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From: "ubizjak at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/114487] ICE when building libsdl2 on -mfpmath=sse x86
 with LTO
Date: Wed, 27 Mar 2024 09:35:52 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D114487

--- Comment #4 from Uro=C5=A1 Bizjak <ubizjak at gmail dot com> ---
(In reply to Uro=C5=A1 Bizjak from comment #3)
> (In reply to Uro=C5=A1 Bizjak from comment #2)
> > Adding -msse to the second compilation works OK, removing -mfpmath=3Dss=
e from
> > the first compilation also works OK.
>=20
> Which makes this PR a LTO reincarnation of PR66047.

Please see the FIXME in ix86_function_sseregparm:

          /* Refuse to produce wrong code when local function with SSE enab=
led
             is called from SSE disabled function.
             FIXME: We need a way to detect these cases cross-ltrans partit=
ion
             and avoid using SSE calling conventions on local functions cal=
led
             from function with SSE disabled.  For now at least delay the
             warning until we know we are going to produce wrong code.
             See PR66047  */=