[patch] Fix PR ada/35998

[Eric Botcazou]

Hi,

this is an old bug report from Jan, which was closed, then reopened by Tom at 
some point, but the patch never got reviewed.  The original submission is at:
  http://gcc.gnu.org/ml/gcc-patches/2008-05/msg01857.html

Tested on x86_64-suse-linux, OK for the mainline?


2013-11-11  Jan Kratochvil  <jan.kratoch...@redhat.com>

        PR ada/35998
        * dwarf2out.c (add_byte_size_attribute): Omit attribute for size -1.


-- 
Eric Botcazou
Index: dwarf2out.c
===================================================================
--- dwarf2out.c	(revision 204444)
+++ dwarf2out.c	(working copy)
@@ -16355,9 +16355,10 @@ add_byte_size_attribute (dw_die_ref die,
 
   /* Note that `size' might be -1 when we get to this point.  If it is, that
      indicates that the byte size of the entity in question is variable.  We
-     have no good way of expressing this fact in Dwarf at the present time,
-     so just let the -1 pass on through.  */
-  add_AT_unsigned (die, DW_AT_byte_size, size);
+     have no good way of expressing this fact in Dwarf at the present time
+     when location description was not used by the caller code instead.  */
+  if (size != (unsigned) -1)
+    add_AT_unsigned (die, DW_AT_byte_size, size);
 }
 
 /* For a FIELD_DECL node which represents a bit-field, output an attribute