re PR c++/44561 (using nullptr_t with -flto/-fwhopr causes ICE: tree code 'lang_type' is not supported in gimple streams)

2010-10-14  Richard Guenther  <rguenther@suse.de>

	PR lto/44561
	* tree.def (NULLPTR_TYPE): New tree code.
	* dbxout.c (dbxout_type): Handle NULLPTR_TYPE.
	* dwarf2out.c (is_base_type): Likewise.
	(gen_type_die_with_usage): Likewise.
	* sdbout.c (plain_type_1): Likewise.
	* tree.c (build_int_cst_wide): Likewise.
	* gimple.c (gimple_types_compatible_p_1): NULLPTR_TYPE types
	are equal.

	cp/
	* cp-tree.h (NULLPTR_TYPE_P): Adjust.
	* decl.c (cxx_init_decl_processing): Build a NULLPTR_TYPE node,
	use build_int_cst.
	* error.c (dump_type): Handle NULLPTR_TYPE.
	(dump_type_prefix): Likewise.
	(dump_type_suffix): Likewise.
	* mangle.c (write_type): Likewise.
	* name-lookup.c (arg_assoc_type): Likewise.
	* rtti.c (typeinfo_in_lib_p): Likewise.
	* pt.c (tsubst): Likewise.

	* g++.dg/lto/20101010-3_0.C: New testcase.
	* g++.dg/lto/20101010-4_0.C: Likewise.

From-SVN: r165462