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 * Copyright (c) 2012, 2017, 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.hotspot;

import org.graalvm.compiler.core.common.LIRKind;

import org.graalvm.compiler.debug.GraalError;

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

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

import org.graalvm.compiler.hotspot.nodes.GraalHotSpotVMConfigNode;

import org.graalvm.compiler.hotspot.nodes.aot.LoadConstantIndirectlyNode;

import org.graalvm.compiler.hotspot.nodes.aot.ResolveConstantNode;

import org.graalvm.compiler.hotspot.nodes.aot.ResolveMethodAndLoadCountersNode;

import org.graalvm.compiler.hotspot.nodes.profiling.RandomSeedNode;

import org.graalvm.compiler.hotspot.replacements.EncodedSymbolConstant;

import org.graalvm.compiler.lir.LIRFrameState;

import org.graalvm.compiler.lir.VirtualStackSlot;

import org.graalvm.compiler.lir.gen.LIRGenerator;

import org.graalvm.compiler.lir.gen.LIRGeneratorTool;

import jdk.vm.ci.hotspot.HotSpotMetaspaceConstant;

import jdk.vm.ci.hotspot.HotSpotObjectConstant;

import jdk.vm.ci.meta.Constant;

import jdk.vm.ci.meta.DeoptimizationAction;

import jdk.vm.ci.meta.DeoptimizationReason;

import jdk.vm.ci.meta.ResolvedJavaMethod;

import jdk.vm.ci.meta.Value;

/**

 * This interface defines the contract a HotSpot backend LIR generator needs to fulfill in addition

 * to abstract methods from {@link LIRGenerator} and {@link LIRGeneratorTool}.

 */

public interface HotSpotLIRGenerator extends LIRGeneratorTool {

    /**

     * Emits an operation to make a tail call.

     *

     * @param args the arguments of the call

     * @param address the target address of the call

     */

    void emitTailcall(Value[] args, Value address);

    void emitDeoptimizeCaller(DeoptimizationAction action, DeoptimizationReason reason);

    /**

     * Emits code for a {@link LoadConstantIndirectlyNode}.

     *

     * @param constant

     * @return value of loaded address in register

     */

    default Value emitLoadObjectAddress(Constant constant) {

        throw new GraalError("Emitting code to load an object address is not currently supported on %s", target().arch);

    }

    /**

     * Emits code for a {@link LoadConstantIndirectlyNode}.

     *

     * @param constant original constant

     * @param action action to perform on the metaspace object

     * @return Value of loaded address in register

     */

    default Value emitLoadMetaspaceAddress(Constant constant, HotSpotConstantLoadAction action) {

        throw new GraalError("Emitting code to load a metaspace address is not currently supported on %s", target().arch);

    }

    /**

     * Emits code for a {@link GraalHotSpotVMConfigNode}.

     *

     * @param markId id of the value to load

     * @param kind type of the value to load

     * @return value of loaded global in register

     */

    default Value emitLoadConfigValue(int markId, LIRKind kind) {

        throw new GraalError("Emitting code to load a config value is not currently supported on %s", target().arch);

    }

    /**

     * Emits code for a {@link ResolveConstantNode} to resolve a {@link HotSpotObjectConstant}.

     *

     * @param constant original constant

     * @param constantDescription a description of the string that need to be materialized (and

     *            interned) as java.lang.String, generated with {@link EncodedSymbolConstant}

     * @param frameState frame state for the runtime call

     * @return the address of the requested constant.

     */

    default Value emitObjectConstantRetrieval(Constant constant, Value constantDescription, LIRFrameState frameState) {

        throw new GraalError("Emitting code to resolve an object constant is not currently supported on %s", target().arch);

    }

    /**

     * Emits code to resolve a dynamic constant.

     *

     * @param constant original constant

     * @param frameState frame state for the runtime call

     * @return the address of the requested constant.

     */

    default Value emitResolveDynamicInvoke(Constant constant, LIRFrameState frameState) {

        throw new GraalError("Emitting code to resolve a dynamic constant is not currently supported on %s", target().arch);

    }

    /**

     * Emits code for a {@link ResolveConstantNode} to resolve a {@link HotSpotMetaspaceConstant}.

     *

     * @param constant original constant

     * @param constantDescription a symbolic description of the {@link HotSpotMetaspaceConstant}

     *            generated by {@link EncodedSymbolConstant}

     * @param frameState frame state for the runtime call

     * @return the address of the requested constant.

     */

    default Value emitMetaspaceConstantRetrieval(Constant constant, Value constantDescription, LIRFrameState frameState) {

        throw new GraalError("Emitting code to resolve a metaspace constant is not currently supported on %s", target().arch);

    }

    /**

     * Emits code for a {@link ResolveMethodAndLoadCountersNode} to resolve a

     * {@link HotSpotMetaspaceConstant} that represents a {@link ResolvedJavaMethod} and return the

     * corresponding MethodCounters object.

     *

     * @param method original constant

     * @param klassHint a klass in which the method is declared

     * @param methodDescription is symbolic description of the constant generated by

     *            {@link EncodedSymbolConstant}

     * @param frameState frame state for the runtime call

     * @return the address of the requested constant.

     */

    default Value emitResolveMethodAndLoadCounters(Constant method, Value klassHint, Value methodDescription, LIRFrameState frameState) {

        throw new GraalError("Emitting code to resolve a method and load counters is not currently supported on %s", target().arch);

    }

    /**

     * Emits code for a {@link ResolveConstantNode} to resolve a klass

     * {@link HotSpotMetaspaceConstant} and run static initializer.

     *

     *

     * @param constant original constant

     * @param constantDescription a symbolic description of the {@link HotSpotMetaspaceConstant}

     *            generated by {@link EncodedSymbolConstant}

     * @param frameState frame state for the runtime call

     * @return the address of the requested constant.

     */

    default Value emitKlassInitializationAndRetrieval(Constant constant, Value constantDescription, LIRFrameState frameState) {

        throw new GraalError("Emitting code to initialize a class is not currently supported on %s", target().arch);

    }

    /**

     * Emits code for a {@link RandomSeedNode}.

     *

     * @return value of the counter

     */

    default Value emitRandomSeed() {

        throw new GraalError("Emitting code to return a random seed is not currently supported on %s", target().arch);

    }

    /**

     * Gets a stack slot for a lock at a given lock nesting depth.

     */

    VirtualStackSlot getLockSlot(int lockDepth);

    @Override

    HotSpotProviders getProviders();

}