[Bug c/84953] misleading warning from strpbrk(x,"")

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84953

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
DEF_LIB_BUILTIN        (BUILT_IN_STRPBRK, "strpbrk",
BT_FN_STRING_CONST_STRING_CONST_STRING, ATTR_PURE_NOTHROW_NONNULL_LEAF)


DEF_FUNCTION_TYPE_2 (BT_FN_STRING_CONST_STRING_CONST_STRING,
                     BT_STRING, BT_CONST_STRING, BT_CONST_STRING)