[Bug modula2/109952] Inconsistent HIGH values with 'ARRAY OF CHAR'

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109952

--- Comment #2 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Gaius Mulley <gaius@gcc.gnu.org>:

https://gcc.gnu.org/g:b4df098647b687ca4e43952ec4a198b2816732ba

commit r14-1158-gb4df098647b687ca4e43952ec4a198b2816732ba
Author: Gaius Mulley <gaiusmod2@gmail.com>
Date:   Wed May 24 11:14:07 2023 +0100

    PR modula2/109952 Inconsistent HIGH values with 'ARRAY OF CHAR'

    This patch fixes the case when a single character constant literal is
    passed as a string actual parameter to an ARRAY OF CHAR formal parameter.
    To be consistent a single character is promoted to a string and nul
    terminated (and its high value is 1).  Previously a single character
    string would not be nul terminated and the high value was 0.
    The documentation now includes a section describing the expected behavior
    and included in this patch is some regression test code matching the
    table inside the documentation.

    gcc/ChangeLog:

            PR modula2/109952
            * doc/gm2.texi (High procedure function): New node.
            (Using): New menu entry for High procedure function.

    gcc/m2/ChangeLog:

            PR modula2/109952
            * Make-maintainer.in: Change header to include emacs file mode.
            * gm2-compiler/M2GenGCC.mod (BuildHighFromChar): Check whether
            operand is a constant string and is nul terminated then return one.
            * gm2-compiler/PCSymBuild.mod (WalkFunction): Add default return
            TRUE.  Static analysis missing return path fix.
            * gm2-libs/IO.mod (Init): Rewrite to help static analysis.
            * target-independent/m2/gm2-libs.texi: Rebuild.

    gcc/testsuite/ChangeLog:

            PR modula2/109952
            * gm2/pim/run/pass/hightests.mod: New test.

    Signed-off-by: Gaius Mulley <gaiusmod2@gmail.com>