Wed, 02 Jul 2008 12:55:16 -0700
6719955: Update copyright year
Summary: Update copyright year for files that have been modified in 2008
Reviewed-by: ohair, tbell
1 /*
2 * Copyright 1997-2008 Sun Microsystems, Inc. All Rights Reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 *
23 */
25 // Portions of code courtesy of Clifford Click
27 // Optimization - Graph Style
29 class Chaitin;
30 class NamedCounter;
31 class MultiNode;
32 class SafePointNode;
33 class CallNode;
34 class CallJavaNode;
35 class CallStaticJavaNode;
36 class CallDynamicJavaNode;
37 class CallRuntimeNode;
38 class CallLeafNode;
39 class CallLeafNoFPNode;
40 class AllocateNode;
41 class AllocateArrayNode;
42 class LockNode;
43 class UnlockNode;
44 class JVMState;
45 class OopMap;
46 class State;
47 class StartNode;
48 class MachCallNode;
49 class FastLockNode;
51 //------------------------------StartNode--------------------------------------
52 // The method start node
53 class StartNode : public MultiNode {
54 virtual uint cmp( const Node &n ) const;
55 virtual uint size_of() const; // Size is bigger
56 public:
57 const TypeTuple *_domain;
58 StartNode( Node *root, const TypeTuple *domain ) : MultiNode(2), _domain(domain) {
59 init_class_id(Class_Start);
60 init_flags(Flag_is_block_start);
61 init_req(0,this);
62 init_req(1,root);
63 }
64 virtual int Opcode() const;
65 virtual bool pinned() const { return true; };
66 virtual const Type *bottom_type() const;
67 virtual const TypePtr *adr_type() const { return TypePtr::BOTTOM; }
68 virtual const Type *Value( PhaseTransform *phase ) const;
69 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
70 virtual void calling_convention( BasicType* sig_bt, VMRegPair *parm_reg, uint length ) const;
71 virtual const RegMask &in_RegMask(uint) const;
72 virtual Node *match( const ProjNode *proj, const Matcher *m );
73 virtual uint ideal_reg() const { return 0; }
74 #ifndef PRODUCT
75 virtual void dump_spec(outputStream *st) const;
76 #endif
77 };
79 //------------------------------StartOSRNode-----------------------------------
80 // The method start node for on stack replacement code
81 class StartOSRNode : public StartNode {
82 public:
83 StartOSRNode( Node *root, const TypeTuple *domain ) : StartNode(root, domain) {}
84 virtual int Opcode() const;
85 static const TypeTuple *osr_domain();
86 };
89 //------------------------------ParmNode---------------------------------------
90 // Incoming parameters
91 class ParmNode : public ProjNode {
92 static const char * const names[TypeFunc::Parms+1];
93 public:
94 ParmNode( StartNode *src, uint con ) : ProjNode(src,con) {
95 init_class_id(Class_Parm);
96 }
97 virtual int Opcode() const;
98 virtual bool is_CFG() const { return (_con == TypeFunc::Control); }
99 virtual uint ideal_reg() const;
100 #ifndef PRODUCT
101 virtual void dump_spec(outputStream *st) const;
102 #endif
103 };
106 //------------------------------ReturnNode-------------------------------------
107 // Return from subroutine node
108 class ReturnNode : public Node {
109 public:
110 ReturnNode( uint edges, Node *cntrl, Node *i_o, Node *memory, Node *retadr, Node *frameptr );
111 virtual int Opcode() const;
112 virtual bool is_CFG() const { return true; }
113 virtual uint hash() const { return NO_HASH; } // CFG nodes do not hash
114 virtual bool depends_only_on_test() const { return false; }
115 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
116 virtual const Type *Value( PhaseTransform *phase ) const;
117 virtual uint ideal_reg() const { return NotAMachineReg; }
118 virtual uint match_edge(uint idx) const;
119 #ifndef PRODUCT
120 virtual void dump_req() const;
121 #endif
122 };
125 //------------------------------RethrowNode------------------------------------
126 // Rethrow of exception at call site. Ends a procedure before rethrowing;
127 // ends the current basic block like a ReturnNode. Restores registers and
128 // unwinds stack. Rethrow happens in the caller's method.
