Mercurial > hg > truffle
annotate src/share/vm/opto/escape.cpp @ 67:16e1cb7cde24
6666343: Compile::has_loops not always set correctly
Summary: Compile::has_loops() should be set from inlined methods
Reviewed-by: kvn, rasbold
author | never |
---|---|
date | Tue, 18 Mar 2008 11:17:37 -0700 |
parents | 99269dbf4ba8 |
children | 36cd3cc4d27b a6cb86dd209b |
rev | line source |
---|---|
0 | 1 /* |
2 * Copyright 2005-2006 Sun Microsystems, Inc. All Rights Reserved. | |
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 #include "incls/_precompiled.incl" | |
26 #include "incls/_escape.cpp.incl" | |
27 | |
28 uint PointsToNode::edge_target(uint e) const { | |
29 assert(_edges != NULL && e < (uint)_edges->length(), "valid edge index"); | |
30 return (_edges->at(e) >> EdgeShift); | |
31 } | |
32 | |
33 PointsToNode::EdgeType PointsToNode::edge_type(uint e) const { | |
34 assert(_edges != NULL && e < (uint)_edges->length(), "valid edge index"); | |
35 return (EdgeType) (_edges->at(e) & EdgeMask); | |
36 } | |
37 | |
38 void PointsToNode::add_edge(uint targIdx, PointsToNode::EdgeType et) { | |
39 uint v = (targIdx << EdgeShift) + ((uint) et); | |
40 if (_edges == NULL) { | |
41 Arena *a = Compile::current()->comp_arena(); | |
42 _edges = new(a) GrowableArray<uint>(a, INITIAL_EDGE_COUNT, 0, 0); | |
43 } | |
44 _edges->append_if_missing(v); | |
45 } | |
46 | |
47 void PointsToNode::remove_edge(uint targIdx, PointsToNode::EdgeType et) { | |
48 uint v = (targIdx << EdgeShift) + ((uint) et); | |
49 | |
50 _edges->remove(v); | |
51 } | |
52 | |
53 #ifndef PRODUCT | |
54 static char *node_type_names[] = { | |
55 "UnknownType", | |
56 "JavaObject", | |
57 "LocalVar", | |
58 "Field" | |
59 }; | |
60 | |
61 static char *esc_names[] = { | |
62 "UnknownEscape", | |
65 | 63 "NoEscape", |
64 "ArgEscape", | |
65 "GlobalEscape" | |
0 | 66 }; |
67 | |
68 static char *edge_type_suffix[] = { | |
69 "?", // UnknownEdge | |
70 "P", // PointsToEdge | |
71 "D", // DeferredEdge | |
72 "F" // FieldEdge | |
73 }; | |
74 | |
75 void PointsToNode::dump() const { | |
76 NodeType nt = node_type(); | |
77 EscapeState es = escape_state(); | |
65 | 78 tty->print("%s %s %s [[", node_type_names[(int) nt], esc_names[(int) es], _scalar_replaceable ? "" : "NSR"); |
0 | 79 for (uint i = 0; i < edge_count(); i++) { |
80 tty->print(" %d%s", edge_target(i), edge_type_suffix[(int) edge_type(i)]); | |
81 } | |
82 tty->print("]] "); | |
83 if (_node == NULL) | |
84 tty->print_cr("<null>"); | |
85 else | |
86 _node->dump(); | |
87 } | |
88 #endif | |
89 | |
90 ConnectionGraph::ConnectionGraph(Compile * C) : _processed(C->comp_arena()), _node_map(C->comp_arena()) { | |
91 _collecting = true; | |
92 this->_compile = C; | |
93 const PointsToNode &dummy = PointsToNode(); | |
65 | 94 int sz = C->unique(); |
95 _nodes = new(C->comp_arena()) GrowableArray<PointsToNode>(C->comp_arena(), sz, sz, dummy); | |
0 | 96 _phantom_object = C->top()->_idx; |
97 PointsToNode *phn = ptnode_adr(_phantom_object); | |
65 | 98 phn->_node = C->top(); |
0 | 99 phn->set_node_type(PointsToNode::JavaObject); |
100 phn->set_escape_state(PointsToNode::GlobalEscape); | |
101 } | |
102 | |
103 void ConnectionGraph::add_pointsto_edge(uint from_i, uint to_i) { | |
104 PointsToNode *f = ptnode_adr(from_i); | |
105 PointsToNode *t = ptnode_adr(to_i); | |
106 | |
107 assert(f->node_type() != PointsToNode::UnknownType && t->node_type() != PointsToNode::UnknownType, "node types must be set"); | |
108 assert(f->node_type() == PointsToNode::LocalVar || f->node_type() == PointsToNode::Field, "invalid source of PointsTo edge"); | |
109 assert(t->node_type() == PointsToNode::JavaObject, "invalid destination of PointsTo edge"); | |
110 f->add_edge(to_i, PointsToNode::PointsToEdge); | |
111 } | |
112 | |
113 void ConnectionGraph::add_deferred_edge(uint from_i, uint to_i) { | |
114 PointsToNode *f = ptnode_adr(from_i); | |
115 PointsToNode *t = ptnode_adr(to_i); | |
116 | |
117 assert(f->node_type() != PointsToNode::UnknownType && t->node_type() != PointsToNode::UnknownType, "node types must be set"); | |
118 assert(f->node_type() == PointsToNode::LocalVar || f->node_type() == PointsToNode::Field, "invalid source of Deferred edge"); | |
119 assert(t->node_type() == PointsToNode::LocalVar || t->node_type() == PointsToNode::Field, "invalid destination of Deferred edge"); | |
120 // don't add a self-referential edge, this can occur during removal of | |
121 // deferred edges | |
122 if (from_i != to_i) | |
123 f->add_edge(to_i, PointsToNode::DeferredEdge); | |
124 } | |
125 | |
65 | 126 int ConnectionGraph::address_offset(Node* adr, PhaseTransform *phase) { |
127 const Type *adr_type = phase->type(adr); | |
128 if (adr->is_AddP() && adr_type->isa_oopptr() == NULL && | |
129 adr->in(AddPNode::Address)->is_Proj() && | |
130 adr->in(AddPNode::Address)->in(0)->is_Allocate()) { | |
131 // We are computing a raw address for a store captured by an Initialize | |
132 // compute an appropriate address type. AddP cases #3 and #5 (see below). | |
133 int offs = (int)phase->find_intptr_t_con(adr->in(AddPNode::Offset), Type::OffsetBot); | |
134 assert(offs != Type::OffsetBot || | |
135 adr->in(AddPNode::Address)->in(0)->is_AllocateArray(), | |
136 "offset must be a constant or it is initialization of array"); | |
137 return offs; | |
138 } | |
139 const TypePtr *t_ptr = adr_type->isa_ptr(); | |
0 | 140 assert(t_ptr != NULL, "must be a pointer type"); |
141 return t_ptr->offset(); | |
142 } | |
143 | |
144 void ConnectionGraph::add_field_edge(uint from_i, uint to_i, int offset) { | |
145 PointsToNode *f = ptnode_adr(from_i); | |
146 PointsToNode *t = ptnode_adr(to_i); | |
147 | |
148 assert(f->node_type() != PointsToNode::UnknownType && t->node_type() != PointsToNode::UnknownType, "node types must be set"); | |
149 assert(f->node_type() == PointsToNode::JavaObject, "invalid destination of Field edge"); | |
150 assert(t->node_type() == PointsToNode::Field, "invalid destination of Field edge"); | |
151 assert (t->offset() == -1 || t->offset() == offset, "conflicting field offsets"); | |
152 t->set_offset(offset); | |
153 | |
154 f->add_edge(to_i, PointsToNode::FieldEdge); | |
155 } | |
156 | |
157 void ConnectionGraph::set_escape_state(uint ni, PointsToNode::EscapeState es) { | |
158 PointsToNode *npt = ptnode_adr(ni); | |
159 PointsToNode::EscapeState old_es = npt->escape_state(); | |
160 if (es > old_es) | |
161 npt->set_escape_state(es); | |
162 } | |
163 | |
65 | 164 void ConnectionGraph::add_node(Node *n, PointsToNode::NodeType nt, |
165 PointsToNode::EscapeState es, bool done) { | |
166 PointsToNode* ptadr = ptnode_adr(n->_idx); | |
167 ptadr->_node = n; | |
168 ptadr->set_node_type(nt); | |
169 | |
170 // inline set_escape_state(idx, es); | |
171 PointsToNode::EscapeState old_es = ptadr->escape_state(); | |
172 if (es > old_es) | |
173 ptadr->set_escape_state(es); | |
174 | |
175 if (done) | |
176 _processed.set(n->_idx); | |
177 } | |
178 | |
0 | 179 PointsToNode::EscapeState ConnectionGraph::escape_state(Node *n, PhaseTransform *phase) { |
180 uint idx = n->_idx; | |
181 PointsToNode::EscapeState es; | |
182 | |
65 | 183 // If we are still collecting or there were no non-escaping allocations |
184 // we don't know the answer yet | |
185 if (_collecting || !_has_allocations) | |
0 | 186 return PointsToNode::UnknownEscape; |
187 | |
188 // if the node was created after the escape computation, return | |
189 // UnknownEscape | |
190 if (idx >= (uint)_nodes->length()) | |
191 return PointsToNode::UnknownEscape; | |
192 | |
193 es = _nodes->at_grow(idx).escape_state(); | |
194 | |
195 // if we have already computed a value, return it | |
196 if (es != PointsToNode::UnknownEscape) | |
197 return es; | |
198 | |
199 // compute max escape state of anything this node could point to | |
200 VectorSet ptset(Thread::current()->resource_area()); | |
201 PointsTo(ptset, n, phase); | |
65 | 202 for(VectorSetI i(&ptset); i.test() && es != PointsToNode::GlobalEscape; ++i) { |
0 | 203 uint pt = i.elem; |
65 | 204 PointsToNode::EscapeState pes = _nodes->adr_at(pt)->escape_state(); |
0 | 205 if (pes > es) |
206 es = pes; | |
207 } | |
208 // cache the computed escape state | |
209 assert(es != PointsToNode::UnknownEscape, "should have computed an escape state"); | |
210 _nodes->adr_at(idx)->set_escape_state(es); | |
211 return es; | |
212 } | |
213 | |
214 void ConnectionGraph::PointsTo(VectorSet &ptset, Node * n, PhaseTransform *phase) { | |
215 VectorSet visited(Thread::current()->resource_area()); | |
216 GrowableArray<uint> worklist; | |
217 | |
65 | 218 n = n->uncast(); |
0 | 219 PointsToNode npt = _nodes->at_grow(n->_idx); |
220 | |
221 // If we have a JavaObject, return just that object | |
222 if (npt.node_type() == PointsToNode::JavaObject) { | |
223 ptset.set(n->_idx); | |
224 return; | |
225 } | |
65 | 226 assert(npt._node != NULL, "unregistered node"); |
227 | |
0 | 228 worklist.push(n->_idx); |
229 while(worklist.length() > 0) { | |
230 int ni = worklist.pop(); | |
231 PointsToNode pn = _nodes->at_grow(ni); | |
65 | 232 if (!visited.test_set(ni)) { |
0 | 233 // ensure that all inputs of a Phi have been processed |
65 | 234 assert(!_collecting || !pn._node->is_Phi() || _processed.test(ni),""); |
0 | 235 |
236 int edges_processed = 0; | |
237 for (uint e = 0; e < pn.edge_count(); e++) { | |
65 | 238 uint etgt = pn.edge_target(e); |
0 | 239 PointsToNode::EdgeType et = pn.edge_type(e); |
240 if (et == PointsToNode::PointsToEdge) { | |
65 | 241 ptset.set(etgt); |
0 | 242 edges_processed++; |
243 } else if (et == PointsToNode::DeferredEdge) { | |
65 | 244 worklist.push(etgt); |
0 | 245 edges_processed++; |
65 | 246 } else { |
247 assert(false,"neither PointsToEdge or DeferredEdge"); | |
0 | 248 } |
249 } | |
250 if (edges_processed == 0) { | |
65 | 251 // no deferred or pointsto edges found. Assume the value was set |
252 // outside this method. Add the phantom object to the pointsto set. | |
0 | 253 ptset.set(_phantom_object); |
254 } | |
255 } | |
256 } | |
257 } | |
258 | |
259 void ConnectionGraph::remove_deferred(uint ni) { | |
260 VectorSet visited(Thread::current()->resource_area()); | |
261 | |
262 uint i = 0; | |
263 PointsToNode *ptn = ptnode_adr(ni); | |
264 | |
265 while(i < ptn->edge_count()) { | |
65 | 266 uint t = ptn->edge_target(i); |
267 PointsToNode *ptt = ptnode_adr(t); | |
0 | 268 if (ptn->edge_type(i) != PointsToNode::DeferredEdge) { |
269 i++; | |
