dwarf2out.c (dwarf2out_define, [...]): Treat lineno 1 the same as lineno 0…

dwarf2out.c (dwarf2out_define, [...]): Treat lineno 1 the same as lineno 0 before first start file directive.

	* dwarf2out.c (dwarf2out_define, dwarf2out_undef): Treat
	lineno 1 the same as lineno 0 before first start file directive.
	(optimize_macinfo_range): Likewise.

From-SVN: r187475

gcc/ChangeLog

 2012-05-14  Jakub Jelinek  <jakub@redhat.com>
 
+	* dwarf2out.c (dwarf2out_define, dwarf2out_undef): Treat
+	lineno 1 the same as lineno 0 before first start file directive.
+	(optimize_macinfo_range): Likewise.
+
 	* dwarf2out.c (have_macinfo): Define.
 	(dwarf2out_finish): Don't emit DW_AT_GNU_macros or DW_AT_macro_info
 	attribute, don't force empty compilation unit and don't emit any

gcc/dwarf2out.c

@@ -20110,7 +20110,7 @@ dwarf2out_define (unsigned int lineno ATTRIBUTE_UNUSED,
       macinfo_entry e;
       /* Insert a dummy first entry to be able to optimize the whole
 	 predefined macro block using DW_MACRO_GNU_transparent_include.  */
-      if (VEC_empty (macinfo_entry, macinfo_table) && lineno == 0)
+      if (VEC_empty (macinfo_entry, macinfo_table) && lineno <= 1)
 	{
 	  e.code = 0;
 	  e.lineno = 0;
@@ -20137,7 +20137,7 @@ dwarf2out_undef (unsigned int lineno ATTRIBUTE_UNUSED,
       macinfo_entry e;
       /* Insert a dummy first entry to be able to optimize the whole
 	 predefined macro block using DW_MACRO_GNU_transparent_include.  */
-      if (VEC_empty (macinfo_entry, macinfo_table) && lineno == 0)
+      if (VEC_empty (macinfo_entry, macinfo_table) && lineno <= 1)
 	{
 	  e.code = 0;
 	  e.lineno = 0;
@@ -20276,13 +20276,13 @@ optimize_macinfo_range (unsigned int idx, VEC (macinfo_entry, gc) *files,
 
   /* Optimize only if there are at least two consecutive define/undef ops,
      and either all of them are before first DW_MACINFO_start_file
-     with lineno 0 (i.e. predefined macro block), or all of them are
+     with lineno {0,1} (i.e. predefined macro block), or all of them are
      in some included header file.  */
   if (second->code != DW_MACINFO_define && second->code != DW_MACINFO_undef)
     return 0;
   if (VEC_empty (macinfo_entry, files))
     {
-      if (first->lineno != 0 || second->lineno != 0)
+      if (first->lineno > 1 || second->lineno > 1)
 	return 0;
     }
   else if (first->lineno == 0)
@@ -20295,7 +20295,7 @@ optimize_macinfo_range (unsigned int idx, VEC (macinfo_entry, gc) *files,
   for (i = idx; VEC_iterate (macinfo_entry, macinfo_table, i, cur); i++)
     if (cur->code != DW_MACINFO_define && cur->code != DW_MACINFO_undef)
       break;
-    else if (first->lineno == 0 && cur->lineno != 0)
+    else if (VEC_empty (macinfo_entry, files) && cur->lineno > 1)
       break;
     else
       {
@@ -20309,7 +20309,7 @@ optimize_macinfo_range (unsigned int idx, VEC (macinfo_entry, gc) *files,
 
   /* From the containing include filename (if any) pick up just
      usable characters from its basename.  */
-  if (first->lineno == 0)
+  if (VEC_empty (macinfo_entry, files))
     base = "";
   else
     base = lbasename (VEC_last (macinfo_entry, files)->info);