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comparison: src/share/vm/opto/callnode.hpp

src/share/vm/opto/callnode.hpp

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1 /*
2 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #ifndef SHARE_VM_OPTO_CALLNODE_HPP
26 #define SHARE_VM_OPTO_CALLNODE_HPP
27
28 #include "opto/connode.hpp"
29 #include "opto/mulnode.hpp"
30 #include "opto/multnode.hpp"
31 #include "opto/opcodes.hpp"
32 #include "opto/phaseX.hpp"
33 #include "opto/type.hpp"
34
35 // Portions of code courtesy of Clifford Click
36
37 // Optimization - Graph Style
38
39 class Chaitin;
40 class NamedCounter;
41 class MultiNode;
42 class SafePointNode;
43 class CallNode;
44 class CallJavaNode;
45 class CallStaticJavaNode;
46 class CallDynamicJavaNode;
47 class CallRuntimeNode;
48 class CallLeafNode;
49 class CallLeafNoFPNode;
50 class AllocateNode;
51 class AllocateArrayNode;
52 class BoxLockNode;
53 class LockNode;
54 class UnlockNode;
55 class JVMState;
56 class OopMap;
57 class State;
58 class StartNode;
59 class MachCallNode;
60 class FastLockNode;
61
62 //------------------------------StartNode--------------------------------------
63 // The method start node
64 class StartNode : public MultiNode {
65 virtual uint cmp( const Node &n ) const;
66 virtual uint size_of() const; // Size is bigger
67 public:
68 const TypeTuple *_domain;
69 StartNode( Node *root, const TypeTuple *domain ) : MultiNode(2), _domain(domain) {
70 init_class_id(Class_Start);
71 init_req(0,this);
72 init_req(1,root);
73 }
74 virtual int Opcode() const;
75 virtual bool pinned() const { return true; };
76 virtual const Type *bottom_type() const;
77 virtual const TypePtr *adr_type() const { return TypePtr::BOTTOM; }
78 virtual const Type *Value( PhaseTransform *phase ) const;
79 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
80 virtual void calling_convention( BasicType* sig_bt, VMRegPair *parm_reg, uint length ) const;
81 virtual const RegMask &in_RegMask(uint) const;
82 virtual Node *match( const ProjNode *proj, const Matcher *m );
83 virtual uint ideal_reg() const { return 0; }
84 #ifndef PRODUCT
85 virtual void dump_spec(outputStream *st) const;
86 #endif
87 };
88
89 //------------------------------StartOSRNode-----------------------------------
90 // The method start node for on stack replacement code
91 class StartOSRNode : public StartNode {
92 public:
93 StartOSRNode( Node *root, const TypeTuple *domain ) : StartNode(root, domain) {}
94 virtual int Opcode() const;
95 static const TypeTuple *osr_domain();
96 };
97
98
99 //------------------------------ParmNode---------------------------------------
100 // Incoming parameters
101 class ParmNode : public ProjNode {
102 static const char * const names[TypeFunc::Parms+1];
103 public:
104 ParmNode( StartNode *src, uint con ) : ProjNode(src,con) {
105 init_class_id(Class_Parm);
106 }
107 virtual int Opcode() const;
108 virtual bool is_CFG() const { return (_con == TypeFunc::Control); }
109 virtual uint ideal_reg() const;
110 #ifndef PRODUCT
111 virtual void dump_spec(outputStream *st) const;
112 #endif
113 };
114
115
116 //------------------------------ReturnNode-------------------------------------
117 // Return from subroutine node
118 class ReturnNode : public Node {
119 public:
120 ReturnNode( uint edges, Node *cntrl, Node *i_o, Node *memory, Node *retadr, Node *frameptr );
121 virtual int Opcode() const;
122 virtual bool is_CFG() const { return true; }
123 virtual uint hash() const { return NO_HASH; } // CFG nodes do not hash
124 virtual bool depends_only_on_test() const { return false; }
125 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
126 virtual const Type *Value( PhaseTransform *phase ) const;
127 virtual uint ideal_reg() const { return NotAMachineReg; }
128 virtual uint match_edge(uint idx) const;
129 #ifndef PRODUCT
130 virtual void dump_req(outputStream *st = tty) const;
131 #endif
132 };
133
134
135 //------------------------------RethrowNode------------------------------------
136 // Rethrow of exception at call site. Ends a procedure before rethrowing;
137 // ends the current basic block like a ReturnNode. Restores registers and
138 // unwinds stack. Rethrow happens in the caller's method.
