[Bug tree-optimization/83089] [8 Regression] ICE: Segmentation fault (in instantiate_scev_name)

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83089

--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Nov 22 08:47:47 2017
New Revision: 255044

URL: https://gcc.gnu.org/viewcvs?rev=255044&root=gcc&view=rev
Log:
2017-11-22  Richard Biener  <rguent...@suse.de>

        PR tree-optimization/83089
        * tree-if-conv.c (pass_if_conversion::execute): If anything
        changed reset SCEV and free the number of iteration estimates.

        * gcc.dg/pr83089.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.dg/pr83089.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-if-conv.c