[Bug tree-optimization/69728] [6/7 Regression] internal compiler error: in outer_projection_mupa, at graphite-sese-to-poly.c:1175

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69728

--- Comment #23 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Thu Oct 12 14:09:21 2017
New Revision: 253677

URL: https://gcc.gnu.org/viewcvs?rev=253677&root=gcc&view=rev
Log:
2017-10-12  Richard Biener  <rguenther@suse.de>

        PR tree-optimization/69728
        Revert
        2017-09-19  Richard Biener  <rguenther@suse.de>

        PR tree-optimization/69728
        * graphite-sese-to-poly.c (schedule_error): New global.
        (add_loop_schedule): Handle empty domain by failing the
        schedule.
        (build_original_schedule): Handle schedule_error.

        * graphite-sese-to-poly.c (add_loop_schedule): Handle empty
        domain by returning an unchanged schedule.

        * gcc.dg/graphite/pr69728.c: Adjust to reflect we can handle
        the loop now.  Remove unrelated undefined behavior.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/graphite-sese-to-poly.c
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/testsuite/gcc.dg/graphite/pr69728.c