https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117618
--- Comment #2 from GCC Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Hans-Peter Nilsson <h...@gcc.gnu.org>: https://gcc.gnu.org/g:8a4e57e6bc63eba78e5f3b0090e58d48a95dcbc7 commit r15-6463-g8a4e57e6bc63eba78e5f3b0090e58d48a95dcbc7 Author: Hans-Peter Nilsson <h...@bitrange.com> Date: Sun Dec 29 08:14:14 2024 +0100 MMIX: Correct handling of C23 (...) functions, PR117618 This commit fixes a MMIX C23 (...)-handling bug; failing gcc.dg/c23-stdarg-[46789].c execution tests. But, this isn't about a missing "|| arg.type != NULL_TREE" in the PORT_setup_incoming_varargs function like most other PR114175 port bugs exposed by the gcc.dg/c23-stdarg-6.c .. -9.c tests; the MMIX port passes struct-return-values in a register. But, the bug is somewhat similar. This bug seems like it was added already in r13-3549-g4fe34cdcc80ac2, by incorrectly handling TYPE_NO_NAMED_ARGS_STDARG_P-functions ((...)-functions); counting them as having one parameter instead of none. That "+ 1" below is a kind-of hidden function_arg_advance call, which shouldn't happen for (...)-functions. PR target/117618 * config/mmix/mmix.cc (mmix_setup_incoming_varargs): Correct handling of C23 (...)-functions.
