Chris Lattner | 0095054 | 2001-06-06 20:29:01 +0000 | [diff] [blame] | 1 | //===-- Instruction.cpp - Implement the Instruction class --------*- C++ -*--=// |
| 2 | // |
| 3 | // This file implements the Instruction class for the VMCore library. |
| 4 | // |
| 5 | //===----------------------------------------------------------------------===// |
| 6 | |
Chris Lattner | 2fbfdcf | 2002-04-07 20:49:59 +0000 | [diff] [blame] | 7 | #include "llvm/Function.h" |
Chris Lattner | 0095054 | 2001-06-06 20:29:01 +0000 | [diff] [blame] | 8 | #include "llvm/SymbolTable.h" |
Chris Lattner | 7e70829 | 2002-06-25 16:13:24 +0000 | [diff] [blame] | 9 | #include "llvm/Type.h" |
Chris Lattner | d1e693f | 2002-09-08 18:59:35 +0000 | [diff] [blame] | 10 | #include "Support/LeakDetector.h" |
Chris Lattner | 0095054 | 2001-06-06 20:29:01 +0000 | [diff] [blame] | 11 | |
Chris Lattner | 2aa8311 | 2002-09-10 15:45:53 +0000 | [diff] [blame] | 12 | Instruction::Instruction(const Type *ty, unsigned it, const std::string &Name, |
| 13 | Instruction *InsertBefore) |
Chris Lattner | 71947fd | 2002-02-03 07:52:58 +0000 | [diff] [blame] | 14 | : User(ty, Value::InstructionVal, Name) { |
Chris Lattner | 0095054 | 2001-06-06 20:29:01 +0000 | [diff] [blame] | 15 | Parent = 0; |
| 16 | iType = it; |
Chris Lattner | d1e693f | 2002-09-08 18:59:35 +0000 | [diff] [blame] | 17 | |
| 18 | // Make sure that we get added to a basicblock |
| 19 | LeakDetector::addGarbageObject(this); |
Chris Lattner | 2aa8311 | 2002-09-10 15:45:53 +0000 | [diff] [blame] | 20 | |
| 21 | // If requested, insert this instruction into a basic block... |
| 22 | if (InsertBefore) { |
| 23 | assert(InsertBefore->getParent() && |
| 24 | "Instruction to insert before is not in a basic block!"); |
| 25 | InsertBefore->getParent()->getInstList().insert(InsertBefore, this); |
| 26 | } |
Chris Lattner | 0095054 | 2001-06-06 20:29:01 +0000 | [diff] [blame] | 27 | } |
| 28 | |
Chris Lattner | bded132 | 2002-09-06 21:33:15 +0000 | [diff] [blame] | 29 | void Instruction::setParent(BasicBlock *P) { |
Chris Lattner | d1e693f | 2002-09-08 18:59:35 +0000 | [diff] [blame] | 30 | if (getParent()) |
| 31 | LeakDetector::addGarbageObject(this); |
| 32 | |
Chris Lattner | bded132 | 2002-09-06 21:33:15 +0000 | [diff] [blame] | 33 | Parent = P; |
Chris Lattner | d1e693f | 2002-09-08 18:59:35 +0000 | [diff] [blame] | 34 | |
| 35 | if (getParent()) |
| 36 | LeakDetector::removeGarbageObject(this); |
Chris Lattner | bded132 | 2002-09-06 21:33:15 +0000 | [diff] [blame] | 37 | } |
| 38 | |
Chris Lattner | 0095054 | 2001-06-06 20:29:01 +0000 | [diff] [blame] | 39 | // Specialize setName to take care of symbol table majik |
Chris Lattner | 697954c | 2002-01-20 22:54:45 +0000 | [diff] [blame] | 40 | void Instruction::setName(const std::string &name, SymbolTable *ST) { |
Chris Lattner | 2fbfdcf | 2002-04-07 20:49:59 +0000 | [diff] [blame] | 41 | BasicBlock *P = 0; Function *PP = 0; |
Chris Lattner | e05bf2f | 2001-09-07 16:47:03 +0000 | [diff] [blame] | 42 | assert((ST == 0 || !getParent() || !getParent()->getParent() || |
Chris Lattner | 6e6026b | 2002-11-20 18:36:02 +0000 | [diff] [blame^] | 43 | ST == &getParent()->getParent()->getSymbolTable()) && |
Chris Lattner | e05bf2f | 2001-09-07 16:47:03 +0000 | [diff] [blame] | 44 | "Invalid symtab argument!"); |
Chris Lattner | 0095054 | 2001-06-06 20:29:01 +0000 | [diff] [blame] | 45 | if ((P = getParent()) && (PP = P->getParent()) && hasName()) |
Chris Lattner | 6e6026b | 2002-11-20 18:36:02 +0000 | [diff] [blame^] | 46 | PP->getSymbolTable().remove(this); |
