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| 1 | +/* |
| 2 | + * Copyright (c) 2024 Red Hat 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 | +package compiler.c2.gvn; |
| 25 | + |
| 26 | +import compiler.lib.ir_framework.*; |
| 27 | + |
| 28 | +import java.util.Random; |
| 29 | + |
| 30 | +/** |
| 31 | + * @test |
| 32 | + * @bug 8327381 |
| 33 | + * @summary Refactor boolean node tautology transformations |
| 34 | + * @library /test/lib / |
| 35 | + * @run driver compiler.c2.gvn.TestBoolNodeGVN |
| 36 | + */ |
| 37 | +public class TestBoolNodeGVN { |
| 38 | + public static void main(String[] args) { |
| 39 | + TestFramework.run(); |
| 40 | + testCorrectness(); |
| 41 | + } |
| 42 | + |
| 43 | + /** |
| 44 | + * Test changing ((x & m) u<= m) or ((m & x) u<= m) to always true, same with ((x & m) u< m+1) and ((m & x) u< m+1) |
| 45 | + * The test is only applicable to x64, aarch64 and riscv64 for having <code>Integer.compareUnsigned</code> |
| 46 | + * intrinsified. |
| 47 | + */ |
| 48 | + @Test |
| 49 | + @Arguments(values = {Argument.DEFAULT, Argument.DEFAULT}) |
| 50 | + @IR(failOn = IRNode.CMP_U, |
| 51 | + phase = CompilePhase.AFTER_PARSING, |
| 52 | + applyIfPlatformOr = {"x64", "true", "aarch64", "true", "riscv64", "true"}) |
| 53 | + public static boolean testShouldReplaceCpmUCase1(int x, int m) { |
| 54 | + return !(Integer.compareUnsigned((x & m), m) > 0); // assert in inversions to generates the pattern looking for |
| 55 | + } |
| 56 | + @Test |
| 57 | + @Arguments(values = {Argument.DEFAULT, Argument.DEFAULT}) |
| 58 | + @IR(failOn = IRNode.CMP_U, |
| 59 | + phase = CompilePhase.AFTER_PARSING, |
| 60 | + applyIfPlatformOr = {"x64", "true", "aarch64", "true", "riscv64", "true"}) |
| 61 | + public static boolean testShouldReplaceCpmUCase2(int x, int m) { |
| 62 | + return !(Integer.compareUnsigned((m & x), m) > 0); |
| 63 | + } |
| 64 | + |
| 65 | + @Test |
| 66 | + @Arguments(values = {Argument.DEFAULT, Argument.DEFAULT}) |
| 67 | + @IR(failOn = IRNode.CMP_U, |
| 68 | + phase = CompilePhase.AFTER_PARSING, |
| 69 | + applyIfPlatformOr = {"x64", "true", "aarch64", "true", "riscv64", "true"}) |
| 70 | + public static boolean testShouldReplaceCpmUCase3(int x, int m) { |
| 71 | + return Integer.compareUnsigned((x & m), m + 1) < 0; |
| 72 | + } |
| 73 | + |
| 74 | + @Test |
| 75 | + @Arguments(values = {Argument.DEFAULT, Argument.DEFAULT}) |
| 76 | + @IR(failOn = IRNode.CMP_U, |
| 77 | + phase = CompilePhase.AFTER_PARSING, |
| 78 | + applyIfPlatformOr = {"x64", "true", "aarch64", "true", "riscv64", "true"}) |
| 79 | + public static boolean testShouldReplaceCpmUCase4(int x, int m) { |
| 80 | + return Integer.compareUnsigned((m & x), m + 1) < 0; |
| 81 | + } |
| 82 | + |
| 83 | + @Test |
| 84 | + @Arguments(values = {Argument.DEFAULT, Argument.DEFAULT}) |
| 85 | + @IR(counts = {IRNode.CMP_U, "1"}, |
| 86 | + phase = CompilePhase.AFTER_PARSING, |
| 87 | + applyIfPlatformOr = {"x64", "true", "aarch64", "true", "riscv64", "true"}) |
| 88 | + public static boolean testShouldHaveCpmUCase1(int x, int m) { |
| 89 | + return !(Integer.compareUnsigned((x & m), m - 1) > 0); |
| 90 | + } |
| 91 | + |
| 92 | + @Test |
| 93 | + @Arguments(values = {Argument.DEFAULT, Argument.DEFAULT}) |
| 94 | + @IR(counts = {IRNode.CMP_U, "1"}, |
| 95 | + phase = CompilePhase.AFTER_PARSING, |
| 96 | + applyIfPlatformOr = {"x64", "true", "aarch64", "true", "riscv64", "true"}) |
| 97 | + public static boolean testShouldHaveCpmUCase2(int x, int m) { |
| 98 | + return !(Integer.compareUnsigned((m & x), m - 1) > 0); |
| 99 | + } |
| 100 | + |
| 101 | + @Test |
| 102 | + @Arguments(values = {Argument.DEFAULT, Argument.DEFAULT}) |
| 103 | + @IR(counts = {IRNode.CMP_U, "1"}, |
| 104 | + phase = CompilePhase.AFTER_PARSING, |
| 105 | + applyIfPlatformOr = {"x64", "true", "aarch64", "true", "riscv64", "true"}) |
| 106 | + public static boolean testShouldHaveCpmUCase3(int x, int m) { |
| 107 | + return Integer.compareUnsigned((x & m), m + 2) < 0; |
| 108 | + } |
| 109 | + |
| 110 | + @Test |
| 111 | + @Arguments(values = {Argument.DEFAULT, Argument.DEFAULT}) |
| 112 | + @IR(counts = {IRNode.CMP_U, "1"}, |
| 113 | + phase = CompilePhase.AFTER_PARSING, |
| 114 | + applyIfPlatformOr = {"x64", "true", "aarch64", "true", "riscv64", "true"}) |
| 115 | + public static boolean testShouldHaveCpmUCase4(int x, int m) { |
| 116 | + return Integer.compareUnsigned((m & x), m + 2) < 0; |
| 117 | + } |
| 118 | + |
| 119 | + private static void testCorrectness() { |
| 120 | + int[] values = { |
| 121 | + 0, 1, 5, 8, 16, 42, 100, new Random().nextInt(0, Integer.MAX_VALUE), Integer.MAX_VALUE |
| 122 | + }; |
| 123 | + |
| 124 | + for (int x : values) { |
| 125 | + for (int m : values) { |
| 126 | + if (!testShouldReplaceCpmUCase1(x, m) | |
| 127 | + !testShouldReplaceCpmUCase2(x, m) | |
| 128 | + !testShouldReplaceCpmUCase3(x, m) | |
| 129 | + !testShouldReplaceCpmUCase4(x, m)) { |
| 130 | + throw new RuntimeException("Bad result for x = " + x + " and m = " + m + ", expected always true"); |
| 131 | + } |
| 132 | + } |
| 133 | + } |
| 134 | + } |
| 135 | +} |
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