Mercurial > hg > truffle
annotate src/share/vm/opto/callnode.hpp @ 1080:7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
Reviewed-by: kvn, twisti
author | never |
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date | Thu, 12 Nov 2009 09:24:21 -0800 |
parents | 15bbd3f505c0 |
children | 97125851f396 |
rev | line source |
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0 | 1 /* |
844 | 2 * Copyright 1997-2009 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 // 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 { | |
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181 public: |
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182 typedef enum { |
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183 Reexecute_Undefined = -1, // not defined -- will be translated into false later |
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184 Reexecute_False = 0, // false -- do not reexecute |
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185 Reexecute_True = 1 // true -- reexecute the bytecode |
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186 } ReexecuteState; //Reexecute State |
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187 |
0 | 188 private: |
189 JVMState* _caller; // List pointer for forming scope chains | |
190 uint _depth; // One mroe than caller depth, or one. | |
191 uint _locoff; // Offset to locals in input edge mapping | |
192 uint _stkoff; // Offset to stack in input edge mapping | |
193 uint _monoff; // Offset to monitors in input edge mapping | |
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194 uint _scloff; // Offset to fields of scalar objs in input edge mapping |
0 | 195 uint _endoff; // Offset to end of input edge mapping |
196 uint _sp; // Jave Expression Stack Pointer for this state | |
197 int _bci; // Byte Code Index of this JVM point | |
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198 ReexecuteState _reexecute; // Whether this bytecode need to be re-executed |
0 | 199 ciMethod* _method; // Method Pointer |
200 SafePointNode* _map; // Map node associated with this scope | |
201 public: | |
202 friend class Compile; | |
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203 friend class PreserveReexecuteState; |
0 | 204 |
205 // Because JVMState objects live over the entire lifetime of the | |
206 // Compile object, they are allocated into the comp_arena, which | |
207 // does not get resource marked or reset during the compile process | |
208 void *operator new( size_t x, Compile* C ) { return C->comp_arena()->Amalloc(x); } | |
209 void operator delete( void * ) { } // fast deallocation | |
210 | |
211 // Create a new JVMState, ready for abstract interpretation. | |
212 JVMState(ciMethod* method, JVMState* caller); | |
213 JVMState(int stack_size); // root state; has a null method | |
214 | |
215 // Access functions for the JVM | |
216 uint locoff() const { return _locoff; } | |
217 uint stkoff() const { return _stkoff; } | |
218 uint argoff() const { return _stkoff + _sp; } | |
219 uint monoff() const { return _monoff; } | |
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220 uint scloff() const { return _scloff; } |
0 | 221 uint endoff() const { return _endoff; } |
222 uint oopoff() const { return debug_end(); } | |
223 | |
224 int loc_size() const { return _stkoff - _locoff; } | |
225 int stk_size() const { return _monoff - _stkoff; } | |
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226 int mon_size() const { return _scloff - _monoff; } |
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227 int scl_size() const { return _endoff - _scloff; } |
0 | 228 |
229 bool is_loc(uint i) const { return i >= _locoff && i < _stkoff; } | |
230 bool is_stk(uint i) const { return i >= _stkoff && i < _monoff; } | |
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231 bool is_mon(uint i) const { return i >= _monoff && i < _scloff; } |
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232 bool is_scl(uint i) const { return i >= _scloff && i < _endoff; } |
0 | 233 |
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234 uint sp() const { return _sp; } |
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235 int bci() const { return _bci; } |
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236 bool should_reexecute() const { return _reexecute==Reexecute_True; } |
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237 bool is_reexecute_undefined() const { return _reexecute==Reexecute_Undefined; } |
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238 bool has_method() const { return _method != NULL; } |
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239 ciMethod* method() const { assert(has_method(), ""); return _method; } |
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240 JVMState* caller() const { return _caller; } |
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241 SafePointNode* map() const { return _map; } |
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242 uint depth() const { return _depth; } |
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243 uint debug_start() const; // returns locoff of root caller |
