[Bug fortran/111837] [11/12/13/14 Regression] Out of bounds access with optimization inside io-implied-do-control

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111837

--- Comment #6 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-12 branch has been updated by Harald Anlauf
<anl...@gcc.gnu.org>:

https://gcc.gnu.org/g:4d4d191e03d102d5afeb4b091e947560351004c3

commit r12-9934-g4d4d191e03d102d5afeb4b091e947560351004c3
Author: Harald Anlauf <anl...@gmx.de>
Date:   Mon Oct 16 21:02:20 2023 +0200

    Fortran: out of bounds access with nested implied-do IO [PR111837]

    gcc/fortran/ChangeLog:

            PR fortran/111837
            * frontend-passes.cc (traverse_io_block): Dependency check of loop
            nest shall be triangular, not banded.

    gcc/testsuite/ChangeLog:

            PR fortran/111837
            * gfortran.dg/implied_do_io_8.f90: New test.

    (cherry picked from commit 5ac63ec5da2e93226457bea4dbb3a4f78d5d82c2)