[Bug tree-optimization/101280] [12 Regression] TSVC s231 slower with -Ofast -march=znver1 since r12-1836-g0ad9d88a3d7170b3

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101280

--- Comment #10 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-9 branch has been updated by Richard Biener
<rguenth@gcc.gnu.org>:

https://gcc.gnu.org/g:5d2771db571323bc7ea25c61b5ed9e5309950f18

commit r9-9772-g5d2771db571323bc7ea25c61b5ed9e5309950f18
Author: Richard Biener <rguenther@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 properly
    guard all dependence checks with DDR_REVERSED_P or its inverse.

    2021-07-07  Richard Biener  <rguenther@suse.de>

            PR tree-optimization/101173
            PR tree-optimization/101280
            * gimple-loop-interchange.cc
            (tree_loop_interchange::valid_data_dependences): Properly
            guard all dependence checks with DDR_REVERSED_P or its
            inverse.

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

    (cherry picked from commit e46ec6e243c704f0858d16af380a7d9c36fc4244)