| //===-- Instruction.cpp - Implement the Instruction class --------*- C++ -*--=// |
| // |
| // This file implements the Instruction class for the VMCore library. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "llvm/Function.h" |
| #include "llvm/SymbolTable.h" |
| #include "llvm/Type.h" |
| #include "Support/LeakDetector.h" |
| |
| Instruction::Instruction(const Type *ty, unsigned it, const std::string &Name, |
| Instruction *InsertBefore) |
| : User(ty, Value::InstructionVal, Name) { |
| Parent = 0; |
| iType = it; |
| |
| // Make sure that we get added to a basicblock |
| LeakDetector::addGarbageObject(this); |
| |
| // If requested, insert this instruction into a basic block... |
| if (InsertBefore) { |
| assert(InsertBefore->getParent() && |
| "Instruction to insert before is not in a basic block!"); |
| InsertBefore->getParent()->getInstList().insert(InsertBefore, this); |
| } |
| } |
| |
| void Instruction::setParent(BasicBlock *P) { |
| if (getParent()) |
| LeakDetector::addGarbageObject(this); |
| |
| Parent = P; |
| |
| if (getParent()) |
| LeakDetector::removeGarbageObject(this); |
| } |
| |
| // Specialize setName to take care of symbol table majik |
| void Instruction::setName(const std::string &name, SymbolTable *ST) { |
| BasicBlock *P = 0; Function *PP = 0; |
| assert((ST == 0 || !getParent() || !getParent()->getParent() || |
| ST == &getParent()->getParent()->getSymbolTable()) && |
| "Invalid symtab argument!"); |
| if ((P = getParent()) && (PP = P->getParent()) && hasName()) |
| PP->getSymbolTable().remove(this); |
| Value::setName(name); |
| if (PP && hasName()) PP->getSymbolTable().insert(this); |
| } |
| |
| |
| const char *Instruction::getOpcodeName(unsigned OpCode) { |
| switch (OpCode) { |
| // Terminators |
| case Ret: return "ret"; |
| case Br: return "br"; |
| case Switch: return "switch"; |
| case Invoke: return "invoke"; |
| |
| // Standard binary operators... |
| case Add: return "add"; |
| case Sub: return "sub"; |
| case Mul: return "mul"; |
| case Div: return "div"; |
| case Rem: return "rem"; |
| |
| // Logical operators... |
| case And: return "and"; |
| case Or : return "or"; |
| case Xor: return "xor"; |
| |
| // SetCC operators... |
| case SetLE: return "setle"; |
| case SetGE: return "setge"; |
| case SetLT: return "setlt"; |
| case SetGT: return "setgt"; |
| case SetEQ: return "seteq"; |
| case SetNE: return "setne"; |
| |
| // Memory instructions... |
| case Malloc: return "malloc"; |
| case Free: return "free"; |
| case Alloca: return "alloca"; |
| case Load: return "load"; |
| case Store: return "store"; |
| case GetElementPtr: return "getelementptr"; |
| |
| // Other instructions... |
| case PHINode: return "phi"; |
| case Cast: return "cast"; |
| case Call: return "call"; |
| case Shl: return "shl"; |
| case Shr: return "shr"; |
| |
| default: return "<Invalid operator> "; |
| } |
| |
| return 0; |
| } |
| |
| |
| /// isAssociative - Return true if the instruction is associative: |
| /// |
| /// Associative operators satisfy: x op (y op z) === (x op y) op z) |
| /// |
| /// In LLVM, the Add, Mul, And, Or, and Xor operators are associative, when not |
| /// applied to floating point types. |
| /// |
| bool Instruction::isAssociative(unsigned Opcode, const Type *Ty) { |
| if (Opcode == Add || Opcode == Mul || |
| Opcode == And || Opcode == Or || Opcode == Xor) { |
| // Floating point operations do not associate! |
| return !Ty->isFloatingPoint(); |
| } |
| return 0; |
| } |
| |
| /// isCommutative - Return true if the instruction is commutative: |
| /// |
| /// Commutative operators satistify: (x op y) === (y op x) |
| /// |
| /// In LLVM, these are the associative operators, plus SetEQ and SetNE, when |
| /// applied to any type. |
| /// |
| bool Instruction::isCommutative(unsigned op) { |
| switch (op) { |
| case Add: |
| case Mul: |
| case And: |
| case Or: |
| case Xor: |
| case SetEQ: |
| case SetNE: |
| return true; |
| default: |
| return false; |
| } |
| } |