| /* |
| * Copyright (c) 2011, 2015, 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.Test; |
| |
| import org.graalvm.compiler.nodes.FrameState; |
| import org.graalvm.compiler.nodes.StructuredGraph; |
| import org.graalvm.compiler.nodes.StructuredGraph.AllowAssumptions; |
| import org.graalvm.compiler.phases.common.CanonicalizerPhase; |
| import org.graalvm.compiler.phases.tiers.PhaseContext; |
| |
| public class IntegerEqualsCanonicalizerTest extends GraalCompilerTest { |
| |
| @Test |
| public void testSubtractEqualsZero() { |
| test("testSubtractEqualsZeroSnippet", "testSubtractEqualsZeroReference"); |
| } |
| |
| public static int testSubtractEqualsZeroReference(int a, int b) { |
| if (a == b) { |
| return 1; |
| } |
| return 0; |
| } |
| |
| public static int testSubtractEqualsZeroSnippet(int a, int b) { |
| if (a - b == 0) { |
| return 1; |
| } |
| return 0; |
| } |
| |
| @Test |
| public void testSubtractEqualsZeroLong() { |
| test("testSubtractEqualsZeroLongSnippet", "testSubtractEqualsZeroLongReference"); |
| } |
| |
| public static int testSubtractEqualsZeroLongReference(long a, long b) { |
| if (a == b) { |
| return 1; |
| } |
| return 0; |
| } |
| |
| public static int testSubtractEqualsZeroLongSnippet(long a, long b) { |
| if (a - b == 0) { |
| return 1; |
| } |
| return 0; |
| } |
| |
| /** |
| * Tests the canonicalization of (x >>> const) == 0 to x |test| (-1 << const). |
| */ |
| @Test |
| public void testShiftEquals() { |
| test("testShiftEqualsSnippet", "testShiftEqualsReference"); |
| } |
| |
| @SuppressWarnings("unused") private static int field; |
| |
| public static void testShiftEqualsSnippet(int x, int[] array, int y) { |
| // optimize |
| field = (x >>> 10) == 0 ? 1 : 0; |
| field = (array.length >> 10) == 0 ? 1 : 0; |
| field = (x << 10) == 0 ? 1 : 0; |
| // don't optimize |
| field = (x >> 10) == 0 ? 1 : 0; |
| field = (x >>> y) == 0 ? 1 : 0; |
| field = (x >> y) == 0 ? 1 : 0; |
| field = (x << y) == 0 ? 1 : 0; |
| field = (x >>> y) == 1 ? 1 : 0; |
| field = (x >> y) == 1 ? 1 : 0; |
| field = (x << y) == 1 ? 1 : 0; |
| } |
| |
| public static void testShiftEqualsReference(int x, int[] array, int y) { |
| field = (x & 0xfffffc00) == 0 ? 1 : 0; |
| field = (array.length & 0xfffffc00) == 0 ? 1 : 0; |
| field = (x & 0x3fffff) == 0 ? 1 : 0; |
| // don't optimize signed right shifts |
| field = (x >> 10) == 0 ? 1 : 0; |
| // don't optimize no-constant shift amounts |
| field = (x >>> y) == 0 ? 1 : 0; |
| field = (x >> y) == 0 ? 1 : 0; |
| field = (x << y) == 0 ? 1 : 0; |
| // don't optimize non-zero comparisons |
| field = (x >>> y) == 1 ? 1 : 0; |
| field = (x >> y) == 1 ? 1 : 0; |
| field = (x << y) == 1 ? 1 : 0; |
| } |
| |
| @Test |
| public void testCompare() { |
| test("testCompareSnippet", "testCompareReference"); |
| } |
| |
| public static void testCompareSnippet(int x, int y, int[] array1, int[] array2) { |
| int tempX = x; |
| int array1Length = array1.length; |
| int array2Length = array2.length; |
| // optimize |
| field = x == tempX ? 1 : 0; |
| field = x != tempX ? 1 : 0; |
| field = array1Length != (-1 - array2Length) ? 1 : 0; |
| field = array1Length == (-1 - array2Length) ? 1 : 0; |
| // don't optimize |
| field = x == y ? 1 : 0; |
| field = array1Length == array2Length ? 1 : 0; |
| field = array1Length == (-array2Length) ? 1 : 0; |
| } |
| |
| public static void testCompareReference(int x, int y, int[] array1, int[] array2) { |
| int array1Length = array1.length; |
| int array2Length = array2.length; |
| // optimize |
| field = 1; |
| field = 0; |
| field = 1; |
| field = 0; |
| // don't optimize (overlapping value ranges) |
| field = x == y ? 1 : 0; |
| field = array1Length == array2Length ? 1 : 0; |
| field = array1Length == (-array2Length) ? 1 : 0; |
| } |
| |
| public static boolean testNormalIntegerTest(int a) { |
| return (a & 8) != 0; |
| } |
| |
| public static boolean testAlternateIntegerTest(int a) { |
| return (a & 8) == 8; |
| } |
| |
| @Test |
| public void testIntegerTest() { |
| test("testNormalIntegerTest", "testAlternateIntegerTest"); |
| } |
| |
| private void test(String snippet, String referenceSnippet) { |
| StructuredGraph graph = getCanonicalizedGraph(snippet); |
| StructuredGraph referenceGraph = getCanonicalizedGraph(referenceSnippet); |
| assertEquals(referenceGraph, graph); |
| } |
| |
| private StructuredGraph getCanonicalizedGraph(String snippet) { |
| StructuredGraph graph = parseEager(snippet, AllowAssumptions.YES); |
| new CanonicalizerPhase().apply(graph, new PhaseContext(getProviders())); |
| for (FrameState state : graph.getNodes(FrameState.TYPE).snapshot()) { |
| state.replaceAtUsages(null); |
| state.safeDelete(); |
| } |
| return graph; |
| } |
| } |