139 class RethrowNode : public Node {
140 public:
141 RethrowNode( Node *cntrl, Node *i_o, Node *memory, Node *frameptr, Node *ret_adr, Node *exception );
142 virtual int Opcode() const;
143 virtual bool is_CFG() const { return true; }
144 virtual uint hash() const { return NO_HASH; } // CFG nodes do not hash
145 virtual bool depends_only_on_test() const { return false; }
146 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
147 virtual const Type *Value( PhaseTransform *phase ) const;
148 virtual uint match_edge(uint idx) const;
149 virtual uint ideal_reg() const { return NotAMachineReg; }
150 #ifndef PRODUCT
151 virtual void dump_req(outputStream *st = tty) const;
152 #endif
153 };
154
155
156 //------------------------------TailCallNode-----------------------------------
157 // Pop stack frame and jump indirect
158 class TailCallNode : public ReturnNode {
159 public:
160 TailCallNode( Node *cntrl, Node *i_o, Node *memory, Node *frameptr, Node *retadr, Node *target, Node *moop )
161 : ReturnNode( TypeFunc::Parms+2, cntrl, i_o, memory, frameptr, retadr ) {
162 init_req(TypeFunc::Parms, target);
163 init_req(TypeFunc::Parms+1, moop);
164 }
165
166 virtual int Opcode() const;
167 virtual uint match_edge(uint idx) const;
168 };
169
170 //------------------------------TailJumpNode-----------------------------------
171 // Pop stack frame and jump indirect
172 class TailJumpNode : public ReturnNode {
173 public:
174 TailJumpNode( Node *cntrl, Node *i_o, Node *memory, Node *frameptr, Node *target, Node *ex_oop)
175 : ReturnNode(TypeFunc::Parms+2, cntrl, i_o, memory, frameptr, Compile::current()->top()) {
176 init_req(TypeFunc::Parms, target);
177 init_req(TypeFunc::Parms+1, ex_oop);
178 }
179
180 virtual int Opcode() const;
181 virtual uint match_edge(uint idx) const;
182 };
183
184 //-------------------------------JVMState-------------------------------------
185 // A linked list of JVMState nodes captures the whole interpreter state,
186 // plus GC roots, for all active calls at some call site in this compilation
187 // unit. (If there is no inlining, then the list has exactly one link.)
188 // This provides a way to map the optimized program back into the interpreter,
189 // or to let the GC mark the stack.
190 class JVMState : public ResourceObj {
191 friend class VMStructs;
192 public:
193 typedef enum {
194 Reexecute_Undefined = -1, // not defined -- will be translated into false later
195 Reexecute_False = 0, // false -- do not reexecute
196 Reexecute_True = 1 // true -- reexecute the bytecode
197 } ReexecuteState; //Reexecute State
198
199 private:
200 JVMState* _caller; // List pointer for forming scope chains
201 uint _depth; // One more than caller depth, or one.
202 uint _locoff; // Offset to locals in input edge mapping
203 uint _stkoff; // Offset to stack in input edge mapping
204 uint _monoff; // Offset to monitors in input edge mapping
205 uint _scloff; // Offset to fields of scalar objs in input edge mapping
206 uint _endoff; // Offset to end of input edge mapping
207 uint _sp; // Jave Expression Stack Pointer for this state
208 int _bci; // Byte Code Index of this JVM point
209 ReexecuteState _reexecute; // Whether this bytecode need to be re-executed
210 ciMethod* _method; // Method Pointer
211 SafePointNode* _map; // Map node associated with this scope
212 public:
213 friend class Compile;
214 friend class PreserveReexecuteState;
215
216 // Because JVMState objects live over the entire lifetime of the
217 // Compile object, they are allocated into the comp_arena, which
218 // does not get resource marked or reset during the compile process
219 void *operator new( size_t x, Compile* C ) throw() { return C->comp_arena()->Amalloc(x); }
220 void operator delete( void * ) { } // fast deallocation
221
222 // Create a new JVMState, ready for abstract interpretation.
223 JVMState(ciMethod* method, JVMState* caller);
224 JVMState(int stack_size); // root state; has a null method
225
226 // Access functions for the JVM
227 // ... --|--- loc ---|--- stk ---|--- arg ---|--- mon ---|--- scl ---|
228 // \ locoff \ stkoff \ argoff \ monoff \ scloff \ endoff
229 uint locoff() const { return _locoff; }
230 uint stkoff() const { return _stkoff; }
231 uint argoff() const { return _stkoff + _sp; }
232 uint monoff() const { return _monoff; }
233 uint scloff() const { return _scloff; }
234 uint endoff() const { return _endoff; }
235 uint oopoff() const { return debug_end(); }
236
237 int loc_size() const { return stkoff() - locoff(); }
238 int stk_size() const { return monoff() - stkoff(); }
239 int mon_size() const { return scloff() - monoff(); }
240 int scl_size() const { return endoff() - scloff(); }
241
242 bool is_loc(uint i) const { return locoff() <= i && i < stkoff(); }
243 bool is_stk(uint i) const { return stkoff() <= i && i < monoff(); }
244 bool is_mon(uint i) const { return monoff() <= i && i < scloff(); }
245 bool is_scl(uint i) const { return scloff() <= i && i < endoff(); }
246
247 uint sp() const { return _sp; }
248 int bci() const { return _bci; }
249 bool should_reexecute() const { return _reexecute==Reexecute_True; }
250 bool is_reexecute_undefined() const { return _reexecute==Reexecute_Undefined; }
251 bool has_method() const { return _method != NULL; }
252 ciMethod* method() const { assert(has_method(), ""); return _method; }
253 JVMState* caller() const { return _caller; }
254 SafePointNode* map() const { return _map; }
255 uint depth() const { return _depth; }
256 uint debug_start() const; // returns locoff of root caller
257 uint debug_end() const; // returns endoff of self
258 uint debug_size() const {
259 return loc_size() + sp() + mon_size() + scl_size();
260 }
261 uint debug_depth() const; // returns sum of debug_size values at all depths
262
263 // Returns the JVM state at the desired depth (1 == root).
264 JVMState* of_depth(int d) const;
265
266 // Tells if two JVM states have the same call chain (depth, methods, & bcis).
