--- /dev/null	2016-05-31 09:42:47.975716356 -0700
+++ new/src/jdk.vm.compiler/share/classes/org.graalvm.compiler.hotspot/src/org/graalvm/compiler/hotspot/replacements/AssertionSnippets.java	2016-12-07 13:50:38.041459344 -0800
@@ -0,0 +1,90 @@
+/*
+ * Copyright (c) 2014, 2016, 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.hotspot.replacements;
+
+import static org.graalvm.compiler.replacements.SnippetTemplate.DEFAULT_REPLACER;
+import static org.graalvm.compiler.replacements.nodes.CStringConstant.cstring;
+
+import org.graalvm.compiler.api.replacements.Snippet;
+import org.graalvm.compiler.api.replacements.Snippet.ConstantParameter;
+import org.graalvm.compiler.core.common.spi.ForeignCallDescriptor;
+import org.graalvm.compiler.graph.Node.ConstantNodeParameter;
+import org.graalvm.compiler.graph.Node.NodeIntrinsic;
+import org.graalvm.compiler.hotspot.meta.HotSpotProviders;
+import org.graalvm.compiler.hotspot.nodes.StubStartNode;
+import org.graalvm.compiler.nodes.StructuredGraph;
+import org.graalvm.compiler.nodes.extended.ForeignCallNode;
+import org.graalvm.compiler.nodes.spi.LoweringTool;
+import org.graalvm.compiler.replacements.SnippetTemplate.AbstractTemplates;
+import org.graalvm.compiler.replacements.SnippetTemplate.Arguments;
+import org.graalvm.compiler.replacements.SnippetTemplate.SnippetInfo;
+import org.graalvm.compiler.replacements.Snippets;
+import org.graalvm.compiler.replacements.nodes.AssertionNode;
+import org.graalvm.compiler.word.Word;
+
+import jdk.vm.ci.code.TargetDescription;
+
+public class AssertionSnippets implements Snippets {
+
+    /**
+     * This call can only be used with true for the "vmError" parameter, so that it can be
+     * configured to be a leaf method.
+     */
+    public static final ForeignCallDescriptor ASSERTION_VM_MESSAGE_C = new ForeignCallDescriptor("assertionVmMessageC", void.class, boolean.class, Word.class, long.class, long.class, long.class);
+
+    @Snippet
+    public static void assertion(boolean value, @ConstantParameter String message) {
+        if (!value) {
+            vmMessageC(ASSERTION_VM_MESSAGE_C, true, cstring(message), 0L, 0L, 0L);
+        }
+    }
+
+    @Snippet
+    public static void stubAssertion(boolean value, @ConstantParameter String message) {
+        if (!value) {
+            vmMessageC(ASSERTION_VM_MESSAGE_C, true, cstring(message), 0L, 0L, 0L);
+        }
+    }
+
+    @NodeIntrinsic(ForeignCallNode.class)
+    static native void vmMessageC(@ConstantNodeParameter ForeignCallDescriptor stubPrintfC, boolean vmError, Word format, long v1, long v2, long v3);
+
+    public static class Templates extends AbstractTemplates {
+
+        private final SnippetInfo assertion = snippet(AssertionSnippets.class, "assertion");
+        private final SnippetInfo stubAssertion = snippet(AssertionSnippets.class, "stubAssertion");
+
+        public Templates(HotSpotProviders providers, TargetDescription target) {
+            super(providers, providers.getSnippetReflection(), target);
+        }
+
+        public void lower(AssertionNode assertionNode, LoweringTool tool) {
+            StructuredGraph graph = assertionNode.graph();
+            Arguments args = new Arguments(graph.start() instanceof StubStartNode ? stubAssertion : assertion, graph.getGuardsStage(), tool.getLoweringStage());
+            args.add("value", assertionNode.value());
+            args.addConst("message", "failed runtime assertion in snippet/stub: " + assertionNode.message() + " (" + graph.method() + ")");
+
+            template(args).instantiate(providers.getMetaAccess(), assertionNode, DEFAULT_REPLACER, args);
+        }
+    }
+}