Mercurial > hg > truffle
view graal/com.oracle.graal.hotspot.amd64/src/com/oracle/graal/hotspot/amd64/AMD64HotSpotEpilogueOp.java @ 15831:1ddee372bf62
Make classes extensible
author | Christian Wimmer <christian.wimmer@oracle.com> |
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date | Tue, 20 May 2014 18:55:59 -0700 |
parents | ed29f7ff71eb |
children | c0b8d395368b |
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/* * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * 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. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ package com.oracle.graal.hotspot.amd64; import static com.oracle.graal.amd64.AMD64.*; import static com.oracle.graal.api.code.ValueUtil.*; import static com.oracle.graal.lir.LIRInstruction.OperandFlag.*; import com.oracle.graal.api.code.*; import com.oracle.graal.api.meta.*; import com.oracle.graal.asm.amd64.*; import com.oracle.graal.lir.*; import com.oracle.graal.lir.amd64.*; import com.oracle.graal.lir.asm.*; /** * Superclass for operations that use the value of RBP saved in a method's prologue. */ abstract class AMD64HotSpotEpilogueOp extends AMD64LIRInstruction { /** * The type of location (i.e., stack or register) in which RBP is saved is not known until * initial LIR generation is finished. Until then, we use a placeholder variable so that LIR * verification is successful. */ private static final Variable PLACEHOLDER = new Variable(Kind.Long, Integer.MAX_VALUE); @Use({REG, STACK}) protected AllocatableValue savedRbp = PLACEHOLDER; protected void leaveFrameAndRestoreRbp(CompilationResultBuilder crb, AMD64MacroAssembler masm) { if (isStackSlot(savedRbp)) { // Restoring RBP from the stack must be done before the frame is removed masm.movq(rbp, (AMD64Address) crb.asAddress(savedRbp)); } else { Register framePointer = asRegister(savedRbp); if (!framePointer.equals(rbp)) { masm.movq(rbp, framePointer); } } crb.frameContext.leave(crb); } }