/*

 * Copyright (c) 2012, 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

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package org.graalvm.compiler.hotspot.amd64;

import org.graalvm.compiler.asm.amd64.AMD64MacroAssembler;

import org.graalvm.compiler.hotspot.GraalHotSpotVMConfig;

import org.graalvm.compiler.lir.LIRFrameState;

import org.graalvm.compiler.lir.LIRInstructionClass;

import org.graalvm.compiler.lir.Opcode;

import org.graalvm.compiler.lir.amd64.AMD64Call.DirectCallOp;

import org.graalvm.compiler.lir.asm.CompilationResultBuilder;

import org.graalvm.compiler.nodes.CallTargetNode.InvokeKind;

import jdk.vm.ci.amd64.AMD64;

import jdk.vm.ci.meta.ResolvedJavaMethod;

import jdk.vm.ci.meta.Value;

/**

 * A direct call that complies with the conventions for such calls in HotSpot. In particular, for

 * calls using an inline cache, a MOVE instruction is emitted just prior to the aligned direct call.

 */

@Opcode("CALL_DIRECT")

final class AMD64HotspotDirectVirtualCallOp extends DirectCallOp {

    public static final LIRInstructionClass<AMD64HotspotDirectVirtualCallOp> TYPE = LIRInstructionClass.create(AMD64HotspotDirectVirtualCallOp.class);

    private final InvokeKind invokeKind;

    private final GraalHotSpotVMConfig config;

    AMD64HotspotDirectVirtualCallOp(ResolvedJavaMethod target, Value result, Value[] parameters, Value[] temps, LIRFrameState state, InvokeKind invokeKind, GraalHotSpotVMConfig config) {

        super(TYPE, target, result, parameters, temps, state);

        this.invokeKind = invokeKind;

        this.config = config;

        assert invokeKind.isIndirect();

    }

    @Override

    public void emitCode(CompilationResultBuilder crb, AMD64MacroAssembler masm) {

        // The mark for an invocation that uses an inline cache must be placed at the

        // instruction that loads the Klass from the inline cache.

        crb.recordMark(invokeKind == InvokeKind.Virtual ? config.MARKID_INVOKEVIRTUAL : config.MARKID_INVOKEINTERFACE);

        // This must be emitted exactly like this to ensure it's patchable

        masm.movq(AMD64.rax, config.nonOopBits);

        int offset = super.emitCall(crb, masm);

        crb.recordInvokeVirtualOrInterfaceCallOp(offset, getPosition());

    }

}