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244 uint debug_end() const; // returns endoff of self |
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245 uint debug_size() const { |
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246 return loc_size() + sp() + mon_size() + scl_size(); |
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247 } |
0 | 248 uint debug_depth() const; // returns sum of debug_size values at all depths |
249 | |
250 // Returns the JVM state at the desired depth (1 == root). | |
251 JVMState* of_depth(int d) const; | |
252 | |
253 // Tells if two JVM states have the same call chain (depth, methods, & bcis). | |
254 bool same_calls_as(const JVMState* that) const; | |
255 | |
256 // Monitors (monitors are stored as (boxNode, objNode) pairs | |
257 enum { logMonitorEdges = 1 }; | |
258 int nof_monitors() const { return mon_size() >> logMonitorEdges; } | |
259 int monitor_depth() const { return nof_monitors() + (caller() ? caller()->monitor_depth() : 0); } | |
260 int monitor_box_offset(int idx) const { return monoff() + (idx << logMonitorEdges) + 0; } | |
261 int monitor_obj_offset(int idx) const { return monoff() + (idx << logMonitorEdges) + 1; } | |
262 bool is_monitor_box(uint off) const { | |
263 assert(is_mon(off), "should be called only for monitor edge"); | |
264 return (0 == bitfield(off - monoff(), 0, logMonitorEdges)); | |
265 } | |
266 bool is_monitor_use(uint off) const { return (is_mon(off) | |
267 && is_monitor_box(off)) | |
268 || (caller() && caller()->is_monitor_use(off)); } | |
269 | |
270 // Initialization functions for the JVM | |
271 void set_locoff(uint off) { _locoff = off; } | |
272 void set_stkoff(uint off) { _stkoff = off; } | |
273 void set_monoff(uint off) { _monoff = off; } | |
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274 void set_scloff(uint off) { _scloff = off; } |
0 | 275 void set_endoff(uint off) { _endoff = off; } |
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276 void set_offsets(uint off) { |
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277 _locoff = _stkoff = _monoff = _scloff = _endoff = off; |
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278 } |
0 | 279 void set_map(SafePointNode *map) { _map = map; } |
280 void set_sp(uint sp) { _sp = sp; } | |
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281 // _reexecute is initialized to "undefined" for a new bci |
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282 void set_bci(int bci) {if(_bci != bci)_reexecute=Reexecute_Undefined; _bci = bci; } |
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283 void set_should_reexecute(bool reexec) {_reexecute = reexec ? Reexecute_True : Reexecute_False;} |
0 | 284 |
285 // Miscellaneous utility functions | |
286 JVMState* clone_deep(Compile* C) const; // recursively clones caller chain | |
287 JVMState* clone_shallow(Compile* C) const; // retains uncloned caller | |
288 | |
289 #ifndef PRODUCT | |
290 void format(PhaseRegAlloc *regalloc, const Node *n, outputStream* st) const; | |
291 void dump_spec(outputStream *st) const; | |
292 void dump_on(outputStream* st) const; | |
293 void dump() const { | |
294 dump_on(tty); | |
295 } | |
296 #endif | |
297 }; | |
298 | |
299 //------------------------------SafePointNode---------------------------------- | |
300 // A SafePointNode is a subclass of a MultiNode for convenience (and | |
301 // potential code sharing) only - conceptually it is independent of | |
302 // the Node semantics. | |
303 class SafePointNode : public MultiNode { | |
304 virtual uint cmp( const Node &n ) const; | |
305 virtual uint size_of() const; // Size is bigger | |
306 | |
307 public: | |
308 SafePointNode(uint edges, JVMState* jvms, | |
309 // A plain safepoint advertises no memory effects (NULL): | |
310 const TypePtr* adr_type = NULL) | |
311 : MultiNode( edges ), | |
312 _jvms(jvms), | |
313 _oop_map(NULL), | |
314 _adr_type(adr_type) | |
315 { | |
316 init_class_id(Class_SafePoint); | |
317 } | |
318 | |
319 OopMap* _oop_map; // Array of OopMap info (8-bit char) for GC | |
320 JVMState* const _jvms; // Pointer to list of JVM State objects | |
321 const TypePtr* _adr_type; // What type of memory does this node produce? | |
322 | |
323 // Many calls take *all* of memory as input, | |
324 // but some produce a limited subset of that memory as output. | |
325 // The adr_type reports the call's behavior as a store, not a load. | |
326 | |
327 virtual JVMState* jvms() const { return _jvms; } | |
328 void set_jvms(JVMState* s) { | |
329 *(JVMState**)&_jvms = s; // override const attribute in the accessor | |
330 } | |
331 OopMap *oop_map() const { return _oop_map; } | |
332 void set_oop_map(OopMap *om) { _oop_map = om; } | |
333 | |
334 // Functionality from old debug nodes which has changed | |
335 Node *local(JVMState* jvms, uint idx) const { | |
336 assert(verify_jvms(jvms), "jvms must match"); | |
337 return in(jvms->locoff() + idx); | |
338 } | |
339 Node *stack(JVMState* jvms, uint idx) const { | |
340 assert(verify_jvms(jvms), "jvms must match"); | |
