Mercurial > hg > truffle
annotate src/share/vm/opto/callnode.hpp @ 63:eac007780a58
6671807: (Escape Analysis) Add new ideal node to represent the state of a scalarized object at a safepoint
Summary: Values of non-static fields of a scalarized object should be saved in debug info to reallocate the object during deoptimization.
Reviewed-by: never
author | kvn |
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date | Thu, 13 Mar 2008 16:06:34 -0700 |
parents | 76256d272075 |
children | 99269dbf4ba8 |
rev | line source |
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0 | 1 /* |
2 * Copyright 1997-2006 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 // Portions of code courtesy of Clifford Click | |
26 | |
27 // Optimization - Graph Style | |
28 | |
29 class Chaitin; | |
30 class NamedCounter; | |
31 class MultiNode; | |
32 class SafePointNode; | |
33 class CallNode; | |
34 class CallJavaNode; | |
35 class CallStaticJavaNode; | |
36 class CallDynamicJavaNode; | |
37 class CallRuntimeNode; | |
38 class CallLeafNode; | |
39 class CallLeafNoFPNode; | |
40 class AllocateNode; | |
33 | 41 class AllocateArrayNode; |
0 | 42 class LockNode; |
43 class UnlockNode; | |
44 class JVMState; | |
45 class OopMap; | |
46 class State; | |
47 class StartNode; | |
48 class MachCallNode; | |
49 class FastLockNode; | |
50 | |
51 //------------------------------StartNode-------------------------------------- | |
52 // The method start node | |
53 class StartNode : public MultiNode { | |
54 virtual uint cmp( const Node &n ) const; | |
55 virtual uint size_of() const; // Size is bigger | |
56 public: | |
57 const TypeTuple *_domain; | |
58 StartNode( Node *root, const TypeTuple *domain ) : MultiNode(2), _domain(domain) { | |
59 init_class_id(Class_Start); | |
60 init_flags(Flag_is_block_start); | |
61 init_req(0,this); | |
62 init_req(1,root); | |
63 } | |
64 virtual int Opcode() const; | |
65 virtual bool pinned() const { return true; }; | |
66 virtual const Type *bottom_type() const; | |
67 virtual const TypePtr *adr_type() const { return TypePtr::BOTTOM; } | |
68 virtual const Type *Value( PhaseTransform *phase ) const; | |
69 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); | |
70 virtual void calling_convention( BasicType* sig_bt, VMRegPair *parm_reg, uint length ) const; | |
71 virtual const RegMask &in_RegMask(uint) const; | |
72 virtual Node *match( const ProjNode *proj, const Matcher *m ); | |
73 virtual uint ideal_reg() const { return 0; } | |
74 #ifndef PRODUCT | |
75 virtual void dump_spec(outputStream *st) const; | |
76 #endif | |
77 }; | |
78 | |
79 //------------------------------StartOSRNode----------------------------------- | |
80 // The method start node for on stack replacement code | |
81 class StartOSRNode : public StartNode { | |
82 public: | |
83 StartOSRNode( Node *root, const TypeTuple *domain ) : StartNode(root, domain) {} | |
84 virtual int Opcode() const; | |
85 static const TypeTuple *osr_domain(); | |
86 }; | |
87 | |
88 | |
89 //------------------------------ParmNode--------------------------------------- | |
90 // Incoming parameters | |
91 class ParmNode : public ProjNode { | |
92 static const char * const names[TypeFunc::Parms+1]; | |
93 public: | |
33 | 94 ParmNode( StartNode *src, uint con ) : ProjNode(src,con) { |
95 init_class_id(Class_Parm); | |
96 } | |
0 | 97 virtual int Opcode() const; |
98 virtual bool is_CFG() const { return (_con == TypeFunc::Control); } | |
99 virtual uint ideal_reg() const; | |
100 #ifndef PRODUCT | |
101 virtual void dump_spec(outputStream *st) const; | |
102 #endif | |
103 }; | |
104 | |
105 | |
106 //------------------------------ReturnNode------------------------------------- | |
107 // Return from subroutine node | |
108 class ReturnNode : public Node { | |
109 public: | |
110 ReturnNode( uint edges, Node *cntrl, Node *i_o, Node *memory, Node *retadr, Node *frameptr ); | |
111 virtual int Opcode() const; | |
112 virtual bool is_CFG() const { return true; } | |
113 virtual uint hash() const { return NO_HASH; } // CFG nodes do not hash | |
114 virtual bool depends_only_on_test() const { return false; } | |
115 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); | |
116 virtual const Type *Value( PhaseTransform *phase ) const; | |
117 virtual uint ideal_reg() const { return NotAMachineReg; } | |
118 virtual uint match_edge(uint idx) const; | |
119 #ifndef PRODUCT | |
120 virtual void dump_req() const; | |
121 #endif | |
122 }; | |
123 | |
124 | |
125 //------------------------------RethrowNode------------------------------------ | |
126 // Rethrow of exception at call site. Ends a procedure before rethrowing; | |
127 // ends the current basic block like a ReturnNode. Restores registers and | |
128 // unwinds stack. Rethrow happens in the caller's method. | |
129 class RethrowNode : public Node { | |
130 public: | |
131 RethrowNode( Node *cntrl, Node *i_o, Node *memory, Node *frameptr, Node *ret_adr, Node *exception ); | |
132 virtual int Opcode() const; | |
133 virtual bool is_CFG() const { return true; } | |
