|
1 /* |
|
2 * Copyright 2001-2007 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 class FastLockNode; |
|
26 class FastUnlockNode; |
|
27 class Parse; |
|
28 class RootNode; |
|
29 |
|
30 //----------------------------------------------------------------------------- |
|
31 //----------------------------GraphKit----------------------------------------- |
|
32 // Toolkit for building the common sorts of subgraphs. |
|
33 // Does not know about bytecode parsing or type-flow results. |
|
34 // It is able to create graphs implementing the semantics of most |
|
35 // or all bytecodes, so that it can expand intrinsics and calls. |
|
36 // It may depend on JVMState structure, but it must not depend |
|
37 // on specific bytecode streams. |
|
38 class GraphKit : public Phase { |
|
39 friend class PreserveJVMState; |
|
40 |
|
41 protected: |
|
42 ciEnv* _env; // Compilation environment |
|
43 PhaseGVN &_gvn; // Some optimizations while parsing |
|
44 SafePointNode* _map; // Parser map from JVM to Nodes |
|
45 SafePointNode* _exceptions;// Parser map(s) for exception state(s) |
|
46 int _sp; // JVM Expression Stack Pointer |
|
47 int _bci; // JVM Bytecode Pointer |
|
48 ciMethod* _method; // JVM Current Method |
|
49 |
|
50 private: |
|
51 SafePointNode* map_not_null() const { |
|
52 assert(_map != NULL, "must call stopped() to test for reset compiler map"); |
|
53 return _map; |
|
54 } |
|
55 |
|
56 public: |
|
57 GraphKit(); // empty constructor |
|
58 GraphKit(JVMState* jvms); // the JVM state on which to operate |
|
59 |
|
60 #ifdef ASSERT |
|
61 ~GraphKit() { |
|
62 assert(!has_exceptions(), "user must call transfer_exceptions_into_jvms"); |
|
63 } |
|
64 #endif |
|
65 |
|
66 virtual Parse* is_Parse() const { return NULL; } |
|
67 |
|
68 ciEnv* env() const { return _env; } |
|
69 PhaseGVN& gvn() const { return _gvn; } |
|
70 |
|
71 void record_for_igvn(Node* n) const { C->record_for_igvn(n); } // delegate to Compile |
|
72 |
|
73 // Handy well-known nodes: |
|
74 Node* null() const { return zerocon(T_OBJECT); } |
|
75 Node* top() const { return C->top(); } |
|
76 RootNode* root() const { return C->root(); } |
|
77 |
|
78 // Create or find a constant node |
|
79 Node* intcon(jint con) const { return _gvn.intcon(con); } |
|
80 Node* longcon(jlong con) const { return _gvn.longcon(con); } |
|
81 Node* makecon(const Type *t) const { return _gvn.makecon(t); } |
|
82 Node* zerocon(BasicType bt) const { return _gvn.zerocon(bt); } |
|
83 // (See also macro MakeConX in type.hpp, which uses intcon or longcon.) |
|
84 |
|
85 jint find_int_con(Node* n, jint value_if_unknown) { |
|
86 return _gvn.find_int_con(n, value_if_unknown); |
|
87 } |
|
88 jlong find_long_con(Node* n, jlong value_if_unknown) { |
|
89 return _gvn.find_long_con(n, value_if_unknown); |
|
90 } |
|
91 // (See also macro find_intptr_t_con in type.hpp, which uses one of these.) |
|
92 |
|
93 // JVM State accessors: |
|
94 // Parser mapping from JVM indices into Nodes. |
|
95 // Low slots are accessed by the StartNode::enum. |
|
96 // Then come the locals at StartNode::Parms to StartNode::Parms+max_locals(); |
|
97 // Then come JVM stack slots. |
|
98 // Finally come the monitors, if any. |
|
99 // See layout accessors in class JVMState. |
|
100 |
|
101 SafePointNode* map() const { return _map; } |
|
102 bool has_exceptions() const { return _exceptions != NULL; } |
|
103 JVMState* jvms() const { return map_not_null()->_jvms; } |
|
104 int sp() const { return _sp; } |
|
105 int bci() const { return _bci; } |
|
106 Bytecodes::Code java_bc() const; |
|
107 ciMethod* method() const { return _method; } |
|
108 |
|
109 void set_jvms(JVMState* jvms) { set_map(jvms->map()); |
|
110 assert(jvms == this->jvms(), "sanity"); |
|
111 _sp = jvms->sp(); |
|
112 _bci = jvms->bci(); |
|
113 _method = jvms->has_method() ? jvms->method() : NULL; } |
|
114 void set_map(SafePointNode* m) { _map = m; debug_only(verify_map()); } |
|
115 void set_sp(int i) { assert(i >= 0, "must be non-negative"); _sp = i; } |