267 bool same_calls_as(const JVMState* that) const;
268
269 // Monitors (monitors are stored as (boxNode, objNode) pairs
270 enum { logMonitorEdges = 1 };
271 int nof_monitors() const { return mon_size() >> logMonitorEdges; }
272 int monitor_depth() const { return nof_monitors() + (caller() ? caller()->monitor_depth() : 0); }
273 int monitor_box_offset(int idx) const { return monoff() + (idx << logMonitorEdges) + 0; }
274 int monitor_obj_offset(int idx) const { return monoff() + (idx << logMonitorEdges) + 1; }
275 bool is_monitor_box(uint off) const {
276 assert(is_mon(off), "should be called only for monitor edge");
277 return (0 == bitfield(off - monoff(), 0, logMonitorEdges));
278 }
279 bool is_monitor_use(uint off) const { return (is_mon(off)
280 && is_monitor_box(off))
281 || (caller() && caller()->is_monitor_use(off)); }
282
283 // Initialization functions for the JVM
284 void set_locoff(uint off) { _locoff = off; }
285 void set_stkoff(uint off) { _stkoff = off; }
286 void set_monoff(uint off) { _monoff = off; }
287 void set_scloff(uint off) { _scloff = off; }
288 void set_endoff(uint off) { _endoff = off; }
289 void set_offsets(uint off) {
290 _locoff = _stkoff = _monoff = _scloff = _endoff = off;
291 }
292 void set_map(SafePointNode *map) { _map = map; }
293 void set_sp(uint sp) { _sp = sp; }
294 // _reexecute is initialized to "undefined" for a new bci
295 void set_bci(int bci) {if(_bci != bci)_reexecute=Reexecute_Undefined; _bci = bci; }
296 void set_should_reexecute(bool reexec) {_reexecute = reexec ? Reexecute_True : Reexecute_False;}
297
298 // Miscellaneous utility functions
299 JVMState* clone_deep(Compile* C) const; // recursively clones caller chain
300 JVMState* clone_shallow(Compile* C) const; // retains uncloned caller
301 void set_map_deep(SafePointNode *map);// reset map for all callers
302 void adapt_position(int delta); // Adapt offsets in in-array after adding an edge.
303 int interpreter_frame_size() const;
304
305 #ifndef PRODUCT
306 void format(PhaseRegAlloc *regalloc, const Node *n, outputStream* st) const;
307 void dump_spec(outputStream *st) const;
308 void dump_on(outputStream* st) const;
309 void dump() const {
310 dump_on(tty);
311 }
312 #endif
313 };
314
315 //------------------------------SafePointNode----------------------------------
316 // A SafePointNode is a subclass of a MultiNode for convenience (and
317 // potential code sharing) only - conceptually it is independent of
318 // the Node semantics.
319 class SafePointNode : public MultiNode {
320 virtual uint cmp( const Node &n ) const;
321 virtual uint size_of() const; // Size is bigger
322
323 public:
324 SafePointNode(uint edges, JVMState* jvms,
325 // A plain safepoint advertises no memory effects (NULL):
326 const TypePtr* adr_type = NULL)
327 : MultiNode( edges ),
328 _jvms(jvms),
329 _oop_map(NULL),
330 _adr_type(adr_type)
331 {
332 init_class_id(Class_SafePoint);
333 }
334
335 OopMap* _oop_map; // Array of OopMap info (8-bit char) for GC
336 JVMState* const _jvms; // Pointer to list of JVM State objects
337 const TypePtr* _adr_type; // What type of memory does this node produce?
338
339 // Many calls take *all* of memory as input,
340 // but some produce a limited subset of that memory as output.
341 // The adr_type reports the call's behavior as a store, not a load.
342
343 virtual JVMState* jvms() const { return _jvms; }
344 void set_jvms(JVMState* s) {
345 *(JVMState**)&_jvms = s; // override const attribute in the accessor
346 }
347 OopMap *oop_map() const { return _oop_map; }
348 void set_oop_map(OopMap *om) { _oop_map = om; }
349
350 private:
351 void verify_input(JVMState* jvms, uint idx) const {
352 assert(verify_jvms(jvms), "jvms must match");
353 Node* n = in(idx);
354 assert((!n->bottom_type()->isa_long() && !n->bottom_type()->isa_double()) ||
355 in(idx + 1)->is_top(), "2nd half of long/double");
356 }
357
358 public:
359 // Functionality from old debug nodes which has changed
360 Node *local(JVMState* jvms, uint idx) const {
361 verify_input(jvms, jvms->locoff() + idx);
362 return in(jvms->locoff() + idx);
363 }
364 Node *stack(JVMState* jvms, uint idx) const {
365 verify_input(jvms, jvms->stkoff() + idx);
366 return in(jvms->stkoff() + idx);
367 }
368 Node *argument(JVMState* jvms, uint idx) const {
369 verify_input(jvms, jvms->argoff() + idx);
370 return in(jvms->argoff() + idx);
371 }
372 Node *monitor_box(JVMState* jvms, uint idx) const {
373 assert(verify_jvms(jvms), "jvms must match");
374 return in(jvms->monitor_box_offset(idx));
375 }
376 Node *monitor_obj(JVMState* jvms, uint idx) const {
377 assert(verify_jvms(jvms), "jvms must match");
378 return in(jvms->monitor_obj_offset(idx));
379 }
380
381 void set_local(JVMState* jvms, uint idx, Node *c);
382
383 void set_stack(JVMState* jvms, uint idx, Node *c) {
384 assert(verify_jvms(jvms), "jvms must match");