341 return in(jvms->stkoff() + idx); | |
342 } | |
343 Node *argument(JVMState* jvms, uint idx) const { | |
344 assert(verify_jvms(jvms), "jvms must match"); | |
345 return in(jvms->argoff() + idx); | |
346 } | |
347 Node *monitor_box(JVMState* jvms, uint idx) const { | |
348 assert(verify_jvms(jvms), "jvms must match"); | |
349 return in(jvms->monitor_box_offset(idx)); | |
350 } | |
351 Node *monitor_obj(JVMState* jvms, uint idx) const { | |
352 assert(verify_jvms(jvms), "jvms must match"); | |
353 return in(jvms->monitor_obj_offset(idx)); | |
354 } | |
355 | |
356 void set_local(JVMState* jvms, uint idx, Node *c); | |
357 | |
358 void set_stack(JVMState* jvms, uint idx, Node *c) { | |
359 assert(verify_jvms(jvms), "jvms must match"); | |
360 set_req(jvms->stkoff() + idx, c); | |
361 } | |
362 void set_argument(JVMState* jvms, uint idx, Node *c) { | |
363 assert(verify_jvms(jvms), "jvms must match"); | |
364 set_req(jvms->argoff() + idx, c); | |
365 } | |
366 void ensure_stack(JVMState* jvms, uint stk_size) { | |
367 assert(verify_jvms(jvms), "jvms must match"); | |
368 int grow_by = (int)stk_size - (int)jvms->stk_size(); | |
369 if (grow_by > 0) grow_stack(jvms, grow_by); | |
370 } | |
371 void grow_stack(JVMState* jvms, uint grow_by); | |
372 // Handle monitor stack | |
373 void push_monitor( const FastLockNode *lock ); | |
374 void pop_monitor (); | |
375 Node *peek_monitor_box() const; | |
376 Node *peek_monitor_obj() const; | |
377 | |
378 // Access functions for the JVM | |
379 Node *control () const { return in(TypeFunc::Control ); } | |
380 Node *i_o () const { return in(TypeFunc::I_O ); } | |
381 Node *memory () const { return in(TypeFunc::Memory ); } | |
382 Node *returnadr() const { return in(TypeFunc::ReturnAdr); } | |
383 Node *frameptr () const { return in(TypeFunc::FramePtr ); } | |
384 | |
385 void set_control ( Node *c ) { set_req(TypeFunc::Control,c); } | |
386 void set_i_o ( Node *c ) { set_req(TypeFunc::I_O ,c); } | |
387 void set_memory ( Node *c ) { set_req(TypeFunc::Memory ,c); } | |
388 | |
389 MergeMemNode* merged_memory() const { | |
390 return in(TypeFunc::Memory)->as_MergeMem(); | |
391 } | |
392 | |
393 // The parser marks useless maps as dead when it's done with them: | |
394 bool is_killed() { return in(TypeFunc::Control) == NULL; } | |
395 | |
396 // Exception states bubbling out of subgraphs such as inlined calls | |
397 // are recorded here. (There might be more than one, hence the "next".) | |
398 // This feature is used only for safepoints which serve as "maps" | |
399 // for JVM states during parsing, intrinsic expansion, etc. | |
400 SafePointNode* next_exception() const; | |
401 void set_next_exception(SafePointNode* n); | |
402 bool has_exceptions() const { return next_exception() != NULL; } | |
403 | |
404 // Standard Node stuff | |
405 virtual int Opcode() const; | |
406 virtual bool pinned() const { return true; } | |
407 virtual const Type *Value( PhaseTransform *phase ) const; | |
408 virtual const Type *bottom_type() const { return Type::CONTROL; } | |
409 virtual const TypePtr *adr_type() const { return _adr_type; } | |
410 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); | |
411 virtual Node *Identity( PhaseTransform *phase ); | |
412 virtual uint ideal_reg() const { return 0; } | |
413 virtual const RegMask &in_RegMask(uint) const; | |
414 virtual const RegMask &out_RegMask() const; | |
415 virtual uint match_edge(uint idx) const; | |
416 | |
417 static bool needs_polling_address_input(); | |
418 | |
419 #ifndef PRODUCT | |
420 virtual void dump_spec(outputStream *st) const; | |
421 #endif | |
422 }; | |
423 | |
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424 //------------------------------SafePointScalarObjectNode---------------------- |
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425 // A SafePointScalarObjectNode represents the state of a scalarized object |
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426 // at a safepoint. |
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427 |
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428 class SafePointScalarObjectNode: public TypeNode { |
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429 uint _first_index; // First input edge index of a SafePoint node where |
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430 // states of the scalarized object fields are collected. |
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431 uint _n_fields; // Number of non-static fields of the scalarized object. |
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432 DEBUG_ONLY(AllocateNode* _alloc;) |
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433 public: |
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434 SafePointScalarObjectNode(const TypeOopPtr* tp, |
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435 #ifdef ASSERT |
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436 AllocateNode* alloc, |
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437 #endif |
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438 uint first_index, uint n_fields); |
