[Bug tree-optimization/92173] [10 Regression] ICE in optab_for_tree_code, at optabs-tree.c:81

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92173

--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Tue Oct 22 13:08:53 2019
New Revision: 277288

URL: https://gcc.gnu.org/viewcvs?rev=277288&root=gcc&view=rev
Log:
2019-10-22  Richard Biener  <rguent...@suse.de>

        PR tree-optimization/92173
        * tree-vect-loop.c (vectorizable_reduction): If
        vect_transform_reduction cannot handle code-generation try without
        the single-def-use-cycle optimization.  Pass optab_vector to
        optab_for_tree_code to get vector shifts as that's what we'd
        generate.

        * gcc.dg/torture/pr92173.c: New testcase.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/testsuite/gcc.dg/vshift-5.c
    trunk/gcc/tree-vect-slp.c
    trunk/gcc/tree-vect-stmts.c