re PR debug/60152 (multiple AT_calling_convention attributes generated after r205679)

	PR debug/60152
	* dwarf2out.c (gen_subprogram_die): Don't call
	add_calling_convention_attribute if subr_die is old_die.

From-SVN: r207770

gcc/ChangeLog

+2014-02-13  Jakub Jelinek  <jakub@redhat.com>
+
+	PR debug/60152
+	* dwarf2out.c (gen_subprogram_die): Don't call
+	add_calling_convention_attribute if subr_die is old_die.
+
 2014-02-13  Sharad Singhai  <singhai@google.com>
 
 	* doc/optinfo.texi: Fix order of nodes.

gcc/dwarf2out.c

@@ -18531,9 +18531,10 @@ gen_subprogram_die (tree decl, dw_die_ref context_die)
       call_site_count = -1;
       tail_call_site_count = -1;
     }
-  /* Add the calling convention attribute if requested.  */
-  add_calling_convention_attribute (subr_die, decl);
 
+  if (subr_die != old_die)
+    /* Add the calling convention attribute if requested.  */
+    add_calling_convention_attribute (subr_die, decl);
 }
 
 /* Returns a hash value for X (which really is a die_struct).  */