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439 virtual int Opcode() const; |
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440 virtual uint ideal_reg() const; |
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441 virtual const RegMask &in_RegMask(uint) const; |
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442 virtual const RegMask &out_RegMask() const; |
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443 virtual uint match_edge(uint idx) const; |
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444 |
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445 uint first_index() const { return _first_index; } |
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446 uint n_fields() const { return _n_fields; } |
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447 DEBUG_ONLY(AllocateNode* alloc() const { return _alloc; }) |
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448 |
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449 // SafePointScalarObject should be always pinned to the control edge |
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450 // of the SafePoint node for which it was generated. |
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451 virtual bool pinned() const; // { return true; } |
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452 |
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453 // SafePointScalarObject depends on the SafePoint node |
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454 // for which it was generated. |
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455 virtual bool depends_only_on_test() const; // { return false; } |
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456 |
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457 virtual uint size_of() const { return sizeof(*this); } |
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458 |
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459 // Assumes that "this" is an argument to a safepoint node "s", and that |
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460 // "new_call" is being created to correspond to "s". But the difference |
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461 // between the start index of the jvmstates of "new_call" and "s" is |
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462 // "jvms_adj". Produce and return a SafePointScalarObjectNode that |
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463 // corresponds appropriately to "this" in "new_call". Assumes that |
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464 // "sosn_map" is a map, specific to the translation of "s" to "new_call", |
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465 // mapping old SafePointScalarObjectNodes to new, to avoid multiple copies. |
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466 SafePointScalarObjectNode* clone(int jvms_adj, Dict* sosn_map) const; |
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467 |
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468 #ifndef PRODUCT |
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469 virtual void dump_spec(outputStream *st) const; |
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470 #endif |
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471 }; |
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472 |
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473 |
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474 // Simple container for the outgoing projections of a call. Useful |
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475 // for serious surgery on calls. |
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476 class CallProjections : public StackObj { |
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477 public: |
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478 Node* fallthrough_proj; |
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479 Node* fallthrough_catchproj; |
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480 Node* fallthrough_memproj; |
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481 Node* fallthrough_ioproj; |
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482 Node* catchall_catchproj; |
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483 Node* catchall_memproj; |
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484 Node* catchall_ioproj; |
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485 Node* resproj; |
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486 Node* exobj; |
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487 }; |
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488 |
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489 |
0 | 490 //------------------------------CallNode--------------------------------------- |
491 // Call nodes now subsume the function of debug nodes at callsites, so they | |
492 // contain the functionality of a full scope chain of debug nodes. | |
493 class CallNode : public SafePointNode { | |
494 public: | |
495 const TypeFunc *_tf; // Function type | |
