* tree.c (real_value_from_int_cst): Clear REAL_VALUE_TYPE object first.

From-SVN: r31038

gcc/ChangeLog

 Mon Dec 20 15:00:04 1999  Richard Kenner  <kenner@vlsi1.ultra.nyu.edu>
 
+	* tree.c (real_value_from_int_cst): Clear REAL_VALUE_TYPE object first.
+
 	* expr.c (store_constructor): New argument SIZE; pass to clear_storage.
 	(store_constructor_field, expand_expr): Pass new arg.
 

gcc/tree.c

@@ -1425,6 +1425,10 @@ real_value_from_int_cst (type, i)
   REAL_VALUE_TYPE d;
 
 #ifdef REAL_ARITHMETIC
+  /* Clear all bits of the real value type so that we can later do
+     bitwise comparisons to see if two values are the same.  */
+  bzero ((char *) &d, sizeof d);
+
   if (! TREE_UNSIGNED (TREE_TYPE (i)))
     REAL_VALUE_FROM_INT (d, TREE_INT_CST_LOW (i), TREE_INT_CST_HIGH (i),
 			 TYPE_MODE (type));