/*

 * Copyright (c) 2014, 2018, 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.

 */

package org.graalvm.compiler.hotspot.test;

import java.lang.reflect.Method;

import java.util.ArrayList;

import java.util.Arrays;

import java.util.Collection;

import java.util.Collections;

import java.util.Formatter;

import java.util.List;

import java.util.ServiceLoader;

import java.util.Set;

import java.util.TreeSet;

import java.util.stream.Collectors;

import jdk.internal.vm.compiler.collections.EconomicMap;

import jdk.internal.vm.compiler.collections.MapCursor;

import org.graalvm.compiler.api.test.Graal;

import org.graalvm.compiler.hotspot.GraalHotSpotVMConfig;

import org.graalvm.compiler.hotspot.HotSpotGraalRuntimeProvider;

import org.graalvm.compiler.hotspot.meta.HotSpotProviders;

import org.graalvm.compiler.nodes.graphbuilderconf.GraphBuilderConfiguration.Plugins;

import org.graalvm.compiler.nodes.graphbuilderconf.InvocationPlugin;

import org.graalvm.compiler.nodes.graphbuilderconf.InvocationPlugins;

import org.graalvm.compiler.nodes.graphbuilderconf.InvocationPlugins.Binding;

import org.graalvm.compiler.runtime.RuntimeProvider;

import org.graalvm.compiler.serviceprovider.GraalServices;

import org.graalvm.compiler.test.GraalTest;

import org.junit.Test;

import jdk.vm.ci.aarch64.AArch64;

import jdk.vm.ci.amd64.AMD64;

import jdk.vm.ci.code.Architecture;

import jdk.vm.ci.hotspot.HotSpotVMConfigStore;

import jdk.vm.ci.hotspot.VMIntrinsicMethod;

import jdk.vm.ci.meta.MetaAccessProvider;

import jdk.vm.ci.meta.MetaUtil;

import jdk.vm.ci.meta.MethodHandleAccessProvider.IntrinsicMethod;

import jdk.vm.ci.meta.ResolvedJavaMethod;

/**

 * Checks the intrinsics implemented by Graal against the set of intrinsics declared by HotSpot. The

 * purpose of this test is to detect when new intrinsics are added to HotSpot and process them

 * appropriately in Graal. This will be achieved by working through {@link #toBeInvestigated} and

 * either implementing the intrinsic or moving it to {@link #ignore} .

 */

public class CheckGraalIntrinsics extends GraalTest {

    public static boolean match(String type, Binding binding, VMIntrinsicMethod intrinsic) {

        if (intrinsic.name.equals(binding.name)) {

            if (intrinsic.descriptor.startsWith(binding.argumentsDescriptor)) {

                if (type.equals(intrinsic.declaringClass)) {

                    return true;

                }

            }

        }

        return false;

    }

    public static InvocationPlugin findPlugin(EconomicMap<String, List<Binding>> bindings, VMIntrinsicMethod intrinsic) {

        MapCursor<String, List<Binding>> cursor = bindings.getEntries();

        while (cursor.advance()) {

            // Match format of VMIntrinsicMethod.declaringClass

            String type = MetaUtil.internalNameToJava(cursor.getKey(), true, false).replace('.', '/');

            for (Binding binding : cursor.getValue()) {

                if (match(type, binding, intrinsic)) {

                    return binding.plugin;

                }

            }

        }

        return null;

    }

    public static ResolvedJavaMethod resolveIntrinsic(MetaAccessProvider metaAccess, VMIntrinsicMethod intrinsic) throws ClassNotFoundException {

        Class<?> c;

        try {

            c = Class.forName(intrinsic.declaringClass.replace('/', '.'), false, CheckGraalIntrinsics.class.getClassLoader());

        } catch (ClassNotFoundException ex) {

            try {

                Class.forName("javax.naming.Reference");