134 virtual uint hash() const { return NO_HASH; } // CFG nodes do not hash | |
135 virtual bool depends_only_on_test() const { return false; } | |
136 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); | |
137 virtual const Type *Value( PhaseTransform *phase ) const; | |
138 virtual uint match_edge(uint idx) const; | |
139 virtual uint ideal_reg() const { return NotAMachineReg; } | |
140 #ifndef PRODUCT | |
141 virtual void dump_req() const; | |
142 #endif | |
143 }; | |
144 | |
145 | |
146 //------------------------------TailCallNode----------------------------------- | |
147 // Pop stack frame and jump indirect | |
148 class TailCallNode : public ReturnNode { | |
149 public: | |
150 TailCallNode( Node *cntrl, Node *i_o, Node *memory, Node *frameptr, Node *retadr, Node *target, Node *moop ) | |
151 : ReturnNode( TypeFunc::Parms+2, cntrl, i_o, memory, frameptr, retadr ) { | |
152 init_req(TypeFunc::Parms, target); | |
153 init_req(TypeFunc::Parms+1, moop); | |
154 } | |
155 | |
156 virtual int Opcode() const; | |
157 virtual uint match_edge(uint idx) const; | |
158 }; | |
159 | |
160 //------------------------------TailJumpNode----------------------------------- | |
161 // Pop stack frame and jump indirect | |
162 class TailJumpNode : public ReturnNode { | |
163 public: | |
164 TailJumpNode( Node *cntrl, Node *i_o, Node *memory, Node *frameptr, Node *target, Node *ex_oop) | |
165 : ReturnNode(TypeFunc::Parms+2, cntrl, i_o, memory, frameptr, Compile::current()->top()) { | |
166 init_req(TypeFunc::Parms, target); | |
167 init_req(TypeFunc::Parms+1, ex_oop); | |
168 } | |
169 | |
170 virtual int Opcode() const; | |
171 virtual uint match_edge(uint idx) const; | |
172 }; | |
173 | |
174 //-------------------------------JVMState------------------------------------- | |
175 // A linked list of JVMState nodes captures the whole interpreter state, | |
176 // plus GC roots, for all active calls at some call site in this compilation | |
177 // unit. (If there is no inlining, then the list has exactly one link.) | |
178 // This provides a way to map the optimized program back into the interpreter, | |
179 // or to let the GC mark the stack. | |
180 class JVMState : public ResourceObj { | |
181 private: | |
182 JVMState* _caller; // List pointer for forming scope chains | |
183 uint _depth; // One mroe than caller depth, or one. | |
184 uint _locoff; // Offset to locals in input edge mapping | |
185 uint _stkoff; // Offset to stack in input edge mapping | |
186 uint _monoff; // Offset to monitors in input edge mapping | |
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187 uint _scloff; // Offset to fields of scalar objs in input edge mapping |
0 | 188 uint _endoff; // Offset to end of input edge mapping |
189 uint _sp; // Jave Expression Stack Pointer for this state | |
190 int _bci; // Byte Code Index of this JVM point | |
191 ciMethod* _method; // Method Pointer | |
192 SafePointNode* _map; // Map node associated with this scope | |
193 public: | |
194 friend class Compile; | |
195 | |
196 // Because JVMState objects live over the entire lifetime of the | |
197 // Compile object, they are allocated into the comp_arena, which | |
198 // does not get resource marked or reset during the compile process | |
199 void *operator new( size_t x, Compile* C ) { return C->comp_arena()->Amalloc(x); } | |
200 void operator delete( void * ) { } // fast deallocation | |
201 | |
202 // Create a new JVMState, ready for abstract interpretation. | |
203 JVMState(ciMethod* method, JVMState* caller); | |
204 JVMState(int stack_size); // root state; has a null method | |
205 | |
206 // Access functions for the JVM | |
207 uint locoff() const { return _locoff; } | |
208 uint stkoff() const { return _stkoff; } | |
209 uint argoff() const { return _stkoff + _sp; } | |
210 uint monoff() const { return _monoff; } | |
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211 uint scloff() const { return _scloff; } |
0 | 212 uint endoff() const { return _endoff; } |
213 uint oopoff() const { return debug_end(); } | |
214 | |
215 int loc_size() const { return _stkoff - _locoff; } | |
216 int stk_size() const { return _monoff - _stkoff; } | |
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217 int mon_size() const { return _scloff - _monoff; } |
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218 int scl_size() const { return _endoff - _scloff; } |
0 | 219 |
220 bool is_loc(uint i) const { return i >= _locoff && i < _stkoff; } | |
221 bool is_stk(uint i) const { return i >= _stkoff && i < _monoff; } | |
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222 bool is_mon(uint i) const { return i >= _monoff && i < _scloff; } |
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223 bool is_scl(uint i) const { return i >= _scloff && i < _endoff; } |
0 | 224 |
225 uint sp() const { return _sp; } | |
226 int bci() const { return _bci; } | |
227 bool has_method() const { return _method != NULL; } | |
228 ciMethod* method() const { assert(has_method(), ""); return _method; } | |
229 JVMState* caller() const { return _caller; } | |
230 SafePointNode* map() const { return _map; } | |
