truffle: graal/Compiler/src/com/sun/c1x/value/FrameState.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.value;
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.graph.*;
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	29 import com.sun.c1x.ir.*;
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	30 import com.sun.cri.ci.*;
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	31 import com.sun.cri.ri.*;
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	32
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	33 /**
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	34 * The {@code FrameState} class encapsulates the frame state (i.e. local variables and
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	35 * operand stack) at a particular point in the abstract interpretation.
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	36 *
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	37 * @author Ben L. Titzer
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	38 */
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	39 public abstract class FrameState {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	40
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 * The operand stack and local variables.
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	43 * The local variables occupy the index range {@code [0 .. maxLocals)}.
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	44 * The operand stack occupies the index range {@code [maxLocals .. values.length)}.
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	45 * The top of the operand stack is at index {@code maxLocals + stackIndex}.
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	46 * This does not include the operand stack or local variables of parent frames.
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 * {@linkplain CiKind#isDoubleWord() Double-word} local variables and
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	49 * operand stack values occupy 2 slots in this array with the second slot
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	50 * being {@code null}.
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	51 */
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	52 protected final Value[] values;
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	53
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	54 /**
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	55 * The depth of the operand stack.
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	56 * The top of stack value is in {@code values[maxLocals + stackIndex]}.
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	57 */
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	58 protected int stackIndex;
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	59
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	60 /**
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	61 * The number of local variables.
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	62 */
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	63 protected final int maxLocals;
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 protected final IRScope scope;
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	66
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 * The bytecode index to which this frame state applies. This will be {@code -1}
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	69 * iff this state is mutable.
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 public final int bci;
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 /**
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	74 * The list of locks held by this frame state.
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	75 * This does not include locks held by parent frames.
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	76 */
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	77 protected ArrayList<Value> locks;
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	78
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 * The number of minimum stack slots required for doing IR wrangling during
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	81 * {@linkplain GraphBuilder bytecode parsing}. While this may hide stack
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	82 * overflow issues in the original bytecode, the assumption is that such
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	83 * issues must be caught by the verifier.
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 private static final int MINIMUM_STACK_SLOTS = 1;
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	86
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 * Creates a {@code FrameState} for the given scope and maximum number of stack and local variables.
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 * @param irScope the inlining context of the method
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	91 * @param bci the bytecode index of the frame state
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	92 * @param maxLocals maximum number of locals
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	93 * @param maxStack maximum size of the stack
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 public FrameState(IRScope irScope, int bci, int maxLocals, int maxStack) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	96 this.scope = irScope;
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	97 this.bci = bci;
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	98 this.values = new Value[maxLocals + Math.max(maxStack, MINIMUM_STACK_SLOTS)];
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	99 this.maxLocals = maxLocals;
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	100 C1XMetrics.FrameStatesCreated++;
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	101 C1XMetrics.FrameStateValuesCreated += this.values.length;
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
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	104 /**
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	105 * Copies the contents of this frame state so that further updates to either stack aren't reflected in the other.
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	106 * @param bci the bytecode index of the copy
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	107 * @param withLocals indicates whether to copy the local state
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	108 * @param withStack indicates whether to copy the stack state
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	109 * @param withLocks indicates whether to copy the lock state
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	110 *
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	111 * @return a new frame state with the specified components
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	112 */
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	113 public MutableFrameState copy(int bci, boolean withLocals, boolean withStack, boolean withLocks) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	114 final MutableFrameState other = new MutableFrameState(scope, bci, localsSize(), maxStackSize());
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	115 if (withLocals && withStack) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	116 // fast path: use array copy
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	117 int valuesSize = valuesSize();
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	118 assert other.values.length >= valuesSize : "array size: " + other.values.length + ", valuesSize: " + valuesSize + ", maxStackSize: " + maxStackSize() + ", localsSize: " + localsSize();
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	119 assert values.length >= valuesSize : "array size: " + values.length + ", valuesSize: " + valuesSize + ", maxStackSize: " + maxStackSize() + ", localsSize: " + localsSize();
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	120 System.arraycopy(values, 0, other.values, 0, valuesSize);
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	121 other.stackIndex = stackIndex;
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	122 } else {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	123 if (withLocals) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	124 other.replaceLocals(this);
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 if (withStack) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	127 other.replaceStack(this);
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 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	130 if (withLocks) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	131 other.replaceLocks(this);
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 return other;
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	134 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	135
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 * Gets a mutable copy ({@link MutableFrameState}) of this frame state.