129 class RethrowNode : public Node {
130 public:
131 RethrowNode( Node *cntrl, Node *i_o, Node *memory, Node *frameptr, Node *ret_adr, Node *exception );
132 virtual int Opcode() const;
133 virtual bool is_CFG() const { return true; }
134 virtual uint hash() const { return NO_HASH; } // CFG nodes do not hash
135 virtual bool depends_only_on_test() const { return false; }
136 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
137 virtual const Type *Value( PhaseTransform *phase ) const;
138 virtual uint match_edge(uint idx) const;
139 virtual uint ideal_reg() const { return NotAMachineReg; }
140 #ifndef PRODUCT
141 virtual void dump_req() const;
142 #endif
143 };
146 //------------------------------TailCallNode-----------------------------------
147 // Pop stack frame and jump indirect
148 class TailCallNode : public ReturnNode {
149 public:
150 TailCallNode( Node *cntrl, Node *i_o, Node *memory, Node *frameptr, Node *retadr, Node *target, Node *moop )
151 : ReturnNode( TypeFunc::Parms+2, cntrl, i_o, memory, frameptr, retadr ) {
152 init_req(TypeFunc::Parms, target);
153 init_req(TypeFunc::Parms+1, moop);
154 }
156 virtual int Opcode() const;
157 virtual uint match_edge(uint idx) const;
158 };
160 //------------------------------TailJumpNode-----------------------------------
161 // Pop stack frame and jump indirect
162 class TailJumpNode : public ReturnNode {
163 public:
164 TailJumpNode( Node *cntrl, Node *i_o, Node *memory, Node *frameptr, Node *target, Node *ex_oop)
165 : ReturnNode(TypeFunc::Parms+2, cntrl, i_o, memory, frameptr, Compile::current()->top()) {
166 init_req(TypeFunc::Parms, target);
167 init_req(TypeFunc::Parms+1, ex_oop);
168 }
170 virtual int Opcode() const;
171 virtual uint match_edge(uint idx) const;
172 };
174 //-------------------------------JVMState-------------------------------------
175 // A linked list of JVMState nodes captures the whole interpreter state,
176 // plus GC roots, for all active calls at some call site in this compilation
177 // unit. (If there is no inlining, then the list has exactly one link.)
178 // This provides a way to map the optimized program back into the interpreter,
179 // or to let the GC mark the stack.
180 class JVMState : public ResourceObj {
181 private:
182 JVMState* _caller; // List pointer for forming scope chains
183 uint _depth; // One mroe than caller depth, or one.
184 uint _locoff; // Offset to locals in input edge mapping
185 uint _stkoff; // Offset to stack in input edge mapping
186 uint _monoff; // Offset to monitors in input edge mapping
187 uint _scloff; // Offset to fields of scalar objs in input edge mapping
188 uint _endoff; // Offset to end of input edge mapping
189 uint _sp; // Jave Expression Stack Pointer for this state
190 int _bci; // Byte Code Index of this JVM point
191 ciMethod* _method; // Method Pointer
192 SafePointNode* _map; // Map node associated with this scope
193 public:
194 friend class Compile;
196 // Because JVMState objects live over the entire lifetime of the
197 // Compile object, they are allocated into the comp_arena, which
198 // does not get resource marked or reset during the compile process
199 void *operator new( size_t x, Compile* C ) { return C->comp_arena()->Amalloc(x); }
200 void operator delete( void * ) { } // fast deallocation
202 // Create a new JVMState, ready for abstract interpretation.
203 JVMState(ciMethod* method, JVMState* caller);
204 JVMState(int stack_size); // root state; has a null method
206 // Access functions for the JVM
207 uint locoff() const { return _locoff; }
208 uint stkoff() const { return _stkoff; }
209 uint argoff() const { return _stkoff + _sp; }
210 uint monoff() const { return _monoff; }
211 uint scloff() const { return _scloff; }
212 uint endoff() const { return _endoff; }
213 uint oopoff() const { return debug_end(); }
215 int loc_size() const { return _stkoff - _locoff; }
216 int stk_size() const { return _monoff - _stkoff; }
217 int mon_size() const { return _scloff - _monoff; }
218 int scl_size() const { return _endoff - _scloff; }
220 bool is_loc(uint i) const { return i >= _locoff && i < _stkoff; }
221 bool is_stk(uint i) const { return i >= _stkoff && i < _monoff; }
222 bool is_mon(uint i) const { return i >= _monoff && i < _scloff; }
223 bool is_scl(uint i) const { return i >= _scloff && i < _endoff; }
225 uint sp() const { return _sp; }
226 int bci() const { return _bci; }
227 bool has_method() const { return _method != NULL; }
228 ciMethod* method() const { assert(has_method(), ""); return _method; }
229 JVMState* caller() const { return _caller; }
230 SafePointNode* map() const { return _map; }
231 uint depth() const { return _depth; }
232 uint debug_start() const; // returns locoff of root caller
233 uint debug_end() const; // returns endoff of self
234 uint debug_size() const {
235 return loc_size() + sp() + mon_size() + scl_size();
236 }
237 uint debug_depth() const; // returns sum of debug_size values at all depths
239 // Returns the JVM state at the desired depth (1 == root).
