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.CopyContext; 28 import java.lang.reflect.code.OpTransformer; 29 import java.lang.reflect.code.op.CoreOp; 30 import java.lang.reflect.code.Op; 31 import java.lang.reflect.code.Quoted; 32 import java.lang.reflect.code.analysis.SSA; 33 import java.lang.reflect.code.interpreter.Interpreter; 34 35 /* 36 * @test 37 * @run testng TestExpressionElimination 38 */ 39 40 public class TestExpressionElimination { 41 42 @Test 43 public void testAddZero() { 44 CoreOp.ClosureOp lf = generate((double a) -> a + 0.0); 45 46 Assert.assertEquals((double) Interpreter.invoke(lf, 1.0d), 1.0d); 47 } 48 49 @Test 50 public void testF() { 51 CoreOp.ClosureOp lf = generate((double a, double b) -> -a + b); 52 53 Assert.assertEquals((double) Interpreter.invoke(lf, 1.0d, 1.0d), 0.0d); 54 } 55 56 static CoreOp.ClosureOp generate(Quoted q) { 57 return generateF((CoreOp.ClosureOp) q.op()); 58 } 59 60 static <T extends Op & Op.Invokable> T generateF(T f) { 61 f.writeTo(System.out); 62 63 @SuppressWarnings("unchecked") 64 T lf = (T) f.transform(CopyContext.create(), OpTransformer.LOWERING_TRANSFORMER); 65 lf.writeTo(System.out); 66 67 lf = SSA.transform(lf); 68 lf.writeTo(System.out); 69 70 lf = ExpressionElimination.eliminate(lf); 71 lf.writeTo(System.out); 72 return lf; 73 } 74 }