https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116933
--- Comment #17 from Eric Botcazou <ebotcazou at gcc dot gnu.org> --- > Okay, by searching the history, looks like that the following patch forget > to update the above routine when merging the 2nd and 3rd parameters for > __builtin_clear_padding: I see, thanks for investigation! This was overlooked because the C family of compiler do not use the declaration built in common_builtin_nodes, but rather that derived from builtins.def: DEF_GCC_BUILTIN (BUILT_IN_CLEAR_PADDING, "clear_padding", BT_FN_VOID_VAR, ATTR_NOTHROW_NONNULL_TYPEGENERIC_LEAF) which accepts any number of arguments.
