1 /*
2 * Copyright (c) 1997, 2023, 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.
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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.
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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 AllocateNode;
53 class AllocateArrayNode;
54 class AbstractLockNode;
55 class LockNode;
56 class UnlockNode;
57 class FastLockNode;
58
59 //------------------------------StartNode--------------------------------------
60 // The method start node
61 class StartNode : public MultiNode {
62 virtual bool cmp( const Node &n ) const;
63 virtual uint size_of() const; // Size is bigger
64 public:
65 const TypeTuple *_domain;
66 StartNode( Node *root, const TypeTuple *domain ) : MultiNode(2), _domain(domain) {
67 init_class_id(Class_Start);
68 init_req(0,this);
69 init_req(1,root);
70 }
71 virtual int Opcode() const;
72 virtual bool pinned() const { return true; };
73 virtual const Type *bottom_type() const;
74 virtual const TypePtr *adr_type() const { return TypePtr::BOTTOM; }
75 virtual const Type* Value(PhaseGVN* phase) const;
76 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
77 virtual void calling_convention( BasicType* sig_bt, VMRegPair *parm_reg, uint length ) const;
78 virtual const RegMask &in_RegMask(uint) const;
79 virtual Node *match( const ProjNode *proj, const Matcher *m );
80 virtual uint ideal_reg() const { return 0; }
81 #ifndef PRODUCT
82 virtual void dump_spec(outputStream *st) const;
83 virtual void dump_compact_spec(outputStream *st) const;
84 #endif
85 };
86
87 //------------------------------StartOSRNode-----------------------------------
88 // The method start node for on stack replacement code
89 class StartOSRNode : public StartNode {
90 public:
91 StartOSRNode( Node *root, const TypeTuple *domain ) : StartNode(root, domain) {}
92 virtual int Opcode() const;
93 static const TypeTuple *osr_domain();
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 #endif
112 };
113
114
115 //------------------------------ReturnNode-------------------------------------
116 // Return from subroutine node
117 class ReturnNode : public Node {
118 public:
119 ReturnNode( uint edges, Node *cntrl, Node *i_o, Node *memory, Node *retadr, Node *frameptr );
120 virtual int Opcode() const;
121 virtual bool is_CFG() const { return true; }
122 virtual uint hash() const { return NO_HASH; } // CFG nodes do not hash
123 virtual bool depends_only_on_test() const { return false; }
124 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
125 virtual const Type* Value(PhaseGVN* phase) const;
126 virtual uint ideal_reg() const { return NotAMachineReg; }
127 virtual uint match_edge(uint idx) const;
128 #ifndef PRODUCT
129 virtual void dump_req(outputStream *st = tty, DumpConfig* dc = nullptr) const;
130 #endif
131 };
132
133
134 //------------------------------RethrowNode------------------------------------
135 // Rethrow of exception at call site. Ends a procedure before rethrowing;
136 // ends the current basic block like a ReturnNode. Restores registers and
137 // unwinds stack. Rethrow happens in the caller's method.
138 class RethrowNode : public Node {
139 public:
140 RethrowNode( Node *cntrl, Node *i_o, Node *memory, Node *frameptr, Node *ret_adr, Node *exception );
141 virtual int Opcode() const;
142 virtual bool is_CFG() const { return true; }
143 virtual uint hash() const { return NO_HASH; } // CFG nodes do not hash
144 virtual bool depends_only_on_test() const { return false; }
145 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
146 virtual const Type* Value(PhaseGVN* phase) const;
147 virtual uint match_edge(uint idx) const;
148 virtual uint ideal_reg() const { return NotAMachineReg; }
149 #ifndef PRODUCT
150 virtual void dump_req(outputStream *st = tty, DumpConfig* dc = nullptr) const;
151 #endif
152 };
153
154
155 //------------------------------TailCallNode-----------------------------------
156 // Pop stack frame and jump indirect
157 class TailCallNode : public ReturnNode {
158 public:
159 TailCallNode( Node *cntrl, Node *i_o, Node *memory, Node *frameptr, Node *retadr, Node *target, Node *moop )
160 : ReturnNode( TypeFunc::Parms+2, cntrl, i_o, memory, frameptr, retadr ) {
161 init_req(TypeFunc::Parms, target);
162 init_req(TypeFunc::Parms+1, moop);
163 }
164
165 virtual int Opcode() const;
166 virtual uint match_edge(uint idx) const;
167 };
168
169 //------------------------------TailJumpNode-----------------------------------
170 // Pop stack frame and jump indirect
171 class TailJumpNode : public ReturnNode {
172 public:
173 TailJumpNode( Node *cntrl, Node *i_o, Node *memory, Node *frameptr, Node *target, Node *ex_oop)
174 : ReturnNode(TypeFunc::Parms+2, cntrl, i_o, memory, frameptr, Compile::current()->top()) {
175 init_req(TypeFunc::Parms, target);
176 init_req(TypeFunc::Parms+1, ex_oop);
177 }
178
179 virtual int Opcode() const;
180 virtual uint match_edge(uint idx) const;
181 };
182
183 //-------------------------------JVMState-------------------------------------
184 // A linked list of JVMState nodes captures the whole interpreter state,
185 // plus GC roots, for all active calls at some call site in this compilation
186 // unit. (If there is no inlining, then the list has exactly one link.)
187 // This provides a way to map the optimized program back into the interpreter,
188 // or to let the GC mark the stack.
189 class JVMState : public ResourceObj {
190 friend class VMStructs;
191 public:
192 typedef enum {
193 Reexecute_Undefined = -1, // not defined -- will be translated into false later
194 Reexecute_False = 0, // false -- do not reexecute
195 Reexecute_True = 1 // true -- reexecute the bytecode
196 } ReexecuteState; //Reexecute State
197
198 private:
199 JVMState* _caller; // List pointer for forming scope chains
200 uint _depth; // One more than caller depth, or one.
201 uint _locoff; // Offset to locals in input edge mapping
202 uint _stkoff; // Offset to stack in input edge mapping
203 uint _monoff; // Offset to monitors in input edge mapping
204 uint _scloff; // Offset to fields of scalar objs in input edge mapping
205 uint _endoff; // Offset to end of input edge mapping
206 uint _sp; // Java Expression Stack Pointer for this state
207 int _bci; // Byte Code Index of this JVM point
208 ReexecuteState _reexecute; // Whether this bytecode need to be re-executed
209 ciMethod* _method; // Method Pointer
210 SafePointNode* _map; // Map node associated with this scope
211 public:
212 friend class Compile;
213 friend class PreserveReexecuteState;
214
215 // Because JVMState objects live over the entire lifetime of the
216 // Compile object, they are allocated into the comp_arena, which
217 // does not get resource marked or reset during the compile process
218 void *operator new( size_t x, Compile* C ) throw() { return C->comp_arena()->Amalloc(x); }
219 void operator delete( void * ) { } // fast deallocation
220
221 // Create a new JVMState, ready for abstract interpretation.
