Mercurial > hg > graal-compiler
annotate src/share/vm/opto/node.hpp @ 1081:bd12fff78df5
6904191: OptimizeStringConcat should be product instead of experimental
Summary: Make OptimizeStringConcat a product VM option(contributed by never)
Reviewed-by: never
author | cfang |
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date | Wed, 25 Nov 2009 12:09:02 -0800 |
parents | 7c57aead6d3e |
children | f96a1a986f7b |
rev | line source |
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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 | |
605 | 260 // Input edges are split into two categories. Required edges are required |
0 | 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 | |
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664 CallNode* isa_Call() const { |
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665 return is_Call() ? as_Call() : NULL; |
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666 } |
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667 |
0 | 668 CallNode *as_Call() const { // Only for CallNode (not for MachCallNode) |
669 assert((_class_id & ClassMask_Call) == Class_Call, "invalid node class"); | |
670 return (CallNode*)this; | |
671 } | |
672 | |
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673 #define DEFINE_CLASS_QUERY(type) \ |
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674 bool is_##type() const { \ |
0 | 675 return ((_class_id & ClassMask_##type) == Class_##type); \ |
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676 } \ |
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677 type##Node *as_##type() const { \ |
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678 assert(is_##type(), "invalid node class"); \ |
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679 return (type##Node*)this; \ |
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680 } \ |
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681 type##Node* isa_##type() const { \ |
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682 return (is_##type()) ? as_##type() : NULL; \ |
0 | 683 } |
684 | |
685 DEFINE_CLASS_QUERY(AbstractLock) | |
686 DEFINE_CLASS_QUERY(Add) | |
687 DEFINE_CLASS_QUERY(AddP) | |
688 DEFINE_CLASS_QUERY(Allocate) | |
689 DEFINE_CLASS_QUERY(AllocateArray) | |
690 DEFINE_CLASS_QUERY(Bool) | |
691 DEFINE_CLASS_QUERY(BoxLock) | |
692 DEFINE_CLASS_QUERY(CallDynamicJava) | |
693 DEFINE_CLASS_QUERY(CallJava) | |
694 DEFINE_CLASS_QUERY(CallLeaf) | |
695 DEFINE_CLASS_QUERY(CallRuntime) | |
696 DEFINE_CLASS_QUERY(CallStaticJava) | |
697 DEFINE_CLASS_QUERY(Catch) | |
698 DEFINE_CLASS_QUERY(CatchProj) | |
699 DEFINE_CLASS_QUERY(CheckCastPP) | |
700 DEFINE_CLASS_QUERY(ConstraintCast) | |
701 DEFINE_CLASS_QUERY(CMove) | |
702 DEFINE_CLASS_QUERY(Cmp) | |
703 DEFINE_CLASS_QUERY(CountedLoop) | |
704 DEFINE_CLASS_QUERY(CountedLoopEnd) | |
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705 DEFINE_CLASS_QUERY(DecodeN) |
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706 DEFINE_CLASS_QUERY(EncodeP) |
0 | 707 DEFINE_CLASS_QUERY(FastLock) |
708 DEFINE_CLASS_QUERY(FastUnlock) | |
709 DEFINE_CLASS_QUERY(If) | |
710 DEFINE_CLASS_QUERY(IfFalse) | |
711 DEFINE_CLASS_QUERY(IfTrue) | |
712 DEFINE_CLASS_QUERY(Initialize) | |
713 DEFINE_CLASS_QUERY(Jump) | |
714 DEFINE_CLASS_QUERY(JumpProj) | |
715 DEFINE_CLASS_QUERY(Load) | |
716 DEFINE_CLASS_QUERY(LoadStore) | |
717 DEFINE_CLASS_QUERY(Lock) | |
718 DEFINE_CLASS_QUERY(Loop) | |
719 DEFINE_CLASS_QUERY(Mach) | |
720 DEFINE_CLASS_QUERY(MachCall) | |
721 DEFINE_CLASS_QUERY(MachCallDynamicJava) | |
722 DEFINE_CLASS_QUERY(MachCallJava) | |
723 DEFINE_CLASS_QUERY(MachCallLeaf) | |
724 DEFINE_CLASS_QUERY(MachCallRuntime) | |
725 DEFINE_CLASS_QUERY(MachCallStaticJava) | |
726 DEFINE_CLASS_QUERY(MachIf) | |
727 DEFINE_CLASS_QUERY(MachNullCheck) | |
728 DEFINE_CLASS_QUERY(MachReturn) | |
729 DEFINE_CLASS_QUERY(MachSafePoint) | |
730 DEFINE_CLASS_QUERY(MachSpillCopy) | |
731 DEFINE_CLASS_QUERY(MachTemp) | |
732 DEFINE_CLASS_QUERY(Mem) | |
733 DEFINE_CLASS_QUERY(MemBar) | |
734 DEFINE_CLASS_QUERY(MergeMem) | |
735 DEFINE_CLASS_QUERY(Mul) | |
736 DEFINE_CLASS_QUERY(Multi) | |
737 DEFINE_CLASS_QUERY(MultiBranch) | |
33 | 738 DEFINE_CLASS_QUERY(Parm) |
0 | 739 DEFINE_CLASS_QUERY(PCTable) |
740 DEFINE_CLASS_QUERY(Phi) | |
741 DEFINE_CLASS_QUERY(Proj) | |
742 DEFINE_CLASS_QUERY(Region) | |
743 DEFINE_CLASS_QUERY(Root) | |
744 DEFINE_CLASS_QUERY(SafePoint) | |
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745 DEFINE_CLASS_QUERY(SafePointScalarObject) |
0 | 746 DEFINE_CLASS_QUERY(Start) |
747 DEFINE_CLASS_QUERY(Store) | |
748 DEFINE_CLASS_QUERY(Sub) | |
749 DEFINE_CLASS_QUERY(Type) | |
750 DEFINE_CLASS_QUERY(Unlock) | |
751 | |
752 #undef DEFINE_CLASS_QUERY | |
753 | |
754 // duplicate of is_MachSpillCopy() | |
755 bool is_SpillCopy () const { | |
756 return ((_class_id & ClassMask_MachSpillCopy) == Class_MachSpillCopy); | |
757 } | |
758 | |
759 bool is_Con () const { return (_flags & Flag_is_Con) != 0; } | |
760 bool is_Goto() const { return (_flags & Flag_is_Goto) != 0; } | |
