Mercurial > hg > truffle
annotate src/share/vm/opto/graphKit.hpp @ 900:9987d9d5eb0e
6833129: specjvm98 fails with NullPointerException in the compiler with -XX:DeoptimizeALot
Summary: developed a reexecute logic for the interpreter to reexecute the bytecode when deopt happens
Reviewed-by: kvn, never, jrose, twisti
author | cfang |
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date | Fri, 31 Jul 2009 17:12:33 -0700 |
parents | fc4be448891f |
children | 685e959d09ea |
rev | line source |
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0 | 1 /* |
579 | 2 * Copyright 2001-2009 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 class FastLockNode; | |
26 class FastUnlockNode; | |
342 | 27 class IdealKit; |
0 | 28 class Parse; |
29 class RootNode; | |
30 | |
31 //----------------------------------------------------------------------------- | |
32 //----------------------------GraphKit----------------------------------------- | |
33 // Toolkit for building the common sorts of subgraphs. | |
34 // Does not know about bytecode parsing or type-flow results. | |
35 // It is able to create graphs implementing the semantics of most | |
36 // or all bytecodes, so that it can expand intrinsics and calls. | |
37 // It may depend on JVMState structure, but it must not depend | |
38 // on specific bytecode streams. | |
39 class GraphKit : public Phase { | |
40 friend class PreserveJVMState; | |
41 | |
42 protected: | |
43 ciEnv* _env; // Compilation environment | |
44 PhaseGVN &_gvn; // Some optimizations while parsing | |
45 SafePointNode* _map; // Parser map from JVM to Nodes | |
46 SafePointNode* _exceptions;// Parser map(s) for exception state(s) | |
47 int _sp; // JVM Expression Stack Pointer | |
48 int _bci; // JVM Bytecode Pointer | |
49 ciMethod* _method; // JVM Current Method | |
50 | |
51 private: | |
52 SafePointNode* map_not_null() const { | |
53 assert(_map != NULL, "must call stopped() to test for reset compiler map"); | |
54 return _map; | |
55 } | |
56 | |
57 public: | |
58 GraphKit(); // empty constructor | |
59 GraphKit(JVMState* jvms); // the JVM state on which to operate | |
60 | |
61 #ifdef ASSERT | |
62 ~GraphKit() { | |
63 assert(!has_exceptions(), "user must call transfer_exceptions_into_jvms"); | |
64 } | |
65 #endif | |
66 | |
67 virtual Parse* is_Parse() const { return NULL; } | |
68 | |
69 ciEnv* env() const { return _env; } | |
70 PhaseGVN& gvn() const { return _gvn; } | |
71 | |
72 void record_for_igvn(Node* n) const { C->record_for_igvn(n); } // delegate to Compile | |
73 | |
74 // Handy well-known nodes: | |
75 Node* null() const { return zerocon(T_OBJECT); } | |
76 Node* top() const { return C->top(); } | |
77 RootNode* root() const { return C->root(); } | |
78 | |
79 // Create or find a constant node | |
80 Node* intcon(jint con) const { return _gvn.intcon(con); } | |
81 Node* longcon(jlong con) const { return _gvn.longcon(con); } | |
82 Node* makecon(const Type *t) const { return _gvn.makecon(t); } | |
83 Node* zerocon(BasicType bt) const { return _gvn.zerocon(bt); } | |
84 // (See also macro MakeConX in type.hpp, which uses intcon or longcon.) | |
85 | |
563
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86 // Helper for byte_map_base |
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87 Node* byte_map_base_node() { |
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88 // Get base of card map |
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89 CardTableModRefBS* ct = (CardTableModRefBS*)(Universe::heap()->barrier_set()); |
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90 assert(sizeof(*ct->byte_map_base) == sizeof(jbyte), "adjust users of this code"); |
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91 if (ct->byte_map_base != NULL) { |
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92 return makecon(TypeRawPtr::make((address)ct->byte_map_base)); |
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93 } else { |
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94 return null(); |
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95 } |
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96 } |
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97 |
0 | 98 jint find_int_con(Node* n, jint value_if_unknown) { |
99 return _gvn.find_int_con(n, value_if_unknown); | |
100 } | |
101 jlong find_long_con(Node* n, jlong value_if_unknown) { | |
102 return _gvn.find_long_con(n, value_if_unknown); | |
103 } | |
104 // (See also macro find_intptr_t_con in type.hpp, which uses one of these.) | |
105 | |
106 // JVM State accessors: | |
107 // Parser mapping from JVM indices into Nodes. | |
