1 /*
2 * Copyright (c) 1997, 2021, 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_OPTO_CALLNODE_HPP
26 #define SHARE_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/replacednodes.hpp"
34 #include "opto/type.hpp"
35 #include "utilities/growableArray.hpp"
36
37 // Portions of code courtesy of Clifford Click
38
39 // Optimization - Graph Style
40
41 class NamedCounter;
42 class MultiNode;
43 class SafePointNode;
44 class CallNode;
45 class CallJavaNode;
46 class CallStaticJavaNode;
47 class CallDynamicJavaNode;
48 class CallRuntimeNode;
49 class CallLeafNode;
50 class CallLeafNoFPNode;
51 class CallLeafVectorNode;
52 class CallNativeNode;
53 class AllocateNode;
54 class AllocateArrayNode;
55 class AbstractLockNode;
56 class LockNode;
57 class UnlockNode;
58 class FastLockNode;
59
60 //------------------------------StartNode--------------------------------------
61 // The method start node
62 class StartNode : public MultiNode {
63 virtual bool cmp( const Node &n ) const;
64 virtual uint size_of() const; // Size is bigger
65 public:
66 const TypeTuple *_domain;
67 StartNode( Node *root, const TypeTuple *domain ) : MultiNode(2), _domain(domain) {
68 init_class_id(Class_Start);
69 init_req(0,this);
70 init_req(1,root);
71 }
72 virtual int Opcode() const;
73 virtual bool pinned() const { return true; };
74 virtual const Type *bottom_type() const;
75 virtual const TypePtr *adr_type() const { return TypePtr::BOTTOM; }
76 virtual const Type* Value(PhaseGVN* phase) const;
77 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
78 virtual void calling_convention( BasicType* sig_bt, VMRegPair *parm_reg, uint length ) const;
79 virtual const RegMask &in_RegMask(uint) const;
80 virtual Node *match(const ProjNode *proj, const Matcher *m, const RegMask* mask);
81 virtual uint ideal_reg() const { return 0; }
82 #ifndef PRODUCT
83 virtual void dump_spec(outputStream *st) const;
84 virtual void dump_compact_spec(outputStream *st) const;
85 #endif
86 };
87
88 //------------------------------StartOSRNode-----------------------------------
89 // The method start node for on stack replacement code
90 class StartOSRNode : public StartNode {
91 public:
92 StartOSRNode( Node *root, const TypeTuple *domain ) : StartNode(root, domain) {}
93 virtual int Opcode() const;
94 };
95
96
97 //------------------------------ParmNode---------------------------------------
98 // Incoming parameters
99 class ParmNode : public ProjNode {
100 static const char * const names[TypeFunc::Parms+1];
101 public:
102 ParmNode( StartNode *src, uint con ) : ProjNode(src,con) {
103 init_class_id(Class_Parm);
104 }
105 virtual int Opcode() const;
106 virtual bool is_CFG() const { return (_con == TypeFunc::Control); }
107 virtual uint ideal_reg() const;
108 #ifndef PRODUCT
109 virtual void dump_spec(outputStream *st) const;
110 virtual void dump_compact_spec(outputStream *st) const;
111 virtual void related(GrowableArray<Node*> *in_rel, GrowableArray<Node*> *out_rel, bool compact) 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(PhaseGVN* 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(PhaseGVN* 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 bind_map(SafePointNode* map); // set_map() and set_jvms() for the SafePointNode
294 void set_sp(uint sp) { _sp = sp; }
295 // _reexecute is initialized to "undefined" for a new bci
296 void set_bci(int bci) {if(_bci != bci)_reexecute=Reexecute_Undefined; _bci = bci; }
297 void set_should_reexecute(bool reexec) {_reexecute = reexec ? Reexecute_True : Reexecute_False;}
298
299 // Miscellaneous utility functions
300 JVMState* clone_deep(Compile* C) const; // recursively clones caller chain
301 JVMState* clone_shallow(Compile* C) const; // retains uncloned caller
302 void set_map_deep(SafePointNode *map);// reset map for all callers
303 void adapt_position(int delta); // Adapt offsets in in-array after adding an edge.
304 int interpreter_frame_size() const;
305
306 #ifndef PRODUCT
307 void print_method_with_lineno(outputStream* st, bool show_name) const;
308 void format(PhaseRegAlloc *regalloc, const Node *n, outputStream* st) const;
309 void dump_spec(outputStream *st) const;
310 void dump_on(outputStream* st) const;
311 void dump() const {
312 dump_on(tty);
313 }
314 #endif
315 };
316
317 //------------------------------SafePointNode----------------------------------
318 // A SafePointNode is a subclass of a MultiNode for convenience (and
319 // potential code sharing) only - conceptually it is independent of
320 // the Node semantics.
321 class SafePointNode : public MultiNode {
322 friend JVMState;
323 friend class GraphKit;
324 friend class VMStructs;
325
326 virtual bool cmp( const Node &n ) const;
327 virtual uint size_of() const; // Size is bigger
328
329 protected:
330 JVMState* const _jvms; // Pointer to list of JVM State objects
331 // Many calls take *all* of memory as input,
332 // but some produce a limited subset of that memory as output.
333 // The adr_type reports the call's behavior as a store, not a load.
334 const TypePtr* _adr_type; // What type of memory does this node produce?