270 } else { | |
271 ptn->remove_edge(t, PointsToNode::DeferredEdge); | |
65 | 272 if(!visited.test_set(t)) { |
0 | 273 for (uint j = 0; j < ptt->edge_count(); j++) { |
274 uint n1 = ptt->edge_target(j); | |
275 PointsToNode *pt1 = ptnode_adr(n1); | |
276 switch(ptt->edge_type(j)) { | |
277 case PointsToNode::PointsToEdge: | |
65 | 278 add_pointsto_edge(ni, n1); |
279 if(n1 == _phantom_object) { | |
280 // Special case - field set outside (globally escaping). | |
281 ptn->set_escape_state(PointsToNode::GlobalEscape); | |
282 } | |
0 | 283 break; |
284 case PointsToNode::DeferredEdge: | |
285 add_deferred_edge(ni, n1); | |
286 break; | |
287 case PointsToNode::FieldEdge: | |
288 assert(false, "invalid connection graph"); | |
289 break; | |
290 } | |
291 } | |
292 } | |
293 } | |
294 } | |
295 } | |
296 | |
297 | |
298 // Add an edge to node given by "to_i" from any field of adr_i whose offset | |
299 // matches "offset" A deferred edge is added if to_i is a LocalVar, and | |
300 // a pointsto edge is added if it is a JavaObject | |
301 | |
302 void ConnectionGraph::add_edge_from_fields(uint adr_i, uint to_i, int offs) { | |
303 PointsToNode an = _nodes->at_grow(adr_i); | |
304 PointsToNode to = _nodes->at_grow(to_i); | |
305 bool deferred = (to.node_type() == PointsToNode::LocalVar); | |
306 | |
307 for (uint fe = 0; fe < an.edge_count(); fe++) { | |
308 assert(an.edge_type(fe) == PointsToNode::FieldEdge, "expecting a field edge"); | |
309 int fi = an.edge_target(fe); | |
310 PointsToNode pf = _nodes->at_grow(fi); | |
311 int po = pf.offset(); | |
312 if (po == offs || po == Type::OffsetBot || offs == Type::OffsetBot) { | |
313 if (deferred) | |
314 add_deferred_edge(fi, to_i); | |
315 else | |
316 add_pointsto_edge(fi, to_i); | |
317 } | |
318 } | |
319 } | |
320 | |
65 | 321 // Add a deferred edge from node given by "from_i" to any field of adr_i |
322 // whose offset matches "offset". | |
0 | 323 void ConnectionGraph::add_deferred_edge_to_fields(uint from_i, uint adr_i, int offs) { |
324 PointsToNode an = _nodes->at_grow(adr_i); | |
325 for (uint fe = 0; fe < an.edge_count(); fe++) { | |
326 assert(an.edge_type(fe) == PointsToNode::FieldEdge, "expecting a field edge"); | |
327 int fi = an.edge_target(fe); | |
328 PointsToNode pf = _nodes->at_grow(fi); | |
329 int po = pf.offset(); | |
330 if (pf.edge_count() == 0) { | |
331 // we have not seen any stores to this field, assume it was set outside this method | |
332 add_pointsto_edge(fi, _phantom_object); | |
333 } | |
334 if (po == offs || po == Type::OffsetBot || offs == Type::OffsetBot) { | |
335 add_deferred_edge(from_i, fi); | |
336 } | |
337 } | |
338 } | |
339 | |
65 | 340 // Helper functions |
341 | |
342 static Node* get_addp_base(Node *addp) { | |
343 assert(addp->is_AddP(), "must be AddP"); | |
344 // | |
345 // AddP cases for Base and Address inputs: | |
346 // case #1. Direct object's field reference: | |
347 // Allocate | |
348 // | | |
349 // Proj #5 ( oop result ) | |
350 // | | |
351 // CheckCastPP (cast to instance type) | |
352 // | | | |
353 // AddP ( base == address ) | |
354 // | |
355 // case #2. Indirect object's field reference: | |
356 // Phi | |
357 // | | |
358 // CastPP (cast to instance type) | |
359 // | | | |
360 // AddP ( base == address ) | |
361 // | |
362 // case #3. Raw object's field reference for Initialize node: | |
363 // Allocate | |
364 // | | |
365 // Proj #5 ( oop result ) | |
366 // top | | |
367 // \ | | |
368 // AddP ( base == top ) | |
369 // | |
370 // case #4. Array's element reference: | |
371 // {CheckCastPP | CastPP} | |
372 // | | | | |
373 // | AddP ( array's element offset ) | |
374 // | | | |
375 // AddP ( array's offset ) | |
376 // | |
377 // case #5. Raw object's field reference for arraycopy stub call: | |
378 // The inline_native_clone() case when the arraycopy stub is called | |
379 // after the allocation before Initialize and CheckCastPP nodes. | |
380 // Allocate | |
381 // | | |
382 // Proj #5 ( oop result ) | |
383 // | | | |
384 // AddP ( base == address ) | |
385 // | |
386 // case #6. Constant Pool or ThreadLocal or Raw object's field reference: | |
387 // ConP # Object from Constant Pool. | |
388 // top | | |
389 // \ | | |
390 // AddP ( base == top ) | |
391 // | |
392 Node *base = addp->in(AddPNode::Base)->uncast(); | |
393 if (base->is_top()) { // The AddP case #3 and #6. | |
394 base = addp->in(AddPNode::Address)->uncast(); | |
395 assert(base->Opcode() == Op_ConP || base->Opcode() == Op_ThreadLocal || | |
396 base->is_Mem() && base->bottom_type() == TypeRawPtr::NOTNULL || | |
397 base->is_Proj() && base->in(0)->is_Allocate(), "sanity"); | |
0 | 398 } |
65 | 399 return base; |
400 } | |
401 | |
402 static Node* find_second_addp(Node* addp, Node* n) { | |
403 assert(addp->is_AddP() && addp->outcnt() > 0, "Don't process dead nodes"); | |
404 | |
405 Node* addp2 = addp->raw_out(0); | |
406 if (addp->outcnt() == 1 && addp2->is_AddP() && | |
407 addp2->in(AddPNode::Base) == n && | |
408 addp2->in(AddPNode::Address) == addp) { | |
409 | |
410 assert(addp->in(AddPNode::Base) == n, "expecting the same base"); | |
411 // | |
412 // Find array's offset to push it on worklist first and | |
413 // as result process an array's element offset first (pushed second) | |
414 // to avoid CastPP for the array's offset. | |
415 // Otherwise the inserted CastPP (LocalVar) will point to what | |
416 // the AddP (Field) points to. Which would be wrong since | |
417 // the algorithm expects the CastPP has the same point as | |
418 // as AddP's base CheckCastPP (LocalVar). | |
419 // | |
420 // ArrayAllocation | |
421 // | | |
422 // CheckCastPP | |
423 // | | |
424 // memProj (from ArrayAllocation CheckCastPP) | |
425 // | || | |
426 // | || Int (element index) | |
427 // | || | ConI (log(element size)) | |
428 // | || | / | |
429 // | || LShift | |
430 // | || / | |
431 // | AddP (array's element offset) | |
432 // | | | |
433 // | | ConI (array's offset: #12(32-bits) or #24(64-bits)) | |
434 // | / / | |
435 // AddP (array's offset) | |
436 // | | |
437 // Load/Store (memory operation on array's element) | |
438 // | |
439 return addp2; | |
440 } | |
441 return NULL; | |
0 | 442 } |
443 | |
444 // | |
445 // Adjust the type and inputs of an AddP which computes the | |
446 // address of a field of an instance | |
447 // | |
448 void ConnectionGraph::split_AddP(Node *addp, Node *base, PhaseGVN *igvn) { | |
65 | 449 const TypeOopPtr *base_t = igvn->type(base)->isa_oopptr(); |
450 assert(base_t != NULL && base_t->is_instance(), "expecting instance oopptr"); | |
0 | 451 const TypeOopPtr *t = igvn->type(addp)->isa_oopptr(); |
65 | 452 if (t == NULL) { |
453 // We are computing a raw address for a store captured by an Initialize | |
454 // compute an appropriate address type. | |
455 assert(igvn->type(addp) == TypeRawPtr::NOTNULL, "must be raw pointer"); | |
456 assert(addp->in(AddPNode::Address)->is_Proj(), "base of raw address must be result projection from allocation"); | |
457 int offs = (int)igvn->find_intptr_t_con(addp->in(AddPNode::Offset), Type::OffsetBot); | |
458 assert(offs != Type::OffsetBot, "offset must be a constant"); | |
459 t = base_t->add_offset(offs)->is_oopptr(); | |
460 } | |
0 | 461 uint inst_id = base_t->instance_id(); |
462 assert(!t->is_instance() || t->instance_id() == inst_id, | |
463 "old type must be non-instance or match new type"); | |
464 const TypeOopPtr *tinst = base_t->add_offset(t->offset())->is_oopptr(); | |
65 | 465 // Do NOT remove the next call: ensure an new alias index is allocated |
466 // for the instance type | |
0 | 467 int alias_idx = _compile->get_alias_index(tinst); |
468 igvn->set_type(addp, tinst); | |
469 // record the allocation in the node map | |
470 set_map(addp->_idx, get_map(base->_idx)); | |
65 | 471 // if the Address input is not the appropriate instance type |
472 // (due to intervening casts,) insert a cast | |
0 | 473 Node *adr = addp->in(AddPNode::Address); |
474 const TypeOopPtr *atype = igvn->type(adr)->isa_oopptr(); | |
65 | 475 if (atype != NULL && atype->instance_id() != inst_id) { |
0 | 476 assert(!atype->is_instance(), "no conflicting instances"); |
477 const TypeOopPtr *new_atype = base_t->add_offset(atype->offset())->isa_oopptr(); | |
478 Node *acast = new (_compile, 2) CastPPNode(adr, new_atype); | |
479 acast->set_req(0, adr->in(0)); | |
480 igvn->set_type(acast, new_atype); | |
481 record_for_optimizer(acast); | |
482 Node *bcast = acast; | |
483 Node *abase = addp->in(AddPNode::Base); | |
484 if (abase != adr) { | |
485 bcast = new (_compile, 2) CastPPNode(abase, base_t); | |
486 bcast->set_req(0, abase->in(0)); | |
487 igvn->set_type(bcast, base_t); | |
488 record_for_optimizer(bcast); | |
489 } | |
490 igvn->hash_delete(addp); | |
491 addp->set_req(AddPNode::Base, bcast); | |
492 addp->set_req(AddPNode::Address, acast); | |
493 igvn->hash_insert(addp); | |
494 } | |
65 | 495 // Put on IGVN worklist since at least addp's type was changed above. |
496 record_for_optimizer(addp); | |
0 | 497 } |
498 | |
499 // | |
500 // Create a new version of orig_phi if necessary. Returns either the newly | |
501 // created phi or an existing phi. Sets create_new to indicate wheter a new | |
502 // phi was created. Cache the last newly created phi in the node map. | |
503 // | |
504 PhiNode *ConnectionGraph::create_split_phi(PhiNode *orig_phi, int alias_idx, GrowableArray<PhiNode *> &orig_phi_worklist, PhaseGVN *igvn, bool &new_created) { | |
505 Compile *C = _compile; | |
506 new_created = false; | |
507 int phi_alias_idx = C->get_alias_index(orig_phi->adr_type()); | |
508 // nothing to do if orig_phi is bottom memory or matches alias_idx | |
65 | 509 if (phi_alias_idx == alias_idx) { |
0 | 510 return orig_phi; |
511 } | |
512 // have we already created a Phi for this alias index? | |
513 PhiNode *result = get_map_phi(orig_phi->_idx); | |
514 if (result != NULL && C->get_alias_index(result->adr_type()) == alias_idx) { | |
515 return result; | |
516 } | |
38
b789bcaf2dd9
6667610: (Escape Analysis) retry compilation without EA if it fails
kvn
parents:
0
diff
changeset
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517 if ((int)C->unique() + 2*NodeLimitFudgeFactor > MaxNodeLimit) { |
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518 if (C->do_escape_analysis() == true && !C->failing()) { |
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519 // Retry compilation without escape analysis. |