231 uint depth() const { return _depth; } | |
232 uint debug_start() const; // returns locoff of root caller | |
233 uint debug_end() const; // returns endoff of self | |
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234 uint debug_size() const { |
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235 return loc_size() + sp() + mon_size() + scl_size(); |
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236 } |
0 | 237 uint debug_depth() const; // returns sum of debug_size values at all depths |
238 | |
239 // Returns the JVM state at the desired depth (1 == root). | |
240 JVMState* of_depth(int d) const; | |
241 | |
242 // Tells if two JVM states have the same call chain (depth, methods, & bcis). | |
243 bool same_calls_as(const JVMState* that) const; | |
244 | |
245 // Monitors (monitors are stored as (boxNode, objNode) pairs | |
246 enum { logMonitorEdges = 1 }; | |
247 int nof_monitors() const { return mon_size() >> logMonitorEdges; } | |
248 int monitor_depth() const { return nof_monitors() + (caller() ? caller()->monitor_depth() : 0); } | |
249 int monitor_box_offset(int idx) const { return monoff() + (idx << logMonitorEdges) + 0; } | |
250 int monitor_obj_offset(int idx) const { return monoff() + (idx << logMonitorEdges) + 1; } | |
251 bool is_monitor_box(uint off) const { | |
252 assert(is_mon(off), "should be called only for monitor edge"); | |
253 return (0 == bitfield(off - monoff(), 0, logMonitorEdges)); | |
254 } | |
255 bool is_monitor_use(uint off) const { return (is_mon(off) | |
256 && is_monitor_box(off)) | |
257 || (caller() && caller()->is_monitor_use(off)); } | |
258 | |
259 // Initialization functions for the JVM | |
260 void set_locoff(uint off) { _locoff = off; } | |
261 void set_stkoff(uint off) { _stkoff = off; } | |
262 void set_monoff(uint off) { _monoff = off; } | |
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263 void set_scloff(uint off) { _scloff = off; } |
0 | 264 void set_endoff(uint off) { _endoff = off; } |
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265 void set_offsets(uint off) { |
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266 _locoff = _stkoff = _monoff = _scloff = _endoff = off; |
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267 } |
0 | 268 void set_map(SafePointNode *map) { _map = map; } |
269 void set_sp(uint sp) { _sp = sp; } | |
270 void set_bci(int bci) { _bci = bci; } | |
271 | |
272 // Miscellaneous utility functions | |
273 JVMState* clone_deep(Compile* C) const; // recursively clones caller chain | |
274 JVMState* clone_shallow(Compile* C) const; // retains uncloned caller | |
275 | |
276 #ifndef PRODUCT | |
277 void format(PhaseRegAlloc *regalloc, const Node *n, outputStream* st) const; | |
278 void dump_spec(outputStream *st) const; | |
279 void dump_on(outputStream* st) const; | |
280 void dump() const { | |
281 dump_on(tty); | |
282 } | |
283 #endif | |
284 }; | |
285 | |
286 //------------------------------SafePointNode---------------------------------- | |
287 // A SafePointNode is a subclass of a MultiNode for convenience (and | |
288 // potential code sharing) only - conceptually it is independent of | |
289 // the Node semantics. | |
290 class SafePointNode : public MultiNode { | |
291 virtual uint cmp( const Node &n ) const; | |
292 virtual uint size_of() const; // Size is bigger | |
293 | |
294 public: | |
295 SafePointNode(uint edges, JVMState* jvms, | |
296 // A plain safepoint advertises no memory effects (NULL): | |
297 const TypePtr* adr_type = NULL) | |
298 : MultiNode( edges ), | |
299 _jvms(jvms), | |
300 _oop_map(NULL), | |
301 _adr_type(adr_type) | |
302 { | |
303 init_class_id(Class_SafePoint); | |
304 } | |
305 | |
306 OopMap* _oop_map; // Array of OopMap info (8-bit char) for GC | |
307 JVMState* const _jvms; // Pointer to list of JVM State objects | |
308 const TypePtr* _adr_type; // What type of memory does this node produce? | |
309 | |
310 // Many calls take *all* of memory as input, | |
311 // but some produce a limited subset of that memory as output. | |
312 // The adr_type reports the call's behavior as a store, not a load. | |
313 | |
314 virtual JVMState* jvms() const { return _jvms; } | |
315 void set_jvms(JVMState* s) { | |
316 *(JVMState**)&_jvms = s; // override const attribute in the accessor | |
317 } | |
318 OopMap *oop_map() const { return _oop_map; } | |
319 void set_oop_map(OopMap *om) { _oop_map = om; } | |
320 | |
321 // Functionality from old debug nodes which has changed | |
322 Node *local(JVMState* jvms, uint idx) const { | |
323 assert(verify_jvms(jvms), "jvms must match"); | |
324 return in(jvms->locoff() + idx); | |
325 } | |
326 Node *stack(JVMState* jvms, uint idx) const { | |
327 assert(verify_jvms(jvms), "jvms must match"); | |
328 return in(jvms->stkoff() + idx); | |
329 } | |
330 Node *argument(JVMState* jvms, uint idx) const { | |
331 assert(verify_jvms(jvms), "jvms must match"); | |
332 return in(jvms->argoff() + idx); | |
333 } | |
334 Node *monitor_box(JVMState* jvms, uint idx) const { | |
335 assert(verify_jvms(jvms), "jvms must match"); | |
