graal-compiler: graal/Compiler/src/com/sun/c1x/ir/BlockBegin.java annotate

author	Thomas Wuerthinger <thomas@wuerthinger.net>
date	Wed, 27 Apr 2011 11:43:22 +0200
parents
children

rev	line source
2507 9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	1 /*
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	2 * Copyright (c) 2009, 2011, Oracle and/or its affiliates. All rights reserved.
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	4 *
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	5 * This code is free software; you can redistribute it and/or modify it
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	6 * under the terms of the GNU General Public License version 2 only, as
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	7 * published by the Free Software Foundation.
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	8 *
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	9 * This code is distributed in the hope that it will be useful, but WITHOUT
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	12 * version 2 for more details (a copy is included in the LICENSE file that
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	13 * accompanied this code).
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	14 *
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	15 * You should have received a copy of the GNU General Public License version
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	16 * 2 along with this work; if not, write to the Free Software Foundation,
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	18 *
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	20 * or visit www.oracle.com if you need additional information or have any
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	21 * questions.
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	22 */
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	23 package com.sun.c1x.ir;
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	24
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	25 import java.util.*;
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	26
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	27 import com.sun.c1x.*;
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	28 import com.sun.c1x.asm.*;
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	29 import com.sun.c1x.debug.*;
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	30 import com.sun.c1x.lir.*;
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	31 import com.sun.c1x.util.*;
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	32 import com.sun.c1x.value.*;
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	33 import com.sun.cri.ci.*;
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	34
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	35 /**
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	36 * Denotes the beginning of a basic block, and holds information
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	37 * about the basic block, including the successor and
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	38 * predecessor blocks, exception handlers, liveness information, etc.
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	39 *
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	40 * @author Ben L. Titzer
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	41 */
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	42 public final class BlockBegin extends Instruction {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	43 private static final List<BlockBegin> NO_HANDLERS = Collections.emptyList();
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	44
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	45 /**
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	46 * An enumeration of flags for block entries indicating various things.
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	47 */
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	48 public enum BlockFlag {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	49 StandardEntry,
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	50 OsrEntry,
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	51 ExceptionEntry,
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	52 SubroutineEntry,
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	53 BackwardBranchTarget,
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	54 IsOnWorkList,
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	55 WasVisited,
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	56 DefaultExceptionHandler,
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	57 ParserLoopHeader,
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	58 CriticalEdgeSplit,
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	59 LinearScanLoopHeader,
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	60 LinearScanLoopEnd;
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	61
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	62 public final int mask = 1 << ordinal();
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	63 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	64
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	65 /**
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	66 * A unique id used in tracing.
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	67 */
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	68 public final int blockID;
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	69
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	70 /**
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	71 * Denotes the current set of {@link BlockBegin.BlockFlag} settings.
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	72 */
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	73 private int blockFlags;
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	74
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	75 /**
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	76 * The frame state before execution of the first instruction in this block.
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	77 */
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	78 private FrameState stateBefore;
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	79
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	80 /**
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	81 * A link to the last node in the block (which contains the successors).
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	82 */
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	83 private BlockEnd end;
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	84
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	85 /**
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	86 * The {@link BlockBegin} nodes for which this node is a successor.
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	87 */
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	88 private final List<BlockBegin> predecessors;
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	89
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	90 private int depthFirstNumber;
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	91 private int linearScanNumber;
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	92 private int loopDepth;
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	93 private int loopIndex;
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	94
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	95 private BlockBegin dominator;
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	96 private List<BlockBegin> exceptionHandlerBlocks;
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	97 private List<FrameState> exceptionHandlerStates;
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	98
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	99 // LIR block
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	100 public LIRBlock lirBlock;
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	101
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	102 /**
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	103 * Constructs a new BlockBegin at the specified bytecode index.
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	104 * @param bci the bytecode index of the start
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	105 * @param blockID the ID of the block
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	106 */
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	107 public BlockBegin(int bci, int blockID) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	108 super(CiKind.Illegal);
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	109 this.blockID = blockID;
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	110 depthFirstNumber = -1;
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	111 linearScanNumber = -1;
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	112 predecessors = new ArrayList<BlockBegin>(2);
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	113 loopIndex = -1;
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	114 setBCI(bci);
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	115 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	116
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	117 /**
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	118 * Gets the list of predecessors of this block.
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	119 * @return the predecessor list
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	120 */
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	121 public List<BlockBegin> predecessors() {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	122 return predecessors;
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	123 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	124
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	125 /**
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	126 * Gets the dominator of this block.