Chris Lattner | 0095054 | 2001-06-06 20:29:01 +0000 | [diff] [blame] | 47 | Value::setName(name); |
Chris Lattner | 6e6026b | 2002-11-20 18:36:02 +0000 | [diff] [blame^] | 48 | if (PP && hasName()) PP->getSymbolTable().insert(this); |
Chris Lattner | 0095054 | 2001-06-06 20:29:01 +0000 | [diff] [blame] | 49 | } |
Vikram S. Adve | c105645 | 2002-07-14 23:09:40 +0000 | [diff] [blame] | 50 | |
| 51 | |
| 52 | const char *Instruction::getOpcodeName(unsigned OpCode) { |
| 53 | switch (OpCode) { |
| 54 | // Terminators |
Chris Lattner | 0513e9f | 2002-08-14 18:18:02 +0000 | [diff] [blame] | 55 | case Ret: return "ret"; |
| 56 | case Br: return "br"; |
Vikram S. Adve | c105645 | 2002-07-14 23:09:40 +0000 | [diff] [blame] | 57 | case Switch: return "switch"; |
| 58 | case Invoke: return "invoke"; |
| 59 | |
Vikram S. Adve | c105645 | 2002-07-14 23:09:40 +0000 | [diff] [blame] | 60 | // Standard binary operators... |
| 61 | case Add: return "add"; |
| 62 | case Sub: return "sub"; |
| 63 | case Mul: return "mul"; |
| 64 | case Div: return "div"; |
| 65 | case Rem: return "rem"; |
| 66 | |
| 67 | // Logical operators... |
| 68 | case And: return "and"; |
| 69 | case Or : return "or"; |
| 70 | case Xor: return "xor"; |
| 71 | |
| 72 | // SetCC operators... |
| 73 | case SetLE: return "setle"; |
| 74 | case SetGE: return "setge"; |
| 75 | case SetLT: return "setlt"; |
| 76 | case SetGT: return "setgt"; |
| 77 | case SetEQ: return "seteq"; |
| 78 | case SetNE: return "setne"; |
| 79 | |
| 80 | // Memory instructions... |
| 81 | case Malloc: return "malloc"; |
| 82 | case Free: return "free"; |
| 83 | case Alloca: return "alloca"; |
| 84 | case Load: return "load"; |
| 85 | case Store: return "store"; |
| 86 | case GetElementPtr: return "getelementptr"; |
| 87 | |
| 88 | // Other instructions... |
| 89 | case PHINode: return "phi"; |
| 90 | case Cast: return "cast"; |
| 91 | case Call: return "call"; |
| 92 | case Shl: return "shl"; |
| 93 | case Shr: return "shr"; |
| 94 | |
| 95 | default: return "<Invalid operator> "; |
| 96 | } |
| 97 | |
| 98 | return 0; |
| 99 | } |
Chris Lattner | f2da724 | 2002-10-31 04:14:01 +0000 | [diff] [blame] | 100 | |
| 101 | |
| 102 | /// isAssociative - Return true if the instruction is associative: |
| 103 | /// |
| 104 | /// Associative operators satisfy: x op (y op z) === (x op y) op z) |
| 105 | /// |
| 106 | /// In LLVM, the Add, Mul, And, Or, and Xor operators are associative, when not |
| 107 | /// applied to floating point types. |
| 108 | /// |
| 109 | bool Instruction::isAssociative(unsigned Opcode, const Type *Ty) { |
| 110 | if (Opcode == Add || Opcode == Mul || |
| 111 | Opcode == And || Opcode == Or || Opcode == Xor) { |
| 112 | // Floating point operations do not associate! |
| 113 | return !Ty->isFloatingPoint(); |
| 114 | } |
| 115 | return 0; |
| 116 | } |
| 117 | |
| 118 | /// isCommutative - Return true if the instruction is commutative: |
| 119 | /// |
| 120 | /// Commutative operators satistify: (x op y) === (y op x) |
| 121 | /// |
| 122 | /// In LLVM, these are the associative operators, plus SetEQ and SetNE, when |
| 123 | /// applied to any type. |
| 124 | /// |
| 125 | bool Instruction::isCommutative(unsigned op) { |
| 126 | switch (op) { |
| 127 | case Add: |
| 128 | case Mul: |
| 129 | case And: |
| 130 | case Or: |
| 131 | case Xor: |
| 132 | case SetEQ: |
| 133 | case SetNE: |
| 134 | return true; |
| 135 | default: |
| 136 | return false; |
| 137 | } |
| 138 | } |