[Bug tree-optimization/81529] [8 Regression] ICE in vectorizable_induction, at tree-vect-loop.c:6613

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81529

--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Tue Jul 25 13:22:31 2017
New Revision: 250517

URL: https://gcc.gnu.org/viewcvs?rev=250517&root=gcc&view=rev
Log:
2017-07-25  Richard Biener  <rguent...@suse.de>

        PR tree-optimization/81529
        * tree-vect-stmts.c (process_use): Disregard live induction PHIs
        when optimizing backedge uses.

        * gfortran.dg/pr81529.f90: New testcase.

Added:
    trunk/gcc/testsuite/gfortran.dg/pr81529.f90
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-vect-stmts.c