[Bug target/120888] [16 regression] promotion of unsigned char and short function arguments sign extends them since r16-170-ga670ebde3995

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120888

--- Comment #8 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Max Filippov <jcmvb...@gcc.gnu.org>:

https://gcc.gnu.org/g:2a6ac385076a0d43a529e84e7f7ebcbfc3831437

commit r16-2069-g2a6ac385076a0d43a529e84e7f7ebcbfc3831437
Author: H.J. Lu <hjl.to...@gmail.com>
Date:   Tue Jul 1 04:46:31 2025 +0800

    xtensa: Remove TARGET_PROMOTE_PROTOTYPES

    xtensa ABI requires sign extension of signed 8/16-bit arguments to 32
    bits and zero extension of unsigned 8/16-bit arguments to 32 bits.
    TARGET_PROMOTE_PROTOTYPES is an optimization, not an ABI requirement.
    Remove TARGET_PROMOTE_PROTOTYPES and define xtensa_promote_function_mode
    to properly extend 8/16-bit arguments to 32 bits.

    gcc/

            PR target/120888
            * config/xtensa/xtensa.cc (xtensa_promote_function_mode): New.
            (TARGET_PROMOTE_FUNCTION_MODE): Use.
            (TARGET_PROMOTE_PROTOTYPES): Removed.

    gcc/testsuite/

            PR target/120888
            * gcc.target/xtensa/pr120888-1.c: New test.
            * gcc.target/xtensa/pr120888-2.c: Likewise.

    Signed-off-by: H.J. Lu <hjl.to...@gmail.com>