335 ReplacedNodes _replaced_nodes; // During parsing: list of pair of nodes from calls to GraphKit::replace_in_map()
336 bool _has_ea_local_in_scope; // NoEscape or ArgEscape objects in JVM States
337
338 void set_jvms(JVMState* s) {
339 assert(s != nullptr, "assign NULL value to _jvms");
340 *(JVMState**)&_jvms = s; // override const attribute in the accessor
341 }
342 public:
343 SafePointNode(uint edges, JVMState* jvms,
344 // A plain safepoint advertises no memory effects (NULL):
345 const TypePtr* adr_type = NULL)
346 : MultiNode( edges ),
347 _jvms(jvms),
348 _adr_type(adr_type),
349 _has_ea_local_in_scope(false)
350 {
351 init_class_id(Class_SafePoint);
352 }
353
354 JVMState* jvms() const { return _jvms; }
355 virtual bool needs_deep_clone_jvms(Compile* C) { return false; }
356 void clone_jvms(Compile* C) {
357 if (jvms() != NULL) {
358 if (needs_deep_clone_jvms(C)) {
359 set_jvms(jvms()->clone_deep(C));
360 jvms()->set_map_deep(this);
361 } else {
362 jvms()->clone_shallow(C)->bind_map(this);
363 }
364 }
365 }
366
367 private:
368 void verify_input(JVMState* jvms, uint idx) const {
369 assert(verify_jvms(jvms), "jvms must match");
370 Node* n = in(idx);
371 assert((!n->bottom_type()->isa_long() && !n->bottom_type()->isa_double()) ||
372 in(idx + 1)->is_top(), "2nd half of long/double");
373 }
374
375 public:
376 // Functionality from old debug nodes which has changed
377 Node *local(JVMState* jvms, uint idx) const {
378 verify_input(jvms, jvms->locoff() + idx);
379 return in(jvms->locoff() + idx);
380 }
381 Node *stack(JVMState* jvms, uint idx) const {
382 verify_input(jvms, jvms->stkoff() + idx);
383 return in(jvms->stkoff() + idx);
384 }
385 Node *argument(JVMState* jvms, uint idx) const {
386 verify_input(jvms, jvms->argoff() + idx);
387 return in(jvms->argoff() + idx);
388 }
389 Node *monitor_box(JVMState* jvms, uint idx) const {
390 assert(verify_jvms(jvms), "jvms must match");
391 return in(jvms->monitor_box_offset(idx));
392 }
393 Node *monitor_obj(JVMState* jvms, uint idx) const {
394 assert(verify_jvms(jvms), "jvms must match");
395 return in(jvms->monitor_obj_offset(idx));
396 }
397
398 void set_local(JVMState* jvms, uint idx, Node *c);
399
400 void set_stack(JVMState* jvms, uint idx, Node *c) {
401 assert(verify_jvms(jvms), "jvms must match");
402 set_req(jvms->stkoff() + idx, c);
403 }
404 void set_argument(JVMState* jvms, uint idx, Node *c) {
405 assert(verify_jvms(jvms), "jvms must match");
406 set_req(jvms->argoff() + idx, c);
407 }
408 void ensure_stack(JVMState* jvms, uint stk_size) {
409 assert(verify_jvms(jvms), "jvms must match");
410 int grow_by = (int)stk_size - (int)jvms->stk_size();
411 if (grow_by > 0) grow_stack(jvms, grow_by);
412 }
413 void grow_stack(JVMState* jvms, uint grow_by);
414 // Handle monitor stack
415 void push_monitor( const FastLockNode *lock );
416 void pop_monitor ();
417 Node *peek_monitor_box() const;
418 Node *peek_monitor_obj() const;
419
420 // Access functions for the JVM
421 Node *control () const { return in(TypeFunc::Control ); }
422 Node *i_o () const { return in(TypeFunc::I_O ); }
423 Node *memory () const { return in(TypeFunc::Memory ); }
424 Node *returnadr() const { return in(TypeFunc::ReturnAdr); }
425 Node *frameptr () const { return in(TypeFunc::FramePtr ); }
426
427 void set_control ( Node *c ) { set_req(TypeFunc::Control,c); }
428 void set_i_o ( Node *c ) { set_req(TypeFunc::I_O ,c); }
429 void set_memory ( Node *c ) { set_req(TypeFunc::Memory ,c); }
430
431 MergeMemNode* merged_memory() const {
432 return in(TypeFunc::Memory)->as_MergeMem();
433 }
434
435 // The parser marks useless maps as dead when it's done with them:
436 bool is_killed() { return in(TypeFunc::Control) == NULL; }
437
438 // Exception states bubbling out of subgraphs such as inlined calls
439 // are recorded here. (There might be more than one, hence the "next".)
440 // This feature is used only for safepoints which serve as "maps"
441 // for JVM states during parsing, intrinsic expansion, etc.
