================
@@ -126,8 +126,21 @@ static void addLocAccess(MemoryEffects &ME, const
MemoryLocation &Loc,
return;
if (isa<Argument>(UO)) {
ME |= MemoryEffects::argMemOnly(MR);
+ if (Loc.Size <= LocationSize::precise(sizeof(int)))
+ ME |= MemoryEffects::errnoMemOnly(MR);
----------------
nikic wrote:
This doesn't look right. Even if the argument might alias errno, it's still
argmem from the perspective of this function. The caller has to deal with what
the argument actually points to.
https://github.com/llvm/llvm-project/pull/120783
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