761 // The data node which is safe to leave in dead loop during IGVN optimization. | |
762 bool is_dead_loop_safe() const { | |
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763 return is_Phi() || (is_Proj() && in(0) == NULL) || |
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764 ((_flags & (Flag_is_dead_loop_safe | Flag_is_Con)) != 0 && |
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765 (!is_Proj() || !in(0)->is_Allocate())); |
0 | 766 } |
767 | |
768 // is_Copy() returns copied edge index (0 or 1) | |
769 uint is_Copy() const { return (_flags & Flag_is_Copy); } | |
770 | |
771 virtual bool is_CFG() const { return false; } | |
772 | |
773 // If this node is control-dependent on a test, can it be | |
774 // rerouted to a dominating equivalent test? This is usually | |
775 // true of non-CFG nodes, but can be false for operations which | |
776 // depend for their correct sequencing on more than one test. | |
777 // (In that case, hoisting to a dominating test may silently | |
778 // skip some other important test.) | |
779 virtual bool depends_only_on_test() const { assert(!is_CFG(), ""); return true; }; | |
780 | |
781 // defined for MachNodes that match 'If' | 'Goto' | 'CountedLoopEnd' | |
782 bool is_Branch() const { return (_flags & Flag_is_Branch) != 0; } | |
783 | |
784 // When building basic blocks, I need to have a notion of block beginning | |
785 // Nodes, next block selector Nodes (block enders), and next block | |
786 // projections. These calls need to work on their machine equivalents. The | |
787 // Ideal beginning Nodes are RootNode, RegionNode and StartNode. | |
788 bool is_block_start() const { | |
789 if ( is_Region() ) | |
790 return this == (const Node*)in(0); | |
791 else | |
792 return (_flags & Flag_is_block_start) != 0; | |
793 } | |
794 | |
795 // The Ideal control projection Nodes are IfTrue/IfFalse, JumpProjNode, Root, | |
796 // Goto and Return. This call also returns the block ending Node. | |
797 virtual const Node *is_block_proj() const; | |
798 | |
799 // The node is a "macro" node which needs to be expanded before matching | |
800 bool is_macro() const { return (_flags & Flag_is_macro) != 0; } | |
801 | |
802 // Value is a vector of primitive values | |
803 bool is_Vector() const { return (_flags & Flag_is_Vector) != 0; } | |
804 | |
805 //----------------- Optimization | |
806 | |
807 // Get the worst-case Type output for this Node. | |
808 virtual const class Type *bottom_type() const; | |
809 | |
810 // If we find a better type for a node, try to record it permanently. | |
811 // Return true if this node actually changed. | |
812 // Be sure to do the hash_delete game in the "rehash" variant. | |
813 void raise_bottom_type(const Type* new_type); | |
814 | |
815 // Get the address type with which this node uses and/or defs memory, | |
816 // or NULL if none. The address type is conservatively wide. | |
817 // Returns non-null for calls, membars, loads, stores, etc. | |
818 // Returns TypePtr::BOTTOM if the node touches memory "broadly". | |
819 virtual const class TypePtr *adr_type() const { return NULL; } | |
820 | |
821 // Return an existing node which computes the same function as this node. | |
822 // The optimistic combined algorithm requires this to return a Node which | |
823 // is a small number of steps away (e.g., one of my inputs). | |
824 virtual Node *Identity( PhaseTransform *phase ); | |
825 | |
826 // Return the set of values this Node can take on at runtime. | |
827 virtual const Type *Value( PhaseTransform *phase ) const; | |
828 | |
829 // Return a node which is more "ideal" than the current node. | |
830 // The invariants on this call are subtle. If in doubt, read the | |
831 // treatise in node.cpp above the default implemention AND TEST WITH | |
832 // +VerifyIterativeGVN! | |
833 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); | |
834 | |
835 // Some nodes have specific Ideal subgraph transformations only if they are | |
836 // unique users of specific nodes. Such nodes should be put on IGVN worklist | |
837 // for the transformations to happen. | |
838 bool has_special_unique_user() const; | |
839 | |
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840 // Skip Proj and CatchProj nodes chains. Check for Null and Top. |
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841 Node* find_exact_control(Node* ctrl); |
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842 |
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843 // Check if 'this' node dominates or equal to 'sub'. |
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844 bool dominates(Node* sub, Node_List &nlist); |
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845 |
0 | 846 protected: |
847 bool remove_dead_region(PhaseGVN *phase, bool can_reshape); | |
848 public: | |
849 | |
850 // Idealize graph, using DU info. Done after constant propagation | |
851 virtual Node *Ideal_DU_postCCP( PhaseCCP *ccp ); | |
852 | |
853 // See if there is valid pipeline info | |
854 static const Pipeline *pipeline_class(); | |
855 virtual const Pipeline *pipeline() const; | |
856 | |
