76 lines
2.4 KiB
Java
76 lines
2.4 KiB
Java
/*
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* Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package compiler.c2.irTests;
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import jdk.test.lib.Asserts;
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import compiler.lib.ir_framework.*;
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/*
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* @test
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* @bug 8297384
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* @summary Test that Ideal transformations of URShiftINode* are being performed as expected.
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* @library /test/lib /
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* @run driver compiler.c2.irTests.URShiftINodeIdealizationTests
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*/
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public class URShiftINodeIdealizationTests {
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public static void main(String[] args) {
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TestFramework.run();
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}
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@Run(test = { "test1", "test2" })
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public void runMethod() {
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int a = RunInfo.getRandom().nextInt();
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int min = Integer.MIN_VALUE;
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int max = Integer.MAX_VALUE;
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assertResult(0);
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assertResult(a);
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assertResult(min);
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assertResult(max);
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}
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@DontCompile
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public void assertResult(int a) {
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Asserts.assertEQ((a << 2022) >>> 2022, test1(a));
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Asserts.assertEQ((a >> 2022) >>> 31, test2(a));
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}
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@Test
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@IR(failOn = { IRNode.LSHIFT, IRNode.URSHIFT })
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@IR(counts = { IRNode.AND, "1" })
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// Checks (x << 2022) >>> 2022 => x & C where C = ((1 << (32 - 6)) - 1)
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public int test1(int x) {
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return (x << 2022) >>> 2022;
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}
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@Test
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@IR(failOn = { IRNode.RSHIFT })
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@IR(counts = { IRNode.URSHIFT, "1" })
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// Checks (x >> 2022) >>> 31 => x >>> 31
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public int test2(int x) {
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return (x >> 2022) >>> 31;
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}
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}
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