336 return in(jvms->monitor_box_offset(idx)); | |
337 } | |
338 Node *monitor_obj(JVMState* jvms, uint idx) const { | |
339 assert(verify_jvms(jvms), "jvms must match"); | |
340 return in(jvms->monitor_obj_offset(idx)); | |
341 } | |
342 | |
343 void set_local(JVMState* jvms, uint idx, Node *c); | |
344 | |
345 void set_stack(JVMState* jvms, uint idx, Node *c) { | |
346 assert(verify_jvms(jvms), "jvms must match"); | |
347 set_req(jvms->stkoff() + idx, c); | |
348 } | |
349 void set_argument(JVMState* jvms, uint idx, Node *c) { | |
350 assert(verify_jvms(jvms), "jvms must match"); | |
351 set_req(jvms->argoff() + idx, c); | |
352 } | |
353 void ensure_stack(JVMState* jvms, uint stk_size) { | |
354 assert(verify_jvms(jvms), "jvms must match"); | |
355 int grow_by = (int)stk_size - (int)jvms->stk_size(); | |
356 if (grow_by > 0) grow_stack(jvms, grow_by); | |
357 } | |
358 void grow_stack(JVMState* jvms, uint grow_by); | |
359 // Handle monitor stack | |
360 void push_monitor( const FastLockNode *lock ); | |
361 void pop_monitor (); | |
362 Node *peek_monitor_box() const; | |
363 Node *peek_monitor_obj() const; | |
364 | |
365 // Access functions for the JVM | |
366 Node *control () const { return in(TypeFunc::Control ); } | |
367 Node *i_o () const { return in(TypeFunc::I_O ); } | |
368 Node *memory () const { return in(TypeFunc::Memory ); } | |
369 Node *returnadr() const { return in(TypeFunc::ReturnAdr); } | |
370 Node *frameptr () const { return in(TypeFunc::FramePtr ); } | |
371 | |
372 void set_control ( Node *c ) { set_req(TypeFunc::Control,c); } | |
373 void set_i_o ( Node *c ) { set_req(TypeFunc::I_O ,c); } | |
374 void set_memory ( Node *c ) { set_req(TypeFunc::Memory ,c); } | |
375 | |
376 MergeMemNode* merged_memory() const { | |
377 return in(TypeFunc::Memory)->as_MergeMem(); | |
378 } | |
379 | |
380 // The parser marks useless maps as dead when it's done with them: | |
381 bool is_killed() { return in(TypeFunc::Control) == NULL; } | |
382 | |
383 // Exception states bubbling out of subgraphs such as inlined calls | |
384 // are recorded here. (There might be more than one, hence the "next".) | |
385 // This feature is used only for safepoints which serve as "maps" | |
386 // for JVM states during parsing, intrinsic expansion, etc. | |
387 SafePointNode* next_exception() const; | |
388 void set_next_exception(SafePointNode* n); | |
389 bool has_exceptions() const { return next_exception() != NULL; } | |
390 | |
391 // Standard Node stuff | |
392 virtual int Opcode() const; | |
393 virtual bool pinned() const { return true; } | |
394 virtual const Type *Value( PhaseTransform *phase ) const; | |
395 virtual const Type *bottom_type() const { return Type::CONTROL; } | |
396 virtual const TypePtr *adr_type() const { return _adr_type; } | |
397 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); | |
398 virtual Node *Identity( PhaseTransform *phase ); | |
399 virtual uint ideal_reg() const { return 0; } | |
400 virtual const RegMask &in_RegMask(uint) const; | |
401 virtual const RegMask &out_RegMask() const; | |
402 virtual uint match_edge(uint idx) const; | |
403 | |
404 static bool needs_polling_address_input(); | |
405 | |
406 #ifndef PRODUCT | |
407 virtual void dump_spec(outputStream *st) const; | |
408 #endif | |
409 }; | |
410 | |
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411 //------------------------------SafePointScalarObjectNode---------------------- |
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412 // A SafePointScalarObjectNode represents the state of a scalarized object |
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413 // at a safepoint. |
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414 |
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415 class SafePointScalarObjectNode: public TypeNode { |
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416 uint _first_index; // First input edge index of a SafePoint node where |
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417 // states of the scalarized object fields are collected. |
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418 uint _n_fields; // Number of non-static fields of the scalarized object. |
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419 DEBUG_ONLY(AllocateNode* _alloc); |
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420 public: |
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421 SafePointScalarObjectNode(const TypeOopPtr* tp, |
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422 #ifdef ASSERT |
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423 AllocateNode* alloc, |
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424 #endif |
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425 uint first_index, uint n_fields); |
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426 virtual int Opcode() const; |
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427 virtual uint ideal_reg() const; |
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428 virtual const RegMask &in_RegMask(uint) const; |
