[Bug tree-optimization/82436] [7/8 Regression] 465.tonto ICE in vect_get_slp_vect_defs, at tree-vect-slp.c:3410

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82436

--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Fri Oct  6 07:03:23 2017
New Revision: 253473

URL: https://gcc.gnu.org/viewcvs?rev=253473&root=gcc&view=rev
Log:
2017-10-06  Richard Biener  <rguenther@suse.de>

        PR tree-optimization/82436
        * tree-vect-slp.c (vect_supported_load_permutation_p): More
        conservatively choose the vectorization factor when checking
        whether we can perform the required load permutation.
        (vect_transform_slp_perm_load): Assert when we may not fail.

        * gcc.dg/vect/pr82436.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.dg/vect/pr82436.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-vect-slp.c