857 // Compute the latency from the def to this instruction of the ith input node | |
858 uint latency(uint i); | |
859 | |
860 // Hash & compare functions, for pessimistic value numbering | |
861 | |
862 // If the hash function returns the special sentinel value NO_HASH, | |
863 // the node is guaranteed never to compare equal to any other node. | |
605 | 864 // If we accidentally generate a hash with value NO_HASH the node |
0 | 865 // won't go into the table and we'll lose a little optimization. |
866 enum { NO_HASH = 0 }; | |
867 virtual uint hash() const; | |
868 virtual uint cmp( const Node &n ) const; | |
869 | |
870 // Operation appears to be iteratively computed (such as an induction variable) | |
871 // It is possible for this operation to return false for a loop-varying | |
872 // value, if it appears (by local graph inspection) to be computed by a simple conditional. | |
873 bool is_iteratively_computed(); | |
874 | |
875 // Determine if a node is Counted loop induction variable. | |
876 // The method is defined in loopnode.cpp. | |
877 const Node* is_loop_iv() const; | |
878 | |
879 // Return a node with opcode "opc" and same inputs as "this" if one can | |
880 // be found; Otherwise return NULL; | |
881 Node* find_similar(int opc); | |
882 | |
883 // Return the unique control out if only one. Null if none or more than one. | |
884 Node* unique_ctrl_out(); | |
885 | |
886 //----------------- Code Generation | |
887 | |
888 // Ideal register class for Matching. Zero means unmatched instruction | |
889 // (these are cloned instead of converted to machine nodes). | |
890 virtual uint ideal_reg() const; | |
891 | |
892 static const uint NotAMachineReg; // must be > max. machine register | |
893 | |
894 // Do we Match on this edge index or not? Generally false for Control | |
895 // and true for everything else. Weird for calls & returns. | |
896 virtual uint match_edge(uint idx) const; | |
897 | |
898 // Register class output is returned in | |
899 virtual const RegMask &out_RegMask() const; | |
900 // Register class input is expected in | |
901 virtual const RegMask &in_RegMask(uint) const; | |
902 // Should we clone rather than spill this instruction? | |
903 bool rematerialize() const; | |
904 | |
905 // Return JVM State Object if this Node carries debug info, or NULL otherwise | |
906 virtual JVMState* jvms() const; | |
907 | |
908 // Print as assembly | |
909 virtual void format( PhaseRegAlloc *, outputStream* st = tty ) const; | |
910 // Emit bytes starting at parameter 'ptr' | |
911 // Bump 'ptr' by the number of output bytes | |
912 virtual void emit(CodeBuffer &cbuf, PhaseRegAlloc *ra_) const; | |
913 // Size of instruction in bytes | |
914 virtual uint size(PhaseRegAlloc *ra_) const; | |
915 | |
916 // Convenience function to extract an integer constant from a node. | |
917 // If it is not an integer constant (either Con, CastII, or Mach), | |
918 // return value_if_unknown. | |
919 jint find_int_con(jint value_if_unknown) const { | |
920 const TypeInt* t = find_int_type(); | |
921 return (t != NULL && t->is_con()) ? t->get_con() : value_if_unknown; | |
922 } | |
923 // Return the constant, knowing it is an integer constant already | |
924 jint get_int() const { | |
925 const TypeInt* t = find_int_type(); | |
926 guarantee(t != NULL, "must be con"); | |
927 return t->get_con(); | |
928 } | |
929 // Here's where the work is done. Can produce non-constant int types too. | |
930 const TypeInt* find_int_type() const; | |
931 | |
932 // Same thing for long (and intptr_t, via type.hpp): | |
933 jlong get_long() const { | |
934 const TypeLong* t = find_long_type(); | |
935 guarantee(t != NULL, "must be con"); | |
936 return t->get_con(); | |
937 } | |
938 jlong find_long_con(jint value_if_unknown) const { | |
939 const TypeLong* t = find_long_type(); | |
940 return (t != NULL && t->is_con()) ? t->get_con() : value_if_unknown; | |
941 } | |
942 const TypeLong* find_long_type() const; | |
943 | |
944 // These guys are called by code generated by ADLC: | |
945 intptr_t get_ptr() const; | |
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946 intptr_t get_narrowcon() const; |
0 | 947 jdouble getd() const; |
948 jfloat getf() const; | |
949 | |
950 // Nodes which are pinned into basic blocks | |
951 virtual bool pinned() const { return false; } | |
952 | |
953 // Nodes which use memory without consuming it, hence need antidependences | |
954 // More specifically, needs_anti_dependence_check returns true iff the node | |
955 // (a) does a load, and (b) does not perform a store (except perhaps to a | |
956 // stack slot or some other unaliased location). | |
957 bool needs_anti_dependence_check() const; | |
958 | |
959 // Return which operand this instruction may cisc-spill. In other words, | |
960 // return operand position that can convert from reg to memory access | |
961 virtual int cisc_operand() const { return AdlcVMDeps::Not_cisc_spillable; } | |
962 bool is_cisc_alternate() const { return (_flags & Flag_is_cisc_alternate) != 0; } | |
963 | |
964 //----------------- Graph walking | |
965 public: | |
