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Subject: [Bug tree-optimization/100349] [11/12 Regression] ICE Segmentation
 fault during GIMPLE pass: evrp (under -O2 to -Os)
Date: Mon, 17 May 2021 16:19:51 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D100349

--- Comment #5 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Aldy Hernandez <aldyh@gcc.gnu.org>:

https://gcc.gnu.org/g:ce81282261c6c77883b17d0ebfbbe337bed76457

commit r12-842-gce81282261c6c77883b17d0ebfbbe337bed76457
Author: Aldy Hernandez <aldyh@redhat.com>
Date:   Thu May 13 16:09:58 2021 -0400

    Bail in bounds_of_var_in_loop if scev returns NULL.

    Both initial_condition_in_loop_num and evolution_part_in_loop_num
    can return NULL.  This patch exits if either one is NULL.  Presumably
    this didn't happen before, because adjust_range_with_scev was called
    far less frequently than in ranger, which can call it for every PHI.

    gcc/ChangeLog:

            PR tree-optimization/100349
            * vr-values.c (bounds_of_var_in_loop): Bail if scev returns
              NULL.

    gcc/testsuite/ChangeLog:

            * gcc.dg/pr100349.c: New test.=