108 // Low slots are accessed by the StartNode::enum. | |
109 // Then come the locals at StartNode::Parms to StartNode::Parms+max_locals(); | |
110 // Then come JVM stack slots. | |
111 // Finally come the monitors, if any. | |
112 // See layout accessors in class JVMState. | |
113 | |
114 SafePointNode* map() const { return _map; } | |
115 bool has_exceptions() const { return _exceptions != NULL; } | |
116 JVMState* jvms() const { return map_not_null()->_jvms; } | |
117 int sp() const { return _sp; } | |
118 int bci() const { return _bci; } | |
119 Bytecodes::Code java_bc() const; | |
120 ciMethod* method() const { return _method; } | |
121 | |
122 void set_jvms(JVMState* jvms) { set_map(jvms->map()); | |
123 assert(jvms == this->jvms(), "sanity"); | |
124 _sp = jvms->sp(); | |
125 _bci = jvms->bci(); | |
126 _method = jvms->has_method() ? jvms->method() : NULL; } | |
127 void set_map(SafePointNode* m) { _map = m; debug_only(verify_map()); } | |
128 void set_sp(int i) { assert(i >= 0, "must be non-negative"); _sp = i; } | |
129 void clean_stack(int from_sp); // clear garbage beyond from_sp to top | |
130 | |
131 void inc_sp(int i) { set_sp(sp() + i); } | |
132 void set_bci(int bci) { _bci = bci; } | |
133 | |
134 // Make sure jvms has current bci & sp. | |
135 JVMState* sync_jvms() const; | |
136 #ifdef ASSERT | |
137 // Make sure JVMS has an updated copy of bci and sp. | |
138 // Also sanity-check method, depth, and monitor depth. | |
139 bool jvms_in_sync() const; | |
140 | |
141 // Make sure the map looks OK. | |
142 void verify_map() const; | |
143 | |
144 // Make sure a proposed exception state looks OK. | |
145 static void verify_exception_state(SafePointNode* ex_map); | |
146 #endif | |
147 | |
148 // Clone the existing map state. (Implements PreserveJVMState.) | |
149 SafePointNode* clone_map(); | |
150 | |
151 // Set the map to a clone of the given one. | |
152 void set_map_clone(SafePointNode* m); | |
153 | |
154 // Tell if the compilation is failing. | |
155 bool failing() const { return C->failing(); } | |
156 | |
157 // Set _map to NULL, signalling a stop to further bytecode execution. | |
158 // Preserve the map intact for future use, and return it back to the caller. | |
159 SafePointNode* stop() { SafePointNode* m = map(); set_map(NULL); return m; } | |
160 | |
161 // Stop, but first smash the map's inputs to NULL, to mark it dead. | |
162 void stop_and_kill_map(); | |
163 | |
164 // Tell if _map is NULL, or control is top. | |
165 bool stopped(); | |
166 | |
167 // Tell if this method or any caller method has exception handlers. | |
168 bool has_ex_handler(); | |
169 | |
170 // Save an exception without blowing stack contents or other JVM state. | |
171 // (The extra pointer is stuck with add_req on the map, beyond the JVMS.) | |
172 static void set_saved_ex_oop(SafePointNode* ex_map, Node* ex_oop); | |
173 | |
174 // Recover a saved exception from its map. | |
175 static Node* saved_ex_oop(SafePointNode* ex_map); | |
176 | |
177 // Recover a saved exception from its map, and remove it from the map. | |
178 static Node* clear_saved_ex_oop(SafePointNode* ex_map); | |
179 | |
180 #ifdef ASSERT | |
181 // Recover a saved exception from its map, and remove it from the map. | |
182 static bool has_saved_ex_oop(SafePointNode* ex_map); | |
183 #endif | |
184 | |
185 // Push an exception in the canonical position for handlers (stack(0)). | |
186 void push_ex_oop(Node* ex_oop) { | |
187 ensure_stack(1); // ensure room to push the exception | |
188 set_stack(0, ex_oop); | |
189 set_sp(1); | |
190 clean_stack(1); | |
191 } | |
192 | |
193 // Detach and return an exception state. | |
194 SafePointNode* pop_exception_state() { | |
195 SafePointNode* ex_map = _exceptions; | |
196 if (ex_map != NULL) { | |
197 _exceptions = ex_map->next_exception(); | |
198 ex_map->set_next_exception(NULL); | |
199 debug_only(verify_exception_state(ex_map)); | |
200 } | |
201 return ex_map; | |
202 } | |
203 | |
204 // Add an exception, using the given JVM state, without commoning. | |
205 void push_exception_state(SafePointNode* ex_map) { | |
206 debug_only(verify_exception_state(ex_map)); | |
207 ex_map->set_next_exception(_exceptions); | |
208 _exceptions = ex_map; | |
209 } | |
210 | |
211 // Turn the current JVM state into an exception state, appending the ex_oop. | |
212 SafePointNode* make_exception_state(Node* ex_oop); | |
213 | |
214 // Add an exception, using the given JVM state. | |
215 // Combine all exceptions with a common exception type into a single state. | |
216 // (This is done via combine_exception_states.) | |
