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"
20 Instruction::Instruction(const Type *ty, unsigned it, const std::string &Name,
21 Instruction *InsertBefore)
22 : User(ty, Value::InstructionVal, Name) {
26 // Make sure that we get added to a basicblock
27 LeakDetector::addGarbageObject(this);
29 // If requested, insert this instruction into a basic block...
31 assert(InsertBefore->getParent() &&
32 "Instruction to insert before is not in a basic block!");
33 InsertBefore->getParent()->getInstList().insert(InsertBefore, this);
37 void Instruction::setParent(BasicBlock *P) {
39 if (!P) LeakDetector::addGarbageObject(this);
41 if (P) LeakDetector::removeGarbageObject(this);
47 // Specialize setName to take care of symbol table majik
48 void Instruction::setName(const std::string &name, SymbolTable *ST) {
49 BasicBlock *P = 0; Function *PP = 0;
50 assert((ST == 0 || !getParent() || !getParent()->getParent() ||
51 ST == &getParent()->getParent()->getSymbolTable()) &&
52 "Invalid symtab argument!");
53 if ((P = getParent()) && (PP = P->getParent()) && hasName())
54 PP->getSymbolTable().remove(this);
56 if (PP && hasName()) PP->getSymbolTable().insert(this);
60 const char *Instruction::getOpcodeName(unsigned OpCode) {
63 case Ret: return "ret";
65 case Switch: return "switch";
66 case Invoke: return "invoke";
67 case Unwind: return "unwind";
69 // Standard binary operators...
70 case Add: return "add";
71 case Sub: return "sub";
72 case Mul: return "mul";
73 case Div: return "div";
74 case Rem: return "rem";
76 // Logical operators...
77 case And: return "and";
78 case Or : return "or";
79 case Xor: return "xor";
82 case SetLE: return "setle";
83 case SetGE: return "setge";
84 case SetLT: return "setlt";
85 case SetGT: return "setgt";
86 case SetEQ: return "seteq";
87 case SetNE: return "setne";
89 // Memory instructions...
90 case Malloc: return "malloc";
91 case Free: return "free";
92 case Alloca: return "alloca";
93 case Load: return "load";
94 case Store: return "store";
95 case GetElementPtr: return "getelementptr";
97 // Other instructions...
98 case PHI: return "phi";
99 case Cast: return "cast";
100 case Select: return "select";
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) {
152 /// isRelational - Return true if the instruction is a Set* instruction:
154 bool Instruction::isRelational(unsigned op) {
169 /// isTrappingInstruction - Return true if the instruction may trap.
171 bool Instruction::isTrapping(unsigned op) {