            } catch (ClassNotFoundException coreNamingMissing) {

                // if core JDK classes aren't found, we are probably running in a

                // JDK9 java.base environment and then missing class is OK

                return null;

            }

            throw ex;

        }

        for (Method javaMethod : c.getDeclaredMethods()) {

            if (javaMethod.getName().equals(intrinsic.name)) {

                ResolvedJavaMethod method = metaAccess.lookupJavaMethod(javaMethod);

                if (intrinsic.descriptor.equals("*")) {

                    // Signature polymorphic method - name match is enough

                    return method;

                } else {

                    if (method.getSignature().toMethodDescriptor().equals(intrinsic.descriptor)) {

                        return method;

                    }

                }

            }

        }

        return null;

    }

    /**

     * The HotSpot intrinsics that:

     * <ul>

     * <li>will never implemented by Graal (comments must explain why)</li>

     * <li>are implemented without {@link InvocationPlugin}s, or</li>

     * <li>whose {@link InvocationPlugin} registration is guarded by a condition that is false in

     * the current VM context.</li>

     * </ul>

     */

    public final Set<String> ignore = new TreeSet<>();

    /**

     * The HotSpot intrinsics whose {@link InvocationPlugin} registration is guarded by a condition

     * too complex to duplicate here.

     * </ul>

     */

    public final Set<String> complexGuard = new TreeSet<>();

    /**

     * The HotSpot intrinsics implemented downstream.

     * </ul>

     */

    public final Set<String> downstream = new TreeSet<>();

    /**

     * The HotSpot intrinsics yet to be implemented or moved to {@link #ignore}.

     */

    public final Set<String> toBeInvestigated = new TreeSet<>();

    private static Collection<String> add(Collection<String> c, String... elements) {

        String[] sorted = elements.clone();

        Arrays.sort(sorted);

        for (int i = 0; i < elements.length; i++) {

            if (!elements[i].equals(sorted[i])) {

                // Let's keep the list sorted for easier visual inspection

                fail("Element %d is out of order, \"%s\"", i, elements[i]);

            }

        }

        c.addAll(Arrays.asList(elements));

        return c;

    }

    public final HotSpotGraalRuntimeProvider rt = (HotSpotGraalRuntimeProvider) Graal.getRequiredCapability(RuntimeProvider.class);

    public final Architecture arch = rt.getHostBackend().getTarget().arch;

    public final GraalHotSpotVMConfig config = rt.getVMConfig();

    public CheckGraalIntrinsics() {

        // These are dead

        add(ignore,

                        "java/lang/Math.atan2(DD)D",

                        "jdk/internal/misc/Unsafe.park(ZJ)V",

                        "jdk/internal/misc/Unsafe.unpark(Ljava/lang/Object;)V",

                        "sun/misc/Unsafe.park(ZJ)V",

                        "sun/misc/Unsafe.prefetchRead(Ljava/lang/Object;J)V",

                        "sun/misc/Unsafe.prefetchReadStatic(Ljava/lang/Object;J)V",

                        "sun/misc/Unsafe.prefetchWrite(Ljava/lang/Object;J)V",

                        "sun/misc/Unsafe.prefetchWriteStatic(Ljava/lang/Object;J)V",

                        "sun/misc/Unsafe.unpark(Ljava/lang/Object;)V");

        // These only exist to assist escape analysis in C2

        add(ignore,

                        "java/lang/Throwable.fillInStackTrace()Ljava/lang/Throwable;");

        // These are only used for the security handling during stack walking

        add(ignore,

                        "java/lang/reflect/Method.invoke(Ljava/lang/Object;[Ljava/lang/Object;)Ljava/lang/Object;");

        // These are marker intrinsic ids only

        add(ignore,

                        "java/lang/invoke/MethodHandle.<compiledLambdaForm>*",

                        "java/lang/invoke/MethodHandle.invoke*");

        // These are implemented through lowering

        add(ignore,

                        "java/lang/ref/Reference.get()Ljava/lang/Object;");