442 SafePointNode* next_exception() const;
443 void set_next_exception(SafePointNode* n);
444 bool has_exceptions() const { return next_exception() != NULL; }
445
446 // Helper methods to operate on replaced nodes
447 ReplacedNodes replaced_nodes() const {
448 return _replaced_nodes;
449 }
450
451 void set_replaced_nodes(ReplacedNodes replaced_nodes) {
452 _replaced_nodes = replaced_nodes;
453 }
454
455 void clone_replaced_nodes() {
456 _replaced_nodes.clone();
457 }
458 void record_replaced_node(Node* initial, Node* improved) {
459 _replaced_nodes.record(initial, improved);
460 }
461 void transfer_replaced_nodes_from(SafePointNode* sfpt, uint idx = 0) {
462 _replaced_nodes.transfer_from(sfpt->_replaced_nodes, idx);
463 }
464 void delete_replaced_nodes() {
465 _replaced_nodes.reset();
466 }
467 void apply_replaced_nodes(uint idx) {
468 _replaced_nodes.apply(this, idx);
469 }
470 void merge_replaced_nodes_with(SafePointNode* sfpt) {
471 _replaced_nodes.merge_with(sfpt->_replaced_nodes);
472 }
473 bool has_replaced_nodes() const {
474 return !_replaced_nodes.is_empty();
475 }
476 void set_has_ea_local_in_scope(bool b) {
477 _has_ea_local_in_scope = b;
478 }
479 bool has_ea_local_in_scope() const {
480 return _has_ea_local_in_scope;
481 }
482
483 void disconnect_from_root(PhaseIterGVN *igvn);
484
485 // Standard Node stuff
486 virtual int Opcode() const;
487 virtual bool pinned() const { return true; }
488 virtual const Type* Value(PhaseGVN* phase) const;
489 virtual const Type* bottom_type() const { return Type::CONTROL; }
490 virtual const TypePtr* adr_type() const { return _adr_type; }
491 void set_adr_type(const TypePtr* adr_type) { _adr_type = adr_type; }
492 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
493 virtual Node* Identity(PhaseGVN* phase);
494 virtual uint ideal_reg() const { return 0; }
495 virtual const RegMask &in_RegMask(uint) const;
496 virtual const RegMask &out_RegMask() const;
497 virtual uint match_edge(uint idx) const;
498
499 #ifndef PRODUCT
500 virtual void dump_spec(outputStream *st) const;
501 virtual void related(GrowableArray<Node*> *in_rel, GrowableArray<Node*> *out_rel, bool compact) const;
502 #endif
503 };
504
505 //------------------------------SafePointScalarObjectNode----------------------
506 // A SafePointScalarObjectNode represents the state of a scalarized object
507 // at a safepoint.
508
509 class SafePointScalarObjectNode: public TypeNode {
510 uint _first_index; // First input edge relative index of a SafePoint node where
511 // states of the scalarized object fields are collected.
512 // It is relative to the last (youngest) jvms->_scloff.
513 uint _n_fields; // Number of non-static fields of the scalarized object.
514 bool _is_auto_box; // True if the scalarized object is an auto box.
515 DEBUG_ONLY(Node* _alloc;)
516
517 virtual uint hash() const ; // { return NO_HASH; }
518 virtual bool cmp( const Node &n ) const;
519
520 uint first_index() const { return _first_index; }
521
522 public:
523 SafePointScalarObjectNode(const TypeOopPtr* tp,
524 #ifdef ASSERT
525 Node* alloc,
526 #endif
527 uint first_index, uint n_fields, bool is_auto_box = false);
528 virtual int Opcode() const;
529 virtual uint ideal_reg() const;
530 virtual const RegMask &in_RegMask(uint) const;
531 virtual const RegMask &out_RegMask() const;
532 virtual uint match_edge(uint idx) const;
533
534 uint first_index(JVMState* jvms) const {
535 assert(jvms != NULL, "missed JVMS");
536 return jvms->scloff() + _first_index;
537 }
538 uint n_fields() const { return _n_fields; }
539
540 bool is_auto_box() const { return _is_auto_box; }
541 #ifdef ASSERT
542 Node* alloc() const { return _alloc; }
543 #endif
544
545 virtual uint size_of() const { return sizeof(*this); }
546
547 // Assumes that "this" is an argument to a safepoint node "s", and that
548 // "new_call" is being created to correspond to "s". But the difference
549 // between the start index of the jvmstates of "new_call" and "s" is
550 // "jvms_adj". Produce and return a SafePointScalarObjectNode that
551 // corresponds appropriately to "this" in "new_call". Assumes that
552 // "sosn_map" is a map, specific to the translation of "s" to "new_call",
553 // mapping old SafePointScalarObjectNodes to new, to avoid multiple copies.
554 SafePointScalarObjectNode* clone(Dict* sosn_map, bool& new_node) const;
555
556 #ifndef PRODUCT
557 virtual void dump_spec(outputStream *st) const;
558 #endif
559 };
560
561
562 // Simple container for the outgoing projections of a call. Useful
563 // for serious surgery on calls.
564 class CallProjections {
565 public:
566 Node* fallthrough_proj;
567 Node* fallthrough_catchproj;
568 Node* fallthrough_memproj;
569 Node* fallthrough_ioproj;
570 Node* catchall_catchproj;
571 Node* catchall_memproj;
572 Node* catchall_ioproj;
573 Node* exobj;
574 uint nb_resproj;
575 Node* resproj[1]; // at least one projection
576
577 CallProjections(uint nbres) {
578 fallthrough_proj = NULL;
579 fallthrough_catchproj = NULL;
580 fallthrough_memproj = NULL;
581 fallthrough_ioproj = NULL;
582 catchall_catchproj = NULL;
583 catchall_memproj = NULL;
584 catchall_ioproj = NULL;
585 exobj = NULL;
586 nb_resproj = nbres;
587 resproj[0] = NULL;
588 for (uint i = 1; i < nb_resproj; i++) {
589 resproj[i] = NULL;
590 }
591 }
592
593 };
594
595 class CallGenerator;
596
597 //------------------------------CallNode---------------------------------------
598 // Call nodes now subsume the function of debug nodes at callsites, so they
599 // contain the functionality of a full scope chain of debug nodes.
