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Add IR test

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Quan Anh Mai 2026-01-24 01:02:42 +07:00
parent 899d89f3ab
commit 134f72112b
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test/hotspot/jtreg/compiler/integerArithmetic/TestHoistDivision.java Normal file
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/*
* Copyright (c) 2026, 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. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* 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.integerArithmetic;
import compiler.lib.ir_framework.*;
import jdk.test.lib.Asserts;
/*
* @test
* @bug 8347365
* @summary Tests that divisions are hoisted when their zero checks are elided.
* @library /test/lib /
* @run driver ${test.main.class}
*/
public class TestHoistDivision {
public static void main(String[] args) {
TestFramework.run();
}
@DontInline
private static void dontInline() {}
@Run(test = {"testCommon", "testHoistOutOfLoop"})
public void run() {
Asserts.assertEQ(2, testCommon(1, 1));
Asserts.assertEQ(0, testHoistOutOfLoop(1, 1, true, 1, 4, 2));
Asserts.assertEQ(0, testHoistOutOfLoop(1, 1, false, 1, 4, 2));
}
@Test
@IR(counts = {IRNode.DIV_I, "1", IRNode.DIV_BY_ZERO_TRAP, "1"})
public int testCommon(int x, int y) {
// The 2 divisions should be commoned
int result = x / y;
dontInline();
return result + x / y;
}
@Test
@IR(failOn = IRNode.DIV_BY_ZERO_TRAP, counts = {IRNode.DIV_I, "1", IRNode.TRAP, "1"})
public int testHoistOutOfLoop(int x, int y, boolean b, int start, int limit, int step) {
// The divisions should be hoisted out of the loop, allowing them to be commoned
int result = 0;
for (int i = start; i < limit; i *= step) {
if (b) {
dontInline();
result += x / y;
} else {
result -= x / y;
}
b = !b;
}
return result;
}
}