43972
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/*
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* Copyright (c) 2015, 2015, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package org.graalvm.compiler.hotspot.amd64;
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import org.graalvm.compiler.asm.amd64.AMD64Address;
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import org.graalvm.compiler.asm.amd64.AMD64MacroAssembler;
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import org.graalvm.compiler.lir.LIRInstructionClass;
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import org.graalvm.compiler.lir.LabelRef;
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import org.graalvm.compiler.lir.SwitchStrategy;
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import org.graalvm.compiler.lir.amd64.AMD64ControlFlow;
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import org.graalvm.compiler.lir.asm.CompilationResultBuilder;
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import jdk.vm.ci.code.Register;
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import jdk.vm.ci.code.ValueUtil;
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import jdk.vm.ci.hotspot.HotSpotMetaspaceConstant;
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import jdk.vm.ci.meta.Constant;
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import jdk.vm.ci.meta.Value;
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final class AMD64HotSpotStrategySwitchOp extends AMD64ControlFlow.StrategySwitchOp {
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public static final LIRInstructionClass<AMD64HotSpotStrategySwitchOp> TYPE = LIRInstructionClass.create(AMD64HotSpotStrategySwitchOp.class);
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AMD64HotSpotStrategySwitchOp(SwitchStrategy strategy, LabelRef[] keyTargets, LabelRef defaultTarget, Value key, Value scratch) {
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super(TYPE, strategy, keyTargets, defaultTarget, key, scratch);
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}
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@Override
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public void emitCode(final CompilationResultBuilder crb, final AMD64MacroAssembler masm) {
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strategy.run(new HotSpotSwitchClosure(ValueUtil.asRegister(key), crb, masm));
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}
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public class HotSpotSwitchClosure extends SwitchClosure {
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protected HotSpotSwitchClosure(Register keyRegister, CompilationResultBuilder crb, AMD64MacroAssembler masm) {
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super(keyRegister, crb, masm);
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}
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@Override
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protected void emitComparison(Constant c) {
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if (c instanceof HotSpotMetaspaceConstant) {
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HotSpotMetaspaceConstant meta = (HotSpotMetaspaceConstant) c;
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if (meta.isCompressed()) {
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crb.recordInlineDataInCode(meta);
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masm.cmpl(keyRegister, 0xDEADDEAD);
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} else {
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AMD64Address addr = (AMD64Address) crb.recordDataReferenceInCode(meta, 8);
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masm.cmpq(keyRegister, addr);
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}
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} else {
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super.emitComparison(c);
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}
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}
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}
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}
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