|
116 void clean_stack(int from_sp); // clear garbage beyond from_sp to top |
|
117 |
|
118 void inc_sp(int i) { set_sp(sp() + i); } |
|
119 void set_bci(int bci) { _bci = bci; } |
|
120 |
|
121 // Make sure jvms has current bci & sp. |
|
122 JVMState* sync_jvms() const; |
|
123 #ifdef ASSERT |
|
124 // Make sure JVMS has an updated copy of bci and sp. |
|
125 // Also sanity-check method, depth, and monitor depth. |
|
126 bool jvms_in_sync() const; |
|
127 |
|
128 // Make sure the map looks OK. |
|
129 void verify_map() const; |
|
130 |
|
131 // Make sure a proposed exception state looks OK. |
|
132 static void verify_exception_state(SafePointNode* ex_map); |
|
133 #endif |
|
134 |
|
135 // Clone the existing map state. (Implements PreserveJVMState.) |
|
136 SafePointNode* clone_map(); |
|
137 |
|
138 // Set the map to a clone of the given one. |
|
139 void set_map_clone(SafePointNode* m); |
|
140 |
|
141 // Tell if the compilation is failing. |
|
142 bool failing() const { return C->failing(); } |
|
143 |
|
144 // Set _map to NULL, signalling a stop to further bytecode execution. |
|
145 // Preserve the map intact for future use, and return it back to the caller. |
|
146 SafePointNode* stop() { SafePointNode* m = map(); set_map(NULL); return m; } |
|
147 |
|
148 // Stop, but first smash the map's inputs to NULL, to mark it dead. |
|
149 void stop_and_kill_map(); |
|
150 |
|
151 // Tell if _map is NULL, or control is top. |
|
152 bool stopped(); |
|
153 |
|
154 // Tell if this method or any caller method has exception handlers. |
|
155 bool has_ex_handler(); |
|
156 |
|
157 // Save an exception without blowing stack contents or other JVM state. |
|
158 // (The extra pointer is stuck with add_req on the map, beyond the JVMS.) |
|
159 static void set_saved_ex_oop(SafePointNode* ex_map, Node* ex_oop); |
|
160 |
|
161 // Recover a saved exception from its map. |
|
162 static Node* saved_ex_oop(SafePointNode* ex_map); |
|
163 |
|
164 // Recover a saved exception from its map, and remove it from the map. |
|
165 static Node* clear_saved_ex_oop(SafePointNode* ex_map); |
|
166 |
|
167 #ifdef ASSERT |
|
168 // Recover a saved exception from its map, and remove it from the map. |
|
169 static bool has_saved_ex_oop(SafePointNode* ex_map); |
|
170 #endif |
|
171 |
|
172 // Push an exception in the canonical position for handlers (stack(0)). |
|
173 void push_ex_oop(Node* ex_oop) { |
|
174 ensure_stack(1); // ensure room to push the exception |
|
175 set_stack(0, ex_oop); |
|
176 set_sp(1); |
|
177 clean_stack(1); |
|
178 } |
|
179 |
|
180 // Detach and return an exception state. |
|
181 SafePointNode* pop_exception_state() { |
|
182 SafePointNode* ex_map = _exceptions; |
|
183 if (ex_map != NULL) { |
|
184 _exceptions = ex_map->next_exception(); |
|
185 ex_map->set_next_exception(NULL); |
|
186 debug_only(verify_exception_state(ex_map)); |
|
187 } |
|
188 return ex_map; |
|
189 } |
|
190 |
|
191 // Add an exception, using the given JVM state, without commoning. |
|
192 void push_exception_state(SafePointNode* ex_map) { |
|
193 debug_only(verify_exception_state(ex_map)); |
|
194 ex_map->set_next_exception(_exceptions); |
|
195 _exceptions = ex_map; |
|
196 } |
|
197 |
|
198 // Turn the current JVM state into an exception state, appending the ex_oop. |
|
199 SafePointNode* make_exception_state(Node* ex_oop); |
|
200 |
|
201 // Add an exception, using the given JVM state. |
|
202 // Combine all exceptions with a common exception type into a single state. |
|
203 // (This is done via combine_exception_states.) |
|
204 void add_exception_state(SafePointNode* ex_map); |
|
205 |
|
206 // Combine all exceptions of any sort whatever into a single master state. |
|
207 SafePointNode* combine_and_pop_all_exception_states() { |
|
208 if (_exceptions == NULL) return NULL; |
|
209 SafePointNode* phi_map = pop_exception_state(); |
|
210 SafePointNode* ex_map; |
|
211 while ((ex_map = pop_exception_state()) != NULL) { |
|
212 combine_exception_states(ex_map, phi_map); |