217 void add_exception_state(SafePointNode* ex_map); | |
218 | |
219 // Combine all exceptions of any sort whatever into a single master state. | |
220 SafePointNode* combine_and_pop_all_exception_states() { | |
221 if (_exceptions == NULL) return NULL; | |
222 SafePointNode* phi_map = pop_exception_state(); | |
223 SafePointNode* ex_map; | |
224 while ((ex_map = pop_exception_state()) != NULL) { | |
225 combine_exception_states(ex_map, phi_map); | |
226 } | |
227 return phi_map; | |
228 } | |
229 | |
230 // Combine the two exception states, building phis as necessary. | |
231 // The second argument is updated to include contributions from the first. | |
232 void combine_exception_states(SafePointNode* ex_map, SafePointNode* phi_map); | |
233 | |
234 // Reset the map to the given state. If there are any half-finished phis | |
235 // in it (created by combine_exception_states), transform them now. | |
236 // Returns the exception oop. (Caller must call push_ex_oop if required.) | |
237 Node* use_exception_state(SafePointNode* ex_map); | |
238 | |
239 // Collect exceptions from a given JVM state into my exception list. | |
240 void add_exception_states_from(JVMState* jvms); | |
241 | |
242 // Collect all raised exceptions into the current JVM state. | |
243 // Clear the current exception list and map, returns the combined states. | |
244 JVMState* transfer_exceptions_into_jvms(); | |
245 | |
246 // Helper to throw a built-in exception. | |
247 // Range checks take the offending index. | |
248 // Cast and array store checks take the offending class. | |
249 // Others do not take the optional argument. | |
250 // The JVMS must allow the bytecode to be re-executed | |
251 // via an uncommon trap. | |
252 void builtin_throw(Deoptimization::DeoptReason reason, Node* arg = NULL); | |
253 | |
254 // Helper Functions for adding debug information | |
255 void kill_dead_locals(); | |
256 #ifdef ASSERT | |
257 bool dead_locals_are_killed(); | |
258 #endif | |
259 // The call may deoptimize. Supply required JVM state as debug info. | |
260 // If must_throw is true, the call is guaranteed not to return normally. | |
261 void add_safepoint_edges(SafePointNode* call, | |
262 bool must_throw = false); | |
263 | |
264 // How many stack inputs does the current BC consume? | |
265 // And, how does the stack change after the bytecode? | |
266 // Returns false if unknown. | |
267 bool compute_stack_effects(int& inputs, int& depth); | |
268 | |
269 // Add a fixed offset to a pointer | |
270 Node* basic_plus_adr(Node* base, Node* ptr, intptr_t offset) { | |
271 return basic_plus_adr(base, ptr, MakeConX(offset)); | |
272 } | |
273 Node* basic_plus_adr(Node* base, intptr_t offset) { | |
274 return basic_plus_adr(base, base, MakeConX(offset)); | |
275 } | |
276 // Add a variable offset to a pointer | |
277 Node* basic_plus_adr(Node* base, Node* offset) { | |
278 return basic_plus_adr(base, base, offset); | |
279 } | |
280 Node* basic_plus_adr(Node* base, Node* ptr, Node* offset); | |
281 | |
282 // Convert between int and long, and size_t. | |
283 // (See macros ConvI2X, etc., in type.hpp for ConvI2X, etc.) | |
284 Node* ConvI2L(Node* offset); | |
285 Node* ConvL2I(Node* offset); | |
286 // Find out the klass of an object. | |
287 Node* load_object_klass(Node* object); | |
288 // Find out the length of an array. | |
289 Node* load_array_length(Node* array); | |
290 // Helper function to do a NULL pointer check or ZERO check based on type. | |
291 Node* null_check_common(Node* value, BasicType type, | |
292 bool assert_null, Node* *null_control); | |
293 // Throw an exception if a given value is null. | |
294 // Return the value cast to not-null. | |
295 // Be clever about equivalent dominating null checks. | |
296 Node* do_null_check(Node* value, BasicType type) { | |
297 return null_check_common(value, type, false, NULL); | |
298 } | |
299 // Throw an uncommon trap if a given value is __not__ null. | |
300 // Return the value cast to null, and be clever about dominating checks. | |
301 Node* do_null_assert(Node* value, BasicType type) { | |
302 return null_check_common(value, type, true, NULL); | |
303 } | |
304 // Null check oop. Return null-path control into (*null_control). | |
305 // Return a cast-not-null node which depends on the not-null control. | |
306 // If never_see_null, use an uncommon trap (*null_control sees a top). | |
307 // The cast is not valid along the null path; keep a copy of the original. | |
308 Node* null_check_oop(Node* value, Node* *null_control, | |
309 bool never_see_null = false); | |
310 | |
311 // Cast obj to not-null on this path | |
