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annotate src/share/vm/opto/node.hpp @ 196:d1605aabd0a1 jdk7-b30
6719955: Update copyright year
Summary: Update copyright year for files that have been modified in 2008
Reviewed-by: ohair, tbell
| author | xdono |
|---|---|
| date | Wed, 02 Jul 2008 12:55:16 -0700 |
| parents | 7793bd37a336 |
| children | 02a35ad4adf8 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 196 | 2 * Copyright 1997-2008 Sun Microsystems, Inc. All Rights Reserved. |
| 0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
| 19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
| 20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
| 21 * have any questions. | |
| 22 * | |
| 23 */ | |
| 24 | |
| 25 // Portions of code courtesy of Clifford Click | |
| 26 | |
| 27 // Optimization - Graph Style | |
| 28 | |
| 29 | |
| 30 class AbstractLockNode; | |
| 31 class AddNode; | |
| 32 class AddPNode; | |
| 33 class AliasInfo; | |
| 34 class AllocateArrayNode; | |
| 35 class AllocateNode; | |
| 36 class Block; | |
| 37 class Block_Array; | |
| 38 class BoolNode; | |
| 39 class BoxLockNode; | |
| 40 class CMoveNode; | |
| 41 class CallDynamicJavaNode; | |
| 42 class CallJavaNode; | |
| 43 class CallLeafNode; | |
| 44 class CallNode; | |
| 45 class CallRuntimeNode; | |
| 46 class CallStaticJavaNode; | |
| 47 class CatchNode; | |
| 48 class CatchProjNode; | |
| 49 class CheckCastPPNode; | |
| 50 class CmpNode; | |
| 51 class CodeBuffer; | |
| 52 class ConstraintCastNode; | |
| 53 class ConNode; | |
| 54 class CountedLoopNode; | |
| 55 class CountedLoopEndNode; | |
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56 class DecodeNNode; |
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57 class EncodePNode; |
| 0 | 58 class FastLockNode; |
| 59 class FastUnlockNode; | |
| 60 class IfNode; | |
| 61 class InitializeNode; | |
| 62 class JVMState; | |
| 63 class JumpNode; | |
| 64 class JumpProjNode; | |
| 65 class LoadNode; | |
| 66 class LoadStoreNode; | |
| 67 class LockNode; | |
| 68 class LoopNode; | |
| 69 class MachCallDynamicJavaNode; | |
| 70 class MachCallJavaNode; | |
| 71 class MachCallLeafNode; | |
| 72 class MachCallNode; | |
| 73 class MachCallRuntimeNode; | |
| 74 class MachCallStaticJavaNode; | |
| 75 class MachIfNode; | |
| 76 class MachNode; | |
| 77 class MachNullCheckNode; | |
| 78 class MachReturnNode; | |
| 79 class MachSafePointNode; | |
| 80 class MachSpillCopyNode; | |
| 81 class MachTempNode; | |
| 82 class Matcher; | |
| 83 class MemBarNode; | |
| 84 class MemNode; | |
| 85 class MergeMemNode; | |
| 86 class MulNode; | |
| 87 class MultiNode; | |
| 88 class MultiBranchNode; | |
| 89 class NeverBranchNode; | |
| 90 class Node; | |
| 91 class Node_Array; | |
| 92 class Node_List; | |
| 93 class Node_Stack; | |
| 94 class NullCheckNode; | |
| 95 class OopMap; | |
| 33 | 96 class ParmNode; |
| 0 | 97 class PCTableNode; |
| 98 class PhaseCCP; | |
| 99 class PhaseGVN; | |
| 100 class PhaseIterGVN; | |
| 101 class PhaseRegAlloc; | |
| 102 class PhaseTransform; | |
| 103 class PhaseValues; | |
| 104 class PhiNode; | |
| 105 class Pipeline; | |
| 106 class ProjNode; | |
| 107 class RegMask; | |
| 108 class RegionNode; | |
| 109 class RootNode; | |
| 110 class SafePointNode; | |
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111 class SafePointScalarObjectNode; |
| 0 | 112 class StartNode; |
| 113 class State; | |
| 114 class StoreNode; | |
| 115 class SubNode; | |
| 116 class Type; | |
| 117 class TypeNode; | |
| 118 class UnlockNode; | |
| 119 class VectorSet; | |
| 120 class IfTrueNode; | |
| 121 class IfFalseNode; | |
| 122 typedef void (*NFunc)(Node&,void*); | |
| 123 extern "C" { | |
| 124 typedef int (*C_sort_func_t)(const void *, const void *); | |
| 125 } | |
| 126 | |
| 127 // The type of all node counts and indexes. | |
| 128 // It must hold at least 16 bits, but must also be fast to load and store. | |
| 129 // This type, if less than 32 bits, could limit the number of possible nodes. | |
| 130 // (To make this type platform-specific, move to globalDefinitions_xxx.hpp.) | |
| 131 typedef unsigned int node_idx_t; | |
| 132 | |
| 133 | |
| 134 #ifndef OPTO_DU_ITERATOR_ASSERT | |
| 135 #ifdef ASSERT | |
| 136 #define OPTO_DU_ITERATOR_ASSERT 1 | |
| 137 #else | |
| 138 #define OPTO_DU_ITERATOR_ASSERT 0 | |
| 139 #endif | |
| 140 #endif //OPTO_DU_ITERATOR_ASSERT | |
| 141 | |
| 142 #if OPTO_DU_ITERATOR_ASSERT | |
| 143 class DUIterator; | |
| 144 class DUIterator_Fast; | |
| 145 class DUIterator_Last; | |
| 146 #else | |
| 147 typedef uint DUIterator; | |
| 148 typedef Node** DUIterator_Fast; | |
| 149 typedef Node** DUIterator_Last; | |
| 150 #endif | |
| 151 | |
| 152 // Node Sentinel | |
| 153 #define NodeSentinel (Node*)-1 | |
| 154 | |
| 155 // Unknown count frequency | |
| 156 #define COUNT_UNKNOWN (-1.0f) | |
| 157 | |
| 158 //------------------------------Node------------------------------------------- | |
| 159 // Nodes define actions in the program. They create values, which have types. | |
| 160 // They are both vertices in a directed graph and program primitives. Nodes | |
| 161 // are labeled; the label is the "opcode", the primitive function in the lambda | |
| 162 // calculus sense that gives meaning to the Node. Node inputs are ordered (so | |
| 163 // that "a-b" is different from "b-a"). The inputs to a Node are the inputs to | |
| 164 // the Node's function. These inputs also define a Type equation for the Node. | |
| 165 // Solving these Type equations amounts to doing dataflow analysis. | |
| 166 // Control and data are uniformly represented in the graph. Finally, Nodes | |
| 167 // have a unique dense integer index which is used to index into side arrays | |
| 168 // whenever I have phase-specific information. | |
| 169 | |
| 170 class Node { | |
| 171 // Lots of restrictions on cloning Nodes | |
| 172 Node(const Node&); // not defined; linker error to use these | |
| 173 Node &operator=(const Node &rhs); | |
| 174 | |
| 175 public: | |
| 176 friend class Compile; | |
| 177 #if OPTO_DU_ITERATOR_ASSERT | |
| 178 friend class DUIterator_Common; | |
| 179 friend class DUIterator; | |
| 180 friend class DUIterator_Fast; | |
| 181 friend class DUIterator_Last; | |
| 182 #endif | |
| 183 | |
| 184 // Because Nodes come and go, I define an Arena of Node structures to pull | |
| 185 // from. This should allow fast access to node creation & deletion. This | |
| 186 // field is a local cache of a value defined in some "program fragment" for | |
| 187 // which these Nodes are just a part of. | |
| 188 | |
| 189 // New Operator that takes a Compile pointer, this will eventually | |
| 190 // be the "new" New operator. | |
| 191 inline void* operator new( size_t x, Compile* C) { | |
| 192 Node* n = (Node*)C->node_arena()->Amalloc_D(x); | |
| 193 #ifdef ASSERT | |
| 194 n->_in = (Node**)n; // magic cookie for assertion check | |
| 195 #endif | |
| 196 n->_out = (Node**)C; | |
| 197 return (void*)n; | |
| 198 } | |
| 199 | |
| 200 // New Operator that takes a Compile pointer, this will eventually | |
| 201 // be the "new" New operator. | |
| 202 inline void* operator new( size_t x, Compile* C, int y) { | |
| 203 Node* n = (Node*)C->node_arena()->Amalloc_D(x + y*sizeof(void*)); | |
| 204 n->_in = (Node**)(((char*)n) + x); | |
| 205 #ifdef ASSERT | |
| 206 n->_in[y-1] = n; // magic cookie for assertion check | |
| 207 #endif | |
| 208 n->_out = (Node**)C; | |
| 209 return (void*)n; | |
| 210 } | |
| 211 | |
| 212 // Delete is a NOP | |
| 213 void operator delete( void *ptr ) {} | |
| 214 // Fancy destructor; eagerly attempt to reclaim Node numberings and storage | |
| 215 void destruct(); | |
| 216 | |
| 217 // Create a new Node. Required is the number is of inputs required for | |
| 218 // semantic correctness. | |
| 219 Node( uint required ); | |
| 220 | |
| 221 // Create a new Node with given input edges. | |
| 222 // This version requires use of the "edge-count" new. | |
| 223 // E.g. new (C,3) FooNode( C, NULL, left, right ); | |
| 224 Node( Node *n0 ); | |
| 225 Node( Node *n0, Node *n1 ); | |
| 226 Node( Node *n0, Node *n1, Node *n2 ); | |
| 227 Node( Node *n0, Node *n1, Node *n2, Node *n3 ); | |
| 228 Node( Node *n0, Node *n1, Node *n2, Node *n3, Node *n4 ); | |
| 229 Node( Node *n0, Node *n1, Node *n2, Node *n3, Node *n4, Node *n5 ); | |