|
213 } |
|
214 return phi_map; |
|
215 } |
|
216 |
|
217 // Combine the two exception states, building phis as necessary. |
|
218 // The second argument is updated to include contributions from the first. |
|
219 void combine_exception_states(SafePointNode* ex_map, SafePointNode* phi_map); |
|
220 |
|
221 // Reset the map to the given state. If there are any half-finished phis |
|
222 // in it (created by combine_exception_states), transform them now. |
|
223 // Returns the exception oop. (Caller must call push_ex_oop if required.) |
|
224 Node* use_exception_state(SafePointNode* ex_map); |
|
225 |
|
226 // Collect exceptions from a given JVM state into my exception list. |
|
227 void add_exception_states_from(JVMState* jvms); |
|
228 |
|
229 // Collect all raised exceptions into the current JVM state. |
|
230 // Clear the current exception list and map, returns the combined states. |
|
231 JVMState* transfer_exceptions_into_jvms(); |
|
232 |
|
233 // Helper to throw a built-in exception. |
|
234 // Range checks take the offending index. |
|
235 // Cast and array store checks take the offending class. |
|
236 // Others do not take the optional argument. |
|
237 // The JVMS must allow the bytecode to be re-executed |
|
238 // via an uncommon trap. |
|
239 void builtin_throw(Deoptimization::DeoptReason reason, Node* arg = NULL); |
|
240 |
|
241 // Helper Functions for adding debug information |
|
242 void kill_dead_locals(); |
|
243 #ifdef ASSERT |
|
244 bool dead_locals_are_killed(); |
|
245 #endif |
|
246 // The call may deoptimize. Supply required JVM state as debug info. |
|
247 // If must_throw is true, the call is guaranteed not to return normally. |
|
248 void add_safepoint_edges(SafePointNode* call, |
|
249 bool must_throw = false); |
|
250 |
|
251 // How many stack inputs does the current BC consume? |
|
252 // And, how does the stack change after the bytecode? |
|
253 // Returns false if unknown. |
|
254 bool compute_stack_effects(int& inputs, int& depth); |
|
255 |
|
256 // Add a fixed offset to a pointer |
|
257 Node* basic_plus_adr(Node* base, Node* ptr, intptr_t offset) { |
|
258 return basic_plus_adr(base, ptr, MakeConX(offset)); |
|
259 } |
|
260 Node* basic_plus_adr(Node* base, intptr_t offset) { |
|
261 return basic_plus_adr(base, base, MakeConX(offset)); |
|
262 } |
|
263 // Add a variable offset to a pointer |
|
264 Node* basic_plus_adr(Node* base, Node* offset) { |
|
265 return basic_plus_adr(base, base, offset); |
|
266 } |
|
267 Node* basic_plus_adr(Node* base, Node* ptr, Node* offset); |
|
268 |
|
269 // Convert between int and long, and size_t. |
|
270 // (See macros ConvI2X, etc., in type.hpp for ConvI2X, etc.) |
|
271 Node* ConvI2L(Node* offset); |
|
272 Node* ConvL2I(Node* offset); |
|
273 // Find out the klass of an object. |
|
274 Node* load_object_klass(Node* object); |
|
275 // Find out the length of an array. |
|
276 Node* load_array_length(Node* array); |
|
277 // Helper function to do a NULL pointer check or ZERO check based on type. |
|
278 Node* null_check_common(Node* value, BasicType type, |
|
279 bool assert_null, Node* *null_control); |
|
280 // Throw an exception if a given value is null. |
|
281 // Return the value cast to not-null. |
|
282 // Be clever about equivalent dominating null checks. |
|
283 Node* do_null_check(Node* value, BasicType type) { |
|
284 return null_check_common(value, type, false, NULL); |
|
285 } |
|
286 // Throw an uncommon trap if a given value is __not__ null. |
|
287 // Return the value cast to null, and be clever about dominating checks. |
|
288 Node* do_null_assert(Node* value, BasicType type) { |
|
289 return null_check_common(value, type, true, NULL); |
|
290 } |
|
291 // Null check oop. Return null-path control into (*null_control). |
|
292 // Return a cast-not-null node which depends on the not-null control. |
|
293 // If never_see_null, use an uncommon trap (*null_control sees a top). |
|
294 // The cast is not valid along the null path; keep a copy of the original. |