240 JVMState* of_depth(int d) const;
242 // Tells if two JVM states have the same call chain (depth, methods, & bcis).
243 bool same_calls_as(const JVMState* that) const;
245 // Monitors (monitors are stored as (boxNode, objNode) pairs
246 enum { logMonitorEdges = 1 };
247 int nof_monitors() const { return mon_size() >> logMonitorEdges; }
248 int monitor_depth() const { return nof_monitors() + (caller() ? caller()->monitor_depth() : 0); }
249 int monitor_box_offset(int idx) const { return monoff() + (idx << logMonitorEdges) + 0; }
250 int monitor_obj_offset(int idx) const { return monoff() + (idx << logMonitorEdges) + 1; }
251 bool is_monitor_box(uint off) const {
252 assert(is_mon(off), "should be called only for monitor edge");
253 return (0 == bitfield(off - monoff(), 0, logMonitorEdges));
254 }
255 bool is_monitor_use(uint off) const { return (is_mon(off)
256 && is_monitor_box(off))
257 || (caller() && caller()->is_monitor_use(off)); }
259 // Initialization functions for the JVM
260 void set_locoff(uint off) { _locoff = off; }
261 void set_stkoff(uint off) { _stkoff = off; }
262 void set_monoff(uint off) { _monoff = off; }
263 void set_scloff(uint off) { _scloff = off; }
264 void set_endoff(uint off) { _endoff = off; }
265 void set_offsets(uint off) {
266 _locoff = _stkoff = _monoff = _scloff = _endoff = off;
267 }
268 void set_map(SafePointNode *map) { _map = map; }
269 void set_sp(uint sp) { _sp = sp; }
270 void set_bci(int bci) { _bci = bci; }
272 // Miscellaneous utility functions
273 JVMState* clone_deep(Compile* C) const; // recursively clones caller chain
274 JVMState* clone_shallow(Compile* C) const; // retains uncloned caller
276 #ifndef PRODUCT
277 void format(PhaseRegAlloc *regalloc, const Node *n, outputStream* st) const;
278 void dump_spec(outputStream *st) const;
279 void dump_on(outputStream* st) const;
280 void dump() const {
281 dump_on(tty);
282 }
283 #endif
284 };
286 //------------------------------SafePointNode----------------------------------
287 // A SafePointNode is a subclass of a MultiNode for convenience (and
288 // potential code sharing) only - conceptually it is independent of
289 // the Node semantics.
290 class SafePointNode : public MultiNode {
291 virtual uint cmp( const Node &n ) const;
292 virtual uint size_of() const; // Size is bigger
294 public:
295 SafePointNode(uint edges, JVMState* jvms,
296 // A plain safepoint advertises no memory effects (NULL):
297 const TypePtr* adr_type = NULL)
298 : MultiNode( edges ),
299 _jvms(jvms),
300 _oop_map(NULL),
301 _adr_type(adr_type)
302 {
303 init_class_id(Class_SafePoint);
304 }
306 OopMap* _oop_map; // Array of OopMap info (8-bit char) for GC
307 JVMState* const _jvms; // Pointer to list of JVM State objects
308 const TypePtr* _adr_type; // What type of memory does this node produce?
310 // Many calls take *all* of memory as input,
311 // but some produce a limited subset of that memory as output.
312 // The adr_type reports the call's behavior as a store, not a load.