600 class CallNode : public SafePointNode {
601 friend class VMStructs;
602
603 protected:
604 bool may_modify_arraycopy_helper(const TypeOopPtr* dest_t, const TypeOopPtr* t_oop, PhaseTransform* phase);
605
606 public:
607 const TypeFunc* _tf; // Function type
608 address _entry_point; // Address of method being called
609 float _cnt; // Estimate of number of times called
610 CallGenerator* _generator; // corresponding CallGenerator for some late inline calls
611 const char* _name; // Printable name, if _method is NULL
612
613 CallNode(const TypeFunc* tf, address addr, const TypePtr* adr_type, JVMState* jvms = nullptr)
614 : SafePointNode(tf->domain_cc()->cnt(), jvms, adr_type),
615 _tf(tf),
616 _entry_point(addr),
617 _cnt(COUNT_UNKNOWN),
618 _generator(NULL),
619 _name(NULL)
620 {
621 init_class_id(Class_Call);
622 }
623
624 const TypeFunc* tf() const { return _tf; }
625 const address entry_point() const { return _entry_point; }
626 const float cnt() const { return _cnt; }
627 CallGenerator* generator() const { return _generator; }
628
629 void set_tf(const TypeFunc* tf) { _tf = tf; }
630 void set_entry_point(address p) { _entry_point = p; }
631 void set_cnt(float c) { _cnt = c; }
632 void set_generator(CallGenerator* cg) { _generator = cg; }
633
634 virtual const Type* bottom_type() const;
635 virtual const Type* Value(PhaseGVN* phase) const;
636 virtual Node* Ideal(PhaseGVN* phase, bool can_reshape);
637 virtual Node* Identity(PhaseGVN* phase) { return this; }
638 virtual bool cmp(const Node &n) const;
639 virtual uint size_of() const = 0;
640 virtual void calling_convention(BasicType* sig_bt, VMRegPair* parm_regs, uint argcnt) const;
641 virtual Node* match(const ProjNode* proj, const Matcher* m, const RegMask* mask);
642 virtual uint ideal_reg() const { return NotAMachineReg; }
643 // Are we guaranteed that this node is a safepoint? Not true for leaf calls and
644 // for some macro nodes whose expansion does not have a safepoint on the fast path.
645 virtual bool guaranteed_safepoint() { return true; }
646 // For macro nodes, the JVMState gets modified during expansion. If calls
647 // use MachConstantBase, it gets modified during matching. So when cloning
648 // the node the JVMState must be deep cloned. Default is to shallow clone.
649 virtual bool needs_deep_clone_jvms(Compile* C) { return C->needs_deep_clone_jvms(); }
650
651 // Returns true if the call may modify n
652 virtual bool may_modify(const TypeOopPtr* t_oop, PhaseTransform* phase);
653 // Does this node have a use of n other than in debug information?
654 bool has_non_debug_use(Node* n);
655 bool has_debug_use(Node* n);
656 // Returns the unique CheckCastPP of a call
657 // or result projection is there are several CheckCastPP
658 // or returns NULL if there is no one.
659 Node* result_cast();
660 // Does this node returns pointer?
661 bool returns_pointer() const {
662 const TypeTuple* r = tf()->range_sig();
663 return (!tf()->returns_inline_type_as_fields() &&
664 r->cnt() > TypeFunc::Parms &&
665 r->field_at(TypeFunc::Parms)->isa_ptr());
666 }
667
668 // Collect all the interesting edges from a call for use in
669 // replacing the call by something else. Used by macro expansion
670 // and the late inlining support.
671 CallProjections* extract_projections(bool separate_io_proj, bool do_asserts = true);
672
673 virtual uint match_edge(uint idx) const;
674
675 bool is_call_to_arraycopystub() const;
676
677 virtual void copy_call_debug_info(PhaseIterGVN* phase, SafePointNode* sfpt) {}
678
679 #ifndef PRODUCT
680 virtual void dump_req(outputStream* st = tty) const;
681 virtual void dump_spec(outputStream* st) const;
682 #endif
683 };
684
685
686 //------------------------------CallJavaNode-----------------------------------
687 // Make a static or dynamic subroutine call node using Java calling
688 // convention. (The "Java" calling convention is the compiler's calling
689 // convention, as opposed to the interpreter's or that of native C.)
690 class CallJavaNode : public CallNode {
691 friend class VMStructs;
692 protected:
693 virtual bool cmp( const Node &n ) const;
694 virtual uint size_of() const; // Size is bigger
695
696 bool _optimized_virtual;
697 bool _method_handle_invoke;
698 bool _override_symbolic_info; // Override symbolic call site info from bytecode
699 ciMethod* _method; // Method being direct called
700 bool _arg_escape; // ArgEscape in parameter list
701 public:
702 CallJavaNode(const TypeFunc* tf , address addr, ciMethod* method)
703 : CallNode(tf, addr, TypePtr::BOTTOM),
704 _optimized_virtual(false),
705 _method_handle_invoke(false),
706 _override_symbolic_info(false),
707 _method(method),
708 _arg_escape(false)
709 {
710 init_class_id(Class_CallJava);
711 }
712
713 virtual int Opcode() const;
714 ciMethod* method() const { return _method; }
715 void set_method(ciMethod *m) { _method = m; }
716 void set_optimized_virtual(bool f) { _optimized_virtual = f; }
717 bool is_optimized_virtual() const { return _optimized_virtual; }
718 void set_method_handle_invoke(bool f) { _method_handle_invoke = f; }
719 bool is_method_handle_invoke() const { return _method_handle_invoke; }
720 void set_override_symbolic_info(bool f) { _override_symbolic_info = f; }
721 bool override_symbolic_info() const { return _override_symbolic_info; }
722 void set_arg_escape(bool f) { _arg_escape = f; }
723 bool arg_escape() const { return _arg_escape; }
724 void copy_call_debug_info(PhaseIterGVN* phase, SafePointNode *sfpt);
725
726 DEBUG_ONLY( bool validate_symbolic_info() const; )
727
728 #ifndef PRODUCT
729 virtual void dump_spec(outputStream *st) const;
730 virtual void dump_compact_spec(outputStream *st) const;
731 #endif
732 };
733
734 //------------------------------CallStaticJavaNode-----------------------------
735 // Make a direct subroutine call using Java calling convention (for static
736 // calls and optimized virtual calls, plus calls to wrappers for run-time
737 // routines); generates static stub.
