67 lines
2.4 KiB
Java
67 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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/*
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* @test
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* @bug 8277060
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* @requires vm.debug == true & vm.compiler2.enabled
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* @modules java.base/jdk.internal.misc
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*
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* @run main/othervm -Xbatch -XX:CompileCommand=dontinline,compiler.debug.TestTracePhaseCCP::test
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* -XX:CompileCommand=compileonly,compiler.debug.TestTracePhaseCCP::test -XX:+TracePhaseCCP
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* compiler.debug.TestTracePhaseCCP
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*/
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package compiler.debug;
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import jdk.internal.misc.Unsafe;
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import java.nio.ByteOrder;
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public class TestTracePhaseCCP {
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static private Unsafe UNSAFE = Unsafe.getUnsafe();
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static final boolean IS_BIG_ENDIAN = ByteOrder.nativeOrder() == ByteOrder.BIG_ENDIAN;
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static int[] srcArr = new int[1];
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static int[] dstArr = new int[1];
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static int test(boolean flag) {
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int[] srcArrIntLocal = new int[1];
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long[] srcArrLongLocal = new long[1];
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Object srcArrLocal = (flag ? srcArrIntLocal : srcArrLongLocal);
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long srcOffset = (flag ? Unsafe.ARRAY_INT_BASE_OFFSET : Unsafe.ARRAY_LONG_BASE_OFFSET);
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srcOffset += (!flag && IS_BIG_ENDIAN ? 4 : 0);
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UNSAFE.copyMemory(srcArrLocal, srcOffset, dstArr, Unsafe.ARRAY_INT_BASE_OFFSET, 4);
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return dstArr[0];
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}
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static boolean flag = false;
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public static void main(String[] args) {
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for (int i = 0; i < 20_000; i++) {
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flag = (i % 2 == 0);
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int r1 = test(flag);
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}
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}
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}
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