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From: "cvs-commit at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/107717] [13 Regression] ICEs expanding
 permutes after g:dc95e1e9702f2f6367bbc108c8d01169be1b66d2
Date: Thu, 17 Nov 2022 08:22:10 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D107717

--- Comment #2 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Tamar Christina <tnfchris@gcc.gnu.org=
>:

https://gcc.gnu.org/g:cbe313060cdcf1d857d42a9e16a1a03e5ff89fff

commit r13-4123-gcbe313060cdcf1d857d42a9e16a1a03e5ff89fff
Author: Tamar Christina <tamar.christina@arm.com>
Date:   Thu Nov 17 08:20:59 2022 +0000

    middle-end: ensure that VEC_PERM operands get lowered to the same SSA_N=
AME.
[PR107717]

    At the moment when the VEC_PERMs generated by this match.pd rule is
generated
    it creates two different SSA_NAMEs for the folded operand.  Because of =
this
it
    the permute switches from a single operand permute to a two operand per=
mute
and
    the target may no longer support a permute for this.

    This fixes it by ensuring we generate the same SSA_NAME for both operan=
ds.

    gcc/ChangeLog:

            PR tree-optimization/107717
            * match.pd: Ensure same SSA_NAME.

    gcc/testsuite/ChangeLog:

            PR tree-optimization/107717
            * gcc.target/aarch64/sve2/pr107717.c: New test.=