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	138 */
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	139 public MutableFrameState copy() {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	140 return copy(bci, true, true, true);
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
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	143 /**
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	144 * Gets an immutable copy of this frame state but without the stack.
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	145 */
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	146 public FrameState immutableCopyWithEmptyStack() {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	147 return copy(bci, true, false, true);
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 /**
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	151 * Gets an immutable copy of this frame state but without the frame info.
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 FrameState immutableCopyCodePosOnly() {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	154 return copy(bci, false, false, false);
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 public boolean isSameAcrossScopes(FrameState other) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	158 assert stackSize() == other.stackSize();
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	159 assert localsSize() == other.localsSize();
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	160 assert locksSize() == other.locksSize();
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	161 for (int i = 0; i < stackIndex; i++) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	162 Value x = stackAt(i);
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	163 Value y = other.stackAt(i);
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	164 if (x != y && typeMismatch(x, y)) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	165 return false;
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	166 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	167 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	168 if (locks != null) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	169 for (int i = 0; i < locks.size(); i++) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	170 if (lockAt(i) != other.lockAt(i)) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	171 return false;
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 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	175 return true;
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
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	178 /**
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	179 * Returns the inlining context associated with this frame state.
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 * @return the inlining context
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	182 */
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	183 public IRScope scope() {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	184 return scope;
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	185 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	186
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	187 /**
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	188 * Returns the size of the local variables.
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 * @return the size of the local variables
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	191 */
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	192 public int localsSize() {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	193 return maxLocals;
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	194 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	195
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	196 /**
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	197 * Gets number of locks held by this frame state.
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 public int locksSize() {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	200 return locks == null ? 0 : locks.size();
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
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	203 public int totalLocksSize() {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	204 return locksSize() + ((callerState() == null) ? 0 : callerState().totalLocksSize());
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	205 }
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 * Gets the current size (height) of the stack.
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	209 */
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	210 public int stackSize() {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	211 return stackIndex;
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	212 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	213
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	214 /**
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	215 * Gets the maximum size (height) of the stack.
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 int maxStackSize() {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	218 return values.length - maxLocals;
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 /**
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	222 * Checks whether the stack is empty.
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 * @return {@code true} the stack is currently empty
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	225 */
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	226 public boolean stackEmpty() {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	227 return stackIndex == 0;
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 /**
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	231 * Invalidates the local variable at the specified index. If the specified index refers to a doubleword local, then
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	232 * invalidates the high word as well.
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	233 *
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	234 * @param i the index of the local to invalidate
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	235 */
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	236 public void invalidateLocal(int i) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	237 // note that for double word locals, the high slot should already be null
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	238 // unless the local is actually dead and the high slot is being reused;
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	239 // in either case, it is not necessary to null the high slot
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	240 values[i] = null;
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	241 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	242
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	243 /**
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	244 * Loads the local variable at the specified index.
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 * @param i the index of the local variable to load
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	247 * @return the instruction that produced the specified local
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	248 */
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	249 public Value loadLocal(int i) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	250 assert i < maxLocals : "local variable index out of range: " + i;
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	251 Value x = values[i];
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	252 if (x != null) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	253 if (x.isIllegal()) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	254 return null;
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 assert x.kind.isSingleWord() \|\| values[i + 1] == null \|\| values[i + 1] instanceof Phi;
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	257 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	258 return x;
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	259 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	260
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 * Stores a given local variable at the specified index. If the value is a {@linkplain CiKind#isDoubleWord() double word},
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	263 * then the next local variable index is also overwritten.
