--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/truffle/com.oracle.truffle.api.dsl.test/src/com/oracle/truffle/api/dsl/test/SpecializationGroupingTest.java	Wed Jun 17 10:58:08 2015 +0200
@@ -0,0 +1,119 @@
+/*
+ * Copyright (c) 2012, 2012, 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.truffle.api.dsl.test;
+
+import org.junit.*;
+
+import com.oracle.truffle.api.*;
+import com.oracle.truffle.api.dsl.*;
+import com.oracle.truffle.api.dsl.test.SpecializationGroupingTestFactory.TestElseConnectionBug1Factory;
+import com.oracle.truffle.api.dsl.test.SpecializationGroupingTestFactory.TestElseConnectionBug2Factory;
+import com.oracle.truffle.api.dsl.test.TypeSystemTest.ValueNode;
+import com.oracle.truffle.api.frame.*;
+import com.oracle.truffle.api.nodes.*;
+
+/**
+ * Tests execution counts of guards. While we do not make guarantees for guard invocation except for
+ * their execution order our implementation reduces the calls to guards as much as possible for the
+ * generic case.
+ */
+public class SpecializationGroupingTest {
+
+    @Test
+    public void testElseConnectionBug1() {
+        CallTarget target = TestHelper.createCallTarget(TestElseConnectionBug1Factory.create(new GenericInt()));
+        Assert.assertEquals(42, target.call());
+    }
+
+    @SuppressWarnings("unused")
+    @NodeChild(value = "genericChild", type = GenericInt.class)
+    public abstract static class TestElseConnectionBug1 extends ValueNode {
+
+        @Specialization(rewriteOn = {SlowPathException.class}, guards = "isInitialized(value)")
+        public int do1(int value) throws SlowPathException {
+            throw new SlowPathException();
+        }
+
+        @Specialization(contains = "do1", guards = "isInitialized(value)")
+        public int do2(int value) {
+            return value == 42 ? value : 0;
+        }
+
+        @Specialization(guards = "!isInitialized(value)")
+        public Object do3(int value) {
+            throw new AssertionError();
+        }
+
+        boolean isInitialized(int value) {
+            return true;
+        }
+    }
+
+    public static final class GenericInt extends ValueNode {
+
+        @Override
+        public Object execute(VirtualFrame frame) {
+            return executeInt(frame);
+        }
+
+        @Override
+        public int executeInt(VirtualFrame frame) {
+            return 42;
+        }
+
+    }
+
+    @Test
+    public void testElseConnectionBug2() {
+        TestHelper.assertRuns(TestElseConnectionBug2Factory.getInstance(), new Object[]{42}, new Object[]{42});
+    }
+
+    @SuppressWarnings("unused")
+    @NodeChild
+    public abstract static class TestElseConnectionBug2 extends ValueNode {
+
+        @Specialization(guards = "guard0(value)")
+        public int do1(int value) {
+            throw new AssertionError();
+        }
+
+        @Specialization(guards = "guard1(value)")
+        public int do2(int value) {
+            throw new AssertionError();
+        }
+
+        @Specialization(guards = "!guard0(value)")
+        public int do3(int value) {
+            return value;
+        }
+
+        boolean guard0(int value) {
+            return false;
+        }
+
+        boolean guard1(int value) {
+            return false;
+        }
+    }
+
+}