| 230 Node( Node *n0, Node *n1, Node *n2, Node *n3, | |
| 231 Node *n4, Node *n5, Node *n6 ); | |
| 232 | |
| 233 // Clone an inherited Node given only the base Node type. | |
| 234 Node* clone() const; | |
| 235 | |
| 236 // Clone a Node, immediately supplying one or two new edges. | |
| 237 // The first and second arguments, if non-null, replace in(1) and in(2), | |
| 238 // respectively. | |
| 239 Node* clone_with_data_edge(Node* in1, Node* in2 = NULL) const { | |
| 240 Node* nn = clone(); | |
| 241 if (in1 != NULL) nn->set_req(1, in1); | |
| 242 if (in2 != NULL) nn->set_req(2, in2); | |
| 243 return nn; | |
| 244 } | |
| 245 | |
| 246 private: | |
| 247 // Shared setup for the above constructors. | |
| 248 // Handles all interactions with Compile::current. | |
| 249 // Puts initial values in all Node fields except _idx. | |
| 250 // Returns the initial value for _idx, which cannot | |
| 251 // be initialized by assignment. | |
| 252 inline int Init(int req, Compile* C); | |
| 253 | |
| 254 //----------------- input edge handling | |
| 255 protected: | |
| 256 friend class PhaseCFG; // Access to address of _in array elements | |
| 257 Node **_in; // Array of use-def references to Nodes | |
| 258 Node **_out; // Array of def-use references to Nodes | |
| 259 | |
| 260 // Input edges are split into two catagories. Required edges are required | |
| 261 // for semantic correctness; order is important and NULLs are allowed. | |
| 262 // Precedence edges are used to help determine execution order and are | |
| 263 // added, e.g., for scheduling purposes. They are unordered and not | |
| 264 // duplicated; they have no embedded NULLs. Edges from 0 to _cnt-1 | |
| 265 // are required, from _cnt to _max-1 are precedence edges. | |
| 266 node_idx_t _cnt; // Total number of required Node inputs. | |
| 267 | |
| 268 node_idx_t _max; // Actual length of input array. | |
| 269 | |
| 270 // Output edges are an unordered list of def-use edges which exactly | |
| 271 // correspond to required input edges which point from other nodes | |
| 272 // to this one. Thus the count of the output edges is the number of | |
| 273 // users of this node. | |
| 274 node_idx_t _outcnt; // Total number of Node outputs. | |
| 275 | |
| 276 node_idx_t _outmax; // Actual length of output array. | |
| 277 | |
| 278 // Grow the actual input array to the next larger power-of-2 bigger than len. | |
| 279 void grow( uint len ); | |
| 280 // Grow the output array to the next larger power-of-2 bigger than len. | |
| 281 void out_grow( uint len ); | |
| 282 | |
| 283 public: | |
| 284 // Each Node is assigned a unique small/dense number. This number is used | |
| 285 // to index into auxiliary arrays of data and bitvectors. | |
| 286 // It is declared const to defend against inadvertant assignment, | |
| 287 // since it is used by clients as a naked field. | |
| 288 const node_idx_t _idx; | |
| 289 | |
| 290 // Get the (read-only) number of input edges | |
| 291 uint req() const { return _cnt; } | |
| 292 uint len() const { return _max; } | |
| 293 // Get the (read-only) number of output edges | |
| 294 uint outcnt() const { return _outcnt; } | |
| 295 | |
| 296 #if OPTO_DU_ITERATOR_ASSERT | |
| 297 // Iterate over the out-edges of this node. Deletions are illegal. | |
| 298 inline DUIterator outs() const; | |
| 299 // Use this when the out array might have changed to suppress asserts. | |
| 300 inline DUIterator& refresh_out_pos(DUIterator& i) const; | |
| 301 // Does the node have an out at this position? (Used for iteration.) | |
| 302 inline bool has_out(DUIterator& i) const; | |
| 303 inline Node* out(DUIterator& i) const; | |
| 304 // Iterate over the out-edges of this node. All changes are illegal. | |
| 305 inline DUIterator_Fast fast_outs(DUIterator_Fast& max) const; | |
| 306 inline Node* fast_out(DUIterator_Fast& i) const; | |
| 307 // Iterate over the out-edges of this node, deleting one at a time. | |
| 308 inline DUIterator_Last last_outs(DUIterator_Last& min) const; | |
| 309 inline Node* last_out(DUIterator_Last& i) const; | |
| 310 // The inline bodies of all these methods are after the iterator definitions. | |
| 311 #else | |
| 312 // Iterate over the out-edges of this node. Deletions are illegal. | |
| 313 // This iteration uses integral indexes, to decouple from array reallocations. | |
| 314 DUIterator outs() const { return 0; } | |
| 315 // Use this when the out array might have changed to suppress asserts. | |
| 316 DUIterator refresh_out_pos(DUIterator i) const { return i; } | |
| 317 | |
| 318 // Reference to the i'th output Node. Error if out of bounds. | |
| 319 Node* out(DUIterator i) const { assert(i < _outcnt, "oob"); return _out[i]; } | |
| 320 // Does the node have an out at this position? (Used for iteration.) | |
| 321 bool has_out(DUIterator i) const { return i < _outcnt; } | |
| 322 | |
| 323 // Iterate over the out-edges of this node. All changes are illegal. | |
| 324 // This iteration uses a pointer internal to the out array. | |
| 325 DUIterator_Fast fast_outs(DUIterator_Fast& max) const { | |
| 326 Node** out = _out; | |
| 327 // Assign a limit pointer to the reference argument: | |
| 328 max = out + (ptrdiff_t)_outcnt; | |
| 329 // Return the base pointer: | |
| 330 return out; | |
| 331 } | |
| 332 Node* fast_out(DUIterator_Fast i) const { return *i; } | |
| 333 // Iterate over the out-edges of this node, deleting one at a time. | |
| 334 // This iteration uses a pointer internal to the out array. | |
| 335 DUIterator_Last last_outs(DUIterator_Last& min) const { | |
| 336 Node** out = _out; | |
| 337 // Assign a limit pointer to the reference argument: | |
| 338 min = out; | |
| 339 // Return the pointer to the start of the iteration: | |
| 340 return out + (ptrdiff_t)_outcnt - 1; | |
| 341 } | |
| 342 Node* last_out(DUIterator_Last i) const { return *i; } | |
| 343 #endif | |
| 344 | |
| 345 // Reference to the i'th input Node. Error if out of bounds. | |
| 346 Node* in(uint i) const { assert(i < _max,"oob"); return _in[i]; } | |
| 347 // Reference to the i'th output Node. Error if out of bounds. | |
| 348 // Use this accessor sparingly. We are going trying to use iterators instead. | |
| 349 Node* raw_out(uint i) const { assert(i < _outcnt,"oob"); return _out[i]; } | |
| 350 // Return the unique out edge. | |
| 351 Node* unique_out() const { assert(_outcnt==1,"not unique"); return _out[0]; } | |
| 352 // Delete out edge at position 'i' by moving last out edge to position 'i' | |
| 353 void raw_del_out(uint i) { | |
| 354 assert(i < _outcnt,"oob"); | |
| 355 assert(_outcnt > 0,"oob"); | |
| 356 #if OPTO_DU_ITERATOR_ASSERT | |
| 357 // Record that a change happened here. | |
| 358 debug_only(_last_del = _out[i]; ++_del_tick); | |
| 359 #endif | |
| 360 _out[i] = _out[--_outcnt]; | |
| 361 // Smash the old edge so it can't be used accidentally. | |
| 362 debug_only(_out[_outcnt] = (Node *)(uintptr_t)0xdeadbeef); | |
| 363 } | |
| 364 | |
| 365 #ifdef ASSERT | |
| 366 bool is_dead() const; | |
| 367 #define is_not_dead(n) ((n) == NULL || !VerifyIterativeGVN || !((n)->is_dead())) | |
| 368 #endif | |
| 369 | |
| 370 // Set a required input edge, also updates corresponding output edge | |
| 371 void add_req( Node *n ); // Append a NEW required input | |
| 372 void add_req_batch( Node* n, uint m ); // Append m NEW required inputs (all n). | |
| 373 void del_req( uint idx ); // Delete required edge & compact | |
| 374 void ins_req( uint i, Node *n ); // Insert a NEW required input | |
| 375 void set_req( uint i, Node *n ) { | |
| 376 assert( is_not_dead(n), "can not use dead node"); | |
| 377 assert( i < _cnt, "oob"); | |
| 378 assert( !VerifyHashTableKeys || _hash_lock == 0, | |
| 379 "remove node from hash table before modifying it"); | |
| 380 Node** p = &_in[i]; // cache this._in, across the del_out call | |
| 381 if (*p != NULL) (*p)->del_out((Node *)this); | |
| 382 (*p) = n; | |
| 383 if (n != NULL) n->add_out((Node *)this); | |
| 384 } | |
| 385 // Light version of set_req() to init inputs after node creation. | |
| 386 void init_req( uint i, Node *n ) { | |
| 387 assert( i == 0 && this == n || | |
| 388 is_not_dead(n), "can not use dead node"); | |
| 389 assert( i < _cnt, "oob"); | |
| 390 assert( !VerifyHashTableKeys || _hash_lock == 0, | |
| 391 "remove node from hash table before modifying it"); | |
| 392 assert( _in[i] == NULL, "sanity"); | |
