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 * Copyright (c) 2014, 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.Executable;
import java.util.concurrent.Callable;

/**
 * @test ConstantGettersTransitionsTest
 * @library /testlibrary /testlibrary/whitebox /compiler/whitebox
 * @build TransitionsTestExecutor ConstantGettersTransitionsTest
 * @run main ClassFileInstaller sun.hotspot.WhiteBox sun.hotspot.WhiteBox$WhiteBoxPermission
 * @run main/othervm/timeout=240 -Xmixed -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions
 *                   -XX:+WhiteBoxAPI -XX:+TieredCompilation
 *                   -XX:CompileCommand=compileonly,ConstantGettersTestCase$TrivialMethods::*
 *                   TransitionsTestExecutor ConstantGettersTransitionsTest
 * @summary Test the correctness of compilation level transitions for constant getters methods
 */
public class ConstantGettersTransitionsTest extends LevelTransitionTest {
    public static void main(String[] args) {
        assert (!CompilerWhiteBoxTest.skipOnTieredCompilation(false));

        // run test cases
        for (TestCase testCase : ConstantGettersTestCase.values()) {
            new ConstantGettersTransitionsTest(testCase).runTest();
        }
    }

    @Override
    protected boolean isTrivial() {
        return true;
    }

    private ConstantGettersTransitionsTest(TestCase testCase) {
        super(testCase);
    }
}

enum ConstantGettersTestCase implements CompilerWhiteBoxTest.TestCase {
    ICONST_M1,
    ICONST_0,
    ICONST_1,
    ICONST_2,
    ICONST_3,
    ICONST_4,
    ICONST_5,
    LCONST_0,
    LCONST_1,
    FCONST_0,
    FCONST_1,
    FCONST_2,
    DCONST_0,
    DCONST_1,
    DCONST_W,
    BYTE,
    SHORT,
    CHAR;

    private final Executable executable;
    private final Callable<Integer> callable;

    @Override
    public Executable getExecutable() {
        return executable;
    }

    @Override
    public Callable<Integer> getCallable() {
        return callable;
    }

    @Override
    public boolean isOsr() {
        return false;
    }

    private ConstantGettersTestCase() {
        String name = "make" + this.name();
        this.executable = LevelTransitionTest.Helper.getMethod(TrivialMethods.class, name);
        this.callable = LevelTransitionTest.Helper.getCallable(new TrivialMethods(), name);
    }

    /**
     * Contains methods that load constants with certain types of bytecodes
     * See JVMS 2.11.2. Load and Store Instructions
     * Note that it doesn't have a method for ldc_w instruction
     */
    private static class TrivialMethods {
        public static int makeICONST_M1() {
            return -1;
        }

        public static int makeICONST_0() {
            return 0;
        }

        public static int makeICONST_1() {
            return 1;
        }

        public static int makeICONST_2() {
            return 2;
        }

        public static int makeICONST_3() {
            return 3;
        }

        public static int makeICONST_4() {
            return 4;
        }

        public static int makeICONST_5() {
            return 5;
        }

        public static long makeLCONST_0() {
            return 0L;
        }

        public static long makeLCONST_1() {
            return 1L;
        }

        public static float makeFCONST_0() {
            return 0F;
        }

        public static float makeFCONST_1() {
            return 1F;
        }

        public static float makeFCONST_2() {
            return 2F;
        }

        public static double makeDCONST_0() {
            return 0D;
        }

        public static double makeDCONST_1() {
            return 1D;
        }

        public static double makeDCONST_W() {
            // ldc2_w
            return Double.MAX_VALUE;
        }

        public static Object makeOBJECT() {
            // aconst_null
            return null;
        }

        public static byte makeBYTE() {
            // bipush
            return (byte) 0x7F;
        }

        public static short makeSHORT() {
            // sipush
            return (short) 0x7FFF;
        }

        public static char makeCHAR() {
            // ldc
            return (char) 0xFFFF;
        }

        public static boolean makeBOOLEAN() {
            return true;
        }
    }
}