hotspot/src/jdk.vm.compiler/share/classes/org.graalvm.compiler.hotspot.amd64/src/org/graalvm/compiler/hotspot/amd64/AMD64HotSpotBackend.java
author iveresov
Tue, 10 Jan 2017 21:39:20 +0300
changeset 43435 01521491ec10
parent 42649 28238583a459
permissions -rw-r--r--
8172310: [AOT] Fix unverified entry point Summary: Fix AOT code for the unverified entry point Reviewed-by: kvn
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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/*
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 * Copyright (c) 2012, 2016, 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 static org.graalvm.compiler.core.common.GraalOptions.CanOmitFrame;
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import static org.graalvm.compiler.core.common.GraalOptions.GeneratePIC;
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import static org.graalvm.compiler.core.common.GraalOptions.ZapStackOnMethodEntry;
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import static jdk.vm.ci.amd64.AMD64.r10;
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import static jdk.vm.ci.amd64.AMD64.rax;
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import static jdk.vm.ci.amd64.AMD64.rsp;
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import static jdk.vm.ci.code.ValueUtil.asRegister;
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import java.util.Set;
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import org.graalvm.compiler.asm.Assembler;
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import org.graalvm.compiler.asm.Label;
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import org.graalvm.compiler.asm.amd64.AMD64Address;
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import org.graalvm.compiler.asm.amd64.AMD64Assembler.ConditionFlag;
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import org.graalvm.compiler.asm.amd64.AMD64MacroAssembler;
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import org.graalvm.compiler.code.CompilationResult;
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import org.graalvm.compiler.core.amd64.AMD64NodeMatchRules;
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import org.graalvm.compiler.core.common.LIRKind;
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import org.graalvm.compiler.core.common.CompilationIdentifier;
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import org.graalvm.compiler.core.common.alloc.RegisterAllocationConfig;
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import org.graalvm.compiler.core.target.Backend;
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import org.graalvm.compiler.hotspot.GraalHotSpotVMConfig;
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import org.graalvm.compiler.hotspot.HotSpotDataBuilder;
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import org.graalvm.compiler.hotspot.HotSpotGraalRuntimeProvider;
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import org.graalvm.compiler.hotspot.HotSpotHostBackend;
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import org.graalvm.compiler.hotspot.HotSpotLIRGenerationResult;
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import org.graalvm.compiler.hotspot.meta.HotSpotConstantLoadAction;
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import org.graalvm.compiler.hotspot.meta.HotSpotForeignCallsProvider;
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import org.graalvm.compiler.hotspot.meta.HotSpotProviders;
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import org.graalvm.compiler.hotspot.stubs.Stub;
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import org.graalvm.compiler.lir.LIR;
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import org.graalvm.compiler.lir.amd64.AMD64Call;
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import org.graalvm.compiler.lir.amd64.AMD64FrameMap;
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import org.graalvm.compiler.lir.amd64.AMD64FrameMapBuilder;
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import org.graalvm.compiler.lir.asm.CompilationResultBuilder;
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import org.graalvm.compiler.lir.asm.CompilationResultBuilderFactory;
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import org.graalvm.compiler.lir.asm.DataBuilder;
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import org.graalvm.compiler.lir.asm.FrameContext;
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import org.graalvm.compiler.lir.framemap.FrameMap;
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import org.graalvm.compiler.lir.framemap.FrameMapBuilder;
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import org.graalvm.compiler.lir.gen.LIRGenerationResult;
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import org.graalvm.compiler.lir.gen.LIRGeneratorTool;
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import org.graalvm.compiler.nodes.StructuredGraph;
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import org.graalvm.compiler.nodes.spi.NodeLIRBuilderTool;
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import jdk.vm.ci.amd64.AMD64;
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import jdk.vm.ci.amd64.AMD64Kind;
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import jdk.vm.ci.code.CallingConvention;
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import jdk.vm.ci.code.Register;
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import jdk.vm.ci.code.RegisterConfig;
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import jdk.vm.ci.code.StackSlot;
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import jdk.vm.ci.hotspot.HotSpotCallingConventionType;
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import jdk.vm.ci.hotspot.HotSpotSentinelConstant;
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import jdk.vm.ci.meta.JavaKind;
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import jdk.vm.ci.meta.JavaType;
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import jdk.vm.ci.meta.ResolvedJavaMethod;
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/**
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 * HotSpot AMD64 specific backend.
