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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/111683] [11/12/13/14 Regression] Incorrect answer
 when using SSE2 intrinsics with -O3 since
 r7-3163-g973625a04b3d9351f2485e37f7d3382af2aed87e
Date: Tue, 12 Mar 2024 02:31:47 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D111683

--- Comment #9 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #8)
> Note with the reduced testcase in comment #7, -fno-tree-vrp has no effect=
 on
> it any more so it might make sense to do another bisection on that testca=
se.

I am suspecting r7-104-gfc9cf6da84a899 exposed the issue now. in GCC 6,
_mm_storeu_pd/_mm_loadu_pd were still builtins, but in GCC 7, they become
directly unaligned loads (starting with r7-104-gfc9cf6da84a899 ).

I suspect if manually change _mm_storeu_pd/_mm_loadu_pd to be similar to wh=
at
GCC 7 had, then we might even up with this failing before GCC 7.=