385 set_req(jvms->stkoff() + idx, c);
386 }
387 void set_argument(JVMState* jvms, uint idx, Node *c) {
388 assert(verify_jvms(jvms), "jvms must match");
389 set_req(jvms->argoff() + idx, c);
390 }
391 void ensure_stack(JVMState* jvms, uint stk_size) {
392 assert(verify_jvms(jvms), "jvms must match");
393 int grow_by = (int)stk_size - (int)jvms->stk_size();
394 if (grow_by > 0) grow_stack(jvms, grow_by);
395 }
396 void grow_stack(JVMState* jvms, uint grow_by);
397 // Handle monitor stack
398 void push_monitor( const FastLockNode *lock );
399 void pop_monitor ();
400 Node *peek_monitor_box() const;
401 Node *peek_monitor_obj() const;
402
403 // Access functions for the JVM
404 Node *control () const { return in(TypeFunc::Control ); }
405 Node *i_o () const { return in(TypeFunc::I_O ); }
406 Node *memory () const { return in(TypeFunc::Memory ); }
407 Node *returnadr() const { return in(TypeFunc::ReturnAdr); }
408 Node *frameptr () const { return in(TypeFunc::FramePtr ); }
409
410 void set_control ( Node *c ) { set_req(TypeFunc::Control,c); }
411 void set_i_o ( Node *c ) { set_req(TypeFunc::I_O ,c); }
412 void set_memory ( Node *c ) { set_req(TypeFunc::Memory ,c); }
413
414 MergeMemNode* merged_memory() const {
415 return in(TypeFunc::Memory)->as_MergeMem();
416 }
417
418 // The parser marks useless maps as dead when it's done with them:
419 bool is_killed() { return in(TypeFunc::Control) == NULL; }
420
421 // Exception states bubbling out of subgraphs such as inlined calls
422 // are recorded here. (There might be more than one, hence the "next".)
423 // This feature is used only for safepoints which serve as "maps"
424 // for JVM states during parsing, intrinsic expansion, etc.
425 SafePointNode* next_exception() const;
426 void set_next_exception(SafePointNode* n);
427 bool has_exceptions() const { return next_exception() != NULL; }
428
429 // Standard Node stuff
430 virtual int Opcode() const;
431 virtual bool pinned() const { return true; }
432 virtual const Type *Value( PhaseTransform *phase ) const;
433 virtual const Type *bottom_type() const { return Type::CONTROL; }
434 virtual const TypePtr *adr_type() const { return _adr_type; }
435 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
436 virtual Node *Identity( PhaseTransform *phase );
437 virtual uint ideal_reg() const { return 0; }
438 virtual const RegMask &in_RegMask(uint) const;
439 virtual const RegMask &out_RegMask() const;
440 virtual uint match_edge(uint idx) const;
441
442 static bool needs_polling_address_input();
443
444 #ifndef PRODUCT
445 virtual void dump_spec(outputStream *st) const;
446 #endif
447 };
448
449 //------------------------------SafePointScalarObjectNode----------------------
450 // A SafePointScalarObjectNode represents the state of a scalarized object
451 // at a safepoint.
452
453 class SafePointScalarObjectNode: public TypeNode {
454 uint _first_index; // First input edge relative index of a SafePoint node where
455 // states of the scalarized object fields are collected.
456 // It is relative to the last (youngest) jvms->_scloff.
457 uint _n_fields; // Number of non-static fields of the scalarized object.
458 DEBUG_ONLY(AllocateNode* _alloc;)
459
460 virtual uint hash() const ; // { return NO_HASH; }
461 virtual uint cmp( const Node &n ) const;
462
463 uint first_index() const { return _first_index; }
464
465 public:
466 SafePointScalarObjectNode(const TypeOopPtr* tp,
467 #ifdef ASSERT
468 AllocateNode* alloc,
469 #endif
470 uint first_index, uint n_fields);
471 virtual int Opcode() const;
472 virtual uint ideal_reg() const;
473 virtual const RegMask &in_RegMask(uint) const;
474 virtual const RegMask &out_RegMask() const;
475 virtual uint match_edge(uint idx) const;
476
477 uint first_index(JVMState* jvms) const {
478 assert(jvms != NULL, "missed JVMS");
479 return jvms->scloff() + _first_index;
480 }
481 uint n_fields() const { return _n_fields; }
482
483 #ifdef ASSERT
484 AllocateNode* alloc() const { return _alloc; }
485 #endif
486
487 virtual uint size_of() const { return sizeof(*this); }
488
489 // Assumes that "this" is an argument to a safepoint node "s", and that
490 // "new_call" is being created to correspond to "s". But the difference
491 // between the start index of the jvmstates of "new_call" and "s" is
492 // "jvms_adj". Produce and return a SafePointScalarObjectNode that
493 // corresponds appropriately to "this" in "new_call". Assumes that
494 // "sosn_map" is a map, specific to the translation of "s" to "new_call",
495 // mapping old SafePointScalarObjectNodes to new, to avoid multiple copies.
496 SafePointScalarObjectNode* clone(Dict* sosn_map) const;
497
498 #ifndef PRODUCT
499 virtual void dump_spec(outputStream *st) const;
500 #endif
501 };
502
503
504 // Simple container for the outgoing projections of a call. Useful
505 // for serious surgery on calls.