966 // Walk and apply member functions recursively. | |
967 // Supplied (this) pointer is root. | |
968 void walk(NFunc pre, NFunc post, void *env); | |
969 static void nop(Node &, void*); // Dummy empty function | |
970 static void packregion( Node &n, void* ); | |
971 private: | |
972 void walk_(NFunc pre, NFunc post, void *env, VectorSet &visited); | |
973 | |
974 //----------------- Printing, etc | |
975 public: | |
976 #ifndef PRODUCT | |
977 Node* find(int idx) const; // Search the graph for the given idx. | |
978 Node* find_ctrl(int idx) const; // Search control ancestors for the given idx. | |
979 void dump() const; // Print this node, | |
980 void dump(int depth) const; // Print this node, recursively to depth d | |
981 void dump_ctrl(int depth) const; // Print control nodes, to depth d | |
982 virtual void dump_req() const; // Print required-edge info | |
983 virtual void dump_prec() const; // Print precedence-edge info | |
984 virtual void dump_out() const; // Print the output edge info | |
985 virtual void dump_spec(outputStream *st) const {}; // Print per-node info | |
986 void verify_edges(Unique_Node_List &visited); // Verify bi-directional edges | |
987 void verify() const; // Check Def-Use info for my subgraph | |
988 static void verify_recur(const Node *n, int verify_depth, VectorSet &old_space, VectorSet &new_space); | |
989 | |
990 // This call defines a class-unique string used to identify class instances | |
991 virtual const char *Name() const; | |
992 | |
993 void dump_format(PhaseRegAlloc *ra) const; // debug access to MachNode::format(...) | |
994 // RegMask Print Functions | |
995 void dump_in_regmask(int idx) { in_RegMask(idx).dump(); } | |
996 void dump_out_regmask() { out_RegMask().dump(); } | |
997 static int _in_dump_cnt; | |
998 static bool in_dump() { return _in_dump_cnt > 0; } | |
999 void fast_dump() const { | |
1000 tty->print("%4d: %-17s", _idx, Name()); | |
1001 for (uint i = 0; i < len(); i++) | |
1002 if (in(i)) | |
1003 tty->print(" %4d", in(i)->_idx); | |
1004 else | |
1005 tty->print(" NULL"); | |
1006 tty->print("\n"); | |
1007 } | |
1008 #endif | |
1009 #ifdef ASSERT | |
1010 void verify_construction(); | |
1011 bool verify_jvms(const JVMState* jvms) const; | |
1012 int _debug_idx; // Unique value assigned to every node. | |
1013 int debug_idx() const { return _debug_idx; } | |
1014 void set_debug_idx( int debug_idx ) { _debug_idx = debug_idx; } | |
1015 | |
1016 Node* _debug_orig; // Original version of this, if any. | |
1017 Node* debug_orig() const { return _debug_orig; } | |
1018 void set_debug_orig(Node* orig); // _debug_orig = orig | |
1019 | |
1020 int _hash_lock; // Barrier to modifications of nodes in the hash table | |
1021 void enter_hash_lock() { ++_hash_lock; assert(_hash_lock < 99, "in too many hash tables?"); } | |
1022 void exit_hash_lock() { --_hash_lock; assert(_hash_lock >= 0, "mispaired hash locks"); } | |
1023 | |
1024 static void init_NodeProperty(); | |
1025 | |
1026 #if OPTO_DU_ITERATOR_ASSERT | |
1027 const Node* _last_del; // The last deleted node. | |
1028 uint _del_tick; // Bumped when a deletion happens.. | |
1029 #endif | |
1030 #endif | |
1031 }; | |
1032 | |
1033 //----------------------------------------------------------------------------- | |
1034 // Iterators over DU info, and associated Node functions. | |
1035 | |
1036 #if OPTO_DU_ITERATOR_ASSERT | |
1037 | |
1038 // Common code for assertion checking on DU iterators. | |
1039 class DUIterator_Common VALUE_OBJ_CLASS_SPEC { | |
1040 #ifdef ASSERT | |
1041 protected: | |
1042 bool _vdui; // cached value of VerifyDUIterators | |
1043 const Node* _node; // the node containing the _out array | |
1044 uint _outcnt; // cached node->_outcnt | |
1045 uint _del_tick; // cached node->_del_tick | |
1046 Node* _last; // last value produced by the iterator | |
1047 | |
1048 void sample(const Node* node); // used by c'tor to set up for verifies | |
1049 void verify(const Node* node, bool at_end_ok = false); | |
1050 void verify_resync(); | |
1051 void reset(const DUIterator_Common& that); | |
1052 | |
1053 // The VDUI_ONLY macro protects code conditionalized on VerifyDUIterators | |
1054 #define I_VDUI_ONLY(i,x) { if ((i)._vdui) { x; } } | |
1055 #else | |
1056 #define I_VDUI_ONLY(i,x) { } | |
1057 #endif //ASSERT | |
1058 }; | |
1059 | |
1060 #define VDUI_ONLY(x) I_VDUI_ONLY(*this, x) | |
1061 | |
1062 // Default DU iterator. Allows appends onto the out array. | |
1063 // Allows deletion from the out array only at the current point. | |
1064 // Usage: | |
1065 // for (DUIterator i = x->outs(); x->has_out(i); i++) { | |
1066 // Node* y = x->out(i); | |
1067 // ... | |
1068 // } | |
1069 // Compiles in product mode to a unsigned integer index, which indexes | |
1070 // onto a repeatedly reloaded base pointer of x->_out. The loop predicate | |
1071 // also reloads x->_outcnt. If you delete, you must perform "--i" just | |
1072 // before continuing the loop. You must delete only the last-produced | |
1073 // edge. You must delete only a single copy of the last-produced edge, | |
