[Bug tree-optimization/71824] [6/7 Regression] ICE when compiling libiberty with Graphite loop optimizations

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71824

--- Comment #11 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Feb  1 08:02:50 2017
New Revision: 245081

URL: https://gcc.gnu.org/viewcvs?rev=245081&root=gcc&view=rev
Log:
2017-02-01  Richard Biener  <rguent...@suse.de>

        PR tree-optimization/71824
        * graphite-scop-detection.c (scop_detection::build_scop_breadth):
        Verify the loops are valid in the merged SESE region.
        (scop_detection::can_represent_loop_1): Check analyzing the
        evolution of the number of iterations in the region succeeds.

        * gcc.dg/graphite/pr71824.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.dg/graphite/pr71824.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/graphite-scop-detection.c
    trunk/gcc/testsuite/ChangeLog