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Add method

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@18368 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2004-11-30 02:51:53 +00:00
parent 8cca1a7cbc
commit 38f1455393
2 changed files with 33 additions and 2 deletions
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6
include/llvm/Instruction.h
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@ -67,6 +67,12 @@ public:
/// * The instruction has no name
///
virtual Instruction *clone() const = 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 isIdenticalTo(Instruction *I) const;
// Accessor methods...
//

29
lib/VMCore/Instruction.cpp
View File

@ -11,14 +11,14 @@
//
//===----------------------------------------------------------------------===//
#include "llvm/Instructions.h"
#include "llvm/Function.h"
#include "llvm/SymbolTable.h"
#include "llvm/Type.h"
#include "llvm/Support/LeakDetector.h"
using namespace llvm;
void Instruction::init()
{
void Instruction::init() {
// Make sure that we get added to a basicblock
LeakDetector::addGarbageObject(this);
}
@ -134,6 +134,31 @@ const char *Instruction::getOpcodeName(unsigned OpCode) {
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 VANextInst *VAN = dyn_cast<VANextInst>(this))
return VAN->getArgType() == cast<VANextInst>(I)->getArgType();
return true;
}
/// isAssociative - Return true if the instruction is associative:
///