314 virtual JVMState* jvms() const { return _jvms; }
315 void set_jvms(JVMState* s) {
316 *(JVMState**)&_jvms = s; // override const attribute in the accessor
317 }
318 OopMap *oop_map() const { return _oop_map; }
319 void set_oop_map(OopMap *om) { _oop_map = om; }
321 // Functionality from old debug nodes which has changed
322 Node *local(JVMState* jvms, uint idx) const {
323 assert(verify_jvms(jvms), "jvms must match");
324 return in(jvms->locoff() + idx);
325 }
326 Node *stack(JVMState* jvms, uint idx) const {
327 assert(verify_jvms(jvms), "jvms must match");
328 return in(jvms->stkoff() + idx);
329 }
330 Node *argument(JVMState* jvms, uint idx) const {
331 assert(verify_jvms(jvms), "jvms must match");
332 return in(jvms->argoff() + idx);
333 }
334 Node *monitor_box(JVMState* jvms, uint idx) const {
335 assert(verify_jvms(jvms), "jvms must match");
336 return in(jvms->monitor_box_offset(idx));
337 }
338 Node *monitor_obj(JVMState* jvms, uint idx) const {
339 assert(verify_jvms(jvms), "jvms must match");
340 return in(jvms->monitor_obj_offset(idx));
341 }
343 void set_local(JVMState* jvms, uint idx, Node *c);
345 void set_stack(JVMState* jvms, uint idx, Node *c) {
346 assert(verify_jvms(jvms), "jvms must match");
347 set_req(jvms->stkoff() + idx, c);
348 }
349 void set_argument(JVMState* jvms, uint idx, Node *c) {
350 assert(verify_jvms(jvms), "jvms must match");
351 set_req(jvms->argoff() + idx, c);
352 }
353 void ensure_stack(JVMState* jvms, uint stk_size) {
354 assert(verify_jvms(jvms), "jvms must match");
355 int grow_by = (int)stk_size - (int)jvms->stk_size();
356 if (grow_by > 0) grow_stack(jvms, grow_by);
357 }
358 void grow_stack(JVMState* jvms, uint grow_by);
359 // Handle monitor stack
360 void push_monitor( const FastLockNode *lock );
361 void pop_monitor ();
362 Node *peek_monitor_box() const;
363 Node *peek_monitor_obj() const;
365 // Access functions for the JVM
366 Node *control () const { return in(TypeFunc::Control ); }
367 Node *i_o () const { return in(TypeFunc::I_O ); }
368 Node *memory () const { return in(TypeFunc::Memory ); }
369 Node *returnadr() const { return in(TypeFunc::ReturnAdr); }
370 Node *frameptr () const { return in(TypeFunc::FramePtr ); }
372 void set_control ( Node *c ) { set_req(TypeFunc::Control,c); }
373 void set_i_o ( Node *c ) { set_req(TypeFunc::I_O ,c); }
374 void set_memory ( Node *c ) { set_req(TypeFunc::Memory ,c); }
376 MergeMemNode* merged_memory() const {
377 return in(TypeFunc::Memory)->as_MergeMem();
378 }
380 // The parser marks useless maps as dead when it's done with them:
381 bool is_killed() { return in(TypeFunc::Control) == NULL; }
383 // Exception states bubbling out of subgraphs such as inlined calls
384 // are recorded here. (There might be more than one, hence the "next".)
385 // This feature is used only for safepoints which serve as "maps"
386 // for JVM states during parsing, intrinsic expansion, etc.
387 SafePointNode* next_exception() const;
388 void set_next_exception(SafePointNode* n);
389 bool has_exceptions() const { return next_exception() != NULL; }
391 // Standard Node stuff
392 virtual int Opcode() const;
393 virtual bool pinned() const { return true; }
394 virtual const Type *Value( PhaseTransform *phase ) const;
395 virtual const Type *bottom_type() const { return Type::CONTROL; }
396 virtual const TypePtr *adr_type() const { return _adr_type; }
397 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
398 virtual Node *Identity( PhaseTransform *phase );
399 virtual uint ideal_reg() const { return 0; }
400 virtual const RegMask &in_RegMask(uint) const;
401 virtual const RegMask &out_RegMask() const;
402 virtual uint match_edge(uint idx) const;
404 static bool needs_polling_address_input();
406 #ifndef PRODUCT
407 virtual void dump_spec(outputStream *st) const;
408 #endif
409 };
411 //------------------------------SafePointScalarObjectNode----------------------
412 // A SafePointScalarObjectNode represents the state of a scalarized object
413 // at a safepoint.
415 class SafePointScalarObjectNode: public TypeNode {
416 uint _first_index; // First input edge index of a SafePoint node where
417 // states of the scalarized object fields are collected.
418 uint _n_fields; // Number of non-static fields of the scalarized object.
419 DEBUG_ONLY(AllocateNode* _alloc;)
420 public:
421 SafePointScalarObjectNode(const TypeOopPtr* tp,
422 #ifdef ASSERT
423 AllocateNode* alloc,
424 #endif
425 uint first_index, uint n_fields);
426 virtual int Opcode() const;
427 virtual uint ideal_reg() const;
428 virtual const RegMask &in_RegMask(uint) const;
429 virtual const RegMask &out_RegMask() const;
430 virtual uint match_edge(uint idx) const;
432 uint first_index() const { return _first_index; }
433 uint n_fields() const { return _n_fields; }
434 DEBUG_ONLY(AllocateNode* alloc() const { return _alloc; })
436 virtual uint size_of() const { return sizeof(*this); }
438 // Assumes that "this" is an argument to a safepoint node "s", and that
439 // "new_call" is being created to correspond to "s". But the difference
440 // between the start index of the jvmstates of "new_call" and "s" is
441 // "jvms_adj". Produce and return a SafePointScalarObjectNode that
442 // corresponds appropriately to "this" in "new_call". Assumes that
443 // "sosn_map" is a map, specific to the translation of "s" to "new_call",
444 // mapping old SafePointScalarObjectNodes to new, to avoid multiple copies.
