JDK14/Java14源码在线阅读

/*
 * Copyright (c) 2015, 2018, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * 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.
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package org.graalvm.compiler.core.sparc;

import org.graalvm.compiler.asm.sparc.SPARCAssembler;
import org.graalvm.compiler.core.common.LIRKind;
import org.graalvm.compiler.graph.NodeClass;
import org.graalvm.compiler.lir.sparc.SPARCImmediateAddressValue;
import org.graalvm.compiler.nodeinfo.NodeInfo;
import org.graalvm.compiler.nodes.NodeView;
import org.graalvm.compiler.nodes.ValueNode;
import org.graalvm.compiler.nodes.memory.address.AddressNode;
import org.graalvm.compiler.nodes.spi.LIRLowerable;
import org.graalvm.compiler.nodes.spi.NodeLIRBuilderTool;

import jdk.vm.ci.meta.AllocatableValue;

/**
 * Represents an address of the form [base + simm13].
 */
@NodeInfo
public class SPARCImmediateAddressNode extends AddressNode implements LIRLowerable {

    public static final NodeClass<SPARCImmediateAddressNode> TYPE = NodeClass.create(SPARCImmediateAddressNode.class);

    @Input private ValueNode base;
    private int displacement;

    public SPARCImmediateAddressNode(ValueNode base, int displacement) {
        super(TYPE);
        assert SPARCAssembler.isSimm13(displacement);
        this.base = base;
        this.displacement = displacement;
    }

    @Override
    public void generate(NodeLIRBuilderTool gen) {
        SPARCLIRGenerator tool = (SPARCLIRGenerator) gen.getLIRGeneratorTool();

        AllocatableValue baseValue = tool.asAllocatable(gen.operand(base));

        LIRKind kind = tool.getLIRKind(stamp(NodeView.DEFAULT));
        AllocatableValue baseReference = LIRKind.derivedBaseFromValue(baseValue);
        if (baseReference != null) {
            kind = kind.makeDerivedReference(baseReference);
        }


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