222 JVMState(ciMethod* method, JVMState* caller);
223 JVMState(int stack_size); // root state; has a null method
224
225 // Access functions for the JVM
226 // ... --|--- loc ---|--- stk ---|--- arg ---|--- mon ---|--- scl ---|
227 // \ locoff \ stkoff \ argoff \ monoff \ scloff \ endoff
228 uint locoff() const { return _locoff; }
229 uint stkoff() const { return _stkoff; }
230 uint argoff() const { return _stkoff + _sp; }
231 uint monoff() const { return _monoff; }
232 uint scloff() const { return _scloff; }
233 uint endoff() const { return _endoff; }
234 uint oopoff() const { return debug_end(); }
235
236 int loc_size() const { return stkoff() - locoff(); }
237 int stk_size() const { return monoff() - stkoff(); }
238 int mon_size() const { return scloff() - monoff(); }
239 int scl_size() const { return endoff() - scloff(); }
240
241 bool is_loc(uint i) const { return locoff() <= i && i < stkoff(); }
242 bool is_stk(uint i) const { return stkoff() <= i && i < monoff(); }
243 bool is_mon(uint i) const { return monoff() <= i && i < scloff(); }
244 bool is_scl(uint i) const { return scloff() <= i && i < endoff(); }
245
246 uint sp() const { return _sp; }
247 int bci() const { return _bci; }
248 bool should_reexecute() const { return _reexecute==Reexecute_True; }
249 bool is_reexecute_undefined() const { return _reexecute==Reexecute_Undefined; }
250 bool has_method() const { return _method != nullptr; }
251 ciMethod* method() const { assert(has_method(), ""); return _method; }
252 JVMState* caller() const { return _caller; }
253 SafePointNode* map() const { return _map; }
254 uint depth() const { return _depth; }
255 uint debug_start() const; // returns locoff of root caller
256 uint debug_end() const; // returns endoff of self
257 uint debug_size() const {
258 return loc_size() + sp() + mon_size() + scl_size();
259 }
260 uint debug_depth() const; // returns sum of debug_size values at all depths
261
262 // Returns the JVM state at the desired depth (1 == root).
263 JVMState* of_depth(int d) const;
264
265 // Tells if two JVM states have the same call chain (depth, methods, & bcis).
266 bool same_calls_as(const JVMState* that) const;
267
268 // Monitors (monitors are stored as (boxNode, objNode) pairs
269 enum { logMonitorEdges = 1 };
270 int nof_monitors() const { return mon_size() >> logMonitorEdges; }
271 int monitor_depth() const { return nof_monitors() + (caller() ? caller()->monitor_depth() : 0); }
272 int monitor_box_offset(int idx) const { return monoff() + (idx << logMonitorEdges) + 0; }
273 int monitor_obj_offset(int idx) const { return monoff() + (idx << logMonitorEdges) + 1; }
274 bool is_monitor_box(uint off) const {
275 assert(is_mon(off), "should be called only for monitor edge");
276 return (0 == bitfield(off - monoff(), 0, logMonitorEdges));
277 }
278 bool is_monitor_use(uint off) const { return (is_mon(off)
279 && is_monitor_box(off))
280 || (caller() && caller()->is_monitor_use(off)); }
281
282 // Initialization functions for the JVM
283 void set_locoff(uint off) { _locoff = off; }
284 void set_stkoff(uint off) { _stkoff = off; }
285 void set_monoff(uint off) { _monoff = off; }
286 void set_scloff(uint off) { _scloff = off; }
287 void set_endoff(uint off) { _endoff = off; }
288 void set_offsets(uint off) {
289 _locoff = _stkoff = _monoff = _scloff = _endoff = off;
290 }
291 void set_map(SafePointNode* map) { _map = map; }
292 void bind_map(SafePointNode* map); // set_map() and set_jvms() for the SafePointNode
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 print_method_with_lineno(outputStream* st, bool show_name) const;
307 void format(PhaseRegAlloc *regalloc, const Node *n, outputStream* st) const;
308 void dump_spec(outputStream *st) const;
309 void dump_on(outputStream* st) const;
310 void dump() const {
311 dump_on(tty);
312 }
313 #endif
314 };
315
316 //------------------------------SafePointNode----------------------------------
317 // A SafePointNode is a subclass of a MultiNode for convenience (and
318 // potential code sharing) only - conceptually it is independent of
319 // the Node semantics.
320 class SafePointNode : public MultiNode {
321 friend JVMState;
322 friend class GraphKit;
323 friend class VMStructs;
324
325 virtual bool cmp( const Node &n ) const;
326 virtual uint size_of() const; // Size is bigger
327
328 protected:
329 JVMState* const _jvms; // Pointer to list of JVM State objects
330 // Many calls take *all* of memory as input,
331 // but some produce a limited subset of that memory as output.
332 // The adr_type reports the call's behavior as a store, not a load.
333 const TypePtr* _adr_type; // What type of memory does this node produce?
