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/*
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* Copyright (c) 2012, 2019, 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 jdk.vm.ci.amd64.AMD64.rbp;
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import static jdk.vm.ci.code.ValueUtil.asRegister;
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import static jdk.vm.ci.code.ValueUtil.isStackSlot;
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import static org.graalvm.compiler.lir.LIRInstruction.OperandFlag.ILLEGAL;
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import static org.graalvm.compiler.lir.LIRInstruction.OperandFlag.REG;
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import static org.graalvm.compiler.lir.LIRInstruction.OperandFlag.STACK;
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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.amd64.AMD64FrameMap;
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import org.graalvm.compiler.lir.amd64.AMD64LIRInstruction;
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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.meta.AllocatableValue;
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import jdk.vm.ci.meta.Value;
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/**
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* Superclass for operations that use the value of RBP saved in a method's prologue.
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*/
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abstract class AMD64HotSpotEpilogueOp extends AMD64LIRInstruction implements AMD64HotSpotRestoreRbpOp {
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protected AMD64HotSpotEpilogueOp(LIRInstructionClass<? extends AMD64HotSpotEpilogueOp> c) {
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super(c);
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}
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@Use({REG, STACK, ILLEGAL}) private AllocatableValue savedRbp = Value.ILLEGAL;
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protected void leaveFrameAndRestoreRbp(CompilationResultBuilder crb, AMD64MacroAssembler masm) {
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leaveFrameAndRestoreRbp(savedRbp, crb, masm);
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}
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static void leaveFrameAndRestoreRbp(AllocatableValue savedRbp, CompilationResultBuilder crb, AMD64MacroAssembler masm) {
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if (Value.ILLEGAL.equals(savedRbp)) {
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// RBP will be restored in FrameContext.leave(..). Nothing to do here.
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assert ((AMD64FrameMap) crb.frameMap).useStandardFrameProlog() : "savedRbp is not initialized.";
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} else if (isStackSlot(savedRbp)) {
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// Restoring RBP from the stack must be done before the frame is removed
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masm.movq(rbp, (AMD64Address) crb.asAddress(savedRbp));
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} else {
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Register framePointer = asRegister(savedRbp);
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if (!framePointer.equals(rbp)) {
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masm.movq(rbp, framePointer);
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}
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}
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crb.frameContext.leave(crb);
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}
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@Override
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public void setSavedRbp(AllocatableValue value) {
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savedRbp = value;
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}
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}
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