[Bug c++/107310] [12/13 Regression] "warning: control reaches end of non-void function" with a throw under a trivially-true conditional since r12-5638-ga3e75c1491cd2d50

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107310

--- Comment #5 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The trunk branch has been updated by Jason Merrill <ja...@gcc.gnu.org>:

https://gcc.gnu.org/g:71b33f8fb8daa6a7a359f322b24365d9016438fc

commit r13-6670-g71b33f8fb8daa6a7a359f322b24365d9016438fc
Author: Jason Merrill <ja...@redhat.com>
Date:   Tue Mar 14 12:20:51 2023 -0400

    c++: -Wreturn-type with if (true) throw [PR107310]

    I removed this folding in GCC 12 because it was interfering with an
    experiment of richi's, but that never went in and the change causes
    regressions, so let's put it back.

    This reverts commit r12-5638-ga3e75c1491cd2d.

            PR c++/107310

    gcc/cp/ChangeLog:

            * cp-gimplify.cc (genericize_if_stmt): Restore folding
            of constant conditions.

    gcc/testsuite/ChangeLog:

            * c-c++-common/Wimplicit-fallthrough-39.c: Adjust warning.
            * g++.dg/warn/Wreturn-6.C: New test.