rjmccall added inline comments.
================
Comment at: lib/Sema/SemaInit.cpp:6681
// full-expression's cleanups.
- if ((S.getLangOpts().ObjCAutoRefCount &&
- MTE->getType()->isObjCLifetimeType()) ||
+ if (MTE->getType()->isNonTrivialObjCLifetimeType() ||
(MTE->getStorageDuration() == SD_Automatic &&
----------------
Oh, I see what's happening here. The special case for ARC is actually wholly
unnecessary. The code's been written as if MTE->getType() for an ARC temporary
will just have type "id". In fact, it'll have a lifetime-qualified type,
dependent on the type of the reference which has been bound to it. So we need
to mark that there's a temporary cleanup if the type has non-trivial lifetime,
i.e. if MTE->getType().hasNonTrivialObjCLifetime(); but this is already
considered as part of MTE->getType().isDestructedType(), and the
storage-duration condition there is correct as well. So really we should just
delete this entire clause.
That should eliminate the need for Type::isNonTrivialObjCLifetimeType(). In
general, we don't want methods like that to ever exist: lifetime is determined
by qualifiers, and querying a Type instead of a QualType has the potential to
implicitly remove qualifiers.
https://reviews.llvm.org/D31007
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