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Re: [patch] Re: reload vs adds with clobbers

> I still think you need a comment on the addhi3 pattern.  Adding a
> constant zero is non-canonical, so this should never match, and its
> existence is an obvious bug that someone else may validly try to fix by
> removing the Z alternative.  Thus you need a comment to explain why it
> needs to be there.

I checked it in with a suitable comment.  Thanks!
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