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520 // If this is the first failure, the sentinel string will "stick" |
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521 // to the Compile object, and the C2Compiler will see it and retry. |
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522 C->record_failure(C2Compiler::retry_no_escape_analysis()); |
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523 } |
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524 return NULL; |
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525 } |
0 | 526 orig_phi_worklist.append_if_missing(orig_phi); |
65 | 527 const TypePtr *atype = C->get_adr_type(alias_idx); |
0 | 528 result = PhiNode::make(orig_phi->in(0), NULL, Type::MEMORY, atype); |
529 set_map_phi(orig_phi->_idx, result); | |
530 igvn->set_type(result, result->bottom_type()); | |
531 record_for_optimizer(result); | |
532 new_created = true; | |
533 return result; | |
534 } | |
535 | |
536 // | |
537 // Return a new version of Memory Phi "orig_phi" with the inputs having the | |
538 // specified alias index. | |
539 // | |
540 PhiNode *ConnectionGraph::split_memory_phi(PhiNode *orig_phi, int alias_idx, GrowableArray<PhiNode *> &orig_phi_worklist, PhaseGVN *igvn) { | |
541 | |
542 assert(alias_idx != Compile::AliasIdxBot, "can't split out bottom memory"); | |
543 Compile *C = _compile; | |
544 bool new_phi_created; | |
65 | 545 PhiNode *result = create_split_phi(orig_phi, alias_idx, orig_phi_worklist, igvn, new_phi_created); |
0 | 546 if (!new_phi_created) { |
547 return result; | |
548 } | |
549 | |
550 GrowableArray<PhiNode *> phi_list; | |
551 GrowableArray<uint> cur_input; | |
552 | |
553 PhiNode *phi = orig_phi; | |
554 uint idx = 1; | |
555 bool finished = false; | |
556 while(!finished) { | |
557 while (idx < phi->req()) { | |
65 | 558 Node *mem = find_inst_mem(phi->in(idx), alias_idx, orig_phi_worklist, igvn); |
0 | 559 if (mem != NULL && mem->is_Phi()) { |
65 | 560 PhiNode *newphi = create_split_phi(mem->as_Phi(), alias_idx, orig_phi_worklist, igvn, new_phi_created); |
0 | 561 if (new_phi_created) { |
562 // found an phi for which we created a new split, push current one on worklist and begin | |
563 // processing new one | |
564 phi_list.push(phi); | |
565 cur_input.push(idx); | |
566 phi = mem->as_Phi(); | |
65 | 567 result = newphi; |
0 | 568 idx = 1; |
569 continue; | |
570 } else { | |
65 | 571 mem = newphi; |
0 | 572 } |
573 } | |
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574 if (C->failing()) { |
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575 return NULL; |
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576 } |
0 | 577 result->set_req(idx++, mem); |
578 } | |
579 #ifdef ASSERT | |
580 // verify that the new Phi has an input for each input of the original | |
581 assert( phi->req() == result->req(), "must have same number of inputs."); | |
582 assert( result->in(0) != NULL && result->in(0) == phi->in(0), "regions must match"); | |
65 | 583 #endif |
584 // Check if all new phi's inputs have specified alias index. | |
585 // Otherwise use old phi. | |
0 | 586 for (uint i = 1; i < phi->req(); i++) { |
65 | 587 Node* in = result->in(i); |
588 assert((phi->in(i) == NULL) == (in == NULL), "inputs must correspond."); | |
0 | 589 } |
590 // we have finished processing a Phi, see if there are any more to do | |
591 finished = (phi_list.length() == 0 ); | |
592 if (!finished) { | |
593 phi = phi_list.pop(); | |
594 idx = cur_input.pop(); | |
65 | 595 PhiNode *prev_result = get_map_phi(phi->_idx); |
596 prev_result->set_req(idx++, result); | |
597 result = prev_result; | |
0 | 598 } |
599 } | |
600 return result; | |
601 } | |
602 | |
65 | 603 |
604 // | |
605 // The next methods are derived from methods in MemNode. | |
606 // | |
607 static Node *step_through_mergemem(MergeMemNode *mmem, int alias_idx, const TypeOopPtr *tinst) { | |
608 Node *mem = mmem; | |
609 // TypeInstPtr::NOTNULL+any is an OOP with unknown offset - generally | |
610 // means an array I have not precisely typed yet. Do not do any | |
611 // alias stuff with it any time soon. | |
612 if( tinst->base() != Type::AnyPtr && | |
613 !(tinst->klass()->is_java_lang_Object() && | |
614 tinst->offset() == Type::OffsetBot) ) { | |
615 mem = mmem->memory_at(alias_idx); | |
616 // Update input if it is progress over what we have now | |
617 } | |
618 return mem; | |
619 } | |
620 | |
621 // | |
622 // Search memory chain of "mem" to find a MemNode whose address | |
623 // is the specified alias index. | |
624 // | |
625 Node* ConnectionGraph::find_inst_mem(Node *orig_mem, int alias_idx, GrowableArray<PhiNode *> &orig_phis, PhaseGVN *phase) { | |
626 if (orig_mem == NULL) | |
627 return orig_mem; | |
628 Compile* C = phase->C; | |
629 const TypeOopPtr *tinst = C->get_adr_type(alias_idx)->isa_oopptr(); | |
630 bool is_instance = (tinst != NULL) && tinst->is_instance(); | |
631 Node *prev = NULL; | |
632 Node *result = orig_mem; | |
633 while (prev != result) { | |
634 prev = result; | |
635 if (result->is_Mem()) { | |
636 MemNode *mem = result->as_Mem(); | |
637 const Type *at = phase->type(mem->in(MemNode::Address)); | |
638 if (at != Type::TOP) { | |
639 assert (at->isa_ptr() != NULL, "pointer type required."); | |
640 int idx = C->get_alias_index(at->is_ptr()); | |
641 if (idx == alias_idx) | |
642 break; | |
643 } | |
644 result = mem->in(MemNode::Memory); | |
645 } | |
646 if (!is_instance) | |
647 continue; // don't search further for non-instance types | |
648 // skip over a call which does not affect this memory slice | |
649 if (result->is_Proj() && result->as_Proj()->_con == TypeFunc::Memory) { | |
650 Node *proj_in = result->in(0); | |
651 if (proj_in->is_Call()) { | |
652 CallNode *call = proj_in->as_Call(); | |
653 if (!call->may_modify(tinst, phase)) { | |
654 result = call->in(TypeFunc::Memory); | |
655 } | |
656 } else if (proj_in->is_Initialize()) { | |
657 AllocateNode* alloc = proj_in->as_Initialize()->allocation(); | |
658 // Stop if this is the initialization for the object instance which | |
659 // which contains this memory slice, otherwise skip over it. | |
660 if (alloc == NULL || alloc->_idx != tinst->instance_id()) { | |
661 result = proj_in->in(TypeFunc::Memory); | |
662 } | |
663 } else if (proj_in->is_MemBar()) { | |
664 result = proj_in->in(TypeFunc::Memory); | |
665 } | |
666 } else if (result->is_MergeMem()) { | |
667 MergeMemNode *mmem = result->as_MergeMem(); | |
668 result = step_through_mergemem(mmem, alias_idx, tinst); | |
669 if (result == mmem->base_memory()) { | |
670 // Didn't find instance memory, search through general slice recursively. | |
671 result = mmem->memory_at(C->get_general_index(alias_idx)); | |
672 result = find_inst_mem(result, alias_idx, orig_phis, phase); | |
673 if (C->failing()) { | |
674 return NULL; | |
675 } | |
676 mmem->set_memory_at(alias_idx, result); | |
677 } | |
678 } else if (result->is_Phi() && | |
679 C->get_alias_index(result->as_Phi()->adr_type()) != alias_idx) { | |
680 Node *un = result->as_Phi()->unique_input(phase); | |
681 if (un != NULL) { | |
682 result = un; | |
683 } else { | |
684 break; | |
685 } | |
686 } | |
687 } | |
688 if (is_instance && result->is_Phi()) { | |
689 PhiNode *mphi = result->as_Phi(); | |
690 assert(mphi->bottom_type() == Type::MEMORY, "memory phi required"); | |
691 const TypePtr *t = mphi->adr_type(); | |
692 if (C->get_alias_index(t) != alias_idx) { | |
693 result = split_memory_phi(mphi, alias_idx, orig_phis, phase); | |
694 } | |
695 } | |
696 // the result is either MemNode, PhiNode, InitializeNode. | |
697 return result; | |
698 } | |
699 | |
700 | |
0 | 701 // |
702 // Convert the types of unescaped object to instance types where possible, | |
703 // propagate the new type information through the graph, and update memory | |
704 // edges and MergeMem inputs to reflect the new type. | |
705 // | |
706 // We start with allocations (and calls which may be allocations) on alloc_worklist. | |
707 // The processing is done in 4 phases: | |
708 // | |
709 // Phase 1: Process possible allocations from alloc_worklist. Create instance | |
710 // types for the CheckCastPP for allocations where possible. | |
711 // Propagate the the new types through users as follows: | |
712 // casts and Phi: push users on alloc_worklist | |
713 // AddP: cast Base and Address inputs to the instance type | |
714 // push any AddP users on alloc_worklist and push any memnode | |
715 // users onto memnode_worklist. | |
716 // Phase 2: Process MemNode's from memnode_worklist. compute new address type and | |
717 // search the Memory chain for a store with the appropriate type | |
718 // address type. If a Phi is found, create a new version with | |
719 // the approriate memory slices from each of the Phi inputs. | |
720 // For stores, process the users as follows: | |
721 // MemNode: push on memnode_worklist | |
722 // MergeMem: push on mergemem_worklist | |
723 // Phase 3: Process MergeMem nodes from mergemem_worklist. Walk each memory slice | |
724 // moving the first node encountered of each instance type to the | |
725 // the input corresponding to its alias index. | |
726 // appropriate memory slice. | |
727 // Phase 4: Update the inputs of non-instance memory Phis and the Memory input of memnodes. | |
728 // | |
729 // In the following example, the CheckCastPP nodes are the cast of allocation | |
730 // results and the allocation of node 29 is unescaped and eligible to be an | |
731 // instance type. | |
732 // | |
733 // We start with: | |
734 // | |
735 // 7 Parm #memory | |
736 // 10 ConI "12" | |
737 // 19 CheckCastPP "Foo" | |
738 // 20 AddP _ 19 19 10 Foo+12 alias_index=4 | |
739 // 29 CheckCastPP "Foo" | |
740 // 30 AddP _ 29 29 10 Foo+12 alias_index=4 | |
741 // | |
742 // 40 StoreP 25 7 20 ... alias_index=4 | |
743 // 50 StoreP 35 40 30 ... alias_index=4 | |
744 // 60 StoreP 45 50 20 ... alias_index=4 | |
745 // 70 LoadP _ 60 30 ... alias_index=4 | |
746 // 80 Phi 75 50 60 Memory alias_index=4 | |
747 // 90 LoadP _ 80 30 ... alias_index=4 | |
748 // 100 LoadP _ 80 20 ... alias_index=4 | |
749 // | |
750 // | |
751 // Phase 1 creates an instance type for node 29 assigning it an instance id of 24 | |
752 // and creating a new alias index for node 30. This gives: | |
753 // | |
754 // 7 Parm #memory | |
755 // 10 ConI "12" | |
756 // 19 CheckCastPP "Foo" | |
