* final.c (final_scan_insn): Handle NOTE_INSN_CALL_ARG_LOCATION.
	Call var_location debug hook even on CALL_INSNs.
	(rest_of_clean_state): Don't print NOTE_INSN_CALL_ARG_LOCATION.
	* rtl.def (ENTRY_VALUE): New.
	* dwarf2out.c: Include cfglayout.h.
	(dwarf_stack_op_name, size_of_loc_descr, output_loc_operands,
	output_loc_operands_raw): Handle DW_OP_GNU_entry_value.
	(struct call_arg_loc_node): New type.
	(call_arg_locations, call_arg_loc_last, block_map, call_site_count,
	tail_call_site_count): New variables.
	(dwarf_tag_name): Handle DW_TAG_GNU_call_site and
	DW_TAG_GNU_call_site_parameter.
	(dwarf_attr_name): Handle DW_AT_GNU_call_site_value,
	DW_AT_GNU_call_site_data_value, DW_AT_GNU_call_site_target,
	DW_AT_GNU_call_site_target_clobbered, DW_AT_GNU_tail_call,
	DW_AT_GNU_all_tail_call_sites, DW_AT_GNU_all_call_sites
	and DW_AT_GNU_all_source_call_sites.
	(mem_loc_descriptor): Handle ENTRY_VALUE.
	(add_src_coords_attributes): Don't add enything if
	DECL_SOURCE_LOCATION is UNKNOWN_LOCATION.
	(dwarf2out_abstract_function): Save and clear call_arg_location,
	call_site_count and tail_call_site_count around dwarf2out_decl call.
	(gen_call_site_die): New function.
	(gen_subprogram_die): Emit DW_TAG_GNU_call_site DIEs for call sites.
	(gen_lexical_block_die, gen_inlined_subroutine_die): Update block_map.
	(dwarf2out_function_decl): Clear call_arg_locations,
	call_arg_loc_last, set call_site_count and tail_call_site_count
	to -1 and free block_map.
	(dwarf2out_var_location): Handle NOTE_INSN_CALL_ARG_LOCATION and
	CALL_INSNs.  Add NOTE_DURING_CALL_P var location notes even when not
	followed by any real instructions.
	(dwarf2out_begin_function): Set call_site_count and
	tail_call_site_count to 0.
	(resolve_addr): If DW_AT_abstract_origin of DW_TAG_GNU_call_site
	is dw_val_class_addr, attempt to look it up again, for DECL_EXTERNAL
	attempt to force a DIE for it and worst case remove the attribute.
	(resolve_one_addr): For TREE_CONSTANT_POOL_ADDRESS_P SYMBOL_REFs
	check TREE_ASM_WRITTEN of DECL_INITIAL of the decl instead of
	the decl itself.
	* var-tracking.c: Include tm_p.h.
	(vt_stack_adjustments): For calls call note_register_arguments.
	(argument_reg_set): New variable.
	(add_stores): For MO_VAL_SET of non-tracked regs from argument_reg_set
	ensure the VALUE is resolved.
	(call_arguments): New variable.
	(prepare_call_arguments): New function.
	(add_with_sets): For MO_CALL set u.loc from call_arguments and clear it.
	(struct expand_loc_callback_data): Add ignore_cur_loc field.
	(vt_expand_loc_callback): If ignore_cur_loc, don't look at cur_loc and
	always use the best expression.
	(vt_expand_loc): Add ignore_cur_loc argument.
	(vt_expand_loc_dummy): Clear ignore_cur_loc field.
	(emit_note_insn_var_location): Adjust vt_expand_loc callers.
	(emit_notes_in_bb) <case MO_CALL>: Add NOTE_INSN_CALL_ARG_LOCATION
	note for all calls.
	(vt_add_function_parameter): Use cselib_lookup_from_insn.
	If dv is a VALUE, enter into hash table also ENTRY_VALUE for the
	argument.  Don't call cselib_preserve_only_values and
	cselib_reset_table.
	(note_register_arguments): New function.
	(vt_initialize): Compute argument_reg_set.  Call
	vt_add_function_parameters before processing basic blocks instead of
	afterwards.  For calls call prepare_call_arguments before calling
	cselib_process_insn.
	* print-rtl.c (print_rtx): Handle NOTE_INSN_CALL_ARG_LOCATION.
	* Makefile.in (dwarf2out.o): Depend on $(CFGLAYOUT_H).
	(var-tracking.o): Depend on $(TM_P_H).
	* cfglayout.h (insn_scope): New prototype.
	* gengtype.c (adjust_field_rtx_def): Handle NOTE_INSN_CALL_ARG_LOCATION.
	* cfglayout.c (insn_scope): No longer static.
	* insn-notes.def (CALL_ARG_LOCATION): New.
	* calls.c (expand_call, emit_library_call_value_1): Put USEs for
	MEM arguments into CALL_INSN_FUNCTION_USAGE unconditionally.
	* integrate.c (set_block_origin_self, set_block_abstract_flags): Do
	nothing for DECL_EXTERNAL BLOCK_VARS.
cp/
	* cp-objcp-common.c (cp_function_decl_explicit_p): Don't crash if
	DECL_LANG_SPECIFIC is NULL.
include/
	* dwarf2.h (DW_TAG_GNU_call_site, DW_TAG_GNU_call_site_parameter,
	DW_AT_GNU_call_site_value, DW_AT_GNU_call_site_data_value,
	DW_AT_GNU_call_site_target, DW_AT_GNU_call_site_target_clobbered,
	DW_AT_GNU_tail_call, DW_AT_GNU_all_tail_call_sites,
	DW_AT_GNU_all_call_sites,, DW_AT_GNU_all_source_call_sites,
	DW_OP_GNU_entry_value): New.

From-SVN: r171033