test/hotspot/jtreg/compiler/unsafe/TestUnsafeLoadWithZeroAddress.java

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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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/*
 * @test
 * @bug 8224658
 * @summary Test compilation of unsafe access with zero address.
 * @modules java.base/jdk.internal.misc:+open
 * @run main/othervm -Xcomp
 *                   -XX:CompileCommand=compileonly,compiler.unsafe.TestUnsafeLoadWithZeroAddress::*
 *                   compiler.unsafe.TestUnsafeLoadWithZeroAddress
 * @run main/othervm -Xcomp -XX:+IgnoreUnrecognizedVMOptions -XX:+AlwaysIncrementalInline
 *                   -XX:CompileCommand=compileonly,compiler.unsafe.TestUnsafeLoadWithZeroAddress::*
 *                   compiler.unsafe.TestUnsafeLoadWithZeroAddress
 */

package compiler.unsafe;

import jdk.internal.misc.Unsafe;

public class TestUnsafeLoadWithZeroAddress {
    static final Unsafe UNSAFE = Unsafe.getUnsafe();
    static boolean f;

    public static void test1() {
        if (f) {
            // This branch is never executed but compiled due to -Xcomp
            UNSAFE.getInt(0);
        }
    }

    public static void test2() {
        if (f) {
            // This branch is never executed but compiled due to -Xcomp
            UNSAFE.putInt(0, 0);
        }
    }

    private static int getAddress() {
        return 0;
    }

    public static void test3() {
        if (f) {
            // This branch is never executed but compiled due to -Xcomp
            UNSAFE.getInt(getAddress());
        }
    }

    public static void test4() {
        if (f) {
            // This branch is never executed but compiled due to -Xcomp
            UNSAFE.putInt(getAddress(), 0);
        }
    }

    static public void main(String[] args) {
        test1();
        test2();
        test3();
        test4();
    }
}