312 Node* cast_not_null(Node* obj, bool do_replace_in_map = true); | |
313 // Replace all occurrences of one node by another. | |
314 void replace_in_map(Node* old, Node* neww); | |
315 | |
316 void push(Node* n) { map_not_null(); _map->set_stack(_map->_jvms,_sp++,n); } | |
317 Node* pop() { map_not_null(); return _map->stack(_map->_jvms,--_sp); } | |
318 Node* peek(int off=0) { map_not_null(); return _map->stack(_map->_jvms, _sp - off - 1); } | |
319 | |
320 void push_pair(Node* ldval) { | |
321 push(ldval); | |
322 push(top()); // the halfword is merely a placeholder | |
323 } | |
324 void push_pair_local(int i) { | |
325 // longs are stored in locals in "push" order | |
326 push( local(i+0) ); // the real value | |
327 assert(local(i+1) == top(), ""); | |
328 push(top()); // halfword placeholder | |
329 } | |
330 Node* pop_pair() { | |
331 // the second half is pushed last & popped first; it contains exactly nothing | |
332 Node* halfword = pop(); | |
333 assert(halfword == top(), ""); | |
334 // the long bits are pushed first & popped last: | |
335 return pop(); | |
336 } | |
337 void set_pair_local(int i, Node* lval) { | |
338 // longs are stored in locals as a value/half pair (like doubles) | |
339 set_local(i+0, lval); | |
340 set_local(i+1, top()); | |
341 } | |
342 | |
343 // Push the node, which may be zero, one, or two words. | |
344 void push_node(BasicType n_type, Node* n) { | |
345 int n_size = type2size[n_type]; | |
346 if (n_size == 1) push( n ); // T_INT, ... | |
347 else if (n_size == 2) push_pair( n ); // T_DOUBLE, T_LONG | |
348 else { assert(n_size == 0, "must be T_VOID"); } | |
349 } | |
350 | |
351 Node* pop_node(BasicType n_type) { | |
352 int n_size = type2size[n_type]; | |
353 if (n_size == 1) return pop(); | |
354 else if (n_size == 2) return pop_pair(); | |
355 else return NULL; | |
356 } | |
357 | |
358 Node* control() const { return map_not_null()->control(); } | |
359 Node* i_o() const { return map_not_null()->i_o(); } | |
360 Node* returnadr() const { return map_not_null()->returnadr(); } | |
361 Node* frameptr() const { return map_not_null()->frameptr(); } | |
362 Node* local(uint idx) const { map_not_null(); return _map->local( _map->_jvms, idx); } | |
363 Node* stack(uint idx) const { map_not_null(); return _map->stack( _map->_jvms, idx); } | |
364 Node* argument(uint idx) const { map_not_null(); return _map->argument( _map->_jvms, idx); } | |
365 Node* monitor_box(uint idx) const { map_not_null(); return _map->monitor_box(_map->_jvms, idx); } | |
366 Node* monitor_obj(uint idx) const { map_not_null(); return _map->monitor_obj(_map->_jvms, idx); } | |
367 | |
368 void set_control (Node* c) { map_not_null()->set_control(c); } | |
369 void set_i_o (Node* c) { map_not_null()->set_i_o(c); } | |
370 void set_local(uint idx, Node* c) { map_not_null(); _map->set_local( _map->_jvms, idx, c); } | |
371 void set_stack(uint idx, Node* c) { map_not_null(); _map->set_stack( _map->_jvms, idx, c); } | |
372 void set_argument(uint idx, Node* c){ map_not_null(); _map->set_argument(_map->_jvms, idx, c); } | |
373 void ensure_stack(uint stk_size) { map_not_null(); _map->ensure_stack(_map->_jvms, stk_size); } | |
374 | |
375 // Access unaliased memory | |
376 Node* memory(uint alias_idx); | |
377 Node* memory(const TypePtr *tp) { return memory(C->get_alias_index(tp)); } | |
378 Node* memory(Node* adr) { return memory(_gvn.type(adr)->is_ptr()); } | |
379 | |
380 // Access immutable memory | |
381 Node* immutable_memory() { return C->immutable_memory(); } | |
382 | |
383 // Set unaliased memory | |
384 void set_memory(Node* c, uint alias_idx) { merged_memory()->set_memory_at(alias_idx, c); } | |
385 void set_memory(Node* c, const TypePtr *tp) { set_memory(c,C->get_alias_index(tp)); } | |
386 void set_memory(Node* c, Node* adr) { set_memory(c,_gvn.type(adr)->is_ptr()); } | |
387 | |
388 // Get the entire memory state (probably a MergeMemNode), and reset it | |
389 // (The resetting prevents somebody from using the dangling Node pointer.) | |
390 Node* reset_memory(); | |
391 | |
392 // Get the entire memory state, asserted to be a MergeMemNode. | |
393 MergeMemNode* merged_memory() { | |
394 Node* mem = map_not_null()->memory(); | |
395 assert(mem->is_MergeMem(), "parse memory is always pre-split"); | |
396 return mem->as_MergeMem(); | |
397 } | |
398 | |
399 // Set the entire memory state; produce a new MergeMemNode. | |
400 void set_all_memory(Node* newmem); | |
401 | |
402 // Create a memory projection from the call, then set_all_memory. | |
403 void set_all_memory_call(Node* call); | |
404 | |
405 // Create a LoadNode, reading from the parser's memory state. | |