1074 // or else you must delete all copies at once (the first time the edge | |
1075 // is produced by the iterator). | |
1076 class DUIterator : public DUIterator_Common { | |
1077 friend class Node; | |
1078 | |
1079 // This is the index which provides the product-mode behavior. | |
1080 // Whatever the product-mode version of the system does to the | |
1081 // DUI index is done to this index. All other fields in | |
1082 // this class are used only for assertion checking. | |
1083 uint _idx; | |
1084 | |
1085 #ifdef ASSERT | |
1086 uint _refresh_tick; // Records the refresh activity. | |
1087 | |
1088 void sample(const Node* node); // Initialize _refresh_tick etc. | |
1089 void verify(const Node* node, bool at_end_ok = false); | |
1090 void verify_increment(); // Verify an increment operation. | |
1091 void verify_resync(); // Verify that we can back up over a deletion. | |
1092 void verify_finish(); // Verify that the loop terminated properly. | |
1093 void refresh(); // Resample verification info. | |
1094 void reset(const DUIterator& that); // Resample after assignment. | |
1095 #endif | |
1096 | |
1097 DUIterator(const Node* node, int dummy_to_avoid_conversion) | |
1098 { _idx = 0; debug_only(sample(node)); } | |
1099 | |
1100 public: | |
1101 // initialize to garbage; clear _vdui to disable asserts | |
1102 DUIterator() | |
1103 { /*initialize to garbage*/ debug_only(_vdui = false); } | |
1104 | |
1105 void operator++(int dummy_to_specify_postfix_op) | |
1106 { _idx++; VDUI_ONLY(verify_increment()); } | |
1107 | |
1108 void operator--() | |
1109 { VDUI_ONLY(verify_resync()); --_idx; } | |
1110 | |
1111 ~DUIterator() | |
1112 { VDUI_ONLY(verify_finish()); } | |
1113 | |
1114 void operator=(const DUIterator& that) | |
1115 { _idx = that._idx; debug_only(reset(that)); } | |
1116 }; | |
1117 | |
1118 DUIterator Node::outs() const | |
1119 { return DUIterator(this, 0); } | |
1120 DUIterator& Node::refresh_out_pos(DUIterator& i) const | |
1121 { I_VDUI_ONLY(i, i.refresh()); return i; } | |
1122 bool Node::has_out(DUIterator& i) const | |
1123 { I_VDUI_ONLY(i, i.verify(this,true));return i._idx < _outcnt; } | |
1124 Node* Node::out(DUIterator& i) const | |
1125 { I_VDUI_ONLY(i, i.verify(this)); return debug_only(i._last=) _out[i._idx]; } | |
1126 | |
1127 | |
1128 // Faster DU iterator. Disallows insertions into the out array. | |
1129 // Allows deletion from the out array only at the current point. | |
1130 // Usage: | |
1131 // for (DUIterator_Fast imax, i = x->fast_outs(imax); i < imax; i++) { | |
1132 // Node* y = x->fast_out(i); | |
1133 // ... | |
1134 // } | |
1135 // Compiles in product mode to raw Node** pointer arithmetic, with | |
1136 // no reloading of pointers from the original node x. If you delete, | |
1137 // you must perform "--i; --imax" just before continuing the loop. | |
1138 // If you delete multiple copies of the same edge, you must decrement | |
1139 // imax, but not i, multiple times: "--i, imax -= num_edges". | |
1140 class DUIterator_Fast : public DUIterator_Common { | |
1141 friend class Node; | |
1142 friend class DUIterator_Last; | |
1143 | |
1144 // This is the pointer which provides the product-mode behavior. | |
1145 // Whatever the product-mode version of the system does to the | |
1146 // DUI pointer is done to this pointer. All other fields in | |
1147 // this class are used only for assertion checking. | |
1148 Node** _outp; | |
1149 | |
1150 #ifdef ASSERT | |
1151 void verify(const Node* node, bool at_end_ok = false); | |
1152 void verify_limit(); | |
1153 void verify_resync(); | |
1154 void verify_relimit(uint n); | |
1155 void reset(const DUIterator_Fast& that); | |
1156 #endif | |
1157 | |
1158 // Note: offset must be signed, since -1 is sometimes passed | |
1159 DUIterator_Fast(const Node* node, ptrdiff_t offset) | |
1160 { _outp = node->_out + offset; debug_only(sample(node)); } | |
1161 | |
1162 public: | |
1163 // initialize to garbage; clear _vdui to disable asserts | |
1164 DUIterator_Fast() | |
1165 { /*initialize to garbage*/ debug_only(_vdui = false); } | |
1166 | |
1167 void operator++(int dummy_to_specify_postfix_op) | |
1168 { _outp++; VDUI_ONLY(verify(_node, true)); } | |
1169 | |
1170 void operator--() | |
1171 { VDUI_ONLY(verify_resync()); --_outp; } | |
1172 | |
1173 void operator-=(uint n) // applied to the limit only | |
1174 { _outp -= n; VDUI_ONLY(verify_relimit(n)); } | |
1175 | |
1176 bool operator<(DUIterator_Fast& limit) { | |
1177 I_VDUI_ONLY(*this, this->verify(_node, true)); | |
1178 I_VDUI_ONLY(limit, limit.verify_limit()); | |
1179 return _outp < limit._outp; | |
1180 } | |
1181 | |
1182 void operator=(const DUIterator_Fast& that) | |
1183 { _outp = that._outp; debug_only(reset(that)); } | |
1184 }; | |
1185 | |
1186 DUIterator_Fast Node::fast_outs(DUIterator_Fast& imax) const { | |
1187 // Assign a limit pointer to the reference argument: | |
1188 imax = DUIterator_Fast(this, (ptrdiff_t)_outcnt); | |
1189 // Return the base pointer: | |
1190 return DUIterator_Fast(this, 0); | |
1191 } | |
1192 Node* Node::fast_out(DUIterator_Fast& i) const { | |
