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Move Value::getUnderlyingObject to be a standalone

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function so that it can live in Analysis instead of
VMCore.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121885 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman
2010-12-15 20:02:24 +00:00
parent d5f4bc2c33
commit 5034dd318a
16 changed files with 68 additions and 61 deletions
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21
lib/VMCore/Value.cpp
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@@ -346,27 +346,6 @@ Value *Value::stripPointerCasts() {
return V;
}
Value *Value::getUnderlyingObject(unsigned MaxLookup) {
if (!getType()->isPointerTy())
return this;
Value *V = this;
for (unsigned Count = 0; MaxLookup == 0 || Count < MaxLookup; ++Count) {
if (GEPOperator *GEP = dyn_cast<GEPOperator>(V)) {
V = GEP->getPointerOperand();
} else if (Operator::getOpcode(V) == Instruction::BitCast) {
V = cast<Operator>(V)->getOperand(0);
} else if (GlobalAlias *GA = dyn_cast<GlobalAlias>(V)) {
if (GA->mayBeOverridden())
return V;
V = GA->getAliasee();
} else {
return V;
}
assert(V->getType()->isPointerTy() && "Unexpected operand type!");
}
return V;
}
/// isDereferenceablePointer - Test if this value is always a pointer to
/// allocated and suitably aligned memory for a simple load or store.
bool Value::isDereferenceablePointer() const {