1 /* 2 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #ifndef SHARE_VM_OPTO_CALLNODE_HPP 26 #define SHARE_VM_OPTO_CALLNODE_HPP 27 28 #include "opto/connode.hpp" 29 #include "opto/mulnode.hpp" 30 #include "opto/multnode.hpp" 31 #include "opto/opcodes.hpp" 32 #include "opto/phaseX.hpp" 33 #include "opto/type.hpp" 34 35 // Portions of code courtesy of Clifford Click 36 37 // Optimization - Graph Style 38 39 class Chaitin; 40 class NamedCounter; 41 class MultiNode; 42 class SafePointNode; 43 class CallNode; 44 class CallJavaNode; 45 class CallStaticJavaNode; 46 class CallDynamicJavaNode; 47 class CallRuntimeNode; 48 class CallLeafNode; 49 class CallLeafNoFPNode; 50 class AllocateNode; 51 class AllocateArrayNode; 52 class BoxLockNode; 53 class LockNode; 54 class UnlockNode; 55 class JVMState; 56 class OopMap; 57 class State; 58 class StartNode; 59 class MachCallNode; 60 class FastLockNode; 61 62 //------------------------------StartNode-------------------------------------- 63 // The method start node 64 class StartNode : public MultiNode { 65 virtual uint cmp( const Node &n ) const; 66 virtual uint size_of() const; // Size is bigger 67 public: 68 const TypeTuple *_domain; 69 StartNode( Node *root, const TypeTuple *domain ) : MultiNode(2), _domain(domain) { 70 init_class_id(Class_Start); 71 init_req(0,this); 72 init_req(1,root); 73 } 74 virtual int Opcode() const; 75 virtual bool pinned() const { return true; }; 76 virtual const Type *bottom_type() const; 77 virtual const TypePtr *adr_type() const { return TypePtr::BOTTOM; } 78 virtual const Type *Value( PhaseTransform *phase ) const; 79 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); 80 virtual void calling_convention( BasicType* sig_bt, VMRegPair *parm_reg, uint length ) const; 81 virtual const RegMask &in_RegMask(uint) const; 82 virtual Node *match( const ProjNode *proj, const Matcher *m ); 83 virtual uint ideal_reg() const { return 0; } 84 #ifndef PRODUCT 85 virtual void dump_spec(outputStream *st) const; 86 #endif 87 }; 88 89 //------------------------------StartOSRNode----------------------------------- 90 // The method start node for on stack replacement code 91 class StartOSRNode : public StartNode { 92 public: 93 StartOSRNode( Node *root, const TypeTuple *domain ) : StartNode(root, domain) {} 94 virtual int Opcode() const; 95 static const TypeTuple *osr_domain(); 96 }; 97 98 99 //------------------------------ParmNode--------------------------------------- 100 // Incoming parameters 101 class ParmNode : public ProjNode { 102 static const char * const names[TypeFunc::Parms+1]; 103 public: 104 ParmNode( StartNode *src, uint con ) : ProjNode(src,con) { 105 init_class_id(Class_Parm); 106 } 107 virtual int Opcode() const; 108 virtual bool is_CFG() const { return (_con == TypeFunc::Control); } 109 virtual uint ideal_reg() const; 110 #ifndef PRODUCT 111 virtual void dump_spec(outputStream *st) const; 112 #endif 113 }; 114 115 116 //------------------------------ReturnNode------------------------------------- 117 // Return from subroutine node 118 class ReturnNode : public Node { 119 public: 120 ReturnNode( uint edges, Node *cntrl, Node *i_o, Node *memory, Node *retadr, Node *frameptr ); 121 virtual int Opcode() const; 122 virtual bool is_CFG() const { return true; } 123 virtual uint hash() const { return NO_HASH; } // CFG nodes do not hash 124 virtual bool depends_only_on_test() const { return false; } 125 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); 126 virtual const Type *Value( PhaseTransform *phase ) const; 127 virtual uint ideal_reg() const { return NotAMachineReg; } 128 virtual uint match_edge(uint idx) const; 129 #ifndef PRODUCT 130 virtual void dump_req(outputStream *st = tty) const; 131 #endif 132 }; 133 134 135 //------------------------------RethrowNode------------------------------------ 136 // Rethrow of exception at call site. Ends a procedure before rethrowing; 137 // ends the current basic block like a ReturnNode. Restores registers and 138 // unwinds stack. Rethrow happens in the caller's method. 