445 SafePointScalarObjectNode* clone(int jvms_adj, Dict* sosn_map) const;
447 #ifndef PRODUCT
448 virtual void dump_spec(outputStream *st) const;
449 #endif
450 };
452 //------------------------------CallNode---------------------------------------
453 // Call nodes now subsume the function of debug nodes at callsites, so they
454 // contain the functionality of a full scope chain of debug nodes.
455 class CallNode : public SafePointNode {
456 public:
457 const TypeFunc *_tf; // Function type
458 address _entry_point; // Address of method being called
459 float _cnt; // Estimate of number of times called
461 CallNode(const TypeFunc* tf, address addr, const TypePtr* adr_type)
462 : SafePointNode(tf->domain()->cnt(), NULL, adr_type),
463 _tf(tf),
464 _entry_point(addr),
465 _cnt(COUNT_UNKNOWN)
466 {
467 init_class_id(Class_Call);
468 init_flags(Flag_is_Call);
469 }
471 const TypeFunc* tf() const { return _tf; }
472 const address entry_point() const { return _entry_point; }
473 const float cnt() const { return _cnt; }
475 void set_tf(const TypeFunc* tf) { _tf = tf; }
476 void set_entry_point(address p) { _entry_point = p; }
477 void set_cnt(float c) { _cnt = c; }
479 virtual const Type *bottom_type() const;
480 virtual const Type *Value( PhaseTransform *phase ) const;
481 virtual Node *Identity( PhaseTransform *phase ) { return this; }
482 virtual uint cmp( const Node &n ) const;
483 virtual uint size_of() const = 0;
484 virtual void calling_convention( BasicType* sig_bt, VMRegPair *parm_regs, uint argcnt ) const;
485 virtual Node *match( const ProjNode *proj, const Matcher *m );
486 virtual uint ideal_reg() const { return NotAMachineReg; }
487 // Are we guaranteed that this node is a safepoint? Not true for leaf calls and
488 // for some macro nodes whose expansion does not have a safepoint on the fast path.
489 virtual bool guaranteed_safepoint() { return true; }
490 // For macro nodes, the JVMState gets modified during expansion, so when cloning
491 // the node the JVMState must be cloned.
492 virtual void clone_jvms() { } // default is not to clone
494 // Returns true if the call may modify n
495 virtual bool may_modify(const TypePtr *addr_t, PhaseTransform *phase);
496 // Does this node have a use of n other than in debug information?
497 bool has_non_debug_use(Node *n);
498 // Returns the unique CheckCastPP of a call
499 // or result projection is there are several CheckCastPP
500 // or returns NULL if there is no one.
501 Node *result_cast();
503 virtual uint match_edge(uint idx) const;
505 #ifndef PRODUCT
506 virtual void dump_req() const;
507 virtual void dump_spec(outputStream *st) const;
508 #endif
509 };
511 //------------------------------CallJavaNode-----------------------------------
512 // Make a static or dynamic subroutine call node using Java calling
513 // convention. (The "Java" calling convention is the compiler's calling
514 // convention, as opposed to the interpreter's or that of native C.)
515 class CallJavaNode : public CallNode {
516 protected:
517 virtual uint cmp( const Node &n ) const;
518 virtual uint size_of() const; // Size is bigger
520 bool _optimized_virtual;
521 ciMethod* _method; // Method being direct called
522 public:
523 const int _bci; // Byte Code Index of call byte code
524 CallJavaNode(const TypeFunc* tf , address addr, ciMethod* method, int bci)
525 : CallNode(tf, addr, TypePtr::BOTTOM),
526 _method(method), _bci(bci), _optimized_virtual(false)
527 {
528 init_class_id(Class_CallJava);
529 }
531 virtual int Opcode() const;
532 ciMethod* method() const { return _method; }
533 void set_method(ciMethod *m) { _method = m; }
534 void set_optimized_virtual(bool f) { _optimized_virtual = f; }
535 bool is_optimized_virtual() const { return _optimized_virtual; }
537 #ifndef PRODUCT
538 virtual void dump_spec(outputStream *st) const;
539 #endif
540 };
542 //------------------------------CallStaticJavaNode-----------------------------
543 // Make a direct subroutine call using Java calling convention (for static
544 // calls and optimized virtual calls, plus calls to wrappers for run-time
545 // routines); generates static stub.
