--- /dev/null	2017-01-22 10:16:57.869617664 -0800
+++ new/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.core.test/src/org/graalvm/compiler/core/test/ImplicitNullCheckTest.java	2017-02-15 16:57:37.098025499 -0800
@@ -0,0 +1,86 @@
+/*
+ * Copyright (c) 2011, 2015, 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.core.test;
+
+import org.junit.Assert;
+import org.junit.Ignore;
+import org.junit.Test;
+
+import org.graalvm.compiler.api.directives.GraalDirectives;
+import org.graalvm.compiler.debug.Debug;
+import org.graalvm.compiler.debug.Debug.Scope;
+import org.graalvm.compiler.debug.DebugDumpScope;
+import org.graalvm.compiler.nodes.DeoptimizeNode;
+import org.graalvm.compiler.nodes.StructuredGraph;
+import org.graalvm.compiler.nodes.StructuredGraph.AllowAssumptions;
+import org.graalvm.compiler.nodes.memory.ReadNode;
+import org.graalvm.compiler.nodes.spi.LoweringTool;
+import org.graalvm.compiler.phases.OptimisticOptimizations;
+import org.graalvm.compiler.phases.common.CanonicalizerPhase;
+import org.graalvm.compiler.phases.common.FloatingReadPhase;
+import org.graalvm.compiler.phases.common.GuardLoweringPhase;
+import org.graalvm.compiler.phases.common.LoweringPhase;
+import org.graalvm.compiler.phases.tiers.MidTierContext;
+import org.graalvm.compiler.phases.tiers.PhaseContext;
+
+/**
+ * Tests that the hub access and the null check are folded.
+ */
+public class ImplicitNullCheckTest extends GraphScheduleTest {
+
+    public static final class Receiver {
+
+        public int a;
+    }
+
+    public static int test1Snippet(Object o) {
+        if (GraalDirectives.guardingNonNull(o) instanceof Receiver) {
+            return 42;
+        }
+        return 0;
+    }
+
+    @Ignore("temporarily disable until LoadHub lowering is clarified")
+    @Test
+    public void test1() {
+        test("test1Snippet");
+    }
+
+    @SuppressWarnings("try")
+    private void test(final String snippet) {
+        try (Scope s = Debug.scope("FloatingReadTest", new DebugDumpScope(snippet))) {
+            StructuredGraph graph = parseEager(snippet, AllowAssumptions.YES);
+            PhaseContext context = new PhaseContext(getProviders());
+            new LoweringPhase(new CanonicalizerPhase(), LoweringTool.StandardLoweringStage.HIGH_TIER).apply(graph, context);
+            new FloatingReadPhase().apply(graph);
+            MidTierContext midTierContext = new MidTierContext(getProviders(), getTargetProvider(), OptimisticOptimizations.ALL, graph.getProfilingInfo());
+            new GuardLoweringPhase().apply(graph, midTierContext);
+
+            Assert.assertEquals(0, graph.getNodes(DeoptimizeNode.TYPE).count());
+            Assert.assertTrue(graph.getNodes().filter(ReadNode.class).first().canNullCheck());
+
+        } catch (Throwable e) {
+            throw Debug.handle(e);
+        }
+    }
+}