334 ReplacedNodes _replaced_nodes; // During parsing: list of pair of nodes from calls to GraphKit::replace_in_map()
335 bool _has_ea_local_in_scope; // NoEscape or ArgEscape objects in JVM States
336
337 void set_jvms(JVMState* s) {
338 assert(s != nullptr, "assign null value to _jvms");
339 *(JVMState**)&_jvms = s; // override const attribute in the accessor
340 }
341 public:
342 SafePointNode(uint edges, JVMState* jvms,
343 // A plain safepoint advertises no memory effects (null):
344 const TypePtr* adr_type = nullptr)
345 : MultiNode( edges ),
346 _jvms(jvms),
347 _adr_type(adr_type),
348 _has_ea_local_in_scope(false)
349 {
350 init_class_id(Class_SafePoint);
351 }
352
353 JVMState* jvms() const { return _jvms; }
354 virtual bool needs_deep_clone_jvms(Compile* C) { return false; }
355 void clone_jvms(Compile* C) {
356 if (jvms() != nullptr) {
357 if (needs_deep_clone_jvms(C)) {
358 set_jvms(jvms()->clone_deep(C));
359 jvms()->set_map_deep(this);
360 } else {
361 jvms()->clone_shallow(C)->bind_map(this);
362 }
363 }
364 }
365
366 private:
367 void verify_input(JVMState* jvms, uint idx) const {
368 assert(verify_jvms(jvms), "jvms must match");
369 Node* n = in(idx);
370 assert((!n->bottom_type()->isa_long() && !n->bottom_type()->isa_double()) ||
371 in(idx + 1)->is_top(), "2nd half of long/double");
372 }
373
374 public:
375 // Functionality from old debug nodes which has changed
376 Node *local(JVMState* jvms, uint idx) const {
377 verify_input(jvms, jvms->locoff() + idx);
378 return in(jvms->locoff() + idx);
379 }
380 Node *stack(JVMState* jvms, uint idx) const {
381 verify_input(jvms, jvms->stkoff() + idx);
382 return in(jvms->stkoff() + idx);
383 }
384 Node *argument(JVMState* jvms, uint idx) const {
385 verify_input(jvms, jvms->argoff() + idx);
386 return in(jvms->argoff() + idx);
387 }
388 Node *monitor_box(JVMState* jvms, uint idx) const {
389 assert(verify_jvms(jvms), "jvms must match");
390 return in(jvms->monitor_box_offset(idx));
391 }
392 Node *monitor_obj(JVMState* jvms, uint idx) const {
393 assert(verify_jvms(jvms), "jvms must match");
394 return in(jvms->monitor_obj_offset(idx));
395 }
396
397 void set_local(JVMState* jvms, uint idx, Node *c);
398
399 void set_stack(JVMState* jvms, uint idx, Node *c) {
400 assert(verify_jvms(jvms), "jvms must match");
401 set_req(jvms->stkoff() + idx, c);
402 }
403 void set_argument(JVMState* jvms, uint idx, Node *c) {
404 assert(verify_jvms(jvms), "jvms must match");
405 set_req(jvms->argoff() + idx, c);
406 }
407 void ensure_stack(JVMState* jvms, uint stk_size) {
408 assert(verify_jvms(jvms), "jvms must match");
409 int grow_by = (int)stk_size - (int)jvms->stk_size();
410 if (grow_by > 0) grow_stack(jvms, grow_by);
411 }
412 void grow_stack(JVMState* jvms, uint grow_by);
413 // Handle monitor stack
414 void push_monitor( const FastLockNode *lock );
415 void pop_monitor ();
416 Node *peek_monitor_box() const;
417 Node *peek_monitor_obj() const;
418 // Peek Operand Stacks, JVMS 2.6.2
419 Node* peek_operand(uint off = 0) const;
420
421 // Access functions for the JVM
422 Node *control () const { return in(TypeFunc::Control ); }
423 Node *i_o () const { return in(TypeFunc::I_O ); }
424 Node *memory () const { return in(TypeFunc::Memory ); }
425 Node *returnadr() const { return in(TypeFunc::ReturnAdr); }
426 Node *frameptr () const { return in(TypeFunc::FramePtr ); }
427
428 void set_control ( Node *c ) { set_req(TypeFunc::Control,c); }
429 void set_i_o ( Node *c ) { set_req(TypeFunc::I_O ,c); }
430 void set_memory ( Node *c ) { set_req(TypeFunc::Memory ,c); }
431
432 MergeMemNode* merged_memory() const {
433 return in(TypeFunc::Memory)->as_MergeMem();
434 }
435
436 // The parser marks useless maps as dead when it's done with them:
437 bool is_killed() { return in(TypeFunc::Control) == nullptr; }
438
439 // Exception states bubbling out of subgraphs such as inlined calls
440 // are recorded here. (There might be more than one, hence the "next".)
441 // This feature is used only for safepoints which serve as "maps"
442 // for JVM states during parsing, intrinsic expansion, etc.
443 SafePointNode* next_exception() const;
444 void set_next_exception(SafePointNode* n);
445 bool has_exceptions() const { return next_exception() != nullptr; }
446
447 // Helper methods to operate on replaced nodes
448 ReplacedNodes replaced_nodes() const {
449 return _replaced_nodes;
450 }
451
452 void set_replaced_nodes(ReplacedNodes replaced_nodes) {
453 _replaced_nodes = replaced_nodes;
454 }
455
456 void clone_replaced_nodes() {
457 _replaced_nodes.clone();
458 }
459 void record_replaced_node(Node* initial, Node* improved) {
460 _replaced_nodes.record(initial, improved);
461 }
462 void transfer_replaced_nodes_from(SafePointNode* sfpt, uint idx = 0) {
463 _replaced_nodes.transfer_from(sfpt->_replaced_nodes, idx);
464 }
465 void delete_replaced_nodes() {
466 _replaced_nodes.reset();
467 }
468 void apply_replaced_nodes(uint idx) {
469 _replaced_nodes.apply(this, idx);
470 }
471 void merge_replaced_nodes_with(SafePointNode* sfpt) {
472 _replaced_nodes.merge_with(sfpt->_replaced_nodes);
473 }
474 bool has_replaced_nodes() const {
475 return !_replaced_nodes.is_empty();
476 }
477 void set_has_ea_local_in_scope(bool b) {
478 _has_ea_local_in_scope = b;
479 }
480 bool has_ea_local_in_scope() const {
481 return _has_ea_local_in_scope;
482 }
483
484 void disconnect_from_root(PhaseIterGVN *igvn);
485
486 // Standard Node stuff
487 virtual int Opcode() const;
488 virtual bool pinned() const { return true; }
489 virtual const Type* Value(PhaseGVN* phase) const;
490 virtual const Type* bottom_type() const { return Type::CONTROL; }
491 virtual const TypePtr* adr_type() const { return _adr_type; }
492 void set_adr_type(const TypePtr* adr_type) { _adr_type = adr_type; }
493 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
494 virtual Node* Identity(PhaseGVN* phase);
495 virtual uint ideal_reg() const { return 0; }
496 virtual const RegMask &in_RegMask(uint) const;
497 virtual const RegMask &out_RegMask() const;
498 virtual uint match_edge(uint idx) const;
499
500 #ifndef PRODUCT
501 virtual void dump_spec(outputStream *st) const;
502 #endif
503 };
504
505 //------------------------------SafePointScalarObjectNode----------------------
506 // A SafePointScalarObjectNode represents the state of a scalarized object
507 // at a safepoint.
508 class SafePointScalarObjectNode: public TypeNode {
509 uint _first_index; // First input edge relative index of a SafePoint node where
510 // states of the scalarized object fields are collected.