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	127 * @return the dominator block
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	128 */
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	129 public BlockBegin dominator() {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	130 return dominator;
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	131 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	132
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	133 /**
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	134 * Sets the dominator block for this block.
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	135 * @param dominator the dominator for this block
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	136 */
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	137 public void setDominator(BlockBegin dominator) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	138 this.dominator = dominator;
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	139 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	140
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	141 /**
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	142 * Gets the depth first traversal number of this block.
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	143 * @return the depth first number
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	144 */
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	145 public int depthFirstNumber() {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	146 return depthFirstNumber;
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	147 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	148
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	149 /**
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	150 * Gets the linear scan number of this block.
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	151 * @return the linear scan number
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	152 */
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	153 public int linearScanNumber() {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	154 return linearScanNumber;
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	155 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	156
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	157 /**
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	158 * Gets the loop depth of this block.
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	159 * @return the loop depth
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	160 */
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	161 public int loopDepth() {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	162 return loopDepth;
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	163 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	164
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	165 /**
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	166 * Gets the loop index of this block.
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	167 * @return the loop index
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	168 */
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	169 public int loopIndex() {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	170 return loopIndex;
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	171 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	172
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	173 /**
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	174 * Gets the block end associated with this basic block.
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	175 * @return the block end
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	176 */
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	177 public BlockEnd end() {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	178 return end;
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	179 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	180
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	181 /**
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	182 * Gets the state at the start of this block.
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	183 * @return the state at the start of this block
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	184 */
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	185 @Override
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	186 public FrameState stateBefore() {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	187 return stateBefore;
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	188 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	189
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	190 /**
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	191 * Sets the initial state for this block.
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	192 * @param stateBefore the state for this block
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	193 */
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	194 public void setStateBefore(FrameState stateBefore) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	195 assert this.stateBefore == null;
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	196 this.stateBefore = stateBefore;
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	197 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	198
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	199 /**
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	200 * Gets the exception handlers that cover one or more instructions of this basic block.
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	201 *
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	202 * @return the exception handlers
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	203 */
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	204 public List<BlockBegin> exceptionHandlerBlocks() {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	205 return exceptionHandlerBlocks == null ? NO_HANDLERS : exceptionHandlerBlocks;
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	206 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	207
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	208 public List<FrameState> exceptionHandlerStates() {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	209 return exceptionHandlerStates;
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	210 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	211
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	212 public void setDepthFirstNumber(int depthFirstNumber) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	213 assert depthFirstNumber >= 0;
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	214 this.depthFirstNumber = depthFirstNumber;
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	215 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	216
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	217 public void setLinearScanNumber(int linearScanNumber) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	218 this.linearScanNumber = linearScanNumber;
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	219 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	220
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	221 public void setLoopDepth(int loopDepth) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	222 this.loopDepth = loopDepth;
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	223 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	224
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	225 public void setLoopIndex(int loopIndex) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	226 this.loopIndex = loopIndex;
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	227 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	228
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	229 /**
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	230 * Set the block end for this block begin. This method will
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	231 * reset this block's successor list and rebuild it to be equivalent
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	232 * to the successor list of the specified block end.
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	233 * @param end the new block end for this block begin
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	234 */
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	235 public void setEnd(BlockEnd end) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	236 assert end != null;
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	237 BlockEnd old = this.end;
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	238 if (old != end) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	239 if (old != null) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	240 // disconnect this block from the old end
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	241 old.setBegin(null);
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	242 // disconnect this block from its current successors
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	243 for (BlockBegin s : old.successors()) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	244 s.predecessors().remove(this);
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	245 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	246 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	247 this.end = end;
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	248 end.setBegin(this);
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	249 for (BlockBegin s : end.successors()) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	250 s.addPredecessor(this);
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	251 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	252 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	253 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	254
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	255 /**
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	256 * Set a flag on this block.
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	257 * @param flag the flag to set
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	258 */
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	259 public void setBlockFlag(BlockFlag flag) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	260 blockFlags \|= flag.mask;
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	261 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	262
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	263 /**
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	264 * Clear a flag on this block.
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	265 * @param flag the flag to clear
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	266 */
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	267 public void clearBlockFlag(BlockFlag flag) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	268 blockFlags &= ~flag.mask;
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	269 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	270
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	271 public void copyBlockFlag(BlockBegin other, BlockFlag flag) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	272 setBlockFlag(flag, other.checkBlockFlag(flag));
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	273 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	274
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	275 /**
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	276 * Check whether this block has the specified flag set.
