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Subject: [Bug target/100887] [12 Regression] ICE: in
 ix86_expand_vector_init_concat, at config/i386/i386-expand.c:14178 with
 -mavx512f and __builtin_shufflevector()
Date: Fri, 04 Jun 2021 09:20:39 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D100887

--- Comment #8 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Jakub Jelinek <jakub@gcc.gnu.org>:

https://gcc.gnu.org/g:b7dd2e4eeb44bc8678ecde8a6c7401de85e63561

commit r12-1205-gb7dd2e4eeb44bc8678ecde8a6c7401de85e63561
Author: Jakub Jelinek <jakub@redhat.com>
Date:   Fri Jun 4 11:20:02 2021 +0200

    x86: Fix ix86_expand_vector_init for V*TImode [PR100887]

    We have vec_initv4tiv2ti and vec_initv2titi patterns which call
    ix86_expand_vector_init and assume it works for those modes.  For the
    case of construction from two half-sized vectors, the code assumes it
    will always succeed, but we have only insn patterns with SImode and DIm=
ode
    element types.  QImode and HImode element types are already handled
    by performing it with same sized vectors with SImode elements and the
    following patch extends that to V*TImode vectors.

    2021-06-04  Jakub Jelinek  <jakub@redhat.com>

            PR target/100887
            * config/i386/i386-expand.c (ix86_expand_vector_init): Handle
            concatenation from half-sized modes with TImode elements.

            * gcc.target/i386/pr100887.c: New test.=