--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/com.oracle.truffle.api.dsl.test/src/com/oracle/truffle/api/dsl/test/ExecuteGroupingTest.java	Tue Apr 14 15:12:48 2015 +0200
@@ -0,0 +1,196 @@
+/*
+ * Copyright (c) 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 com.oracle.truffle.api.dsl.test;
+
+import org.junit.*;
+import org.junit.experimental.theories.*;
+import org.junit.runner.*;
+import org.junit.runners.Parameterized.Parameters;
+
+import static org.junit.Assert.*;
+
+import com.oracle.truffle.api.dsl.*;
+import com.oracle.truffle.api.dsl.test.ExecuteGroupingTestFactory.ExecuteGrouping1NodeGen;
+import com.oracle.truffle.api.frame.*;
+import com.oracle.truffle.api.nodes.*;
+
+/*
+ * This test aims to test the reuse of execute methods with evaluated parameters as much as possible.
+ */
+@SuppressWarnings("unused")
+@RunWith(Theories.class)
+public class ExecuteGroupingTest {
+
+    @DataPoints public static final Object[] parameters = new Object[]{1, 2};
+
+    static final class ExecuteGroupingChild extends Node {
+
+        int invocationCount = 0;
+
+        private final Object returnValue;
+
+        public ExecuteGroupingChild(Object returnValue) {
+            this.returnValue = returnValue;
+        }
+
+        Object execute() {
+            invocationCount++;
+            return returnValue;
+        }
+
+    }
+
+    @Theory
+    public void testExecuteGrouping1Node(Object a, Object b, Object c) throws UnexpectedResultException {
+        ExecuteGroupingChild child0 = new ExecuteGroupingChild(a);
+        ExecuteGroupingChild child1 = new ExecuteGroupingChild(b);
+        ExecuteGroupingChild child2 = new ExecuteGroupingChild(c);
+
+        int result = ((int) a) + ((int) b) + ((int) c);
+
+        assertEquals(result, TestHelper.createRoot(ExecuteGrouping1NodeGen.create(child0, child1, child2)).execute());
+        assertEquals(result, TestHelper.createRoot(ExecuteGrouping1NodeGen.create(child0, child1, child2)).execute((VirtualFrame) null));
+        assertEquals(result, TestHelper.createRoot(ExecuteGrouping1NodeGen.create(null, child1, child2)).execute(a));
+        assertEquals(result, TestHelper.createRoot(ExecuteGrouping1NodeGen.create(null, child1, child2)).executeInt(a));
+
+        assertEquals(result, TestHelper.createRoot(ExecuteGrouping1NodeGen.create(null, null, child2)).execute(a, b));
+        assertEquals(result, TestHelper.createRoot(ExecuteGrouping1NodeGen.create(null, null, child2)).execute((int) a, b));
+        assertEquals(result, TestHelper.createRoot(ExecuteGrouping1NodeGen.create(null, null, child2)).execute(a, (int) b));
+        assertEquals(result, TestHelper.createRoot(ExecuteGrouping1NodeGen.create(null, null, child2)).execute((int) a, (int) b));
+        assertEquals(result, TestHelper.createRoot(ExecuteGrouping1NodeGen.create(null, null, child2)).executeInt((int) a, (int) b));
+
+        assertEquals(result, TestHelper.createRoot(ExecuteGrouping1NodeGen.create(null, null, null)).execute(a, b, c));
+        assertEquals(result, TestHelper.createRoot(ExecuteGrouping1NodeGen.create(null, null, null)).execute((int) a, (int) b, c));
+        assertEquals(result, TestHelper.createRoot(ExecuteGrouping1NodeGen.create(null, null, null)).execute((int) a, (int) b, (int) c));
+
+    }
+
+    @NodeChildren({@NodeChild(type = ExecuteGroupingChild.class), @NodeChild(type = ExecuteGroupingChild.class), @NodeChild(type = ExecuteGroupingChild.class)})
+    abstract static class ExecuteGrouping1Node extends Node {
+
+        abstract Object execute();
+
+        int executeInt() throws UnexpectedResultException {
+            Object value = execute();
+            if (value instanceof Integer) {
+                return (int) value;
+            }
+            throw new UnexpectedResultException(value);
+        }
+
+        abstract double executeDouble() throws UnexpectedResultException;
+
+        abstract Object execute(VirtualFrame frame);
+
+        abstract Object execute(Object o1);
+
+        abstract int executeInt(Object o1) throws UnexpectedResultException;
+
+        abstract Object execute(Object o1, Object o2);
+
+        abstract Object execute(int o1, int o2);
+
+        abstract Object execute(int o1, int o2, Object o3);
+
+        abstract int executeInt(int o1, int o2) throws UnexpectedResultException;
+
+        abstract Object execute(Object o1, int o2);
+
+        abstract Object execute(int o1, Object o2);
+
+        abstract Object execute(Object o1, Object o2, Object o3);
+
+        abstract Object execute(int o1, int o2, int o3);
+
+        @Specialization
+        int s1(int a, int b, int c) {
+            return a + b + c;
+        }
+
+        @Specialization
+        int s2(Object a, Object b, Object c) {
+            return ((int) a) + ((int) b) + ((int) c);
+        }
+
+    }
+
+    abstract static class StrangeReturnCase extends Node {
+
+        // we don't know how to implement executeDouble
+        public abstract double executeDouble();
+
+        public int executeInt() {
+            return 42;
+        }
+
+        @Specialization(rewriteOn = RuntimeException.class)
+        int s1() {
+            return 42;
+        }
+
+        @Specialization
+        int s2() {
+            return 42;
+        }
+
+    }
+
+    @ExpectError("Incompatible abstract execute methods found [executeDouble(), executeInt()].%")
+    abstract static class IncompatibleAbstract1 extends Node {
+
+        // we don't know how to implement executeDouble
+        abstract double executeDouble();
+
+        abstract int executeInt();
+
+        @Specialization
+        int s1() {
+            return 42;
+        }
+
+    }
+
+    abstract static class IncompatibleAbstract2 extends Node {
+
+        abstract double executeDouble();
+
+        // we can resolve duplicate path errors by making an execute method final
+        @SuppressWarnings("static-method")
+        public final int executeInt() {
+            return 42;
+        }
+
+        @ExpectError("The provided return type \"int\" does not match expected return type \"double\".%")
+        @Specialization(rewriteOn = RuntimeException.class)
+        int s1() {
+            return 42;
+        }
+
+        @Specialization
+        double s2() {
+            return 42;
+        }
+
+    }
+
+}