496 address _entry_point; // Address of method being called | |
497 float _cnt; // Estimate of number of times called | |
498 | |
499 CallNode(const TypeFunc* tf, address addr, const TypePtr* adr_type) | |
500 : SafePointNode(tf->domain()->cnt(), NULL, adr_type), | |
501 _tf(tf), | |
502 _entry_point(addr), | |
503 _cnt(COUNT_UNKNOWN) | |
504 { | |
505 init_class_id(Class_Call); | |
506 init_flags(Flag_is_Call); | |
507 } | |
508 | |
509 const TypeFunc* tf() const { return _tf; } | |
510 const address entry_point() const { return _entry_point; } | |
511 const float cnt() const { return _cnt; } | |
512 | |
513 void set_tf(const TypeFunc* tf) { _tf = tf; } | |
514 void set_entry_point(address p) { _entry_point = p; } | |
515 void set_cnt(float c) { _cnt = c; } | |
516 | |
517 virtual const Type *bottom_type() const; | |
518 virtual const Type *Value( PhaseTransform *phase ) const; | |
519 virtual Node *Identity( PhaseTransform *phase ) { return this; } | |
520 virtual uint cmp( const Node &n ) const; | |
521 virtual uint size_of() const = 0; | |
522 virtual void calling_convention( BasicType* sig_bt, VMRegPair *parm_regs, uint argcnt ) const; | |
523 virtual Node *match( const ProjNode *proj, const Matcher *m ); | |
524 virtual uint ideal_reg() const { return NotAMachineReg; } | |
525 // Are we guaranteed that this node is a safepoint? Not true for leaf calls and | |
526 // for some macro nodes whose expansion does not have a safepoint on the fast path. | |
527 virtual bool guaranteed_safepoint() { return true; } | |
528 // For macro nodes, the JVMState gets modified during expansion, so when cloning | |
529 // the node the JVMState must be cloned. | |
530 virtual void clone_jvms() { } // default is not to clone | |
531 | |
65 | 532 // Returns true if the call may modify n |
533 virtual bool may_modify(const TypePtr *addr_t, PhaseTransform *phase); | |
534 // Does this node have a use of n other than in debug information? | |
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535 bool has_non_debug_use(Node *n); |
65 | 536 // Returns the unique CheckCastPP of a call |
537 // or result projection is there are several CheckCastPP | |
538 // or returns NULL if there is no one. | |
539 Node *result_cast(); | |
540 | |
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541 // Collect all the interesting edges from a call for use in |
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542 // replacing the call by something else. Used by macro expansion |
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543 // and the late inlining support. |
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544 void extract_projections(CallProjections* projs, bool separate_io_proj); |
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545 |
0 | 546 virtual uint match_edge(uint idx) const; |
547 | |
548 #ifndef PRODUCT | |
549 virtual void dump_req() const; | |
550 virtual void dump_spec(outputStream *st) const; | |
551 #endif | |
552 }; | |
553 | |
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554 |
0 | 555 //------------------------------CallJavaNode----------------------------------- |
556 // Make a static or dynamic subroutine call node using Java calling | |
557 // convention. (The "Java" calling convention is the compiler's calling | |
558 // convention, as opposed to the interpreter's or that of native C.) | |
559 class CallJavaNode : public CallNode { | |
560 protected: | |
561 virtual uint cmp( const Node &n ) const; | |
562 virtual uint size_of() const; // Size is bigger | |
563 | |
564 bool _optimized_virtual; | |
565 ciMethod* _method; // Method being direct called | |
566 public: | |
567 const int _bci; // Byte Code Index of call byte code | |
568 CallJavaNode(const TypeFunc* tf , address addr, ciMethod* method, int bci) | |
569 : CallNode(tf, addr, TypePtr::BOTTOM), | |
570 _method(method), _bci(bci), _optimized_virtual(false) | |
571 { | |
572 init_class_id(Class_CallJava); | |
573 } | |
574 | |
575 virtual int Opcode() const; | |
576 ciMethod* method() const { return _method; } | |
577 void set_method(ciMethod *m) { _method = m; } | |
578 void set_optimized_virtual(bool f) { _optimized_virtual = f; } | |
579 bool is_optimized_virtual() const { return _optimized_virtual; } | |
580 | |
581 #ifndef PRODUCT | |
582 virtual void dump_spec(outputStream *st) const; | |
583 #endif | |
584 }; | |
585 | |
586 //------------------------------CallStaticJavaNode----------------------------- | |
587 // Make a direct subroutine call using Java calling convention (for static | |
588 // calls and optimized virtual calls, plus calls to wrappers for run-time | |
589 // routines); generates static stub. | |
590 class CallStaticJavaNode : public CallJavaNode { | |
591 virtual uint cmp( const Node &n ) const; | |
592 virtual uint size_of() const; // Size is bigger | |
593 public: | |
594 CallStaticJavaNode(const TypeFunc* tf, address addr, ciMethod* method, int bci) | |
595 : CallJavaNode(tf, addr, method, bci), _name(NULL) { | |
596 init_class_id(Class_CallStaticJava); | |
597 } | |