406 // (Note: require_atomic_access is useful only with T_LONG.) | |
407 Node* make_load(Node* ctl, Node* adr, const Type* t, BasicType bt, | |
408 bool require_atomic_access = false) { | |
409 // This version computes alias_index from bottom_type | |
410 return make_load(ctl, adr, t, bt, adr->bottom_type()->is_ptr(), | |
411 require_atomic_access); | |
412 } | |
413 Node* make_load(Node* ctl, Node* adr, const Type* t, BasicType bt, const TypePtr* adr_type, bool require_atomic_access = false) { | |
414 // This version computes alias_index from an address type | |
415 assert(adr_type != NULL, "use other make_load factory"); | |
416 return make_load(ctl, adr, t, bt, C->get_alias_index(adr_type), | |
417 require_atomic_access); | |
418 } | |
419 // This is the base version which is given an alias index. | |
420 Node* make_load(Node* ctl, Node* adr, const Type* t, BasicType bt, int adr_idx, bool require_atomic_access = false); | |
421 | |
422 // Create & transform a StoreNode and store the effect into the | |
423 // parser's memory state. | |
424 Node* store_to_memory(Node* ctl, Node* adr, Node* val, BasicType bt, | |
425 const TypePtr* adr_type, | |
426 bool require_atomic_access = false) { | |
427 // This version computes alias_index from an address type | |
428 assert(adr_type != NULL, "use other store_to_memory factory"); | |
429 return store_to_memory(ctl, adr, val, bt, | |
430 C->get_alias_index(adr_type), | |
431 require_atomic_access); | |
432 } | |
433 // This is the base version which is given alias index | |
434 // Return the new StoreXNode | |
435 Node* store_to_memory(Node* ctl, Node* adr, Node* val, BasicType bt, | |
436 int adr_idx, | |
437 bool require_atomic_access = false); | |
438 | |
439 | |
440 // All in one pre-barrier, store, post_barrier | |
441 // Insert a write-barrier'd store. This is to let generational GC | |
442 // work; we have to flag all oop-stores before the next GC point. | |
443 // | |
444 // It comes in 3 flavors of store to an object, array, or unknown. | |
445 // We use precise card marks for arrays to avoid scanning the entire | |
446 // array. We use imprecise for object. We use precise for unknown | |
447 // since we don't know if we have an array or and object or even | |
448 // where the object starts. | |
449 // | |
450 // If val==NULL, it is taken to be a completely unknown value. QQQ | |
451 | |
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452 Node* store_oop(Node* ctl, |
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453 Node* obj, // containing obj |
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454 Node* adr, // actual adress to store val at |
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455 const TypePtr* adr_type, |
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456 Node* val, |
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457 const TypeOopPtr* val_type, |
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458 BasicType bt, |
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459 bool use_precise); |
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460 |
0 | 461 Node* store_oop_to_object(Node* ctl, |
462 Node* obj, // containing obj | |
463 Node* adr, // actual adress to store val at | |
464 const TypePtr* adr_type, | |
465 Node* val, | |
825 | 466 const TypeOopPtr* val_type, |
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467 BasicType bt) { |
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468 return store_oop(ctl, obj, adr, adr_type, val, val_type, bt, false); |
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469 } |
0 | 470 |
471 Node* store_oop_to_array(Node* ctl, | |
472 Node* obj, // containing obj | |
473 Node* adr, // actual adress to store val at | |
474 const TypePtr* adr_type, | |
475 Node* val, | |
825 | 476 const TypeOopPtr* val_type, |
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477 BasicType bt) { |
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478 return store_oop(ctl, obj, adr, adr_type, val, val_type, bt, true); |
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479 } |
0 | 480 |
481 // Could be an array or object we don't know at compile time (unsafe ref.) | |
482 Node* store_oop_to_unknown(Node* ctl, | |
483 Node* obj, // containing obj | |
484 Node* adr, // actual adress to store val at | |
485 const TypePtr* adr_type, | |
486 Node* val, | |
487 BasicType bt); | |
488 | |
489 // For the few case where the barriers need special help | |
490 void pre_barrier(Node* ctl, Node* obj, Node* adr, uint adr_idx, | |
825 | 491 Node* val, const TypeOopPtr* val_type, BasicType bt); |
