[PATCH] D92808: [ObjC][ARC] Use operand bundle 'clang.arc.attachedcall' instead of explicitly emitting retainRV or claimRV calls in the IR

[Hans Wennborg via Phabricator via llvm-commits]

hans added a comment.

The preprocessed source is attached to this comment: https://bugs.chromium.org/p/chromium/issues/detail?id=1182642#c26

good.s and bad.s are here: https://bugs.chromium.org/p/chromium/issues/detail?id=1182642#c28

And this shows the problematic difference between them: https://bugs.chromium.org/p/chromium/issues/detail?id=1182642#c30

After this change, for some reason x0 is getting clobbered in the prologue.

In https://bugs.chromium.org/p/chromium/issues/detail?id=1182642#c31 I verify that manually changing the register back to x1 fixes the issue.


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