Mercurial > hg > graal-compiler
comparison graal/GraalCompiler/src/com/sun/c1x/ir/Value.java @ 2805:c3f64b66fc78
Towards removing the next pointer from Constant and ArithmeticOp
| author | Thomas Wuerthinger <thomas@wuerthinger.net> |
|---|---|
| date | Fri, 27 May 2011 19:57:56 +0200 |
| parents | 095162a84dcc |
| children | 015be60afcf3 |
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| 2804:095162a84dcc | 2805:c3f64b66fc78 |
|---|---|
| 53 * A mask of {@linkplain Flag flags} denoting extra properties of this value. | 53 * A mask of {@linkplain Flag flags} denoting extra properties of this value. |
| 54 */ | 54 */ |
| 55 private int flags; | 55 private int flags; |
| 56 | 56 |
| 57 protected CiValue operand = CiValue.IllegalValue; | 57 protected CiValue operand = CiValue.IllegalValue; |
| 58 | |
| 59 public abstract Merge block(); | |
| 60 | 58 |
| 61 /** | 59 /** |
| 62 * Creates a new value with the specified kind. | 60 * Creates a new value with the specified kind. |
| 63 * @param kind the type of this value | 61 * @param kind the type of this value |
| 64 * @param inputCount | 62 * @param inputCount |
| 264 public final boolean isDeadPhi() { | 262 public final boolean isDeadPhi() { |
| 265 return checkFlag(Flag.PhiDead); | 263 return checkFlag(Flag.PhiDead); |
| 266 } | 264 } |
| 267 | 265 |
| 268 /** | 266 /** |
| 267 * Compute the value number of this Instruction. Local and global value numbering | |
| 268 * optimizations use a hash map, and the value number provides a hash code. | |
| 269 * If the instruction cannot be value numbered, then this method should return | |
| 270 * {@code 0}. | |
| 271 * @return the hashcode of this instruction | |
| 272 */ | |
| 273 public int valueNumber() { | |
| 274 return 0; | |
| 275 } | |
| 276 | |
| 277 /** | |
| 278 * Checks that this instruction is equal to another instruction for the purposes | |
| 279 * of value numbering. | |
| 280 * @param i the other instruction | |
| 281 * @return {@code true} if this instruction is equivalent to the specified | |
| 282 * instruction w.r.t. value numbering | |
| 283 */ | |
| 284 public boolean valueEqual(Node i) { | |
| 285 return false; | |
| 286 } | |
| 287 | |
| 288 /** | |
| 269 * This method supports the visitor pattern by accepting a visitor and calling the | 289 * This method supports the visitor pattern by accepting a visitor and calling the |
| 270 * appropriate {@code visit()} method. | 290 * appropriate {@code visit()} method. |
| 271 * | 291 * |
| 272 * @param v the visitor to accept | 292 * @param v the visitor to accept |
| 273 */ | 293 */ |