| 393 _in[i] = n; | |
| 394 if (n != NULL) n->add_out((Node *)this); | |
| 395 } | |
| 396 // Find first occurrence of n among my edges: | |
| 397 int find_edge(Node* n); | |
| 398 int replace_edge(Node* old, Node* neww); | |
| 399 // NULL out all inputs to eliminate incoming Def-Use edges. | |
| 400 // Return the number of edges between 'n' and 'this' | |
| 401 int disconnect_inputs(Node *n); | |
| 402 | |
| 403 // Quickly, return true if and only if I am Compile::current()->top(). | |
| 404 bool is_top() const { | |
| 405 assert((this == (Node*) Compile::current()->top()) == (_out == NULL), ""); | |
| 406 return (_out == NULL); | |
| 407 } | |
| 408 // Reaffirm invariants for is_top. (Only from Compile::set_cached_top_node.) | |
| 409 void setup_is_top(); | |
| 410 | |
| 411 // Strip away casting. (It is depth-limited.) | |
| 412 Node* uncast() const; | |
| 413 | |
| 414 private: | |
| 415 static Node* uncast_helper(const Node* n); | |
| 416 | |
| 417 // Add an output edge to the end of the list | |
| 418 void add_out( Node *n ) { | |
| 419 if (is_top()) return; | |
| 420 if( _outcnt == _outmax ) out_grow(_outcnt); | |
| 421 _out[_outcnt++] = n; | |
| 422 } | |
| 423 // Delete an output edge | |
| 424 void del_out( Node *n ) { | |
| 425 if (is_top()) return; | |
| 426 Node** outp = &_out[_outcnt]; | |
| 427 // Find and remove n | |
| 428 do { | |
| 429 assert(outp > _out, "Missing Def-Use edge"); | |
| 430 } while (*--outp != n); | |
| 431 *outp = _out[--_outcnt]; | |
| 432 // Smash the old edge so it can't be used accidentally. | |
| 433 debug_only(_out[_outcnt] = (Node *)(uintptr_t)0xdeadbeef); | |
| 434 // Record that a change happened here. | |
| 435 #if OPTO_DU_ITERATOR_ASSERT | |
| 436 debug_only(_last_del = n; ++_del_tick); | |
| 437 #endif | |
| 438 } | |
| 439 | |
| 440 public: | |
| 441 // Globally replace this node by a given new node, updating all uses. | |
| 442 void replace_by(Node* new_node); | |
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443 // Globally replace this node by a given new node, updating all uses |
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444 // and cutting input edges of old node. |
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445 void subsume_by(Node* new_node) { |
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446 replace_by(new_node); |
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447 disconnect_inputs(NULL); |
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448 } |
| 0 | 449 void set_req_X( uint i, Node *n, PhaseIterGVN *igvn ); |
| 450 // Find the one non-null required input. RegionNode only | |
| 451 Node *nonnull_req() const; | |
| 452 // Add or remove precedence edges | |
| 453 void add_prec( Node *n ); | |
| 454 void rm_prec( uint i ); | |
| 455 void set_prec( uint i, Node *n ) { | |
| 456 assert( is_not_dead(n), "can not use dead node"); | |
| 457 assert( i >= _cnt, "not a precedence edge"); | |
| 458 if (_in[i] != NULL) _in[i]->del_out((Node *)this); | |
| 459 _in[i] = n; | |
| 460 if (n != NULL) n->add_out((Node *)this); | |
| 461 } | |
| 462 // Set this node's index, used by cisc_version to replace current node | |
| 463 void set_idx(uint new_idx) { | |
| 464 const node_idx_t* ref = &_idx; | |
| 465 *(node_idx_t*)ref = new_idx; | |
| 466 } | |
| 467 // Swap input edge order. (Edge indexes i1 and i2 are usually 1 and 2.) | |
| 468 void swap_edges(uint i1, uint i2) { | |
| 469 debug_only(uint check_hash = (VerifyHashTableKeys && _hash_lock) ? hash() : NO_HASH); | |
| 470 // Def-Use info is unchanged | |
| 471 Node* n1 = in(i1); | |
| 472 Node* n2 = in(i2); | |
| 473 _in[i1] = n2; | |
| 474 _in[i2] = n1; | |
| 475 // If this node is in the hash table, make sure it doesn't need a rehash. | |
| 476 assert(check_hash == NO_HASH || check_hash == hash(), "edge swap must preserve hash code"); | |
| 477 } | |
| 478 | |
| 479 // Iterators over input Nodes for a Node X are written as: | |
| 480 // for( i = 0; i < X.req(); i++ ) ... X[i] ... | |
| 481 // NOTE: Required edges can contain embedded NULL pointers. | |
| 482 | |
| 483 //----------------- Other Node Properties | |
| 484 | |
| 485 // Generate class id for some ideal nodes to avoid virtual query | |
| 486 // methods is_<Node>(). | |
| 487 // Class id is the set of bits corresponded to the node class and all its | |
| 488 // super classes so that queries for super classes are also valid. | |
| 489 // Subclasses of the same super class have different assigned bit | |
| 490 // (the third parameter in the macro DEFINE_CLASS_ID). | |
| 491 // Classes with deeper hierarchy are declared first. | |
| 492 // Classes with the same hierarchy depth are sorted by usage frequency. | |
| 493 // | |
| 494 // The query method masks the bits to cut off bits of subclasses | |
| 495 // and then compare the result with the class id | |
| 496 // (see the macro DEFINE_CLASS_QUERY below). | |
| 497 // | |
| 498 // Class_MachCall=30, ClassMask_MachCall=31 | |
| 499 // 12 8 4 0 | |
| 500 // 0 0 0 0 0 0 0 0 1 1 1 1 0 | |
| 501 // | | | | | |
| 502 // | | | Bit_Mach=2 | |
| 503 // | | Bit_MachReturn=4 | |
| 504 // | Bit_MachSafePoint=8 | |
| 505 // Bit_MachCall=16 | |
| 506 // | |
| 507 // Class_CountedLoop=56, ClassMask_CountedLoop=63 | |
| 508 // 12 8 4 0 | |
| 509 // 0 0 0 0 0 0 0 1 1 1 0 0 0 | |
| 510 // | | | | |
| 511 // | | Bit_Region=8 | |
| 512 // | Bit_Loop=16 | |
| 513 // Bit_CountedLoop=32 | |
| 514 | |
| 515 #define DEFINE_CLASS_ID(cl, supcl, subn) \ | |
| 516 Bit_##cl = (Class_##supcl == 0) ? 1 << subn : (Bit_##supcl) << (1 + subn) , \ | |
| 517 Class_##cl = Class_##supcl + Bit_##cl , \ | |
| 518 ClassMask_##cl = ((Bit_##cl << 1) - 1) , | |
| 519 | |
| 520 // This enum is used only for C2 ideal and mach nodes with is_<node>() methods | |
| 521 // so that it's values fits into 16 bits. | |
| 522 enum NodeClasses { | |
| 523 Bit_Node = 0x0000, | |
| 524 Class_Node = 0x0000, | |
| 525 ClassMask_Node = 0xFFFF, | |
| 526 | |
| 527 DEFINE_CLASS_ID(Multi, Node, 0) | |
| 528 DEFINE_CLASS_ID(SafePoint, Multi, 0) | |
| 529 DEFINE_CLASS_ID(Call, SafePoint, 0) | |
| 530 DEFINE_CLASS_ID(CallJava, Call, 0) | |
| 531 DEFINE_CLASS_ID(CallStaticJava, CallJava, 0) | |
| 532 DEFINE_CLASS_ID(CallDynamicJava, CallJava, 1) | |
| 533 DEFINE_CLASS_ID(CallRuntime, Call, 1) | |
| 534 DEFINE_CLASS_ID(CallLeaf, CallRuntime, 0) | |
| 535 DEFINE_CLASS_ID(Allocate, Call, 2) | |
| 536 DEFINE_CLASS_ID(AllocateArray, Allocate, 0) | |
| 537 DEFINE_CLASS_ID(AbstractLock, Call, 3) | |
| 538 DEFINE_CLASS_ID(Lock, AbstractLock, 0) | |
| 539 DEFINE_CLASS_ID(Unlock, AbstractLock, 1) | |
| 540 DEFINE_CLASS_ID(MultiBranch, Multi, 1) | |
| 541 DEFINE_CLASS_ID(PCTable, MultiBranch, 0) | |
| 542 DEFINE_CLASS_ID(Catch, PCTable, 0) | |
| 543 DEFINE_CLASS_ID(Jump, PCTable, 1) | |
| 544 DEFINE_CLASS_ID(If, MultiBranch, 1) | |
| 545 DEFINE_CLASS_ID(CountedLoopEnd, If, 0) | |
| 546 DEFINE_CLASS_ID(NeverBranch, MultiBranch, 2) | |
| 547 DEFINE_CLASS_ID(Start, Multi, 2) | |
| 548 DEFINE_CLASS_ID(MemBar, Multi, 3) | |
| 549 DEFINE_CLASS_ID(Initialize, MemBar, 0) | |
| 550 | |
| 551 DEFINE_CLASS_ID(Mach, Node, 1) | |
| 552 DEFINE_CLASS_ID(MachReturn, Mach, 0) | |
| 553 DEFINE_CLASS_ID(MachSafePoint, MachReturn, 0) | |
| 554 DEFINE_CLASS_ID(MachCall, MachSafePoint, 0) | |
| 555 DEFINE_CLASS_ID(MachCallJava, MachCall, 0) | |
| 556 DEFINE_CLASS_ID(MachCallStaticJava, MachCallJava, 0) | |
| 557 DEFINE_CLASS_ID(MachCallDynamicJava, MachCallJava, 1) | |
| 558 DEFINE_CLASS_ID(MachCallRuntime, MachCall, 1) | |
| 559 DEFINE_CLASS_ID(MachCallLeaf, MachCallRuntime, 0) | |
| 560 DEFINE_CLASS_ID(MachSpillCopy, Mach, 1) | |
| 561 DEFINE_CLASS_ID(MachNullCheck, Mach, 2) | |
| 562 DEFINE_CLASS_ID(MachIf, Mach, 3) | |
| 563 DEFINE_CLASS_ID(MachTemp, Mach, 4) | |
| 564 | |
| 565 DEFINE_CLASS_ID(Proj, Node, 2) | |
| 566 DEFINE_CLASS_ID(CatchProj, Proj, 0) | |
| 567 DEFINE_CLASS_ID(JumpProj, Proj, 1) | |
| 568 DEFINE_CLASS_ID(IfTrue, Proj, 2) | |
| 569 DEFINE_CLASS_ID(IfFalse, Proj, 3) | |
| 33 | 570 DEFINE_CLASS_ID(Parm, Proj, 4) |
| 0 | 571 |
| 572 DEFINE_CLASS_ID(Region, Node, 3) | |
| 573 DEFINE_CLASS_ID(Loop, Region, 0) | |
| 574 DEFINE_CLASS_ID(Root, Loop, 0) | |
| 575 DEFINE_CLASS_ID(CountedLoop, Loop, 1) | |
| 576 | |
| 577 DEFINE_CLASS_ID(Sub, Node, 4) | |
| 578 DEFINE_CLASS_ID(Cmp, Sub, 0) | |
| 579 DEFINE_CLASS_ID(FastLock, Cmp, 0) | |
