--- /dev/null	2016-05-31 09:42:47.975716356 -0700
+++ new/src/jdk.vm.compiler/share/classes/org.graalvm.compiler.api.directives.test/src/org/graalvm/compiler/api/directives/test/ProbabilityDirectiveTest.java	2016-12-09 00:46:40.181858977 -0800
@@ -0,0 +1,63 @@
+/*
+ * 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.api.directives.test;
+
+import org.junit.Assert;
+import org.junit.Test;
+
+import org.graalvm.compiler.api.directives.GraalDirectives;
+import org.graalvm.compiler.core.test.GraalCompilerTest;
+import org.graalvm.compiler.graph.iterators.NodeIterable;
+import org.graalvm.compiler.nodes.AbstractBeginNode;
+import org.graalvm.compiler.nodes.IfNode;
+import org.graalvm.compiler.nodes.StructuredGraph;
+
+public class ProbabilityDirectiveTest extends GraalCompilerTest {
+
+    public static int branchProbabilitySnippet(int arg) {
+        if (GraalDirectives.injectBranchProbability(0.125, arg > 0)) {
+            GraalDirectives.controlFlowAnchor(); // prevent removal of the if
+            return 1;
+        } else {
+            GraalDirectives.controlFlowAnchor(); // prevent removal of the if
+            return 2;
+        }
+    }
+
+    @Test
+    public void testBranchProbability() {
+        test("branchProbabilitySnippet", 5);
+    }
+
+    @Override
+    protected boolean checkLowTierGraph(StructuredGraph graph) {
+        NodeIterable<IfNode> ifNodes = graph.getNodes(IfNode.TYPE);
+        Assert.assertEquals("IfNode count", 1, ifNodes.count());
+
+        IfNode ifNode = ifNodes.first();
+        AbstractBeginNode trueSuccessor = ifNode.trueSuccessor();
+        Assert.assertEquals("branch probability of " + ifNode, 0.125, ifNode.probability(trueSuccessor), 0);
+
+        return true;
+    }
+}