typeck.c (build_modify_expr): Don't always stabilize the lhs and rhs.

        * typeck.c (build_modify_expr): Don't always stabilize the lhs and
        rhs.  Do stabilize the lhs of a MODIFY_EXPR used on the lhs.

From-SVN: r66766

gcc/cp/ChangeLog

+2003-05-13  Jason Merrill  <jason@redhat.com>
+
+	* typeck.c (build_modify_expr): Don't always stabilize the lhs and
+	rhs.  Do stabilize the lhs of a MODIFY_EXPR used on the lhs.
+
 2003-05-11  Kriang Lerdsuwanakij  <lerdsuwa@users.sourceforge.net>
 
 	* method.c (synthesize_method): Call push/pop_deferring_access_checks.

gcc/cp/typeck.c

@@ -5336,6 +5336,10 @@ build_modify_expr (lhs, modifycode, rhs)
 		    TREE_OPERAND (lhs, 0), newrhs);
 
     case MODIFY_EXPR:
+      if (TREE_SIDE_EFFECTS (TREE_OPERAND (lhs, 0)))
+	lhs = build (TREE_CODE (lhs), TREE_TYPE (lhs),
+		     stabilize_reference (TREE_OPERAND (lhs, 0)),
+		     TREE_OPERAND (lhs, 1));
       newrhs = build_modify_expr (TREE_OPERAND (lhs, 0), modifycode, rhs);
       if (newrhs == error_mark_node)
 	return error_mark_node;
@@ -5541,14 +5545,6 @@ build_modify_expr (lhs, modifycode, rhs)
 	}
     }
 
-  if (TREE_CODE (lhstype) != REFERENCE_TYPE)
-    {
-      if (TREE_SIDE_EFFECTS (lhs))
-	lhs = stabilize_reference (lhs);
-      if (TREE_SIDE_EFFECTS (newrhs))
-	newrhs = stabilize_reference (newrhs);
-    }
-
   /* Convert new value to destination type.  */
 
   if (TREE_CODE (lhstype) == ARRAY_TYPE)