[Bug tree-optimization/101173] [9/10/11/12 Regression] wrong code at -O3 on x86_64-linux-gnu

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101173

--- Comment #7 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:0ad9d88a3d7170b3d864693c9eb512f89a5096ff

commit r12-1836-g0ad9d88a3d7170b3d864693c9eb512f89a5096ff
Author: Richard Biener <rguent...@suse.de>
Date:   Wed Jun 23 09:59:28 2021 +0200

    tree-optimization/101173 - fix interchange dependence checking

    This adjusts the loop interchange dependence checking to disallow
    an outer loop dependence distance of zero.

    2021-06-23  Richard Biener  <rguent...@suse.de>

            PR tree-optimization/101173
            * gimple-loop-interchange.cc
            (tree_loop_interchange::valid_data_dependences): Disallow outer
            loop dependence distance of zero.

            * gcc.dg/torture/pr101173.c: New testcase.