}
Value *Value::stripPointerCasts() {
+ if (!isa<PointerType>(getType()))
+ return this;
+
if (ConstantExpr *CE = dyn_cast<ConstantExpr>(this)) {
if (CE->getOpcode() == Instruction::BitCast) {
- if (isa<PointerType>(CE->getOperand(0)->getType()))
- return CE->getOperand(0)->stripPointerCasts();
+ return CE->getOperand(0)->stripPointerCasts();
} else if (CE->getOpcode() == Instruction::GetElementPtr) {
for (unsigned i = 1, e = CE->getNumOperands(); i != e; ++i)
if (!CE->getOperand(i)->isNullValue())
return this;
return CE->getOperand(0)->stripPointerCasts();
}
- return this;
- }
-
- if (BitCastInst *CI = dyn_cast<BitCastInst>(this)) {
- if (isa<PointerType>(CI->getOperand(0)->getType()))
- return CI->getOperand(0)->stripPointerCasts();
+ } else if (BitCastInst *CI = dyn_cast<BitCastInst>(this)) {
+ return CI->getOperand(0)->stripPointerCasts();
} else if (GetElementPtrInst *GEP = dyn_cast<GetElementPtrInst>(this)) {
if (GEP->hasAllZeroIndices())
return GEP->getOperand(0)->stripPointerCasts();
return this;
}
+Value *Value::getUnderlyingObject() {
+ if (!isa<PointerType>(getType()))
+ return this;
+
+ if (Instruction *I = dyn_cast<Instruction>(this)) {
+ if (isa<BitCastInst>(I) || isa<GetElementPtrInst>(I))
+ return I->getOperand(0)->getUnderlyingObject();
+ } else if (ConstantExpr *CE = dyn_cast<ConstantExpr>(this)) {
+ if (CE->getOpcode() == Instruction::BitCast ||
+ CE->getOpcode() == Instruction::GetElementPtr)
+ return CE->getOperand(0)->getUnderlyingObject();
+ }
+ return this;
+}
+
//===----------------------------------------------------------------------===//
// User Class
//===----------------------------------------------------------------------===//