[patch] Emit DW_AT_artificial for types

[Eric Botcazou]

Hi,

as permitted by the DWARF-[234] standards, this patch makes the compiler emit 
the DW_AT_artificial attribute for compiler-generated types; there are a lot 
of them in Ada.  GDB doesn't use it (yet), but other debuggers do use it to 
speed up type lookups.

Tested on i586-suse-linux, OK for the mainline?


2011-04-10  Eric Botcazou  <ebotcazou@adacore.com>
            Olivier Hainque  <hainque@adacore.com>
            Nicolas Setton  <setton@adacore.com>

	* tree.h (TYPE_ARTIFICIAL): New flag.
	* dwarf2out.c (modified_type_die): Add a DW_AT_artificial attribute to
	the DIE of the type if it is artificial.
	(gen_array_type_die): Likewise.
	(gen_enumeration_type_die): Likewise.
	(gen_struct_or_union_type_die): Likewise.
ada/
	* gcc-interface/utils.c (record_builtin_type): Set TYPE_ARTIFICIAL on
	the type according to the ARTIFICIAL_P parameter.
	(create_type_decl): Likewise.
	(create_type_stub_decl): Set TYPE_ARTIFICIAL on the type to 1.


2011-04-10  Eric Botcazou  <ebotcazou@adacore.com>

	* gnat.dg/specs/debug1.ads: New test.


-- 
Eric Botcazou
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