1193 I_VDUI_ONLY(i, i.verify(this)); | |
1194 return debug_only(i._last=) *i._outp; | |
1195 } | |
1196 | |
1197 | |
1198 // Faster DU iterator. Requires each successive edge to be removed. | |
1199 // Does not allow insertion of any edges. | |
1200 // Usage: | |
1201 // for (DUIterator_Last imin, i = x->last_outs(imin); i >= imin; i -= num_edges) { | |
1202 // Node* y = x->last_out(i); | |
1203 // ... | |
1204 // } | |
1205 // Compiles in product mode to raw Node** pointer arithmetic, with | |
1206 // no reloading of pointers from the original node x. | |
1207 class DUIterator_Last : private DUIterator_Fast { | |
1208 friend class Node; | |
1209 | |
1210 #ifdef ASSERT | |
1211 void verify(const Node* node, bool at_end_ok = false); | |
1212 void verify_limit(); | |
1213 void verify_step(uint num_edges); | |
1214 #endif | |
1215 | |
1216 // Note: offset must be signed, since -1 is sometimes passed | |
1217 DUIterator_Last(const Node* node, ptrdiff_t offset) | |
1218 : DUIterator_Fast(node, offset) { } | |
1219 | |
1220 void operator++(int dummy_to_specify_postfix_op) {} // do not use | |
1221 void operator<(int) {} // do not use | |
1222 | |
1223 public: | |
1224 DUIterator_Last() { } | |
1225 // initialize to garbage | |
1226 | |
1227 void operator--() | |
1228 { _outp--; VDUI_ONLY(verify_step(1)); } | |
1229 | |
1230 void operator-=(uint n) | |
1231 { _outp -= n; VDUI_ONLY(verify_step(n)); } | |
1232 | |
1233 bool operator>=(DUIterator_Last& limit) { | |
1234 I_VDUI_ONLY(*this, this->verify(_node, true)); | |
1235 I_VDUI_ONLY(limit, limit.verify_limit()); | |
1236 return _outp >= limit._outp; | |
1237 } | |
1238 | |
1239 void operator=(const DUIterator_Last& that) | |
1240 { DUIterator_Fast::operator=(that); } | |
1241 }; | |
1242 | |
1243 DUIterator_Last Node::last_outs(DUIterator_Last& imin) const { | |
1244 // Assign a limit pointer to the reference argument: | |
1245 imin = DUIterator_Last(this, 0); | |
1246 // Return the initial pointer: | |
1247 return DUIterator_Last(this, (ptrdiff_t)_outcnt - 1); | |
1248 } | |
1249 Node* Node::last_out(DUIterator_Last& i) const { | |
1250 I_VDUI_ONLY(i, i.verify(this)); | |
1251 return debug_only(i._last=) *i._outp; | |
1252 } | |
1253 | |
1254 #endif //OPTO_DU_ITERATOR_ASSERT | |
1255 | |
1256 #undef I_VDUI_ONLY | |
1257 #undef VDUI_ONLY | |
1258 | |
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1259 // An Iterator that truly follows the iterator pattern. Doesn't |
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1260 // support deletion but could be made to. |
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1261 // |
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1262 // for (SimpleDUIterator i(n); i.has_next(); i.next()) { |
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1263 // Node* m = i.get(); |
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1264 // |
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1265 class SimpleDUIterator : public StackObj { |
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1266 private: |
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1267 Node* node; |
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1268 DUIterator_Fast i; |
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1269 DUIterator_Fast imax; |
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1270 public: |
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1271 SimpleDUIterator(Node* n): node(n), i(n->fast_outs(imax)) {} |
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1272 bool has_next() { return i < imax; } |
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1273 void next() { i++; } |
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1274 Node* get() { return node->fast_out(i); } |
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1275 }; |
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1276 |
0 | 1277 |
1278 //----------------------------------------------------------------------------- | |
1279 // Map dense integer indices to Nodes. Uses classic doubling-array trick. | |
1280 // Abstractly provides an infinite array of Node*'s, initialized to NULL. | |
1281 // Note that the constructor just zeros things, and since I use Arena | |
1282 // allocation I do not need a destructor to reclaim storage. | |
1283 class Node_Array : public ResourceObj { | |
1284 protected: | |
1285 Arena *_a; // Arena to allocate in | |
1286 uint _max; | |
1287 Node **_nodes; | |
1288 void grow( uint i ); // Grow array node to fit | |
1289 public: | |
1290 Node_Array(Arena *a) : _a(a), _max(OptoNodeListSize) { | |
1291 _nodes = NEW_ARENA_ARRAY( a, Node *, OptoNodeListSize ); | |
1292 for( int i = 0; i < OptoNodeListSize; i++ ) { | |
1293 _nodes[i] = NULL; | |
1294 } | |
1295 } | |
1296 | |
1297 Node_Array(Node_Array *na) : _a(na->_a), _max(na->_max), _nodes(na->_nodes) {} | |
1298 Node *operator[] ( uint i ) const // Lookup, or NULL for not mapped | |
1299 { return (i<_max) ? _nodes[i] : (Node*)NULL; } | |
1300 Node *at( uint i ) const { assert(i<_max,"oob"); return _nodes[i]; } | |
