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 /*
25  * @test
26  * @run testng TestTraverse
27  */
28 
29 import org.testng.Assert;
30 import org.testng.annotations.Test;
31 
32 import java.lang.reflect.Method;
33 import java.lang.reflect.code.CodeElement;
34 import java.lang.reflect.code.Op;
35 import java.lang.reflect.code.OpTransformer;
36 import java.lang.reflect.code.analysis.SSA;
37 import java.lang.reflect.code.op.CoreOp;
38 import java.lang.runtime.CodeReflection;
39 import java.util.ArrayList;
40 import java.util.List;
41 import java.util.Optional;
42 import java.util.stream.Stream;
43 
44 public class TestTraverse {
45 
46     @CodeReflection
47     private static int f(String s, int i, List<Object> acc) {
48         char c = s.charAt(i);
49         int d = (c - '0');
50         int n = s.length();
51         while (++i < n) {
52             c = s.charAt(i);
53             if (c >= '0' && c <= '9') {
54                 d = d * 10 + (c - '0');
55                 continue;
56             }
57             break;
58         }
59         acc.add(d);
60         return i;
61     }
62 
63     @Test
64     public void test() {
65         CoreOp.FuncOp f = getFuncOp("f");
66         testTraverse(f);
67 
68         f = f.transform(OpTransformer.LOWERING_TRANSFORMER);
69         testTraverse(f);
70 
71         f = SSA.transform(f);
72         testTraverse(f);
73     }
74 
75     void testTraverse(Op op) {
76         List<CodeElement<?, ?>> tl = op.traverse(new ArrayList<>(), (l, e) -> {
77             l.add(e);
78             return l;
79         });
80         Assert.assertEquals(op.elements().toList(), tl);
81 
82         Assert.assertEquals(op.elements().limit(2).toList(), tl.subList(0, 2));
83     }
84 
85     static CoreOp.FuncOp getFuncOp(String name) {
86         Optional<Method> om = Stream.of(TestTraverse.class.getDeclaredMethods())
87                 .filter(m -> m.getName().equals(name))
88                 .findFirst();
89 
90         Method m = om.get();
91         return m.getCodeModel().get();
92     }
93 }