[Bug tree-optimization/78224] [5/6/7 Regression] g++ ICE at -O2(-O1 on gcc6) and above in verify_loop_structure, at cfgloop.c:1646

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78224

--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Tue Nov  8 08:03:54 2016
New Revision: 241955

URL: https://gcc.gnu.org/viewcvs?rev=241955&root=gcc&view=rev
Log:
2016-11-08  Richard Biener  <rguenther@suse.de>

        PR tree-optimization/78224
        * tree-call-cdce.c (shrink_wrap_one_built_in_call_with_conds):
        Split the fallthru edge in case its successor may have PHIs.
        Do not free dominance info.

        * g++.dg/torture/pr78224.C: New testcase.

Added:
    trunk/gcc/testsuite/g++.dg/torture/pr78224.C
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-call-cdce.c