PR pch/53880
	* gengtype.c (struct walk_type_data): Add have_this_obj field.
	(walk_type): For functions that take a this_obj argument and
	that process fields with a GTY((length)) argument, write the
	test that write_types_local_process_field will write also at the
	head of the loop, effectively unswitching the loop.
	(write_func_for_structure, write_local_func_for_structure): Clear
	have_this_obj before calling walk_type.
	(write_local_func_for_structure): Set have_this_obj before walk_type.
	(write_array): Set have_this_obj for output of local pointer walking
	functions but not for marker functions.
	(write_types_local_process_field): Assert have_this_obj is set.

	* rtl.h (simplify_using_condition): Adjust prototype using bitmap
	from coretypes.h.

From-SVN: r189999