JDK14/Java14源码在线阅读

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 * 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
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 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * 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).
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 * 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.hotspot.aarch64;

import static jdk.vm.ci.aarch64.AArch64.lr;
import static jdk.vm.ci.code.ValueUtil.asRegister;
import static org.graalvm.compiler.hotspot.HotSpotHostBackend.DEOPT_BLOB_UNPACK_WITH_EXCEPTION_IN_TLS;

import org.graalvm.compiler.asm.aarch64.AArch64MacroAssembler;
import org.graalvm.compiler.hotspot.GraalHotSpotVMConfig;
import org.graalvm.compiler.lir.LIRInstructionClass;
import org.graalvm.compiler.lir.Opcode;
import org.graalvm.compiler.lir.aarch64.AArch64Call;
import org.graalvm.compiler.lir.asm.CompilationResultBuilder;

import jdk.vm.ci.code.Register;
import jdk.vm.ci.meta.Value;

/**
 * Removes the current frame and tail calls the uncommon trap routine.
 */
@Opcode("DEOPT_WITH_EXCEPTION_IN_CALLER")
public class AArch64HotSpotDeoptimizeWithExceptionCallerOp extends AArch64HotSpotEpilogueOp {
    public static final LIRInstructionClass<AArch64HotSpotDeoptimizeWithExceptionCallerOp> TYPE = LIRInstructionClass.create(AArch64HotSpotDeoptimizeWithExceptionCallerOp.class);

    @Use(OperandFlag.REG) private Value exception;

    public AArch64HotSpotDeoptimizeWithExceptionCallerOp(GraalHotSpotVMConfig config, Value exception, Register thread) {
        super(TYPE, config, thread);
        this.exception = exception;
    }

    @Override
    public void emitCode(CompilationResultBuilder crb, AArch64MacroAssembler masm) {
        Register exc = asRegister(exception);

        leaveFrame(crb, masm, /* emitSafepoint */false, false);

        // Save exception oop in TLS

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