506 class CallProjections : public StackObj {
507 public:
508 Node* fallthrough_proj;
509 Node* fallthrough_catchproj;
510 Node* fallthrough_memproj;
511 Node* fallthrough_ioproj;
512 Node* catchall_catchproj;
513 Node* catchall_memproj;
514 Node* catchall_ioproj;
515 Node* resproj;
516 Node* exobj;
517 };
518
519 class CallGenerator;
520
521 //------------------------------CallNode---------------------------------------
522 // Call nodes now subsume the function of debug nodes at callsites, so they
523 // contain the functionality of a full scope chain of debug nodes.
524 class CallNode : public SafePointNode {
525 friend class VMStructs;
526 public:
527 const TypeFunc *_tf; // Function type
528 address _entry_point; // Address of method being called
529 float _cnt; // Estimate of number of times called
530 CallGenerator* _generator; // corresponding CallGenerator for some late inline calls
531
532 CallNode(const TypeFunc* tf, address addr, const TypePtr* adr_type)
533 : SafePointNode(tf->domain()->cnt(), NULL, adr_type),
534 _tf(tf),
535 _entry_point(addr),
536 _cnt(COUNT_UNKNOWN),
537 _generator(NULL)
538 {
539 init_class_id(Class_Call);
540 }
541
542 const TypeFunc* tf() const { return _tf; }
543 const address entry_point() const { return _entry_point; }
544 const float cnt() const { return _cnt; }
545 CallGenerator* generator() const { return _generator; }
546
547 void set_tf(const TypeFunc* tf) { _tf = tf; }
548 void set_entry_point(address p) { _entry_point = p; }
549 void set_cnt(float c) { _cnt = c; }
550 void set_generator(CallGenerator* cg) { _generator = cg; }
551
552 virtual const Type *bottom_type() const;
553 virtual const Type *Value( PhaseTransform *phase ) const;
554 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
555 virtual Node *Identity( PhaseTransform *phase ) { return this; }
556 virtual uint cmp( const Node &n ) const;
557 virtual uint size_of() const = 0;
558 virtual void calling_convention( BasicType* sig_bt, VMRegPair *parm_regs, uint argcnt ) const;
559 virtual Node *match( const ProjNode *proj, const Matcher *m );
560 virtual uint ideal_reg() const { return NotAMachineReg; }
561 // Are we guaranteed that this node is a safepoint? Not true for leaf calls and
562 // for some macro nodes whose expansion does not have a safepoint on the fast path.
563 virtual bool guaranteed_safepoint() { return true; }
564 // For macro nodes, the JVMState gets modified during expansion. If calls
565 // use MachConstantBase, it gets modified during matching. So when cloning
566 // the node the JVMState must be cloned. Default is not to clone.
567 virtual void clone_jvms(Compile* C) {
568 if (C->needs_clone_jvms() && jvms() != NULL) {
569 set_jvms(jvms()->clone_deep(C));
570 jvms()->set_map_deep(this);
571 }
572 }
573
574 // Returns true if the call may modify n
575 virtual bool may_modify(const TypeOopPtr *t_oop, PhaseTransform *phase);
576 // Does this node have a use of n other than in debug information?
577 bool has_non_debug_use(Node *n);
578 // Returns the unique CheckCastPP of a call
579 // or result projection is there are several CheckCastPP
580 // or returns NULL if there is no one.
581 Node *result_cast();
582 // Does this node returns pointer?
583 bool returns_pointer() const {
584 const TypeTuple *r = tf()->range();
585 return (r->cnt() > TypeFunc::Parms &&
586 r->field_at(TypeFunc::Parms)->isa_ptr());
587 }
588
589 // Collect all the interesting edges from a call for use in
590 // replacing the call by something else. Used by macro expansion
591 // and the late inlining support.
592 void extract_projections(CallProjections* projs, bool separate_io_proj);
593
594 virtual uint match_edge(uint idx) const;
595
596 #ifndef PRODUCT
597 virtual void dump_req(outputStream *st = tty) const;
598 virtual void dump_spec(outputStream *st) const;
599 #endif
600 };
601
602
603 //------------------------------CallJavaNode-----------------------------------
604 // Make a static or dynamic subroutine call node using Java calling
605 // convention. (The "Java" calling convention is the compiler's calling
606 // convention, as opposed to the interpreter's or that of native C.)
607 class CallJavaNode : public CallNode {
608 friend class VMStructs;
609 protected:
610 virtual uint cmp( const Node &n ) const;
611 virtual uint size_of() const; // Size is bigger
612
613 bool _optimized_virtual;
614 bool _method_handle_invoke;
615 ciMethod* _method; // Method being direct called
616 public:
617 const int _bci; // Byte Code Index of call byte code
618 CallJavaNode(const TypeFunc* tf , address addr, ciMethod* method, int bci)
619 : CallNode(tf, addr, TypePtr::BOTTOM),
620 _method(method), _bci(bci),
621 _optimized_virtual(false),
622 _method_handle_invoke(false)
623 {
624 init_class_id(Class_CallJava);
625 }
626
627 virtual int Opcode() const;
628 ciMethod* method() const { return _method; }
629 void set_method(ciMethod *m) { _method = m; }
630 void set_optimized_virtual(bool f) { _optimized_virtual = f; }
631 bool is_optimized_virtual() const { return _optimized_virtual; }
632 void set_method_handle_invoke(bool f) { _method_handle_invoke = f; }
633 bool is_method_handle_invoke() const { return _method_handle_invoke; }
634
635 #ifndef PRODUCT
636 virtual void dump_spec(outputStream *st) const;
637 #endif
638 };
639
640 //------------------------------CallStaticJavaNode-----------------------------
641 // Make a direct subroutine call using Java calling convention (for static
642 // calls and optimized virtual calls, plus calls to wrappers for run-time
643 // routines); generates static stub.
