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constify getUnderlyingObject implementation [nfc]

This commit is contained in:
Philip Reames 2021-03-08 11:32:31 -08:00
parent ebe6161c54
commit d9a29a6752
2 changed files with 8 additions and 7 deletions
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9
llvm/include/llvm/Analysis/ValueTracking.h
View File

@ -370,10 +370,11 @@ constexpr unsigned MaxAnalysisRecursionDepth = 6;
/// that the returned value has pointer type if the specified value does. If
/// the MaxLookup value is non-zero, it limits the number of instructions to
/// be stripped off.
Value *getUnderlyingObject(Value *V, unsigned MaxLookup = 6);
inline const Value *getUnderlyingObject(const Value *V,
unsigned MaxLookup = 6) {
return getUnderlyingObject(const_cast<Value *>(V), MaxLookup);
const Value *getUnderlyingObject(const Value *V, unsigned MaxLookup = 6);
inline Value *getUnderlyingObject(Value *V, unsigned MaxLookup = 6) {
// Force const to avoid infinite recursion.
const Value *VConst = V;
return const_cast<Value *>(getUnderlyingObject(VConst, MaxLookup));
}
/// This method is similar to getUnderlyingObject except that it can

6
llvm/lib/Analysis/ValueTracking.cpp
View File

@ -4162,18 +4162,18 @@ static bool isSameUnderlyingObjectInLoop(const PHINode *PN,
return true;
}
Value *llvm::getUnderlyingObject(Value *V, unsigned MaxLookup) {
const Value *llvm::getUnderlyingObject(const Value *V, unsigned MaxLookup) {
if (!V->getType()->isPointerTy())
return V;
for (unsigned Count = 0; MaxLookup == 0 || Count < MaxLookup; ++Count) {
if (GEPOperator *GEP = dyn_cast<GEPOperator>(V)) {
if (auto *GEP = dyn_cast<GEPOperator>(V)) {
V = GEP->getPointerOperand();
} else if (Operator::getOpcode(V) == Instruction::BitCast ||
Operator::getOpcode(V) == Instruction::AddrSpaceCast) {
V = cast<Operator>(V)->getOperand(0);
if (!V->getType()->isPointerTy())
return V;
} else if (GlobalAlias *GA = dyn_cast<GlobalAlias>(V)) {
} else if (auto *GA = dyn_cast<GlobalAlias>(V)) {
if (GA->isInterposable())
return V;
V = GA->getAliasee();