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.  Oracle designates this
 8  * particular file as subject to the "Classpath" exception as provided
 9  * by Oracle in the LICENSE file that accompanied this code.
10  *
11  * This code is distributed in the hope that it will be useful, but WITHOUT
12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14  * version 2 for more details (a copy is included in the LICENSE file that
15  * accompanied this code).
16  *
17  * You should have received a copy of the GNU General Public License version
18  * 2 along with this work; if not, write to the Free Software Foundation,
19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20  *
21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22  * or visit www.oracle.com if you need additional information or have any
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24  */
25 
26 package experiments;
27 
28 import java.lang.reflect.Method;
29 import jdk.incubator.code.CopyContext;
30 import jdk.incubator.code.Op;
31 import jdk.incubator.code.OpTransformer;
32 import jdk.incubator.code.TypeElement;
33 import jdk.incubator.code.Value;
34 import jdk.incubator.code.CodeReflection;
35 import jdk.incubator.code.dialect.java.JavaOp;
36 import jdk.incubator.code.dialect.java.JavaType;
37 
38 import java.util.ArrayList;
39 import java.util.List;
40 
41 public class DNA {
42     static int myFunc(int i) {
43         return 0;
44     }
45 
46     @CodeReflection
47     public static void addMul(int add, int mul) {
48         int len = myFunc(add);
49     }
50 
51     public static class DNAOp extends Op { // externalized
52         private final TypeElement type;
53 
54         DNAOp(String opName, TypeElement type, List<Value> operands) {
55             super(opName, operands);
56             this.type = type;
57         }
58 
59         @Override
60         public Op transform(CopyContext copyContext, OpTransformer opTransformer) {
61             throw new IllegalStateException("in transform");
62             //  return null;
63         }
64 
65 
66         @Override
67         public TypeElement resultType() {
68             System.out.println("in result type");
69             return type;
70         }
71     }
72 
73 
74     static public void main(String[] args) throws Exception {
75         Method method = DNA.class.getDeclaredMethod("addMul", int.class, int.class);
76         var funcOp = Op.ofMethod(method).get();
77         var transformed = funcOp.transform((builder, op) -> {
78             CopyContext cc = builder.context();
79             if (op instanceof JavaOp.InvokeOp invokeOp) {
80                // List<Value> operands = new ArrayList<>();
81                 //builder.op(new DNAOp("dna", JavaType.INT, operands));
82                 List<Value> inputOperands = invokeOp.operands();
83                 List<Value> outputOperands = cc.getValues(inputOperands);
84                 Op.Result inputResult = invokeOp.result();
85                 Op.Result outputResult = builder.op(new DNAOp("dna", JavaType.INT, outputOperands));
86                 cc.mapValue(inputResult, outputResult);
87             } else {
88                 builder.op(op);
89             }
90             return builder;
91         });
92 
93 
94         System.out.println(transformed.toText());
95 
96     }
97 }
98