| 580 DEFINE_CLASS_ID(FastUnlock, Cmp, 1) | |
| 581 | |
| 582 DEFINE_CLASS_ID(Type, Node, 5) | |
| 583 DEFINE_CLASS_ID(Phi, Type, 0) | |
| 584 DEFINE_CLASS_ID(ConstraintCast, Type, 1) | |
| 585 DEFINE_CLASS_ID(CheckCastPP, Type, 2) | |
| 586 DEFINE_CLASS_ID(CMove, Type, 3) | |
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587 DEFINE_CLASS_ID(SafePointScalarObject, Type, 4) |
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588 DEFINE_CLASS_ID(DecodeN, Type, 5) |
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589 DEFINE_CLASS_ID(EncodeP, Type, 6) |
| 0 | 590 |
| 591 DEFINE_CLASS_ID(Mem, Node, 6) | |
| 592 DEFINE_CLASS_ID(Load, Mem, 0) | |
| 593 DEFINE_CLASS_ID(Store, Mem, 1) | |
| 594 DEFINE_CLASS_ID(LoadStore, Mem, 2) | |
| 595 | |
| 596 DEFINE_CLASS_ID(MergeMem, Node, 7) | |
| 597 DEFINE_CLASS_ID(Bool, Node, 8) | |
| 598 DEFINE_CLASS_ID(AddP, Node, 9) | |
| 599 DEFINE_CLASS_ID(BoxLock, Node, 10) | |
| 600 DEFINE_CLASS_ID(Add, Node, 11) | |
| 601 DEFINE_CLASS_ID(Mul, Node, 12) | |
| 602 | |
| 603 _max_classes = ClassMask_Mul | |
| 604 }; | |
| 605 #undef DEFINE_CLASS_ID | |
| 606 | |
| 607 // Flags are sorted by usage frequency. | |
| 608 enum NodeFlags { | |
| 609 Flag_is_Copy = 0x01, // should be first bit to avoid shift | |
| 610 Flag_is_Call = Flag_is_Copy << 1, | |
| 611 Flag_rematerialize = Flag_is_Call << 1, | |
| 612 Flag_needs_anti_dependence_check = Flag_rematerialize << 1, | |
| 613 Flag_is_macro = Flag_needs_anti_dependence_check << 1, | |
| 614 Flag_is_Con = Flag_is_macro << 1, | |
| 615 Flag_is_cisc_alternate = Flag_is_Con << 1, | |
| 616 Flag_is_Branch = Flag_is_cisc_alternate << 1, | |
| 617 Flag_is_block_start = Flag_is_Branch << 1, | |
| 618 Flag_is_Goto = Flag_is_block_start << 1, | |
| 619 Flag_is_dead_loop_safe = Flag_is_Goto << 1, | |
| 620 Flag_may_be_short_branch = Flag_is_dead_loop_safe << 1, | |
| 621 Flag_is_safepoint_node = Flag_may_be_short_branch << 1, | |
| 622 Flag_is_pc_relative = Flag_is_safepoint_node << 1, | |
| 623 Flag_is_Vector = Flag_is_pc_relative << 1, | |
| 624 _max_flags = (Flag_is_Vector << 1) - 1 // allow flags combination | |
| 625 }; | |
| 626 | |
| 627 private: | |
| 628 jushort _class_id; | |
| 629 jushort _flags; | |
| 630 | |
| 631 protected: | |
| 632 // These methods should be called from constructors only. | |
| 633 void init_class_id(jushort c) { | |
| 634 assert(c <= _max_classes, "invalid node class"); | |
| 635 _class_id = c; // cast out const | |
| 636 } | |
| 637 void init_flags(jushort fl) { | |
| 638 assert(fl <= _max_flags, "invalid node flag"); | |
| 639 _flags |= fl; | |
| 640 } | |
| 641 void clear_flag(jushort fl) { | |
| 642 assert(fl <= _max_flags, "invalid node flag"); | |
| 643 _flags &= ~fl; | |
| 644 } | |
| 645 | |
| 646 public: | |
| 647 const jushort class_id() const { return _class_id; } | |
| 648 | |
| 649 const jushort flags() const { return _flags; } | |
| 650 | |
| 651 // Return a dense integer opcode number | |
| 652 virtual int Opcode() const; | |
| 653 | |
| 654 // Virtual inherited Node size | |
| 655 virtual uint size_of() const; | |
| 656 | |
| 657 // Other interesting Node properties | |
| 658 | |
| 659 // Special case: is_Call() returns true for both CallNode and MachCallNode. | |
| 660 bool is_Call() const { | |
| 661 return (_flags & Flag_is_Call) != 0; | |
| 662 } | |
| 663 | |
| 664 CallNode *as_Call() const { // Only for CallNode (not for MachCallNode) | |
| 665 assert((_class_id & ClassMask_Call) == Class_Call, "invalid node class"); | |
| 666 return (CallNode*)this; | |
| 667 } | |
| 668 | |
| 669 #define DEFINE_CLASS_QUERY(type) \ | |
| 670 bool is_##type() const { \ | |
| 671 return ((_class_id & ClassMask_##type) == Class_##type); \ | |
| 672 } \ | |
| 673 type##Node *as_##type() const { \ | |
| 674 assert(is_##type(), "invalid node class"); \ | |
| 675 return (type##Node*)this; \ | |
| 676 } | |
| 677 | |
| 678 DEFINE_CLASS_QUERY(AbstractLock) | |
| 679 DEFINE_CLASS_QUERY(Add) | |
| 680 DEFINE_CLASS_QUERY(AddP) | |
| 681 DEFINE_CLASS_QUERY(Allocate) | |
| 682 DEFINE_CLASS_QUERY(AllocateArray) | |
| 683 DEFINE_CLASS_QUERY(Bool) | |
| 684 DEFINE_CLASS_QUERY(BoxLock) | |
| 685 DEFINE_CLASS_QUERY(CallDynamicJava) | |
| 686 DEFINE_CLASS_QUERY(CallJava) | |
| 687 DEFINE_CLASS_QUERY(CallLeaf) | |
| 688 DEFINE_CLASS_QUERY(CallRuntime) | |
| 689 DEFINE_CLASS_QUERY(CallStaticJava) | |
| 690 DEFINE_CLASS_QUERY(Catch) | |
| 691 DEFINE_CLASS_QUERY(CatchProj) | |
| 692 DEFINE_CLASS_QUERY(CheckCastPP) | |
| 693 DEFINE_CLASS_QUERY(ConstraintCast) | |
| 694 DEFINE_CLASS_QUERY(CMove) | |
| 695 DEFINE_CLASS_QUERY(Cmp) | |
| 696 DEFINE_CLASS_QUERY(CountedLoop) | |
| 697 DEFINE_CLASS_QUERY(CountedLoopEnd) | |
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698 DEFINE_CLASS_QUERY(DecodeN) |
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699 DEFINE_CLASS_QUERY(EncodeP) |
| 0 | 700 DEFINE_CLASS_QUERY(FastLock) |
| 701 DEFINE_CLASS_QUERY(FastUnlock) | |
| 702 DEFINE_CLASS_QUERY(If) | |
| 703 DEFINE_CLASS_QUERY(IfFalse) | |
| 704 DEFINE_CLASS_QUERY(IfTrue) | |
| 705 DEFINE_CLASS_QUERY(Initialize) | |
| 706 DEFINE_CLASS_QUERY(Jump) | |
| 707 DEFINE_CLASS_QUERY(JumpProj) | |
| 708 DEFINE_CLASS_QUERY(Load) | |
| 709 DEFINE_CLASS_QUERY(LoadStore) | |
| 710 DEFINE_CLASS_QUERY(Lock) | |
| 711 DEFINE_CLASS_QUERY(Loop) | |
| 712 DEFINE_CLASS_QUERY(Mach) | |
| 713 DEFINE_CLASS_QUERY(MachCall) | |
| 714 DEFINE_CLASS_QUERY(MachCallDynamicJava) | |
| 715 DEFINE_CLASS_QUERY(MachCallJava) | |
| 716 DEFINE_CLASS_QUERY(MachCallLeaf) | |
| 717 DEFINE_CLASS_QUERY(MachCallRuntime) | |
| 718 DEFINE_CLASS_QUERY(MachCallStaticJava) | |
| 719 DEFINE_CLASS_QUERY(MachIf) | |
| 720 DEFINE_CLASS_QUERY(MachNullCheck) | |
| 721 DEFINE_CLASS_QUERY(MachReturn) | |
| 722 DEFINE_CLASS_QUERY(MachSafePoint) | |
| 723 DEFINE_CLASS_QUERY(MachSpillCopy) | |
| 724 DEFINE_CLASS_QUERY(MachTemp) | |
| 725 DEFINE_CLASS_QUERY(Mem) | |
| 726 DEFINE_CLASS_QUERY(MemBar) | |
| 727 DEFINE_CLASS_QUERY(MergeMem) | |
| 728 DEFINE_CLASS_QUERY(Mul) | |
| 729 DEFINE_CLASS_QUERY(Multi) | |
| 730 DEFINE_CLASS_QUERY(MultiBranch) | |
| 33 | 731 DEFINE_CLASS_QUERY(Parm) |
| 0 | 732 DEFINE_CLASS_QUERY(PCTable) |
| 733 DEFINE_CLASS_QUERY(Phi) | |
| 734 DEFINE_CLASS_QUERY(Proj) | |
| 735 DEFINE_CLASS_QUERY(Region) | |
| 736 DEFINE_CLASS_QUERY(Root) | |
| 737 DEFINE_CLASS_QUERY(SafePoint) | |
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738 DEFINE_CLASS_QUERY(SafePointScalarObject) |
| 0 | 739 DEFINE_CLASS_QUERY(Start) |
| 740 DEFINE_CLASS_QUERY(Store) | |
| 741 DEFINE_CLASS_QUERY(Sub) | |
| 742 DEFINE_CLASS_QUERY(Type) | |
| 743 DEFINE_CLASS_QUERY(Unlock) | |
| 744 | |
| 745 #undef DEFINE_CLASS_QUERY | |
| 746 | |
| 747 // duplicate of is_MachSpillCopy() | |
| 748 bool is_SpillCopy () const { | |
| 749 return ((_class_id & ClassMask_MachSpillCopy) == Class_MachSpillCopy); | |
| 750 } | |
| 751 | |
| 752 bool is_Con () const { return (_flags & Flag_is_Con) != 0; } | |
| 753 bool is_Goto() const { return (_flags & Flag_is_Goto) != 0; } | |
| 754 // The data node which is safe to leave in dead loop during IGVN optimization. | |
| 755 bool is_dead_loop_safe() const { | |
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756 return is_Phi() || (is_Proj() && in(0) == NULL) || |
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757 ((_flags & (Flag_is_dead_loop_safe | Flag_is_Con)) != 0 && |
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758 (!is_Proj() || !in(0)->is_Allocate())); |
| 0 | 759 } |
| 760 | |
| 761 // is_Copy() returns copied edge index (0 or 1) | |
| 762 uint is_Copy() const { return (_flags & Flag_is_Copy); } | |
| 763 | |
| 764 virtual bool is_CFG() const { return false; } | |
| 765 | |
| 766 // If this node is control-dependent on a test, can it be | |
| 767 // rerouted to a dominating equivalent test? This is usually | |
| 768 // true of non-CFG nodes, but can be false for operations which | |
| 769 // depend for their correct sequencing on more than one test. | |
| 770 // (In that case, hoisting to a dominating test may silently | |
| 771 // skip some other important test.) | |
| 772 virtual bool depends_only_on_test() const { assert(!is_CFG(), ""); return true; }; | |
| 773 | |
| 774 // defined for MachNodes that match 'If' | 'Goto' | 'CountedLoopEnd' | |
| 775 bool is_Branch() const { return (_flags & Flag_is_Branch) != 0; } | |
| 776 | |