738 class CallStaticJavaNode : public CallJavaNode {
739 virtual bool cmp( const Node &n ) const;
740 virtual uint size_of() const; // Size is bigger
741
742 bool remove_useless_allocation(PhaseGVN *phase, Node* ctl, Node* mem, Node* unc_arg);
743
744 public:
745 CallStaticJavaNode(Compile* C, const TypeFunc* tf, address addr, ciMethod* method)
746 : CallJavaNode(tf, addr, method) {
747 init_class_id(Class_CallStaticJava);
748 if (C->eliminate_boxing() && (method != NULL) && method->is_boxing_method()) {
749 init_flags(Flag_is_macro);
750 C->add_macro_node(this);
751 }
752 const TypeTuple *r = tf->range_sig();
753 if (InlineTypeReturnedAsFields &&
754 method != NULL &&
755 method->is_method_handle_intrinsic() &&
756 r->cnt() > TypeFunc::Parms &&
757 r->field_at(TypeFunc::Parms)->isa_oopptr() &&
758 r->field_at(TypeFunc::Parms)->is_oopptr()->can_be_inline_type()) {
759 // Make sure this call is processed by PhaseMacroExpand::expand_mh_intrinsic_return
760 init_flags(Flag_is_macro);
761 C->add_macro_node(this);
762 }
763 }
764 CallStaticJavaNode(const TypeFunc* tf, address addr, const char* name, const TypePtr* adr_type)
765 : CallJavaNode(tf, addr, NULL) {
766 init_class_id(Class_CallStaticJava);
767 // This node calls a runtime stub, which often has narrow memory effects.
768 _adr_type = adr_type;
769 _name = name;
770 }
771
772 // If this is an uncommon trap, return the request code, else zero.
773 int uncommon_trap_request() const;
774 static int extract_uncommon_trap_request(const Node* call);
775
776 bool is_boxing_method() const {
777 return is_macro() && (method() != NULL) && method()->is_boxing_method();
778 }
779 // Late inlining modifies the JVMState, so we need to deep clone it
780 // when the call node is cloned (because it is macro node).
781 virtual bool needs_deep_clone_jvms(Compile* C) {
782 return is_boxing_method() || CallNode::needs_deep_clone_jvms(C);
783 }
784
785 virtual int Opcode() const;
786 virtual Node* Ideal(PhaseGVN* phase, bool can_reshape);
787
788 #ifndef PRODUCT
789 virtual void dump_spec(outputStream *st) const;
790 virtual void dump_compact_spec(outputStream *st) const;
791 #endif
792 };
793
794 //------------------------------CallDynamicJavaNode----------------------------
795 // Make a dispatched call using Java calling convention.
796 class CallDynamicJavaNode : public CallJavaNode {
797 virtual bool cmp( const Node &n ) const;
798 virtual uint size_of() const; // Size is bigger
799 public:
800 CallDynamicJavaNode(const TypeFunc* tf , address addr, ciMethod* method, int vtable_index)
801 : CallJavaNode(tf,addr,method), _vtable_index(vtable_index) {
802 init_class_id(Class_CallDynamicJava);
803 }
804
805 // Late inlining modifies the JVMState, so we need to deep clone it
806 // when the call node is cloned.
807 virtual bool needs_deep_clone_jvms(Compile* C) {
808 return IncrementalInlineVirtual || CallNode::needs_deep_clone_jvms(C);
809 }
810
811 int _vtable_index;
812 virtual int Opcode() const;
813 virtual Node* Ideal(PhaseGVN* phase, bool can_reshape);
814 #ifndef PRODUCT
815 virtual void dump_spec(outputStream *st) const;
816 #endif
817 };
818
819 //------------------------------CallRuntimeNode--------------------------------
820 // Make a direct subroutine call node into compiled C++ code.
821 class CallRuntimeNode : public CallNode {
822 protected:
823 virtual bool cmp( const Node &n ) const;
824 virtual uint size_of() const; // Size is bigger
825 public:
826 CallRuntimeNode(const TypeFunc* tf, address addr, const char* name,
827 const TypePtr* adr_type, JVMState* jvms = nullptr)
828 : CallNode(tf, addr, adr_type, jvms)
829 {
830 init_class_id(Class_CallRuntime);
831 _name = name;
832 }
833
834 virtual int Opcode() const;
835 virtual void calling_convention( BasicType* sig_bt, VMRegPair *parm_regs, uint argcnt ) const;
836
837 #ifndef PRODUCT
838 virtual void dump_spec(outputStream *st) const;
839 #endif
840 };
841
842 //------------------------------CallLeafNode-----------------------------------
843 // Make a direct subroutine call node into compiled C++ code, without
844 // safepoints
845 class CallLeafNode : public CallRuntimeNode {
846 public:
847 CallLeafNode(const TypeFunc* tf, address addr, const char* name,
848 const TypePtr* adr_type)
849 : CallRuntimeNode(tf, addr, name, adr_type)
850 {
851 init_class_id(Class_CallLeaf);
852 }
853 virtual int Opcode() const;
854 virtual bool guaranteed_safepoint() { return false; }
855 #ifndef PRODUCT
856 virtual void dump_spec(outputStream *st) const;
857 #endif
858 };
859
860 //------------------------------CallNativeNode-----------------------------------
861 // Make a direct call into a foreign function with an arbitrary ABI
862 // safepoints
863 class CallNativeNode : public CallNode {
864 friend class MachCallNativeNode;
865 virtual bool cmp( const Node &n ) const;
866 virtual uint size_of() const;
867 static void print_regs(const GrowableArray<VMReg>& regs, outputStream* st);
868 public:
869 GrowableArray<VMReg> _arg_regs;
870 GrowableArray<VMReg> _ret_regs;
871 const int _shadow_space_bytes;
872 const bool _need_transition;
