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From: "glisse at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/94804] Failure to elide useless movs in
 128-bit addition
Date: Tue, 28 Apr 2020 17:14:09 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D94804

--- Comment #4 from Marc Glisse <glisse at gcc dot gnu.org> ---
(In reply to Gabriel Ravier from comment #3)
> Having similar problems with useless movs is from the same non
> well-optimized register allocation on function boundaries ?

I don't know, but possibly not. I'll shut up because I am not a RA
specialist...
(and if you expect to see it optimized to bswap64, then obviously it is
unrelated to register allocation)=