|
295 Node* null_check_oop(Node* value, Node* *null_control, |
|
296 bool never_see_null = false); |
|
297 |
|
298 // Cast obj to not-null on this path |
|
299 Node* cast_not_null(Node* obj, bool do_replace_in_map = true); |
|
300 // Replace all occurrences of one node by another. |
|
301 void replace_in_map(Node* old, Node* neww); |
|
302 |
|
303 void push(Node* n) { map_not_null(); _map->set_stack(_map->_jvms,_sp++,n); } |
|
304 Node* pop() { map_not_null(); return _map->stack(_map->_jvms,--_sp); } |
|
305 Node* peek(int off=0) { map_not_null(); return _map->stack(_map->_jvms, _sp - off - 1); } |
|
306 |
|
307 void push_pair(Node* ldval) { |
|
308 push(ldval); |
|
309 push(top()); // the halfword is merely a placeholder |
|
310 } |
|
311 void push_pair_local(int i) { |
|
312 // longs are stored in locals in "push" order |
|
313 push( local(i+0) ); // the real value |
|
314 assert(local(i+1) == top(), ""); |
|
315 push(top()); // halfword placeholder |
|
316 } |
|
317 Node* pop_pair() { |
|
318 // the second half is pushed last & popped first; it contains exactly nothing |
|
319 Node* halfword = pop(); |
|
320 assert(halfword == top(), ""); |
|
321 // the long bits are pushed first & popped last: |
|
322 return pop(); |
|
323 } |
|
324 void set_pair_local(int i, Node* lval) { |
|
325 // longs are stored in locals as a value/half pair (like doubles) |
|
326 set_local(i+0, lval); |
|
327 set_local(i+1, top()); |
|
328 } |
|
329 |
|
330 // Push the node, which may be zero, one, or two words. |
|
331 void push_node(BasicType n_type, Node* n) { |
|
332 int n_size = type2size[n_type]; |
|
333 if (n_size == 1) push( n ); // T_INT, ... |
|
334 else if (n_size == 2) push_pair( n ); // T_DOUBLE, T_LONG |
|
335 else { assert(n_size == 0, "must be T_VOID"); } |
|
336 } |
|
337 |
|
338 Node* pop_node(BasicType n_type) { |
|
339 int n_size = type2size[n_type]; |
|
340 if (n_size == 1) return pop(); |
|
341 else if (n_size == 2) return pop_pair(); |
|
342 else return NULL; |
|
343 } |
|
344 |
|
345 Node* control() const { return map_not_null()->control(); } |
|
346 Node* i_o() const { return map_not_null()->i_o(); } |
|
347 Node* returnadr() const { return map_not_null()->returnadr(); } |
|
348 Node* frameptr() const { return map_not_null()->frameptr(); } |
|
349 Node* local(uint idx) const { map_not_null(); return _map->local( _map->_jvms, idx); } |
|
350 Node* stack(uint idx) const { map_not_null(); return _map->stack( _map->_jvms, idx); } |
|
351 Node* argument(uint idx) const { map_not_null(); return _map->argument( _map->_jvms, idx); } |
|
352 Node* monitor_box(uint idx) const { map_not_null(); return _map->monitor_box(_map->_jvms, idx); } |
|
353 Node* monitor_obj(uint idx) const { map_not_null(); return _map->monitor_obj(_map->_jvms, idx); } |
|
354 |
|
355 void set_control (Node* c) { map_not_null()->set_control(c); } |
|
356 void set_i_o (Node* c) { map_not_null()->set_i_o(c); } |
|
357 void set_local(uint idx, Node* c) { map_not_null(); _map->set_local( _map->_jvms, idx, c); } |
|
358 void set_stack(uint idx, Node* c) { map_not_null(); _map->set_stack( _map->_jvms, idx, c); } |
|
359 void set_argument(uint idx, Node* c){ map_not_null(); _map->set_argument(_map->_jvms, idx, c); } |
|
360 void ensure_stack(uint stk_size) { map_not_null(); _map->ensure_stack(_map->_jvms, stk_size); } |
|
361 |
|
362 // Access unaliased memory |
|
363 Node* memory(uint alias_idx); |
|
364 Node* memory(const TypePtr *tp) { return memory(C->get_alias_index(tp)); } |
|
365 Node* memory(Node* adr) { return memory(_gvn.type(adr)->is_ptr()); } |
|
366 |
|
367 // Access immutable memory |
|
368 Node* immutable_memory() { return C->immutable_memory(); } |
|
369 |
|
370 // Set unaliased memory |
|
371 void set_memory(Node* c, uint alias_idx) { merged_memory()->set_memory_at(alias_idx, c); } |
|
372 void set_memory(Node* c, const TypePtr *tp) { set_memory(c,C->get_alias_index(tp)); } |
|
373 void set_memory(Node* c, Node* adr) { set_memory(c,_gvn.type(adr)->is_ptr()); } |