546 class CallStaticJavaNode : public CallJavaNode {
547 virtual uint cmp( const Node &n ) const;
548 virtual uint size_of() const; // Size is bigger
549 public:
550 CallStaticJavaNode(const TypeFunc* tf, address addr, ciMethod* method, int bci)
551 : CallJavaNode(tf, addr, method, bci), _name(NULL) {
552 init_class_id(Class_CallStaticJava);
553 }
554 CallStaticJavaNode(const TypeFunc* tf, address addr, const char* name, int bci,
555 const TypePtr* adr_type)
556 : CallJavaNode(tf, addr, NULL, bci), _name(name) {
557 init_class_id(Class_CallStaticJava);
558 // This node calls a runtime stub, which often has narrow memory effects.
559 _adr_type = adr_type;
560 }
561 const char *_name; // Runtime wrapper name
563 // If this is an uncommon trap, return the request code, else zero.
564 int uncommon_trap_request() const;
565 static int extract_uncommon_trap_request(const Node* call);
567 virtual int Opcode() const;
568 #ifndef PRODUCT
569 virtual void dump_spec(outputStream *st) const;
570 #endif
571 };
573 //------------------------------CallDynamicJavaNode----------------------------
574 // Make a dispatched call using Java calling convention.
575 class CallDynamicJavaNode : public CallJavaNode {
576 virtual uint cmp( const Node &n ) const;
577 virtual uint size_of() const; // Size is bigger
578 public:
579 CallDynamicJavaNode( const TypeFunc *tf , address addr, ciMethod* method, int vtable_index, int bci ) : CallJavaNode(tf,addr,method,bci), _vtable_index(vtable_index) {
580 init_class_id(Class_CallDynamicJava);
581 }
583 int _vtable_index;
584 virtual int Opcode() const;
585 #ifndef PRODUCT
586 virtual void dump_spec(outputStream *st) const;
587 #endif
588 };
590 //------------------------------CallRuntimeNode--------------------------------
591 // Make a direct subroutine call node into compiled C++ code.
592 class CallRuntimeNode : public CallNode {
593 virtual uint cmp( const Node &n ) const;
594 virtual uint size_of() const; // Size is bigger
595 public:
596 CallRuntimeNode(const TypeFunc* tf, address addr, const char* name,
597 const TypePtr* adr_type)
598 : CallNode(tf, addr, adr_type),
599 _name(name)
600 {
601 init_class_id(Class_CallRuntime);
602 }
604 const char *_name; // Printable name, if _method is NULL
605 virtual int Opcode() const;
606 virtual void calling_convention( BasicType* sig_bt, VMRegPair *parm_regs, uint argcnt ) const;
608 #ifndef PRODUCT
609 virtual void dump_spec(outputStream *st) const;
610 #endif
611 };
613 //------------------------------CallLeafNode-----------------------------------
614 // Make a direct subroutine call node into compiled C++ code, without
615 // safepoints
616 class CallLeafNode : public CallRuntimeNode {
617 public:
618 CallLeafNode(const TypeFunc* tf, address addr, const char* name,
619 const TypePtr* adr_type)
620 : CallRuntimeNode(tf, addr, name, adr_type)
621 {
622 init_class_id(Class_CallLeaf);
623 }
624 virtual int Opcode() const;
625 virtual bool guaranteed_safepoint() { return false; }
626 #ifndef PRODUCT
627 virtual void dump_spec(outputStream *st) const;
628 #endif
629 };
631 //------------------------------CallLeafNoFPNode-------------------------------
632 // CallLeafNode, not using floating point or using it in the same manner as
633 // the generated code
634 class CallLeafNoFPNode : public CallLeafNode {
635 public:
636 CallLeafNoFPNode(const TypeFunc* tf, address addr, const char* name,
637 const TypePtr* adr_type)
638 : CallLeafNode(tf, addr, name, adr_type)
639 {
640 }
641 virtual int Opcode() const;
642 };
645 //------------------------------Allocate---------------------------------------
646 // High-level memory allocation
647 //
648 // AllocateNode and AllocateArrayNode are subclasses of CallNode because they will
649 // get expanded into a code sequence containing a call. Unlike other CallNodes,
650 // they have 2 memory projections and 2 i_o projections (which are distinguished by
651 // the _is_io_use flag in the projection.) This is needed when expanding the node in
652 // order to differentiate the uses of the projection on the normal control path from
653 // those on the exception return path.
