[Bug fortran/121452] [14/15/16 Regression] Bogus 'OpenMP constructs ... may not be nested inside ‘simd’ region' due to compiler-inserted "#pragma omp __structured_block"

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121452

--- Comment #4 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Paul-Antoine Arras <par...@gcc.gnu.org>:

https://gcc.gnu.org/g:6b90d56d0c352a151efabe06f81d26faeeb9496f

commit r16-4593-g6b90d56d0c352a151efabe06f81d26faeeb9496f
Author: Paul-Antoine Arras <par...@baylibre.com>
Date:   Tue Oct 21 09:48:23 2025 +0200

    OpenMP: Fix bogus diagnostics with intervening code [PR121452]

    The introduction in r14-3488-ga62c8324e7e31a of OMP_STRUCTURED_BLOCK (to
    diagnose invalid intervening code) caused a regression rejecting the valid
use
    of the Fortran CONTINUE statement to end a collapsed loop.
    This patch fixes the incorrect error checking in the OMP lowering pass. It
also
    fixes a check in the Fortran front end that erroneously rejects a similar
    statement in an ordered loop.

    Co-authored by: Tobias Burnus <tbur...@baylibre.com>

            PR fortran/121452

    gcc/fortran/ChangeLog:

            * openmp.cc (resolve_omp_do): Allow CONTINUE as end statement of a
            perfectly nested loop.

    gcc/ChangeLog:

            * omp-low.cc (check_omp_nesting_restrictions): Accept an
            OMP_STRUCTURED_BLOCK in a collapsed simd region and in an ordered
loop.

    gcc/testsuite/ChangeLog:

            * c-c++-common/gomp/pr121452-1.c: New test.
            * c-c++-common/gomp/pr121452-2.c: New test.
            * gfortran.dg/gomp/pr121452-1.f90: New test.
            * gfortran.dg/gomp/pr121452-2.f90: New test.
            * gfortran.dg/gomp/pr121452-3.f90: New test.