1 //===-- llvm/InstrTypes.h - Important Instruction subclasses -----*- C++ -*--=//
3 // This file defines various meta classes of instructions that exist in the VM
4 // representation. Specific concrete subclasses of these may be found in the
7 //===----------------------------------------------------------------------===//
9 #ifndef LLVM_INSTRUCTION_TYPES_H
10 #define LLVM_INSTRUCTION_TYPES_H
12 #include "llvm/Instruction.h"
14 //===----------------------------------------------------------------------===//
15 // TerminatorInst Class
16 //===----------------------------------------------------------------------===//
18 // TerminatorInst - Subclasses of this class are all able to terminate a basic
19 // block. Thus, these are all the flow control type of operations.
21 class TerminatorInst : public Instruction {
23 TerminatorInst(Instruction::TermOps iType);
24 TerminatorInst(const Type *Ty, Instruction::TermOps iType,
25 const std::string &Name = "");
28 // Terminators must implement the methods required by Instruction...
29 virtual Instruction *clone() const = 0;
30 virtual const char *getOpcodeName() const = 0;
32 // Additionally, they must provide a method to get at the successors of this
33 // terminator instruction. 'idx' may not be >= the number of successors
34 // returned by getNumSuccessors()!
36 virtual const BasicBlock *getSuccessor(unsigned idx) const = 0;
37 virtual unsigned getNumSuccessors() const = 0;
38 virtual void setSuccessor(unsigned idx, BasicBlock *NewSucc) = 0;
40 inline BasicBlock *getSuccessor(unsigned idx) {
41 return (BasicBlock*)((const TerminatorInst *)this)->getSuccessor(idx);
44 // Methods for support type inquiry through isa, cast, and dyn_cast:
45 static inline bool classof(const TerminatorInst *) { return true; }
46 static inline bool classof(const Instruction *I) {
47 return I->getOpcode() >= FirstTermOp && I->getOpcode() < NumTermOps;
49 static inline bool classof(const Value *V) {
50 return isa<Instruction>(V) && classof(cast<Instruction>(V));
55 //===----------------------------------------------------------------------===//
56 // UnaryOperator Class
57 //===----------------------------------------------------------------------===//
59 class UnaryOperator : public Instruction {
61 UnaryOperator(Value *S, UnaryOps iType, const std::string &Name = "")
62 : Instruction(S->getType(), iType, Name) {
64 Operands.push_back(Use(S, this));
68 // create() - Construct a unary instruction, given the opcode
71 static UnaryOperator *create(UnaryOps Op, Value *Source);
73 inline UnaryOps getOpcode() const {
74 return (UnaryOps)Instruction::getOpcode();
77 virtual Instruction *clone() const {
78 return create(getOpcode(), Operands[0]);
81 virtual const char *getOpcodeName() const = 0;
83 // Methods for support type inquiry through isa, cast, and dyn_cast:
84 static inline bool classof(const UnaryOperator *) { return true; }
85 static inline bool classof(const Instruction *I) {
86 return I->getOpcode() >= FirstUnaryOp && I->getOpcode() < NumUnaryOps;
88 static inline bool classof(const Value *V) {
89 return isa<Instruction>(V) && classof(cast<Instruction>(V));
95 //===----------------------------------------------------------------------===//
96 // BinaryOperator Class
97 //===----------------------------------------------------------------------===//
99 class BinaryOperator : public Instruction {
101 BinaryOperator(BinaryOps iType, Value *S1, Value *S2,
102 const std::string &Name = "")
103 : Instruction(S1->getType(), iType, Name) {
105 Operands.push_back(Use(S1, this));
106 Operands.push_back(Use(S2, this));
107 assert(Operands[0] && Operands[1] &&
108 Operands[0]->getType() == Operands[1]->getType());
113 // create() - Construct a binary instruction, given the opcode
114 // and the two operands.
116 static BinaryOperator *create(BinaryOps Op, Value *S1, Value *S2,
117 const std::string &Name = "");
119 inline BinaryOps getOpcode() const {
120 return (BinaryOps)Instruction::getOpcode();
123 virtual Instruction *clone() const {
124 return create(getOpcode(), Operands[0], Operands[1]);
127 virtual const char *getOpcodeName() const = 0;
129 // swapOperands - Exchange the two operands to this instruction.
130 // This instruction is safe to use on any binary instruction and
131 // does not modify the semantics of the instruction. If the
132 // instruction is order dependant (SetLT f.e.) the opcode is
133 // changed. If the instruction cannot be reversed (ie, it's a Div),
138 // Methods for support type inquiry through isa, cast, and dyn_cast:
139 static inline bool classof(const BinaryOperator *) { return true; }
140 static inline bool classof(const Instruction *I) {
141 return I->getOpcode() >= FirstBinaryOp && I->getOpcode() < NumBinaryOps;
143 static inline bool classof(const Value *V) {
144 return isa<Instruction>(V) && classof(cast<Instruction>(V));