--- /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/ShortCircuitTest.java	Wed Jun 17 10:58:08 2015 +0200
@@ -0,0 +1,198 @@
+/*
+ * 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 static org.junit.Assert.*;
+
+import org.junit.*;
+
+import com.oracle.truffle.api.*;
+import com.oracle.truffle.api.dsl.*;
+import com.oracle.truffle.api.dsl.test.ShortCircuitTestFactory.DoubleChildNodeFactory;
+import com.oracle.truffle.api.dsl.test.ShortCircuitTestFactory.ShortCircuitWithImplicitCastNodeFactory;
+import com.oracle.truffle.api.dsl.test.ShortCircuitTestFactory.SingleChildNodeFactory;
+import com.oracle.truffle.api.dsl.test.ShortCircuitTestFactory.VarArgsNodeFactory;
+import com.oracle.truffle.api.dsl.test.TypeSystemTest.ArgumentNode;
+import com.oracle.truffle.api.dsl.test.TypeSystemTest.ValueNode;
+
+public class ShortCircuitTest {
+
+    @Test
+    public void testSingleChild1() {
+        ArgumentNode arg0 = new ArgumentNode(0);
+        CallTarget callTarget = TestHelper.createCallTarget(SingleChildNodeFactory.create(arg0));
+        SingleChildNode.needsChild = true;
+        assertEquals(42, callTarget.call(new Object[]{42}));
+        assertEquals(1, arg0.getInvocationCount());
+    }
+
+    @Test
+    public void testSingleChild2() {
+        ArgumentNode arg0 = new ArgumentNode(0);
+        CallTarget callTarget = TestHelper.createCallTarget(SingleChildNodeFactory.create(arg0));
+        SingleChildNode.needsChild = false;
+        assertEquals(0, callTarget.call(new Object[]{42}));
+        assertEquals(0, arg0.getInvocationCount());
+    }
+
+    @NodeChild("child0")
+    abstract static class SingleChildNode extends ValueNode {
+
+        static boolean needsChild;
+
+        @ShortCircuit("child0")
+        boolean needsChild0() {
+            return needsChild;
+        }
+
+        @Specialization
+        int doIt(boolean hasChild0, int child0) {
+            assert hasChild0 == needsChild0();
+            return child0;
+        }
+
+    }
+
+    @Test
+    public void testDoubleChild1() {
+        ArgumentNode arg0 = new ArgumentNode(0);
+        ArgumentNode arg1 = new ArgumentNode(1);
+        CallTarget callTarget = TestHelper.createCallTarget(DoubleChildNodeFactory.create(arg0, arg1));
+        assertEquals(42, callTarget.call(new Object[]{41, 42}));
+        assertEquals(1, arg1.getInvocationCount());
+    }
+
+    @Test
+    public void testDoubleChild2() {
+        ArgumentNode arg0 = new ArgumentNode(0);
+        ArgumentNode arg1 = new ArgumentNode(1);
+        CallTarget callTarget = TestHelper.createCallTarget(DoubleChildNodeFactory.create(arg0, arg1));
+        assertEquals(0, callTarget.call(new Object[]{42, 42}));
+        assertEquals(0, arg1.getInvocationCount());
+    }
+
+    @NodeChildren({@NodeChild("child0"), @NodeChild("child1")})
+    @SuppressWarnings("unused")
+    abstract static class DoubleChildNode extends ValueNode {
+
+        @ShortCircuit("child1")
+        boolean needsChild1(Object leftValue) {
+            return leftValue.equals(41);
+        }
+
+        @Specialization
+        int doIt(int child0, boolean hasChild1, int child1) {
+            return child1;
+        }
+
+    }
+
+    @NodeChildren({@NodeChild("child0"), @NodeChild("child1")})
+    @SuppressWarnings("unused")
+    abstract static class GuardChildNode extends ValueNode {
+
+        @ShortCircuit("child1")
+        boolean needsChild1(Object a) {
+            return a.equals(new Integer(42));
+        }
+
+        static boolean guard(int a, boolean hasB, int b) {
+            return false;
+        }
+
+        @Specialization(guards = "guard(a, hasB, b)")
+        int doIt(int a, boolean hasB, int b) {
+            return a + b;
+        }
+
+    }
+
+    @Test
+    public void testVarArgs1() {
+        ArgumentNode arg0 = new ArgumentNode(0);
+        ArgumentNode arg1 = new ArgumentNode(1);
+        CallTarget callTarget = TestHelper.createCallTarget(VarArgsNodeFactory.create(new ValueNode[]{arg0, arg1}));
+        assertEquals(42, callTarget.call(new Object[]{41, 42}));
+        assertEquals(1, arg1.getInvocationCount());
+    }
+
+    @Test
+    public void testVarArgs2() {
+        ArgumentNode arg0 = new ArgumentNode(0);
+        ArgumentNode arg1 = new ArgumentNode(1);
+        CallTarget callTarget = TestHelper.createCallTarget(VarArgsNodeFactory.create(new ValueNode[]{arg0, arg1}));
+        assertEquals(0, callTarget.call(new Object[]{42, 42}));
+        assertEquals(0, arg1.getInvocationCount());
+    }
+
+    @NodeChild(value = "children", type = ValueNode[].class)
+    abstract static class VarArgsNode extends ValueNode {
+
+        @ShortCircuit("children[1]")
+        boolean needsChild1(Object leftValue) {
+            return leftValue.equals(41);
+        }
+
+        @Specialization
+        @SuppressWarnings("unused")
+        int doIt(int child0, boolean hasChild1, int child1) {
+            return child1;
+        }
+
+    }
+
+    @Test
+    public void testShortCircuitWithImplicitCastNode() {
+        ArgumentNode arg0 = new ArgumentNode(0);
+        ArgumentNode arg1 = new ArgumentNode(1);
+        CallTarget callTarget = TestHelper.createCallTarget(ShortCircuitWithImplicitCastNodeFactory.create(new ValueNode[]{arg0, arg1}));
+        assertEquals(42, callTarget.call(new Object[]{42, 41}));
+    }
+
+    @TypeSystem(int.class)
+    abstract static class ShortCircuitWithImplicitCastTypes {
+
+        @ImplicitCast
+        public static int doAnImplicitCast(String foo) {
+            return Integer.parseInt(foo);
+        }
+
+    }
+
+    @NodeChild(value = "children", type = ValueNode[].class)
+    @TypeSystemReference(ShortCircuitWithImplicitCastTypes.class)
+    abstract static class ShortCircuitWithImplicitCastNode extends ValueNode {
+
+        @ShortCircuit("children[1]")
+        public boolean needsRightNode(Object left) {
+            return (int) left == 41;
+        }
+
+        @Specialization
+        public int doInteger(int left, boolean needsRight, int right) {
+            return needsRight ? right : left;
+        }
+
+    }
+
+}