|
374 |
|
375 // Get the entire memory state (probably a MergeMemNode), and reset it |
|
376 // (The resetting prevents somebody from using the dangling Node pointer.) |
|
377 Node* reset_memory(); |
|
378 |
|
379 // Get the entire memory state, asserted to be a MergeMemNode. |
|
380 MergeMemNode* merged_memory() { |
|
381 Node* mem = map_not_null()->memory(); |
|
382 assert(mem->is_MergeMem(), "parse memory is always pre-split"); |
|
383 return mem->as_MergeMem(); |
|
384 } |
|
385 |
|
386 // Set the entire memory state; produce a new MergeMemNode. |
|
387 void set_all_memory(Node* newmem); |
|
388 |
|
389 // Create a memory projection from the call, then set_all_memory. |
|
390 void set_all_memory_call(Node* call); |
|
391 |
|
392 // Create a LoadNode, reading from the parser's memory state. |
|
393 // (Note: require_atomic_access is useful only with T_LONG.) |
|
394 Node* make_load(Node* ctl, Node* adr, const Type* t, BasicType bt, |
|
395 bool require_atomic_access = false) { |
|
396 // This version computes alias_index from bottom_type |
|
397 return make_load(ctl, adr, t, bt, adr->bottom_type()->is_ptr(), |
|
398 require_atomic_access); |
|
399 } |
|
400 Node* make_load(Node* ctl, Node* adr, const Type* t, BasicType bt, const TypePtr* adr_type, bool require_atomic_access = false) { |
|
401 // This version computes alias_index from an address type |
|
402 assert(adr_type != NULL, "use other make_load factory"); |
|
403 return make_load(ctl, adr, t, bt, C->get_alias_index(adr_type), |
|
404 require_atomic_access); |
|
405 } |
|
406 // This is the base version which is given an alias index. |
|
407 Node* make_load(Node* ctl, Node* adr, const Type* t, BasicType bt, int adr_idx, bool require_atomic_access = false); |
|
408 |
|
409 // Create & transform a StoreNode and store the effect into the |
|
410 // parser's memory state. |
|
411 Node* store_to_memory(Node* ctl, Node* adr, Node* val, BasicType bt, |
|
412 const TypePtr* adr_type, |
|
413 bool require_atomic_access = false) { |
|
414 // This version computes alias_index from an address type |
|
415 assert(adr_type != NULL, "use other store_to_memory factory"); |
|
416 return store_to_memory(ctl, adr, val, bt, |
|
417 C->get_alias_index(adr_type), |
|
418 require_atomic_access); |
|
419 } |
|
420 // This is the base version which is given alias index |
|
421 // Return the new StoreXNode |
|
422 Node* store_to_memory(Node* ctl, Node* adr, Node* val, BasicType bt, |
|
423 int adr_idx, |
|
424 bool require_atomic_access = false); |
|
425 |
|
426 |
|
427 // All in one pre-barrier, store, post_barrier |
|
428 // Insert a write-barrier'd store. This is to let generational GC |
|
429 // work; we have to flag all oop-stores before the next GC point. |
|
430 // |
|
431 // It comes in 3 flavors of store to an object, array, or unknown. |
|
432 // We use precise card marks for arrays to avoid scanning the entire |
|
433 // array. We use imprecise for object. We use precise for unknown |
|
434 // since we don't know if we have an array or and object or even |
|
435 // where the object starts. |
|
436 // |
|
437 // If val==NULL, it is taken to be a completely unknown value. QQQ |
|
438 |
|
439 Node* store_oop_to_object(Node* ctl, |
|
440 Node* obj, // containing obj |
|
441 Node* adr, // actual adress to store val at |
|
442 const TypePtr* adr_type, |
|
443 Node* val, |
|
444 const Type* val_type, |
|
445 BasicType bt); |
|
446 |
|
447 Node* store_oop_to_array(Node* ctl, |
|
448 Node* obj, // containing obj |
|
449 Node* adr, // actual adress to store val at |
|
450 const TypePtr* adr_type, |
|
451 Node* val, |
|
452 const Type* val_type, |
|
453 BasicType bt); |
|
454 |
|
455 // Could be an array or object we don't know at compile time (unsafe ref.) |
|
456 Node* store_oop_to_unknown(Node* ctl, |
|
457 Node* obj, // containing obj |
|
458 Node* adr, // actual adress to store val at |
|
459 const TypePtr* adr_type, |
|
460 Node* val, |
|
