--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/com.oracle.graal.compiler.test/src/com/oracle/graal/compiler/test/ImplicitNullCheckTest.java	Sun Jun 07 16:21:00 2015 +0200
@@ -0,0 +1,76 @@
+/*
+ * 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 com.oracle.graal.compiler.test;
+
+import org.junit.*;
+
+import com.oracle.graal.api.directives.*;
+import com.oracle.graal.nodes.*;
+import com.oracle.graal.nodes.StructuredGraph.AllowAssumptions;
+import com.oracle.graal.nodes.memory.*;
+import com.oracle.graal.nodes.spi.*;
+import com.oracle.graal.phases.*;
+import com.oracle.graal.phases.common.*;
+import com.oracle.graal.phases.tiers.*;
+import com.oracle.jvmci.debug.*;
+import com.oracle.jvmci.debug.Debug.Scope;
+
+/**
+ * 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;
+    }
+
+    @Test
+    public void test1() {
+        test("test1Snippet");
+    }
+
+    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(), getCodeCache().getTarget(), OptimisticOptimizations.ALL, graph.method().getProfilingInfo(), null);
+            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);
+        }
+    }
+}