        // These are only used by C1

        add(ignore,

                        "java/nio/Buffer.checkIndex(I)I");

        // These do general compiler optimizations and convert min/max to cmov instructions. We are

        // ignoring them as cmovs are not necessarily beneficial.

        add(ignore,

                        "java/lang/Math.max(II)I",

                        "java/lang/Math.min(II)I");

        // These are known to be implemented down stream

        add(downstream,

                        "java/lang/Integer.toString(I)Ljava/lang/String;",

                        "java/lang/String.<init>(Ljava/lang/String;)V",

                        "java/lang/StringBuffer.<init>()V",

                        "java/lang/StringBuffer.<init>(I)V",

                        "java/lang/StringBuffer.<init>(Ljava/lang/String;)V",

                        "java/lang/StringBuffer.append(C)Ljava/lang/StringBuffer;",

                        "java/lang/StringBuffer.append(I)Ljava/lang/StringBuffer;",

                        "java/lang/StringBuffer.append(Ljava/lang/String;)Ljava/lang/StringBuffer;",

                        "java/lang/StringBuffer.toString()Ljava/lang/String;",

                        "java/lang/StringBuilder.<init>()V",

                        "java/lang/StringBuilder.<init>(I)V",

                        "java/lang/StringBuilder.<init>(Ljava/lang/String;)V",

                        "java/lang/StringBuilder.append(C)Ljava/lang/StringBuilder;",

                        "java/lang/StringBuilder.append(I)Ljava/lang/StringBuilder;",

                        "java/lang/StringBuilder.append(Ljava/lang/String;)Ljava/lang/StringBuilder;",

                        "java/lang/StringBuilder.toString()Ljava/lang/String;",

                        "java/util/Arrays.copyOf([Ljava/lang/Object;ILjava/lang/Class;)[Ljava/lang/Object;",

                        "java/util/Arrays.copyOfRange([Ljava/lang/Object;IILjava/lang/Class;)[Ljava/lang/Object;");

        add(complexGuard,

                        "java/lang/Integer.bitCount(I)I",

                        "java/lang/Integer.numberOfLeadingZeros(I)I",

                        "java/lang/Integer.numberOfTrailingZeros(I)I",

                        "java/lang/Long.bitCount(J)I",

                        "java/lang/Long.numberOfLeadingZeros(J)I",

                        "java/lang/Long.numberOfTrailingZeros(J)I");

        // Relevant for Java flight recorder

        add(toBeInvestigated,

                        "oracle/jrockit/jfr/Timing.counterTime()J",

                        "oracle/jrockit/jfr/VMJFR.classID0(Ljava/lang/Class;)J",

                        "oracle/jrockit/jfr/VMJFR.threadID()I");

        add(toBeInvestigated,

                        // Similar to addExact

                        "java/lang/Math.negateExact(I)I",

                        // Similar to addExact

                        "java/lang/Math.negateExact(J)J",

                        // HotSpot MacroAssembler-based intrinsic

                        "java/lang/String.indexOf(Ljava/lang/String;)I",

                        // Can share most implementation parts with with

                        // Unsafe.allocateUninitializedArray0

                        "java/lang/reflect/Array.newArray(Ljava/lang/Class;I)Ljava/lang/Object;",

                        // HotSpot MacroAssembler-based intrinsic

                        "sun/nio/cs/ISO_8859_1$Encoder.encodeISOArray([CI[BII)I",

                        // Stub based intrinsics but implementation seems complex in C2

                        "sun/security/provider/DigestBase.implCompressMultiBlock([BII)I");

        // See JDK-8207146.