598 CallStaticJavaNode(const TypeFunc* tf, address addr, const char* name, int bci, | |
599 const TypePtr* adr_type) | |
600 : CallJavaNode(tf, addr, NULL, bci), _name(name) { | |
601 init_class_id(Class_CallStaticJava); | |
602 // This node calls a runtime stub, which often has narrow memory effects. | |
603 _adr_type = adr_type; | |
604 } | |
605 const char *_name; // Runtime wrapper name | |
606 | |
607 // If this is an uncommon trap, return the request code, else zero. | |
608 int uncommon_trap_request() const; | |
609 static int extract_uncommon_trap_request(const Node* call); | |
610 | |
611 virtual int Opcode() const; | |
612 #ifndef PRODUCT | |
613 virtual void dump_spec(outputStream *st) const; | |
614 #endif | |
615 }; | |
616 | |
617 //------------------------------CallDynamicJavaNode---------------------------- | |
618 // Make a dispatched call using Java calling convention. | |
619 class CallDynamicJavaNode : public CallJavaNode { | |
620 virtual uint cmp( const Node &n ) const; | |
621 virtual uint size_of() const; // Size is bigger | |
622 public: | |
623 CallDynamicJavaNode( const TypeFunc *tf , address addr, ciMethod* method, int vtable_index, int bci ) : CallJavaNode(tf,addr,method,bci), _vtable_index(vtable_index) { | |
624 init_class_id(Class_CallDynamicJava); | |
625 } | |
626 | |
627 int _vtable_index; | |
628 virtual int Opcode() const; | |
629 #ifndef PRODUCT | |
630 virtual void dump_spec(outputStream *st) const; | |
631 #endif | |
632 }; | |
633 | |
634 //------------------------------CallRuntimeNode-------------------------------- | |
635 // Make a direct subroutine call node into compiled C++ code. | |
636 class CallRuntimeNode : public CallNode { | |
637 virtual uint cmp( const Node &n ) const; | |
638 virtual uint size_of() const; // Size is bigger | |
639 public: | |
640 CallRuntimeNode(const TypeFunc* tf, address addr, const char* name, | |
641 const TypePtr* adr_type) | |
642 : CallNode(tf, addr, adr_type), | |
643 _name(name) | |
644 { | |
645 init_class_id(Class_CallRuntime); | |
646 } | |
647 | |
648 const char *_name; // Printable name, if _method is NULL | |
649 virtual int Opcode() const; | |
650 virtual void calling_convention( BasicType* sig_bt, VMRegPair *parm_regs, uint argcnt ) const; | |
651 | |
652 #ifndef PRODUCT | |
653 virtual void dump_spec(outputStream *st) const; | |
654 #endif | |
655 }; | |
656 | |
657 //------------------------------CallLeafNode----------------------------------- | |
658 // Make a direct subroutine call node into compiled C++ code, without | |
659 // safepoints | |
660 class CallLeafNode : public CallRuntimeNode { | |
661 public: | |
662 CallLeafNode(const TypeFunc* tf, address addr, const char* name, | |
663 const TypePtr* adr_type) | |
664 : CallRuntimeNode(tf, addr, name, adr_type) | |
665 { | |
666 init_class_id(Class_CallLeaf); | |
667 } | |
668 virtual int Opcode() const; | |
669 virtual bool guaranteed_safepoint() { return false; } | |
670 #ifndef PRODUCT | |
671 virtual void dump_spec(outputStream *st) const; | |
672 #endif | |
673 }; | |
674 | |
675 //------------------------------CallLeafNoFPNode------------------------------- | |
676 // CallLeafNode, not using floating point or using it in the same manner as | |
677 // the generated code | |
678 class CallLeafNoFPNode : public CallLeafNode { | |
679 public: | |
680 CallLeafNoFPNode(const TypeFunc* tf, address addr, const char* name, | |
681 const TypePtr* adr_type) | |
682 : CallLeafNode(tf, addr, name, adr_type) | |
683 { | |
684 } | |
685 virtual int Opcode() const; | |
686 }; | |
687 | |
688 | |
689 //------------------------------Allocate--------------------------------------- | |
690 // High-level memory allocation | |
691 // | |
692 // AllocateNode and AllocateArrayNode are subclasses of CallNode because they will | |
693 // get expanded into a code sequence containing a call. Unlike other CallNodes, | |
694 // they have 2 memory projections and 2 i_o projections (which are distinguished by | |
695 // the _is_io_use flag in the projection.) This is needed when expanding the node in | |
696 // order to differentiate the uses of the projection on the normal control path from | |
697 // those on the exception return path. | |
698 // | |
699 class AllocateNode : public CallNode { | |
700 public: | |
701 enum { | |
702 // Output: | |
703 RawAddress = TypeFunc::Parms, // the newly-allocated raw address | |
704 // Inputs: | |
705 AllocSize = TypeFunc::Parms, // size (in bytes) of the new object | |
706 KlassNode, // type (maybe dynamic) of the obj. | |
707 InitialTest, // slow-path test (may be constant) | |
708 ALength, // array length (or TOP if none) | |
709 ParmLimit | |
710 }; | |
711 | |
712 static const TypeFunc* alloc_type() { | |
713 const Type** fields = TypeTuple::fields(ParmLimit - TypeFunc::Parms); | |
714 fields[AllocSize] = TypeInt::POS; | |
715 fields[KlassNode] = TypeInstPtr::NOTNULL; | |
716 fields[InitialTest] = TypeInt::BOOL; | |
717 fields[ALength] = TypeInt::INT; // length (can be a bad length) | |
718 | |
719 const TypeTuple *domain = TypeTuple::make(ParmLimit, fields); | |