1301 Node **adr() { return _nodes; } | |
1302 // Extend the mapping: index i maps to Node *n. | |
1303 void map( uint i, Node *n ) { if( i>=_max ) grow(i); _nodes[i] = n; } | |
1304 void insert( uint i, Node *n ); | |
1305 void remove( uint i ); // Remove, preserving order | |
1306 void sort( C_sort_func_t func); | |
1307 void reset( Arena *new_a ); // Zap mapping to empty; reclaim storage | |
1308 void clear(); // Set all entries to NULL, keep storage | |
1309 uint Size() const { return _max; } | |
1310 void dump() const; | |
1311 }; | |
1312 | |
1313 class Node_List : public Node_Array { | |
1314 uint _cnt; | |
1315 public: | |
1316 Node_List() : Node_Array(Thread::current()->resource_area()), _cnt(0) {} | |
1317 Node_List(Arena *a) : Node_Array(a), _cnt(0) {} | |
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1318 bool contains(Node* n) { |
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1319 for (uint e = 0; e < size(); e++) { |
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1320 if (at(e) == n) return true; |
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1321 } |
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1322 return false; |
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1323 } |
0 | 1324 void insert( uint i, Node *n ) { Node_Array::insert(i,n); _cnt++; } |
1325 void remove( uint i ) { Node_Array::remove(i); _cnt--; } | |
1326 void push( Node *b ) { map(_cnt++,b); } | |
1327 void yank( Node *n ); // Find and remove | |
1328 Node *pop() { return _nodes[--_cnt]; } | |
1329 Node *rpop() { Node *b = _nodes[0]; _nodes[0]=_nodes[--_cnt]; return b;} | |
1330 void clear() { _cnt = 0; Node_Array::clear(); } // retain storage | |
1331 uint size() const { return _cnt; } | |
1332 void dump() const; | |
1333 }; | |
1334 | |
1335 //------------------------------Unique_Node_List------------------------------- | |
1336 class Unique_Node_List : public Node_List { | |
1337 VectorSet _in_worklist; | |
1338 uint _clock_index; // Index in list where to pop from next | |
1339 public: | |
1340 Unique_Node_List() : Node_List(), _in_worklist(Thread::current()->resource_area()), _clock_index(0) {} | |
1341 Unique_Node_List(Arena *a) : Node_List(a), _in_worklist(a), _clock_index(0) {} | |
1342 | |
1343 void remove( Node *n ); | |
1344 bool member( Node *n ) { return _in_worklist.test(n->_idx) != 0; } | |
1345 VectorSet &member_set(){ return _in_worklist; } | |
1346 | |
1347 void push( Node *b ) { | |
1348 if( !_in_worklist.test_set(b->_idx) ) | |
1349 Node_List::push(b); | |
1350 } | |
1351 Node *pop() { | |
1352 if( _clock_index >= size() ) _clock_index = 0; | |
1353 Node *b = at(_clock_index); | |
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1354 map( _clock_index, Node_List::pop()); |
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1355 if (size() != 0) _clock_index++; // Always start from 0 |
0 | 1356 _in_worklist >>= b->_idx; |
1357 return b; | |
1358 } | |
1359 Node *remove( uint i ) { | |
1360 Node *b = Node_List::at(i); | |
1361 _in_worklist >>= b->_idx; | |
1362 map(i,Node_List::pop()); | |
1363 return b; | |
1364 } | |
1365 void yank( Node *n ) { _in_worklist >>= n->_idx; Node_List::yank(n); } | |
1366 void clear() { | |
1367 _in_worklist.Clear(); // Discards storage but grows automatically | |
1368 Node_List::clear(); | |
1369 _clock_index = 0; | |
1370 } | |
1371 | |
1372 // Used after parsing to remove useless nodes before Iterative GVN | |
1373 void remove_useless_nodes(VectorSet &useful); | |
1374 | |
1375 #ifndef PRODUCT | |
1376 void print_set() const { _in_worklist.print(); } | |
1377 #endif | |
1378 }; | |
1379 | |
1380 // Inline definition of Compile::record_for_igvn must be deferred to this point. | |
1381 inline void Compile::record_for_igvn(Node* n) { | |
1382 _for_igvn->push(n); | |
1383 } | |
1384 | |
1385 //------------------------------Node_Stack------------------------------------- | |
1386 class Node_Stack { | |
1387 protected: | |
1388 struct INode { | |
1389 Node *node; // Processed node | |
1390 uint indx; // Index of next node's child | |
1391 }; | |
1392 INode *_inode_top; // tos, stack grows up | |
1393 INode *_inode_max; // End of _inodes == _inodes + _max | |
1394 INode *_inodes; // Array storage for the stack | |
1395 Arena *_a; // Arena to allocate in | |
1396 void grow(); | |
1397 public: | |
1398 Node_Stack(int size) { | |
1399 size_t max = (size > OptoNodeListSize) ? size : OptoNodeListSize; | |
1400 _a = Thread::current()->resource_area(); | |
1401 _inodes = NEW_ARENA_ARRAY( _a, INode, max ); | |
1402 _inode_max = _inodes + max; | |
1403 _inode_top = _inodes - 1; // stack is empty | |
1404 } | |
1405 | |
1406 Node_Stack(Arena *a, int size) : _a(a) { | |
1407 size_t max = (size > OptoNodeListSize) ? size : OptoNodeListSize; | |
1408 _inodes = NEW_ARENA_ARRAY( _a, INode, max ); | |
1409 _inode_max = _inodes + max; | |
1410 _inode_top = _inodes - 1; // stack is empty | |
1411 } | |
1412 | |
1413 void pop() { | |
1414 assert(_inode_top >= _inodes, "node stack underflow"); | |
1415 --_inode_top; | |
1416 } | |
1417 void push(Node *n, uint i) { | |