        String oopName = isJDK12OrHigher() ? "Reference" : "Object";

        if (isJDK9OrHigher()) {

            // Relevant for Java flight recorder

            add(toBeInvestigated,

                            "jdk/jfr/internal/JVM.counterTime()J",

                            "jdk/jfr/internal/JVM.getBufferWriter()Ljava/lang/Object;",

                            "jdk/jfr/internal/JVM.getClassId(Ljava/lang/Class;)J");

            add(toBeInvestigated,

                            // Some logic and a stub call

                            "com/sun/crypto/provider/CounterMode.implCrypt([BII[BI)I",

                            // Stub and very little logic

                            "com/sun/crypto/provider/GHASH.processBlocks([BII[J[J)V",

                            // HotSpot MacroAssembler-based intrinsic

                            "java/lang/Math.fma(DDD)D",

                            // HotSpot MacroAssembler-based intrinsic

                            "java/lang/Math.fma(FFF)F",

                            // Just check if the argument is a compile time constant

                            "java/lang/invoke/MethodHandleImpl.isCompileConstant(Ljava/lang/Object;)Z",

                            // Some logic and a runtime call

                            "java/util/ArraysSupport.vectorizedMismatch(Ljava/lang/Object;JLjava/lang/Object;JII)I",

                            // Only used as a marker for vectorization?

                            "java/util/stream/Streams$RangeIntSpliterator.forEachRemaining(Ljava/util/function/IntConsumer;)V",

                            // Only implemented on non-AMD64 platforms (some logic and runtime call)

                            "java/util/zip/Adler32.updateByteBuffer(IJII)I",

                            // Only implemented on non-AMD64 platforms (some logic and runtime call)

                            "java/util/zip/Adler32.updateBytes(I[BII)I",

                            // Emits a slow and a fast path and some dispatching logic

                            "jdk/internal/misc/Unsafe.allocateUninitializedArray0(Ljava/lang/Class;I)Ljava/lang/Object;",

                            // Control flow, deopts, and a cast

                            "jdk/internal/util/Preconditions.checkIndex(IILjava/util/function/BiFunction;)I",

                            // HotSpot MacroAssembler-based intrinsic

                            "sun/nio/cs/ISO_8859_1$Encoder.implEncodeISOArray([CI[BII)I",

                            // Runtime call and some complex compiler logic

                            "sun/security/provider/DigestBase.implCompressMultiBlock0([BII)I");

            /*

             * Per default, all these operations are mapped to some generic method for which we

             * already have compiler intrinsics. Performance-wise it would be better to support them

             * explicitly as the more generic method might be more restrictive and therefore slower

             * than necessary.

             */

            add(toBeInvestigated,

                            // Mapped to compareAndExchange*

                            "jdk/internal/misc/Unsafe.compareAndExchangeByteAcquire(Ljava/lang/Object;JBB)B",

                            "jdk/internal/misc/Unsafe.compareAndExchangeByteRelease(Ljava/lang/Object;JBB)B",

                            "jdk/internal/misc/Unsafe.compareAndExchangeIntAcquire(Ljava/lang/Object;JII)I",

                            "jdk/internal/misc/Unsafe.compareAndExchangeIntRelease(Ljava/lang/Object;JII)I",

                            "jdk/internal/misc/Unsafe.compareAndExchangeLongAcquire(Ljava/lang/Object;JJJ)J",

                            "jdk/internal/misc/Unsafe.compareAndExchangeLongRelease(Ljava/lang/Object;JJJ)J",

                            "jdk/internal/misc/Unsafe.compareAndExchange" + oopName + "Acquire(Ljava/lang/Object;JLjava/lang/Object;Ljava/lang/Object;)Ljava/lang/Object;",

                            "jdk/internal/misc/Unsafe.compareAndExchange" + oopName + "Release(Ljava/lang/Object;JLjava/lang/Object;Ljava/lang/Object;)Ljava/lang/Object;",

                            "jdk/internal/misc/Unsafe.compareAndExchangeShortAcquire(Ljava/lang/Object;JSS)S",

                            "jdk/internal/misc/Unsafe.compareAndExchangeShortRelease(Ljava/lang/Object;JSS)S",