| 777 // When building basic blocks, I need to have a notion of block beginning | |
| 778 // Nodes, next block selector Nodes (block enders), and next block | |
| 779 // projections. These calls need to work on their machine equivalents. The | |
| 780 // Ideal beginning Nodes are RootNode, RegionNode and StartNode. | |
| 781 bool is_block_start() const { | |
| 782 if ( is_Region() ) | |
| 783 return this == (const Node*)in(0); | |
| 784 else | |
| 785 return (_flags & Flag_is_block_start) != 0; | |
| 786 } | |
| 787 | |
| 788 // The Ideal control projection Nodes are IfTrue/IfFalse, JumpProjNode, Root, | |
| 789 // Goto and Return. This call also returns the block ending Node. | |
| 790 virtual const Node *is_block_proj() const; | |
| 791 | |
| 792 // The node is a "macro" node which needs to be expanded before matching | |
| 793 bool is_macro() const { return (_flags & Flag_is_macro) != 0; } | |
| 794 | |
| 795 // Value is a vector of primitive values | |
| 796 bool is_Vector() const { return (_flags & Flag_is_Vector) != 0; } | |
| 797 | |
| 798 //----------------- Optimization | |
| 799 | |
| 800 // Get the worst-case Type output for this Node. | |
| 801 virtual const class Type *bottom_type() const; | |
| 802 | |
| 803 // If we find a better type for a node, try to record it permanently. | |
| 804 // Return true if this node actually changed. | |
| 805 // Be sure to do the hash_delete game in the "rehash" variant. | |
| 806 void raise_bottom_type(const Type* new_type); | |
| 807 | |
| 808 // Get the address type with which this node uses and/or defs memory, | |
| 809 // or NULL if none. The address type is conservatively wide. | |
| 810 // Returns non-null for calls, membars, loads, stores, etc. | |
| 811 // Returns TypePtr::BOTTOM if the node touches memory "broadly". | |
| 812 virtual const class TypePtr *adr_type() const { return NULL; } | |
| 813 | |
| 814 // Return an existing node which computes the same function as this node. | |
| 815 // The optimistic combined algorithm requires this to return a Node which | |
| 816 // is a small number of steps away (e.g., one of my inputs). | |
| 817 virtual Node *Identity( PhaseTransform *phase ); | |
| 818 | |
| 819 // Return the set of values this Node can take on at runtime. | |
| 820 virtual const Type *Value( PhaseTransform *phase ) const; | |
| 821 | |
| 822 // Return a node which is more "ideal" than the current node. | |
| 823 // The invariants on this call are subtle. If in doubt, read the | |
| 824 // treatise in node.cpp above the default implemention AND TEST WITH | |
| 825 // +VerifyIterativeGVN! | |
| 826 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); | |
| 827 | |
| 828 // Some nodes have specific Ideal subgraph transformations only if they are | |
| 829 // unique users of specific nodes. Such nodes should be put on IGVN worklist | |
| 830 // for the transformations to happen. | |
| 831 bool has_special_unique_user() const; | |
| 832 | |
|
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833 // Skip Proj and CatchProj nodes chains. Check for Null and Top. |
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834 Node* find_exact_control(Node* ctrl); |
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835 |
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836 // Check if 'this' node dominates or equal to 'sub'. |
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837 bool dominates(Node* sub, Node_List &nlist); |
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838 |
| 0 | 839 protected: |
| 840 bool remove_dead_region(PhaseGVN *phase, bool can_reshape); | |
| 841 public: | |
| 842 | |
| 843 // Idealize graph, using DU info. Done after constant propagation | |
| 844 virtual Node *Ideal_DU_postCCP( PhaseCCP *ccp ); | |
| 845 | |
| 846 // See if there is valid pipeline info | |
| 847 static const Pipeline *pipeline_class(); | |
| 848 virtual const Pipeline *pipeline() const; | |
| 849 | |
| 850 // Compute the latency from the def to this instruction of the ith input node | |
| 851 uint latency(uint i); | |
| 852 | |
| 853 // Hash & compare functions, for pessimistic value numbering | |
| 854 | |
| 855 // If the hash function returns the special sentinel value NO_HASH, | |
| 856 // the node is guaranteed never to compare equal to any other node. | |
| 857 // If we accidently generate a hash with value NO_HASH the node | |
| 858 // won't go into the table and we'll lose a little optimization. | |
| 859 enum { NO_HASH = 0 }; | |
| 860 virtual uint hash() const; | |
| 861 virtual uint cmp( const Node &n ) const; | |
| 862 | |
| 863 // Operation appears to be iteratively computed (such as an induction variable) | |
| 864 // It is possible for this operation to return false for a loop-varying | |
| 865 // value, if it appears (by local graph inspection) to be computed by a simple conditional. | |
| 866 bool is_iteratively_computed(); | |
| 867 | |
| 868 // Determine if a node is Counted loop induction variable. | |
| 869 // The method is defined in loopnode.cpp. | |
| 870 const Node* is_loop_iv() const; | |
| 871 | |
| 872 // Return a node with opcode "opc" and same inputs as "this" if one can | |
| 873 // be found; Otherwise return NULL; | |
| 874 Node* find_similar(int opc); | |
| 875 | |
| 876 // Return the unique control out if only one. Null if none or more than one. | |
| 877 Node* unique_ctrl_out(); | |
| 878 | |
| 879 //----------------- Code Generation | |
| 880 | |
| 881 // Ideal register class for Matching. Zero means unmatched instruction | |
| 882 // (these are cloned instead of converted to machine nodes). | |
| 883 virtual uint ideal_reg() const; | |
| 884 | |
| 885 static const uint NotAMachineReg; // must be > max. machine register | |
| 886 | |
| 887 // Do we Match on this edge index or not? Generally false for Control | |
| 888 // and true for everything else. Weird for calls & returns. | |
| 889 virtual uint match_edge(uint idx) const; | |
| 890 | |
| 891 // Register class output is returned in | |
| 892 virtual const RegMask &out_RegMask() const; | |
| 893 // Register class input is expected in | |
| 894 virtual const RegMask &in_RegMask(uint) const; | |
| 895 // Should we clone rather than spill this instruction? | |
| 896 bool rematerialize() const; | |
| 897 | |
| 898 // Return JVM State Object if this Node carries debug info, or NULL otherwise | |
| 899 virtual JVMState* jvms() const; | |
| 900 | |
| 901 // Print as assembly | |
| 902 virtual void format( PhaseRegAlloc *, outputStream* st = tty ) const; | |
| 903 // Emit bytes starting at parameter 'ptr' | |
| 904 // Bump 'ptr' by the number of output bytes | |
| 905 virtual void emit(CodeBuffer &cbuf, PhaseRegAlloc *ra_) const; | |
| 906 // Size of instruction in bytes | |
| 907 virtual uint size(PhaseRegAlloc *ra_) const; | |
| 908 | |
| 909 // Convenience function to extract an integer constant from a node. | |
| 910 // If it is not an integer constant (either Con, CastII, or Mach), | |
| 911 // return value_if_unknown. | |
| 912 jint find_int_con(jint value_if_unknown) const { | |
| 913 const TypeInt* t = find_int_type(); | |
| 914 return (t != NULL && t->is_con()) ? t->get_con() : value_if_unknown; | |
| 915 } | |
| 916 // Return the constant, knowing it is an integer constant already | |
| 917 jint get_int() const { | |
| 918 const TypeInt* t = find_int_type(); | |
| 919 guarantee(t != NULL, "must be con"); | |
| 920 return t->get_con(); | |
| 921 } | |
| 922 // Here's where the work is done. Can produce non-constant int types too. | |
| 923 const TypeInt* find_int_type() const; | |
| 924 | |
| 925 // Same thing for long (and intptr_t, via type.hpp): | |
| 926 jlong get_long() const { | |
| 927 const TypeLong* t = find_long_type(); | |
| 928 guarantee(t != NULL, "must be con"); | |
| 929 return t->get_con(); | |
| 930 } | |
| 931 jlong find_long_con(jint value_if_unknown) const { | |
| 932 const TypeLong* t = find_long_type(); | |
| 933 return (t != NULL && t->is_con()) ? t->get_con() : value_if_unknown; | |
| 934 } | |
| 935 const TypeLong* find_long_type() const; | |
| 936 | |
| 937 // These guys are called by code generated by ADLC: | |
| 938 intptr_t get_ptr() const; | |
|
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939 intptr_t get_narrowcon() const; |
| 0 | 940 jdouble getd() const; |
| 941 jfloat getf() const; | |
| 942 | |
| 943 // Nodes which are pinned into basic blocks | |