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	277 * @param flag the flag to test
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	278 * @return {@code true} if this block has the flag
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	279 */
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	280 public boolean checkBlockFlag(BlockFlag flag) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	281 return (blockFlags & flag.mask) != 0;
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	282 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	283
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	284 /**
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	285 * Iterate over this block, its exception handlers, and its successors, in that order.
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	286 * @param closure the closure to apply to each block
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	287 */
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	288 public void iteratePreOrder(BlockClosure closure) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	289 // XXX: identity hash map might be too slow, consider a boolean array or a mark field
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	290 iterate(new IdentityHashMap<BlockBegin, BlockBegin>(), closure);
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	291 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	292
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	293 /**
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	294 * Iterate over all blocks transitively reachable from this block.
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	295 * @param closure the closure to apply to each block
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	296 * @param predecessors {@code true} if also to include this blocks predecessors
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	297 */
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	298 public void iterateAnyOrder(BlockClosure closure, boolean predecessors) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	299 IdentityHashMap<BlockBegin, BlockBegin> mark = new IdentityHashMap<BlockBegin, BlockBegin>();
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	300 LinkedList<BlockBegin> queue = new LinkedList<BlockBegin>();
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	301 queue.offer(this);
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	302 mark.put(this, this);
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	303 BlockBegin block;
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	304 while ((block = queue.poll()) != null) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	305 closure.apply(block);
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	306 queueBlocks(queue, block.exceptionHandlerBlocks(), mark);
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	307 queueBlocks(queue, block.end.successors(), mark);
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	308 queueBlocks(queue, predecessors ? block.predecessors : null, mark);
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	309 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	310 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	311
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	312 private void queueBlocks(LinkedList<BlockBegin> queue, List<BlockBegin> list, IdentityHashMap<BlockBegin, BlockBegin> mark) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	313 if (list != null) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	314 for (BlockBegin b : list) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	315 if (!mark.containsKey(b)) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	316 queue.offer(b);
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	317 mark.put(b, b);
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	318 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	319 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	320 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	321 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	322
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	323 private void iterate(IdentityHashMap<BlockBegin, BlockBegin> mark, BlockClosure closure) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	324 if (!mark.containsKey(this)) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	325 mark.put(this, this);
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	326 closure.apply(this);
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	327 BlockEnd e = end();
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	328 if (exceptionHandlerBlocks != null) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	329 iterateReverse(mark, closure, exceptionHandlerBlocks);
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	330 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	331 assert e != null : "block must have block end";
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	332 iterateReverse(mark, closure, e.successors());
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	333 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	334 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	335
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	336 private void iterateReverse(IdentityHashMap<BlockBegin, BlockBegin> mark, BlockClosure closure, List<BlockBegin> list) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	337 for (int i = list.size() - 1; i >= 0; i--) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	338 list.get(i).iterate(mark, closure);
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	339 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	340 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	341
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	342 /**
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	343 * Adds an exception handler that covers one or more instructions in this block.
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	344 *
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	345 * @param handler the entry block for the exception handler to add
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	346 */
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	347 public void addExceptionHandler(BlockBegin handler) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	348 assert handler != null && handler.checkBlockFlag(BlockBegin.BlockFlag.ExceptionEntry);
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	349 if (exceptionHandlerBlocks == null) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	350 exceptionHandlerBlocks = new ArrayList<BlockBegin>(3);
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	351 exceptionHandlerBlocks.add(handler);
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	352 } else if (!exceptionHandlerBlocks.contains(handler)) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	353 exceptionHandlerBlocks.add(handler);
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	354 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	355 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	356
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	357 /**
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	358 * Adds a frame state that merges into the exception handler whose entry is this block.
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	359 *
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	360 * @param state the frame state at an instruction that raises an exception that can be caught by the exception
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	361 * handler represented by this block
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	362 * @return the index of {@code state} in the list of frame states merging at this block (i.e. the frames states for
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	363 * all instruction throwing an exception caught by this exception handler)
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	364 */
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	365 public int addExceptionState(FrameState state) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	366 assert checkBlockFlag(BlockBegin.BlockFlag.ExceptionEntry);
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	367 if (exceptionHandlerStates == null) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	368 exceptionHandlerStates = new ArrayList<FrameState>(4);
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	369 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	370 exceptionHandlerStates.add(state);
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	371 return exceptionHandlerStates.size() - 1;
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	372 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	373
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	374 /**
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	375 * Add a predecessor to this block.
