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ObjCARCContract: Use stripPointerCastsAndAliases

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This commit is contained in:
Matt Arsenault 2025-04-03 23:44:32 +07:00 committed by Matt Arsenault
parent 14866ada8d
commit 94bafd4dce
1 changed files with 9 additions and 23 deletions
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32
llvm/lib/Transforms/ObjCARC/ObjCARCContract.cpp
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@ -661,30 +661,16 @@ bool ObjCARCContract::run(Function &F, AAResults *A, DominatorTree *D) {
Value *Arg = cast<CallInst>(Inst)->getArgOperand(0);
// TODO: Change this to a do-while.
for (;;) {
ReplaceArgUses(Arg);
ReplaceArgUses(Arg);
// If Arg is a no-op casted pointer, strip one level of casts and iterate.
if (const BitCastInst *BI = dyn_cast<BitCastInst>(Arg))
Arg = BI->getOperand(0);
else if (isa<GEPOperator>(Arg) &&
cast<GEPOperator>(Arg)->hasAllZeroIndices())
Arg = cast<GEPOperator>(Arg)->getPointerOperand();
else if (isa<GlobalAlias>(Arg) &&
!cast<GlobalAlias>(Arg)->isInterposable())
Arg = cast<GlobalAlias>(Arg)->getAliasee();
else {
// If Arg is a PHI node, get PHIs that are equivalent to it and replace
// their uses.
if (PHINode *PN = dyn_cast<PHINode>(Arg)) {
SmallVector<Value *, 1> PHIList;
getEquivalentPHIs(*PN, PHIList);
for (Value *PHI : PHIList)
ReplaceArgUses(PHI);
}
break;
}
Arg = Arg->stripPointerCastsAndAliases();
// If Arg is a PHI node, get PHIs that are equivalent to it and replace
// their uses.
if (PHINode *PN = dyn_cast<PHINode>(Arg)) {
SmallVector<Value *, 1> PHIList;
getEquivalentPHIs(*PN, PHIList);
for (Value *PHI : PHIList)
ReplaceArgUses(PHI);
}
}