0 | 492 |
493 void post_barrier(Node* ctl, Node* store, Node* obj, Node* adr, uint adr_idx, | |
494 Node* val, BasicType bt, bool use_precise); | |
495 | |
496 // Return addressing for an array element. | |
497 Node* array_element_address(Node* ary, Node* idx, BasicType elembt, | |
498 // Optional constraint on the array size: | |
499 const TypeInt* sizetype = NULL); | |
500 | |
501 // Return a load of array element at idx. | |
502 Node* load_array_element(Node* ctl, Node* ary, Node* idx, const TypeAryPtr* arytype); | |
503 | |
504 //---------------- Dtrace support -------------------- | |
505 void make_dtrace_method_entry_exit(ciMethod* method, bool is_entry); | |
506 void make_dtrace_method_entry(ciMethod* method) { | |
507 make_dtrace_method_entry_exit(method, true); | |
508 } | |
509 void make_dtrace_method_exit(ciMethod* method) { | |
510 make_dtrace_method_entry_exit(method, false); | |
511 } | |
512 | |
513 //--------------- stub generation ------------------- | |
514 public: | |
515 void gen_stub(address C_function, | |
516 const char *name, | |
517 int is_fancy_jump, | |
518 bool pass_tls, | |
519 bool return_pc); | |
520 | |
521 //---------- help for generating calls -------------- | |
522 | |
523 // Do a null check on the receiver, which is in argument(0). | |
524 Node* null_check_receiver(ciMethod* callee) { | |
525 assert(!callee->is_static(), "must be a virtual method"); | |
526 int nargs = 1 + callee->signature()->size(); | |
527 // Null check on self without removing any arguments. The argument | |
528 // null check technically happens in the wrong place, which can lead to | |
529 // invalid stack traces when the primitive is inlined into a method | |
530 // which handles NullPointerExceptions. | |
531 Node* receiver = argument(0); | |
532 _sp += nargs; | |
533 receiver = do_null_check(receiver, T_OBJECT); | |
534 _sp -= nargs; | |
535 return receiver; | |
536 } | |
537 | |
538 // Fill in argument edges for the call from argument(0), argument(1), ... | |
539 // (The next step is to call set_edges_for_java_call.) | |
540 void set_arguments_for_java_call(CallJavaNode* call); | |
541 | |
542 // Fill in non-argument edges for the call. | |
543 // Transform the call, and update the basics: control, i_o, memory. | |
544 // (The next step is usually to call set_results_for_java_call.) | |
545 void set_edges_for_java_call(CallJavaNode* call, | |
546 bool must_throw = false); | |
547 | |
548 // Finish up a java call that was started by set_edges_for_java_call. | |
549 // Call add_exception on any throw arising from the call. | |
550 // Return the call result (transformed). | |
551 Node* set_results_for_java_call(CallJavaNode* call); | |
552 | |
553 // Similar to set_edges_for_java_call, but simplified for runtime calls. | |
554 void set_predefined_output_for_runtime_call(Node* call) { | |
555 set_predefined_output_for_runtime_call(call, NULL, NULL); | |
556 } | |
557 void set_predefined_output_for_runtime_call(Node* call, | |
558 Node* keep_mem, | |
559 const TypePtr* hook_mem); | |
560 Node* set_predefined_input_for_runtime_call(SafePointNode* call); | |
561 | |
562 // helper functions for statistics | |
563 void increment_counter(address counter_addr); // increment a debug counter | |
564 void increment_counter(Node* counter_addr); // increment a debug counter | |
565 | |
566 // Bail out to the interpreter right now | |
567 // The optional klass is the one causing the trap. | |
568 // The optional reason is debug information written to the compile log. | |
569 // Optional must_throw is the same as with add_safepoint_edges. | |
570 void uncommon_trap(int trap_request, | |
571 ciKlass* klass = NULL, const char* reason_string = NULL, | |
572 bool must_throw = false, bool keep_exact_action = false); | |
573 | |
574 // Shorthand, to avoid saying "Deoptimization::" so many times. | |
575 void uncommon_trap(Deoptimization::DeoptReason reason, | |
576 Deoptimization::DeoptAction action, | |
577 ciKlass* klass = NULL, const char* reason_string = NULL, | |
578 bool must_throw = false, bool keep_exact_action = false) { | |
579 uncommon_trap(Deoptimization::make_trap_request(reason, action), | |
580 klass, reason_string, must_throw, keep_exact_action); | |
581 } | |
582 | |
583 // Report if there were too many traps at the current method and bci. | |
584 // Report if a trap was recorded, and/or PerMethodTrapLimit was exceeded. | |
585 // If there is no MDO at all, report no trap unless told to assume it. | |
586 bool too_many_traps(Deoptimization::DeoptReason reason) { | |
587 return C->too_many_traps(method(), bci(), reason); | |
588 } | |