511 // It is relative to the last (youngest) jvms->_scloff.
512 uint _n_fields; // Number of non-static fields of the scalarized object.
513
514 Node* _alloc; // Just for debugging purposes.
515
516 virtual uint hash() const;
517 virtual bool cmp( const Node &n ) const;
518
519 uint first_index() const { return _first_index; }
520
521 public:
522 SafePointScalarObjectNode(const TypeOopPtr* tp, Node* alloc, uint first_index, uint n_fields);
523
524 virtual int Opcode() const;
525 virtual uint ideal_reg() const;
526 virtual const RegMask &in_RegMask(uint) const;
527 virtual const RegMask &out_RegMask() const;
528 virtual uint match_edge(uint idx) const;
529
530 uint first_index(JVMState* jvms) const {
531 assert(jvms != nullptr, "missed JVMS");
532 return jvms->scloff() + _first_index;
533 }
534 uint n_fields() const { return _n_fields; }
535
536 #ifdef ASSERT
537 Node* alloc() const { return _alloc; }
538 #endif
539
540 virtual uint size_of() const { return sizeof(*this); }
541
542 // Assumes that "this" is an argument to a safepoint node "s", and that
543 // "new_call" is being created to correspond to "s". But the difference
544 // between the start index of the jvmstates of "new_call" and "s" is
545 // "jvms_adj". Produce and return a SafePointScalarObjectNode that
546 // corresponds appropriately to "this" in "new_call". Assumes that
547 // "sosn_map" is a map, specific to the translation of "s" to "new_call",
548 // mapping old SafePointScalarObjectNodes to new, to avoid multiple copies.
549 SafePointScalarObjectNode* clone(Dict* sosn_map, bool& new_node) const;
550
551 #ifndef PRODUCT
552 virtual void dump_spec(outputStream *st) const;
553 #endif
554 };
555
556 //------------------------------SafePointScalarMergeNode----------------------
557 //
558 // This class represents an allocation merge that is used as debug information
559 // and had at least one of its input scalar replaced.
560 //
561 // The required inputs of this node, except the control, are pointers to
562 // SafePointScalarObjectNodes that describe scalarized inputs of the original
563 // allocation merge. The other(s) properties of the class are described below.
564 //
565 // _merge_pointer_idx : index in the SafePointNode's input array where the
566 // description of the _allocation merge_ starts. The index is zero based and
567 // relative to the SafePoint's scloff. The two entries in the SafePointNode's
568 // input array starting at '_merge_pointer_idx` are Phi nodes representing:
569 //
570 // 1) The original merge Phi. During rematerialization this input will only be
571 // used if the "selector Phi" (see below) indicates that the execution of the
572 // Phi took the path of a non scalarized input.
573 //
574 // 2) A "selector Phi". The output of this Phi will be '-1' if the execution
575 // of the method exercised a non scalarized input of the original Phi.
576 // Otherwise, the output will be >=0, and it will indicate the index-1 in the
577 // SafePointScalarMergeNode input array where the description of the
578 // scalarized object that should be used is.
579 //
580 // As an example, consider a Phi merging 3 inputs, of which the last 2 are
581 // scalar replaceable.
582 //
583 // Phi(Region, NSR, SR, SR)
584 //
585 // During scalar replacement the SR inputs will be changed to null:
586 //
587 // Phi(Region, NSR, nullptr, nullptr)
588 //
589 // A corresponding selector Phi will be created with a configuration like this:
590 //
591 // Phi(Region, -1, 0, 1)
592 //
593 // During execution of the compiled method, if the execution reaches a Trap, the
594 // output of the selector Phi will tell if we need to rematerialize one of the
595 // scalar replaced inputs or if we should just use the pointer returned by the
596 // original Phi.
597
598 class SafePointScalarMergeNode: public TypeNode {
599 int _merge_pointer_idx; // This is the first input edge relative
600 // index of a SafePoint node where metadata information relative
601 // to restoring the merge is stored. The corresponding input
602 // in the associated SafePoint will point to a Phi representing
603 // potential non-scalar replaced objects.
604
605 virtual uint hash() const;
606 virtual bool cmp( const Node &n ) const;
607
608 public:
609 SafePointScalarMergeNode(const TypeOopPtr* tp, int merge_pointer_idx);
610
611 virtual int Opcode() const;
612 virtual uint ideal_reg() const;
613 virtual const RegMask &in_RegMask(uint) const;
614 virtual const RegMask &out_RegMask() const;
615 virtual uint match_edge(uint idx) const;
616
617 virtual uint size_of() const { return sizeof(*this); }
618
619 int merge_pointer_idx(JVMState* jvms) const {
620 assert(jvms != nullptr, "JVMS reference is null.");
621 return jvms->scloff() + _merge_pointer_idx;
622 }
623
624 int selector_idx(JVMState* jvms) const {
625 assert(jvms != nullptr, "JVMS reference is null.");
626 return jvms->scloff() + _merge_pointer_idx + 1;
627 }
628
629 // Assumes that "this" is an argument to a safepoint node "s", and that
630 // "new_call" is being created to correspond to "s". But the difference
631 // between the start index of the jvmstates of "new_call" and "s" is
632 // "jvms_adj". Produce and return a SafePointScalarObjectNode that
633 // corresponds appropriately to "this" in "new_call". Assumes that
634 // "sosn_map" is a map, specific to the translation of "s" to "new_call",
635 // mapping old SafePointScalarObjectNodes to new, to avoid multiple copies.
636 SafePointScalarMergeNode* clone(Dict* sosn_map, bool& new_node) const;
637
638 #ifndef PRODUCT
639 virtual void dump_spec(outputStream *st) const;
640 #endif
641 };
642
643 // Simple container for the outgoing projections of a call. Useful
644 // for serious surgery on calls.
645 class CallProjections : public StackObj {
646 public:
647 Node* fallthrough_proj;
648 Node* fallthrough_catchproj;
649 Node* fallthrough_memproj;
650 Node* fallthrough_ioproj;
651 Node* catchall_catchproj;
652 Node* catchall_memproj;
653 Node* catchall_ioproj;
654 Node* resproj;
655 Node* exobj;
656 };
657
658 class CallGenerator;
659
660 //------------------------------CallNode---------------------------------------
661 // Call nodes now subsume the function of debug nodes at callsites, so they
662 // contain the functionality of a full scope chain of debug nodes.