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	264 *
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	265 * @param i the index at which to store
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	266 * @param x the instruction which produces the value for the local
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	267 */
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	268 public void storeLocal(int i, Value x) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	269 assert i < maxLocals : "local variable index out of range: " + i;
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	270 invalidateLocal(i);
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	271 values[i] = x;
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	272 if (isDoubleWord(x)) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	273 // (tw) if this was a double word then kill i+1
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	274 values[i + 1] = null;
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 if (i > 0) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	277 // if there was a double word at i - 1, then kill it
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	278 Value p = values[i - 1];
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	279 if (isDoubleWord(p)) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	280 values[i - 1] = null;
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	281 }
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 /**
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	286 * Get the value on the stack at the specified stack index.
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 * @param i the index into the stack, with {@code 0} being the bottom of the stack
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	289 * @return the instruction at the specified position in the stack
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	290 */
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	291 public final Value stackAt(int i) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	292 assert i < stackIndex;
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	293 return values[i + maxLocals];
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	294 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	295
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	296 /**
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	297 * Gets the value in the local variables at the specified index.
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	298 *
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	299 * @param i the index into the locals
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	300 * @return the instruction that produced the value for the specified local
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	301 */
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	302 public final Value localAt(int i) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	303 assert i < maxLocals : "local variable index out of range: " + i;
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	304 return values[i];
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	305 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	306
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	307 /**
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	308 * Retrieves the lock at the specified index in the lock stack.
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	309 * @param i the index into the lock stack
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	310 * @return the instruction which produced the object at the specified location in the lock stack
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 public final Value lockAt(int i) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	313 return locks.get(i);
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	314 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	315
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	316 /**
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	317 * Inserts a phi statement into the stack at the specified stack index.
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	318 * @param block the block begin for which we are creating the phi
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	319 * @param i the index into the stack for which to create a phi
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 public void setupPhiForStack(BlockBegin block, int i) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	322 Value p = stackAt(i);
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	323 if (p != null) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	324 if (p instanceof Phi) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	325 Phi phi = (Phi) p;
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	326 if (phi.block() == block && phi.isOnStack() && phi.stackIndex() == i) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	327 return;
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	328 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	329 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	330 values[maxLocals + i] = new Phi(p.kind, block, -i - 1);
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	331 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	332 }
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 * Inserts a phi statement for the local at the specified index.
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	336 * @param block the block begin for which we are creating the phi
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	337 * @param i the index of the local variable for which to create the phi
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	338 */
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	339 public void setupPhiForLocal(BlockBegin block, int i) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	340 Value p = values[i];
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	341 if (p instanceof Phi) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	342 Phi phi = (Phi) p;
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	343 if (phi.block() == block && phi.isLocal() && phi.localIndex() == i) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	344 return;
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	345 }
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 storeLocal(i, new Phi(p.kind, block, i));
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	348 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	349
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	350 /**
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	351 * Gets the value at a specified index in the set of operand stack and local values represented by this frame.
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	352 * This method should only be used to iterate over all the values in this frame, irrespective of whether
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	353 * they are on the stack or in local variables.
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	354 * To iterate the stack slots, the {@link #stackAt(int)} and {@link #stackSize()} methods should be used.
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	355 * To iterate the local variables, the {@link #localAt(int)} and {@link #localsSize()} methods should be used.
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 * @param i a value in the range {@code [0 .. valuesSize()]}
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	358 * @return the value at index {@code i} which may be {@code null}
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 public final Value valueAt(int i) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	361 return values[i];
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	362 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	363
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 * The number of operand stack slots and local variables in this frame.
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	366 * This method should typically only be used in conjunction with {@link #valueAt(int)}.
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	367 * To iterate the stack slots, the {@link #stackAt(int)} and {@link #stackSize()} methods should be used.
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	368 * To iterate the local variables, the {@link #localAt(int)} and {@link #localsSize()} methods should be used.
