| //===-- Instruction.cpp - Implement the Instruction class -----------------===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file was developed by the LLVM research group and is distributed under |
| // the University of Illinois Open Source License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This file implements the Instruction class for the VMCore library. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "llvm/Instructions.h" |
| #include "llvm/Function.h" |
| #include "llvm/SymbolTable.h" |
| #include "llvm/Type.h" |
| #include "llvm/Support/LeakDetector.h" |
| using namespace llvm; |
| |
| Instruction::Instruction(const Type *ty, unsigned it, Use *Ops, unsigned NumOps, |
| const std::string &Name, Instruction *InsertBefore) |
| : User(ty, Value::InstructionVal + it, Ops, NumOps, Name), Parent(0) { |
| // 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); |
| } |
| } |
| |
| Instruction::Instruction(const Type *ty, unsigned it, Use *Ops, unsigned NumOps, |
| const std::string &Name, BasicBlock *InsertAtEnd) |
| : User(ty, Value::InstructionVal + it, Ops, NumOps, Name), Parent(0) { |
| // Make sure that we get added to a basicblock |
| LeakDetector::addGarbageObject(this); |
| |
| // append this instruction into the basic block |
| assert(InsertAtEnd && "Basic block to append to may not be NULL!"); |
| InsertAtEnd->getInstList().push_back(this); |
| } |
| |
| void Instruction::setOpcode(unsigned opc) { |
| setValueType(Value::InstructionVal + opc); |
| } |
| |
| void Instruction::setParent(BasicBlock *P) { |
| if (getParent()) { |
| if (!P) LeakDetector::addGarbageObject(this); |
| } else { |
| if (P) LeakDetector::removeGarbageObject(this); |
| } |
| |
| Parent = P; |
| } |
| |
| void Instruction::removeFromParent() { |
| getParent()->getInstList().remove(this); |
| } |
| |
| void Instruction::eraseFromParent() { |
| getParent()->getInstList().erase(this); |
| } |
| |
| /// moveBefore - Unlink this instruction from its current basic block and |
| /// insert it into the basic block that MovePos lives in, right before |
| /// MovePos. |
| void Instruction::moveBefore(Instruction *MovePos) { |
| MovePos->getParent()->getInstList().splice(MovePos,getParent()->getInstList(), |
| 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"; |
| case Unwind: return "unwind"; |
| case Unreachable: return "unreachable"; |
| |
| // 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 PHI: return "phi"; |
| case Cast: return "cast"; |
| case Select: return "select"; |
| case Call: return "call"; |
| case Shl: return "shl"; |
| case Shr: return "shr"; |
| case VAArg: return "va_arg"; |
| case ExtractElement: return "extractelement"; |
| |
| default: return "<Invalid operator> "; |
| } |
| |
| return 0; |
| } |
| |
| /// isIdenticalTo - Return true if the specified instruction is exactly |
| /// identical to the current one. This means that all operands match and any |
| /// extra information (e.g. load is volatile) agree. |
| bool Instruction::isIdenticalTo(Instruction *I) const { |
| if (getOpcode() != I->getOpcode() || |
| getNumOperands() != I->getNumOperands() || |
| getType() != I->getType()) |
| return false; |
| |
| // We have two instructions of identical opcode and #operands. Check to see |
| // if all operands are the same. |
| for (unsigned i = 0, e = getNumOperands(); i != e; ++i) |
| if (getOperand(i) != I->getOperand(i)) |
| return false; |
| |
| // Check special state that is a part of some instructions. |
| if (const LoadInst *LI = dyn_cast<LoadInst>(this)) |
| return LI->isVolatile() == cast<LoadInst>(I)->isVolatile(); |
| if (const StoreInst *SI = dyn_cast<StoreInst>(this)) |
| return SI->isVolatile() == cast<StoreInst>(I)->isVolatile(); |
| if (const CallInst *CI = dyn_cast<CallInst>(this)) |
| return CI->isTailCall() == cast<CallInst>(I)->isTailCall(); |
| return true; |
| } |
| |
| |
| /// 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 satisfy: (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; |
| } |
| } |
| |
| /// isRelational - Return true if the instruction is a Set* instruction: |
| /// |
| bool Instruction::isRelational(unsigned op) { |
| switch (op) { |
| case SetEQ: |
| case SetNE: |
| case SetLT: |
| case SetGT: |
| case SetLE: |
| case SetGE: |
| return true; |
| } |
| return false; |
| } |
| |
| |
| |
| /// isTrappingInstruction - Return true if the instruction may trap. |
| /// |
| bool Instruction::isTrapping(unsigned op) { |
| switch(op) { |
| case Div: |
| case Rem: |
| case Load: |
| case Store: |
| case Call: |
| case Invoke: |
| return true; |
| default: |
| return false; |
| } |
| } |