[Bug tree-optimization/87645] [7 Regression] gcc hangs up on vr_values::vrp_visit_assignment_or_call

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87645

--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Mon Nov 26 14:16:01 2018
New Revision: 266461

URL: https://gcc.gnu.org/viewcvs?rev=266461&root=gcc&view=rev
Log:
2018-10-19  Richard Biener  <rguenther@suse.de>

        PR middle-end/87645
        Backport from mainline
        2018-07-12  Richard Biener  <rguenther@suse.de>

        * gimple-match-head.c (gimple_resimplify1): Apply recursion
        limit.
        (gimple_resimplify2): Likewise.
        (gimple_resimplify3): Likewise.
        (gimple_resimplify4): Likewise.

        * gcc.dg/torture/pr87645.c: New testcase.

Added:
    branches/gcc-7-branch/gcc/testsuite/gcc.dg/torture/pr87645.c
Modified:
    branches/gcc-7-branch/gcc/ChangeLog
    branches/gcc-7-branch/gcc/gimple-match-head.c
    branches/gcc-7-branch/gcc/testsuite/ChangeLog