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 * 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.replacements.test;

import java.util.HashMap;

import org.graalvm.compiler.api.replacements.MethodSubstitution;

import org.graalvm.compiler.nodes.IfNode;

import org.graalvm.compiler.nodes.StructuredGraph;

import org.graalvm.compiler.nodes.calc.AbsNode;

import org.graalvm.compiler.nodes.calc.ReinterpretNode;

import org.graalvm.compiler.replacements.nodes.BitCountNode;

import org.graalvm.compiler.replacements.nodes.BitScanForwardNode;

import org.graalvm.compiler.replacements.nodes.BitScanReverseNode;

import org.graalvm.compiler.replacements.nodes.ReverseBytesNode;

import org.junit.Test;

import jdk.vm.ci.code.InstalledCode;

import jdk.vm.ci.meta.ResolvedJavaMethod;

/**

 * Tests the VM independent {@link MethodSubstitution}s.

 */

public class StandardMethodSubstitutionsTest extends MethodSubstitutionTest {

    @Test

    public void testMathSubstitutions() {

        assertInGraph(assertNotInGraph(testGraph("mathAbs"), IfNode.class), AbsNode.class);     // Java

        double value = 34567.891D;

        testGraph("mathCos");

        testGraph("mathLog");

        testGraph("mathLog10");

        testGraph("mathSin");

        testGraph("mathSqrt");

        testGraph("mathTan");

        testGraph("mathAll");

        test("mathCos", value);

        test("mathLog", value);

        test("mathLog10", value);

        test("mathSin", value);

        test("mathSqrt", value);

        test("mathTan", value);

        test("mathAll", value);

    }

    @Test

    public void testMathPow() {

        double a = 34567.891D;

        double b = 4.6D;

        test("mathPow", a, b);

        // Test the values directly handled by the substitution

        // If the second argument is positive or negative zero, then the result is 1.0.

        test("mathPow", a, 0.0D);

        test("mathPow", a, -0.0D);

        // If the second argument is 1.0, then the result is the same as the first argument.

        test("mathPow", a, 1.0D);

        // If the second argument is NaN, then the result is NaN.

        test("mathPow", a, Double.NaN);

        // If the first argument is NaN and the second argument is nonzero, then the result is NaN.

        test("mathPow", Double.NaN, b);

        test("mathPow", Double.NaN, 0.0D);

        // x**-1 = 1/x

        test("mathPow", a, -1.0D);

        // x**2 = x*x

        test("mathPow", a, 2.0D);

        // x**0.5 = sqrt(x)

        test("mathPow", a, 0.5D);

    }

    public static double mathPow(double a, double b) {

        return mathPow0(a, b);

    }

    public static double mathPow0(double a, double b) {

        return Math.pow(a, b);

    }

    public static double mathAbs(double value) {

        return Math.abs(value);

    }

    public static double mathSqrt(double value) {

        return Math.sqrt(value);

    }

    public static double mathLog(double value) {

        return Math.log(value);

    }

    public static double mathLog10(double value) {

        return Math.log10(value);

    }

    public static double mathSin(double value) {

        return Math.sin(value);

    }

    public static double mathCos(double value) {

        return Math.cos(value);

    }

    public static double mathTan(double value) {

        return Math.tan(value);

    }

    public static double mathAll(double value) {

        return Math.sqrt(value) + Math.log(value) + Math.log10(value) + Math.sin(value) + Math.cos(value) + Math.tan(value);

    }

        ResolvedJavaMethod realJavaMethod = getResolvedJavaMethod(holder, methodName);

        ResolvedJavaMethod testJavaMethod = getResolvedJavaMethod(testMethodName);

        StructuredGraph graph = testGraph(testMethodName);

        // Check to see if the resulting graph contains the expected node

        StructuredGraph replacement = getReplacements().getSubstitution(realJavaMethod, -1, false, null, graph.getOptions());

        if (replacement == null && !optional) {

        }

        for (Object l : args) {

            // Force compilation

            InstalledCode code = getCode(testJavaMethod);

            assert optional || code != null;

            // Verify that the original method and the substitution produce the same value

            Object expected = invokeSafe(realJavaMethod, null, l);

            assertDeepEquals(expected, invokeSafe(testJavaMethod, null, l));

            // Verify that the generated code and the original produce the same value

            assertDeepEquals(expected, executeVarargsSafe(code, l));

