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comparison graal/GraalCompiler/src/com/sun/c1x/ir/Merge.java @ 2823:ac4b086cbd72

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Merge
author Gilles Duboscq <gilles.duboscq@oracle.com>
date Mon, 30 May 2011 16:35:08 +0200
parents 530366123e46 c3f64b66fc78
children d54ea877a302
comparison
equal deleted inserted replaced
2822:530366123e46 2823:ac4b086cbd72
31 /** 31 /**
32 * Denotes the beginning of a basic block, and holds information 32 * Denotes the beginning of a basic block, and holds information
33 * about the basic block, including the successor and 33 * about the basic block, including the successor and
34 * predecessor blocks, exception handlers, liveness information, etc. 34 * predecessor blocks, exception handlers, liveness information, etc.
35 */ 35 */
36 public final class Merge extends StateSplit { 36 public class Merge extends StateSplit {
37 37
38 private static final int INPUT_COUNT = 0; 38 private static final int INPUT_COUNT = 0;
39 39
40 private static final int SUCCESSOR_COUNT = 0; 40 private static final int SUCCESSOR_COUNT = 0;
41 41
51 51
52 @Override 52 @Override
53 public boolean needsStateAfter() { 53 public boolean needsStateAfter() {
54 return false; 54 return false;
55 } 55 }
56
57 public final boolean isLoopHeader;
58
59 /**
60 * Index of bytecode that generated this node when appended in a basic block.
61 * Negative values indicate special cases.
62 */
63 private int bci;
64 56
65 /** 57 /**
66 * Constructs a new Merge at the specified bytecode index. 58 * Constructs a new Merge at the specified bytecode index.
67 * @param bci the bytecode index of the start 59 * @param bci the bytecode index of the start
68 * @param blockID the ID of the block 60 * @param blockID the ID of the block
69 * @param graph 61 * @param graph
70 */ 62 */
71 public Merge(int bci, boolean isLoopHeader, Graph graph) { 63 public Merge(Graph graph) {
72 super(CiKind.Illegal, INPUT_COUNT, SUCCESSOR_COUNT, graph); 64 super(CiKind.Illegal, INPUT_COUNT, SUCCESSOR_COUNT, graph);
73 this.bci = bci; 65 }
74 this.isLoopHeader = isLoopHeader; 66
75 } 67 protected Merge(int inputCount, int successorCount, Graph graph) {
76 68 super(CiKind.Illegal, inputCount + INPUT_COUNT, successorCount + SUCCESSOR_COUNT, graph);
77 /**
78 * Gets the bytecode index of this instruction.
79 * @return the bytecode index of this instruction
80 */
81 public int bci() {
82 return bci;
83 } 69 }
84 70
85 @Override 71 @Override
86 public void accept(ValueVisitor v) { 72 public void accept(ValueVisitor v) {
87 v.visitMerge(this); 73 v.visitMerge(this);
93 builder.append("merge #"); 79 builder.append("merge #");
94 builder.append(id()); 80 builder.append(id());
95 builder.append(" ["); 81 builder.append(" [");
96 82
97 builder.append("]"); 83 builder.append("]");
98 //if (end() != null) { 84
99 builder.append(" -> "); 85 builder.append(" -> ");
100 boolean hasSucc = false; 86 boolean hasSucc = false;
101 for (Node s : this.successors()) { 87 for (Node s : this.successors()) {
102 if (s == null) { 88 if (hasSucc) {
103 continue; 89 builder.append(", ");
104 } 90 }
105 if (hasSucc) { 91 builder.append("#");
106 builder.append(", "); 92 if (s != null) {
107 }
108 builder.append("#");
109 builder.append(s.id()); 93 builder.append(s.id());
110 hasSucc = true; 94 } else {
111 } 95 builder.append("null");
112 //} 96 }
97 hasSucc = true;
98 }
99
113 return builder.toString(); 100 return builder.toString();
114 } 101 }
115 102
116 public void printWithoutPhis(LogStream out) { 103 public void printWithoutPhis(LogStream out) {
117 // print block id 104 // print block id
137 } 124 }
138 } 125 }
139 //} 126 //}
140 127
141 // print predecessors 128 // print predecessors
142 if (!blockPredecessors().isEmpty()) { 129 // if (!blockPredecessors().isEmpty()) {
143 out.print(" pred:"); 130 // out.print(" pred:");
144 for (Instruction pred : blockPredecessors()) { 131 // for (Instruction pred : blockPredecessors()) {
145 out.print(pred.block()); 132 // out.print(pred.block());
146 } 133 // }
147 } 134 // }
148 } 135 }
149 136
150 @Override 137 @Override
151 public void print(LogStream out) { 138 public void print(LogStream out) {
152 139
259 } 246 }
260 } 247 }
261 sb.append("] "); 248 sb.append("] ");
262 } 249 }
263 } 250 }
264 if (value != null && value.hasSubst()) {
265 sb.append("alias ").append(Util.valueString(value.subst()));
266 }
267 return sb.toString(); 251 return sb.toString();
268 } 252 }
269 253
270 @Override 254 @Override
271 public String shortName() { 255 public String shortName() {