[Bug tree-optimization/94969] [8/9/10/11 Regression] Invalid loop distribution since r8-2390-gdfbddbeb1ca912c9

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94969

--- Comment #9 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Bin Cheng <amker@gcc.gnu.org>:

https://gcc.gnu.org/g:f6e1a4cd83190746b6544917f7526fa480ca5f18

commit r11-345-gf6e1a4cd83190746b6544917f7526fa480ca5f18
Author: Bin Cheng <bin.cheng@linux.alibaba.com>
Date:   Wed May 13 11:37:47 2020 +0800

    Add missing unit dependence vector in data dependence analysis

    Current data dependence analysis misses unit distant vector if DRs in
    DDR have the same invariant access functions.  This adds the vector as
    the constant access function case.

    2020-05-13  Bin Cheng  <bin.cheng@linux.alibaba.com>
    PR tree-optimization/94969

    gcc/
        * tree-data-dependence.c (constant_access_functions): Rename to...
        (invariant_access_functions): ...this.  Add parameter.  Check for
        invariant access function, rather than constant.
        (build_classic_dist_vector): Call above function.
        * tree-loop-distribution.c (pg_add_dependence_edges): Add comment.

    gcc/testsuite/
        * gcc.dg/tree-ssa/pr94969.c: New test.