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	376 * @param pred the predecessor to add
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	377 */
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	378 public void addPredecessor(BlockBegin pred) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	379 predecessors.add(pred);
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	380 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	381
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	382 /**
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	383 * Removes all occurrences of the specified block from the predecessor list of this block.
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	384 * @param pred the predecessor to remove
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	385 */
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	386 public void removePredecessor(BlockBegin pred) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	387 while (predecessors.remove(pred)) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	388 // the block may appear multiple times in the list
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	389 // XXX: this is not very efficient, consider Util.removeAllFromList
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	390 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	391 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	392
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	393 @Override
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	394 public void accept(ValueVisitor v) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	395 v.visitBlockBegin(this);
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	396 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	397
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	398 public void mergeOrClone(FrameState newState) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	399 FrameState existingState = stateBefore;
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	400
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	401 if (existingState == null) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	402 // this is the first state for the block
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	403 if (wasVisited()) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	404 // this can happen for complex jsr/ret patterns; just bail out
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	405 throw new CiBailout("jsr/ret too complex");
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	406 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	407
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	408 // copy state because it is modified
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	409 newState = newState.copy();
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	410
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	411 if (C1XOptions.UseStackMapTableLiveness) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	412 // if a liveness map is available, use it to invalidate dead locals
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	413 CiBitMap[] livenessMap = newState.scope().method.livenessMap();
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	414 if (livenessMap != null && bci() >= 0) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	415 assert bci() < livenessMap.length;
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	416 CiBitMap liveness = livenessMap[bci()];
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	417 if (liveness != null) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	418 invalidateDeadLocals(newState, liveness);
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	419 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	420 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	421 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	422
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	423 // if the block is a loop header, insert all necessary phis
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	424 if (isParserLoopHeader()) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	425 insertLoopPhis(newState);
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	426 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	427
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	428 stateBefore = newState;
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	429 } else {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	430 if (!C1XOptions.AssumeVerifiedBytecode && !existingState.isSameAcrossScopes(newState)) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	431 // stacks or locks do not match--bytecodes would not verify
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	432 throw new CiBailout("stack or locks do not match");
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	433 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	434
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	435 // while (existingState.scope() != newState.scope()) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	436 // // XXX: original code is not sure if this is necessary
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	437 // newState = newState.scope().callerState();
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	438 // assert newState != null : "could not match scopes";
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	439 // }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	440 // above code replaced with assert for the moment
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	441 assert existingState.scope() == newState.scope();
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	442
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	443 assert existingState.localsSize() == newState.localsSize();
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	444 assert existingState.stackSize() == newState.stackSize();
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	445
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	446 if (wasVisited() && !isParserLoopHeader()) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	447 throw new CiBailout("jsr/ret too complicated");
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	448 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	449
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	450 existingState.merge(this, newState);
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	451 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	452 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	453
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	454 private void invalidateDeadLocals(FrameState newState, CiBitMap liveness) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	455 int max = newState.localsSize();
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	456 assert max <= liveness.size();
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	457 for (int i = 0; i < max; i++) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	458 Value x = newState.localAt(i);
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	459 if (x != null) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	460 if (!liveness.get(i)) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	461 // invalidate the local if it is not live
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	462 newState.invalidateLocal(i);
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	463 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	464 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	465 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	466 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	467
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	468 private void insertLoopPhis(FrameState newState) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	469 int stackSize = newState.stackSize();
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	470 for (int i = 0; i < stackSize; i++) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	471 // always insert phis for the stack
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	472 newState.setupPhiForStack(this, i);
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	473 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	474 int localsSize = newState.localsSize();
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	475 CiBitMap requiresPhi = newState.scope().getStoresInLoops();
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	476 for (int i = 0; i < localsSize; i++) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	477 Value x = newState.localAt(i);
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	478 if (x != null) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	479 if (requiresPhi != null) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	480 if (requiresPhi.get(i) \|\| x.kind.isDoubleWord() && requiresPhi.get(i + 1)) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	481 // selectively do a phi
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	482 newState.setupPhiForLocal(this, i);
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	483 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	484 } else {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	485 // always setup a phi
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	486 newState.setupPhiForLocal(this, i);
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	487 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	488 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	489 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	490 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	491
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	492 public boolean isStandardEntry() {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	493 return checkBlockFlag(BlockFlag.StandardEntry);
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	494 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	495
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	496 public void setStandardEntry() {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	497 setBlockFlag(BlockFlag.StandardEntry);
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	498 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	499
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	500 public boolean isOsrEntry() {

2507

9ec15d6914ca Pull over of compiler from maxine repository.