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annotate graal/com.oracle.graal.hotspot.amd64/src/com/oracle/graal/hotspot/amd64/AMD64HotSpotEpilogueOp.java @ 21556:48c1ebd24120

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renamed com.oracle.graal.api[meta|code] modules to com.oracle.jvmci.[meta|code] (JBS:GRAAL-53)
author Doug Simon <doug.simon@oracle.com>
date Wed, 27 May 2015 00:36:16 +0200
parents 8fc336a04d77
children 47a3d4b3ccb3
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9882af5c8504 AMD64 HotSpot backend now models RBP as an incoming parameter that must be preserved until the end of the method. For non-leaf methods, the value is preserved in the special stack slot required by the HotSpot runtime for walking/inspecting frames of such methods.
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1 /*
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2 * Copyright (c) 2012, 2014, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
9882af5c8504 AMD64 HotSpot backend now models RBP as an incoming parameter that must be preserved until the end of the method. For non-leaf methods, the value is preserved in the special stack slot required by the HotSpot runtime for walking/inspecting frames of such methods.
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
9882af5c8504 AMD64 HotSpot backend now models RBP as an incoming parameter that must be preserved until the end of the method. For non-leaf methods, the value is preserved in the special stack slot required by the HotSpot runtime for walking/inspecting frames of such methods.
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
9882af5c8504 AMD64 HotSpot backend now models RBP as an incoming parameter that must be preserved until the end of the method. For non-leaf methods, the value is preserved in the special stack slot required by the HotSpot runtime for walking/inspecting frames of such methods.
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
9882af5c8504 AMD64 HotSpot backend now models RBP as an incoming parameter that must be preserved until the end of the method. For non-leaf methods, the value is preserved in the special stack slot required by the HotSpot runtime for walking/inspecting frames of such methods.
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12 * version 2 for more details (a copy is included in the LICENSE file that
9882af5c8504 AMD64 HotSpot backend now models RBP as an incoming parameter that must be preserved until the end of the method. For non-leaf methods, the value is preserved in the special stack slot required by the HotSpot runtime for walking/inspecting frames of such methods.
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13 * accompanied this code).
9882af5c8504 AMD64 HotSpot backend now models RBP as an incoming parameter that must be preserved until the end of the method. For non-leaf methods, the value is preserved in the special stack slot required by the HotSpot runtime for walking/inspecting frames of such methods.
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
9882af5c8504 AMD64 HotSpot backend now models RBP as an incoming parameter that must be preserved until the end of the method. For non-leaf methods, the value is preserved in the special stack slot required by the HotSpot runtime for walking/inspecting frames of such methods.
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
9882af5c8504 AMD64 HotSpot backend now models RBP as an incoming parameter that must be preserved until the end of the method. For non-leaf methods, the value is preserved in the special stack slot required by the HotSpot runtime for walking/inspecting frames of such methods.
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20 * or visit www.oracle.com if you need additional information or have any
9882af5c8504 AMD64 HotSpot backend now models RBP as an incoming parameter that must be preserved until the end of the method. For non-leaf methods, the value is preserved in the special stack slot required by the HotSpot runtime for walking/inspecting frames of such methods.
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21 * questions.
9882af5c8504 AMD64 HotSpot backend now models RBP as an incoming parameter that must be preserved until the end of the method. For non-leaf methods, the value is preserved in the special stack slot required by the HotSpot runtime for walking/inspecting frames of such methods.
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22 */
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23 package com.oracle.graal.hotspot.amd64;
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24
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25 import com.oracle.jvmci.code.Register;
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26 import com.oracle.jvmci.meta.LIRKind;
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27 import com.oracle.jvmci.meta.AllocatableValue;
48c1ebd24120 renamed com.oracle.graal.api[meta|code] modules to com.oracle.jvmci.[meta|code] (JBS:GRAAL-53)
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28 import com.oracle.jvmci.meta.Kind;
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29 import static com.oracle.graal.amd64.AMD64.*;
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48c1ebd24120 renamed com.oracle.graal.api[meta|code] modules to com.oracle.jvmci.[meta|code] (JBS:GRAAL-53)
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30 import static com.oracle.jvmci.code.ValueUtil.*;
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31 import static com.oracle.graal.lir.LIRInstruction.OperandFlag.*;
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32
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33 import com.oracle.graal.asm.amd64.*;
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34 import com.oracle.graal.lir.*;
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35 import com.oracle.graal.lir.amd64.*;
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36 import com.oracle.graal.lir.asm.*;
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37
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38 /**
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39 * Superclass for operations that use the value of RBP saved in a method's prologue.
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40 */
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twisti
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41 abstract class AMD64HotSpotEpilogueOp extends AMD64LIRInstruction {
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42
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43 protected AMD64HotSpotEpilogueOp(LIRInstructionClass<? extends AMD64HotSpotEpilogueOp> c) {
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44 super(c);
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45 }
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46
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47 /**
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48 * The type of location (i.e., stack or register) in which RBP is saved is not known until
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49 * initial LIR generation is finished. Until then, we use a placeholder variable so that LIR
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50 * verification is successful.
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51 */
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52 private static final Variable PLACEHOLDER = new Variable(LIRKind.value(Kind.Long), Integer.MAX_VALUE);
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53
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54 @Use({REG, STACK}) protected AllocatableValue savedRbp = PLACEHOLDER;
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55
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56 protected void leaveFrameAndRestoreRbp(CompilationResultBuilder crb, AMD64MacroAssembler masm) {
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57 if (isStackSlot(savedRbp)) {
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58 // Restoring RBP from the stack must be done before the frame is removed
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59 masm.movq(rbp, (AMD64Address) crb.asAddress(savedRbp));
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60 } else {
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61 Register framePointer = asRegister(savedRbp);
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62 if (!framePointer.equals(rbp)) {
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63 masm.movq(rbp, framePointer);
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64 }
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65 }
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66 crb.frameContext.leave(crb);
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67 }
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68 }