https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116896

--- Comment #7 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to Jakub Jelinek from comment #6)
> Though, that setg %cl without xorl %ecx, %ecx first is unlikely to perform
> well, the clearing would be needed.
No, because subb (sbbb) opreates on bytes and no zext to full word is needed.

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