[Bug tree-optimization/80876] [8 Regression] ICE in verify_loop_structure, at cfgloop.c:1644 (error: loop 1's latch does not have an edge to its header)

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80876

--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Tue May 30 07:49:00 2017
New Revision: 248633

URL: https://gcc.gnu.org/viewcvs?rev=248633&root=gcc&view=rev
Log:
2017-05-30  Richard Biener  <rguent...@suse.de>

        PR middle-end/80876
        * cfgexpand.c (expand_gimple_cond): Fixup preserving loops again.

        * gcc.dg/torture/pr80876.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.dg/torture/pr80876.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/cfgexpand.c
    trunk/gcc/testsuite/ChangeLog