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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/106910] roundss not vectorized
Date: Tue, 13 Sep 2022 06:31:16 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D106910

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Blocks|                            |53947
                 CC|                            |crazylht at gmail dot com
             Target|x86_64                      |x86_64-*-*

--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Probably missing patterns for V2SFmode here.  Hmm, we don't seem to have any
vector mode patterns here but possibly rely on ix86_builtin_vectorized_func=
tion
which indeed doesn't have any V2SFmode support.

The vectorizer would go the direct internal fn way for those, querying the
floor optab but the x86 backend only has scalar modes supported for the
rounding optabs.

The backend should modernize itself, get rid of the
ix86_builtin_vectorized_function parts for those functions and instead rely
on define_expands with vector modes.


Referenced Bugs:

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D53947
[Bug 53947] [meta-bug] vectorizer missed-optimizations=