                            // Mapped to compareAndSet*

                            "jdk/internal/misc/Unsafe.weakCompareAndSetByte(Ljava/lang/Object;JBB)Z",

                            "jdk/internal/misc/Unsafe.weakCompareAndSetByteAcquire(Ljava/lang/Object;JBB)Z",

                            "jdk/internal/misc/Unsafe.weakCompareAndSetBytePlain(Ljava/lang/Object;JBB)Z",

                            "jdk/internal/misc/Unsafe.weakCompareAndSetByteRelease(Ljava/lang/Object;JBB)Z",

                            "jdk/internal/misc/Unsafe.weakCompareAndSetInt(Ljava/lang/Object;JII)Z",

                            "jdk/internal/misc/Unsafe.weakCompareAndSetIntAcquire(Ljava/lang/Object;JII)Z",

                            "jdk/internal/misc/Unsafe.weakCompareAndSetIntPlain(Ljava/lang/Object;JII)Z",

                            "jdk/internal/misc/Unsafe.weakCompareAndSetIntRelease(Ljava/lang/Object;JII)Z",

                            "jdk/internal/misc/Unsafe.weakCompareAndSetLong(Ljava/lang/Object;JJJ)Z",

                            "jdk/internal/misc/Unsafe.weakCompareAndSetLongAcquire(Ljava/lang/Object;JJJ)Z",

                            "jdk/internal/misc/Unsafe.weakCompareAndSetLongPlain(Ljava/lang/Object;JJJ)Z",

                            "jdk/internal/misc/Unsafe.weakCompareAndSetLongRelease(Ljava/lang/Object;JJJ)Z",

                            "jdk/internal/misc/Unsafe.weakCompareAndSet" + oopName + "(Ljava/lang/Object;JLjava/lang/Object;Ljava/lang/Object;)Z",

                            "jdk/internal/misc/Unsafe.weakCompareAndSet" + oopName + "Acquire(Ljava/lang/Object;JLjava/lang/Object;Ljava/lang/Object;)Z",

                            "jdk/internal/misc/Unsafe.weakCompareAndSet" + oopName + "Plain(Ljava/lang/Object;JLjava/lang/Object;Ljava/lang/Object;)Z",

                            "jdk/internal/misc/Unsafe.weakCompareAndSet" + oopName + "Release(Ljava/lang/Object;JLjava/lang/Object;Ljava/lang/Object;)Z",

                            "jdk/internal/misc/Unsafe.weakCompareAndSetShort(Ljava/lang/Object;JSS)Z",

                            "jdk/internal/misc/Unsafe.weakCompareAndSetShortAcquire(Ljava/lang/Object;JSS)Z",

                            "jdk/internal/misc/Unsafe.weakCompareAndSetShortPlain(Ljava/lang/Object;JSS)Z",

                            "jdk/internal/misc/Unsafe.weakCompareAndSetShortRelease(Ljava/lang/Object;JSS)Z");

            // Compact string support - HotSpot MacroAssembler-based intrinsic or complex C2 logic.

            add(toBeInvestigated,

                            "java/lang/StringCoding.hasNegatives([BII)Z",

                            "java/lang/StringCoding.implEncodeISOArray([BI[BII)I",

                            "java/lang/StringLatin1.indexOf([B[B)I",

                            "java/lang/StringUTF16.getChar([BI)C",

                            "java/lang/StringUTF16.getChars([BII[CI)V",

                            "java/lang/StringUTF16.indexOf([BI[BII)I",

                            "java/lang/StringUTF16.indexOf([B[B)I",

                            "java/lang/StringUTF16.indexOfChar([BIII)I",

                            "java/lang/StringUTF16.indexOfLatin1([BI[BII)I",

                            "java/lang/StringUTF16.indexOfLatin1([B[B)I",

                            "java/lang/StringUTF16.putChar([BII)V",

                            "java/lang/StringUTF16.toBytes([CII)[B");

