 0, const string &Name = "")
105 : AllocationInst(Ty, ArraySize, Alloca, Name) {}
107 virtual Instruction *clone() const {
108 return new AllocaInst(getType(),
109 Operands.size() ? (Value*)Operands[1].get() : 0);
112 virtual const char *getOpcodeName() const { return "alloca"; }
114 // Methods for support type inquiry through isa, cast, and dyn_cast:
115 static inline bool classof(const AllocaInst *) { return true; }
116 static inline bool classof(const Instruction *I) {
117 return (I->getOpcode() == Instruction::Alloca);
119 static inline bool classof(const Value *V) {
120 return isa<Instruction>(V) && classof(cast<Instruction>(V));
125 //===----------------------------------------------------------------------===//
127 //===----------------------------------------------------------------------===//
129 class FreeInst : public Instruction {
131 FreeInst(Value *Ptr, const string &Name = "")
132 : Instruction(Type::VoidTy, Free, Name) {
133 assert(Ptr->getType()->isPointerType() && "Can't free nonpointer!");
135 Operands.push_back(Use(Ptr, this));
138 virtual Instruction *clone() const { return new FreeInst(Operands[0]); }
140 virtual const char *getOpcodeName() const { return "free"; }
142 virtual bool hasSideEffects() const { return true; }
144 // Methods for support type inquiry through isa, cast, and dyn_cast:
145 static inline bool classof(const FreeInst *) { return true; }
146 static inline bool classof(const Instruction *I) {
147 return (I->getOpcode() == Instruction::Free);
149 static inline bool classof(const Value *V) {
150 return isa<Instruction>(V) && classof(cast<Instruction>(V));
155 //===----------------------------------------------------------------------===//
156 // MemAccessInst Class
157 //===----------------------------------------------------------------------===//
159 // MemAccessInst - Common base class of LoadInst, StoreInst, and
160 // GetElementPtrInst...
162 class MemAccessInst : public Instruction {
164 inline MemAccessInst(const Type *Ty, unsigned Opcode,
165 const vector<ConstPoolVal*> &Idx,
166 const string &Nam = "")
167 : Instruction(Ty, Opcode, Nam),
172 vector<ConstPoolVal*> indexVec;
175 // getIndexedType - Returns the type of the element that would be loaded with
176 // a load instruction with the specified parameters.
178 // A null type is returned if the indices are invalid for the specified
181 static const Type *getIndexedType(const Type *Ptr,
182 const vector<ConstPoolVal*> &Indices,
183 bool AllowStructLeaf = false);
185 const vector<ConstPoolVal*>& getIndexVec() const { return indexVec; }
187 virtual Value* getPtrOperand() = 0;
189 virtual int getFirstOffsetIdx() const = 0;
193 //===----------------------------------------------------------------------===//
195 //===----------------------------------------------------------------------===//
197 class LoadInst : public MemAccessInst {
198 LoadInst(const LoadInst &LI) : MemAccessInst(LI.getType(), Load, LI.getIndexVec()) {
199 Operands.reserve(LI.Operands.size());
200 for (unsigned i = 0, E = LI.Operands.size(); i != E; ++i)
201 Operands.push_back(Use(LI.Operands[i], this));
204 LoadInst(Value *Ptr, const vector<ConstPoolVal*> &Idx,
205 const string &Name = "");
206 virtual Instruction* clone() const { return new LoadInst(*this); }
207 virtual const char* getOpcodeName() const { return "load"; }
208 virtual Value* getPtrOperand() { return this->getOperand(0); }
209 virtual int getFirstOffsetIdx() const { return (this->getNumOperands() > 1)? 1 : -1;}
211 // Methods for support type inquiry through isa, cast, and dyn_cast:
212 static inline bool classof(const LoadInst *) { return true; }
213 static inline bool classof(const Instruction *I) {
214 return (I->getOpcode() == Instruction::Load);
216 static inline bool classof(const Value *V) {
217 return isa<Instruction>(V) && classof(cast<Instruction>(V));
222 //===----------------------------------------------------------------------===//
224 //===----------------------------------------------------------------------===//
226 class StoreInst : public MemAccessInst {
227 StoreInst(const StoreInst &SI) : MemAccessInst(SI.getType(), Store, SI.getIndexVec()) {
228 Operands.reserve(SI.Operands.size());
229 for (unsigned i = 0, E = SI.Operands.size(); i != E; ++i)
230 Operands.push_back(Use(SI.Operands[i], this));
233 StoreInst(Value *Val, Value *Ptr, const vector<ConstPoolVal*> &Idx,
234 const string &Name = "");
235 virtual Instruction *clone() const { return new StoreInst(*this); }
236 virtual const char *getOpcodeName() const { return "store"; }
238 virtual bool hasSideEffects() const { return true; }
239 virtual Value* getPtrOperand() { return this->getOperand(1); }
240 virtual int getFirstOffsetIdx() const { return (this->getNumOperands() > 2)? 2 : -1;}
242 // Methods for support type inquiry through isa, cast, and dyn_cast:
243 static inline bool classof(const StoreInst *) { return true; }
244 static inline bool classof(const Instruction *I) {
245 return (I->getOpcode() == Instruction::Store);
247 static inline bool classof(const Value *V) {
248 return isa<Instruction>(V) && classof(cast<Instruction>(V));
253 //===----------------------------------------------------------------------===//
254 // GetElementPtrInst Class
255 //===----------------------------------------------------------------------===//
257 class GetElementPtrInst : public MemAccessInst {
258 GetElementPtrInst(const GetElementPtrInst &EPI)
259 : MemAccessInst(EPI.getType(), GetElementPtr, EPI.getIndexVec()) {
260 Operands.reserve(EPI.Operands.size());
261 for (unsigned i = 0, E = EPI.Operands.size(); i != E; ++i)
262 Operands.push_back(Use(EPI.Operands[i], this));
265 GetElementPtrInst(Value *Ptr, const vector<ConstPoolVal*> &Idx,
266 const string &Name = "");
267 virtual Instruction *clone() const { return new GetElementPtrInst(*this); }
268 virtual const char *getOpcodeName() const { return "getelementptr"; }
269 virtual Value* getPtrOperand() { return this->getOperand(0); }
270 virtual int getFirstOffsetIdx() const { return (this->getNumOperands() > 1)? 1 : -1;}
272 inline bool isArraySelector() const { return !isStructSelector(); }
273 bool isStructSelector() const;
276 // Methods for support type inquiry through isa, cast, and dyn_cast:
277 static inline bool classof(const GetElementPtrInst *) { return true; }
278 static inline bool classof(const Instruction *I) {
279 return (I->getOpcode() == Instruction::GetElementPtr);
281 static inline bool classof(const Value *V) {
282 return isa<Instruction>(V) && classof(cast<Instruction>(V));
286 #endif // LLVM_IMEMORY_H