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From: "matz at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/96373] SVE miscompilation on vectorized division loop,
 leading to FP exception
Date: Tue, 04 Aug 2020 14:38:00 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D96373

--- Comment #3 from Michael Matz <matz at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #2)
> which means for non-memory gimple_could_trap_p (stmt) - sth you can
> easily check I guess.

Just note that _all_ floating point operations, not just divisions, can trap
(without fast-math).  You never know if the user enabled stops for any of t=
he
FP exceptions (overflow, underflow, inexact, invalid op, div-by-zero).  So,=
 on
SVE that means all FP operations need to use the loop mask.

(Of course enabling stops for something like inexact/xflow is silly, so pun=
ting
on that might be fine)=