91 lines
2.8 KiB
Java
91 lines
2.8 KiB
Java
/*
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* Copyright (c) 2019, Red Hat, Inc. 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 8231550
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* @summary C2: ShouldNotReachHere() in verify_strip_mined_scheduling
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*
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* @run main/othervm -XX:-BackgroundCompilation -XX:LoopMaxUnroll=0 TestConservativeAntiDep
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*
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*/
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import java.lang.reflect.Array;
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import java.util.Arrays;
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public class TestConservativeAntiDep {
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private static long longField;
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public static void main(String[] args) throws InstantiationException, IllegalAccessException {
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for (int i = 0; i < 20_000; i++) {
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test1(A.class);
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test2(B.class);
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}
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}
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private static int test1(Class klass) {
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Object[] in = (Object[])Array.newInstance(klass, 100);
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Object[] o = in;
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int v = 1;
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// CountedLoop has control dependent CastPP
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for (int i = 0; i < 100 ; i++) {
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longField = i; // sunk in outer strip mined loop
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o = (A[]) o;
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v *= 2;
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}
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// LoadRange cannot float higher than CountedLoop (because of
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// CastPP) and is found anti-dependent with long store so
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// scheduled in outer strip mined loop
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return v + o.length;
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}
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private static int test2(Class klass) throws IllegalAccessException, InstantiationException {
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A in = (A)klass.newInstance();
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A o = in;
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int v = 1;
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// CountedLoop has control dependent CastPP
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for (int i = 0; i < 100 ; i++) {
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longField = i; // sunk in outer strip mined loop
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o = (B) o;
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v *= 2;
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}
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// Load cannot float higher than CountedLoop (because of
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// CastPP) and is found anti-dependent with long store so
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// scheduled in outer strip mined loop
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return v + o.intField;
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}
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private static class A {
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int intField;
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public A() {}
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}
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private static class B extends A {
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public B() {}
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}
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}
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