663 class CallNode : public SafePointNode {
664 friend class VMStructs;
665
666 protected:
667 bool may_modify_arraycopy_helper(const TypeOopPtr* dest_t, const TypeOopPtr* t_oop, PhaseValues* phase);
668
669 public:
670 const TypeFunc* _tf; // Function type
671 address _entry_point; // Address of method being called
672 float _cnt; // Estimate of number of times called
673 CallGenerator* _generator; // corresponding CallGenerator for some late inline calls
674 const char* _name; // Printable name, if _method is null
675
676 CallNode(const TypeFunc* tf, address addr, const TypePtr* adr_type, JVMState* jvms = nullptr)
677 : SafePointNode(tf->domain()->cnt(), jvms, adr_type),
678 _tf(tf),
679 _entry_point(addr),
680 _cnt(COUNT_UNKNOWN),
681 _generator(nullptr),
682 _name(nullptr)
683 {
684 init_class_id(Class_Call);
685 }
686
687 const TypeFunc* tf() const { return _tf; }
688 address entry_point() const { return _entry_point; }
689 float cnt() const { return _cnt; }
690 CallGenerator* generator() const { return _generator; }
691
692 void set_tf(const TypeFunc* tf) { _tf = tf; }
693 void set_entry_point(address p) { _entry_point = p; }
694 void set_cnt(float c) { _cnt = c; }
695 void set_generator(CallGenerator* cg) { _generator = cg; }
696
697 virtual const Type* bottom_type() const;
698 virtual const Type* Value(PhaseGVN* phase) const;
699 virtual Node* Ideal(PhaseGVN* phase, bool can_reshape);
700 virtual Node* Identity(PhaseGVN* phase) { return this; }
701 virtual bool cmp(const Node &n) const;
702 virtual uint size_of() const = 0;
703 virtual void calling_convention(BasicType* sig_bt, VMRegPair* parm_regs, uint argcnt) const;
704 virtual Node* match(const ProjNode* proj, const Matcher* m);
705 virtual uint ideal_reg() const { return NotAMachineReg; }
706 // Are we guaranteed that this node is a safepoint? Not true for leaf calls and
707 // for some macro nodes whose expansion does not have a safepoint on the fast path.
708 virtual bool guaranteed_safepoint() { return true; }
709 // For macro nodes, the JVMState gets modified during expansion. If calls
710 // use MachConstantBase, it gets modified during matching. So when cloning
711 // the node the JVMState must be deep cloned. Default is to shallow clone.
712 virtual bool needs_deep_clone_jvms(Compile* C) { return C->needs_deep_clone_jvms(); }
713
714 // Returns true if the call may modify n
715 virtual bool may_modify(const TypeOopPtr* t_oop, PhaseValues* phase);
716 // Does this node have a use of n other than in debug information?
717 bool has_non_debug_use(Node* n);
718 // Returns the unique CheckCastPP of a call
719 // or result projection is there are several CheckCastPP
720 // or returns null if there is no one.
721 Node* result_cast();
722 // Does this node returns pointer?
723 bool returns_pointer() const {
724 const TypeTuple* r = tf()->range();
725 return (r->cnt() > TypeFunc::Parms &&
726 r->field_at(TypeFunc::Parms)->isa_ptr());
727 }
728
729 // Collect all the interesting edges from a call for use in
730 // replacing the call by something else. Used by macro expansion
731 // and the late inlining support.
732 void extract_projections(CallProjections* projs, bool separate_io_proj, bool do_asserts = true);
733
734 virtual uint match_edge(uint idx) const;
735
736 bool is_call_to_arraycopystub() const;
737
738 virtual void copy_call_debug_info(PhaseIterGVN* phase, SafePointNode* sfpt) {}
739
740 #ifndef PRODUCT
741 virtual void dump_req(outputStream* st = tty, DumpConfig* dc = nullptr) const;
742 virtual void dump_spec(outputStream* st) const;
743 #endif
744 };
745
746
747 //------------------------------CallJavaNode-----------------------------------
748 // Make a static or dynamic subroutine call node using Java calling
749 // convention. (The "Java" calling convention is the compiler's calling
750 // convention, as opposed to the interpreter's or that of native C.)
751 class CallJavaNode : public CallNode {
752 friend class VMStructs;
753 protected:
754 virtual bool cmp( const Node &n ) const;
755 virtual uint size_of() const; // Size is bigger
756
757 bool _optimized_virtual;
758 bool _method_handle_invoke;
759 bool _override_symbolic_info; // Override symbolic call site info from bytecode
760 ciMethod* _method; // Method being direct called
761 bool _arg_escape; // ArgEscape in parameter list
762 public:
763 CallJavaNode(const TypeFunc* tf , address addr, ciMethod* method)
764 : CallNode(tf, addr, TypePtr::BOTTOM),
765 _optimized_virtual(false),
766 _method_handle_invoke(false),
767 _override_symbolic_info(false),
768 _method(method),
769 _arg_escape(false)
770 {
771 init_class_id(Class_CallJava);
772 }
773
774 virtual int Opcode() const;
775 ciMethod* method() const { return _method; }
776 void set_method(ciMethod *m) { _method = m; }
777 void set_optimized_virtual(bool f) { _optimized_virtual = f; }
778 bool is_optimized_virtual() const { return _optimized_virtual; }
779 void set_method_handle_invoke(bool f) { _method_handle_invoke = f; }
780 bool is_method_handle_invoke() const { return _method_handle_invoke; }
781 void set_override_symbolic_info(bool f) { _override_symbolic_info = f; }
782 bool override_symbolic_info() const { return _override_symbolic_info; }
783 void set_arg_escape(bool f) { _arg_escape = f; }
784 bool arg_escape() const { return _arg_escape; }
785 void copy_call_debug_info(PhaseIterGVN* phase, SafePointNode *sfpt);
786
787 DEBUG_ONLY( bool validate_symbolic_info() const; )
788
789 #ifndef PRODUCT
790 virtual void dump_spec(outputStream *st) const;
791 virtual void dump_compact_spec(outputStream *st) const;
792 #endif
793 };
794
795 //------------------------------CallStaticJavaNode-----------------------------
796 // Make a direct subroutine call using Java calling convention (for static
797 // calls and optimized virtual calls, plus calls to wrappers for run-time
798 // routines); generates static stub.
