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/*
* 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.*;
/*
* @test
* @bug 8297384
* @summary Test that Ideal transformations of URShiftINode* are being performed as expected.
* @library /test/lib /
* @run driver compiler.c2.irTests.URShiftINodeIdealizationTests
*/
public class URShiftINodeIdealizationTests {
public static void main(String[] args) {
TestFramework.run();
}
@Run(test = { "test1", "test2" })
public void runMethod() {
int a = RunInfo.getRandom().nextInt();
int min = Integer.MIN_VALUE;
int max = Integer.MAX_VALUE;
assertResult(0);
assertResult(a);
assertResult(min);
assertResult(max);
}
@DontCompile
public void assertResult(int a) {
Asserts.assertEQ((a << 2022) >>> 2022, test1(a));
Asserts.assertEQ((a >> 2022) >>> 31, test2(a));
}
@Test
@IR(failOn = { IRNode.LSHIFT, IRNode.URSHIFT })
@IR(counts = { IRNode.AND, "1" })
// Checks (x << 2022) >>> 2022 => x & C where C = ((1 << (32 - 6)) - 1)
public int test1(int x) {
return (x << 2022) >>> 2022;
}
@Test
@IR(failOn = { IRNode.RSHIFT })
@IR(counts = { IRNode.URSHIFT, "1" })
// Checks (x >> 2022) >>> 31 => x >>> 31
public int test2(int x) {
return (x >> 2022) >>> 31;
}
}
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