654 //
655 class AllocateNode : public CallNode {
656 public:
657 enum {
658 // Output:
659 RawAddress = TypeFunc::Parms, // the newly-allocated raw address
660 // Inputs:
661 AllocSize = TypeFunc::Parms, // size (in bytes) of the new object
662 KlassNode, // type (maybe dynamic) of the obj.
663 InitialTest, // slow-path test (may be constant)
664 ALength, // array length (or TOP if none)
665 ParmLimit
666 };
668 static const TypeFunc* alloc_type() {
669 const Type** fields = TypeTuple::fields(ParmLimit - TypeFunc::Parms);
670 fields[AllocSize] = TypeInt::POS;
671 fields[KlassNode] = TypeInstPtr::NOTNULL;
672 fields[InitialTest] = TypeInt::BOOL;
673 fields[ALength] = TypeInt::INT; // length (can be a bad length)
675 const TypeTuple *domain = TypeTuple::make(ParmLimit, fields);
677 // create result type (range)
678 fields = TypeTuple::fields(1);
679 fields[TypeFunc::Parms+0] = TypeRawPtr::NOTNULL; // Returned oop
681 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+1, fields);
683 return TypeFunc::make(domain, range);
684 }
686 bool _is_scalar_replaceable; // Result of Escape Analysis
688 virtual uint size_of() const; // Size is bigger
689 AllocateNode(Compile* C, const TypeFunc *atype, Node *ctrl, Node *mem, Node *abio,
690 Node *size, Node *klass_node, Node *initial_test);
691 // Expansion modifies the JVMState, so we need to clone it
692 virtual void clone_jvms() {
693 set_jvms(jvms()->clone_deep(Compile::current()));
694 }
695 virtual int Opcode() const;
696 virtual uint ideal_reg() const { return Op_RegP; }
697 virtual bool guaranteed_safepoint() { return false; }
699 // allocations do not modify their arguments
700 virtual bool may_modify(const TypePtr *addr_t, PhaseTransform *phase) { return false;}
702 // Pattern-match a possible usage of AllocateNode.
703 // Return null if no allocation is recognized.
704 // The operand is the pointer produced by the (possible) allocation.
705 // It must be a projection of the Allocate or its subsequent CastPP.
706 // (Note: This function is defined in file graphKit.cpp, near
707 // GraphKit::new_instance/new_array, whose output it recognizes.)
708 // The 'ptr' may not have an offset unless the 'offset' argument is given.
709 static AllocateNode* Ideal_allocation(Node* ptr, PhaseTransform* phase);
711 // Fancy version which uses AddPNode::Ideal_base_and_offset to strip
712 // an offset, which is reported back to the caller.
713 // (Note: AllocateNode::Ideal_allocation is defined in graphKit.cpp.)
714 static AllocateNode* Ideal_allocation(Node* ptr, PhaseTransform* phase,
715 intptr_t& offset);
717 // Dig the klass operand out of a (possible) allocation site.
718 static Node* Ideal_klass(Node* ptr, PhaseTransform* phase) {
719 AllocateNode* allo = Ideal_allocation(ptr, phase);
720 return (allo == NULL) ? NULL : allo->in(KlassNode);
721 }
723 // Conservatively small estimate of offset of first non-header byte.
724 int minimum_header_size() {
725 return is_AllocateArray() ? arrayOopDesc::base_offset_in_bytes(T_BYTE) :
726 instanceOopDesc::base_offset_in_bytes();
727 }
729 // Return the corresponding initialization barrier (or null if none).
730 // Walks out edges to find it...
731 // (Note: Both InitializeNode::allocation and AllocateNode::initialization
732 // are defined in graphKit.cpp, which sets up the bidirectional relation.)
733 InitializeNode* initialization();
735 // Convenience for initialization->maybe_set_complete(phase)
736 bool maybe_set_complete(PhaseGVN* phase);
737 };
739 //------------------------------AllocateArray---------------------------------
740 //
741 // High-level array allocation
742 //
743 class AllocateArrayNode : public AllocateNode {
744 public:
745 AllocateArrayNode(Compile* C, const TypeFunc *atype, Node *ctrl, Node *mem, Node *abio,
746 Node* size, Node* klass_node, Node* initial_test,
747 Node* count_val
748 )
749 : AllocateNode(C, atype, ctrl, mem, abio, size, klass_node,
750 initial_test)
751 {
752 init_class_id(Class_AllocateArray);
753 set_req(AllocateNode::ALength, count_val);
754 }
755 virtual int Opcode() const;
756 virtual uint size_of() const; // Size is bigger
758 // Pattern-match a possible usage of AllocateArrayNode.
759 // Return null if no allocation is recognized.
