/* * Copyright (c) 2014, 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 org.graalvm.compiler.core.test; import org.junit.Assert; import org.junit.Test; /** * Check for incorrect elimination of 0.0 and -0.0 from computations. They can affect the sign of * the result of an add or substract. */ public class FloatOptimizationTest extends GraalCompilerTest { @Test public void test1() { test("test1Snippet", -0.0); } @SuppressWarnings("all") public static double test1Snippet(double x) { return x + 0.0; } @Test public void test2() { test("test2Snippet", -0.0f); } @SuppressWarnings("all") public static double test2Snippet(float x) { return x + 0.0f; } @Test public void test3() { test("test3Snippet", -0.0); } @SuppressWarnings("all") public static double test3Snippet(double x) { return x - -0.0; } @Test public void test4() { test("test4Snippet", -0.0f); } @SuppressWarnings("all") public static double test4Snippet(float x) { return x - -0.0f; } @Override protected void assertDeepEquals(String message, Object expected, Object actual, double delta) { if (expected instanceof Double && actual instanceof Double) { double e = (double) expected; double a = (double) actual; if (Double.doubleToRawLongBits(a) != Double.doubleToRawLongBits(e)) { Assert.fail((message == null ? "" : message) + "raw double bits not equal " + Double.doubleToRawLongBits(a) + " != " + Double.doubleToRawLongBits(e)); } } else { super.assertDeepEquals(message, expected, actual, delta); } } }