--- old/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.phases/src/org/graalvm/compiler/phases/PhaseSuite.java	2017-07-07 09:31:34.000000000 -0700
+++ new/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.phases/src/org/graalvm/compiler/phases/PhaseSuite.java	2017-07-07 09:31:34.000000000 -0700
@@ -72,6 +72,30 @@
     }
 
     /**
+     * Inserts a phase before the last phase in the suite. If the suite contains no phases the new
+     * phase will be inserted as the first phase.
+     */
+    public final void addBeforeLast(BasePhase<? super C> phase) {
+        ListIterator<BasePhase<? super C>> last = findLastPhase();
+        if (last.hasPrevious()) {
+            last.previous();
+        }
+        last.add(phase);
+    }
+
+    /**
+     * Returns a {@link ListIterator} at the position of the last phase in the suite. If the suite
+     * has no phases then it will return an empty iterator.
+     */
+    private ListIterator<BasePhase<? super C>> findLastPhase() {
+        ListIterator<BasePhase<? super C>> it = phases.listIterator();
+        while (it.hasNext()) {
+            it.next();
+        }
+        return it;
+    }
+
+    /**
      * Returns a {@link ListIterator} at the position of the first phase which is an instance of
      * {@code phaseClass} or null if no such phase can be found.
      *