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 */
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public class AMD64HotSpotBackend extends HotSpotHostBackend {
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    public AMD64HotSpotBackend(GraalHotSpotVMConfig config, HotSpotGraalRuntimeProvider runtime, HotSpotProviders providers) {
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        super(config, runtime, providers);
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    }
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    @Override
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    public FrameMapBuilder newFrameMapBuilder(RegisterConfig registerConfig) {
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        RegisterConfig registerConfigNonNull = registerConfig == null ? getCodeCache().getRegisterConfig() : registerConfig;
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        return new AMD64FrameMapBuilder(newFrameMap(registerConfigNonNull), getCodeCache(), registerConfigNonNull);
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    }
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    @Override
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    public FrameMap newFrameMap(RegisterConfig registerConfig) {
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        return new AMD64FrameMap(getCodeCache(), registerConfig, this);
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    }
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    @Override
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    public LIRGeneratorTool newLIRGenerator(LIRGenerationResult lirGenRes) {
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        return new AMD64HotSpotLIRGenerator(getProviders(), config, lirGenRes);
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    }
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    @Override
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    public LIRGenerationResult newLIRGenerationResult(CompilationIdentifier compilationId, LIR lir, FrameMapBuilder frameMapBuilder, StructuredGraph graph, Object stub) {
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        return new HotSpotLIRGenerationResult(compilationId, lir, frameMapBuilder, makeCallingConvention(graph, (Stub) stub), stub);
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    }
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    @Override
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    public NodeLIRBuilderTool newNodeLIRBuilder(StructuredGraph graph, LIRGeneratorTool lirGen) {
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        return new AMD64HotSpotNodeLIRBuilder(graph, lirGen, new AMD64NodeMatchRules(lirGen));
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    }
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    @Override
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    protected void bangStackWithOffset(CompilationResultBuilder crb, int bangOffset) {
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        AMD64MacroAssembler asm = (AMD64MacroAssembler) crb.asm;
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        int pos = asm.position();
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        asm.movl(new AMD64Address(rsp, -bangOffset), AMD64.rax);
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        assert asm.position() - pos >= PATCHED_VERIFIED_ENTRY_POINT_INSTRUCTION_SIZE;
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    }
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    /**
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     * The size of the instruction used to patch the verified entry point of an nmethod when the
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     * nmethod is made non-entrant or a zombie (e.g. during deopt or class unloading). The first
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     * instruction emitted at an nmethod's verified entry point must be at least this length to
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     * ensure mt-safe patching.
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     */
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    public static final int PATCHED_VERIFIED_ENTRY_POINT_INSTRUCTION_SIZE = 5;
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    /**
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     * Emits code at the verified entry point and return point(s) of a method.
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     */
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    class HotSpotFrameContext implements FrameContext {
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        final boolean isStub;
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        final boolean omitFrame;
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        HotSpotFrameContext(boolean isStub, boolean omitFrame) {
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            this.isStub = isStub;
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            this.omitFrame = omitFrame;
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        }
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        @Override
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        public boolean hasFrame() {
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            return !omitFrame;
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        }
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        @Override
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        public void enter(CompilationResultBuilder crb) {
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            FrameMap frameMap = crb.frameMap;
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            int frameSize = frameMap.frameSize();
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            AMD64MacroAssembler asm = (AMD64MacroAssembler) crb.asm;
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            if (omitFrame) {
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                if (!isStub) {
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                    asm.nop(PATCHED_VERIFIED_ENTRY_POINT_INSTRUCTION_SIZE);
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                }
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            } else {
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                int verifiedEntryPointOffset = asm.position();
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                if (!isStub) {
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                    emitStackOverflowCheck(crb);
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                    // assert asm.position() - verifiedEntryPointOffset >=
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                    // PATCHED_VERIFIED_ENTRY_POINT_INSTRUCTION_SIZE;
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                }
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                if (!isStub && asm.position() == verifiedEntryPointOffset) {
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                    asm.subqWide(rsp, frameSize);
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                    assert asm.position() - verifiedEntryPointOffset >= PATCHED_VERIFIED_ENTRY_POINT_INSTRUCTION_SIZE;
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                } else {