757 // 20 AddP _ 19 19 10 Foo+12 alias_index=4 | |
758 // 29 CheckCastPP "Foo" iid=24 | |
759 // 30 AddP _ 29 29 10 Foo+12 alias_index=6 iid=24 | |
760 // | |
761 // 40 StoreP 25 7 20 ... alias_index=4 | |
762 // 50 StoreP 35 40 30 ... alias_index=6 | |
763 // 60 StoreP 45 50 20 ... alias_index=4 | |
764 // 70 LoadP _ 60 30 ... alias_index=6 | |
765 // 80 Phi 75 50 60 Memory alias_index=4 | |
766 // 90 LoadP _ 80 30 ... alias_index=6 | |
767 // 100 LoadP _ 80 20 ... alias_index=4 | |
768 // | |
769 // In phase 2, new memory inputs are computed for the loads and stores, | |
770 // And a new version of the phi is created. In phase 4, the inputs to | |
771 // node 80 are updated and then the memory nodes are updated with the | |
772 // values computed in phase 2. This results in: | |
773 // | |
774 // 7 Parm #memory | |
775 // 10 ConI "12" | |
776 // 19 CheckCastPP "Foo" | |
777 // 20 AddP _ 19 19 10 Foo+12 alias_index=4 | |
778 // 29 CheckCastPP "Foo" iid=24 | |
779 // 30 AddP _ 29 29 10 Foo+12 alias_index=6 iid=24 | |
780 // | |
781 // 40 StoreP 25 7 20 ... alias_index=4 | |
782 // 50 StoreP 35 7 30 ... alias_index=6 | |
783 // 60 StoreP 45 40 20 ... alias_index=4 | |
784 // 70 LoadP _ 50 30 ... alias_index=6 | |
785 // 80 Phi 75 40 60 Memory alias_index=4 | |
786 // 120 Phi 75 50 50 Memory alias_index=6 | |
787 // 90 LoadP _ 120 30 ... alias_index=6 | |
788 // 100 LoadP _ 80 20 ... alias_index=4 | |
789 // | |
790 void ConnectionGraph::split_unique_types(GrowableArray<Node *> &alloc_worklist) { | |
791 GrowableArray<Node *> memnode_worklist; | |
792 GrowableArray<Node *> mergemem_worklist; | |
793 GrowableArray<PhiNode *> orig_phis; | |
794 PhaseGVN *igvn = _compile->initial_gvn(); | |
795 uint new_index_start = (uint) _compile->num_alias_types(); | |
796 VectorSet visited(Thread::current()->resource_area()); | |
797 VectorSet ptset(Thread::current()->resource_area()); | |
798 | |
65 | 799 |
800 // Phase 1: Process possible allocations from alloc_worklist. | |
801 // Create instance types for the CheckCastPP for allocations where possible. | |
0 | 802 while (alloc_worklist.length() != 0) { |
803 Node *n = alloc_worklist.pop(); | |
804 uint ni = n->_idx; | |
65 | 805 const TypeOopPtr* tinst = NULL; |
0 | 806 if (n->is_Call()) { |
807 CallNode *alloc = n->as_Call(); | |
808 // copy escape information to call node | |
65 | 809 PointsToNode* ptn = _nodes->adr_at(alloc->_idx); |
0 | 810 PointsToNode::EscapeState es = escape_state(alloc, igvn); |
65 | 811 // We have an allocation or call which returns a Java object, |
812 // see if it is unescaped. | |
813 if (es != PointsToNode::NoEscape || !ptn->_scalar_replaceable) | |
0 | 814 continue; |
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815 if (alloc->is_Allocate()) { |
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816 // Set the scalar_replaceable flag before the next check. |
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817 alloc->as_Allocate()->_is_scalar_replaceable = true; |
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818 } |
65 | 819 // find CheckCastPP of call return value |
820 n = alloc->result_cast(); | |
821 if (n == NULL || // No uses accept Initialize or | |
822 !n->is_CheckCastPP()) // not unique CheckCastPP. | |
823 continue; | |
824 // The inline code for Object.clone() casts the allocation result to | |
825 // java.lang.Object and then to the the actual type of the allocated | |
826 // object. Detect this case and use the second cast. | |
827 if (alloc->is_Allocate() && n->as_Type()->type() == TypeInstPtr::NOTNULL | |
828 && igvn->type(alloc->in(AllocateNode::KlassNode)) != TypeKlassPtr::OBJECT) { | |
829 Node *cast2 = NULL; | |
830 for (DUIterator_Fast imax, i = n->fast_outs(imax); i < imax; i++) { | |
831 Node *use = n->fast_out(i); | |
832 if (use->is_CheckCastPP()) { | |
833 cast2 = use; | |
834 break; | |
835 } | |
836 } | |
837 if (cast2 != NULL) { | |
838 n = cast2; | |
839 } else { | |
840 continue; | |
841 } | |
842 } | |
843 set_escape_state(n->_idx, es); | |
844 // in order for an object to be stackallocatable, it must be: | |
845 // - a direct allocation (not a call returning an object) | |
846 // - non-escaping | |
847 // - eligible to be a unique type | |
848 // - not determined to be ineligible by escape analysis | |
0 | 849 set_map(alloc->_idx, n); |
850 set_map(n->_idx, alloc); | |
65 | 851 const TypeOopPtr *t = igvn->type(n)->isa_oopptr(); |
852 if (t == NULL) | |
0 | 853 continue; // not a TypeInstPtr |
65 | 854 tinst = t->cast_to_instance(ni); |
0 | 855 igvn->hash_delete(n); |
856 igvn->set_type(n, tinst); | |
857 n->raise_bottom_type(tinst); | |
858 igvn->hash_insert(n); | |
65 | 859 record_for_optimizer(n); |
860 if (alloc->is_Allocate() && ptn->_scalar_replaceable && | |
861 (t->isa_instptr() || t->isa_aryptr())) { | |
862 // An allocation may have an Initialize which has raw stores. Scan | |
863 // the users of the raw allocation result and push AddP users | |
864 // on alloc_worklist. | |
865 Node *raw_result = alloc->proj_out(TypeFunc::Parms); | |
866 assert (raw_result != NULL, "must have an allocation result"); | |
867 for (DUIterator_Fast imax, i = raw_result->fast_outs(imax); i < imax; i++) { | |
868 Node *use = raw_result->fast_out(i); | |
869 if (use->is_AddP() && use->outcnt() > 0) { // Don't process dead nodes | |
870 Node* addp2 = find_second_addp(use, raw_result); | |
871 if (addp2 != NULL) { | |
872 assert(alloc->is_AllocateArray(),"array allocation was expected"); | |
873 alloc_worklist.append_if_missing(addp2); | |
874 } | |
875 alloc_worklist.append_if_missing(use); | |
876 } else if (use->is_Initialize()) { | |
877 memnode_worklist.append_if_missing(use); | |
878 } | |
879 } | |
880 } | |
0 | 881 } else if (n->is_AddP()) { |
882 ptset.Clear(); | |
65 | 883 PointsTo(ptset, get_addp_base(n), igvn); |
0 | 884 assert(ptset.Size() == 1, "AddP address is unique"); |
65 | 885 uint elem = ptset.getelem(); // Allocation node's index |
886 if (elem == _phantom_object) | |
887 continue; // Assume the value was set outside this method. | |
888 Node *base = get_map(elem); // CheckCastPP node | |
0 | 889 split_AddP(n, base, igvn); |
65 | 890 tinst = igvn->type(base)->isa_oopptr(); |
891 } else if (n->is_Phi() || | |
892 n->is_CheckCastPP() || | |
893 (n->is_ConstraintCast() && n->Opcode() == Op_CastPP)) { | |
0 | 894 if (visited.test_set(n->_idx)) { |
895 assert(n->is_Phi(), "loops only through Phi's"); | |
896 continue; // already processed | |
897 } | |
898 ptset.Clear(); | |
899 PointsTo(ptset, n, igvn); | |
900 if (ptset.Size() == 1) { | |
65 | 901 uint elem = ptset.getelem(); // Allocation node's index |
902 if (elem == _phantom_object) | |
903 continue; // Assume the value was set outside this method. | |
904 Node *val = get_map(elem); // CheckCastPP node | |
0 | 905 TypeNode *tn = n->as_Type(); |
65 | 906 tinst = igvn->type(val)->isa_oopptr(); |
907 assert(tinst != NULL && tinst->is_instance() && | |
908 tinst->instance_id() == elem , "instance type expected."); | |
909 const TypeOopPtr *tn_t = igvn->type(tn)->isa_oopptr(); | |
0 | 910 |
65 | 911 if (tn_t != NULL && |
912 tinst->cast_to_instance(TypeOopPtr::UNKNOWN_INSTANCE)->higher_equal(tn_t)) { | |
0 | 913 igvn->hash_delete(tn); |
65 | 914 igvn->set_type(tn, tinst); |
915 tn->set_type(tinst); | |
0 | 916 igvn->hash_insert(tn); |
65 | 917 record_for_optimizer(n); |
0 | 918 } |
919 } | |
920 } else { | |
921 continue; | |
922 } | |
923 // push users on appropriate worklist | |
924 for (DUIterator_Fast imax, i = n->fast_outs(imax); i < imax; i++) { | |
925 Node *use = n->fast_out(i); | |
926 if(use->is_Mem() && use->in(MemNode::Address) == n) { | |
65 | 927 memnode_worklist.append_if_missing(use); |
928 } else if (use->is_Initialize()) { | |
929 memnode_worklist.append_if_missing(use); | |
930 } else if (use->is_MergeMem()) { | |
931 mergemem_worklist.append_if_missing(use); | |
932 } else if (use->is_Call() && tinst != NULL) { | |
933 // Look for MergeMem nodes for calls which reference unique allocation | |
934 // (through CheckCastPP nodes) even for debug info. | |
935 Node* m = use->in(TypeFunc::Memory); | |
936 uint iid = tinst->instance_id(); | |
937 while (m->is_Proj() && m->in(0)->is_Call() && | |
938 m->in(0) != use && !m->in(0)->_idx != iid) { | |
939 m = m->in(0)->in(TypeFunc::Memory); | |
940 } | |
941 if (m->is_MergeMem()) { | |
942 mergemem_worklist.append_if_missing(m); | |
943 } | |
944 } else if (use->is_AddP() && use->outcnt() > 0) { // No dead nodes | |
945 Node* addp2 = find_second_addp(use, n); | |
946 if (addp2 != NULL) { | |
947 alloc_worklist.append_if_missing(addp2); | |
948 } | |
949 alloc_worklist.append_if_missing(use); | |
950 } else if (use->is_Phi() || | |
951 use->is_CheckCastPP() || | |
952 (use->is_ConstraintCast() && use->Opcode() == Op_CastPP)) { | |
953 alloc_worklist.append_if_missing(use); | |
0 | 954 } |
955 } | |
956 | |
957 } | |
65 | 958 // New alias types were created in split_AddP(). |
0 | 959 uint new_index_end = (uint) _compile->num_alias_types(); |
960 | |
961 // Phase 2: Process MemNode's from memnode_worklist. compute new address type and | |
962 // compute new values for Memory inputs (the Memory inputs are not | |
963 // actually updated until phase 4.) | |
964 if (memnode_worklist.length() == 0) | |
965 return; // nothing to do | |
966 | |
967 while (memnode_worklist.length() != 0) { | |
968 Node *n = memnode_worklist.pop(); | |
65 | 969 if (visited.test_set(n->_idx)) |
970 continue; | |
0 | 971 if (n->is_Phi()) { |
972 assert(n->as_Phi()->adr_type() != TypePtr::BOTTOM, "narrow memory slice required"); | |
973 // we don't need to do anything, but the users must be pushed if we haven't processed | |
974 // this Phi before | |
65 | 975 } else if (n->is_Initialize()) { |
976 // we don't need to do anything, but the users of the memory projection must be pushed | |
977 n = n->as_Initialize()->proj_out(TypeFunc::Memory); | |
978 if (n == NULL) | |
0 | 979 continue; |
980 } else { | |
981 assert(n->is_Mem(), "memory node required."); | |
982 Node *addr = n->in(MemNode::Address); | |
65 | 983 assert(addr->is_AddP(), "AddP required"); |
0 | 984 const Type *addr_t = igvn->type(addr); |
985 if (addr_t == Type::TOP) | |
986 continue; | |
987 assert (addr_t->isa_ptr() != NULL, "pointer type required."); | |
988 int alias_idx = _compile->get_alias_index(addr_t->is_ptr()); | |
65 | 989 assert ((uint)alias_idx < new_index_end, "wrong alias index"); |
