re PR debug/56154 (Bad .debug_loc generated for some code)

re PR debug/56154 (Bad .debug_loc generated for some code)

	PR debug/56154
	* dwarf2out.c (dwarf2_debug_hooks): Set end_function hook to
	dwarf2out_end_function.
	(in_first_function_p, maybe_at_text_label_p,
	first_loclabel_num_not_at_text_label): New variables.
	(dwarf2out_var_location): In the first function find out
	lowest loclabel_num N where .LVLN is known not to be equal
	to .Ltext0.
	(find_empty_loc_ranges_at_text_label, dwarf2out_end_function): New
	functions.

	* gcc.dg/guality/pr56154-1.c: New test.
	* gcc.dg/guality/pr56154-2.c: New test.
	* gcc.dg/guality/pr56154-3.c: New test.
	* gcc.dg/guality/pr56154-4.c: New test.
	* gcc.dg/guality/pr56154-aux.c: New file.

From-SVN: r195850