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 org.testng.Assert;
25 import org.testng.annotations.Test;
26 
27 import java.lang.reflect.code.OpTransformer;
28 import java.lang.reflect.code.op.CoreOp;
29 import java.lang.reflect.code.Op;
30 import java.lang.reflect.code.interpreter.Interpreter;
31 import java.lang.reflect.Method;
32 import java.lang.runtime.CodeReflection;
33 import java.util.Optional;
34 import java.util.stream.Stream;
35 
36 /*
37  * @test
38  * @run testng TestWhileOp
39  */
40 
41 public class TestWhileOp {
42 
43     @CodeReflection
44     public static int whileLoop() {
45         int i = 0;
46         while (i < 10) {
47             i++;
48         }
49         return i;
50     }
51 
52     @Test
53     public void testWhileLoop() {
54         CoreOp.FuncOp f = getFuncOp("whileLoop");
55 
56         f.writeTo(System.out);
57 
58         CoreOp.FuncOp lf = f.transform(OpTransformer.LOWERING_TRANSFORMER);
59 
60         lf.writeTo(System.out);
61 
62         Assert.assertEquals(Interpreter.invoke(lf), whileLoop());
63     }
64 
65     @CodeReflection
66     public static int doWhileLoop() {
67         int i = 0;
68         do {
69             i++;
70         } while (i < 10);
71         return i;
72     }
73 
74     @Test
75     public void testDpWhileLoop() {
76         CoreOp.FuncOp f = getFuncOp("doWhileLoop");
77 
78         f.writeTo(System.out);
79 
80         CoreOp.FuncOp lf = f.transform(OpTransformer.LOWERING_TRANSFORMER);
81 
82         lf.writeTo(System.out);
83 
84         Assert.assertEquals(Interpreter.invoke(lf), doWhileLoop());
85     }
86 
87     static CoreOp.FuncOp getFuncOp(String name) {
88         Optional<Method> om = Stream.of(TestWhileOp.class.getDeclaredMethods())
89                 .filter(m -> m.getName().equals(name))
90                 .findFirst();
91 
92         Method m = om.get();
93         return m.getCodeModel().get();
94     }
95 }