990 Node *mem = find_inst_mem(n->in(MemNode::Memory), alias_idx, orig_phis, igvn); | |
38
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991 if (_compile->failing()) { |
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992 return; |
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993 } |
65 | 994 if (mem != n->in(MemNode::Memory)) { |
0 | 995 set_map(n->_idx, mem); |
65 | 996 _nodes->adr_at(n->_idx)->_node = n; |
997 } | |
0 | 998 if (n->is_Load()) { |
999 continue; // don't push users | |
1000 } else if (n->is_LoadStore()) { | |
1001 // get the memory projection | |
1002 for (DUIterator_Fast imax, i = n->fast_outs(imax); i < imax; i++) { | |
1003 Node *use = n->fast_out(i); | |
1004 if (use->Opcode() == Op_SCMemProj) { | |
1005 n = use; | |
1006 break; | |
1007 } | |
1008 } | |
1009 assert(n->Opcode() == Op_SCMemProj, "memory projection required"); | |
1010 } | |
1011 } | |
1012 // push user on appropriate worklist | |
1013 for (DUIterator_Fast imax, i = n->fast_outs(imax); i < imax; i++) { | |
1014 Node *use = n->fast_out(i); | |
1015 if (use->is_Phi()) { | |
65 | 1016 memnode_worklist.append_if_missing(use); |
0 | 1017 } else if(use->is_Mem() && use->in(MemNode::Memory) == n) { |
65 | 1018 memnode_worklist.append_if_missing(use); |
1019 } else if (use->is_Initialize()) { | |
1020 memnode_worklist.append_if_missing(use); | |
0 | 1021 } else if (use->is_MergeMem()) { |
65 | 1022 mergemem_worklist.append_if_missing(use); |
0 | 1023 } |
1024 } | |
1025 } | |
1026 | |
65 | 1027 // Phase 3: Process MergeMem nodes from mergemem_worklist. |
1028 // Walk each memory moving the first node encountered of each | |
1029 // instance type to the the input corresponding to its alias index. | |
0 | 1030 while (mergemem_worklist.length() != 0) { |
1031 Node *n = mergemem_worklist.pop(); | |
1032 assert(n->is_MergeMem(), "MergeMem node required."); | |
65 | 1033 if (visited.test_set(n->_idx)) |
1034 continue; | |
0 | 1035 MergeMemNode *nmm = n->as_MergeMem(); |
1036 // Note: we don't want to use MergeMemStream here because we only want to | |
65 | 1037 // scan inputs which exist at the start, not ones we add during processing. |
0 | 1038 uint nslices = nmm->req(); |
1039 igvn->hash_delete(nmm); | |
1040 for (uint i = Compile::AliasIdxRaw+1; i < nslices; i++) { | |
65 | 1041 Node* mem = nmm->in(i); |
1042 Node* cur = NULL; | |
0 | 1043 if (mem == NULL || mem->is_top()) |
1044 continue; | |
1045 while (mem->is_Mem()) { | |
1046 const Type *at = igvn->type(mem->in(MemNode::Address)); | |
1047 if (at != Type::TOP) { | |
1048 assert (at->isa_ptr() != NULL, "pointer type required."); | |
1049 uint idx = (uint)_compile->get_alias_index(at->is_ptr()); | |
1050 if (idx == i) { | |
1051 if (cur == NULL) | |
1052 cur = mem; | |
1053 } else { | |
1054 if (idx >= nmm->req() || nmm->is_empty_memory(nmm->in(idx))) { | |
1055 nmm->set_memory_at(idx, mem); | |
1056 } | |
1057 } | |
1058 } | |
1059 mem = mem->in(MemNode::Memory); | |
1060 } | |
1061 nmm->set_memory_at(i, (cur != NULL) ? cur : mem); | |
65 | 1062 // Find any instance of the current type if we haven't encountered |
1063 // a value of the instance along the chain. | |
1064 for (uint ni = new_index_start; ni < new_index_end; ni++) { | |
1065 if((uint)_compile->get_general_index(ni) == i) { | |
1066 Node *m = (ni >= nmm->req()) ? nmm->empty_memory() : nmm->in(ni); | |
1067 if (nmm->is_empty_memory(m)) { | |
1068 Node* result = find_inst_mem(mem, ni, orig_phis, igvn); | |
1069 if (_compile->failing()) { | |
1070 return; | |
1071 } | |
1072 nmm->set_memory_at(ni, result); | |
1073 } | |
1074 } | |
1075 } | |
1076 } | |
1077 // Find the rest of instances values | |
1078 for (uint ni = new_index_start; ni < new_index_end; ni++) { | |
1079 const TypeOopPtr *tinst = igvn->C->get_adr_type(ni)->isa_oopptr(); | |
1080 Node* result = step_through_mergemem(nmm, ni, tinst); | |
1081 if (result == nmm->base_memory()) { | |
1082 // Didn't find instance memory, search through general slice recursively. | |
1083 result = nmm->memory_at(igvn->C->get_general_index(ni)); | |
1084 result = find_inst_mem(result, ni, orig_phis, igvn); | |
1085 if (_compile->failing()) { | |
1086 return; | |
1087 } | |
1088 nmm->set_memory_at(ni, result); | |
1089 } | |
1090 } | |
1091 igvn->hash_insert(nmm); | |
1092 record_for_optimizer(nmm); | |
1093 | |
1094 // Propagate new memory slices to following MergeMem nodes. | |
1095 for (DUIterator_Fast imax, i = n->fast_outs(imax); i < imax; i++) { | |
1096 Node *use = n->fast_out(i); | |
1097 if (use->is_Call()) { | |
1098 CallNode* in = use->as_Call(); | |
1099 if (in->proj_out(TypeFunc::Memory) != NULL) { | |
1100 Node* m = in->proj_out(TypeFunc::Memory); | |
1101 for (DUIterator_Fast jmax, j = m->fast_outs(jmax); j < jmax; j++) { | |
1102 Node* mm = m->fast_out(j); | |
1103 if (mm->is_MergeMem()) { | |
1104 mergemem_worklist.append_if_missing(mm); | |
1105 } | |
1106 } | |
1107 } | |
1108 if (use->is_Allocate()) { | |
1109 use = use->as_Allocate()->initialization(); | |
1110 if (use == NULL) { | |
1111 continue; | |
1112 } | |
1113 } | |
1114 } | |
1115 if (use->is_Initialize()) { | |
1116 InitializeNode* in = use->as_Initialize(); | |
1117 if (in->proj_out(TypeFunc::Memory) != NULL) { | |
1118 Node* m = in->proj_out(TypeFunc::Memory); | |
1119 for (DUIterator_Fast jmax, j = m->fast_outs(jmax); j < jmax; j++) { | |
1120 Node* mm = m->fast_out(j); | |
1121 if (mm->is_MergeMem()) { | |
1122 mergemem_worklist.append_if_missing(mm); | |
0 | 1123 } |
1124 } | |
1125 } | |
1126 } | |
1127 } | |
1128 } | |
1129 | |
65 | 1130 // Phase 4: Update the inputs of non-instance memory Phis and |
1131 // the Memory input of memnodes | |
0 | 1132 // First update the inputs of any non-instance Phi's from |
1133 // which we split out an instance Phi. Note we don't have | |
1134 // to recursively process Phi's encounted on the input memory | |
1135 // chains as is done in split_memory_phi() since they will | |
1136 // also be processed here. | |
1137 while (orig_phis.length() != 0) { | |
1138 PhiNode *phi = orig_phis.pop(); | |
1139 int alias_idx = _compile->get_alias_index(phi->adr_type()); | |
1140 igvn->hash_delete(phi); | |
1141 for (uint i = 1; i < phi->req(); i++) { | |
1142 Node *mem = phi->in(i); | |
65 | 1143 Node *new_mem = find_inst_mem(mem, alias_idx, orig_phis, igvn); |
1144 if (_compile->failing()) { | |
1145 return; | |
1146 } | |
0 | 1147 if (mem != new_mem) { |
1148 phi->set_req(i, new_mem); | |
1149 } | |
1150 } | |
1151 igvn->hash_insert(phi); | |
1152 record_for_optimizer(phi); | |
1153 } | |
1154 | |
1155 // Update the memory inputs of MemNodes with the value we computed | |
1156 // in Phase 2. | |
1157 for (int i = 0; i < _nodes->length(); i++) { | |
1158 Node *nmem = get_map(i); | |
1159 if (nmem != NULL) { | |
65 | 1160 Node *n = _nodes->adr_at(i)->_node; |
0 | 1161 if (n != NULL && n->is_Mem()) { |
1162 igvn->hash_delete(n); | |
1163 n->set_req(MemNode::Memory, nmem); | |
1164 igvn->hash_insert(n); | |
1165 record_for_optimizer(n); | |
1166 } | |
1167 } | |
1168 } | |
1169 } | |
1170 | |
1171 void ConnectionGraph::compute_escape() { | |
65 | 1172 |
1173 // 1. Populate Connection Graph with Ideal nodes. | |
1174 | |
1175 Unique_Node_List worklist_init; | |
1176 worklist_init.map(_compile->unique(), NULL); // preallocate space | |
1177 | |
1178 // Initialize worklist | |
1179 if (_compile->root() != NULL) { | |
1180 worklist_init.push(_compile->root()); | |
1181 } | |
1182 | |
1183 GrowableArray<int> cg_worklist; | |
1184 PhaseGVN* igvn = _compile->initial_gvn(); | |
1185 bool has_allocations = false; | |
1186 | |
1187 // Push all useful nodes onto CG list and set their type. | |
1188 for( uint next = 0; next < worklist_init.size(); ++next ) { | |
1189 Node* n = worklist_init.at(next); | |
1190 record_for_escape_analysis(n, igvn); | |
1191 if (n->is_Call() && | |
1192 _nodes->adr_at(n->_idx)->node_type() == PointsToNode::JavaObject) { | |
1193 has_allocations = true; | |
1194 } | |
1195 if(n->is_AddP()) | |
1196 cg_worklist.append(n->_idx); | |
1197 for (DUIterator_Fast imax, i = n->fast_outs(imax); i < imax; i++) { | |
1198 Node* m = n->fast_out(i); // Get user | |
1199 worklist_init.push(m); | |
1200 } | |
1201 } | |
0 | 1202 |
65 | 1203 if (has_allocations) { |
1204 _has_allocations = true; | |
1205 } else { | |
1206 _has_allocations = false; | |
1207 _collecting = false; | |
1208 return; // Nothing to do. | |
1209 } | |
1210 | |
1211 // 2. First pass to create simple CG edges (doesn't require to walk CG). | |
1212 for( uint next = 0; next < _delayed_worklist.size(); ++next ) { | |
1213 Node* n = _delayed_worklist.at(next); | |
1214 build_connection_graph(n, igvn); | |
1215 } | |
0 | 1216 |
65 | 1217 // 3. Pass to create fields edges (Allocate -F-> AddP). |
1218 for( int next = 0; next < cg_worklist.length(); ++next ) { | |
1219 int ni = cg_worklist.at(next); | |
1220 build_connection_graph(_nodes->adr_at(ni)->_node, igvn); | |
1221 } | |
1222 | |
1223 cg_worklist.clear(); | |
1224 cg_worklist.append(_phantom_object); | |
1225 | |
1226 // 4. Build Connection Graph which need | |
1227 // to walk the connection graph. | |
1228 for (uint ni = 0; ni < (uint)_nodes->length(); ni++) { | |
1229 PointsToNode* ptn = _nodes->adr_at(ni); | |
1230 Node *n = ptn->_node; | |
1231 if (n != NULL) { // Call, AddP, LoadP, StoreP | |
1232 build_connection_graph(n, igvn); | |
1233 if (ptn->node_type() != PointsToNode::UnknownType) | |
1234 cg_worklist.append(n->_idx); // Collect CG nodes | |
1235 } | |
0 | 1236 } |
1237 | |
1238 VectorSet ptset(Thread::current()->resource_area()); | |
65 | 1239 GrowableArray<Node*> alloc_worklist; |
1240 GrowableArray<int> worklist; | |
0 | 1241 |
1242 // remove deferred edges from the graph and collect | |
1243 // information we will need for type splitting | |
65 | 1244 for( int next = 0; next < cg_worklist.length(); ++next ) { |
1245 int ni = cg_worklist.at(next); | |
1246 PointsToNode* ptn = _nodes->adr_at(ni); | |
0 | 1247 PointsToNode::NodeType nt = ptn->node_type(); |
1248 Node *n = ptn->_node; | |
1249 if (nt == PointsToNode::LocalVar || nt == PointsToNode::Field) { | |
1250 remove_deferred(ni); | |
1251 if (n->is_AddP()) { | |
65 | 1252 // If this AddP computes an address which may point to more that one |
1253 // object, nothing the address points to can be scalar replaceable. | |
1254 Node *base = get_addp_base(n); | |
0 | 1255 ptset.Clear(); |
