1 //===-- Instruction.cpp - Implement the Instruction class -----------------===//
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 implements the Instruction class for the VMCore library.
12 //===----------------------------------------------------------------------===//
14 #include "llvm/Function.h"
15 #include "llvm/SymbolTable.h"
16 #include "llvm/Type.h"
17 #include "Support/LeakDetector.h"
21 Instruction::Instruction(const Type *ty, unsigned it, const std::string &Name,
22 Instruction *InsertBefore)
23 : User(ty, Value::InstructionVal, Name) {
27 // Make sure that we get added to a basicblock
28 LeakDetector::addGarbageObject(this);
30 // If requested, insert this instruction into a basic block...
32 assert(InsertBefore->getParent() &&
33 "Instruction to insert before is not in a basic block!");
34 InsertBefore->getParent()->getInstList().insert(InsertBefore, this);
38 void Instruction::setParent(BasicBlock *P) {
40 LeakDetector::addGarbageObject(this);
45 LeakDetector::removeGarbageObject(this);
48 // Specialize setName to take care of symbol table majik
49 void Instruction::setName(const std::string &name, SymbolTable *ST) {
50 BasicBlock *P = 0; Function *PP = 0;
51 assert((ST == 0 || !getParent() || !getParent()->getParent() ||
52 ST == &getParent()->getParent()->getSymbolTable()) &&
53 "Invalid symtab argument!");
54 if ((P = getParent()) && (PP = P->getParent()) && hasName())
55 PP->getSymbolTable().remove(this);
57 if (PP && hasName()) PP->getSymbolTable().insert(this);
61 const char *Instruction::getOpcodeName(unsigned OpCode) {
64 case Ret: return "ret";
66 case Switch: return "switch";
67 case Invoke: return "invoke";
68 case Unwind: return "unwind";
70 // Standard binary operators...
71 case Add: return "add";
72 case Sub: return "sub";
73 case Mul: return "mul";
74 case Div: return "div";
75 case Rem: return "rem";
77 // Logical operators...
78 case And: return "and";
79 case Or : return "or";
80 case Xor: return "xor";
83 case SetLE: return "setle";
84 case SetGE: return "setge";
85 case SetLT: return "setlt";
86 case SetGT: return "setgt";
87 case SetEQ: return "seteq";
88 case SetNE: return "setne";
90 // Memory instructions...
91 case Malloc: return "malloc";
92 case Free: return "free";
93 case Alloca: return "alloca";
94 case Load: return "load";
95 case Store: return "store";
96 case GetElementPtr: return "getelementptr";
98 // Other instructions...
99 case PHI: return "phi";
100 case Cast: return "cast";
101 case Call: return "call";
102 case Shl: return "shl";
103 case Shr: return "shr";
104 case VANext: return "vanext";
105 case VAArg: return "vaarg";
107 default: return "<Invalid operator> ";
114 /// isAssociative - Return true if the instruction is associative:
116 /// Associative operators satisfy: x op (y op z) === (x op y) op z)
118 /// In LLVM, the Add, Mul, And, Or, and Xor operators are associative, when not
119 /// applied to floating point types.
121 bool Instruction::isAssociative(unsigned Opcode, const Type *Ty) {
122 if (Opcode == Add || Opcode == Mul ||
123 Opcode == And || Opcode == Or || Opcode == Xor) {
124 // Floating point operations do not associate!
125 return !Ty->isFloatingPoint();
130 /// isCommutative - Return true if the instruction is commutative:
132 /// Commutative operators satisfy: (x op y) === (y op x)
134 /// In LLVM, these are the associative operators, plus SetEQ and SetNE, when
135 /// applied to any type.
137 bool Instruction::isCommutative(unsigned op) {
153 /// isTrappingInstruction - Return true if the instruction may trap.
155 bool Instruction::isTrapping(unsigned op) {
169 } // End llvm namespace