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429 virtual const RegMask &out_RegMask() const; |
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430 virtual uint match_edge(uint idx) const; |
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431 |
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432 uint first_index() const { return _first_index; } |
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433 uint n_fields() const { return _n_fields; } |
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434 DEBUG_ONLY(AllocateNode* alloc() const { return _alloc; }) |
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435 |
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436 virtual uint size_of() const { return sizeof(*this); } |
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437 |
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438 // Assumes that "this" is an argument to a safepoint node "s", and that |
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439 // "new_call" is being created to correspond to "s". But the difference |
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440 // between the start index of the jvmstates of "new_call" and "s" is |
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441 // "jvms_adj". Produce and return a SafePointScalarObjectNode that |
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442 // corresponds appropriately to "this" in "new_call". Assumes that |
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443 // "sosn_map" is a map, specific to the translation of "s" to "new_call", |
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444 // mapping old SafePointScalarObjectNodes to new, to avoid multiple copies. |
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445 SafePointScalarObjectNode* clone(int jvms_adj, Dict* sosn_map) const; |
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446 |
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447 #ifndef PRODUCT |
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448 virtual void dump_spec(outputStream *st) const; |
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449 #endif |
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450 }; |
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451 |
0 | 452 //------------------------------CallNode--------------------------------------- |
453 // Call nodes now subsume the function of debug nodes at callsites, so they | |
454 // contain the functionality of a full scope chain of debug nodes. | |
455 class CallNode : public SafePointNode { | |
456 public: | |
457 const TypeFunc *_tf; // Function type | |
458 address _entry_point; // Address of method being called | |
459 float _cnt; // Estimate of number of times called | |
460 PointsToNode::EscapeState _escape_state; | |
461 | |
462 CallNode(const TypeFunc* tf, address addr, const TypePtr* adr_type) | |
463 : SafePointNode(tf->domain()->cnt(), NULL, adr_type), | |
464 _tf(tf), | |
465 _entry_point(addr), | |
466 _cnt(COUNT_UNKNOWN) | |
467 { | |
468 init_class_id(Class_Call); | |
469 init_flags(Flag_is_Call); | |
470 _escape_state = PointsToNode::UnknownEscape; | |
471 } | |
472 | |
473 const TypeFunc* tf() const { return _tf; } | |
474 const address entry_point() const { return _entry_point; } | |
475 const float cnt() const { return _cnt; } | |
476 | |
477 void set_tf(const TypeFunc* tf) { _tf = tf; } | |
478 void set_entry_point(address p) { _entry_point = p; } | |
479 void set_cnt(float c) { _cnt = c; } | |
480 | |
481 virtual const Type *bottom_type() const; | |
482 virtual const Type *Value( PhaseTransform *phase ) const; | |
483 virtual Node *Identity( PhaseTransform *phase ) { return this; } | |
484 virtual uint cmp( const Node &n ) const; | |
485 virtual uint size_of() const = 0; | |
486 virtual void calling_convention( BasicType* sig_bt, VMRegPair *parm_regs, uint argcnt ) const; | |
487 virtual Node *match( const ProjNode *proj, const Matcher *m ); | |
488 virtual uint ideal_reg() const { return NotAMachineReg; } | |
489 // Are we guaranteed that this node is a safepoint? Not true for leaf calls and | |
490 // for some macro nodes whose expansion does not have a safepoint on the fast path. | |
491 virtual bool guaranteed_safepoint() { return true; } | |
492 // For macro nodes, the JVMState gets modified during expansion, so when cloning | |
493 // the node the JVMState must be cloned. | |
494 virtual void clone_jvms() { } // default is not to clone | |
495 | |
496 virtual uint match_edge(uint idx) const; | |
497 | |
498 #ifndef PRODUCT | |
499 virtual void dump_req() const; | |
500 virtual void dump_spec(outputStream *st) const; | |
501 #endif | |
502 }; | |
503 | |
504 //------------------------------CallJavaNode----------------------------------- | |
505 // Make a static or dynamic subroutine call node using Java calling | |
506 // convention. (The "Java" calling convention is the compiler's calling | |
507 // convention, as opposed to the interpreter's or that of native C.) | |
508 class CallJavaNode : public CallNode { | |
509 protected: | |
