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 ((const 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 ((const ArrayType*)getType()->getValueType())->isSized() &&
40 "Trying to allocate unsized array without size!");
44 // getType - Overload to return most specific pointer type...
45 inline const PointerType *getType() const {
46 return (const PointerType*)Instruction::getType();
49 virtual Instruction *clone() const = 0;
53 //===----------------------------------------------------------------------===//
55 //===----------------------------------------------------------------------===//
57 class MallocInst : public AllocationInst {
59 MallocInst(const Type *Ty, Value *ArraySize = 0, const string &Name = "")
60 : AllocationInst(Ty, ArraySize, Malloc, Name) {}
62 virtual Instruction *clone() const {
63 return new MallocInst(getType(), Operands.size() ? Operands[1] : 0);
66 virtual const char *getOpcodeName() const { return "malloc"; }
70 //===----------------------------------------------------------------------===//
72 //===----------------------------------------------------------------------===//
74 class AllocaInst : public AllocationInst {
76 AllocaInst(const Type *Ty, Value *ArraySize = 0, const string &Name = "")
77 : AllocationInst(Ty, ArraySize, Alloca, Name) {}
79 virtual Instruction *clone() const {
80 return new AllocaInst(getType(), Operands.size() ? Operands[1] : 0);
83 virtual const char *getOpcodeName() const { return "alloca"; }
87 //===----------------------------------------------------------------------===//
89 //===----------------------------------------------------------------------===//
91 class FreeInst : public Instruction {
93 FreeInst(Value *Ptr, const string &Name = "")
94 : Instruction(Type::VoidTy, Free, Name) {
95 assert(Ptr->getType()->isPointerType() && "Can't free nonpointer!");
97 Operands.push_back(Use(Ptr, this));
100 virtual Instruction *clone() const { return new FreeInst(Operands[0]); }
102 virtual const char *getOpcodeName() const { return "free"; }
104 virtual bool hasSideEffects() const { return true; }
108 //===----------------------------------------------------------------------===//
109 // MemAccessInst Class
110 //===----------------------------------------------------------------------===//
112 // MemAccessInst - Common base class of LoadInst, StoreInst, and
113 // GetElementPtrInst...
115 class MemAccessInst : public Instruction {
117 inline MemAccessInst(const Type *Ty, unsigned Opcode,
118 const vector<ConstPoolVal*> &Idx,
119 const string &Nam = "")
120 : Instruction(Ty, Opcode, Nam),
125 vector<ConstPoolVal*> indexVec;
128 // getIndexedType - Returns the type of the element that would be loaded with
129 // a load instruction with the specified parameters.
131 // A null type is returned if the indices are invalid for the specified
134 static const Type *getIndexedType(const Type *Ptr,
135 const vector<ConstPoolVal*> &Indices,
136 bool AllowStructLeaf = false);
138 const vector<ConstPoolVal*>& getIndexVec() const { return indexVec; }
140 virtual Value* getPtrOperand() = 0;
142 virtual int getFirstOffsetIdx() const = 0;
146 //===----------------------------------------------------------------------===//
148 //===----------------------------------------------------------------------===//
150 class LoadInst : public MemAccessInst {
151 LoadInst(const LoadInst &LI) : MemAccessInst(LI.getType(), Load, LI.getIndexVec()) {
152 Operands.reserve(LI.Operands.size());
153 for (unsigned i = 0, E = LI.Operands.size(); i != E; ++i)
154 Operands.push_back(Use(LI.Operands[i], this));
157 LoadInst(Value *Ptr, const vector<ConstPoolVal*> &Idx,
158 const string &Name = "");
159 virtual Instruction* clone() const { return new LoadInst(*this); }
160 virtual const char* getOpcodeName() const { return "load"; }
161 virtual Value* getPtrOperand() { return this->getOperand(0); }
162 virtual int getFirstOffsetIdx() const { return (this->getNumOperands() > 1)? 1 : -1;}
166 //===----------------------------------------------------------------------===//
168 //===----------------------------------------------------------------------===//
170 class StoreInst : public MemAccessInst {
171 StoreInst(const StoreInst &SI) : MemAccessInst(SI.getType(), Store, SI.getIndexVec()) {
172 Operands.reserve(SI.Operands.size());
173 for (unsigned i = 0, E = SI.Operands.size(); i != E; ++i)
174 Operands.push_back(Use(SI.Operands[i], this));
177 StoreInst(Value *Val, Value *Ptr, const vector<ConstPoolVal*> &Idx,
178 const string &Name = "");
179 virtual Instruction *clone() const { return new StoreInst(*this); }
180 virtual const char *getOpcodeName() const { return "store"; }
182 virtual bool hasSideEffects() const { return true; }
183 virtual Value* getPtrOperand() { return this->getOperand(1); }
184 virtual int getFirstOffsetIdx() const { return (this->getNumOperands() > 2)? 2 : -1;}
188 //===----------------------------------------------------------------------===//
189 // GetElementPtrInst Class
190 //===----------------------------------------------------------------------===//
192 class GetElementPtrInst : public MemAccessInst {
193 GetElementPtrInst(const GetElementPtrInst &EPI)
194 : MemAccessInst(EPI.getType(), GetElementPtr, EPI.getIndexVec()) {
195 Operands.reserve(EPI.Operands.size());
196 for (unsigned i = 0, E = EPI.Operands.size(); i != E; ++i)
197 Operands.push_back(Use(EPI.Operands[i], this));
200 GetElementPtrInst(Value *Ptr, const vector<ConstPoolVal*> &Idx,
201 const string &Name = "");
202 virtual Instruction *clone() const { return new GetElementPtrInst(*this); }
203 virtual const char *getOpcodeName() const { return "getelementptr"; }
204 virtual Value* getPtrOperand() { return this->getOperand(0); }
205 virtual int getFirstOffsetIdx() const { return (this->getNumOperands() > 1)? 1 : -1;}
207 inline bool isArraySelector() const { return !isStructSelector(); }
208 bool isStructSelector() const;
211 #endif // LLVM_IMEMORY_H