[Bug target/86763] [8/9 Regression] Wrong code comparing member of copy of a 237 byte object with nontrivial default constructor on x86-64 arch

[ubizjak at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86763

--- Comment #4 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to Richard Biener from comment #3)
> see how the compare is moved very far away from the branch possibly across
> flag clobbering insns (rep movsq?).  Target sounds good.

No, rep movsq doesn't clobber flags [1].

[1] http://www.felixcloutier.com/x86/MOVS:MOVSB:MOVSW:MOVSD:MOVSQ.html