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/*
* Copyright (c) 2023, Red Hat, Inc. 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.
*
* 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.
*/
/*
* @test
* bug 8318826
* @summary C2: "Bad graph detected in build_loop_late" with incremental inlining
* @requires vm.compiler2.enabled
* @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:+AlwaysIncrementalInline -XX:-BackgroundCompilation TestNullAtCallAfterLateInline
*/
public class TestNullAtCallAfterLateInline {
private static final C c = new C();
private static final A a = new A();
private static volatile int volatileField;
private static B b= new B();
public static void main(String[] args) {
for (int i = 0; i < 20_000; i++) {
testHelper1(0, true);
testHelper1(1, true);
testHelper1(2, true);
test1(false);
testHelper2(0, true, b);
testHelper2(1, true, c);
testHelper2(2, true, a);
inlined2(null, 3);
test2(false, null);
}
}
private static int test1(boolean flag) {
for (int i = 0; i < 10; i++) {
}
return testHelper1(3, flag);
}
private static int testHelper1(int i, boolean flag) {
int v;
if (flag) {
A a = inlined1(i);
a.notInlined();
v = a.field;
} else {
volatileField = 42;
v = volatileField;
}
return v;
}
private static A inlined1(int i) {
if (i == 0) {
return b;
} else if (i == 1) {
return c;
} else if (i == 2) {
return a;
}
return null;
}
private static int test2(boolean flag, A a) {
for (int i = 0; i < 10; i++) {
}
return testHelper2(3, flag, a);
}
private static int testHelper2(int i, boolean flag, A a) {
int v;
if (flag) {
inlined2(a, i);
a.notInlined();
v = a.field;
} else {
volatileField = 42;
v = volatileField;
}
return v;
}
private static void inlined2(Object a, int i) {
if (i == 0) {
if (!(a instanceof B)) {
}
} else if (i == 1) {
if (!(a instanceof C)) {
}
} else if (i == 2) {
if (!(a instanceof A)) {
}
} else {
if (!(a instanceof D)) {
}
}
}
private static class A {
public int field;
void notInlined() {}
}
private static class B extends A {
void notInlined() {}
}
private static class C extends A {
void notInlined() {}
}
private static class D {
}
}
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