510 virtual uint cmp( const Node &n ) const; | |
511 virtual uint size_of() const; // Size is bigger | |
512 | |
513 bool _optimized_virtual; | |
514 ciMethod* _method; // Method being direct called | |
515 public: | |
516 const int _bci; // Byte Code Index of call byte code | |
517 CallJavaNode(const TypeFunc* tf , address addr, ciMethod* method, int bci) | |
518 : CallNode(tf, addr, TypePtr::BOTTOM), | |
519 _method(method), _bci(bci), _optimized_virtual(false) | |
520 { | |
521 init_class_id(Class_CallJava); | |
522 } | |
523 | |
524 virtual int Opcode() const; | |
525 ciMethod* method() const { return _method; } | |
526 void set_method(ciMethod *m) { _method = m; } | |
527 void set_optimized_virtual(bool f) { _optimized_virtual = f; } | |
528 bool is_optimized_virtual() const { return _optimized_virtual; } | |
529 | |
530 #ifndef PRODUCT | |
531 virtual void dump_spec(outputStream *st) const; | |
532 #endif | |
533 }; | |
534 | |
535 //------------------------------CallStaticJavaNode----------------------------- | |
536 // Make a direct subroutine call using Java calling convention (for static | |
537 // calls and optimized virtual calls, plus calls to wrappers for run-time | |
538 // routines); generates static stub. | |
539 class CallStaticJavaNode : public CallJavaNode { | |
540 virtual uint cmp( const Node &n ) const; | |
541 virtual uint size_of() const; // Size is bigger | |
542 public: | |
543 CallStaticJavaNode(const TypeFunc* tf, address addr, ciMethod* method, int bci) | |
544 : CallJavaNode(tf, addr, method, bci), _name(NULL) { | |
545 init_class_id(Class_CallStaticJava); | |
546 } | |
547 CallStaticJavaNode(const TypeFunc* tf, address addr, const char* name, int bci, | |
548 const TypePtr* adr_type) | |
549 : CallJavaNode(tf, addr, NULL, bci), _name(name) { | |
550 init_class_id(Class_CallStaticJava); | |
551 // This node calls a runtime stub, which often has narrow memory effects. | |
552 _adr_type = adr_type; | |
553 } | |
554 const char *_name; // Runtime wrapper name | |
555 | |
556 // If this is an uncommon trap, return the request code, else zero. | |
557 int uncommon_trap_request() const; | |
558 static int extract_uncommon_trap_request(const Node* call); | |
559 | |
560 virtual int Opcode() const; | |
561 #ifndef PRODUCT | |
562 virtual void dump_spec(outputStream *st) const; | |
563 #endif | |
564 }; | |
565 | |
566 //------------------------------CallDynamicJavaNode---------------------------- | |
567 // Make a dispatched call using Java calling convention. | |
568 class CallDynamicJavaNode : public CallJavaNode { | |
569 virtual uint cmp( const Node &n ) const; | |
570 virtual uint size_of() const; // Size is bigger | |
571 public: | |
572 CallDynamicJavaNode( const TypeFunc *tf , address addr, ciMethod* method, int vtable_index, int bci ) : CallJavaNode(tf,addr,method,bci), _vtable_index(vtable_index) { | |
573 init_class_id(Class_CallDynamicJava); | |
574 } | |
575 | |
576 int _vtable_index; | |
577 virtual int Opcode() const; | |
578 #ifndef PRODUCT | |
579 virtual void dump_spec(outputStream *st) const; | |
580 #endif | |
581 }; | |
582 | |
583 //------------------------------CallRuntimeNode-------------------------------- | |
584 // Make a direct subroutine call node into compiled C++ code. | |
585 class CallRuntimeNode : public CallNode { | |
586 virtual uint cmp( const Node &n ) const; | |
587 virtual uint size_of() const; // Size is bigger | |
588 public: | |
589 CallRuntimeNode(const TypeFunc* tf, address addr, const char* name, | |
590 const TypePtr* adr_type) | |
591 : CallNode(tf, addr, adr_type), | |
592 _name(name) | |
593 { | |
594 init_class_id(Class_CallRuntime); | |
595 } | |
596 | |
597 const char *_name; // Printable name, if _method is NULL | |
598 virtual int Opcode() const; | |
599 virtual void calling_convention( BasicType* sig_bt, VMRegPair *parm_regs, uint argcnt ) const; | |
600 | |
601 #ifndef PRODUCT | |
602 virtual void dump_spec(outputStream *st) const; | |
603 #endif | |
604 }; | |
605 | |
606 //------------------------------CallLeafNode----------------------------------- | |
607 // Make a direct subroutine call node into compiled C++ code, without | |
608 // safepoints | |
609 class CallLeafNode : public CallRuntimeNode { | |
610 public: | |
611 CallLeafNode(const TypeFunc* tf, address addr, const char* name, | |
612 const TypePtr* adr_type) | |
613 : CallRuntimeNode(tf, addr, name, adr_type) | |
614 { | |
615 init_class_id(Class_CallLeaf); | |
616 } | |
617 virtual int Opcode() const; | |
618 virtual bool guaranteed_safepoint() { return false; } | |
619 #ifndef PRODUCT | |
620 virtual void dump_spec(outputStream *st) const; | |
621 #endif | |
622 }; | |
623 | |
624 //------------------------------CallLeafNoFPNode------------------------------- | |
625 // CallLeafNode, not using floating point or using it in the same manner as | |
626 // the generated code | |
627 class CallLeafNoFPNode : public CallLeafNode { | |
628 public: | |
629 CallLeafNoFPNode(const TypeFunc* tf, address addr, const char* name, | |
630 const TypePtr* adr_type) | |