873
874 CallNativeNode(const TypeFunc* tf, address addr, const char* name,
875 const TypePtr* adr_type,
876 const GrowableArray<VMReg>& arg_regs,
877 const GrowableArray<VMReg>& ret_regs,
878 int shadow_space_bytes,
879 bool need_transition)
880 : CallNode(tf, addr, adr_type), _arg_regs(arg_regs),
881 _ret_regs(ret_regs), _shadow_space_bytes(shadow_space_bytes),
882 _need_transition(need_transition)
883 {
884 init_class_id(Class_CallNative);
885 _name = name;
886 }
887 virtual int Opcode() const;
888 virtual bool guaranteed_safepoint() { return _need_transition; }
889 virtual Node* match(const ProjNode *proj, const Matcher *m, const RegMask* mask);
890 virtual void calling_convention( BasicType* sig_bt, VMRegPair *parm_regs, uint argcnt ) const;
891 #ifndef PRODUCT
892 virtual void dump_spec(outputStream *st) const;
893 #endif
894 };
895
896 //------------------------------CallLeafNoFPNode-------------------------------
897 // CallLeafNode, not using floating point or using it in the same manner as
898 // the generated code
899 class CallLeafNoFPNode : public CallLeafNode {
900 public:
901 CallLeafNoFPNode(const TypeFunc* tf, address addr, const char* name,
902 const TypePtr* adr_type)
903 : CallLeafNode(tf, addr, name, adr_type)
904 {
905 init_class_id(Class_CallLeafNoFP);
906 }
907 virtual int Opcode() const;
908 virtual uint match_edge(uint idx) const;
909 };
910
911 //------------------------------CallLeafVectorNode-------------------------------
912 // CallLeafNode but calling with vector calling convention instead.
913 class CallLeafVectorNode : public CallLeafNode {
914 private:
915 uint _num_bits;
916 protected:
917 virtual bool cmp( const Node &n ) const;
918 virtual uint size_of() const; // Size is bigger
919 public:
920 CallLeafVectorNode(const TypeFunc* tf, address addr, const char* name,
921 const TypePtr* adr_type, uint num_bits)
922 : CallLeafNode(tf, addr, name, adr_type), _num_bits(num_bits)
923 {
924 }
925 virtual int Opcode() const;
926 virtual void calling_convention( BasicType* sig_bt, VMRegPair *parm_regs, uint argcnt ) const;
927 };
928
929
930 //------------------------------Allocate---------------------------------------
931 // High-level memory allocation
932 //
933 // AllocateNode and AllocateArrayNode are subclasses of CallNode because they will
934 // get expanded into a code sequence containing a call. Unlike other CallNodes,
935 // they have 2 memory projections and 2 i_o projections (which are distinguished by
936 // the _is_io_use flag in the projection.) This is needed when expanding the node in
937 // order to differentiate the uses of the projection on the normal control path from
938 // those on the exception return path.
939 //
940 class AllocateNode : public CallNode {
941 public:
942 enum {
943 // Output:
944 RawAddress = TypeFunc::Parms, // the newly-allocated raw address
945 // Inputs:
946 AllocSize = TypeFunc::Parms, // size (in bytes) of the new object
947 KlassNode, // type (maybe dynamic) of the obj.
948 InitialTest, // slow-path test (may be constant)
949 ALength, // array length (or TOP if none)
950 InlineTypeNode, // InlineTypeNode if this is an inline type allocation
951 DefaultValue, // default value in case of non-flattened inline type array
952 RawDefaultValue, // same as above but as raw machine word
953 ParmLimit
954 };
955
956 static const TypeFunc* alloc_type(const Type* t) {
957 const Type** fields = TypeTuple::fields(ParmLimit - TypeFunc::Parms);
958 fields[AllocSize] = TypeInt::POS;
959 fields[KlassNode] = TypeInstPtr::NOTNULL;
960 fields[InitialTest] = TypeInt::BOOL;
961 fields[ALength] = t; // length (can be a bad length)
962 fields[InlineTypeNode] = Type::BOTTOM;
963 fields[DefaultValue] = TypeInstPtr::NOTNULL;
964 fields[RawDefaultValue] = TypeX_X;
965
966 const TypeTuple *domain = TypeTuple::make(ParmLimit, fields);
967
968 // create result type (range)
969 fields = TypeTuple::fields(1);
970 fields[TypeFunc::Parms+0] = TypeRawPtr::NOTNULL; // Returned oop
971
972 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+1, fields);
973
974 return TypeFunc::make(domain, range);
975 }
976
977 // Result of Escape Analysis
978 bool _is_scalar_replaceable;
979 bool _is_non_escaping;
980 // True when MemBar for new is redundant with MemBar at initialzer exit
981 bool _is_allocation_MemBar_redundant;
982 bool _larval;
983
984 virtual uint size_of() const; // Size is bigger
985 AllocateNode(Compile* C, const TypeFunc *atype, Node *ctrl, Node *mem, Node *abio,
986 Node *size, Node *klass_node, Node *initial_test,
987 InlineTypeBaseNode* inline_type_node = NULL);
988 // Expansion modifies the JVMState, so we need to deep clone it
989 virtual bool needs_deep_clone_jvms(Compile* C) { return true; }
990 virtual int Opcode() const;
991 virtual uint ideal_reg() const { return Op_RegP; }
992 virtual bool guaranteed_safepoint() { return false; }
993
994 // allocations do not modify their arguments
995 virtual bool may_modify(const TypeOopPtr *t_oop, PhaseTransform *phase) { return false;}
996
997 // Pattern-match a possible usage of AllocateNode.
