--- /dev/null	2017-01-22 10:16:57.869617664 -0800
+++ new/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.graph/src/org/graalvm/compiler/graph/iterators/FilteredNodeIterable.java	2017-02-15 16:58:43.179909519 -0800
@@ -0,0 +1,59 @@
+/*
+ * Copyright (c) 2011, 2016, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package org.graalvm.compiler.graph.iterators;
+
+import java.util.Iterator;
+
+import org.graalvm.compiler.graph.Node;
+
+public class FilteredNodeIterable<T extends Node> implements NodeIterable<T> {
+
+    protected final NodeIterable<T> nodeIterable;
+    protected NodePredicate predicate = NodePredicates.alwaysTrue();
+
+    public FilteredNodeIterable(NodeIterable<T> nodeIterable) {
+        this.nodeIterable = nodeIterable;
+    }
+
+    public FilteredNodeIterable<T> and(NodePredicate nodePredicate) {
+        this.predicate = this.predicate.and(nodePredicate);
+        return this;
+    }
+
+    @Override
+    public Iterator<T> iterator() {
+        return new PredicatedProxyNodeIterator<>(nodeIterable.iterator(), predicate);
+    }
+
+    @SuppressWarnings("unchecked")
+    @Override
+    public <F extends T> FilteredNodeIterable<F> filter(Class<F> clazz) {
+        return (FilteredNodeIterable<F>) this.and(NodePredicates.isA(clazz));
+    }
+
+    @Override
+    public FilteredNodeIterable<T> filter(NodePredicate p) {
+        return this.and(p);
+    }
+
+}