| 944 virtual bool pinned() const { return false; } | |
| 945 | |
| 946 // Nodes which use memory without consuming it, hence need antidependences | |
| 947 // More specifically, needs_anti_dependence_check returns true iff the node | |
| 948 // (a) does a load, and (b) does not perform a store (except perhaps to a | |
| 949 // stack slot or some other unaliased location). | |
| 950 bool needs_anti_dependence_check() const; | |
| 951 | |
| 952 // Return which operand this instruction may cisc-spill. In other words, | |
| 953 // return operand position that can convert from reg to memory access | |
| 954 virtual int cisc_operand() const { return AdlcVMDeps::Not_cisc_spillable; } | |
| 955 bool is_cisc_alternate() const { return (_flags & Flag_is_cisc_alternate) != 0; } | |
| 956 | |
| 957 //----------------- Graph walking | |
| 958 public: | |
| 959 // Walk and apply member functions recursively. | |
| 960 // Supplied (this) pointer is root. | |
| 961 void walk(NFunc pre, NFunc post, void *env); | |
| 962 static void nop(Node &, void*); // Dummy empty function | |
| 963 static void packregion( Node &n, void* ); | |
| 964 private: | |
| 965 void walk_(NFunc pre, NFunc post, void *env, VectorSet &visited); | |
| 966 | |
| 967 //----------------- Printing, etc | |
| 968 public: | |
| 969 #ifndef PRODUCT | |
| 970 Node* find(int idx) const; // Search the graph for the given idx. | |
| 971 Node* find_ctrl(int idx) const; // Search control ancestors for the given idx. | |
| 972 void dump() const; // Print this node, | |
| 973 void dump(int depth) const; // Print this node, recursively to depth d | |
| 974 void dump_ctrl(int depth) const; // Print control nodes, to depth d | |
| 975 virtual void dump_req() const; // Print required-edge info | |
| 976 virtual void dump_prec() const; // Print precedence-edge info | |
| 977 virtual void dump_out() const; // Print the output edge info | |
| 978 virtual void dump_spec(outputStream *st) const {}; // Print per-node info | |
| 979 void verify_edges(Unique_Node_List &visited); // Verify bi-directional edges | |
| 980 void verify() const; // Check Def-Use info for my subgraph | |
| 981 static void verify_recur(const Node *n, int verify_depth, VectorSet &old_space, VectorSet &new_space); | |
| 982 | |
| 983 // This call defines a class-unique string used to identify class instances | |
| 984 virtual const char *Name() const; | |
| 985 | |
| 986 void dump_format(PhaseRegAlloc *ra) const; // debug access to MachNode::format(...) | |
| 987 // RegMask Print Functions | |
| 988 void dump_in_regmask(int idx) { in_RegMask(idx).dump(); } | |
| 989 void dump_out_regmask() { out_RegMask().dump(); } | |
| 990 static int _in_dump_cnt; | |
| 991 static bool in_dump() { return _in_dump_cnt > 0; } | |
| 992 void fast_dump() const { | |
| 993 tty->print("%4d: %-17s", _idx, Name()); | |
| 994 for (uint i = 0; i < len(); i++) | |
| 995 if (in(i)) | |
| 996 tty->print(" %4d", in(i)->_idx); | |
| 997 else | |
| 998 tty->print(" NULL"); | |
| 999 tty->print("\n"); | |
| 1000 } | |
| 1001 #endif | |
| 1002 #ifdef ASSERT | |
| 1003 void verify_construction(); | |
| 1004 bool verify_jvms(const JVMState* jvms) const; | |
| 1005 int _debug_idx; // Unique value assigned to every node. | |
| 1006 int debug_idx() const { return _debug_idx; } | |
| 1007 void set_debug_idx( int debug_idx ) { _debug_idx = debug_idx; } | |
| 1008 | |
| 1009 Node* _debug_orig; // Original version of this, if any. | |
| 1010 Node* debug_orig() const { return _debug_orig; } | |
| 1011 void set_debug_orig(Node* orig); // _debug_orig = orig | |
| 1012 | |
| 1013 int _hash_lock; // Barrier to modifications of nodes in the hash table | |
| 1014 void enter_hash_lock() { ++_hash_lock; assert(_hash_lock < 99, "in too many hash tables?"); } | |
| 1015 void exit_hash_lock() { --_hash_lock; assert(_hash_lock >= 0, "mispaired hash locks"); } | |
| 1016 | |
| 1017 static void init_NodeProperty(); | |
| 1018 | |
| 1019 #if OPTO_DU_ITERATOR_ASSERT | |
| 1020 const Node* _last_del; // The last deleted node. | |
| 1021 uint _del_tick; // Bumped when a deletion happens.. | |
| 1022 #endif | |
| 1023 #endif | |
| 1024 }; | |
| 1025 | |
| 1026 //----------------------------------------------------------------------------- | |
| 1027 // Iterators over DU info, and associated Node functions. | |
| 1028 | |
| 1029 #if OPTO_DU_ITERATOR_ASSERT | |
| 1030 | |
| 1031 // Common code for assertion checking on DU iterators. | |
| 1032 class DUIterator_Common VALUE_OBJ_CLASS_SPEC { | |
| 1033 #ifdef ASSERT | |
| 1034 protected: | |
| 1035 bool _vdui; // cached value of VerifyDUIterators | |
| 1036 const Node* _node; // the node containing the _out array | |
| 1037 uint _outcnt; // cached node->_outcnt | |
| 1038 uint _del_tick; // cached node->_del_tick | |
| 1039 Node* _last; // last value produced by the iterator | |
| 1040 | |
| 1041 void sample(const Node* node); // used by c'tor to set up for verifies | |
| 1042 void verify(const Node* node, bool at_end_ok = false); | |
| 1043 void verify_resync(); | |
| 1044 void reset(const DUIterator_Common& that); | |
| 1045 | |
| 1046 // The VDUI_ONLY macro protects code conditionalized on VerifyDUIterators | |
| 1047 #define I_VDUI_ONLY(i,x) { if ((i)._vdui) { x; } } | |
| 1048 #else | |
| 1049 #define I_VDUI_ONLY(i,x) { } | |
| 1050 #endif //ASSERT | |
| 1051 }; | |
| 1052 | |
| 1053 #define VDUI_ONLY(x) I_VDUI_ONLY(*this, x) | |
| 1054 | |
| 1055 // Default DU iterator. Allows appends onto the out array. | |
| 1056 // Allows deletion from the out array only at the current point. | |
| 1057 // Usage: | |
| 1058 // for (DUIterator i = x->outs(); x->has_out(i); i++) { | |
| 1059 // Node* y = x->out(i); | |
| 1060 // ... | |
| 1061 // } | |
| 1062 // Compiles in product mode to a unsigned integer index, which indexes | |
| 1063 // onto a repeatedly reloaded base pointer of x->_out. The loop predicate | |
| 1064 // also reloads x->_outcnt. If you delete, you must perform "--i" just | |
| 1065 // before continuing the loop. You must delete only the last-produced | |
| 1066 // edge. You must delete only a single copy of the last-produced edge, | |
| 1067 // or else you must delete all copies at once (the first time the edge | |
| 1068 // is produced by the iterator). | |
| 1069 class DUIterator : public DUIterator_Common { | |
| 1070 friend class Node; | |
| 1071 | |
| 1072 // This is the index which provides the product-mode behavior. | |
| 1073 // Whatever the product-mode version of the system does to the | |
| 1074 // DUI index is done to this index. All other fields in | |
| 1075 // this class are used only for assertion checking. | |
| 1076 uint _idx; | |
| 1077 | |
| 1078 #ifdef ASSERT | |
| 1079 uint _refresh_tick; // Records the refresh activity. | |
| 1080 | |
| 1081 void sample(const Node* node); // Initialize _refresh_tick etc. | |
| 1082 void verify(const Node* node, bool at_end_ok = false); | |
| 1083 void verify_increment(); // Verify an increment operation. | |
| 1084 void verify_resync(); // Verify that we can back up over a deletion. | |
| 1085 void verify_finish(); // Verify that the loop terminated properly. | |
| 1086 void refresh(); // Resample verification info. | |
| 1087 void reset(const DUIterator& that); // Resample after assignment. | |
| 1088 #endif | |
| 1089 | |
| 1090 DUIterator(const Node* node, int dummy_to_avoid_conversion) | |
| 1091 { _idx = 0; debug_only(sample(node)); } | |
| 1092 | |
| 1093 public: | |
| 1094 // initialize to garbage; clear _vdui to disable asserts | |
| 1095 DUIterator() | |
| 1096 { /*initialize to garbage*/ debug_only(_vdui = false); } | |
| 1097 | |
| 1098 void operator++(int dummy_to_specify_postfix_op) | |
| 1099 { _idx++; VDUI_ONLY(verify_increment()); } | |
| 1100 | |
| 1101 void operator--() | |
| 1102 { VDUI_ONLY(verify_resync()); --_idx; } | |
| 1103 | |
| 1104 ~DUIterator() | |
| 1105 { VDUI_ONLY(verify_finish()); } | |
| 1106 | |
| 1107 void operator=(const DUIterator& that) | |
| 1108 { _idx = that._idx; debug_only(reset(that)); } | |
| 1109 }; | |
| 1110 | |
| 1111 DUIterator Node::outs() const | |
| 1112 { return DUIterator(this, 0); } | |
| 1113 DUIterator& Node::refresh_out_pos(DUIterator& i) const | |
| 1114 { I_VDUI_ONLY(i, i.refresh()); return i; } | |
| 1115 bool Node::has_out(DUIterator& i) const | |
| 1116 { I_VDUI_ONLY(i, i.verify(this,true));return i._idx < _outcnt; } | |