644 class CallStaticJavaNode : public CallJavaNode {
645 virtual uint cmp( const Node &n ) const;
646 virtual uint size_of() const; // Size is bigger
647 public:
648 CallStaticJavaNode(Compile* C, const TypeFunc* tf, address addr, ciMethod* method, int bci)
649 : CallJavaNode(tf, addr, method, bci), _name(NULL) {
650 init_class_id(Class_CallStaticJava);
651 if (C->eliminate_boxing() && (method != NULL) && method->is_boxing_method()) {
652 init_flags(Flag_is_macro);
653 C->add_macro_node(this);
654 }
655 _is_scalar_replaceable = false;
656 _is_non_escaping = false;
657 }
658 CallStaticJavaNode(const TypeFunc* tf, address addr, const char* name, int bci,
659 const TypePtr* adr_type)
660 : CallJavaNode(tf, addr, NULL, bci), _name(name) {
661 init_class_id(Class_CallStaticJava);
662 // This node calls a runtime stub, which often has narrow memory effects.
663 _adr_type = adr_type;
664 _is_scalar_replaceable = false;
665 _is_non_escaping = false;
666 }
667 const char *_name; // Runtime wrapper name
668
669 // Result of Escape Analysis
670 bool _is_scalar_replaceable;
671 bool _is_non_escaping;
672
673 // If this is an uncommon trap, return the request code, else zero.
674 int uncommon_trap_request() const;
675 static int extract_uncommon_trap_request(const Node* call);
676
677 bool is_boxing_method() const {
678 return is_macro() && (method() != NULL) && method()->is_boxing_method();
679 }
680 // Later inlining modifies the JVMState, so we need to clone it
681 // when the call node is cloned (because it is macro node).
682 virtual void clone_jvms(Compile* C) {
683 if ((jvms() != NULL) && is_boxing_method()) {
684 set_jvms(jvms()->clone_deep(C));
685 jvms()->set_map_deep(this);
686 }
687 }
688
689 virtual int Opcode() const;
690 #ifndef PRODUCT
691 virtual void dump_spec(outputStream *st) const;
692 #endif
693 };
694
695 //------------------------------CallDynamicJavaNode----------------------------
696 // Make a dispatched call using Java calling convention.
697 class CallDynamicJavaNode : public CallJavaNode {
698 virtual uint cmp( const Node &n ) const;
699 virtual uint size_of() const; // Size is bigger
700 public:
701 CallDynamicJavaNode( const TypeFunc *tf , address addr, ciMethod* method, int vtable_index, int bci ) : CallJavaNode(tf,addr,method,bci), _vtable_index(vtable_index) {
702 init_class_id(Class_CallDynamicJava);
703 }
704
705 int _vtable_index;
706 virtual int Opcode() const;
707 #ifndef PRODUCT
708 virtual void dump_spec(outputStream *st) const;
709 #endif
710 };
711
712 //------------------------------CallRuntimeNode--------------------------------
713 // Make a direct subroutine call node into compiled C++ code.
714 class CallRuntimeNode : public CallNode {
715 virtual uint cmp( const Node &n ) const;
716 virtual uint size_of() const; // Size is bigger
717 public:
718 CallRuntimeNode(const TypeFunc* tf, address addr, const char* name,
719 const TypePtr* adr_type)
720 : CallNode(tf, addr, adr_type),
721 _name(name)
722 {
723 init_class_id(Class_CallRuntime);
724 }
725
726 const char *_name; // Printable name, if _method is NULL
727 virtual int Opcode() const;
728 virtual void calling_convention( BasicType* sig_bt, VMRegPair *parm_regs, uint argcnt ) const;
729
730 #ifndef PRODUCT
731 virtual void dump_spec(outputStream *st) const;
732 #endif
733 };
734
735 //------------------------------CallLeafNode-----------------------------------
736 // Make a direct subroutine call node into compiled C++ code, without
737 // safepoints
738 class CallLeafNode : public CallRuntimeNode {
739 public:
740 CallLeafNode(const TypeFunc* tf, address addr, const char* name,
741 const TypePtr* adr_type)
742 : CallRuntimeNode(tf, addr, name, adr_type)
743 {
744 init_class_id(Class_CallLeaf);
745 }
746 virtual int Opcode() const;
747 virtual bool guaranteed_safepoint() { return false; }
748 #ifndef PRODUCT
749 virtual void dump_spec(outputStream *st) const;
750 #endif
751 };
752
753 //------------------------------CallLeafNoFPNode-------------------------------
754 // CallLeafNode, not using floating point or using it in the same manner as
755 // the generated code
756 class CallLeafNoFPNode : public CallLeafNode {
757 public:
758 CallLeafNoFPNode(const TypeFunc* tf, address addr, const char* name,
759 const TypePtr* adr_type)
760 : CallLeafNode(tf, addr, name, adr_type)
761 {
762 }
763 virtual int Opcode() const;
764 };
765
766
767 //------------------------------Allocate---------------------------------------
768 // High-level memory allocation
769 //
770 // AllocateNode and AllocateArrayNode are subclasses of CallNode because they will
771 // get expanded into a code sequence containing a call. Unlike other CallNodes,
772 // they have 2 memory projections and 2 i_o projections (which are distinguished by
773 // the _is_io_use flag in the projection.) This is needed when expanding the node in
774 // order to differentiate the uses of the projection on the normal control path from
775 // those on the exception return path.
