[Bug tree-optimization/98137] Could use SLP to vectorize if split_constant_offset were smarter

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98137

--- Comment #3 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Richard Biener <rguenth@gcc.gnu.org>:

https://gcc.gnu.org/g:7b4ea2827d2003c8ffc76cd478f8974360cbd78f

commit r11-5809-g7b4ea2827d2003c8ffc76cd478f8974360cbd78f
Author: Richard Biener <rguenther@suse.de>
Date:   Fri Dec 4 11:13:48 2020 +0100

    tree-optimization/98137 - enhance split_constant_offset range handling

    split_constant_offset currently gives up looking at ranges when
    dealing with possibly wrapping operations for looking through
    conversions when the downstream analysis does not yield a SSA name.
    That's overly conservative and we have a nice helper that can
    deal with arbitrary expresssions.  Use that.  This helps data
    reference group analysis so the testcase is fully SLP vectorized,
    making use of the whole-function "BB" vectorization capabilities
    we now have.

    2020-12-04  Richard Biener  <rguenther@suse.de>

            PR tree-optimization/98137
            * tree-data-ref.c (split_constant_offset_1): Use
            determine_value_range instead of get_range_info to handle
            arbitrary expressions.

            * gcc.dg/vect/bb-slp-pr98137.c: New testcase.