--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.microbenchmarks/src/org/graalvm/compiler/microbenchmarks/graal/ConditionalEliminationBenchmark.java	Thu Feb 16 15:46:09 2017 -0800
@@ -0,0 +1,129 @@
+/*
+ * Copyright (c) 2015, 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.microbenchmarks.graal;
+
+import org.openjdk.jmh.annotations.Benchmark;
+import org.openjdk.jmh.annotations.Warmup;
+
+import org.graalvm.compiler.microbenchmarks.graal.util.GraalState;
+import org.graalvm.compiler.microbenchmarks.graal.util.GraphState;
+import org.graalvm.compiler.microbenchmarks.graal.util.MethodSpec;
+import org.graalvm.compiler.phases.common.DominatorConditionalEliminationPhase;
+import org.graalvm.compiler.phases.tiers.PhaseContext;
+
+public class ConditionalEliminationBenchmark extends GraalBenchmark {
+
+    @MethodSpec(declaringClass = ConditionalEliminationBenchmark.class, name = "nullnessSnippet")
+    public static class Nullness extends GraphState {
+    }
+
+    @SuppressWarnings("unused")
+    public static int nullnessSnippet(Object a, Object b) {
+        if (a == null) {
+            if (a == b) {
+                if (b == null) {
+                    return 1;
+                } else {
+                    return -2;
+                }
+            } else {
+                if (b == null) {
+                    return -3;
+                } else {
+                    return 4;
+                }
+            }
+        } else {
+            if (a == b) {
+                if (b == null) {
+                    return -5;
+                } else {
+                    return 6;
+                }
+            } else {
+                if (b == null) {
+                    return 7;
+                } else {
+                    return 8;
+                }
+            }
+        }
+    }
+
+    @Benchmark
+    @Warmup(iterations = 20)
+    public void nullness(Nullness s, GraalState g) {
+        new DominatorConditionalEliminationPhase(false).apply(s.graph, new PhaseContext(g.providers));
+    }
+
+    @MethodSpec(declaringClass = ConditionalEliminationBenchmark.class, name = "searchSnippet")
+    public static class Search extends GraphState {
+    }
+
+    static class Entry {
+        final String name;
+
+        Entry(String name) {
+            this.name = name;
+        }
+    }
+
+    static class EntryWithNext extends Entry {
+        EntryWithNext(String name, Entry next) {
+            super(name);
+            this.next = next;
+        }
+
+        final Entry next;
+    }
+
+    public static Entry searchSnippet(Entry start, String name, Entry alternative) {
+        Entry current = start;
+        do {
+            while (current instanceof EntryWithNext) {
+                if (name != null && current.name == name) {
+                    current = null;
+                } else {
+                    Entry next = ((EntryWithNext) current).next;
+                    current = next;
+                }
+            }
+
+            if (current != null) {
+                if (current.name.equals(name)) {
+                    return current;
+                }
+            }
+            if (current == alternative) {
+                return null;
+            }
+            current = alternative;
+
+        } while (true);
+    }
+
+    @Benchmark
+    public void search(Search s, GraalState g) {
+        new DominatorConditionalEliminationPhase(false).apply(s.graph, new PhaseContext(g.providers));
+    }
+}