1256 PointsTo(ptset, base, igvn); | |
1257 if (ptset.Size() > 1) { | |
1258 for( VectorSetI j(&ptset); j.test(); ++j ) { | |
65 | 1259 uint pt = j.elem; |
1260 ptnode_adr(pt)->_scalar_replaceable = false; | |
0 | 1261 } |
1262 } | |
1263 } | |
65 | 1264 } else if (nt == PointsToNode::JavaObject && n->is_Call()) { |
1265 // Push call on alloc_worlist (alocations are calls) | |
1266 // for processing by split_unique_types(). | |
1267 alloc_worklist.append(n); | |
0 | 1268 } |
1269 } | |
65 | 1270 |
0 | 1271 // push all GlobalEscape nodes on the worklist |
65 | 1272 for( int next = 0; next < cg_worklist.length(); ++next ) { |
1273 int nk = cg_worklist.at(next); | |
1274 if (_nodes->adr_at(nk)->escape_state() == PointsToNode::GlobalEscape) | |
1275 worklist.append(nk); | |
0 | 1276 } |
1277 // mark all node reachable from GlobalEscape nodes | |
1278 while(worklist.length() > 0) { | |
1279 PointsToNode n = _nodes->at(worklist.pop()); | |
1280 for (uint ei = 0; ei < n.edge_count(); ei++) { | |
1281 uint npi = n.edge_target(ei); | |
1282 PointsToNode *np = ptnode_adr(npi); | |
65 | 1283 if (np->escape_state() < PointsToNode::GlobalEscape) { |
0 | 1284 np->set_escape_state(PointsToNode::GlobalEscape); |
1285 worklist.append_if_missing(npi); | |
1286 } | |
1287 } | |
1288 } | |
1289 | |
1290 // push all ArgEscape nodes on the worklist | |
65 | 1291 for( int next = 0; next < cg_worklist.length(); ++next ) { |
1292 int nk = cg_worklist.at(next); | |
1293 if (_nodes->adr_at(nk)->escape_state() == PointsToNode::ArgEscape) | |
0 | 1294 worklist.push(nk); |
1295 } | |
1296 // mark all node reachable from ArgEscape nodes | |
1297 while(worklist.length() > 0) { | |
1298 PointsToNode n = _nodes->at(worklist.pop()); | |
1299 for (uint ei = 0; ei < n.edge_count(); ei++) { | |
1300 uint npi = n.edge_target(ei); | |
1301 PointsToNode *np = ptnode_adr(npi); | |
65 | 1302 if (np->escape_state() < PointsToNode::ArgEscape) { |
0 | 1303 np->set_escape_state(PointsToNode::ArgEscape); |
1304 worklist.append_if_missing(npi); | |
1305 } | |
1306 } | |
1307 } | |
65 | 1308 |
1309 // push all NoEscape nodes on the worklist | |
1310 for( int next = 0; next < cg_worklist.length(); ++next ) { | |
1311 int nk = cg_worklist.at(next); | |
1312 if (_nodes->adr_at(nk)->escape_state() == PointsToNode::NoEscape) | |
1313 worklist.push(nk); | |
1314 } | |
1315 // mark all node reachable from NoEscape nodes | |
1316 while(worklist.length() > 0) { | |
1317 PointsToNode n = _nodes->at(worklist.pop()); | |
1318 for (uint ei = 0; ei < n.edge_count(); ei++) { | |
1319 uint npi = n.edge_target(ei); | |
1320 PointsToNode *np = ptnode_adr(npi); | |
1321 if (np->escape_state() < PointsToNode::NoEscape) { | |
1322 np->set_escape_state(PointsToNode::NoEscape); | |
1323 worklist.append_if_missing(npi); | |
1324 } | |
1325 } | |
1326 } | |
1327 | |
0 | 1328 _collecting = false; |
1329 | |
65 | 1330 has_allocations = false; // Are there scalar replaceable allocations? |
0 | 1331 |
65 | 1332 for( int next = 0; next < alloc_worklist.length(); ++next ) { |
1333 Node* n = alloc_worklist.at(next); | |
1334 uint ni = n->_idx; | |
1335 PointsToNode* ptn = _nodes->adr_at(ni); | |
1336 PointsToNode::EscapeState es = ptn->escape_state(); | |
1337 if (ptn->escape_state() == PointsToNode::NoEscape && | |
1338 ptn->_scalar_replaceable) { | |
1339 has_allocations = true; | |
1340 break; | |
1341 } | |
0 | 1342 } |
65 | 1343 if (!has_allocations) { |
1344 return; // Nothing to do. | |
1345 } | |
0 | 1346 |
65 | 1347 if(_compile->AliasLevel() >= 3 && EliminateAllocations) { |
1348 // Now use the escape information to create unique types for | |
1349 // unescaped objects | |
1350 split_unique_types(alloc_worklist); | |
1351 if (_compile->failing()) return; | |
0 | 1352 |
65 | 1353 // Clean up after split unique types. |
1354 ResourceMark rm; | |
1355 PhaseRemoveUseless pru(_compile->initial_gvn(), _compile->for_igvn()); | |
0 | 1356 |
65 | 1357 #ifdef ASSERT |
1358 } else if (PrintEscapeAnalysis || PrintEliminateAllocations) { | |
1359 tty->print("=== No allocations eliminated for "); | |
1360 C()->method()->print_short_name(); | |
1361 if(!EliminateAllocations) { | |
1362 tty->print(" since EliminateAllocations is off ==="); | |
1363 } else if(_compile->AliasLevel() < 3) { | |
1364 tty->print(" since AliasLevel < 3 ==="); | |
0 | 1365 } |
65 | 1366 tty->cr(); |
1367 #endif | |
0 | 1368 } |
1369 } | |
1370 | |
1371 void ConnectionGraph::process_call_arguments(CallNode *call, PhaseTransform *phase) { | |
1372 | |
1373 switch (call->Opcode()) { | |
65 | 1374 #ifdef ASSERT |
0 | 1375 case Op_Allocate: |
1376 case Op_AllocateArray: | |
1377 case Op_Lock: | |
1378 case Op_Unlock: | |
65 | 1379 assert(false, "should be done already"); |
0 | 1380 break; |
65 | 1381 #endif |
1382 case Op_CallLeafNoFP: | |
1383 { | |
1384 // Stub calls, objects do not escape but they are not scale replaceable. | |
1385 // Adjust escape state for outgoing arguments. | |
1386 const TypeTuple * d = call->tf()->domain(); | |
1387 VectorSet ptset(Thread::current()->resource_area()); | |
1388 for (uint i = TypeFunc::Parms; i < d->cnt(); i++) { | |
1389 const Type* at = d->field_at(i); | |
1390 Node *arg = call->in(i)->uncast(); | |
1391 const Type *aat = phase->type(arg); | |
1392 if (!arg->is_top() && at->isa_ptr() && aat->isa_ptr()) { | |
1393 assert(aat == Type::TOP || aat == TypePtr::NULL_PTR || | |
1394 aat->isa_ptr() != NULL, "expecting an Ptr"); | |
1395 set_escape_state(arg->_idx, PointsToNode::ArgEscape); | |
1396 if (arg->is_AddP()) { | |
1397 // | |
1398 // The inline_native_clone() case when the arraycopy stub is called | |
1399 // after the allocation before Initialize and CheckCastPP nodes. | |
1400 // | |
1401 // Set AddP's base (Allocate) as not scalar replaceable since | |
1402 // pointer to the base (with offset) is passed as argument. | |
1403 // | |
1404 arg = get_addp_base(arg); | |
1405 } | |
1406 ptset.Clear(); | |
1407 PointsTo(ptset, arg, phase); | |
1408 for( VectorSetI j(&ptset); j.test(); ++j ) { | |
1409 uint pt = j.elem; | |
1410 set_escape_state(pt, PointsToNode::ArgEscape); | |
1411 } | |
1412 } | |
1413 } | |
1414 break; | |
1415 } | |
0 | 1416 |
1417 case Op_CallStaticJava: | |
1418 // For a static call, we know exactly what method is being called. | |
1419 // Use bytecode estimator to record the call's escape affects | |
1420 { | |
1421 ciMethod *meth = call->as_CallJava()->method(); | |
65 | 1422 BCEscapeAnalyzer *call_analyzer = (meth !=NULL) ? meth->get_bcea() : NULL; |
1423 // fall-through if not a Java method or no analyzer information | |
1424 if (call_analyzer != NULL) { | |
0 | 1425 const TypeTuple * d = call->tf()->domain(); |
1426 VectorSet ptset(Thread::current()->resource_area()); | |
65 | 1427 bool copy_dependencies = false; |
0 | 1428 for (uint i = TypeFunc::Parms; i < d->cnt(); i++) { |
1429 const Type* at = d->field_at(i); | |
1430 int k = i - TypeFunc::Parms; | |
1431 | |
1432 if (at->isa_oopptr() != NULL) { | |
65 | 1433 Node *arg = call->in(i)->uncast(); |
0 | 1434 |
65 | 1435 bool global_escapes = false; |
1436 bool fields_escapes = false; | |
1437 if (!call_analyzer->is_arg_stack(k)) { | |
1438 // The argument global escapes, mark everything it could point to | |
1439 set_escape_state(arg->_idx, PointsToNode::GlobalEscape); | |
1440 global_escapes = true; | |
1441 } else { | |
1442 if (!call_analyzer->is_arg_local(k)) { | |
1443 // The argument itself doesn't escape, but any fields might | |
1444 fields_escapes = true; | |
0 | 1445 } |
65 | 1446 set_escape_state(arg->_idx, PointsToNode::ArgEscape); |
1447 copy_dependencies = true; | |
1448 } | |
1449 | |
1450 ptset.Clear(); | |
1451 PointsTo(ptset, arg, phase); | |
1452 for( VectorSetI j(&ptset); j.test(); ++j ) { | |
1453 uint pt = j.elem; | |
1454 if (global_escapes) { | |
1455 //The argument global escapes, mark everything it could point to | |
1456 set_escape_state(pt, PointsToNode::GlobalEscape); | |
1457 } else { | |
1458 if (fields_escapes) { | |
1459 // The argument itself doesn't escape, but any fields might | |
1460 add_edge_from_fields(pt, _phantom_object, Type::OffsetBot); | |
1461 } | |
1462 set_escape_state(pt, PointsToNode::ArgEscape); | |
0 | 1463 } |
1464 } | |
1465 } | |
1466 } | |
65 | 1467 if (copy_dependencies) |
1468 call_analyzer->copy_dependencies(C()->dependencies()); | |
0 | 1469 break; |
1470 } | |
1471 } | |
1472 | |
1473 default: | |
65 | 1474 // Fall-through here if not a Java method or no analyzer information |
1475 // or some other type of call, assume the worst case: all arguments | |
0 | 1476 // globally escape. |
1477 { | |
1478 // adjust escape state for outgoing arguments | |
1479 const TypeTuple * d = call->tf()->domain(); | |
1480 VectorSet ptset(Thread::current()->resource_area()); | |
1481 for (uint i = TypeFunc::Parms; i < d->cnt(); i++) { | |
1482 const Type* at = d->field_at(i); | |
1483 if (at->isa_oopptr() != NULL) { | |
65 | 1484 Node *arg = call->in(i)->uncast(); |
1485 set_escape_state(arg->_idx, PointsToNode::GlobalEscape); | |
0 | 1486 ptset.Clear(); |
1487 PointsTo(ptset, arg, phase); | |
1488 for( VectorSetI j(&ptset); j.test(); ++j ) { | |
1489 uint pt = j.elem; | |
1490 set_escape_state(pt, PointsToNode::GlobalEscape); | |
65 | 1491 PointsToNode *ptadr = ptnode_adr(pt); |
0 | 1492 } |
1493 } | |
1494 } | |
1495 } | |
1496 } | |
1497 } | |
1498 void ConnectionGraph::process_call_result(ProjNode *resproj, PhaseTransform *phase) { | |
1499 PointsToNode *ptadr = ptnode_adr(resproj->_idx); | |
1500 | |
65 | 1501 CallNode *call = resproj->in(0)->as_Call(); |
0 | 1502 switch (call->Opcode()) { |
1503 case Op_Allocate: | |
1504 { | |
1505 Node *k = call->in(AllocateNode::KlassNode); | |
1506 const TypeKlassPtr *kt; | |
1507 if (k->Opcode() == Op_LoadKlass) { | |
1508 kt = k->as_Load()->type()->isa_klassptr(); | |
1509 } else { | |
1510 kt = k->as_Type()->type()->isa_klassptr(); | |
1511 } | |
1512 assert(kt != NULL, "TypeKlassPtr required."); | |
1513 ciKlass* cik = kt->klass(); | |
1514 ciInstanceKlass* ciik = cik->as_instance_klass(); | |
1515 | |
1516 PointsToNode *ptadr = ptnode_adr(call->_idx); | |
65 | 1517 PointsToNode::EscapeState es; |
1518 uint edge_to; | |
0 | 1519 if (cik->is_subclass_of(_compile->env()->Thread_klass()) || ciik->has_finalizer()) { |
65 | 1520 es = PointsToNode::GlobalEscape; |
1521 edge_to = _phantom_object; // Could not be worse | |
0 | 1522 } else { |