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                    asm.decrementq(rsp, frameSize);
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                }
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                if (ZapStackOnMethodEntry.getValue()) {
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                    final int intSize = 4;
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                    for (int i = 0; i < frameSize / intSize; ++i) {
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                        asm.movl(new AMD64Address(rsp, i * intSize), 0xC1C1C1C1);
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                    }
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                }
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                assert frameMap.getRegisterConfig().getCalleeSaveRegisters() == null;
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            }
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        }
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        @Override
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        public void leave(CompilationResultBuilder crb) {
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            if (!omitFrame) {
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                AMD64MacroAssembler asm = (AMD64MacroAssembler) crb.asm;
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                assert crb.frameMap.getRegisterConfig().getCalleeSaveRegisters() == null;
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                int frameSize = crb.frameMap.frameSize();
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                asm.incrementq(rsp, frameSize);
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            }
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        }
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    }
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    @Override
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    protected Assembler createAssembler(FrameMap frameMap) {
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        return new AMD64MacroAssembler(getTarget());
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    }
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    @Override
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    public CompilationResultBuilder newCompilationResultBuilder(LIRGenerationResult lirGenRen, FrameMap frameMap, CompilationResult compilationResult, CompilationResultBuilderFactory factory) {
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        // Omit the frame if the method:
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        // - has no spill slots or other slots allocated during register allocation
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        // - has no callee-saved registers
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        // - has no incoming arguments passed on the stack
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        // - has no deoptimization points
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        // - makes no foreign calls (which require an aligned stack)
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        HotSpotLIRGenerationResult gen = (HotSpotLIRGenerationResult) lirGenRen;
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        LIR lir = gen.getLIR();
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        assert gen.getDeoptimizationRescueSlot() == null || frameMap.frameNeedsAllocating() : "method that can deoptimize must have a frame";
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        boolean omitFrame = CanOmitFrame.getValue() && !frameMap.frameNeedsAllocating() && !lir.hasArgInCallerFrame() && !gen.hasForeignCall();
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        Stub stub = gen.getStub();
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        Assembler masm = createAssembler(frameMap);
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        HotSpotFrameContext frameContext = new HotSpotFrameContext(stub != null, omitFrame);
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        DataBuilder dataBuilder = new HotSpotDataBuilder(getCodeCache().getTarget());
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        CompilationResultBuilder crb = factory.createBuilder(getCodeCache(), getForeignCalls(), frameMap, masm, dataBuilder, frameContext, compilationResult);
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        crb.setTotalFrameSize(frameMap.totalFrameSize());
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        crb.setMaxInterpreterFrameSize(gen.getMaxInterpreterFrameSize());
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        StackSlot deoptimizationRescueSlot = gen.getDeoptimizationRescueSlot();
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        if (deoptimizationRescueSlot != null && stub == null) {
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            crb.compilationResult.setCustomStackAreaOffset(deoptimizationRescueSlot);
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        }
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        if (stub != null) {
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            Set<Register> destroyedCallerRegisters = gatherDestroyedCallerRegisters(lir);
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            updateStub(stub, destroyedCallerRegisters, gen.getCalleeSaveInfo(), frameMap);
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        }
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        return crb;
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    }
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    @Override
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    public void emitCode(CompilationResultBuilder crb, LIR lir, ResolvedJavaMethod installedCodeOwner) {
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        AMD64MacroAssembler asm = (AMD64MacroAssembler) crb.asm;
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        FrameMap frameMap = crb.frameMap;
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        RegisterConfig regConfig = frameMap.getRegisterConfig();
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        Label verifiedEntry = new Label();
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        // Emit the prefix
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        emitCodePrefix(installedCodeOwner, crb, asm, regConfig, verifiedEntry);
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        // Emit code for the LIR
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        emitCodeBody(installedCodeOwner, crb, lir);
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        // Emit the suffix
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        emitCodeSuffix(installedCodeOwner, crb, asm, frameMap);
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        // Profile assembler instructions
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        profileInstructions(lir, crb);
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    }
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    /**
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     * Emits the code prior to the verified entry point.
