1 /*
 2  * Copyright (c) 2024, Oracle and/or its affiliates. All rights reserved.
 3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 4  *
 5  * This code is free software; you can redistribute it and/or modify it
 6  * under the terms of the GNU General Public License version 2 only, as
 7  * published by the Free Software Foundation.
 8  *
 9  * This code is distributed in the hope that it will be useful, but WITHOUT
10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12  * version 2 for more details (a copy is included in the LICENSE file that
13  * accompanied this code).
14  *
15  * You should have received a copy of the GNU General Public License version
16  * 2 along with this work; if not, write to the Free Software Foundation,
17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18  *
19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20  * or visit www.oracle.com if you need additional information or have any
21  * questions.
22  */
23 
24 import jdk.incubator.code.CopyContext;
25 import jdk.incubator.code.Op;
26 import jdk.incubator.code.OpTransformer;
27 import jdk.incubator.code.Quoted;
28 import jdk.incubator.code.analysis.SSA;
29 import jdk.incubator.code.dialect.core.CoreOp;
30 import jdk.incubator.code.interpreter.Interpreter;
31 import org.junit.jupiter.api.Assertions;
32 import org.junit.jupiter.api.Test;
33 
34 import java.lang.invoke.MethodHandles;
35 
36 /*
37  * @test
38  * @modules jdk.incubator.code
39  * @run junit TestExpressionElimination
40  */
41 
42 public class TestExpressionElimination {
43 
44     @Test
45     public void testAddZero() {
46         CoreOp.ClosureOp lf = generate((double a) -> a + 0.0);
47 
48         Assertions.assertEquals(1.0d, (double) Interpreter.invoke(MethodHandles.lookup(), lf, 1.0d));
49     }
50 
51     @Test
52     public void testF() {
53         CoreOp.ClosureOp lf = generate((double a, double b) -> -a + b);
54 
55         Assertions.assertEquals(0.0d, (double) Interpreter.invoke(MethodHandles.lookup(), lf, 1.0d, 1.0d));
56     }
57 
58     static CoreOp.ClosureOp generate(Quoted q) {
59         return generateF((CoreOp.ClosureOp) q.op());
60     }
61 
62     static <T extends Op & Op.Invokable> T generateF(T f) {
63         System.out.println(f.toText());
64 
65         @SuppressWarnings("unchecked")
66         T lf = (T) f.transform(CopyContext.create(), OpTransformer.LOWERING_TRANSFORMER);
67         System.out.println(lf.toText());
68 
69         lf = SSA.transform(lf);
70         System.out.println(lf.toText());
71 
72         lf = ExpressionElimination.eliminate(lf);
73         System.out.println(lf.toText());
74         return lf;
75     }
76 }