2003-10-13 03:32:08 +00:00
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//===-- Instruction.cpp - Implement the Instruction class -----------------===//
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2005-04-21 23:48:37 +00:00
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//
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2003-10-20 19:43:21 +00:00
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// The LLVM Compiler Infrastructure
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//
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// This file was developed by the LLVM research group and is distributed under
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// the University of Illinois Open Source License. See LICENSE.TXT for details.
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2005-04-21 23:48:37 +00:00
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//
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2003-10-20 19:43:21 +00:00
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//===----------------------------------------------------------------------===//
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2001-06-06 20:29:01 +00:00
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//
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// This file implements the Instruction class for the VMCore library.
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//
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//===----------------------------------------------------------------------===//
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2004-11-30 02:51:53 +00:00
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#include "llvm/Instructions.h"
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2002-04-07 20:49:59 +00:00
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#include "llvm/Function.h"
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2001-06-06 20:29:01 +00:00
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#include "llvm/SymbolTable.h"
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2002-06-25 16:13:24 +00:00
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#include "llvm/Type.h"
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2004-09-01 22:55:40 +00:00
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#include "llvm/Support/LeakDetector.h"
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2003-11-20 17:45:12 +00:00
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using namespace llvm;
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2003-11-11 22:41:34 +00:00
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2005-01-29 00:35:33 +00:00
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Instruction::Instruction(const Type *ty, unsigned it, Use *Ops, unsigned NumOps,
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const std::string &Name, Instruction *InsertBefore)
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: User(ty, Value::InstructionVal + it, Ops, NumOps, Name), Parent(0) {
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2002-09-08 18:59:35 +00:00
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// Make sure that we get added to a basicblock
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LeakDetector::addGarbageObject(this);
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2002-09-10 15:45:53 +00:00
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// If requested, insert this instruction into a basic block...
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if (InsertBefore) {
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assert(InsertBefore->getParent() &&
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"Instruction to insert before is not in a basic block!");
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InsertBefore->getParent()->getInstList().insert(InsertBefore, this);
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}
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2001-06-06 20:29:01 +00:00
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}
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2005-01-29 00:35:33 +00:00
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Instruction::Instruction(const Type *ty, unsigned it, Use *Ops, unsigned NumOps,
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const std::string &Name, BasicBlock *InsertAtEnd)
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: User(ty, Value::InstructionVal + it, Ops, NumOps, Name), Parent(0) {
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// Make sure that we get added to a basicblock
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LeakDetector::addGarbageObject(this);
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2004-05-26 21:41:09 +00:00
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// append this instruction into the basic block
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assert(InsertAtEnd && "Basic block to append to may not be NULL!");
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InsertAtEnd->getInstList().push_back(this);
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}
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2004-06-27 18:38:48 +00:00
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void Instruction::setOpcode(unsigned opc) {
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setValueType(Value::InstructionVal + opc);
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}
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2002-09-06 21:33:15 +00:00
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void Instruction::setParent(BasicBlock *P) {
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2004-02-04 01:06:38 +00:00
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if (getParent()) {
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if (!P) LeakDetector::addGarbageObject(this);
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} else {
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if (P) LeakDetector::removeGarbageObject(this);
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}
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2002-09-08 18:59:35 +00:00
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2002-09-06 21:33:15 +00:00
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Parent = P;
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}
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2004-10-11 22:21:39 +00:00
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void Instruction::removeFromParent() {
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getParent()->getInstList().remove(this);
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}
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void Instruction::eraseFromParent() {
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getParent()->getInstList().erase(this);
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}
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2002-07-14 23:09:40 +00:00
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2005-08-08 05:21:50 +00:00
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/// moveBefore - Unlink this instruction from its current basic block and
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/// insert it into the basic block that MovePos lives in, right before
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/// MovePos.
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void Instruction::moveBefore(Instruction *MovePos) {
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MovePos->getParent()->getInstList().splice(MovePos,getParent()->getInstList(),
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this);
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}
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2002-07-14 23:09:40 +00:00
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const char *Instruction::getOpcodeName(unsigned OpCode) {
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switch (OpCode) {
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// Terminators
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2002-08-14 18:18:02 +00:00
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case Ret: return "ret";
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case Br: return "br";
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2002-07-14 23:09:40 +00:00
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case Switch: return "switch";
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case Invoke: return "invoke";
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2003-09-08 18:54:36 +00:00
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case Unwind: return "unwind";
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2004-10-16 18:08:06 +00:00
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case Unreachable: return "unreachable";
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2005-04-21 23:48:37 +00:00
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2002-07-14 23:09:40 +00:00
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// Standard binary operators...
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case Add: return "add";
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case Sub: return "sub";
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case Mul: return "mul";
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case Div: return "div";
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case Rem: return "rem";
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// Logical operators...
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case And: return "and";
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case Or : return "or";
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case Xor: return "xor";
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// SetCC operators...