799 class CallStaticJavaNode : public CallJavaNode {
800 virtual bool cmp( const Node &n ) const;
801 virtual uint size_of() const; // Size is bigger
802 public:
803 CallStaticJavaNode(Compile* C, const TypeFunc* tf, address addr, ciMethod* method)
804 : CallJavaNode(tf, addr, method) {
805 init_class_id(Class_CallStaticJava);
806 if (C->eliminate_boxing() && (method != nullptr) && method->is_boxing_method()) {
807 init_flags(Flag_is_macro);
808 C->add_macro_node(this);
809 }
810 }
811 CallStaticJavaNode(const TypeFunc* tf, address addr, const char* name, const TypePtr* adr_type)
812 : CallJavaNode(tf, addr, nullptr) {
813 init_class_id(Class_CallStaticJava);
814 // This node calls a runtime stub, which often has narrow memory effects.
815 _adr_type = adr_type;
816 _name = name;
817 }
818
819 // If this is an uncommon trap, return the request code, else zero.
820 int uncommon_trap_request() const;
821 bool is_uncommon_trap() const;
822 static int extract_uncommon_trap_request(const Node* call);
823
824 bool is_boxing_method() const {
825 return is_macro() && (method() != nullptr) && method()->is_boxing_method();
826 }
827 // Late inlining modifies the JVMState, so we need to deep clone it
828 // when the call node is cloned (because it is macro node).
829 virtual bool needs_deep_clone_jvms(Compile* C) {
830 return is_boxing_method() || CallNode::needs_deep_clone_jvms(C);
831 }
832
833 virtual int Opcode() const;
834 virtual Node* Ideal(PhaseGVN* phase, bool can_reshape);
835
836 #ifndef PRODUCT
837 virtual void dump_spec(outputStream *st) const;
838 virtual void dump_compact_spec(outputStream *st) const;
839 #endif
840 };
841
842 //------------------------------CallDynamicJavaNode----------------------------
843 // Make a dispatched call using Java calling convention.
844 class CallDynamicJavaNode : public CallJavaNode {
845 virtual bool cmp( const Node &n ) const;
846 virtual uint size_of() const; // Size is bigger
847 public:
848 CallDynamicJavaNode(const TypeFunc* tf , address addr, ciMethod* method, int vtable_index)
849 : CallJavaNode(tf,addr,method), _vtable_index(vtable_index) {
850 init_class_id(Class_CallDynamicJava);
851 }
852
853 // Late inlining modifies the JVMState, so we need to deep clone it
854 // when the call node is cloned.
855 virtual bool needs_deep_clone_jvms(Compile* C) {
856 return IncrementalInlineVirtual || CallNode::needs_deep_clone_jvms(C);
857 }
858
859 int _vtable_index;
860 virtual int Opcode() const;
861 virtual Node* Ideal(PhaseGVN* phase, bool can_reshape);
862 #ifndef PRODUCT
863 virtual void dump_spec(outputStream *st) const;
864 #endif
865 };
866
867 //------------------------------CallRuntimeNode--------------------------------
868 // Make a direct subroutine call node into compiled C++ code.
869 class CallRuntimeNode : public CallNode {
870 protected:
871 virtual bool cmp( const Node &n ) const;
872 virtual uint size_of() const; // Size is bigger
873 public:
874 CallRuntimeNode(const TypeFunc* tf, address addr, const char* name,
875 const TypePtr* adr_type, JVMState* jvms = nullptr)
876 : CallNode(tf, addr, adr_type, jvms)
877 {
878 init_class_id(Class_CallRuntime);
879 _name = name;
880 }
881
882 virtual int Opcode() const;
883 virtual void calling_convention( BasicType* sig_bt, VMRegPair *parm_regs, uint argcnt ) const;
884
885 #ifndef PRODUCT
886 virtual void dump_spec(outputStream *st) const;
887 #endif
888 };
889
890 //------------------------------CallLeafNode-----------------------------------
891 // Make a direct subroutine call node into compiled C++ code, without
892 // safepoints
893 class CallLeafNode : public CallRuntimeNode {
894 public:
895 CallLeafNode(const TypeFunc* tf, address addr, const char* name,
896 const TypePtr* adr_type)
897 : CallRuntimeNode(tf, addr, name, adr_type)
898 {
899 init_class_id(Class_CallLeaf);
900 }
901 virtual int Opcode() const;
902 virtual bool guaranteed_safepoint() { return false; }
903 #ifndef PRODUCT
904 virtual void dump_spec(outputStream *st) const;
905 #endif
906 };
907
908 //------------------------------CallLeafNoFPNode-------------------------------
909 // CallLeafNode, not using floating point or using it in the same manner as
910 // the generated code
911 class CallLeafNoFPNode : public CallLeafNode {
912 public:
913 CallLeafNoFPNode(const TypeFunc* tf, address addr, const char* name,
914 const TypePtr* adr_type)
915 : CallLeafNode(tf, addr, name, adr_type)
916 {
917 init_class_id(Class_CallLeafNoFP);
918 }
919 virtual int Opcode() const;
920 };
921
922 //------------------------------CallLeafVectorNode-------------------------------
923 // CallLeafNode but calling with vector calling convention instead.
924 class CallLeafVectorNode : public CallLeafNode {
925 private:
926 uint _num_bits;
927 protected:
928 virtual bool cmp( const Node &n ) const;
929 virtual uint size_of() const; // Size is bigger
930 public:
931 CallLeafVectorNode(const TypeFunc* tf, address addr, const char* name,
932 const TypePtr* adr_type, uint num_bits)
933 : CallLeafNode(tf, addr, name, adr_type), _num_bits(num_bits)
934 {
935 }
936 virtual int Opcode() const;
937 virtual void calling_convention( BasicType* sig_bt, VMRegPair *parm_regs, uint argcnt ) const;
938 };
939
940
941 //------------------------------Allocate---------------------------------------
942 // High-level memory allocation
943 //
944 // AllocateNode and AllocateArrayNode are subclasses of CallNode because they will
945 // get expanded into a code sequence containing a call. Unlike other CallNodes,
946 // they have 2 memory projections and 2 i_o projections (which are distinguished by
947 // the _is_io_use flag in the projection.) This is needed when expanding the node in
948 // order to differentiate the uses of the projection on the normal control path from
949 // those on the exception return path.