        }

    }

    @Test

    public void testCharSubstitutions() {

        Object[] args = new Character[]{Character.MIN_VALUE, (char) -1, (char) 0, (char) 1, Character.MAX_VALUE};

    }

    public static char charReverseBytes(char value) {

        return Character.reverseBytes(value);

    }

    @Test

    public void testCharSubstitutionsNarrowing() {

        Object[] args = new Integer[]{(int) Character.MIN_VALUE, -1, 0, 1, (int) Character.MAX_VALUE};

        for (Object arg : args) {

            test("charReverseBytesNarrowing", arg);

        }

    }

    public static char charReverseBytesNarrowing(int value) {

        return Character.reverseBytes((char) value);

    }

    @Test

    public void testShortSubstitutions() {

        Object[] args = new Short[]{Short.MIN_VALUE, -1, 0, 1, Short.MAX_VALUE};

    }

    public static short shortReverseBytes(short value) {

        return Short.reverseBytes(value);

    }

    @Test

    public void testShortSubstitutionsNarrowing() {

        Object[] args = new Integer[]{(int) Short.MIN_VALUE, -1, 0, 1, (int) Short.MAX_VALUE};

        for (Object arg : args) {

            test("shortReverseBytesNarrowing", arg);

        }

    }

    public static short shortReverseBytesNarrowing(int value) {

        return Short.reverseBytes((short) value);

    }

    @Test

    public void testIntegerSubstitutions() {

        Object[] args = new Object[]{Integer.MIN_VALUE, -1, 0, 1, Integer.MAX_VALUE};

    }

    public static int integerReverseBytes(int value) {

        return Integer.reverseBytes(value);

    }

    public static int integerNumberOfLeadingZeros(int value) {

        return Integer.numberOfLeadingZeros(value);

    }

    public static int integerNumberOfTrailingZeros(int value) {

        return Integer.numberOfTrailingZeros(value);

    }

    public static int integerBitCount(int value) {

        return Integer.bitCount(value);

    }

    @Test

    public void testLongSubstitutions() {

        Object[] args = new Object[]{Long.MIN_VALUE, -1L, 0L, 1L, Long.MAX_VALUE};

    }

    public static long longReverseBytes(long value) {

        return Long.reverseBytes(value);

    }

    public static int longNumberOfLeadingZeros(long value) {

        return Long.numberOfLeadingZeros(value);

    }

    public static int longNumberOfTrailingZeros(long value) {

        return Long.numberOfTrailingZeros(value);

    }

    public static int longBitCount(long value) {

        return Long.bitCount(value);

    }

    @Test

    public void testFloatSubstitutions() {

        assertInGraph(testGraph("floatToIntBits"), ReinterpretNode.class); // Java

        testGraph("intBitsToFloat");

    }

    public static int floatToIntBits(float value) {

        return Float.floatToIntBits(value);

    }

    public static float intBitsToFloat(int value) {

        return Float.intBitsToFloat(value);

    }

    @Test

    public void testDoubleSubstitutions() {

        assertInGraph(testGraph("doubleToLongBits"), ReinterpretNode.class); // Java

        testGraph("longBitsToDouble");

    }

    public static long doubleToLongBits(double value) {

        return Double.doubleToLongBits(value);

    }

    public static double longBitsToDouble(long value) {

        return Double.longBitsToDouble(value);

    }

    public static boolean isInstance(Class<?> clazz, Object object) {

        return clazz.isInstance(object);

    }

    public static boolean isInstance2(boolean cond, Object object) {

        Class<?> clazz;

        if (cond) {

            clazz = String.class;

        } else {

            clazz = java.util.HashMap.class;

        }

        return clazz.isInstance(object);

    }

    public static boolean isAssignableFrom(Class<?> clazz, Class<?> other) {

        return clazz.isAssignableFrom(other);

    }

    @Test

    public void testClassSubstitutions() {

        testGraph("isInstance");

        testGraph("isInstance2");

        testGraph("isAssignableFrom");

        for (Class<?> c : new Class<?>[]{getClass(), Cloneable.class, int[].class, String[][].class}) {

            for (Object o : new Object[]{this, new int[5], new String[2][], new Object()}) {

                test("isInstance", c, o);

                test("isAssignableFrom", c, o.getClass());

            }

        }

        test("isInstance2", true, null);

        test("isInstance2", false, null);

        test("isInstance2", true, "string");

        test("isInstance2", false, "string");

        test("isInstance2", true, new HashMap<>());

        test("isInstance2", false, new HashMap<>());

    }

}