src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.core.test/src/org/graalvm/compiler/core/test/NarrowingReadTest.java

/*
 * Copyright (c) 2016, 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
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 */


package org.graalvm.compiler.core.test;

import org.junit.Test;

/**
 * Sometimes it's possible to emit a smaller read from a larger memory location instead reading the
 * whole thing and truncating it. Make sure it returns the right value.
 */
public class NarrowingReadTest extends GraalCompilerTest {

    public byte testNarrowReadSnippetByte(Long l) {
        return (byte) l.longValue();
    }

    @Test
    public void testNarrowReadByte() {
        test("testNarrowReadSnippetByte", Long.valueOf(Byte.MAX_VALUE));
    }

    public short testNarrowReadSnippetShort(Long l) {
        return (short) l.longValue();
    }

    @Test
    public void testNarrowReadShort() {
        test("testNarrowReadSnippetShort", Long.valueOf(Short.MAX_VALUE));
    }

    public int testNarrowReadSnippetInt(Long l) {
        return (int) l.longValue();
    }

    @Test
    public void testNarrowReadInt() {
        test("testNarrowReadSnippetInt", Long.valueOf(Integer.MAX_VALUE));
    }

    public long testNarrowReadSnippetIntToLong(Long l) {
        return (int) l.longValue();
    }

    @Test
    public void testNarrowReadIntToLong() {
        test("testNarrowReadSnippetIntToLong", Long.valueOf(Integer.MAX_VALUE));
    }
}