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case SetLE: return "setle";
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case SetGE: return "setge";
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case SetLT: return "setlt";
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case SetGT: return "setgt";
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case SetEQ: return "seteq";
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case SetNE: return "setne";
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2005-04-21 23:48:37 +00:00
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2002-07-14 23:09:40 +00:00
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// Memory instructions...
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case Malloc: return "malloc";
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case Free: return "free";
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case Alloca: return "alloca";
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case Load: return "load";
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case Store: return "store";
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case GetElementPtr: return "getelementptr";
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2005-04-21 23:48:37 +00:00
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2002-07-14 23:09:40 +00:00
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// Other instructions...
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2003-10-19 21:34:28 +00:00
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case PHI: return "phi";
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2002-07-14 23:09:40 +00:00
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case Cast: return "cast";
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2004-03-12 05:54:20 +00:00
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case Select: return "select";
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2002-07-14 23:09:40 +00:00
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case Call: return "call";
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case Shl: return "shl";
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case Shr: return "shr";
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2005-06-18 18:34:52 +00:00
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case VAArg: return "va_arg";
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2006-01-10 19:05:34 +00:00
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case ExtractElement: return "extractelement";
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2006-01-17 20:07:22 +00:00
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case InsertElement: return "insertelement";
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2006-04-08 01:18:18 +00:00
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case ShuffleVector: return "shufflevector";
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2003-05-08 02:44:12 +00:00
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2002-07-14 23:09:40 +00:00
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default: return "<Invalid operator> ";
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}
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2005-04-21 23:48:37 +00:00
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2002-07-14 23:09:40 +00:00
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return 0;
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}
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2002-10-31 04:14:01 +00:00
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2004-11-30 02:51:53 +00:00
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/// isIdenticalTo - Return true if the specified instruction is exactly
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/// identical to the current one. This means that all operands match and any
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/// extra information (e.g. load is volatile) agree.
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bool Instruction::isIdenticalTo(Instruction *I) const {
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if (getOpcode() != I->getOpcode() ||
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getNumOperands() != I->getNumOperands() ||
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getType() != I->getType())
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return false;
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// We have two instructions of identical opcode and #operands. Check to see
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// if all operands are the same.
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for (unsigned i = 0, e = getNumOperands(); i != e; ++i)
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if (getOperand(i) != I->getOperand(i))
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return false;
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// Check special state that is a part of some instructions.
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if (const LoadInst *LI = dyn_cast<LoadInst>(this))
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return LI->isVolatile() == cast<LoadInst>(I)->isVolatile();
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if (const StoreInst *SI = dyn_cast<StoreInst>(this))
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return SI->isVolatile() == cast<StoreInst>(I)->isVolatile();
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2005-05-06 05:51:46 +00:00
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if (const CallInst *CI = dyn_cast<CallInst>(this))
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return CI->isTailCall() == cast<CallInst>(I)->isTailCall();
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2004-11-30 02:51:53 +00:00
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return true;
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}
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2002-10-31 04:14:01 +00:00
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/// isAssociative - Return true if the instruction is associative:
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///
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/// Associative operators satisfy: x op (y op z) === (x op y) op z)
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///
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/// In LLVM, the Add, Mul, And, Or, and Xor operators are associative, when not
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/// applied to floating point types.
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///
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bool Instruction::isAssociative(unsigned Opcode, const Type *Ty) {
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if (Opcode == Add || Opcode == Mul ||
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Opcode == And || Opcode == Or || Opcode == Xor) {
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// Floating point operations do not associate!
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return !Ty->isFloatingPoint();
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}
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return 0;
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}
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/// isCommutative - Return true if the instruction is commutative:
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///
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2003-10-10 17:54:14 +00:00
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/// Commutative operators satisfy: (x op y) === (y op x)
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2002-10-31 04:14:01 +00:00
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///
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/// In LLVM, these are the associative operators, plus SetEQ and SetNE, when
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/// applied to any type.
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///
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bool Instruction::isCommutative(unsigned op) {
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switch (op) {
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case Add:
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case Mul:
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2005-04-21 23:48:37 +00:00
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case And:
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case Or:
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case Xor:
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case SetEQ:
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case SetNE:
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return true;
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default:
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return false;
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}
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}
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2003-07-31 04:05:50 +00:00
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2004-01-12 23:18:25 +00:00
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/// isRelational - Return true if the instruction is a Set* instruction:
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///
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bool Instruction::isRelational(unsigned op) {
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switch (op) {
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case SetEQ:
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case SetNE:
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case SetLT:
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case SetGT:
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case SetLE:
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case SetGE:
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return true;
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}
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return false;
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}
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2003-07-31 04:05:50 +00:00
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/// isTrappingInstruction - Return true if the instruction may trap.
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///
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2003-07-31 05:06:09 +00:00
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bool Instruction::isTrapping(unsigned op) {
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2003-07-31 04:05:50 +00:00
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switch(op) {
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case Div:
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case Rem:
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case Load:
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case Store:
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case Call:
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case Invoke:
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return true;
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default:
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return false;
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}
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}
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