65 | 1523 es = PointsToNode::NoEscape; |
1524 edge_to = call->_idx; | |
0 | 1525 } |
65 | 1526 set_escape_state(call->_idx, es); |
1527 add_pointsto_edge(resproj->_idx, edge_to); | |
1528 _processed.set(resproj->_idx); | |
0 | 1529 break; |
1530 } | |
1531 | |
1532 case Op_AllocateArray: | |
1533 { | |
1534 PointsToNode *ptadr = ptnode_adr(call->_idx); | |
65 | 1535 int length = call->in(AllocateNode::ALength)->find_int_con(-1); |
1536 if (length < 0 || length > EliminateAllocationArraySizeLimit) { | |
1537 // Not scalar replaceable if the length is not constant or too big. | |
1538 ptadr->_scalar_replaceable = false; | |
1539 } | |
0 | 1540 set_escape_state(call->_idx, PointsToNode::NoEscape); |
1541 add_pointsto_edge(resproj->_idx, call->_idx); | |
65 | 1542 _processed.set(resproj->_idx); |
0 | 1543 break; |
1544 } | |
1545 | |
1546 case Op_CallStaticJava: | |
1547 // For a static call, we know exactly what method is being called. | |
1548 // Use bytecode estimator to record whether the call's return value escapes | |
1549 { | |
65 | 1550 bool done = true; |
0 | 1551 const TypeTuple *r = call->tf()->range(); |
1552 const Type* ret_type = NULL; | |
1553 | |
1554 if (r->cnt() > TypeFunc::Parms) | |
1555 ret_type = r->field_at(TypeFunc::Parms); | |
1556 | |
1557 // Note: we use isa_ptr() instead of isa_oopptr() here because the | |
1558 // _multianewarray functions return a TypeRawPtr. | |
65 | 1559 if (ret_type == NULL || ret_type->isa_ptr() == NULL) { |
1560 _processed.set(resproj->_idx); | |
0 | 1561 break; // doesn't return a pointer type |
65 | 1562 } |
0 | 1563 ciMethod *meth = call->as_CallJava()->method(); |
65 | 1564 const TypeTuple * d = call->tf()->domain(); |
0 | 1565 if (meth == NULL) { |
1566 // not a Java method, assume global escape | |
1567 set_escape_state(call->_idx, PointsToNode::GlobalEscape); | |
1568 if (resproj != NULL) | |
1569 add_pointsto_edge(resproj->_idx, _phantom_object); | |
1570 } else { | |
65 | 1571 BCEscapeAnalyzer *call_analyzer = meth->get_bcea(); |
0 | 1572 VectorSet ptset(Thread::current()->resource_area()); |
65 | 1573 bool copy_dependencies = false; |
0 | 1574 |
65 | 1575 if (call_analyzer->is_return_allocated()) { |
1576 // Returns a newly allocated unescaped object, simply | |
1577 // update dependency information. | |
1578 // Mark it as NoEscape so that objects referenced by | |
1579 // it's fields will be marked as NoEscape at least. | |
1580 set_escape_state(call->_idx, PointsToNode::NoEscape); | |
1581 if (resproj != NULL) | |
1582 add_pointsto_edge(resproj->_idx, call->_idx); | |
1583 copy_dependencies = true; | |
1584 } else if (call_analyzer->is_return_local() && resproj != NULL) { | |
0 | 1585 // determine whether any arguments are returned |
1586 set_escape_state(call->_idx, PointsToNode::NoEscape); | |
1587 for (uint i = TypeFunc::Parms; i < d->cnt(); i++) { | |
1588 const Type* at = d->field_at(i); | |
1589 | |
1590 if (at->isa_oopptr() != NULL) { | |
65 | 1591 Node *arg = call->in(i)->uncast(); |
0 | 1592 |
65 | 1593 if (call_analyzer->is_arg_returned(i - TypeFunc::Parms)) { |
0 | 1594 PointsToNode *arg_esp = _nodes->adr_at(arg->_idx); |
65 | 1595 if (arg_esp->node_type() == PointsToNode::UnknownType) |
1596 done = false; | |
1597 else if (arg_esp->node_type() == PointsToNode::JavaObject) | |
0 | 1598 add_pointsto_edge(resproj->_idx, arg->_idx); |
1599 else | |
1600 add_deferred_edge(resproj->_idx, arg->_idx); | |
1601 arg_esp->_hidden_alias = true; | |
1602 } | |
1603 } | |
1604 } | |
65 | 1605 copy_dependencies = true; |
0 | 1606 } else { |
1607 set_escape_state(call->_idx, PointsToNode::GlobalEscape); | |
1608 if (resproj != NULL) | |
1609 add_pointsto_edge(resproj->_idx, _phantom_object); | |
65 | 1610 for (uint i = TypeFunc::Parms; i < d->cnt(); i++) { |
1611 const Type* at = d->field_at(i); | |
1612 if (at->isa_oopptr() != NULL) { | |
1613 Node *arg = call->in(i)->uncast(); | |
1614 PointsToNode *arg_esp = _nodes->adr_at(arg->_idx); | |
1615 arg_esp->_hidden_alias = true; | |
1616 } | |
1617 } | |
0 | 1618 } |
65 | 1619 if (copy_dependencies) |
1620 call_analyzer->copy_dependencies(C()->dependencies()); | |
0 | 1621 } |
65 | 1622 if (done) |
1623 _processed.set(resproj->_idx); | |
0 | 1624 break; |
1625 } | |
1626 | |
1627 default: | |
1628 // Some other type of call, assume the worst case that the | |
1629 // returned value, if any, globally escapes. | |
1630 { | |
1631 const TypeTuple *r = call->tf()->range(); | |
1632 if (r->cnt() > TypeFunc::Parms) { | |
1633 const Type* ret_type = r->field_at(TypeFunc::Parms); | |
1634 | |
1635 // Note: we use isa_ptr() instead of isa_oopptr() here because the | |
1636 // _multianewarray functions return a TypeRawPtr. | |
1637 if (ret_type->isa_ptr() != NULL) { | |
1638 PointsToNode *ptadr = ptnode_adr(call->_idx); | |
1639 set_escape_state(call->_idx, PointsToNode::GlobalEscape); | |
1640 if (resproj != NULL) | |
1641 add_pointsto_edge(resproj->_idx, _phantom_object); | |
1642 } | |
1643 } | |
65 | 1644 _processed.set(resproj->_idx); |
0 | 1645 } |
1646 } | |
1647 } | |
1648 | |
65 | 1649 // Populate Connection Graph with Ideal nodes and create simple |
1650 // connection graph edges (do not need to check the node_type of inputs | |
1651 // or to call PointsTo() to walk the connection graph). | |
1652 void ConnectionGraph::record_for_escape_analysis(Node *n, PhaseTransform *phase) { | |
1653 if (_processed.test(n->_idx)) | |
1654 return; // No need to redefine node's state. | |
1655 | |
1656 if (n->is_Call()) { | |
1657 // Arguments to allocation and locking don't escape. | |
1658 if (n->is_Allocate()) { | |
1659 add_node(n, PointsToNode::JavaObject, PointsToNode::UnknownEscape, true); | |
1660 record_for_optimizer(n); | |
1661 } else if (n->is_Lock() || n->is_Unlock()) { | |
1662 // Put Lock and Unlock nodes on IGVN worklist to process them during | |
1663 // the first IGVN optimization when escape information is still available. | |
1664 record_for_optimizer(n); | |
1665 _processed.set(n->_idx); | |
1666 } else { | |
1667 // Have to process call's arguments first. | |
1668 PointsToNode::NodeType nt = PointsToNode::UnknownType; | |
1669 | |
1670 // Check if a call returns an object. | |
1671 const TypeTuple *r = n->as_Call()->tf()->range(); | |
1672 if (r->cnt() > TypeFunc::Parms && | |
1673 n->as_Call()->proj_out(TypeFunc::Parms) != NULL) { | |
1674 // Note: use isa_ptr() instead of isa_oopptr() here because | |
1675 // the _multianewarray functions return a TypeRawPtr. | |
1676 if (r->field_at(TypeFunc::Parms)->isa_ptr() != NULL) { | |
1677 nt = PointsToNode::JavaObject; | |
1678 } | |
1679 } | |
1680 add_node(n, nt, PointsToNode::UnknownEscape, false); | |
1681 } | |
1682 return; | |
1683 } | |
1684 | |
1685 // Using isa_ptr() instead of isa_oopptr() for LoadP and Phi because | |
1686 // ThreadLocal has RawPrt type. | |
1687 switch (n->Opcode()) { | |
1688 case Op_AddP: | |
1689 { | |
1690 add_node(n, PointsToNode::Field, PointsToNode::UnknownEscape, false); | |
1691 break; | |
1692 } | |
1693 case Op_CastX2P: | |
1694 { // "Unsafe" memory access. | |
1695 add_node(n, PointsToNode::JavaObject, PointsToNode::GlobalEscape, true); | |
1696 break; | |
1697 } | |
1698 case Op_CastPP: | |
1699 case Op_CheckCastPP: | |
1700 { | |
1701 add_node(n, PointsToNode::LocalVar, PointsToNode::UnknownEscape, false); | |
1702 int ti = n->in(1)->_idx; | |
1703 PointsToNode::NodeType nt = _nodes->adr_at(ti)->node_type(); | |
1704 if (nt == PointsToNode::UnknownType) { | |
1705 _delayed_worklist.push(n); // Process it later. | |
1706 break; | |
1707 } else if (nt == PointsToNode::JavaObject) { | |
1708 add_pointsto_edge(n->_idx, ti); | |
1709 } else { | |
1710 add_deferred_edge(n->_idx, ti); | |
1711 } | |
1712 _processed.set(n->_idx); | |
1713 break; | |
1714 } | |
1715 case Op_ConP: | |
1716 { | |
1717 // assume all pointer constants globally escape except for null | |
1718 PointsToNode::EscapeState es; | |
1719 if (phase->type(n) == TypePtr::NULL_PTR) | |
1720 es = PointsToNode::NoEscape; | |
1721 else | |
1722 es = PointsToNode::GlobalEscape; | |
0 | 1723 |
65 | 1724 add_node(n, PointsToNode::JavaObject, es, true); |
1725 break; | |
1726 } | |
1727 case Op_CreateEx: | |
1728 { | |
1729 // assume that all exception objects globally escape | |
1730 add_node(n, PointsToNode::JavaObject, PointsToNode::GlobalEscape, true); | |
1731 break; | |
1732 } | |
1733 case Op_LoadKlass: | |
1734 { | |
1735 add_node(n, PointsToNode::JavaObject, PointsToNode::GlobalEscape, true); | |
1736 break; | |
1737 } | |
1738 case Op_LoadP: | |
1739 { | |
1740 const Type *t = phase->type(n); | |
1741 if (t->isa_ptr() == NULL) { | |
1742 _processed.set(n->_idx); | |
1743 return; | |
1744 } | |
1745 add_node(n, PointsToNode::LocalVar, PointsToNode::UnknownEscape, false); | |
1746 break; | |
1747 } | |
1748 case Op_Parm: | |
1749 { | |
1750 _processed.set(n->_idx); // No need to redefine it state. | |
1751 uint con = n->as_Proj()->_con; | |
1752 if (con < TypeFunc::Parms) | |
1753 return; | |
1754 const Type *t = n->in(0)->as_Start()->_domain->field_at(con); | |
1755 if (t->isa_ptr() == NULL) | |
1756 return; | |
1757 // We have to assume all input parameters globally escape | |
1758 // (Note: passing 'false' since _processed is already set). | |
1759 add_node(n, PointsToNode::JavaObject, PointsToNode::GlobalEscape, false); | |
1760 break; | |
1761 } | |
1762 case Op_Phi: | |
1763 { | |
1764 if (n->as_Phi()->type()->isa_ptr() == NULL) { | |
1765 // nothing to do if not an oop | |
1766 _processed.set(n->_idx); | |
1767 return; | |
1768 } | |
1769 add_node(n, PointsToNode::LocalVar, PointsToNode::UnknownEscape, false); | |
1770 uint i; | |
1771 for (i = 1; i < n->req() ; i++) { | |
1772 Node* in = n->in(i); | |
1773 if (in == NULL) | |
1774 continue; // ignore NULL | |
1775 in = in->uncast(); | |
1776 if (in->is_top() || in == n) | |
1777 continue; // ignore top or inputs which go back this node | |
1778 int ti = in->_idx; | |
1779 PointsToNode::NodeType nt = _nodes->adr_at(ti)->node_type(); | |
1780 if (nt == PointsToNode::UnknownType) { | |
1781 break; | |
1782 } else if (nt == PointsToNode::JavaObject) { | |
1783 add_pointsto_edge(n->_idx, ti); | |
1784 } else { | |
1785 add_deferred_edge(n->_idx, ti); | |
1786 } | |
1787 } | |
1788 if (i >= n->req()) | |
1789 _processed.set(n->_idx); | |
1790 else | |
1791 _delayed_worklist.push(n); | |
1792 break; | |
1793 } | |
1794 case Op_Proj: | |
1795 { | |
