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Subject: [Bug tree-optimization/102087] [12 Regression] ICE on valid code at
 -O3 on x86_64-linux-gnu: in determine_exit_conditions, at
 tree-ssa-loop-manip.c:1049 since r12-3136-g3673dcf6d6baeb67
Date: Wed, 22 Sep 2021 13:03:56 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D102087

--- Comment #12 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Jiu Fu Guo <guojiufu@gcc.gnu.org>:

https://gcc.gnu.org/g:3087d1b0a2cbe8880ccbbb67744726ff4e5d390e

commit r12-3791-g3087d1b0a2cbe8880ccbbb67744726ff4e5d390e
Author: Jiufu Guo <guojiufu@linux.ibm.com>
Date:   Wed Sep 22 13:20:29 2021 +0800

    Set bound/cmp/control for until wrap loop.

    In patch r12-3136, niter->control, niter->bound and niter->cmp are
    derived from number_of_iterations_lt.  While for 'until wrap condition',
    the calculation in number_of_iterations_lt is not align the requirements
    on the define of them and requirements in determine_exit_conditions.

    This patch calculate niter->control, niter->bound and niter->cmp in
    number_of_iterations_until_wrap.

    gcc/ChangeLog:

    2021-09-22  Jiufu Guo  <guojiufu@linux.ibm.com>

            PR tree-optimization/102087
            * tree-ssa-loop-niter.c (number_of_iterations_until_wrap):
            Update bound/cmp/control for niter.

    gcc/testsuite/ChangeLog:

    2021-09-22  Jiufu Guo  <guojiufu@linux.ibm.com>

            * gcc.dg/pr102087.c: New test.
            PR tree-optimization/102087=