461 const Type* val_type, |
|
462 BasicType bt); |
|
463 |
|
464 // For the few case where the barriers need special help |
|
465 void pre_barrier(Node* ctl, Node* obj, Node* adr, uint adr_idx, |
|
466 Node* val, const Type* val_type, BasicType bt); |
|
467 |
|
468 void post_barrier(Node* ctl, Node* store, Node* obj, Node* adr, uint adr_idx, |
|
469 Node* val, BasicType bt, bool use_precise); |
|
470 |
|
471 // Return addressing for an array element. |
|
472 Node* array_element_address(Node* ary, Node* idx, BasicType elembt, |
|
473 // Optional constraint on the array size: |
|
474 const TypeInt* sizetype = NULL); |
|
475 |
|
476 // Return a load of array element at idx. |
|
477 Node* load_array_element(Node* ctl, Node* ary, Node* idx, const TypeAryPtr* arytype); |
|
478 |
|
479 // CMS card-marks have an input from the corresponding oop_store |
|
480 void cms_card_mark(Node* ctl, Node* adr, Node* val, Node* oop_store); |
|
481 |
|
482 //---------------- Dtrace support -------------------- |
|
483 void make_dtrace_method_entry_exit(ciMethod* method, bool is_entry); |
|
484 void make_dtrace_method_entry(ciMethod* method) { |
|
485 make_dtrace_method_entry_exit(method, true); |
|
486 } |
|
487 void make_dtrace_method_exit(ciMethod* method) { |
|
488 make_dtrace_method_entry_exit(method, false); |
|
489 } |
|
490 |
|
491 //--------------- stub generation ------------------- |
|
492 public: |
|
493 void gen_stub(address C_function, |
|
494 const char *name, |
|
495 int is_fancy_jump, |
|
496 bool pass_tls, |
|
497 bool return_pc); |
|
498 |
|
499 //---------- help for generating calls -------------- |
|
500 |
|
501 // Do a null check on the receiver, which is in argument(0). |
|
502 Node* null_check_receiver(ciMethod* callee) { |
|
503 assert(!callee->is_static(), "must be a virtual method"); |
|
504 int nargs = 1 + callee->signature()->size(); |
|
505 // Null check on self without removing any arguments. The argument |
|
506 // null check technically happens in the wrong place, which can lead to |
|
507 // invalid stack traces when the primitive is inlined into a method |
|
508 // which handles NullPointerExceptions. |
|
509 Node* receiver = argument(0); |
|
510 _sp += nargs; |
|
511 receiver = do_null_check(receiver, T_OBJECT); |
|
512 _sp -= nargs; |
|
513 return receiver; |
|
514 } |
|
515 |
|
516 // Fill in argument edges for the call from argument(0), argument(1), ... |
|
517 // (The next step is to call set_edges_for_java_call.) |
|
518 void set_arguments_for_java_call(CallJavaNode* call); |
|
519 |
|
520 // Fill in non-argument edges for the call. |
|
521 // Transform the call, and update the basics: control, i_o, memory. |
|
522 // (The next step is usually to call set_results_for_java_call.) |
|
523 void set_edges_for_java_call(CallJavaNode* call, |
|
524 bool must_throw = false); |
|
525 |
|
526 // Finish up a java call that was started by set_edges_for_java_call. |
|
527 // Call add_exception on any throw arising from the call. |
|
528 // Return the call result (transformed). |
|
529 Node* set_results_for_java_call(CallJavaNode* call); |
|
530 |
|
531 // Similar to set_edges_for_java_call, but simplified for runtime calls. |
|
532 void set_predefined_output_for_runtime_call(Node* call) { |
|
533 set_predefined_output_for_runtime_call(call, NULL, NULL); |
|
534 } |
|
535 void set_predefined_output_for_runtime_call(Node* call, |
|
536 Node* keep_mem, |
|
537 const TypePtr* hook_mem); |
|
538 Node* set_predefined_input_for_runtime_call(SafePointNode* call); |
|
539 |
|
540 // helper functions for statistics |
|
541 void increment_counter(address counter_addr); // increment a debug counter |
|
542 void increment_counter(Node* counter_addr); // increment a debug counter |
|
543 |
|
544 // Bail out to the interpreter right now |
|
545 // The optional klass is the one causing the trap. |
|
546 // The optional reason is debug information written to the compile log. |
|
547 // Optional must_throw is the same as with add_safepoint_edges. |
|
