[Bug tree-optimization/81418] [8 Regression] ICE in vect_get_vec_def_for_stmt_copy

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81418

--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Tue Jul 18 07:26:04 2017
New Revision: 250296

URL: https://gcc.gnu.org/viewcvs?rev=250296&root=gcc&view=rev
Log:
2017-06-18  Richard Biener  <rguenther@suse.de>

        PR tree-optimization/81418
        * tree-vect-loop.c (vectorizable_reduction): Properly compute
        vectype_in.  Verify that with lane-reducing reduction operations
        we have a single def-use cycle.

        * gcc.dg/torture/pr81418.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.dg/torture/pr81418.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-vect-loop.c