589 | |
590 // Report if there were too many recompiles at the current method and bci. | |
591 bool too_many_recompiles(Deoptimization::DeoptReason reason) { | |
592 return C->too_many_recompiles(method(), bci(), reason); | |
593 } | |
594 | |
595 // Returns the object (if any) which was created the moment before. | |
596 Node* just_allocated_object(Node* current_control); | |
597 | |
598 static bool use_ReduceInitialCardMarks() { | |
599 return (ReduceInitialCardMarks | |
600 && Universe::heap()->can_elide_tlab_store_barriers()); | |
601 } | |
602 | |
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603 void sync_kit(IdealKit& ideal); |
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604 |
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605 // vanilla/CMS post barrier |
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606 void write_barrier_post(Node *store, Node* obj, Node* adr, Node* val, bool use_precise); |
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607 |
342 | 608 // G1 pre/post barriers |
609 void g1_write_barrier_pre(Node* obj, | |
610 Node* adr, | |
611 uint alias_idx, | |
612 Node* val, | |
825 | 613 const TypeOopPtr* val_type, |
342 | 614 BasicType bt); |
615 | |
616 void g1_write_barrier_post(Node* store, | |
617 Node* obj, | |
618 Node* adr, | |
619 uint alias_idx, | |
620 Node* val, | |
621 BasicType bt, | |
622 bool use_precise); | |
623 // Helper function for g1 | |
624 private: | |
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625 void g1_mark_card(IdealKit& ideal, Node* card_adr, Node* store, Node* index, Node* index_adr, |
342 | 626 Node* buffer, const TypeFunc* tf); |
627 | |
628 public: | |
0 | 629 // Helper function to round double arguments before a call |
630 void round_double_arguments(ciMethod* dest_method); | |
631 void round_double_result(ciMethod* dest_method); | |
632 | |
633 // rounding for strict float precision conformance | |
634 Node* precision_rounding(Node* n); | |
635 | |
636 // rounding for strict double precision conformance | |
637 Node* dprecision_rounding(Node* n); | |
638 | |
639 // rounding for non-strict double stores | |
640 Node* dstore_rounding(Node* n); | |
641 | |
642 // Helper functions for fast/slow path codes | |
643 Node* opt_iff(Node* region, Node* iff); | |
644 Node* make_runtime_call(int flags, | |
645 const TypeFunc* call_type, address call_addr, | |
646 const char* call_name, | |
647 const TypePtr* adr_type, // NULL if no memory effects | |
648 Node* parm0 = NULL, Node* parm1 = NULL, | |
649 Node* parm2 = NULL, Node* parm3 = NULL, | |
650 Node* parm4 = NULL, Node* parm5 = NULL, | |
651 Node* parm6 = NULL, Node* parm7 = NULL); | |
652 enum { // flag values for make_runtime_call | |
653 RC_NO_FP = 1, // CallLeafNoFPNode | |
654 RC_NO_IO = 2, // do not hook IO edges | |
655 RC_NO_LEAF = 4, // CallStaticJavaNode | |
656 RC_MUST_THROW = 8, // flag passed to add_safepoint_edges | |
657 RC_NARROW_MEM = 16, // input memory is same as output | |
658 RC_UNCOMMON = 32, // freq. expected to be like uncommon trap | |
659 RC_LEAF = 0 // null value: no flags set | |
660 }; | |
661 | |
662 // merge in all memory slices from new_mem, along the given path | |
663 void merge_memory(Node* new_mem, Node* region, int new_path); | |
664 void make_slow_call_ex(Node* call, ciInstanceKlass* ex_klass, bool separate_io_proj); | |
665 | |
666 // Helper functions to build synchronizations | |
667 int next_monitor(); | |
668 Node* insert_mem_bar(int opcode, Node* precedent = NULL); | |
669 Node* insert_mem_bar_volatile(int opcode, int alias_idx, Node* precedent = NULL); | |
670 // Optional 'precedent' is appended as an extra edge, to force ordering. | |
671 FastLockNode* shared_lock(Node* obj); | |
672 void shared_unlock(Node* box, Node* obj); | |
673 | |
674 // helper functions for the fast path/slow path idioms | |
675 Node* fast_and_slow(Node* in, const Type *result_type, Node* null_result, IfNode* fast_test, Node* fast_result, address slow_call, const TypeFunc *slow_call_type, Node* slow_arg, klassOop ex_klass, Node* slow_result); | |
676 | |
677 // Generate an instance-of idiom. Used by both the instance-of bytecode | |
678 // and the reflective instance-of call. | |
679 Node* gen_instanceof( Node *subobj, Node* superkls ); | |
680 | |
681 // Generate a check-cast idiom. Used by both the check-cast bytecode | |
682 // and the array-store bytecode | |
683 Node* gen_checkcast( Node *subobj, Node* superkls, | |
684 Node* *failure_control = NULL ); | |
685 | |
686 // Generate a subtyping check. Takes as input the subtype and supertype. | |
687 // Returns 2 values: sets the default control() to the true path and | |
