enable adjustment of return_pc debug attrs

This patch introduces infrastructure for targets to add an offset to
the label issued after the call_insn to set the call_return_pc
attribute.  This will be used on rs6000, that sometimes issues another
instruction after the call proper as part of a call insn.


for  gcc/ChangeLog

	* target.def (call_offset_return_label): New hook.
	* doc/tm.texi.in (TARGET_CALL_OFFSET_RETURN_LABEL): Add
	placeholder.
	* doc/tm.texi: Rebuild.
	* dwarf2out.cc (struct call_arg_loc_node): Record call_insn
	instead of call_arg_loc_note.
	(add_AT_lbl_id): Add optional offset argument.
	(gen_call_site_die): Compute and pass on a return pc offset.
	(gen_subprogram_die): Move call_arg_loc_note computation...
	(dwarf2out_var_location): ... from here.  Set call_insn.

0 files changed, 0 insertions, 0 deletions