* builtins.def: Encode additional information, such as names and
	types, here.
	* builtin-types.def: New file.
	* builtins.c (built_in_names): Adjust use of DEF_BUILTIN.
	(built_in_decls): Likewise.  Don't explicitly initialize global
	data to NULL.
	(expand_builtin_mathfn): Handle float and long double variants of
	math builtins.
	(expand_builtin): Likewise.
	* c-common.c (c_common_nodes_and_builtins): Make it table-driven.
	(expand_tree_builtin): Handle long, long long, float, and long
	double variants of math functions.
	* c-common.h (c_tree_index): Remove some unused nodes.
	(void_ftype): Remove.
	(void_type_ptr): Likewise.
	(int_ftype_int): Likewise.
	(ptr_ftype_sizetype): Likewise.
	* c-decl.c (init_decl_processing): Remove creation of DWARF
	builtins.
	* defaults.h (MD_INIT_BUILTINS): Provide default definition.
	* tree.h (built_in_function): Adjust definition of DEF_BUILTIN.
	* Makefile.in (c-common.o): Depend on builtin-types.def.

	* decl.c (init_decl_processing): Tweak.

From-SVN: r42583