1418 ++_inode_top; | |
1419 if (_inode_top >= _inode_max) grow(); | |
1420 INode *top = _inode_top; // optimization | |
1421 top->node = n; | |
1422 top->indx = i; | |
1423 } | |
1424 Node *node() const { | |
1425 return _inode_top->node; | |
1426 } | |
1427 Node* node_at(uint i) const { | |
1428 assert(_inodes + i <= _inode_top, "in range"); | |
1429 return _inodes[i].node; | |
1430 } | |
1431 uint index() const { | |
1432 return _inode_top->indx; | |
1433 } | |
247 | 1434 uint index_at(uint i) const { |
1435 assert(_inodes + i <= _inode_top, "in range"); | |
1436 return _inodes[i].indx; | |
1437 } | |
0 | 1438 void set_node(Node *n) { |
1439 _inode_top->node = n; | |
1440 } | |
1441 void set_index(uint i) { | |
1442 _inode_top->indx = i; | |
1443 } | |
1444 uint size_max() const { return (uint)pointer_delta(_inode_max, _inodes, sizeof(INode)); } // Max size | |
40 | 1445 uint size() const { return (uint)pointer_delta((_inode_top+1), _inodes, sizeof(INode)); } // Current size |
0 | 1446 bool is_nonempty() const { return (_inode_top >= _inodes); } |
1447 bool is_empty() const { return (_inode_top < _inodes); } | |
1448 void clear() { _inode_top = _inodes - 1; } // retain storage | |
1449 }; | |
1450 | |
1451 | |
1452 //-----------------------------Node_Notes-------------------------------------- | |
1453 // Debugging or profiling annotations loosely and sparsely associated | |
1454 // with some nodes. See Compile::node_notes_at for the accessor. | |
1455 class Node_Notes VALUE_OBJ_CLASS_SPEC { | |
1456 JVMState* _jvms; | |
1457 | |
1458 public: | |
1459 Node_Notes(JVMState* jvms = NULL) { | |
1460 _jvms = jvms; | |
1461 } | |
1462 | |
1463 JVMState* jvms() { return _jvms; } | |
1464 void set_jvms(JVMState* x) { _jvms = x; } | |
1465 | |
1466 // True if there is nothing here. | |
1467 bool is_clear() { | |
1468 return (_jvms == NULL); | |
1469 } | |
1470 | |
1471 // Make there be nothing here. | |
1472 void clear() { | |
1473 _jvms = NULL; | |
1474 } | |
1475 | |
1476 // Make a new, clean node notes. | |
1477 static Node_Notes* make(Compile* C) { | |
1478 Node_Notes* nn = NEW_ARENA_ARRAY(C->comp_arena(), Node_Notes, 1); | |
1479 nn->clear(); | |
1480 return nn; | |
1481 } | |
1482 | |
1483 Node_Notes* clone(Compile* C) { | |
1484 Node_Notes* nn = NEW_ARENA_ARRAY(C->comp_arena(), Node_Notes, 1); | |
1485 (*nn) = (*this); | |
1486 return nn; | |
1487 } | |
1488 | |
1489 // Absorb any information from source. | |
1490 bool update_from(Node_Notes* source) { | |
1491 bool changed = false; | |
1492 if (source != NULL) { | |
1493 if (source->jvms() != NULL) { | |
1494 set_jvms(source->jvms()); | |
1495 changed = true; | |
1496 } | |
1497 } | |
1498 return changed; | |
1499 } | |
1500 }; | |
1501 | |
1502 // Inlined accessors for Compile::node_nodes that require the preceding class: | |
1503 inline Node_Notes* | |
1504 Compile::locate_node_notes(GrowableArray<Node_Notes*>* arr, | |
1505 int idx, bool can_grow) { | |
1506 assert(idx >= 0, "oob"); | |
1507 int block_idx = (idx >> _log2_node_notes_block_size); | |
1508 int grow_by = (block_idx - (arr == NULL? 0: arr->length())); | |
1509 if (grow_by >= 0) { | |
1510 if (!can_grow) return NULL; | |
1511 grow_node_notes(arr, grow_by + 1); | |
1512 } | |
1513 // (Every element of arr is a sub-array of length _node_notes_block_size.) | |
1514 return arr->at(block_idx) + (idx & (_node_notes_block_size-1)); | |
1515 } | |
1516 | |
1517 inline bool | |
1518 Compile::set_node_notes_at(int idx, Node_Notes* value) { | |
1519 if (value == NULL || value->is_clear()) | |
1520 return false; // nothing to write => write nothing | |
1521 Node_Notes* loc = locate_node_notes(_node_note_array, idx, true); | |
1522 assert(loc != NULL, ""); | |
1523 return loc->update_from(value); | |
1524 } | |
1525 | |
1526 | |
1527 //------------------------------TypeNode--------------------------------------- | |
1528 // Node with a Type constant. | |
1529 class TypeNode : public Node { | |
1530 protected: | |
1531 virtual uint hash() const; // Check the type | |
1532 virtual uint cmp( const Node &n ) const; | |
1533 virtual uint size_of() const; // Size is bigger | |
1534 const Type* const _type; | |
1535 public: | |
1536 void set_type(const Type* t) { | |
1537 assert(t != NULL, "sanity"); | |
1538 debug_only(uint check_hash = (VerifyHashTableKeys && _hash_lock) ? hash() : NO_HASH); | |
1539 *(const Type**)&_type = t; // cast away const-ness | |
1540 // If this node is in the hash table, make sure it doesn't need a rehash. | |
1541 assert(check_hash == NO_HASH || check_hash == hash(), "type change must preserve hash code"); | |
1542 } | |
1543 const Type* type() const { assert(_type != NULL, "sanity"); return _type; }; | |
1544 TypeNode( const Type *t, uint required ) : Node(required), _type(t) { | |
1545 init_class_id(Class_Type); | |
1546 } | |
1547 virtual const Type *Value( PhaseTransform *phase ) const; | |
1548 virtual const Type *bottom_type() const; | |
1549 virtual uint ideal_reg() const; | |
1550 #ifndef PRODUCT | |
1551 virtual void dump_spec(outputStream *st) const; | |
1552 #endif | |
1553 }; |