760 static AllocateArrayNode* Ideal_array_allocation(Node* ptr, PhaseTransform* phase) {
761 AllocateNode* allo = Ideal_allocation(ptr, phase);
762 return (allo == NULL || !allo->is_AllocateArray())
763 ? NULL : allo->as_AllocateArray();
764 }
766 // Dig the length operand out of a (possible) array allocation site.
767 static Node* Ideal_length(Node* ptr, PhaseTransform* phase) {
768 AllocateArrayNode* allo = Ideal_array_allocation(ptr, phase);
769 return (allo == NULL) ? NULL : allo->in(AllocateNode::ALength);
770 }
771 };
773 //------------------------------AbstractLockNode-----------------------------------
774 class AbstractLockNode: public CallNode {
775 private:
776 bool _eliminate; // indicates this lock can be safely eliminated
777 #ifndef PRODUCT
778 NamedCounter* _counter;
779 #endif
781 protected:
782 // helper functions for lock elimination
783 //
785 bool find_matching_unlock(const Node* ctrl, LockNode* lock,
786 GrowableArray<AbstractLockNode*> &lock_ops);
787 bool find_lock_and_unlock_through_if(Node* node, LockNode* lock,
788 GrowableArray<AbstractLockNode*> &lock_ops);
789 bool find_unlocks_for_region(const RegionNode* region, LockNode* lock,
790 GrowableArray<AbstractLockNode*> &lock_ops);
791 LockNode *find_matching_lock(UnlockNode* unlock);
794 public:
795 AbstractLockNode(const TypeFunc *tf)
796 : CallNode(tf, NULL, TypeRawPtr::BOTTOM),
797 _eliminate(false)
798 {
799 #ifndef PRODUCT
800 _counter = NULL;
801 #endif
802 }
803 virtual int Opcode() const = 0;
804 Node * obj_node() const {return in(TypeFunc::Parms + 0); }
805 Node * box_node() const {return in(TypeFunc::Parms + 1); }
806 Node * fastlock_node() const {return in(TypeFunc::Parms + 2); }
807 const Type *sub(const Type *t1, const Type *t2) const { return TypeInt::CC;}
809 virtual uint size_of() const { return sizeof(*this); }
811 bool is_eliminated() {return _eliminate; }
812 // mark node as eliminated and update the counter if there is one
813 void set_eliminated();
815 // locking does not modify its arguments
816 virtual bool may_modify(const TypePtr *addr_t, PhaseTransform *phase){ return false;}
818 #ifndef PRODUCT
819 void create_lock_counter(JVMState* s);
820 NamedCounter* counter() const { return _counter; }
821 #endif
822 };
824 //------------------------------Lock---------------------------------------
825 // High-level lock operation
826 //
827 // This is a subclass of CallNode because it is a macro node which gets expanded
828 // into a code sequence containing a call. This node takes 3 "parameters":
829 // 0 - object to lock
830 // 1 - a BoxLockNode
831 // 2 - a FastLockNode
832 //
833 class LockNode : public AbstractLockNode {
834 public:
836 static const TypeFunc *lock_type() {
837 // create input type (domain)
838 const Type **fields = TypeTuple::fields(3);
839 fields[TypeFunc::Parms+0] = TypeInstPtr::NOTNULL; // Object to be Locked
840 fields[TypeFunc::Parms+1] = TypeRawPtr::BOTTOM; // Address of stack location for lock
841 fields[TypeFunc::Parms+2] = TypeInt::BOOL; // FastLock
842 const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+3,fields);
844 // create result type (range)
845 fields = TypeTuple::fields(0);
847 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+0,fields);
849 return TypeFunc::make(domain,range);
850 }
852 virtual int Opcode() const;
853 virtual uint size_of() const; // Size is bigger
854 LockNode(Compile* C, const TypeFunc *tf) : AbstractLockNode( tf ) {
855 init_class_id(Class_Lock);
856 init_flags(Flag_is_macro);
857 C->add_macro_node(this);
858 }
859 virtual bool guaranteed_safepoint() { return false; }
861 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
862 // Expansion modifies the JVMState, so we need to clone it
863 virtual void clone_jvms() {
864 set_jvms(jvms()->clone_deep(Compile::current()));
865 }
866 };
868 //------------------------------Unlock---------------------------------------
869 // High-level unlock operation
870 class UnlockNode : public AbstractLockNode {
871 public:
872 virtual int Opcode() const;
873 virtual uint size_of() const; // Size is bigger
874 UnlockNode(Compile* C, const TypeFunc *tf) : AbstractLockNode( tf ) {
875 init_class_id(Class_Unlock);
876 init_flags(Flag_is_macro);
877 C->add_macro_node(this);
878 }
879 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
880 // unlock is never a safepoint
881 virtual bool guaranteed_safepoint() { return false; }
882 };