[Bug c/92324] [10 Regression] ICE in expand_direct_optab_fn, at internal-fn.c:2890

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92324

--- Comment #8 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Fri Nov 15 12:48:34 2019
New Revision: 278289

URL: https://gcc.gnu.org/viewcvs?rev=278289&root=gcc&view=rev
Log:
2019-11-15  Richard Biener  <rguent...@suse.de>

        PR tree-optimization/92324
        * tree-vect-loop.c (vect_create_epilog_for_reduction): Fix
        singedness of SLP reduction epilouge operations.  Also reduce
        the vector width for SLP reductions before doing elementwise
        operations if possible.

        * gcc.dg/vect/pr92324-4.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.dg/vect/pr92324-4.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-vect-loop.c