            // These are handled through an intrinsic for String.equals itself

            add(ignore,

                            "java/lang/StringLatin1.equals([B[B)Z",

                            "java/lang/StringUTF16.equals([B[B)Z");

        }

        if (isJDK10OrHigher()) {

            add(toBeInvestigated,

                            "java/lang/Math.multiplyHigh(JJ)J",

                            "jdk/internal/util/ArraysSupport.vectorizedMismatch(Ljava/lang/Object;JLjava/lang/Object;JII)I");

        }

        if (isJDK11OrHigher()) {

            // Relevant for Java flight recorder

            add(toBeInvestigated,

                            "java/util/Base64$Encoder.encodeBlock([BII[BIZ)V",

                            "jdk/jfr/internal/JVM.getEventWriter()Ljava/lang/Object;");

        }

        if (!config.inlineNotify()) {

            add(ignore, "java/lang/Object.notify()V");

        }

        if (!config.inlineNotifyAll()) {

            add(ignore, "java/lang/Object.notifyAll()V");

        }

        if (!(arch instanceof AMD64)) {

            // Can we implement these on non-AMD64 platforms? C2 seems to.

            add(toBeInvestigated,

                            "java/lang/String.compareTo(Ljava/lang/String;)I",

                            "java/lang/StringLatin1.inflate([BI[BII)V",

                            "java/lang/StringLatin1.inflate([BI[CII)V",

                            "java/lang/StringUTF16.compress([BI[BII)I",

                            "java/lang/StringUTF16.compress([CI[BII)I",

                            "jdk/internal/misc/Unsafe.compareAndExchangeByte(Ljava/lang/Object;JBB)B",

                            "jdk/internal/misc/Unsafe.compareAndExchangeShort(Ljava/lang/Object;JSS)S",

                            "jdk/internal/misc/Unsafe.compareAndSetByte(Ljava/lang/Object;JBB)Z",

                            "jdk/internal/misc/Unsafe.compareAndSetShort(Ljava/lang/Object;JSS)Z",

                            "jdk/internal/misc/Unsafe.getAndAddByte(Ljava/lang/Object;JB)B",

                            "jdk/internal/misc/Unsafe.getAndAddShort(Ljava/lang/Object;JS)S",

                            "jdk/internal/misc/Unsafe.getAndSetByte(Ljava/lang/Object;JB)B",

                            "jdk/internal/misc/Unsafe.getAndSetShort(Ljava/lang/Object;JS)S",

                            "sun/misc/Unsafe.getAndAddInt(Ljava/lang/Object;JI)I",

                            "sun/misc/Unsafe.getAndAddLong(Ljava/lang/Object;JJ)J",

                            "sun/misc/Unsafe.getAndSetInt(Ljava/lang/Object;JI)I",

                            "sun/misc/Unsafe.getAndSetLong(Ljava/lang/Object;JJ)J",

                            "sun/misc/Unsafe.getAndSet" + oopName + "(Ljava/lang/Object;JLjava/lang/Object;)Ljava/lang/Object;");

            if (isJDK9OrHigher()) {

                if (!(arch instanceof AArch64)) {

                    add(toBeInvestigated,

                                    "java/lang/StringLatin1.compareTo([B[B)I",

                                    "java/lang/StringLatin1.compareToUTF16([B[B)I",

                                    "java/lang/StringUTF16.compareTo([B[B)I",

                                    "java/lang/StringUTF16.compareToLatin1([B[B)I",

                                    "jdk/internal/misc/Unsafe.getAndAddInt(Ljava/lang/Object;JI)I",

                                    "jdk/internal/misc/Unsafe.getAndAddLong(Ljava/lang/Object;JJ)J",

                                    "jdk/internal/misc/Unsafe.getAndSetInt(Ljava/lang/Object;JI)I",

                                    "jdk/internal/misc/Unsafe.getAndSetLong(Ljava/lang/Object;JJ)J",

                                    "jdk/internal/misc/Unsafe.getAndSet" + oopName + "(Ljava/lang/Object;JLjava/lang/Object;)Ljava/lang/Object;");