720 | |
721 // create result type (range) | |
722 fields = TypeTuple::fields(1); | |
723 fields[TypeFunc::Parms+0] = TypeRawPtr::NOTNULL; // Returned oop | |
724 | |
725 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+1, fields); | |
726 | |
727 return TypeFunc::make(domain, range); | |
728 } | |
729 | |
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730 bool _is_scalar_replaceable; // Result of Escape Analysis |
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731 |
0 | 732 virtual uint size_of() const; // Size is bigger |
733 AllocateNode(Compile* C, const TypeFunc *atype, Node *ctrl, Node *mem, Node *abio, | |
734 Node *size, Node *klass_node, Node *initial_test); | |
735 // Expansion modifies the JVMState, so we need to clone it | |
736 virtual void clone_jvms() { | |
737 set_jvms(jvms()->clone_deep(Compile::current())); | |
738 } | |
739 virtual int Opcode() const; | |
740 virtual uint ideal_reg() const { return Op_RegP; } | |
741 virtual bool guaranteed_safepoint() { return false; } | |
742 | |
65 | 743 // allocations do not modify their arguments |
744 virtual bool may_modify(const TypePtr *addr_t, PhaseTransform *phase) { return false;} | |
745 | |
0 | 746 // Pattern-match a possible usage of AllocateNode. |
747 // Return null if no allocation is recognized. | |
748 // The operand is the pointer produced by the (possible) allocation. | |
749 // It must be a projection of the Allocate or its subsequent CastPP. | |
750 // (Note: This function is defined in file graphKit.cpp, near | |
751 // GraphKit::new_instance/new_array, whose output it recognizes.) | |
752 // The 'ptr' may not have an offset unless the 'offset' argument is given. | |
753 static AllocateNode* Ideal_allocation(Node* ptr, PhaseTransform* phase); | |
754 | |
755 // Fancy version which uses AddPNode::Ideal_base_and_offset to strip | |
756 // an offset, which is reported back to the caller. | |
757 // (Note: AllocateNode::Ideal_allocation is defined in graphKit.cpp.) | |
758 static AllocateNode* Ideal_allocation(Node* ptr, PhaseTransform* phase, | |
759 intptr_t& offset); | |
760 | |
761 // Dig the klass operand out of a (possible) allocation site. | |
762 static Node* Ideal_klass(Node* ptr, PhaseTransform* phase) { | |
763 AllocateNode* allo = Ideal_allocation(ptr, phase); | |
764 return (allo == NULL) ? NULL : allo->in(KlassNode); | |
765 } | |
766 | |
767 // Conservatively small estimate of offset of first non-header byte. | |
768 int minimum_header_size() { | |
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769 return is_AllocateArray() ? arrayOopDesc::base_offset_in_bytes(T_BYTE) : |
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770 instanceOopDesc::base_offset_in_bytes(); |
0 | 771 } |
772 | |
773 // Return the corresponding initialization barrier (or null if none). | |
774 // Walks out edges to find it... | |
775 // (Note: Both InitializeNode::allocation and AllocateNode::initialization | |
776 // are defined in graphKit.cpp, which sets up the bidirectional relation.) | |
777 InitializeNode* initialization(); | |
778 | |
779 // Convenience for initialization->maybe_set_complete(phase) | |
780 bool maybe_set_complete(PhaseGVN* phase); | |
781 }; | |
782 | |
783 //------------------------------AllocateArray--------------------------------- | |
784 // | |
785 // High-level array allocation | |
786 // | |
787 class AllocateArrayNode : public AllocateNode { | |
788 public: | |
789 AllocateArrayNode(Compile* C, const TypeFunc *atype, Node *ctrl, Node *mem, Node *abio, | |
790 Node* size, Node* klass_node, Node* initial_test, | |
791 Node* count_val | |
792 ) | |
793 : AllocateNode(C, atype, ctrl, mem, abio, size, klass_node, | |
794 initial_test) | |
795 { | |
796 init_class_id(Class_AllocateArray); | |
797 set_req(AllocateNode::ALength, count_val); | |
798 } | |
799 virtual int Opcode() const; | |
800 virtual uint size_of() const; // Size is bigger | |
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801 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); |
0 | 802 |
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803 // Dig the length operand out of a array allocation site. |
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804 Node* Ideal_length() { |
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805 return in(AllocateNode::ALength); |
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806 } |
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807 |
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808 // Dig the length operand out of a array allocation site and narrow the |
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809 // type with a CastII, if necesssary |
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810 Node* make_ideal_length(const TypeOopPtr* ary_type, PhaseTransform *phase, bool can_create = true); |
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811 |
0 | 812 // Pattern-match a possible usage of AllocateArrayNode. |
813 // Return null if no allocation is recognized. | |
814 static AllocateArrayNode* Ideal_array_allocation(Node* ptr, PhaseTransform* phase) { | |