631 : CallLeafNode(tf, addr, name, adr_type) | |
632 { | |
633 } | |
634 virtual int Opcode() const; | |
635 }; | |
636 | |
637 | |
638 //------------------------------Allocate--------------------------------------- | |
639 // High-level memory allocation | |
640 // | |
641 // AllocateNode and AllocateArrayNode are subclasses of CallNode because they will | |
642 // get expanded into a code sequence containing a call. Unlike other CallNodes, | |
643 // they have 2 memory projections and 2 i_o projections (which are distinguished by | |
644 // the _is_io_use flag in the projection.) This is needed when expanding the node in | |
645 // order to differentiate the uses of the projection on the normal control path from | |
646 // those on the exception return path. | |
647 // | |
648 class AllocateNode : public CallNode { | |
649 public: | |
650 enum { | |
651 // Output: | |
652 RawAddress = TypeFunc::Parms, // the newly-allocated raw address | |
653 // Inputs: | |
654 AllocSize = TypeFunc::Parms, // size (in bytes) of the new object | |
655 KlassNode, // type (maybe dynamic) of the obj. | |
656 InitialTest, // slow-path test (may be constant) | |
657 ALength, // array length (or TOP if none) | |
658 ParmLimit | |
659 }; | |
660 | |
661 static const TypeFunc* alloc_type() { | |
662 const Type** fields = TypeTuple::fields(ParmLimit - TypeFunc::Parms); | |
663 fields[AllocSize] = TypeInt::POS; | |
664 fields[KlassNode] = TypeInstPtr::NOTNULL; | |
665 fields[InitialTest] = TypeInt::BOOL; | |
666 fields[ALength] = TypeInt::INT; // length (can be a bad length) | |
667 | |
668 const TypeTuple *domain = TypeTuple::make(ParmLimit, fields); | |
669 | |
670 // create result type (range) | |
671 fields = TypeTuple::fields(1); | |
672 fields[TypeFunc::Parms+0] = TypeRawPtr::NOTNULL; // Returned oop | |
673 | |
674 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+1, fields); | |
675 | |
676 return TypeFunc::make(domain, range); | |
677 } | |
678 | |
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679 bool _is_scalar_replaceable; // Result of Escape Analysis |
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680 |
0 | 681 virtual uint size_of() const; // Size is bigger |
682 AllocateNode(Compile* C, const TypeFunc *atype, Node *ctrl, Node *mem, Node *abio, | |
683 Node *size, Node *klass_node, Node *initial_test); | |
684 // Expansion modifies the JVMState, so we need to clone it | |
685 virtual void clone_jvms() { | |
686 set_jvms(jvms()->clone_deep(Compile::current())); | |
687 } | |
688 virtual int Opcode() const; | |
689 virtual uint ideal_reg() const { return Op_RegP; } | |
690 virtual bool guaranteed_safepoint() { return false; } | |
691 | |
692 // Pattern-match a possible usage of AllocateNode. | |
693 // Return null if no allocation is recognized. | |
694 // The operand is the pointer produced by the (possible) allocation. | |
695 // It must be a projection of the Allocate or its subsequent CastPP. | |
696 // (Note: This function is defined in file graphKit.cpp, near | |
697 // GraphKit::new_instance/new_array, whose output it recognizes.) | |
698 // The 'ptr' may not have an offset unless the 'offset' argument is given. | |
699 static AllocateNode* Ideal_allocation(Node* ptr, PhaseTransform* phase); | |
700 | |
701 // Fancy version which uses AddPNode::Ideal_base_and_offset to strip | |
702 // an offset, which is reported back to the caller. | |
703 // (Note: AllocateNode::Ideal_allocation is defined in graphKit.cpp.) | |
704 static AllocateNode* Ideal_allocation(Node* ptr, PhaseTransform* phase, | |
705 intptr_t& offset); | |
706 | |
707 // Dig the klass operand out of a (possible) allocation site. | |
708 static Node* Ideal_klass(Node* ptr, PhaseTransform* phase) { | |
709 AllocateNode* allo = Ideal_allocation(ptr, phase); | |
710 return (allo == NULL) ? NULL : allo->in(KlassNode); | |
711 } | |
712 | |
713 // Conservatively small estimate of offset of first non-header byte. | |
714 int minimum_header_size() { | |
715 return is_AllocateArray() ? sizeof(arrayOopDesc) : sizeof(oopDesc); | |
716 } | |
717 | |
718 // Return the corresponding initialization barrier (or null if none). | |
719 // Walks out edges to find it... | |
720 // (Note: Both InitializeNode::allocation and AllocateNode::initialization | |
721 // are defined in graphKit.cpp, which sets up the bidirectional relation.) | |
722 InitializeNode* initialization(); | |
723 | |
724 // Convenience for initialization->maybe_set_complete(phase) | |
725 bool maybe_set_complete(PhaseGVN* phase); | |
726 }; | |
727 | |
728 //------------------------------AllocateArray--------------------------------- | |
729 // | |
730 // High-level array allocation | |
731 // | |
732 class AllocateArrayNode : public AllocateNode { | |
733 public: | |
734 AllocateArrayNode(Compile* C, const TypeFunc *atype, Node *ctrl, Node *mem, Node *abio, | |
735 Node* size, Node* klass_node, Node* initial_test, | |
736 Node* count_val | |
737 ) | |
738 : AllocateNode(C, atype, ctrl, mem, abio, size, klass_node, | |
739 initial_test) | |
740 { | |
741 init_class_id(Class_AllocateArray); | |
