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 23 * questions. 24 */ 25 26 package experiments; 27 28 import java.lang.reflect.Method; 29 import java.lang.reflect.code.CopyContext; 30 import java.lang.reflect.code.Op; 31 import java.lang.reflect.code.OpTransformer; 32 import java.lang.reflect.code.TypeElement; 33 import java.lang.reflect.code.Value; 34 import java.lang.reflect.code.op.CoreOp; 35 import java.lang.reflect.code.type.JavaType; 36 import java.lang.runtime.CodeReflection; 37 import java.util.ArrayList; 38 import java.util.List; 39 40 public class DNA { 41 static int myFunc(int i) { 42 return 0; 43 } 44 45 @CodeReflection 46 public static void addMul(int add, int mul) { 47 int len = myFunc(add); 48 } 49 50 public static class DNAOp extends Op { // externalized 51 private final TypeElement type; 52 53 DNAOp(String opName, TypeElement type, List<Value> operands) { 54 super(opName, operands); 55 this.type = type; 56 } 57 58 @Override 59 public Op transform(CopyContext copyContext, OpTransformer opTransformer) { 60 throw new IllegalStateException("in transform"); 61 // return null; 62 } 63 64 65 @Override 66 public TypeElement resultType() { 67 System.out.println("in result type"); 68 return type; 69 } 70 } 71 72 73 static public void main(String[] args) throws Exception { 74 Method method = DNA.class.getDeclaredMethod("addMul", int.class, int.class); 75 var funcOp = method.getCodeModel().get(); 76 var transformed = funcOp.transform((builder, op) -> { 77 CopyContext cc = builder.context(); 78 if (op instanceof CoreOp.InvokeOp invokeOp) { 79 // List<Value> operands = new ArrayList<>(); 80 //builder.op(new DNAOp("dna", JavaType.INT, operands)); 81 List<Value> inputOperands = invokeOp.operands(); 82 List<Value> outputOperands = cc.getValues(inputOperands); 83 Op.Result inputResult = invokeOp.result(); 84 Op.Result outputResult = builder.op(new DNAOp("dna", JavaType.INT, outputOperands)); 85 cc.mapValue(inputResult, outputResult); 86 } else { 87 builder.op(op); 88 } 89 return builder; 90 }); 91 92 93 System.out.println(transformed.toText()); 94 95 } 96 } 97