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/*
* Copyright (c) 2025, Oracle and/or its affiliates. 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.
*/
import java.lang.reflect.Array;
import jdk.test.lib.Asserts;
/**
* @test
* @bug 8348631
* @summary Test folding of array guards used by intrinsics.
* @library /test/lib
* @run main/othervm -Xcomp -XX:-TieredCompilation
* -XX:CompileCommand=compileonly,TestArrayGuardWithInterfaces::test*
* TestArrayGuardWithInterfaces
*/
public class TestArrayGuardWithInterfaces {
public static interface MyInterface { }
public static int test1(Object obj) {
// Should be folded, arrays can never imlement 'MyInterface'
return Array.getLength((MyInterface)obj);
}
public static int test2(Object obj) {
// Should not be folded, arrays implement 'Cloneable'
return Array.getLength((Cloneable)obj);
}
public static void main(String[] args) {
// Warmup
Class c = MyInterface.class;
Array.getLength(args);
try {
test1(null);
throw new RuntimeException("No exception thrown");
} catch (Exception e) {
// Expected
}
Asserts.assertEQ(test2(new int[1]), 1);
}
}
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