[PATCH][LTO] Fix PR41791

[PATCH][LTO] Fix PR41791

[Richard Guenther]

We were forgetting to stream the system header flag.

Bootstrap & regtest in progress, committing as obvious.

Richard.

2009-10-22  Richard Guenther  <rguenther@suse.de>

	PR lto/41791
	* lto-streamer-out.c (lto_output_location): Stream the
	system header flag.
	* lto-streamer-in.c (lto_input_location): Likewise.

	* g++.dg/lto/20091022-2_0.C: New testcase.

Index: gcc/lto-streamer-out.c
===================================================================
*** gcc/lto-streamer-out.c	(revision 153456)
--- gcc/lto-streamer-out.c	(working copy)
*************** lto_output_location (struct output_block
*** 618,623 ****
--- 618,624 ----
    output_string (ob, ob->main_stream, xloc.file);
    output_sleb128 (ob, xloc.line);
    output_sleb128 (ob, xloc.column);
+   output_sleb128 (ob, xloc.sysp);
  
    ob->current_file = xloc.file;
    ob->current_line = xloc.line;
Index: gcc/lto-streamer-in.c
===================================================================
*** gcc/lto-streamer-in.c	(revision 153456)
--- gcc/lto-streamer-in.c	(working copy)
*************** lto_input_location (struct lto_input_blo
*** 283,295 ****
    xloc.file = canon_file_name (xloc.file);
    xloc.line = lto_input_sleb128 (ib);
    xloc.column = lto_input_sleb128 (ib);
  
    if (data_in->current_file != xloc.file)
      {
        if (data_in->current_file)
  	linemap_add (line_table, LC_LEAVE, false, NULL, 0);
  
!       linemap_add (line_table, LC_ENTER, false, xloc.file, xloc.line);
      }
    else if (data_in->current_line != xloc.line)
      linemap_line_start (line_table, xloc.line, xloc.column);
--- 283,296 ----
    xloc.file = canon_file_name (xloc.file);
    xloc.line = lto_input_sleb128 (ib);
    xloc.column = lto_input_sleb128 (ib);
+   xloc.sysp = lto_input_sleb128 (ib);
  
    if (data_in->current_file != xloc.file)
      {
        if (data_in->current_file)
  	linemap_add (line_table, LC_LEAVE, false, NULL, 0);
  
!       linemap_add (line_table, LC_ENTER, xloc.sysp, xloc.file, xloc.line);
      }
    else if (data_in->current_line != xloc.line)
      linemap_line_start (line_table, xloc.line, xloc.column);
Index: gcc/testsuite/g++.dg/lto/20091022-2_0.C
===================================================================
*** gcc/testsuite/g++.dg/lto/20091022-2_0.C	(revision 0)
--- gcc/testsuite/g++.dg/lto/20091022-2_0.C	(revision 0)
***************
*** 0 ****
--- 1,12 ----
+ // { dg-lto-do link }
+ // { dg-lto-options {{-O3 -flto -Winline}} }
+ 
+ #include <string>
+ 
+ int
+ main()
+ {
+   std::string i;
+   i = "abc";
+ }
+