815 AllocateNode* allo = Ideal_allocation(ptr, phase); | |
816 return (allo == NULL || !allo->is_AllocateArray()) | |
817 ? NULL : allo->as_AllocateArray(); | |
818 } | |
819 }; | |
820 | |
821 //------------------------------AbstractLockNode----------------------------------- | |
822 class AbstractLockNode: public CallNode { | |
823 private: | |
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824 bool _eliminate; // indicates this lock can be safely eliminated |
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825 bool _coarsened; // indicates this lock was coarsened |
0 | 826 #ifndef PRODUCT |
827 NamedCounter* _counter; | |
828 #endif | |
829 | |
830 protected: | |
831 // helper functions for lock elimination | |
832 // | |
833 | |
834 bool find_matching_unlock(const Node* ctrl, LockNode* lock, | |
835 GrowableArray<AbstractLockNode*> &lock_ops); | |
836 bool find_lock_and_unlock_through_if(Node* node, LockNode* lock, | |
837 GrowableArray<AbstractLockNode*> &lock_ops); | |
838 bool find_unlocks_for_region(const RegionNode* region, LockNode* lock, | |
839 GrowableArray<AbstractLockNode*> &lock_ops); | |
840 LockNode *find_matching_lock(UnlockNode* unlock); | |
841 | |
842 | |
843 public: | |
844 AbstractLockNode(const TypeFunc *tf) | |
845 : CallNode(tf, NULL, TypeRawPtr::BOTTOM), | |
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846 _coarsened(false), |
0 | 847 _eliminate(false) |
848 { | |
849 #ifndef PRODUCT | |
850 _counter = NULL; | |
851 #endif | |
852 } | |
853 virtual int Opcode() const = 0; | |
854 Node * obj_node() const {return in(TypeFunc::Parms + 0); } | |
855 Node * box_node() const {return in(TypeFunc::Parms + 1); } | |
856 Node * fastlock_node() const {return in(TypeFunc::Parms + 2); } | |
857 const Type *sub(const Type *t1, const Type *t2) const { return TypeInt::CC;} | |
858 | |
859 virtual uint size_of() const { return sizeof(*this); } | |
860 | |
861 bool is_eliminated() {return _eliminate; } | |
862 // mark node as eliminated and update the counter if there is one | |
863 void set_eliminated(); | |
864 | |
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865 bool is_coarsened() { return _coarsened; } |
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866 void set_coarsened() { _coarsened = true; } |
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867 |
65 | 868 // locking does not modify its arguments |
869 virtual bool may_modify(const TypePtr *addr_t, PhaseTransform *phase){ return false;} | |
870 | |
0 | 871 #ifndef PRODUCT |
872 void create_lock_counter(JVMState* s); | |
873 NamedCounter* counter() const { return _counter; } | |
874 #endif | |
875 }; | |
876 | |
877 //------------------------------Lock--------------------------------------- | |
878 // High-level lock operation | |
879 // | |
880 // This is a subclass of CallNode because it is a macro node which gets expanded | |
881 // into a code sequence containing a call. This node takes 3 "parameters": | |
882 // 0 - object to lock | |
883 // 1 - a BoxLockNode | |
884 // 2 - a FastLockNode | |
885 // | |
886 class LockNode : public AbstractLockNode { | |
887 public: | |
888 | |
889 static const TypeFunc *lock_type() { | |
890 // create input type (domain) | |
891 const Type **fields = TypeTuple::fields(3); | |
892 fields[TypeFunc::Parms+0] = TypeInstPtr::NOTNULL; // Object to be Locked | |
893 fields[TypeFunc::Parms+1] = TypeRawPtr::BOTTOM; // Address of stack location for lock | |
894 fields[TypeFunc::Parms+2] = TypeInt::BOOL; // FastLock | |
895 const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+3,fields); | |
896 | |
897 // create result type (range) | |
898 fields = TypeTuple::fields(0); | |
899 | |
900 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+0,fields); | |
901 | |
902 return TypeFunc::make(domain,range); | |
903 } | |
904 | |
905 virtual int Opcode() const; | |
906 virtual uint size_of() const; // Size is bigger | |
907 LockNode(Compile* C, const TypeFunc *tf) : AbstractLockNode( tf ) { | |
908 init_class_id(Class_Lock); | |
909 init_flags(Flag_is_macro); | |
910 C->add_macro_node(this); | |
911 } | |
912 virtual bool guaranteed_safepoint() { return false; } | |
913 | |
914 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); | |
915 // Expansion modifies the JVMState, so we need to clone it | |
916 virtual void clone_jvms() { | |
917 set_jvms(jvms()->clone_deep(Compile::current())); | |
918 } | |
919 }; | |
920 | |
921 //------------------------------Unlock--------------------------------------- | |
922 // High-level unlock operation | |
923 class UnlockNode : public AbstractLockNode { | |
924 public: | |
925 virtual int Opcode() const; | |
926 virtual uint size_of() const; // Size is bigger | |
927 UnlockNode(Compile* C, const TypeFunc *tf) : AbstractLockNode( tf ) { | |
928 init_class_id(Class_Unlock); | |
929 init_flags(Flag_is_macro); | |
930 C->add_macro_node(this); | |
931 } | |
932 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); | |
933 // unlock is never a safepoint | |
934 virtual bool guaranteed_safepoint() { return false; } | |
935 }; |