re PR debug/53135 (Duplicates cause size explosion (vta/dwarf))

PR debug/53135
* dwarf2out.c (value_format): Use block4 for dw_val_class_loc
when needed.

From-SVN: r192000

gcc/ChangeLog

 2012-10-02  Alexandre Oliva <aoliva@redhat.com>
 
+	PR debug/53135
+	* dwarf2out.c (value_format): Use block4 for dw_val_class_loc
+	when needed.
+
+2012-10-02  Alexandre Oliva <aoliva@redhat.com>
+
 	PR debug/54177
 	* var-tracking.c (vt_add_function_parameter): Bail if
 	var_lowpart fails.

gcc/dwarf2out.c

@@ -7491,6 +7491,8 @@ value_format (dw_attr_ref a)
 	  return DW_FORM_block1;
 	case 2:
 	  return DW_FORM_block2;
+	case 4:
+	  return DW_FORM_block4;
 	default:
 	  gcc_unreachable ();
 	}