776 //
777 class AllocateNode : public CallNode {
778 public:
779 enum {
780 // Output:
781 RawAddress = TypeFunc::Parms, // the newly-allocated raw address
782 // Inputs:
783 AllocSize = TypeFunc::Parms, // size (in bytes) of the new object
784 KlassNode, // type (maybe dynamic) of the obj.
785 InitialTest, // slow-path test (may be constant)
786 ALength, // array length (or TOP if none)
787 ParmLimit
788 };
789
790 static const TypeFunc* alloc_type(const Type* t) {
791 const Type** fields = TypeTuple::fields(ParmLimit - TypeFunc::Parms);
792 fields[AllocSize] = TypeInt::POS;
793 fields[KlassNode] = TypeInstPtr::NOTNULL;
794 fields[InitialTest] = TypeInt::BOOL;
795 fields[ALength] = t; // length (can be a bad length)
796
797 const TypeTuple *domain = TypeTuple::make(ParmLimit, fields);
798
799 // create result type (range)
800 fields = TypeTuple::fields(1);
801 fields[TypeFunc::Parms+0] = TypeRawPtr::NOTNULL; // Returned oop
802
803 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+1, fields);
804
805 return TypeFunc::make(domain, range);
806 }
807
808 // Result of Escape Analysis
809 bool _is_scalar_replaceable;
810 bool _is_non_escaping;
811
812 virtual uint size_of() const; // Size is bigger
813 AllocateNode(Compile* C, const TypeFunc *atype, Node *ctrl, Node *mem, Node *abio,
814 Node *size, Node *klass_node, Node *initial_test);
815 // Expansion modifies the JVMState, so we need to clone it
816 virtual void clone_jvms(Compile* C) {
817 if (jvms() != NULL) {
818 set_jvms(jvms()->clone_deep(C));
819 jvms()->set_map_deep(this);
820 }
821 }
822 virtual int Opcode() const;
823 virtual uint ideal_reg() const { return Op_RegP; }
824 virtual bool guaranteed_safepoint() { return false; }
825
826 // allocations do not modify their arguments
827 virtual bool may_modify(const TypeOopPtr *t_oop, PhaseTransform *phase) { return false;}
828
829 // Pattern-match a possible usage of AllocateNode.
830 // Return null if no allocation is recognized.
831 // The operand is the pointer produced by the (possible) allocation.
832 // It must be a projection of the Allocate or its subsequent CastPP.
833 // (Note: This function is defined in file graphKit.cpp, near
834 // GraphKit::new_instance/new_array, whose output it recognizes.)
835 // The 'ptr' may not have an offset unless the 'offset' argument is given.
836 static AllocateNode* Ideal_allocation(Node* ptr, PhaseTransform* phase);
837
838 // Fancy version which uses AddPNode::Ideal_base_and_offset to strip
839 // an offset, which is reported back to the caller.
840 // (Note: AllocateNode::Ideal_allocation is defined in graphKit.cpp.)
841 static AllocateNode* Ideal_allocation(Node* ptr, PhaseTransform* phase,
842 intptr_t& offset);
843
844 // Dig the klass operand out of a (possible) allocation site.
845 static Node* Ideal_klass(Node* ptr, PhaseTransform* phase) {
846 AllocateNode* allo = Ideal_allocation(ptr, phase);
847 return (allo == NULL) ? NULL : allo->in(KlassNode);
848 }
849
850 // Conservatively small estimate of offset of first non-header byte.
851 int minimum_header_size() {
852 return is_AllocateArray() ? arrayOopDesc::base_offset_in_bytes(T_BYTE) :
853 instanceOopDesc::base_offset_in_bytes();
854 }
855
856 // Return the corresponding initialization barrier (or null if none).
857 // Walks out edges to find it...
858 // (Note: Both InitializeNode::allocation and AllocateNode::initialization
859 // are defined in graphKit.cpp, which sets up the bidirectional relation.)
860 InitializeNode* initialization();
861
862 // Convenience for initialization->maybe_set_complete(phase)
863 bool maybe_set_complete(PhaseGVN* phase);
864 };
865
866 //------------------------------AllocateArray---------------------------------
867 //
868 // High-level array allocation
869 //
870 class AllocateArrayNode : public AllocateNode {
871 public:
872 AllocateArrayNode(Compile* C, const TypeFunc *atype, Node *ctrl, Node *mem, Node *abio,
873 Node* size, Node* klass_node, Node* initial_test,
874 Node* count_val
875 )
876 : AllocateNode(C, atype, ctrl, mem, abio, size, klass_node,
877 initial_test)
878 {
879 init_class_id(Class_AllocateArray);
880 set_req(AllocateNode::ALength, count_val);
881 }
882 virtual int Opcode() const;
883 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
884
885 // Dig the length operand out of a array allocation site.
886 Node* Ideal_length() {
887 return in(AllocateNode::ALength);
888 }
889
890 // Dig the length operand out of a array allocation site and narrow the
891 // type with a CastII, if necesssary
892 Node* make_ideal_length(const TypeOopPtr* ary_type, PhaseTransform *phase, bool can_create = true);
893
894 // Pattern-match a possible usage of AllocateArrayNode.
895 // Return null if no allocation is recognized.
