[Bug tree-optimization/99971] GCC generates partially vectorized and scalar code at once

[cvs-commit at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99971

--- Comment #8 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Richard Biener <rgue...@gcc.gnu.org>:

https://gcc.gnu.org/g:700e542971251b11623cce877075567815f72965

commit r12-79-g700e542971251b11623cce877075567815f72965
Author: Richard Biener <rguent...@suse.de>
Date:   Fri Apr 9 09:35:51 2021 +0200

    tree-optimization/99971 - improve BB vect dependence analysis

    We can use TBAA even when we have a DR, do so.  For the testcase
    that means fully vectorizing it instead of only vectorizing
    the first store group resulting in suboptimal code.

    2021-04-09  Richard Biener  <rguent...@suse.de>

            PR tree-optimization/99971
            * tree-vect-data-refs.c (vect_slp_analyze_node_dependences):
            Always use TBAA for loads.

            * g++.dg/vect/slp-pr99971.cc: New testcase.