--- /dev/null	2017-01-22 10:16:57.869617664 -0800
+++ new/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.replacements/src/org/graalvm/compiler/replacements/ReplacementsUtil.java	2017-02-15 17:09:09.123220666 -0800
@@ -0,0 +1,62 @@
+/*
+ * Copyright (c) 2014, 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.replacements;
+
+import org.graalvm.compiler.core.common.GraalOptions;
+import org.graalvm.compiler.replacements.nodes.AssertionNode;
+
+// JaCoCo Exclude
+public final class ReplacementsUtil {
+    private ReplacementsUtil() {
+        // empty
+    }
+
+    public static final boolean REPLACEMENTS_ASSERTIONS_ENABLED;
+
+    static {
+        boolean assertionsEnabled = false;
+        assert (assertionsEnabled = true) != false;
+        REPLACEMENTS_ASSERTIONS_ENABLED = assertionsEnabled && GraalOptions.ImmutableCode.getValue() == false;
+    }
+
+    /**
+     * Asserts that condition evaluates to true by the time compilation is finished. This is
+     * intended to be used within snippets or stubs, and will lead to a compile error if the
+     * assertion fails.
+     */
+    public static void staticAssert(boolean condition, String message) {
+        if (REPLACEMENTS_ASSERTIONS_ENABLED) {
+            AssertionNode.assertion(true, condition, message);
+        }
+    }
+
+    /**
+     * Asserts that condition evaluates to true at runtime. This is intended to be used within
+     * snippets or stubs, and will lead to a VM error if it fails.
+     */
+    public static void runtimeAssert(boolean condition, String message) {
+        if (REPLACEMENTS_ASSERTIONS_ENABLED) {
+            AssertionNode.assertion(false, condition, message);
+        }
+    }
+}