96 lines
3.3 KiB
Java
96 lines
3.3 KiB
Java
/*
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* Copyright (c) 2016, 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 8149797
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* @summary node replaced by dominating dead cast during parsing
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*
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* @run main/othervm -XX:-UseOnStackReplacement -XX:-BackgroundCompilation
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* -XX:TypeProfileLevel=200
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* -XX:CompileCommand=dontinline,compiler.c2.TestDominatingDeadCheckCast::not_inlined
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* compiler.c2.TestDominatingDeadCheckCast
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*/
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package compiler.c2;
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public class TestDominatingDeadCheckCast {
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static class A {
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int f;
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}
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static class B extends A {
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}
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static A not_inlined() {
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return new A();
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}
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static void inlined(A param) {
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param.f = 42;
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}
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static A field;
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static void test(boolean flag1, boolean flag2, boolean flag3, boolean flag4, boolean flag5) {
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// Go through memory rather than through a local to defeat C2's replace_in_map
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field = not_inlined();
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// Speculation adds a CheckCast on entry of this inlined
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// method for the parameter
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inlined(field);
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// Walk up the dominators is depth limited, make the CheckCast
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// above unreachable from the last inlined call
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if (flag1) {
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if (flag2) {
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if (flag3) {
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// Speculation adds a CheckCast on entry of this
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// inlined method for the parameter. This
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// CheckCast is replaced by the CheckCast of the
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// first inlined method call but the replaced
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// CheckCast is still around during parsing.
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inlined(field);
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// Same as above, some useless control
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if (flag4) {
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if (flag5) {
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// Speculation adds a CheckCast on entry
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// of this inlined method for the
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// parameter. This CheckCast is replaced
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// by the dead CheckCast of the previous
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// inlined() call.
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inlined(field);
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}
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}
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}
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}
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}
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}
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static public void main(String[] args) {
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field = new A();
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for (int i = 0; i < 20000; i++) {
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test(true, true, true, true, true);
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}
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}
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}
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