| 1117 Node* Node::out(DUIterator& i) const | |
| 1118 { I_VDUI_ONLY(i, i.verify(this)); return debug_only(i._last=) _out[i._idx]; } | |
| 1119 | |
| 1120 | |
| 1121 // Faster DU iterator. Disallows insertions into the out array. | |
| 1122 // Allows deletion from the out array only at the current point. | |
| 1123 // Usage: | |
| 1124 // for (DUIterator_Fast imax, i = x->fast_outs(imax); i < imax; i++) { | |
| 1125 // Node* y = x->fast_out(i); | |
| 1126 // ... | |
| 1127 // } | |
| 1128 // Compiles in product mode to raw Node** pointer arithmetic, with | |
| 1129 // no reloading of pointers from the original node x. If you delete, | |
| 1130 // you must perform "--i; --imax" just before continuing the loop. | |
| 1131 // If you delete multiple copies of the same edge, you must decrement | |
| 1132 // imax, but not i, multiple times: "--i, imax -= num_edges". | |
| 1133 class DUIterator_Fast : public DUIterator_Common { | |
| 1134 friend class Node; | |
| 1135 friend class DUIterator_Last; | |
| 1136 | |
| 1137 // This is the pointer which provides the product-mode behavior. | |
| 1138 // Whatever the product-mode version of the system does to the | |
| 1139 // DUI pointer is done to this pointer. All other fields in | |
| 1140 // this class are used only for assertion checking. | |
| 1141 Node** _outp; | |
| 1142 | |
| 1143 #ifdef ASSERT | |
| 1144 void verify(const Node* node, bool at_end_ok = false); | |
| 1145 void verify_limit(); | |
| 1146 void verify_resync(); | |
| 1147 void verify_relimit(uint n); | |
| 1148 void reset(const DUIterator_Fast& that); | |
| 1149 #endif | |
| 1150 | |
| 1151 // Note: offset must be signed, since -1 is sometimes passed | |
| 1152 DUIterator_Fast(const Node* node, ptrdiff_t offset) | |
| 1153 { _outp = node->_out + offset; debug_only(sample(node)); } | |
| 1154 | |
| 1155 public: | |
| 1156 // initialize to garbage; clear _vdui to disable asserts | |
| 1157 DUIterator_Fast() | |
| 1158 { /*initialize to garbage*/ debug_only(_vdui = false); } | |
| 1159 | |
| 1160 void operator++(int dummy_to_specify_postfix_op) | |
| 1161 { _outp++; VDUI_ONLY(verify(_node, true)); } | |
| 1162 | |
| 1163 void operator--() | |
| 1164 { VDUI_ONLY(verify_resync()); --_outp; } | |
| 1165 | |
| 1166 void operator-=(uint n) // applied to the limit only | |
| 1167 { _outp -= n; VDUI_ONLY(verify_relimit(n)); } | |
| 1168 | |
| 1169 bool operator<(DUIterator_Fast& limit) { | |
| 1170 I_VDUI_ONLY(*this, this->verify(_node, true)); | |
| 1171 I_VDUI_ONLY(limit, limit.verify_limit()); | |
| 1172 return _outp < limit._outp; | |
| 1173 } | |
| 1174 | |
| 1175 void operator=(const DUIterator_Fast& that) | |
| 1176 { _outp = that._outp; debug_only(reset(that)); } | |
| 1177 }; | |
| 1178 | |
| 1179 DUIterator_Fast Node::fast_outs(DUIterator_Fast& imax) const { | |
| 1180 // Assign a limit pointer to the reference argument: | |
| 1181 imax = DUIterator_Fast(this, (ptrdiff_t)_outcnt); | |
| 1182 // Return the base pointer: | |
| 1183 return DUIterator_Fast(this, 0); | |
| 1184 } | |
| 1185 Node* Node::fast_out(DUIterator_Fast& i) const { | |
| 1186 I_VDUI_ONLY(i, i.verify(this)); | |
| 1187 return debug_only(i._last=) *i._outp; | |
| 1188 } | |
| 1189 | |
| 1190 | |
| 1191 // Faster DU iterator. Requires each successive edge to be removed. | |
| 1192 // Does not allow insertion of any edges. | |
| 1193 // Usage: | |
| 1194 // for (DUIterator_Last imin, i = x->last_outs(imin); i >= imin; i -= num_edges) { | |
| 1195 // Node* y = x->last_out(i); | |
| 1196 // ... | |
| 1197 // } | |
| 1198 // Compiles in product mode to raw Node** pointer arithmetic, with | |
| 1199 // no reloading of pointers from the original node x. | |
| 1200 class DUIterator_Last : private DUIterator_Fast { | |
| 1201 friend class Node; | |
| 1202 | |
| 1203 #ifdef ASSERT | |
| 1204 void verify(const Node* node, bool at_end_ok = false); | |
| 1205 void verify_limit(); | |
| 1206 void verify_step(uint num_edges); | |
| 1207 #endif | |
| 1208 | |
| 1209 // Note: offset must be signed, since -1 is sometimes passed | |
| 1210 DUIterator_Last(const Node* node, ptrdiff_t offset) | |
| 1211 : DUIterator_Fast(node, offset) { } | |
| 1212 | |
| 1213 void operator++(int dummy_to_specify_postfix_op) {} // do not use | |
| 1214 void operator<(int) {} // do not use | |
| 1215 | |
| 1216 public: | |
| 1217 DUIterator_Last() { } | |
| 1218 // initialize to garbage | |
| 1219 | |
| 1220 void operator--() | |
| 1221 { _outp--; VDUI_ONLY(verify_step(1)); } | |
| 1222 | |
| 1223 void operator-=(uint n) | |
| 1224 { _outp -= n; VDUI_ONLY(verify_step(n)); } | |
| 1225 | |
| 1226 bool operator>=(DUIterator_Last& limit) { | |
| 1227 I_VDUI_ONLY(*this, this->verify(_node, true)); | |
| 1228 I_VDUI_ONLY(limit, limit.verify_limit()); | |
| 1229 return _outp >= limit._outp; | |
| 1230 } | |
| 1231 | |
| 1232 void operator=(const DUIterator_Last& that) | |
| 1233 { DUIterator_Fast::operator=(that); } | |
| 1234 }; | |
| 1235 | |
| 1236 DUIterator_Last Node::last_outs(DUIterator_Last& imin) const { | |
| 1237 // Assign a limit pointer to the reference argument: | |
| 1238 imin = DUIterator_Last(this, 0); | |
| 1239 // Return the initial pointer: | |
| 1240 return DUIterator_Last(this, (ptrdiff_t)_outcnt - 1); | |
| 1241 } | |
| 1242 Node* Node::last_out(DUIterator_Last& i) const { | |
| 1243 I_VDUI_ONLY(i, i.verify(this)); | |
| 1244 return debug_only(i._last=) *i._outp; | |
| 1245 } | |
| 1246 | |
| 1247 #endif //OPTO_DU_ITERATOR_ASSERT | |
| 1248 | |
| 1249 #undef I_VDUI_ONLY | |
| 1250 #undef VDUI_ONLY | |
| 1251 | |
| 1252 | |
| 1253 //----------------------------------------------------------------------------- | |
| 1254 // Map dense integer indices to Nodes. Uses classic doubling-array trick. | |
| 1255 // Abstractly provides an infinite array of Node*'s, initialized to NULL. | |
| 1256 // Note that the constructor just zeros things, and since I use Arena | |
| 1257 // allocation I do not need a destructor to reclaim storage. | |
| 1258 class Node_Array : public ResourceObj { | |
| 1259 protected: | |
| 1260 Arena *_a; // Arena to allocate in | |
| 1261 uint _max; | |
| 1262 Node **_nodes; | |
| 1263 void grow( uint i ); // Grow array node to fit | |
| 1264 public: | |
| 1265 Node_Array(Arena *a) : _a(a), _max(OptoNodeListSize) { | |
| 1266 _nodes = NEW_ARENA_ARRAY( a, Node *, OptoNodeListSize ); | |
| 1267 for( int i = 0; i < OptoNodeListSize; i++ ) { | |
| 1268 _nodes[i] = NULL; | |
| 1269 } | |
| 1270 } | |
| 1271 | |
| 1272 Node_Array(Node_Array *na) : _a(na->_a), _max(na->_max), _nodes(na->_nodes) {} | |
| 1273 Node *operator[] ( uint i ) const // Lookup, or NULL for not mapped | |
| 1274 { return (i<_max) ? _nodes[i] : (Node*)NULL; } | |
| 1275 Node *at( uint i ) const { assert(i<_max,"oob"); return _nodes[i]; } | |
| 1276 Node **adr() { return _nodes; } | |
| 1277 // Extend the mapping: index i maps to Node *n. | |
| 1278 void map( uint i, Node *n ) { if( i>=_max ) grow(i); _nodes[i] = n; } | |
| 1279 void insert( uint i, Node *n ); | |
| 1280 void remove( uint i ); // Remove, preserving order | |
| 1281 void sort( C_sort_func_t func); | |
| 1282 void reset( Arena *new_a ); // Zap mapping to empty; reclaim storage | |
| 1283 void clear(); // Set all entries to NULL, keep storage | |
| 1284 uint Size() const { return _max; } | |
| 1285 void dump() const; | |
| 1286 }; | |
| 1287 | |
| 1288 class Node_List : public Node_Array { | |
| 1289 uint _cnt; | |
| 1290 public: | |
| 1291 Node_List() : Node_Array(Thread::current()->resource_area()), _cnt(0) {} | |
| 1292 Node_List(Arena *a) : Node_Array(a), _cnt(0) {} | |
| 1293 void insert( uint i, Node *n ) { Node_Array::insert(i,n); _cnt++; } | |
| 1294 void remove( uint i ) { Node_Array::remove(i); _cnt--; } | |
| 1295 void push( Node *b ) { map(_cnt++,b); } | |
| 1296 void yank( Node *n ); // Find and remove | |
| 1297 Node *pop() { return _nodes[--_cnt]; } | |
| 1298 Node *rpop() { Node *b = _nodes[0]; _nodes[0]=_nodes[--_cnt]; return b;} | |
| 1299 void clear() { _cnt = 0; Node_Array::clear(); } // retain storage | |
| 1300 uint size() const { return _cnt; } | |
| 1301 void dump() const; | |
| 1302 }; | |
| 1303 | |
| 1304 //------------------------------Unique_Node_List------------------------------- | |
| 1305 class Unique_Node_List : public Node_List { | |
| 1306 VectorSet _in_worklist; | |