998 // Return null if no allocation is recognized.
999 // The operand is the pointer produced by the (possible) allocation.
1000 // It must be a projection of the Allocate or its subsequent CastPP.
1001 // (Note: This function is defined in file graphKit.cpp, near
1002 // GraphKit::new_instance/new_array, whose output it recognizes.)
1003 // The 'ptr' may not have an offset unless the 'offset' argument is given.
1004 static AllocateNode* Ideal_allocation(Node* ptr, PhaseTransform* phase);
1005
1006 // Fancy version which uses AddPNode::Ideal_base_and_offset to strip
1007 // an offset, which is reported back to the caller.
1008 // (Note: AllocateNode::Ideal_allocation is defined in graphKit.cpp.)
1009 static AllocateNode* Ideal_allocation(Node* ptr, PhaseTransform* phase,
1010 intptr_t& offset);
1011
1012 // Dig the klass operand out of a (possible) allocation site.
1013 static Node* Ideal_klass(Node* ptr, PhaseTransform* phase) {
1014 AllocateNode* allo = Ideal_allocation(ptr, phase);
1015 return (allo == NULL) ? NULL : allo->in(KlassNode);
1016 }
1017
1018 // Conservatively small estimate of offset of first non-header byte.
1019 int minimum_header_size() {
1020 return is_AllocateArray() ? arrayOopDesc::base_offset_in_bytes(T_BYTE) :
1021 instanceOopDesc::base_offset_in_bytes();
1022 }
1023
1024 // Return the corresponding initialization barrier (or null if none).
1025 // Walks out edges to find it...
1026 // (Note: Both InitializeNode::allocation and AllocateNode::initialization
1027 // are defined in graphKit.cpp, which sets up the bidirectional relation.)
1028 InitializeNode* initialization();
1029
1030 // Convenience for initialization->maybe_set_complete(phase)
1031 bool maybe_set_complete(PhaseGVN* phase);
1032
1033 // Return true if allocation doesn't escape thread, its escape state
1034 // needs be noEscape or ArgEscape. InitializeNode._does_not_escape
1035 // is true when its allocation's escape state is noEscape or
1036 // ArgEscape. In case allocation's InitializeNode is NULL, check
1037 // AlllocateNode._is_non_escaping flag.
1038 // AlllocateNode._is_non_escaping is true when its escape state is
1039 // noEscape.
1040 bool does_not_escape_thread() {
1041 InitializeNode* init = NULL;
1042 return _is_non_escaping || (((init = initialization()) != NULL) && init->does_not_escape());
1043 }
1044
1045 // If object doesn't escape in <.init> method and there is memory barrier
1046 // inserted at exit of its <.init>, memory barrier for new is not necessary.
1047 // Inovke this method when MemBar at exit of initializer and post-dominate
1048 // allocation node.
1049 void compute_MemBar_redundancy(ciMethod* initializer);
1050 bool is_allocation_MemBar_redundant() { return _is_allocation_MemBar_redundant; }
1051
1052 Node* make_ideal_mark(PhaseGVN* phase, Node* control, Node* mem);
1053 };
1054
1055 //------------------------------AllocateArray---------------------------------
1056 //
1057 // High-level array allocation
1058 //
1059 class AllocateArrayNode : public AllocateNode {
1060 public:
1061 AllocateArrayNode(Compile* C, const TypeFunc *atype, Node *ctrl, Node *mem, Node *abio,
1062 Node* size, Node* klass_node, Node* initial_test,
1063 Node* count_val, Node* default_value, Node* raw_default_value)
1064 : AllocateNode(C, atype, ctrl, mem, abio, size, klass_node, initial_test)
1065 {
1066 init_class_id(Class_AllocateArray);
1067 set_req(AllocateNode::ALength, count_val);
1068 init_req(AllocateNode::DefaultValue, default_value);
1069 init_req(AllocateNode::RawDefaultValue, raw_default_value);
1070 }
1071 virtual int Opcode() const;
1072 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
1073
1074 // Dig the length operand out of a array allocation site.
1075 Node* Ideal_length() {
1076 return in(AllocateNode::ALength);
1077 }
1078
1079 // Dig the length operand out of a array allocation site and narrow the
1080 // type with a CastII, if necesssary
1081 Node* make_ideal_length(const TypeOopPtr* ary_type, PhaseTransform *phase, bool can_create = true);
1082
1083 // Pattern-match a possible usage of AllocateArrayNode.
1084 // Return null if no allocation is recognized.
1085 static AllocateArrayNode* Ideal_array_allocation(Node* ptr, PhaseTransform* phase) {
1086 AllocateNode* allo = Ideal_allocation(ptr, phase);
1087 return (allo == NULL || !allo->is_AllocateArray())
1088 ? NULL : allo->as_AllocateArray();
1089 }
1090 };
1091
1092 //------------------------------AbstractLockNode-----------------------------------
1093 class AbstractLockNode: public CallNode {
1094 private:
1095 enum {
1096 Regular = 0, // Normal lock
1097 NonEscObj, // Lock is used for non escaping object
1098 Coarsened, // Lock was coarsened
1099 Nested // Nested lock
1100 } _kind;
1101
1102 static const char* _kind_names[Nested+1];
1103
1104 #ifndef PRODUCT
1105 NamedCounter* _counter;
1106 #endif
1107
1108 protected:
1109 // helper functions for lock elimination
1110 //
1111
1112 bool find_matching_unlock(const Node* ctrl, LockNode* lock,
1113 GrowableArray<AbstractLockNode*> &lock_ops);
1114 bool find_lock_and_unlock_through_if(Node* node, LockNode* lock,
1115 GrowableArray<AbstractLockNode*> &lock_ops);
1116 bool find_unlocks_for_region(const RegionNode* region, LockNode* lock,
1117 GrowableArray<AbstractLockNode*> &lock_ops);
1118 LockNode *find_matching_lock(UnlockNode* unlock);
1119
1120 // Update the counter to indicate that this lock was eliminated.
