* function.h (struct emit_status): Remove x_last_linenum,
	x_last_filename. Add x_last_location.
	* rtl.h: #include "input.h".
	(NOTE_DATA): New.
	* cfglayout.c (duplicate_insn_chain): Use emit_line_note for line
	number notes.
	* emit-rtl.c (last_linenum, last_filename): Remove.
	(last_location): New.
	(emit_line_note_after): LINE must always be >= 0.
	(emit_line_note): Likewise. Check not duplicate here...
	(emit_note): ... rather than here.
	(emit_line_note_force, force_next_line_note, init_emit): Adjust.
	* integrate.c (expand_inline_function): Use emit_line_note for
	line number notes.
	(copy_insn_list): Likewise.
	* unroll.c (copy_loop_body): Likewise.
	* Makefile.in (RTL_H): Add input.h.

From-SVN: r68002