/* * Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ package compiler.c2.irTests; import jdk.test.lib.Asserts; import compiler.lib.ir_framework.*; import java.util.Random; import jdk.test.lib.Utils; /* * @test * @bug 8291336 * @summary Test that transformation of multiply-by-2 is appropriately turned into additions. * @library /test/lib / * @requires vm.compiler2.enabled * @run driver compiler.c2.irTests.TestMulNodeIdealization */ public class TestMulNodeIdealization { private static final Random RANDOM = Utils.getRandomInstance(); public static void main(String[] args) { TestFramework.run(); } @Test @IR(failOn = {IRNode.MUL}) // Checks x * 2 -> x + x public float testFloat(float x) { return x * 2; } @Test @IR(failOn = {IRNode.MUL}) // Checks x * 2 -> x + x public double testDouble(double x) { return x * 2; } @Run(test = "testFloat") public void runTestFloat() { float value = RANDOM.nextFloat(); float interpreterResult = value * 2; Asserts.assertEQ(testFloat(value), interpreterResult); } @Run(test = "testDouble") public void runTestDouble() { double value = RANDOM.nextDouble(); double interpreterResult = value * 2; Asserts.assertEQ(testDouble(value), interpreterResult); } }