742 set_req(AllocateNode::ALength, count_val); | |
743 } | |
744 virtual int Opcode() const; | |
745 virtual uint size_of() const; // Size is bigger | |
746 | |
747 // Pattern-match a possible usage of AllocateArrayNode. | |
748 // Return null if no allocation is recognized. | |
749 static AllocateArrayNode* Ideal_array_allocation(Node* ptr, PhaseTransform* phase) { | |
750 AllocateNode* allo = Ideal_allocation(ptr, phase); | |
751 return (allo == NULL || !allo->is_AllocateArray()) | |
752 ? NULL : allo->as_AllocateArray(); | |
753 } | |
754 | |
755 // Dig the length operand out of a (possible) array allocation site. | |
756 static Node* Ideal_length(Node* ptr, PhaseTransform* phase) { | |
757 AllocateArrayNode* allo = Ideal_array_allocation(ptr, phase); | |
758 return (allo == NULL) ? NULL : allo->in(AllocateNode::ALength); | |
759 } | |
760 }; | |
761 | |
762 //------------------------------AbstractLockNode----------------------------------- | |
763 class AbstractLockNode: public CallNode { | |
764 private: | |
765 bool _eliminate; // indicates this lock can be safely eliminated | |
766 #ifndef PRODUCT | |
767 NamedCounter* _counter; | |
768 #endif | |
769 | |
770 protected: | |
771 // helper functions for lock elimination | |
772 // | |
773 | |
774 bool find_matching_unlock(const Node* ctrl, LockNode* lock, | |
775 GrowableArray<AbstractLockNode*> &lock_ops); | |
776 bool find_lock_and_unlock_through_if(Node* node, LockNode* lock, | |
777 GrowableArray<AbstractLockNode*> &lock_ops); | |
778 bool find_unlocks_for_region(const RegionNode* region, LockNode* lock, | |
779 GrowableArray<AbstractLockNode*> &lock_ops); | |
780 LockNode *find_matching_lock(UnlockNode* unlock); | |
781 | |
782 | |
783 public: | |
784 AbstractLockNode(const TypeFunc *tf) | |
785 : CallNode(tf, NULL, TypeRawPtr::BOTTOM), | |
786 _eliminate(false) | |
787 { | |
788 #ifndef PRODUCT | |
789 _counter = NULL; | |
790 #endif | |
791 } | |
792 virtual int Opcode() const = 0; | |
793 Node * obj_node() const {return in(TypeFunc::Parms + 0); } | |
794 Node * box_node() const {return in(TypeFunc::Parms + 1); } | |
795 Node * fastlock_node() const {return in(TypeFunc::Parms + 2); } | |
796 const Type *sub(const Type *t1, const Type *t2) const { return TypeInt::CC;} | |
797 | |
798 virtual uint size_of() const { return sizeof(*this); } | |
799 | |
800 bool is_eliminated() {return _eliminate; } | |
801 // mark node as eliminated and update the counter if there is one | |
802 void set_eliminated(); | |
803 | |
804 #ifndef PRODUCT | |
805 void create_lock_counter(JVMState* s); | |
806 NamedCounter* counter() const { return _counter; } | |
807 #endif | |
808 }; | |
809 | |
810 //------------------------------Lock--------------------------------------- | |
811 // High-level lock operation | |
812 // | |
813 // This is a subclass of CallNode because it is a macro node which gets expanded | |
814 // into a code sequence containing a call. This node takes 3 "parameters": | |
815 // 0 - object to lock | |
816 // 1 - a BoxLockNode | |
817 // 2 - a FastLockNode | |
818 // | |
819 class LockNode : public AbstractLockNode { | |
820 public: | |
821 | |
822 static const TypeFunc *lock_type() { | |
823 // create input type (domain) | |
824 const Type **fields = TypeTuple::fields(3); | |
825 fields[TypeFunc::Parms+0] = TypeInstPtr::NOTNULL; // Object to be Locked | |
826 fields[TypeFunc::Parms+1] = TypeRawPtr::BOTTOM; // Address of stack location for lock | |
827 fields[TypeFunc::Parms+2] = TypeInt::BOOL; // FastLock | |
828 const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+3,fields); | |
829 | |
830 // create result type (range) | |
831 fields = TypeTuple::fields(0); | |
832 | |
833 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+0,fields); | |
834 | |
835 return TypeFunc::make(domain,range); | |
836 } | |
837 | |
838 virtual int Opcode() const; | |
839 virtual uint size_of() const; // Size is bigger | |
840 LockNode(Compile* C, const TypeFunc *tf) : AbstractLockNode( tf ) { | |
841 init_class_id(Class_Lock); | |
842 init_flags(Flag_is_macro); | |
843 C->add_macro_node(this); | |
844 } | |
845 virtual bool guaranteed_safepoint() { return false; } | |
846 | |
847 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); | |
848 // Expansion modifies the JVMState, so we need to clone it | |
849 virtual void clone_jvms() { | |
850 set_jvms(jvms()->clone_deep(Compile::current())); | |
851 } | |
852 }; | |
853 | |
854 //------------------------------Unlock--------------------------------------- | |
855 // High-level unlock operation | |
856 class UnlockNode : public AbstractLockNode { | |
857 public: | |
858 virtual int Opcode() const; | |
859 virtual uint size_of() const; // Size is bigger | |
860 UnlockNode(Compile* C, const TypeFunc *tf) : AbstractLockNode( tf ) { | |
861 init_class_id(Class_Unlock); | |
862 init_flags(Flag_is_macro); | |
863 C->add_macro_node(this); | |
864 } | |
865 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); | |
866 // unlock is never a safepoint | |
867 virtual bool guaranteed_safepoint() { return false; } | |
868 }; |