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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/113237] [14 Regression] ICE verify_ssa failed
 when building 500.perlbench_r since r14-6822-g01f4251b8775c8
Date: Fri, 12 Jan 2024 15:32:45 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D113237

--- Comment #5 from GCC 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:99c0a540d6689ede068f9ba98af6f38c3cd71362

commit r14-7196-g99c0a540d6689ede068f9ba98af6f38c3cd71362
Author: Tamar Christina <tamar.christina@arm.com>
Date:   Fri Jan 12 15:25:58 2024 +0000

    middle-end: thread through existing LCSSA variable for alternative exits
too [PR113237]

    Builing on top of the previous patch, similar to when we have a single =
exit
if
    we have a case where all exits are considered early exits and there are
existing
    non virtual phi then in order to maintain LCSSA we have to use the exis=
ting
PHI
    variables.  We can't simply clear them and just rebuild them because the
order
    of the PHIs in the main exit must match the original exit for when we a=
dd
the
    skip_epilog guard.

    But the infrastructure is already in place to maintain them, we just ha=
ve
to use
    the right value.

    gcc/ChangeLog:

            PR tree-optimization/113237
            * tree-vect-loop-manip.cc (slpeel_tree_duplicate_loop_to_edge_c=
fg):
Use
            existing LCSSA variable for exit when all exits are early break.

    gcc/testsuite/ChangeLog:

            PR tree-optimization/113237
            * gcc.dg/vect/vect-early-break_98-pr113237.c: New test.=