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Subject: [Bug target/104946] [12 regression] Suboptimal gimple foding for
 blendvpd under sse4.1
Date: Wed, 16 Mar 2022 08:57:04 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D104946

--- Comment #2 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by hongtao Liu <liuhongt@gcc.gnu.org>:

https://gcc.gnu.org/g:570d5bff9af537265a3e0935140786e5fdf51de1

commit r12-7662-g570d5bff9af537265a3e0935140786e5fdf51de1
Author: liuhongt <hongtao.liu@intel.com>
Date:   Wed Mar 16 15:59:57 2022 +0800

    Don't fold __builtin_ia32_blendvpd w/o sse4.2.

    __builtin_ia32_blendvpd is defined under sse4.1 and gimple folded
    to ((v2di) c) < 0 ? b : a where vec_cmpv2di is under sse4.2 w/o which
    it's veclowered to scalar operations and not combined back in rtl.

    gcc/ChangeLog:

            PR target/104946
            * config/i386/i386-builtin.def (BDESC): Add
            CODE_FOR_sse4_1_blendvpd for IX86_BUILTIN_BLENDVPD.
            * config/i386/i386.cc (ix86_gimple_fold_builtin): Don't fold
            __builtin_ia32_blendvpd w/o sse4.2

    gcc/testsuite/ChangeLog:

            * gcc.target/i386/sse4_1-blendvpd-1.c: New test.=