950 //
951 class AllocateNode : public CallNode {
952 public:
953 enum {
954 // Output:
955 RawAddress = TypeFunc::Parms, // the newly-allocated raw address
956 // Inputs:
957 AllocSize = TypeFunc::Parms, // size (in bytes) of the new object
958 KlassNode, // type (maybe dynamic) of the obj.
959 InitialTest, // slow-path test (may be constant)
960 ALength, // array length (or TOP if none)
961 ValidLengthTest,
962 ParmLimit
963 };
964
965 static const TypeFunc* alloc_type(const Type* t) {
966 const Type** fields = TypeTuple::fields(ParmLimit - TypeFunc::Parms);
967 fields[AllocSize] = TypeInt::POS;
968 fields[KlassNode] = TypeInstPtr::NOTNULL;
969 fields[InitialTest] = TypeInt::BOOL;
970 fields[ALength] = t; // length (can be a bad length)
971 fields[ValidLengthTest] = TypeInt::BOOL;
972
973 const TypeTuple *domain = TypeTuple::make(ParmLimit, fields);
974
975 // create result type (range)
976 fields = TypeTuple::fields(1);
977 fields[TypeFunc::Parms+0] = TypeRawPtr::NOTNULL; // Returned oop
978
979 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+1, fields);
980
981 return TypeFunc::make(domain, range);
982 }
983
984 // Result of Escape Analysis
985 bool _is_scalar_replaceable;
986 bool _is_non_escaping;
987 // True when MemBar for new is redundant with MemBar at initialzer exit
988 bool _is_allocation_MemBar_redundant;
989
990 virtual uint size_of() const; // Size is bigger
991 AllocateNode(Compile* C, const TypeFunc *atype, Node *ctrl, Node *mem, Node *abio,
992 Node *size, Node *klass_node, Node *initial_test);
993 // Expansion modifies the JVMState, so we need to deep clone it
994 virtual bool needs_deep_clone_jvms(Compile* C) { return true; }
995 virtual int Opcode() const;
996 virtual uint ideal_reg() const { return Op_RegP; }
997 virtual bool guaranteed_safepoint() { return false; }
998
999 // allocations do not modify their arguments
1000 virtual bool may_modify(const TypeOopPtr* t_oop, PhaseValues* phase) { return false;}
1001
1002 // Pattern-match a possible usage of AllocateNode.
1003 // Return null if no allocation is recognized.
1004 // The operand is the pointer produced by the (possible) allocation.
1005 // It must be a projection of the Allocate or its subsequent CastPP.
1006 // (Note: This function is defined in file graphKit.cpp, near
1007 // GraphKit::new_instance/new_array, whose output it recognizes.)
1008 // The 'ptr' may not have an offset unless the 'offset' argument is given.
1009 static AllocateNode* Ideal_allocation(Node* ptr);
1010
1011 // Fancy version which uses AddPNode::Ideal_base_and_offset to strip
1012 // an offset, which is reported back to the caller.
1013 // (Note: AllocateNode::Ideal_allocation is defined in graphKit.cpp.)
1014 static AllocateNode* Ideal_allocation(Node* ptr, PhaseValues* phase,
1015 intptr_t& offset);
1016
1017 // Dig the klass operand out of a (possible) allocation site.
1018 static Node* Ideal_klass(Node* ptr, PhaseValues* phase) {
1019 AllocateNode* allo = Ideal_allocation(ptr);
1020 return (allo == nullptr) ? nullptr : allo->in(KlassNode);
1021 }
1022
1023 // Conservatively small estimate of offset of first non-header byte.
1024 int minimum_header_size() {
1025 return is_AllocateArray() ? arrayOopDesc::base_offset_in_bytes(T_BYTE) :
1026 instanceOopDesc::base_offset_in_bytes();
1027 }
1028
1029 // Return the corresponding initialization barrier (or null if none).
1030 // Walks out edges to find it...
1031 // (Note: Both InitializeNode::allocation and AllocateNode::initialization
1032 // are defined in graphKit.cpp, which sets up the bidirectional relation.)
1033 InitializeNode* initialization();
1034
1035 // Convenience for initialization->maybe_set_complete(phase)
1036 bool maybe_set_complete(PhaseGVN* phase);
1037
1038 // Return true if allocation doesn't escape thread, its escape state
1039 // needs be noEscape or ArgEscape. InitializeNode._does_not_escape
1040 // is true when its allocation's escape state is noEscape or
1041 // ArgEscape. In case allocation's InitializeNode is null, check
1042 // AlllocateNode._is_non_escaping flag.
1043 // AlllocateNode._is_non_escaping is true when its escape state is
1044 // noEscape.
1045 bool does_not_escape_thread() {
1046 InitializeNode* init = nullptr;
1047 return _is_non_escaping || (((init = initialization()) != nullptr) && init->does_not_escape());
1048 }
1049
1050 // If object doesn't escape in <.init> method and there is memory barrier
1051 // inserted at exit of its <.init>, memory barrier for new is not necessary.
1052 // Inovke this method when MemBar at exit of initializer and post-dominate
1053 // allocation node.
1054 void compute_MemBar_redundancy(ciMethod* initializer);
1055 bool is_allocation_MemBar_redundant() { return _is_allocation_MemBar_redundant; }
1056
1057 Node* make_ideal_mark(PhaseGVN *phase, Node* obj, Node* control, Node* mem);
1058 };
1059
1060 //------------------------------AllocateArray---------------------------------
1061 //
1062 // High-level array allocation
1063 //
1064 class AllocateArrayNode : public AllocateNode {
1065 public:
1066 AllocateArrayNode(Compile* C, const TypeFunc* atype, Node* ctrl, Node* mem, Node* abio, Node* size, Node* klass_node,
1067 Node* initial_test, Node* count_val, Node* valid_length_test)
1068 : AllocateNode(C, atype, ctrl, mem, abio, size, klass_node,
1069 initial_test)
1070 {
1071 init_class_id(Class_AllocateArray);
1072 set_req(AllocateNode::ALength, count_val);
1073 set_req(AllocateNode::ValidLengthTest, valid_length_test);
1074 }
1075 virtual int Opcode() const;
1076
1077 // Dig the length operand out of a array allocation site.
1078 Node* Ideal_length() {
1079 return in(AllocateNode::ALength);
1080 }
1081
1082 // Dig the length operand out of a array allocation site and narrow the
1083 // type with a CastII, if necesssary
1084 Node* make_ideal_length(const TypeOopPtr* ary_type, PhaseValues* phase, bool can_create = true);
1085
1086 // Pattern-match a possible usage of AllocateArrayNode.
1087 // Return null if no allocation is recognized.