548 void uncommon_trap(int trap_request, |
|
549 ciKlass* klass = NULL, const char* reason_string = NULL, |
|
550 bool must_throw = false, bool keep_exact_action = false); |
|
551 |
|
552 // Shorthand, to avoid saying "Deoptimization::" so many times. |
|
553 void uncommon_trap(Deoptimization::DeoptReason reason, |
|
554 Deoptimization::DeoptAction action, |
|
555 ciKlass* klass = NULL, const char* reason_string = NULL, |
|
556 bool must_throw = false, bool keep_exact_action = false) { |
|
557 uncommon_trap(Deoptimization::make_trap_request(reason, action), |
|
558 klass, reason_string, must_throw, keep_exact_action); |
|
559 } |
|
560 |
|
561 // Report if there were too many traps at the current method and bci. |
|
562 // Report if a trap was recorded, and/or PerMethodTrapLimit was exceeded. |
|
563 // If there is no MDO at all, report no trap unless told to assume it. |
|
564 bool too_many_traps(Deoptimization::DeoptReason reason) { |
|
565 return C->too_many_traps(method(), bci(), reason); |
|
566 } |
|
567 |
|
568 // Report if there were too many recompiles at the current method and bci. |
|
569 bool too_many_recompiles(Deoptimization::DeoptReason reason) { |
|
570 return C->too_many_recompiles(method(), bci(), reason); |
|
571 } |
|
572 |
|
573 // vanilla/CMS post barrier |
|
574 void write_barrier_post(Node *store, Node* obj, Node* adr, Node* val, bool use_precise); |
|
575 |
|
576 // Returns the object (if any) which was created the moment before. |
|
577 Node* just_allocated_object(Node* current_control); |
|
578 |
|
579 static bool use_ReduceInitialCardMarks() { |
|
580 return (ReduceInitialCardMarks |
|
581 && Universe::heap()->can_elide_tlab_store_barriers()); |
|
582 } |
|
583 |
|
584 // Helper function to round double arguments before a call |
|
585 void round_double_arguments(ciMethod* dest_method); |
|
586 void round_double_result(ciMethod* dest_method); |
|
587 |
|
588 // rounding for strict float precision conformance |
|
589 Node* precision_rounding(Node* n); |
|
590 |
|
591 // rounding for strict double precision conformance |
|
592 Node* dprecision_rounding(Node* n); |
|
593 |
|
594 // rounding for non-strict double stores |
|
595 Node* dstore_rounding(Node* n); |
|
596 |
|
597 // Helper functions for fast/slow path codes |
|
598 Node* opt_iff(Node* region, Node* iff); |
|
599 Node* make_runtime_call(int flags, |
|
600 const TypeFunc* call_type, address call_addr, |
|
601 const char* call_name, |
|
602 const TypePtr* adr_type, // NULL if no memory effects |
|
603 Node* parm0 = NULL, Node* parm1 = NULL, |
|
604 Node* parm2 = NULL, Node* parm3 = NULL, |
|
605 Node* parm4 = NULL, Node* parm5 = NULL, |
|
606 Node* parm6 = NULL, Node* parm7 = NULL); |
|
607 enum { // flag values for make_runtime_call |
|
608 RC_NO_FP = 1, // CallLeafNoFPNode |
|
609 RC_NO_IO = 2, // do not hook IO edges |
|
610 RC_NO_LEAF = 4, // CallStaticJavaNode |
|
611 RC_MUST_THROW = 8, // flag passed to add_safepoint_edges |
|
612 RC_NARROW_MEM = 16, // input memory is same as output |
|
613 RC_UNCOMMON = 32, // freq. expected to be like uncommon trap |
|
614 RC_LEAF = 0 // null value: no flags set |
|
615 }; |
|
616 |
|
617 // merge in all memory slices from new_mem, along the given path |
|
618 void merge_memory(Node* new_mem, Node* region, int new_path); |
|
619 void make_slow_call_ex(Node* call, ciInstanceKlass* ex_klass, bool separate_io_proj); |
|
620 |
|
621 // Helper functions to build synchronizations |
|
622 int next_monitor(); |
|
623 Node* insert_mem_bar(int opcode, Node* precedent = NULL); |
|
624 Node* insert_mem_bar_volatile(int opcode, int alias_idx, Node* precedent = NULL); |
|
625 // Optional 'precedent' is appended as an extra edge, to force ordering. |
|
626 FastLockNode* shared_lock(Node* obj); |
|
627 void shared_unlock(Node* box, Node* obj); |
|
628 |
|
629 // helper functions for the fast path/slow path idioms |
|
630 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); |
|
631 |
|
632 // Generate an instance-of idiom. Used by both the instance-of bytecode |
