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61 lines
2.3 KiB
Java
61 lines
2.3 KiB
Java
/*
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* Copyright (c) 2025, 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 8371674
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* @summary An expression of the form "MoveX2Y (LoadX mem)" should be
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* transformed into "LoadY mem". This test ensures that changes
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* to the number of users of the Load node propagate as expected
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* and that the optimization is not missed.
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* @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:-TieredCompilation -Xcomp
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* -XX:CompileCommand=compileonly,compiler.c2.TestMissingOptMoveX2YLoadX::test*
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* -XX:VerifyIterativeGVN=1110 compiler.c2.TestMissingOptMoveX2YLoadX
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* @run main compiler.c2.TestMissingOptMoveX2YLoadX
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*
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*/
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package compiler.c2;
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public class TestMissingOptMoveX2YLoadX {
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static final int N = 400;
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static volatile long b;
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public static void main(String[] strArr) {
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// could theoretically happen with other variants of MoveNode
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// but there is no known reproducer for the other cases
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Double.longBitsToDouble(0l);
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testMoveL2D();
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}
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static void testMoveL2D() {
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int e = 8, f, g = 9, h = 2, i[] = new int[N];
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long j[] = new long[N];
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while (++e < 37) {
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for (f = 1; f < 7; f++) {
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h >>>= (int)(--g - Double.longBitsToDouble(j[e]));
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b -= b;
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}
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}
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}
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} |