1121 void set_eliminated_lock_counter() PRODUCT_RETURN;
1122
1123 public:
1124 AbstractLockNode(const TypeFunc *tf)
1125 : CallNode(tf, NULL, TypeRawPtr::BOTTOM),
1126 _kind(Regular)
1127 {
1128 #ifndef PRODUCT
1129 _counter = NULL;
1130 #endif
1131 }
1132 virtual int Opcode() const = 0;
1133 Node * obj_node() const {return in(TypeFunc::Parms + 0); }
1134 Node * box_node() const {return in(TypeFunc::Parms + 1); }
1135 Node * fastlock_node() const {return in(TypeFunc::Parms + 2); }
1136 void set_box_node(Node* box) { set_req(TypeFunc::Parms + 1, box); }
1137
1138 const Type *sub(const Type *t1, const Type *t2) const { return TypeInt::CC;}
1139
1140 virtual uint size_of() const { return sizeof(*this); }
1141
1142 bool is_eliminated() const { return (_kind != Regular); }
1143 bool is_non_esc_obj() const { return (_kind == NonEscObj); }
1144 bool is_coarsened() const { return (_kind == Coarsened); }
1145 bool is_nested() const { return (_kind == Nested); }
1146
1147 const char * kind_as_string() const;
1148 void log_lock_optimization(Compile* c, const char * tag, Node* bad_lock = NULL) const;
1149
1150 void set_non_esc_obj() { _kind = NonEscObj; set_eliminated_lock_counter(); }
1151 void set_coarsened() { _kind = Coarsened; set_eliminated_lock_counter(); }
1152 void set_nested() { _kind = Nested; set_eliminated_lock_counter(); }
1153
1154 // locking does not modify its arguments
1155 virtual bool may_modify(const TypeOopPtr *t_oop, PhaseTransform *phase){ return false;}
1156
1157 #ifndef PRODUCT
1158 void create_lock_counter(JVMState* s);
1159 NamedCounter* counter() const { return _counter; }
1160 virtual void dump_spec(outputStream* st) const;
1161 virtual void dump_compact_spec(outputStream* st) const;
1162 virtual void related(GrowableArray<Node*> *in_rel, GrowableArray<Node*> *out_rel, bool compact) const;
1163 #endif
1164 };
1165
1166 //------------------------------Lock---------------------------------------
1167 // High-level lock operation
1168 //
1169 // This is a subclass of CallNode because it is a macro node which gets expanded
1170 // into a code sequence containing a call. This node takes 3 "parameters":
1171 // 0 - object to lock
1172 // 1 - a BoxLockNode
1173 // 2 - a FastLockNode
1174 //
1175 class LockNode : public AbstractLockNode {
1176 public:
1177
1178 static const TypeFunc *lock_type() {
1179 // create input type (domain)
1180 const Type **fields = TypeTuple::fields(3);
1181 fields[TypeFunc::Parms+0] = TypeInstPtr::NOTNULL; // Object to be Locked
1182 fields[TypeFunc::Parms+1] = TypeRawPtr::BOTTOM; // Address of stack location for lock
1183 fields[TypeFunc::Parms+2] = TypeInt::BOOL; // FastLock
1184 const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+3,fields);
1185
1186 // create result type (range)
1187 fields = TypeTuple::fields(0);
1188
1189 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+0,fields);
1190
1191 return TypeFunc::make(domain, range);
1192 }
1193
1194 virtual int Opcode() const;
1195 virtual uint size_of() const; // Size is bigger
1196 LockNode(Compile* C, const TypeFunc *tf) : AbstractLockNode( tf ) {
1197 init_class_id(Class_Lock);
1198 init_flags(Flag_is_macro);
1199 C->add_macro_node(this);
1200 }
1201 virtual bool guaranteed_safepoint() { return false; }
1202
1203 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
1204 // Expansion modifies the JVMState, so we need to deep clone it
1205 virtual bool needs_deep_clone_jvms(Compile* C) { return true; }
1206
1207 bool is_nested_lock_region(); // Is this Lock nested?
1208 bool is_nested_lock_region(Compile * c); // Why isn't this Lock nested?
1209 };
1210
1211 //------------------------------Unlock---------------------------------------
1212 // High-level unlock operation
1213 class UnlockNode : public AbstractLockNode {
1214 private:
1215 #ifdef ASSERT
1216 JVMState* const _dbg_jvms; // Pointer to list of JVM State objects
1217 #endif
1218 public:
1219 virtual int Opcode() const;
1220 virtual uint size_of() const; // Size is bigger
1221 UnlockNode(Compile* C, const TypeFunc *tf) : AbstractLockNode( tf )
1222 #ifdef ASSERT
1223 , _dbg_jvms(NULL)
1224 #endif
1225 {
1226 init_class_id(Class_Unlock);
1227 init_flags(Flag_is_macro);
1228 C->add_macro_node(this);
1229 }
1230 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
1231 // unlock is never a safepoint
1232 virtual bool guaranteed_safepoint() { return false; }
1233 #ifdef ASSERT
1234 void set_dbg_jvms(JVMState* s) {
1235 *(JVMState**)&_dbg_jvms = s; // override const attribute in the accessor
1236 }
1237 JVMState* dbg_jvms() const { return _dbg_jvms; }
1238 #else
1239 JVMState* dbg_jvms() const { return NULL; }
1240 #endif
1241 };
1242 #endif // SHARE_OPTO_CALLNODE_HPP