|
633 // and the reflective instance-of call. |
|
634 Node* gen_instanceof( Node *subobj, Node* superkls ); |
|
635 |
|
636 // Generate a check-cast idiom. Used by both the check-cast bytecode |
|
637 // and the array-store bytecode |
|
638 Node* gen_checkcast( Node *subobj, Node* superkls, |
|
639 Node* *failure_control = NULL ); |
|
640 |
|
641 // Generate a subtyping check. Takes as input the subtype and supertype. |
|
642 // Returns 2 values: sets the default control() to the true path and |
|
643 // returns the false path. Only reads from constant memory taken from the |
|
644 // default memory; does not write anything. It also doesn't take in an |
|
645 // Object; if you wish to check an Object you need to load the Object's |
|
646 // class prior to coming here. |
|
647 Node* gen_subtype_check(Node* subklass, Node* superklass); |
|
648 |
|
649 // Static parse-time type checking logic for gen_subtype_check: |
|
650 enum { SSC_always_false, SSC_always_true, SSC_easy_test, SSC_full_test }; |
|
651 int static_subtype_check(ciKlass* superk, ciKlass* subk); |
|
652 |
|
653 // Exact type check used for predicted calls and casts. |
|
654 // Rewrites (*casted_receiver) to be casted to the stronger type. |
|
655 // (Caller is responsible for doing replace_in_map.) |
|
656 Node* type_check_receiver(Node* receiver, ciKlass* klass, float prob, |
|
657 Node* *casted_receiver); |
|
658 |
|
659 // implementation of object creation |
|
660 Node* set_output_for_allocation(AllocateNode* alloc, |
|
661 const TypeOopPtr* oop_type, |
|
662 bool raw_mem_only); |
|
663 Node* get_layout_helper(Node* klass_node, jint& constant_value); |
|
664 Node* new_instance(Node* klass_node, |
|
665 Node* slow_test = NULL, |
|
666 bool raw_mem_only = false, |
|
667 Node* *return_size_val = NULL); |
|
668 Node* new_array(Node* klass_node, Node* count_val, |
|
669 bool raw_mem_only = false, Node* *return_size_val = NULL); |
|
670 |
|
671 // Handy for making control flow |
|
672 IfNode* create_and_map_if(Node* ctrl, Node* tst, float prob, float cnt) { |
|
673 IfNode* iff = new (C, 2) IfNode(ctrl, tst, prob, cnt);// New IfNode's |
|
674 _gvn.set_type(iff, iff->Value(&_gvn)); // Value may be known at parse-time |
|
675 // Place 'if' on worklist if it will be in graph |
|
676 if (!tst->is_Con()) record_for_igvn(iff); // Range-check and Null-check removal is later |
|
677 return iff; |
|
678 } |
|
679 |
|
680 IfNode* create_and_xform_if(Node* ctrl, Node* tst, float prob, float cnt) { |
|
681 IfNode* iff = new (C, 2) IfNode(ctrl, tst, prob, cnt);// New IfNode's |
|
682 _gvn.transform(iff); // Value may be known at parse-time |
|
683 // Place 'if' on worklist if it will be in graph |
|
684 if (!tst->is_Con()) record_for_igvn(iff); // Range-check and Null-check removal is later |
|
685 return iff; |
|
686 } |
|
687 }; |
|
688 |
|
689 // Helper class to support building of control flow branches. Upon |
|
690 // creation the map and sp at bci are cloned and restored upon de- |
|
691 // struction. Typical use: |
|
692 // |
|
693 // { PreserveJVMState pjvms(this); |
|
694 // // code of new branch |
|
695 // } |
|
696 // // here the JVM state at bci is established |
|
697 |
|
698 class PreserveJVMState: public StackObj { |
|
699 protected: |
|
700 GraphKit* _kit; |
|
701 #ifdef ASSERT |
|
702 int _block; // PO of current block, if a Parse |
|
703 int _bci; |
|
704 #endif |
|
705 SafePointNode* _map; |
|
706 uint _sp; |
|
707 |
|
708 public: |
|
709 PreserveJVMState(GraphKit* kit, bool clone_map = true); |
|
710 ~PreserveJVMState(); |
|
711 }; |
|
712 |
|
713 // Helper class to build cutouts of the form if (p) ; else {x...}. |
|
714 // The code {x...} must not fall through. |
|
715 // The kit's main flow of control is set to the "then" continuation of if(p). |
|
716 class BuildCutout: public PreserveJVMState { |
|
717 public: |
|
718 BuildCutout(GraphKit* kit, Node* p, float prob, float cnt = COUNT_UNKNOWN); |
|
719 ~BuildCutout(); |
|
720 }; |