896 static AllocateArrayNode* Ideal_array_allocation(Node* ptr, PhaseTransform* phase) {
897 AllocateNode* allo = Ideal_allocation(ptr, phase);
898 return (allo == NULL || !allo->is_AllocateArray())
899 ? NULL : allo->as_AllocateArray();
900 }
901 };
902
903 //------------------------------AbstractLockNode-----------------------------------
904 class AbstractLockNode: public CallNode {
905 private:
906 enum {
907 Regular = 0, // Normal lock
908 NonEscObj, // Lock is used for non escaping object
909 Coarsened, // Lock was coarsened
910 Nested // Nested lock
911 } _kind;
912 #ifndef PRODUCT
913 NamedCounter* _counter;
914 #endif
915
916 protected:
917 // helper functions for lock elimination
918 //
919
920 bool find_matching_unlock(const Node* ctrl, LockNode* lock,
921 GrowableArray<AbstractLockNode*> &lock_ops);
922 bool find_lock_and_unlock_through_if(Node* node, LockNode* lock,
923 GrowableArray<AbstractLockNode*> &lock_ops);
924 bool find_unlocks_for_region(const RegionNode* region, LockNode* lock,
925 GrowableArray<AbstractLockNode*> &lock_ops);
926 LockNode *find_matching_lock(UnlockNode* unlock);
927
928 // Update the counter to indicate that this lock was eliminated.
929 void set_eliminated_lock_counter() PRODUCT_RETURN;
930
931 public:
932 AbstractLockNode(const TypeFunc *tf)
933 : CallNode(tf, NULL, TypeRawPtr::BOTTOM),
934 _kind(Regular)
935 {
936 #ifndef PRODUCT
937 _counter = NULL;
938 #endif
939 }
940 virtual int Opcode() const = 0;
941 Node * obj_node() const {return in(TypeFunc::Parms + 0); }
942 Node * box_node() const {return in(TypeFunc::Parms + 1); }
943 Node * fastlock_node() const {return in(TypeFunc::Parms + 2); }
944 void set_box_node(Node* box) { set_req(TypeFunc::Parms + 1, box); }
945
946 const Type *sub(const Type *t1, const Type *t2) const { return TypeInt::CC;}
947
948 virtual uint size_of() const { return sizeof(*this); }
949
950 bool is_eliminated() const { return (_kind != Regular); }
951 bool is_non_esc_obj() const { return (_kind == NonEscObj); }
952 bool is_coarsened() const { return (_kind == Coarsened); }
953 bool is_nested() const { return (_kind == Nested); }
954
955 void set_non_esc_obj() { _kind = NonEscObj; set_eliminated_lock_counter(); }
956 void set_coarsened() { _kind = Coarsened; set_eliminated_lock_counter(); }
957 void set_nested() { _kind = Nested; set_eliminated_lock_counter(); }
958
959 // locking does not modify its arguments
960 virtual bool may_modify(const TypeOopPtr *t_oop, PhaseTransform *phase){ return false;}
961
962 #ifndef PRODUCT
963 void create_lock_counter(JVMState* s);
964 NamedCounter* counter() const { return _counter; }
965 #endif
966 };
967
968 //------------------------------Lock---------------------------------------
969 // High-level lock operation
970 //
971 // This is a subclass of CallNode because it is a macro node which gets expanded
972 // into a code sequence containing a call. This node takes 3 "parameters":
973 // 0 - object to lock
974 // 1 - a BoxLockNode
975 // 2 - a FastLockNode
976 //
977 class LockNode : public AbstractLockNode {
978 public:
979
980 static const TypeFunc *lock_type() {
981 // create input type (domain)
982 const Type **fields = TypeTuple::fields(3);
983 fields[TypeFunc::Parms+0] = TypeInstPtr::NOTNULL; // Object to be Locked
984 fields[TypeFunc::Parms+1] = TypeRawPtr::BOTTOM; // Address of stack location for lock
985 fields[TypeFunc::Parms+2] = TypeInt::BOOL; // FastLock
986 const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+3,fields);
987
988 // create result type (range)
989 fields = TypeTuple::fields(0);
990
991 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+0,fields);
992
993 return TypeFunc::make(domain,range);
994 }
995
996 virtual int Opcode() const;
997 virtual uint size_of() const; // Size is bigger
998 LockNode(Compile* C, const TypeFunc *tf) : AbstractLockNode( tf ) {
999 init_class_id(Class_Lock);
1000 init_flags(Flag_is_macro);
1001 C->add_macro_node(this);
1002 }
1003 virtual bool guaranteed_safepoint() { return false; }
1004
1005 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
1006 // Expansion modifies the JVMState, so we need to clone it
1007 virtual void clone_jvms(Compile* C) {
1008 if (jvms() != NULL) {
1009 set_jvms(jvms()->clone_deep(C));
1010 jvms()->set_map_deep(this);
1011 }
1012 }
1013
1014 bool is_nested_lock_region(); // Is this Lock nested?
1015 };
1016
1017 //------------------------------Unlock---------------------------------------
1018 // High-level unlock operation
1019 class UnlockNode : public AbstractLockNode {
1020 public:
1021 virtual int Opcode() const;
1022 virtual uint size_of() const; // Size is bigger
1023 UnlockNode(Compile* C, const TypeFunc *tf) : AbstractLockNode( tf ) {
1024 init_class_id(Class_Unlock);
1025 init_flags(Flag_is_macro);
1026 C->add_macro_node(this);
1027 }
1028 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
1029 // unlock is never a safepoint
1030 virtual bool guaranteed_safepoint() { return false; }
1031 };
1032
1033 #endif // SHARE_VM_OPTO_CALLNODE_HPP

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