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 * @return the number of local variables in this frame
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	371 */
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	372 public final int valuesSize() {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	373 return maxLocals + stackIndex;
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
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	376 public final int callerStackSize() {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	377 FrameState callerState = scope().callerState;
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	378 return callerState == null ? 0 : callerState.stackSize();
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	379 }
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 public void checkPhis(BlockBegin block, FrameState other) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	382 checkSize(other);
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	383 final int max = valuesSize();
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	384 for (int i = 0; i < max; i++) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	385 Value x = values[i];
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	386 Value y = other.values[i];
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	387 if (x != null && x != y) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	388 if (x instanceof Phi) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	389 Phi phi = (Phi) x;
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	390 if (phi.block() == block) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	391 for (int j = 0; j < phi.inputCount(); j++) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	392 if (phi.inputIn(other) == null) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	393 throw new CiBailout("phi " + phi + " has null operand at new predecessor");
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	394 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	395 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	396 continue;
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 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	399 throw new CiBailout("instruction is not a phi or null at " + i);
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 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	402 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	403
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	404 private void checkSize(FrameState other) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	405 if (other.stackIndex != stackIndex) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	406 throw new CiBailout("stack sizes do not match");
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	407 } else if (other.maxLocals != maxLocals) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	408 throw new CiBailout("local sizes do not match");
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	409 }
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
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	412 public void merge(BlockBegin block, FrameState other) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	413 checkSize(other);
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	414 for (int i = 0; i < valuesSize(); i++) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	415 Value x = values[i];
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	416 if (x != null) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	417 Value y = other.values[i];
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	418 if (x != y) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	419 if (typeMismatch(x, y)) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	420 if (x instanceof Phi) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	421 Phi phi = (Phi) x;
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	422 if (phi.block() == block) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	423 phi.makeDead();
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	424 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	425 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	426 values[i] = null;
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	427 continue;
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	428 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	429 if (i < maxLocals) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	430 // this a local
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	431 setupPhiForLocal(block, i);
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	432 } else {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	433 // this is a stack slot
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	434 setupPhiForStack(block, i - maxLocals);
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	435 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	436 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	437 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	438 }
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
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	441 private static boolean typeMismatch(Value x, Value y) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	442 return y == null \|\| x.kind != y.kind;
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	443 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	444
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	445 private static boolean isDoubleWord(Value x) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	446 return x != null && x.kind.isDoubleWord();
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	447 }
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 * The interface implemented by a client of {@link FrameState#forEachPhi(BlockBegin, PhiProcedure)} and
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	451 * {@link FrameState#forEachLivePhi(BlockBegin, PhiProcedure)}.
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 public static interface PhiProcedure {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	454 boolean doPhi(Phi phi);
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	455 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	456
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	457 /**
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	458 * Traverses all {@linkplain Phi phis} of a given block in this frame state.
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	459 *
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	460 * @param block only phis {@linkplain Phi#block() associated} with this block are traversed
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	461 * @param proc the call back invoked for each live phi traversed
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	462 */
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	463 public boolean forEachPhi(BlockBegin block, PhiProcedure proc) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	464 int max = this.valuesSize();
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	465 for (int i = 0; i < max; i++) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	466 Value instr = values[i];
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	467 if (instr instanceof Phi && !instr.isDeadPhi()) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	468 Phi phi = (Phi) instr;
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	469 if (block == null \|\| phi.block() == block) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	470 if (!proc.doPhi(phi)) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	471 return false;
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	472 }
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 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	475 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	476 return true;
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	477 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	478
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	479 /**
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	480 * Traverses all live {@linkplain Phi phis} of a given block in this frame state.
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	481 *
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	482 * @param block only phis {@linkplain Phi#block() associated} with this block are traversed
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	483 * @param proc the call back invoked for each live phi traversed
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	484 */
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	485 public final boolean forEachLivePhi(BlockBegin block, PhiProcedure proc) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	486 int max = this.valuesSize();
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	487 for (int i = 0; i < max; i++) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	488 Value instr = values[i];
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	489 if (instr instanceof Phi && instr.isLive() && !instr.isDeadPhi()) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	490 Phi phi = (Phi) instr;
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	491 if (block == null \|\| phi.block() == block) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	492 if (!proc.doPhi(phi)) {
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	493 return false;
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 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	497 }
9ec15d6914ca Pull over of compiler from maxine repository. Thomas Wuerthinger <thomas@wuerthinger.net> parents: diff changeset	498 return true;
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

2507

9ec15d6914ca Pull over of compiler from maxine repository.