                }

                add(toBeInvestigated,

                                "java/lang/Thread.onSpinWait()V",

                                "jdk/internal/misc/Unsafe.getCharUnaligned(Ljava/lang/Object;J)C",

                                "jdk/internal/misc/Unsafe.getIntUnaligned(Ljava/lang/Object;J)I",

                                "jdk/internal/misc/Unsafe.getLongUnaligned(Ljava/lang/Object;J)J",

                                "jdk/internal/misc/Unsafe.getShortUnaligned(Ljava/lang/Object;J)S",

                                "jdk/internal/misc/Unsafe.putCharUnaligned(Ljava/lang/Object;JC)V",

                                "jdk/internal/misc/Unsafe.putIntUnaligned(Ljava/lang/Object;JI)V",

                                "jdk/internal/misc/Unsafe.putLongUnaligned(Ljava/lang/Object;JJ)V",

                                "jdk/internal/misc/Unsafe.putShortUnaligned(Ljava/lang/Object;JS)V");

            }

        }

        /*

         * The intrinsics down here are known to be implemented but they are not always enabled on

         * the HotSpot side (e.g., because they require certain CPU features). So, we are ignoring

         * them if the HotSpot config tells us that they can't be used.

         */

        // CRC32 intrinsics

        if (!config.useCRC32Intrinsics) {

            add(ignore, "java/util/zip/CRC32.update(II)I");

            if (isJDK9OrHigher()) {

                add(ignore,

                                "java/util/zip/CRC32.updateByteBuffer0(IJII)I",

                                "java/util/zip/CRC32.updateBytes0(I[BII)I");

            } else {

                add(ignore,

                                "java/util/zip/CRC32.updateByteBuffer(IJII)I",

                                "java/util/zip/CRC32.updateBytes(I[BII)I");

            }

        }

        // CRC32C intrinsics

        if (!config.useCRC32CIntrinsics) {

            add(ignore,

                            "java/util/zip/CRC32C.updateBytes(I[BII)I",

                            "java/util/zip/CRC32C.updateDirectByteBuffer(IJII)I");

        }

        // AES intrinsics

        if (!config.useAESIntrinsics) {

            if (isJDK9OrHigher()) {

                add(ignore,

                                "com/sun/crypto/provider/AESCrypt.implDecryptBlock([BI[BI)V",

                                "com/sun/crypto/provider/AESCrypt.implEncryptBlock([BI[BI)V",

                                "com/sun/crypto/provider/CipherBlockChaining.implDecrypt([BII[BI)I",

                                "com/sun/crypto/provider/CipherBlockChaining.implEncrypt([BII[BI)I");

            } else {

                add(ignore,

                                "com/sun/crypto/provider/AESCrypt.decryptBlock([BI[BI)V",

                                "com/sun/crypto/provider/AESCrypt.encryptBlock([BI[BI)V",

                                "com/sun/crypto/provider/CipherBlockChaining.decrypt([BII[BI)I",

                                "com/sun/crypto/provider/CipherBlockChaining.encrypt([BII[BI)I");

            }

        }

        // BigInteger intrinsics

        if (!config.useMultiplyToLenIntrinsic()) {

            if (isJDK9OrHigher()) {

                add(ignore, "java/math/BigInteger.implMultiplyToLen([II[II[I)[I");

            } else {

                add(ignore, "java/math/BigInteger.multiplyToLen([II[II[I)[I");

            }

        }

        if (!config.useMulAddIntrinsic()) {

            add(ignore, "java/math/BigInteger.implMulAdd([I[IIII)I");

        }

        if (!config.useMontgomeryMultiplyIntrinsic()) {

            add(ignore, "java/math/BigInteger.implMontgomeryMultiply([I[I[IIJ[I)[I");