[Bug tree-optimization/91280] [8/9/10 Regression] ICE in get_constraint_for_component_ref, at tree-ssa-structalias.c:3259 since r260354

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91280

--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Jul 31 14:38:21 2019
New Revision: 273936

URL: https://gcc.gnu.org/viewcvs?rev=273936&root=gcc&view=rev
Log:
2019-07-31  Richard Biener  <rguent...@suse.de>

        PR tree-optimization/91280
        * tree-ssa-structalias.c (get_constraint_for_component_ref):
        Decompose MEM_REF manually for offset handling.

        * g++.dg/torture/pr91280.C: New testcase.

Added:
    trunk/gcc/testsuite/g++.dg/torture/pr91280.C
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-structalias.c