1796 // we are only interested in the result projection from a call | |
1797 if (n->as_Proj()->_con == TypeFunc::Parms && n->in(0)->is_Call() ) { | |
1798 add_node(n, PointsToNode::LocalVar, PointsToNode::UnknownEscape, false); | |
1799 process_call_result(n->as_Proj(), phase); | |
1800 if (!_processed.test(n->_idx)) { | |
1801 // The call's result may need to be processed later if the call | |
1802 // returns it's argument and the argument is not processed yet. | |
1803 _delayed_worklist.push(n); | |
1804 } | |
1805 } else { | |
1806 _processed.set(n->_idx); | |
1807 } | |
1808 break; | |
1809 } | |
1810 case Op_Return: | |
1811 { | |
1812 if( n->req() > TypeFunc::Parms && | |
1813 phase->type(n->in(TypeFunc::Parms))->isa_oopptr() ) { | |
1814 // Treat Return value as LocalVar with GlobalEscape escape state. | |
1815 add_node(n, PointsToNode::LocalVar, PointsToNode::GlobalEscape, false); | |
1816 int ti = n->in(TypeFunc::Parms)->_idx; | |
1817 PointsToNode::NodeType nt = _nodes->adr_at(ti)->node_type(); | |
1818 if (nt == PointsToNode::UnknownType) { | |
1819 _delayed_worklist.push(n); // Process it later. | |
1820 break; | |
1821 } else if (nt == PointsToNode::JavaObject) { | |
1822 add_pointsto_edge(n->_idx, ti); | |
1823 } else { | |
1824 add_deferred_edge(n->_idx, ti); | |
1825 } | |
1826 } | |
1827 _processed.set(n->_idx); | |
1828 break; | |
1829 } | |
1830 case Op_StoreP: | |
1831 { | |
1832 const Type *adr_type = phase->type(n->in(MemNode::Address)); | |
1833 if (adr_type->isa_oopptr()) { | |
1834 add_node(n, PointsToNode::UnknownType, PointsToNode::UnknownEscape, false); | |
1835 } else { | |
1836 Node* adr = n->in(MemNode::Address); | |
1837 if (adr->is_AddP() && phase->type(adr) == TypeRawPtr::NOTNULL && | |
1838 adr->in(AddPNode::Address)->is_Proj() && | |
1839 adr->in(AddPNode::Address)->in(0)->is_Allocate()) { | |
1840 add_node(n, PointsToNode::UnknownType, PointsToNode::UnknownEscape, false); | |
1841 // We are computing a raw address for a store captured | |
1842 // by an Initialize compute an appropriate address type. | |
1843 int offs = (int)phase->find_intptr_t_con(adr->in(AddPNode::Offset), Type::OffsetBot); | |
1844 assert(offs != Type::OffsetBot, "offset must be a constant"); | |
1845 } else { | |
1846 _processed.set(n->_idx); | |
1847 return; | |
1848 } | |
1849 } | |
1850 break; | |
1851 } | |
1852 case Op_StorePConditional: | |
1853 case Op_CompareAndSwapP: | |
1854 { | |
1855 const Type *adr_type = phase->type(n->in(MemNode::Address)); | |
1856 if (adr_type->isa_oopptr()) { | |
1857 add_node(n, PointsToNode::UnknownType, PointsToNode::UnknownEscape, false); | |
1858 } else { | |
1859 _processed.set(n->_idx); | |
1860 return; | |
1861 } | |
1862 break; | |
1863 } | |
1864 case Op_ThreadLocal: | |
1865 { | |
1866 add_node(n, PointsToNode::JavaObject, PointsToNode::ArgEscape, true); | |
1867 break; | |
1868 } | |
1869 default: | |
1870 ; | |
1871 // nothing to do | |
1872 } | |
1873 return; | |
1874 } | |
1875 | |
1876 void ConnectionGraph::build_connection_graph(Node *n, PhaseTransform *phase) { | |
1877 // Don't set processed bit for AddP, LoadP, StoreP since | |
1878 // they may need more then one pass to process. | |
1879 if (_processed.test(n->_idx)) | |
1880 return; // No need to redefine node's state. | |
1881 | |
0 | 1882 PointsToNode *ptadr = ptnode_adr(n->_idx); |
1883 | |
1884 if (n->is_Call()) { | |
1885 CallNode *call = n->as_Call(); | |
1886 process_call_arguments(call, phase); | |
65 | 1887 _processed.set(n->_idx); |
0 | 1888 return; |
1889 } | |
1890 | |
65 | 1891 switch (n->Opcode()) { |
0 | 1892 case Op_AddP: |
1893 { | |
65 | 1894 Node *base = get_addp_base(n); |
1895 // Create a field edge to this node from everything base could point to. | |
0 | 1896 VectorSet ptset(Thread::current()->resource_area()); |
1897 PointsTo(ptset, base, phase); | |
1898 for( VectorSetI i(&ptset); i.test(); ++i ) { | |
1899 uint pt = i.elem; | |
65 | 1900 add_field_edge(pt, n->_idx, address_offset(n, phase)); |
1901 } | |
1902 break; | |
1903 } | |
1904 case Op_CastX2P: | |
1905 { | |
1906 assert(false, "Op_CastX2P"); | |
1907 break; | |
1908 } | |
1909 case Op_CastPP: | |
1910 case Op_CheckCastPP: | |
1911 { | |
1912 int ti = n->in(1)->_idx; | |
1913 if (_nodes->adr_at(ti)->node_type() == PointsToNode::JavaObject) { | |
1914 add_pointsto_edge(n->_idx, ti); | |
1915 } else { | |
1916 add_deferred_edge(n->_idx, ti); | |
1917 } | |
1918 _processed.set(n->_idx); | |
1919 break; | |
1920 } | |
1921 case Op_ConP: | |
1922 { | |
1923 assert(false, "Op_ConP"); | |
1924 break; | |
1925 } | |
1926 case Op_CreateEx: | |
1927 { | |
1928 assert(false, "Op_CreateEx"); | |
1929 break; | |
1930 } | |
1931 case Op_LoadKlass: | |
1932 { | |
1933 assert(false, "Op_LoadKlass"); | |
1934 break; | |
1935 } | |
1936 case Op_LoadP: | |
1937 { | |
1938 const Type *t = phase->type(n); | |
1939 #ifdef ASSERT | |
1940 if (t->isa_ptr() == NULL) | |
1941 assert(false, "Op_LoadP"); | |
1942 #endif | |
1943 | |
1944 Node* adr = n->in(MemNode::Address)->uncast(); | |
1945 const Type *adr_type = phase->type(adr); | |
1946 Node* adr_base; | |
1947 if (adr->is_AddP()) { | |
1948 adr_base = get_addp_base(adr); | |
1949 } else { | |
1950 adr_base = adr; | |
1951 } | |
1952 | |
1953 // For everything "adr_base" could point to, create a deferred edge from | |
1954 // this node to each field with the same offset. | |
1955 VectorSet ptset(Thread::current()->resource_area()); | |
1956 PointsTo(ptset, adr_base, phase); | |
1957 int offset = address_offset(adr, phase); | |
1958 for( VectorSetI i(&ptset); i.test(); ++i ) { | |
1959 uint pt = i.elem; | |
1960 add_deferred_edge_to_fields(n->_idx, pt, offset); | |
0 | 1961 } |
1962 break; | |
1963 } | |
1964 case Op_Parm: | |
1965 { | |
65 | 1966 assert(false, "Op_Parm"); |
0 | 1967 break; |
1968 } | |
1969 case Op_Phi: | |
1970 { | |
65 | 1971 #ifdef ASSERT |
1972 if (n->as_Phi()->type()->isa_ptr() == NULL) | |
1973 assert(false, "Op_Phi"); | |
1974 #endif | |
1975 for (uint i = 1; i < n->req() ; i++) { | |
1976 Node* in = n->in(i); | |
1977 if (in == NULL) | |
1978 continue; // ignore NULL | |
1979 in = in->uncast(); | |
1980 if (in->is_top() || in == n) | |
1981 continue; // ignore top or inputs which go back this node | |
1982 int ti = in->_idx; | |
1983 if (_nodes->adr_at(in->_idx)->node_type() == PointsToNode::JavaObject) { | |
1984 add_pointsto_edge(n->_idx, ti); | |
1985 } else { | |
1986 add_deferred_edge(n->_idx, ti); | |
1987 } | |
1988 } | |
0 | 1989 _processed.set(n->_idx); |
1990 break; | |
1991 } | |
65 | 1992 case Op_Proj: |
0 | 1993 { |
65 | 1994 // we are only interested in the result projection from a call |
1995 if (n->as_Proj()->_con == TypeFunc::Parms && n->in(0)->is_Call() ) { | |
1996 process_call_result(n->as_Proj(), phase); | |
1997 assert(_processed.test(n->_idx), "all call results should be processed"); | |
1998 } else { | |
1999 assert(false, "Op_Proj"); | |
2000 } | |
0 | 2001 break; |
2002 } | |
65 | 2003 case Op_Return: |
0 | 2004 { |
65 | 2005 #ifdef ASSERT |
2006 if( n->req() <= TypeFunc::Parms || | |
2007 !phase->type(n->in(TypeFunc::Parms))->isa_oopptr() ) { | |
2008 assert(false, "Op_Return"); | |
0 | 2009 } |
65 | 2010 #endif |
2011 int ti = n->in(TypeFunc::Parms)->_idx; | |
2012 if (_nodes->adr_at(ti)->node_type() == PointsToNode::JavaObject) { | |
2013 add_pointsto_edge(n->_idx, ti); | |
2014 } else { | |
2015 add_deferred_edge(n->_idx, ti); | |
2016 } | |
2017 _processed.set(n->_idx); | |
0 | 2018 break; |
2019 } | |
2020 case Op_StoreP: | |
2021 case Op_StorePConditional: | |
2022 case Op_CompareAndSwapP: | |
2023 { | |
2024 Node *adr = n->in(MemNode::Address); | |
2025 const Type *adr_type = phase->type(adr); | |
65 | 2026 #ifdef ASSERT |
0 | 2027 if (!adr_type->isa_oopptr()) |
65 | 2028 assert(phase->type(adr) == TypeRawPtr::NOTNULL, "Op_StoreP"); |
2029 #endif | |
0 | 2030 |
65 | 2031 assert(adr->is_AddP(), "expecting an AddP"); |
2032 Node *adr_base = get_addp_base(adr); | |
2033 Node *val = n->in(MemNode::ValueIn)->uncast(); | |
2034 // For everything "adr_base" could point to, create a deferred edge | |
2035 // to "val" from each field with the same offset. | |
0 | 2036 VectorSet ptset(Thread::current()->resource_area()); |
2037 PointsTo(ptset, adr_base, phase); | |
2038 for( VectorSetI i(&ptset); i.test(); ++i ) { | |
2039 uint pt = i.elem; | |
65 | 2040 add_edge_from_fields(pt, val->_idx, address_offset(adr, phase)); |
0 | 2041 } |
2042 break; | |
2043 } | |
65 | 2044 case Op_ThreadLocal: |
0 | 2045 { |
65 | 2046 assert(false, "Op_ThreadLocal"); |
0 | 2047 break; |
2048 } | |
2049 default: | |
2050 ; | |
2051 // nothing to do | |
2052 } | |
2053 } | |
2054 | |
2055 #ifndef PRODUCT | |
2056 void ConnectionGraph::dump() { | |
2057 PhaseGVN *igvn = _compile->initial_gvn(); | |
2058 bool first = true; | |
2059 | |
65 | 2060 uint size = (uint)_nodes->length(); |
2061 for (uint ni = 0; ni < size; ni++) { | |
2062 PointsToNode *ptn = _nodes->adr_at(ni); | |
2063 PointsToNode::NodeType ptn_type = ptn->node_type(); | |
2064 | |
2065 if (ptn_type != PointsToNode::JavaObject || ptn->_node == NULL) | |
0 | 2066 continue; |
65 | 2067 PointsToNode::EscapeState es = escape_state(ptn->_node, igvn); |
2068 if (ptn->_node->is_Allocate() && (es == PointsToNode::NoEscape || Verbose)) { | |
2069 if (first) { | |
2070 tty->cr(); | |
2071 tty->print("======== Connection graph for "); | |
2072 C()->method()->print_short_name(); | |
2073 tty->cr(); | |
2074 first = false; | |
2075 } | |
2076 tty->print("%6d ", ni); | |
2077 ptn->dump(); | |
2078 // Print all locals which reference this allocation | |
2079 for (uint li = ni; li < size; li++) { | |
2080 PointsToNode *ptn_loc = _nodes->adr_at(li); | |
2081 PointsToNode::NodeType ptn_loc_type = ptn_loc->node_type(); | |
2082 if ( ptn_loc_type == PointsToNode::LocalVar && ptn_loc->_node != NULL && | |
2083 ptn_loc->edge_count() == 1 && ptn_loc->edge_target(0) == ni ) { | |
2084 tty->print("%6d LocalVar [[%d]]", li, ni); | |
2085 _nodes->adr_at(li)->_node->dump(); | |
0 | 2086 } |
2087 } | |
65 | 2088 if (Verbose) { |
2089 // Print all fields which reference this allocation | |
2090 for (uint i = 0; i < ptn->edge_count(); i++) { | |
2091 uint ei = ptn->edge_target(i); | |
2092 tty->print("%6d Field [[%d]]", ei, ni); | |
2093 _nodes->adr_at(ei)->_node->dump(); | |
2094 } | |
2095 } | |
2096 tty->cr(); | |
0 | 2097 } |
2098 } | |
2099 } | |
2100 #endif |