1088 static AllocateArrayNode* Ideal_array_allocation(Node* ptr) {
1089 AllocateNode* allo = Ideal_allocation(ptr);
1090 return (allo == nullptr || !allo->is_AllocateArray())
1091 ? nullptr : allo->as_AllocateArray();
1092 }
1093 };
1094
1095 //------------------------------AbstractLockNode-----------------------------------
1096 class AbstractLockNode: public CallNode {
1097 private:
1098 enum {
1099 Regular = 0, // Normal lock
1100 NonEscObj, // Lock is used for non escaping object
1101 Coarsened, // Lock was coarsened
1102 Nested // Nested lock
1103 } _kind;
1104
1105 static const char* _kind_names[Nested+1];
1106
1107 #ifndef PRODUCT
1108 NamedCounter* _counter;
1109 #endif
1110
1111 protected:
1112 // helper functions for lock elimination
1113 //
1114
1115 bool find_matching_unlock(const Node* ctrl, LockNode* lock,
1116 GrowableArray<AbstractLockNode*> &lock_ops);
1117 bool find_lock_and_unlock_through_if(Node* node, LockNode* lock,
1118 GrowableArray<AbstractLockNode*> &lock_ops);
1119 bool find_unlocks_for_region(const RegionNode* region, LockNode* lock,
1120 GrowableArray<AbstractLockNode*> &lock_ops);
1121 LockNode *find_matching_lock(UnlockNode* unlock);
1122
1123 // Update the counter to indicate that this lock was eliminated.
1124 void set_eliminated_lock_counter() PRODUCT_RETURN;
1125
1126 public:
1127 AbstractLockNode(const TypeFunc *tf)
1128 : CallNode(tf, nullptr, TypeRawPtr::BOTTOM),
1129 _kind(Regular)
1130 {
1131 #ifndef PRODUCT
1132 _counter = nullptr;
1133 #endif
1134 }
1135 virtual int Opcode() const = 0;
1136 Node * obj_node() const {return in(TypeFunc::Parms + 0); }
1137 Node * box_node() const {return in(TypeFunc::Parms + 1); }
1138 Node * fastlock_node() const {return in(TypeFunc::Parms + 2); }
1139 void set_box_node(Node* box) { set_req(TypeFunc::Parms + 1, box); }
1140
1141 const Type *sub(const Type *t1, const Type *t2) const { return TypeInt::CC;}
1142
1143 virtual uint size_of() const { return sizeof(*this); }
1144
1145 bool is_eliminated() const { return (_kind != Regular); }
1146 bool is_non_esc_obj() const { return (_kind == NonEscObj); }
1147 bool is_coarsened() const { return (_kind == Coarsened); }
1148 bool is_nested() const { return (_kind == Nested); }
1149
1150 const char * kind_as_string() const;
1151 void log_lock_optimization(Compile* c, const char * tag, Node* bad_lock = nullptr) const;
1152
1153 void set_non_esc_obj() { _kind = NonEscObj; set_eliminated_lock_counter(); }
1154 void set_coarsened() { _kind = Coarsened; set_eliminated_lock_counter(); }
1155 void set_nested() { _kind = Nested; set_eliminated_lock_counter(); }
1156
1157 // locking does not modify its arguments
1158 virtual bool may_modify(const TypeOopPtr* t_oop, PhaseValues* phase){ return false; }
1159
1160 #ifndef PRODUCT
1161 void create_lock_counter(JVMState* s);
1162 NamedCounter* counter() const { return _counter; }
1163 virtual void dump_spec(outputStream* st) const;
1164 virtual void dump_compact_spec(outputStream* st) const;
1165 #endif
1166 };
1167
1168 //------------------------------Lock---------------------------------------
1169 // High-level lock operation
1170 //
1171 // This is a subclass of CallNode because it is a macro node which gets expanded
1172 // into a code sequence containing a call. This node takes 3 "parameters":
1173 // 0 - object to lock
1174 // 1 - a BoxLockNode
1175 // 2 - a FastLockNode
1176 //
1177 class LockNode : public AbstractLockNode {
1178 public:
1179
1180 static const TypeFunc *lock_type() {
1181 // create input type (domain)
1182 const Type **fields = TypeTuple::fields(3);
1183 fields[TypeFunc::Parms+0] = TypeInstPtr::NOTNULL; // Object to be Locked
1184 fields[TypeFunc::Parms+1] = TypeRawPtr::BOTTOM; // Address of stack location for lock
1185 fields[TypeFunc::Parms+2] = TypeInt::BOOL; // FastLock
1186 const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+3,fields);
1187
1188 // create result type (range)
1189 fields = TypeTuple::fields(0);
1190
1191 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+0,fields);
1192
1193 return TypeFunc::make(domain,range);
1194 }
1195
1196 virtual int Opcode() const;
1197 virtual uint size_of() const; // Size is bigger
1198 LockNode(Compile* C, const TypeFunc *tf) : AbstractLockNode( tf ) {
1199 init_class_id(Class_Lock);
1200 init_flags(Flag_is_macro);
1201 C->add_macro_node(this);
1202 }
1203 virtual bool guaranteed_safepoint() { return false; }
1204
1205 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
1206 // Expansion modifies the JVMState, so we need to deep clone it
1207 virtual bool needs_deep_clone_jvms(Compile* C) { return true; }
1208
1209 bool is_nested_lock_region(); // Is this Lock nested?
1210 bool is_nested_lock_region(Compile * c); // Why isn't this Lock nested?
1211 };
1212
1213 //------------------------------Unlock---------------------------------------
1214 // High-level unlock operation
1215 class UnlockNode : public AbstractLockNode {
1216 private:
1217 #ifdef ASSERT
1218 JVMState* const _dbg_jvms; // Pointer to list of JVM State objects
1219 #endif
1220 public:
1221 virtual int Opcode() const;
1222 virtual uint size_of() const; // Size is bigger
1223 UnlockNode(Compile* C, const TypeFunc *tf) : AbstractLockNode( tf )
1224 #ifdef ASSERT
1225 , _dbg_jvms(nullptr)
1226 #endif
1227 {
1228 init_class_id(Class_Unlock);
1229 init_flags(Flag_is_macro);
1230 C->add_macro_node(this);
1231 }
1232 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
1233 // unlock is never a safepoint
1234 virtual bool guaranteed_safepoint() { return false; }
1235 #ifdef ASSERT
1236 void set_dbg_jvms(JVMState* s) {
1237 *(JVMState**)&_dbg_jvms = s; // override const attribute in the accessor
1238 }
1239 JVMState* dbg_jvms() const { return _dbg_jvms; }
1240 #else
1241 JVMState* dbg_jvms() const { return nullptr; }
1242 #endif
1243 };
1244 #endif // SHARE_OPTO_CALLNODE_HPP