| 1307 uint _clock_index; // Index in list where to pop from next | |
| 1308 public: | |
| 1309 Unique_Node_List() : Node_List(), _in_worklist(Thread::current()->resource_area()), _clock_index(0) {} | |
| 1310 Unique_Node_List(Arena *a) : Node_List(a), _in_worklist(a), _clock_index(0) {} | |
| 1311 | |
| 1312 void remove( Node *n ); | |
| 1313 bool member( Node *n ) { return _in_worklist.test(n->_idx) != 0; } | |
| 1314 VectorSet &member_set(){ return _in_worklist; } | |
| 1315 | |
| 1316 void push( Node *b ) { | |
| 1317 if( !_in_worklist.test_set(b->_idx) ) | |
| 1318 Node_List::push(b); | |
| 1319 } | |
| 1320 Node *pop() { | |
| 1321 if( _clock_index >= size() ) _clock_index = 0; | |
| 1322 Node *b = at(_clock_index); | |
| 1323 map( _clock_index++, Node_List::pop()); | |
| 1324 _in_worklist >>= b->_idx; | |
| 1325 return b; | |
| 1326 } | |
| 1327 Node *remove( uint i ) { | |
| 1328 Node *b = Node_List::at(i); | |
| 1329 _in_worklist >>= b->_idx; | |
| 1330 map(i,Node_List::pop()); | |
| 1331 return b; | |
| 1332 } | |
| 1333 void yank( Node *n ) { _in_worklist >>= n->_idx; Node_List::yank(n); } | |
| 1334 void clear() { | |
| 1335 _in_worklist.Clear(); // Discards storage but grows automatically | |
| 1336 Node_List::clear(); | |
| 1337 _clock_index = 0; | |
| 1338 } | |
| 1339 | |
| 1340 // Used after parsing to remove useless nodes before Iterative GVN | |
| 1341 void remove_useless_nodes(VectorSet &useful); | |
| 1342 | |
| 1343 #ifndef PRODUCT | |
| 1344 void print_set() const { _in_worklist.print(); } | |
| 1345 #endif | |
| 1346 }; | |
| 1347 | |
| 1348 // Inline definition of Compile::record_for_igvn must be deferred to this point. | |
| 1349 inline void Compile::record_for_igvn(Node* n) { | |
| 1350 _for_igvn->push(n); | |
| 1351 } | |
| 1352 | |
| 1353 //------------------------------Node_Stack------------------------------------- | |
| 1354 class Node_Stack { | |
| 1355 protected: | |
| 1356 struct INode { | |
| 1357 Node *node; // Processed node | |
| 1358 uint indx; // Index of next node's child | |
| 1359 }; | |
| 1360 INode *_inode_top; // tos, stack grows up | |
| 1361 INode *_inode_max; // End of _inodes == _inodes + _max | |
| 1362 INode *_inodes; // Array storage for the stack | |
| 1363 Arena *_a; // Arena to allocate in | |
| 1364 void grow(); | |
| 1365 public: | |
| 1366 Node_Stack(int size) { | |
| 1367 size_t max = (size > OptoNodeListSize) ? size : OptoNodeListSize; | |
| 1368 _a = Thread::current()->resource_area(); | |
| 1369 _inodes = NEW_ARENA_ARRAY( _a, INode, max ); | |
| 1370 _inode_max = _inodes + max; | |
| 1371 _inode_top = _inodes - 1; // stack is empty | |
| 1372 } | |
| 1373 | |
| 1374 Node_Stack(Arena *a, int size) : _a(a) { | |
| 1375 size_t max = (size > OptoNodeListSize) ? size : OptoNodeListSize; | |
| 1376 _inodes = NEW_ARENA_ARRAY( _a, INode, max ); | |
| 1377 _inode_max = _inodes + max; | |
| 1378 _inode_top = _inodes - 1; // stack is empty | |
| 1379 } | |
| 1380 | |
| 1381 void pop() { | |
| 1382 assert(_inode_top >= _inodes, "node stack underflow"); | |
| 1383 --_inode_top; | |
| 1384 } | |
| 1385 void push(Node *n, uint i) { | |
| 1386 ++_inode_top; | |
| 1387 if (_inode_top >= _inode_max) grow(); | |
| 1388 INode *top = _inode_top; // optimization | |
| 1389 top->node = n; | |
| 1390 top->indx = i; | |
| 1391 } | |
| 1392 Node *node() const { | |
| 1393 return _inode_top->node; | |
| 1394 } | |
| 1395 Node* node_at(uint i) const { | |
| 1396 assert(_inodes + i <= _inode_top, "in range"); | |
| 1397 return _inodes[i].node; | |
| 1398 } | |
| 1399 uint index() const { | |
| 1400 return _inode_top->indx; | |
| 1401 } | |
| 1402 void set_node(Node *n) { | |
| 1403 _inode_top->node = n; | |
| 1404 } | |
| 1405 void set_index(uint i) { | |
| 1406 _inode_top->indx = i; | |
| 1407 } | |
| 1408 uint size_max() const { return (uint)pointer_delta(_inode_max, _inodes, sizeof(INode)); } // Max size | |
| 40 | 1409 uint size() const { return (uint)pointer_delta((_inode_top+1), _inodes, sizeof(INode)); } // Current size |
| 0 | 1410 bool is_nonempty() const { return (_inode_top >= _inodes); } |
| 1411 bool is_empty() const { return (_inode_top < _inodes); } | |
| 1412 void clear() { _inode_top = _inodes - 1; } // retain storage | |
| 1413 }; | |
| 1414 | |
| 1415 | |
| 1416 //-----------------------------Node_Notes-------------------------------------- | |
| 1417 // Debugging or profiling annotations loosely and sparsely associated | |
| 1418 // with some nodes. See Compile::node_notes_at for the accessor. | |
| 1419 class Node_Notes VALUE_OBJ_CLASS_SPEC { | |
| 1420 JVMState* _jvms; | |
| 1421 | |
| 1422 public: | |
| 1423 Node_Notes(JVMState* jvms = NULL) { | |
| 1424 _jvms = jvms; | |
| 1425 } | |
| 1426 | |
| 1427 JVMState* jvms() { return _jvms; } | |
| 1428 void set_jvms(JVMState* x) { _jvms = x; } | |
| 1429 | |
| 1430 // True if there is nothing here. | |
| 1431 bool is_clear() { | |
| 1432 return (_jvms == NULL); | |
| 1433 } | |
| 1434 | |
| 1435 // Make there be nothing here. | |
| 1436 void clear() { | |
| 1437 _jvms = NULL; | |
| 1438 } | |
| 1439 | |
| 1440 // Make a new, clean node notes. | |
| 1441 static Node_Notes* make(Compile* C) { | |
| 1442 Node_Notes* nn = NEW_ARENA_ARRAY(C->comp_arena(), Node_Notes, 1); | |
| 1443 nn->clear(); | |
| 1444 return nn; | |
| 1445 } | |
| 1446 | |
| 1447 Node_Notes* clone(Compile* C) { | |
| 1448 Node_Notes* nn = NEW_ARENA_ARRAY(C->comp_arena(), Node_Notes, 1); | |
| 1449 (*nn) = (*this); | |
| 1450 return nn; | |
| 1451 } | |
| 1452 | |
| 1453 // Absorb any information from source. | |
| 1454 bool update_from(Node_Notes* source) { | |
| 1455 bool changed = false; | |
| 1456 if (source != NULL) { | |
| 1457 if (source->jvms() != NULL) { | |
| 1458 set_jvms(source->jvms()); | |
| 1459 changed = true; | |
| 1460 } | |
| 1461 } | |
| 1462 return changed; | |
| 1463 } | |
| 1464 }; | |
| 1465 | |
| 1466 // Inlined accessors for Compile::node_nodes that require the preceding class: | |
| 1467 inline Node_Notes* | |
| 1468 Compile::locate_node_notes(GrowableArray<Node_Notes*>* arr, | |
| 1469 int idx, bool can_grow) { | |
| 1470 assert(idx >= 0, "oob"); | |
| 1471 int block_idx = (idx >> _log2_node_notes_block_size); | |
| 1472 int grow_by = (block_idx - (arr == NULL? 0: arr->length())); | |
| 1473 if (grow_by >= 0) { | |
| 1474 if (!can_grow) return NULL; | |
| 1475 grow_node_notes(arr, grow_by + 1); | |
| 1476 } | |
| 1477 // (Every element of arr is a sub-array of length _node_notes_block_size.) | |
| 1478 return arr->at(block_idx) + (idx & (_node_notes_block_size-1)); | |
| 1479 } | |
| 1480 | |
| 1481 inline bool | |
| 1482 Compile::set_node_notes_at(int idx, Node_Notes* value) { | |
| 1483 if (value == NULL || value->is_clear()) | |
| 1484 return false; // nothing to write => write nothing | |
| 1485 Node_Notes* loc = locate_node_notes(_node_note_array, idx, true); | |
| 1486 assert(loc != NULL, ""); | |
| 1487 return loc->update_from(value); | |
| 1488 } | |
| 1489 | |
| 1490 | |
| 1491 //------------------------------TypeNode--------------------------------------- | |
| 1492 // Node with a Type constant. | |
| 1493 class TypeNode : public Node { | |
| 1494 protected: | |
| 1495 virtual uint hash() const; // Check the type | |
| 1496 virtual uint cmp( const Node &n ) const; | |
| 1497 virtual uint size_of() const; // Size is bigger | |
| 1498 const Type* const _type; | |
| 1499 public: | |
| 1500 void set_type(const Type* t) { | |
| 1501 assert(t != NULL, "sanity"); | |
| 1502 debug_only(uint check_hash = (VerifyHashTableKeys && _hash_lock) ? hash() : NO_HASH); | |
| 1503 *(const Type**)&_type = t; // cast away const-ness | |
| 1504 // If this node is in the hash table, make sure it doesn't need a rehash. | |
| 1505 assert(check_hash == NO_HASH || check_hash == hash(), "type change must preserve hash code"); | |
| 1506 } | |
| 1507 const Type* type() const { assert(_type != NULL, "sanity"); return _type; }; | |
| 1508 TypeNode( const Type *t, uint required ) : Node(required), _type(t) { | |
| 1509 init_class_id(Class_Type); | |
| 1510 } | |
| 1511 virtual const Type *Value( PhaseTransform *phase ) const; | |
| 1512 virtual const Type *bottom_type() const; | |
| 1513 virtual uint ideal_reg() const; | |
| 1514 #ifndef PRODUCT | |
| 1515 virtual void dump_spec(outputStream *st) const; | |
| 1516 #endif | |
| 1517 }; |