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     *
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     * @param installedCodeOwner see {@link Backend#emitCode}
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     */
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    public void emitCodePrefix(ResolvedJavaMethod installedCodeOwner, CompilationResultBuilder crb, AMD64MacroAssembler asm, RegisterConfig regConfig, Label verifiedEntry) {
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        HotSpotProviders providers = getProviders();
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        if (installedCodeOwner != null && !installedCodeOwner.isStatic()) {
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            crb.recordMark(config.MARKID_UNVERIFIED_ENTRY);
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            CallingConvention cc = regConfig.getCallingConvention(HotSpotCallingConventionType.JavaCallee, null, new JavaType[]{providers.getMetaAccess().lookupJavaType(Object.class)}, this);
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            Register inlineCacheKlass = rax; // see definition of IC_Klass in
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                                             // c1_LIRAssembler_x86.cpp
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            Register receiver = asRegister(cc.getArgument(0));
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            AMD64Address src = new AMD64Address(receiver, config.hubOffset);
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            if (config.useCompressedClassPointers) {
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                Register register = r10;
43435
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                AMD64HotSpotMove.decodeKlassPointer(crb, asm, register, providers.getRegisters().getHeapBaseRegister(), src, config);
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                if (GeneratePIC.getValue()) {
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                    asm.movq(providers.getRegisters().getHeapBaseRegister(), asm.getPlaceholder(-1));
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                    crb.recordMark(config.MARKID_NARROW_OOP_BASE_ADDRESS);
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                } else {
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                    if (config.narrowKlassBase != 0) {
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                        // The heap base register was destroyed above, so restore it
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                        asm.movq(providers.getRegisters().getHeapBaseRegister(), config.narrowOopBase);
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                    }
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                }
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                asm.cmpq(inlineCacheKlass, register);
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            } else {
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                asm.cmpq(inlineCacheKlass, src);
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            }
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            AMD64Call.directConditionalJmp(crb, asm, getForeignCalls().lookupForeignCall(IC_MISS_HANDLER), ConditionFlag.NotEqual);
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        }
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        asm.align(config.codeEntryAlignment);
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        crb.recordMark(config.MARKID_OSR_ENTRY);
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        asm.bind(verifiedEntry);
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        crb.recordMark(config.MARKID_VERIFIED_ENTRY);
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        if (GeneratePIC.getValue()) {
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            // Check for method state
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            HotSpotFrameContext frameContext = (HotSpotFrameContext) crb.frameContext;
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            if (!frameContext.isStub) {
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                crb.recordInlineDataInCodeWithNote(new HotSpotSentinelConstant(LIRKind.value(AMD64Kind.QWORD), JavaKind.Long), HotSpotConstantLoadAction.MAKE_NOT_ENTRANT);
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                asm.movq(AMD64.rax, asm.getPlaceholder(-1));
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                asm.testq(AMD64.rax, AMD64.rax);
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                AMD64Call.directConditionalJmp(crb, asm, getForeignCalls().lookupForeignCall(WRONG_METHOD_HANDLER), ConditionFlag.NotZero);
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            }
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        }
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    }
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    /**
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     * Emits the code which starts at the verified entry point.
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     *
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     * @param installedCodeOwner see {@link Backend#emitCode}
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     */
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    public void emitCodeBody(ResolvedJavaMethod installedCodeOwner, CompilationResultBuilder crb, LIR lir) {
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        crb.emit(lir);
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    }
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    /**
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     * @param installedCodeOwner see {@link Backend#emitCode}
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     */
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    public void emitCodeSuffix(ResolvedJavaMethod installedCodeOwner, CompilationResultBuilder crb, AMD64MacroAssembler asm, FrameMap frameMap) {
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        HotSpotProviders providers = getProviders();
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        HotSpotFrameContext frameContext = (HotSpotFrameContext) crb.frameContext;
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        if (!frameContext.isStub) {
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            HotSpotForeignCallsProvider foreignCalls = providers.getForeignCalls();
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            crb.recordMark(config.MARKID_EXCEPTION_HANDLER_ENTRY);
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            AMD64Call.directCall(crb, asm, foreignCalls.lookupForeignCall(EXCEPTION_HANDLER), null, false, null);
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            crb.recordMark(config.MARKID_DEOPT_HANDLER_ENTRY);
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            AMD64Call.directCall(crb, asm, foreignCalls.lookupForeignCall(DEOPTIMIZATION_HANDLER), null, false, null);
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        } else {
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            // No need to emit the stubs for entries back into the method since
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            // it has no calls that can cause such "return" entries
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            if (frameContext.omitFrame) {
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                // Cannot access slots in caller's frame if my frame is omitted
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                assert !frameMap.accessesCallerFrame();
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            }
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        }
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    }
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    @Override
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    public RegisterAllocationConfig newRegisterAllocationConfig(RegisterConfig registerConfig) {
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        RegisterConfig registerConfigNonNull = registerConfig == null ? getCodeCache().getRegisterConfig() : registerConfig;
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        return new AMD64HotSpotRegisterAllocationConfig(registerConfigNonNull);
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    }
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    @Override
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    public Set<Register> translateToCallerRegisters(Set<Register> calleeRegisters) {
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        return calleeRegisters;
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    }
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}