688 // returns the false path. Only reads from constant memory taken from the | |
689 // default memory; does not write anything. It also doesn't take in an | |
690 // Object; if you wish to check an Object you need to load the Object's | |
691 // class prior to coming here. | |
692 Node* gen_subtype_check(Node* subklass, Node* superklass); | |
693 | |
694 // Static parse-time type checking logic for gen_subtype_check: | |
695 enum { SSC_always_false, SSC_always_true, SSC_easy_test, SSC_full_test }; | |
696 int static_subtype_check(ciKlass* superk, ciKlass* subk); | |
697 | |
698 // Exact type check used for predicted calls and casts. | |
699 // Rewrites (*casted_receiver) to be casted to the stronger type. | |
700 // (Caller is responsible for doing replace_in_map.) | |
701 Node* type_check_receiver(Node* receiver, ciKlass* klass, float prob, | |
702 Node* *casted_receiver); | |
703 | |
704 // implementation of object creation | |
705 Node* set_output_for_allocation(AllocateNode* alloc, | |
706 const TypeOopPtr* oop_type, | |
707 bool raw_mem_only); | |
708 Node* get_layout_helper(Node* klass_node, jint& constant_value); | |
709 Node* new_instance(Node* klass_node, | |
710 Node* slow_test = NULL, | |
711 bool raw_mem_only = false, | |
712 Node* *return_size_val = NULL); | |
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713 Node* new_array(Node* klass_node, Node* count_val, int nargs, |
0 | 714 bool raw_mem_only = false, Node* *return_size_val = NULL); |
715 | |
716 // Handy for making control flow | |
717 IfNode* create_and_map_if(Node* ctrl, Node* tst, float prob, float cnt) { | |
718 IfNode* iff = new (C, 2) IfNode(ctrl, tst, prob, cnt);// New IfNode's | |
719 _gvn.set_type(iff, iff->Value(&_gvn)); // Value may be known at parse-time | |
720 // Place 'if' on worklist if it will be in graph | |
721 if (!tst->is_Con()) record_for_igvn(iff); // Range-check and Null-check removal is later | |
722 return iff; | |
723 } | |
724 | |
725 IfNode* create_and_xform_if(Node* ctrl, Node* tst, float prob, float cnt) { | |
726 IfNode* iff = new (C, 2) IfNode(ctrl, tst, prob, cnt);// New IfNode's | |
727 _gvn.transform(iff); // Value may be known at parse-time | |
728 // Place 'if' on worklist if it will be in graph | |
729 if (!tst->is_Con()) record_for_igvn(iff); // Range-check and Null-check removal is later | |
730 return iff; | |
731 } | |
732 }; | |
733 | |
734 // Helper class to support building of control flow branches. Upon | |
735 // creation the map and sp at bci are cloned and restored upon de- | |
736 // struction. Typical use: | |
737 // | |
738 // { PreserveJVMState pjvms(this); | |
739 // // code of new branch | |
740 // } | |
741 // // here the JVM state at bci is established | |
742 | |
743 class PreserveJVMState: public StackObj { | |
744 protected: | |
745 GraphKit* _kit; | |
746 #ifdef ASSERT | |
747 int _block; // PO of current block, if a Parse | |
748 int _bci; | |
749 #endif | |
750 SafePointNode* _map; | |
751 uint _sp; | |
752 | |
753 public: | |
754 PreserveJVMState(GraphKit* kit, bool clone_map = true); | |
755 ~PreserveJVMState(); | |
756 }; | |
757 | |
758 // Helper class to build cutouts of the form if (p) ; else {x...}. | |
759 // The code {x...} must not fall through. | |
760 // The kit's main flow of control is set to the "then" continuation of if(p). | |
761 class BuildCutout: public PreserveJVMState { | |
762 public: | |
763 BuildCutout(GraphKit* kit, Node* p, float prob, float cnt = COUNT_UNKNOWN); | |
764 ~BuildCutout(); | |
765 }; | |
900
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766 |
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767 // Helper class to preserve the original _reexecute bit and _sp and restore |
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768 // them back |
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769 class PreserveReexecuteState: public StackObj { |
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770 protected: |
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771 GraphKit* _kit; |
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772 uint _sp; |
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773 JVMState::ReexecuteState _reexecute; |
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774 |
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775 public: |
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776 PreserveReexecuteState(GraphKit* kit); |
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777 ~PreserveReexecuteState(); |
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778 }; |