139 class RethrowNode : public Node { 140 public: 141 RethrowNode( Node *cntrl, Node *i_o, Node *memory, Node *frameptr, Node *ret_adr, Node *exception ); 142 virtual int Opcode() const; 143 virtual bool is_CFG() const { return true; } 144 virtual uint hash() const { return NO_HASH; } // CFG nodes do not hash 145 virtual bool depends_only_on_test() const { return false; } 146 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); 147 virtual const Type *Value( PhaseTransform *phase ) const; 148 virtual uint match_edge(uint idx) const; 149 virtual uint ideal_reg() const { return NotAMachineReg; } 150 #ifndef PRODUCT 151 virtual void dump_req(outputStream *st = tty) const; 152 #endif 153 }; 154 155 156 //------------------------------TailCallNode----------------------------------- 157 // Pop stack frame and jump indirect 158 class TailCallNode : public ReturnNode { 159 public: 160 TailCallNode( Node *cntrl, Node *i_o, Node *memory, Node *frameptr, Node *retadr, Node *target, Node *moop ) 161 : ReturnNode( TypeFunc::Parms+2, cntrl, i_o, memory, frameptr, retadr ) { 162 init_req(TypeFunc::Parms, target); 163 init_req(TypeFunc::Parms+1, moop); 164 } 165 166 virtual int Opcode() const; 167 virtual uint match_edge(uint idx) const; 168 }; 169 170 //------------------------------TailJumpNode----------------------------------- 171 // Pop stack frame and jump indirect 172 class TailJumpNode : public ReturnNode { 173 public: 174 TailJumpNode( Node *cntrl, Node *i_o, Node *memory, Node *frameptr, Node *target, Node *ex_oop) 175 : ReturnNode(TypeFunc::Parms+2, cntrl, i_o, memory, frameptr, Compile::current()->top()) { 176 init_req(TypeFunc::Parms, target); 177 init_req(TypeFunc::Parms+1, ex_oop); 178 } 179 180 virtual int Opcode() const; 181 virtual uint match_edge(uint idx) const; 182 }; 183 184 //-------------------------------JVMState------------------------------------- 185 // A linked list of JVMState nodes captures the whole interpreter state, 186 // plus GC roots, for all active calls at some call site in this compilation 187 // unit. (If there is no inlining, then the list has exactly one link.) 188 // This provides a way to map the optimized program back into the interpreter, 189 // or to let the GC mark the stack. 190 class JVMState : public ResourceObj { 191 friend class VMStructs; 192 public: 193 typedef enum { 194 Reexecute_Undefined = -1, // not defined -- will be translated into false later 195 Reexecute_False = 0, // false -- do not reexecute 196 Reexecute_True = 1 // true -- reexecute the bytecode 197 } ReexecuteState; //Reexecute State 198 199 private: 200 JVMState* _caller; // List pointer for forming scope chains 201 uint _depth; // One more than caller depth, or one. 202 uint _locoff; // Offset to locals in input edge mapping 203 uint _stkoff; // Offset to stack in input edge mapping 204 uint _monoff; // Offset to monitors in input edge mapping 205 uint _scloff; // Offset to fields of scalar objs in input edge mapping 206 uint _endoff; // Offset to end of input edge mapping 207 uint _sp; // Jave Expression Stack Pointer for this state 208 int _bci; // Byte Code Index of this JVM point 209 ReexecuteState _reexecute; // Whether this bytecode need to be re-executed 210 ciMethod* _method; // Method Pointer 211 SafePointNode* _map; // Map node associated with this scope 212 public: 213 friend class Compile; 214 friend class PreserveReexecuteState; 215 216 // Because JVMState objects live over the entire lifetime of the 217 // Compile object, they are allocated into the comp_arena, which 218 // does not get resource marked or reset during the compile process 219 void *operator new( size_t x, Compile* C ) { return C->comp_arena()->Amalloc(x); } 220 void operator delete( void * ) { } // fast deallocation 221 222 // Create a new JVMState, ready for abstract interpretation. 223 JVMState(ciMethod* method, JVMState* caller); 224 JVMState(int stack_size); // root state; has a null method 225 226 // Access functions for the JVM 227 // ... --|--- loc ---|--- stk ---|--- arg ---|--- mon ---|--- scl ---| 228 // \ locoff \ stkoff \ argoff \ monoff \ scloff \ endoff 229 uint locoff() const { return _locoff; } 230 uint stkoff() const { return _stkoff; } 231 uint argoff() const { return _stkoff + _sp; } 232 uint monoff() const { return _monoff; } 233 uint scloff() const { return _scloff; } 234 uint endoff() const { return _endoff; } 235 uint oopoff() const { return debug_end(); } 236 237 int loc_size() const { return stkoff() - locoff(); } 238 int stk_size() const { return monoff() - stkoff(); } 239 int mon_size() const { return scloff() - monoff(); } 240 int scl_size() const { return endoff() - scloff(); } 241 242 bool is_loc(uint i) const { return locoff() <= i && i < stkoff(); } 243 bool is_stk(uint i) const { return stkoff() <= i && i < monoff(); } 244 bool is_mon(uint i) const { return monoff() <= i && i < scloff(); } 245 bool is_scl(uint i) const { return scloff() <= i && i < endoff(); } 246 247 uint sp() const { return _sp; } 248 int bci() const { return _bci; } 249 bool should_reexecute() const { return _reexecute==Reexecute_True; } 250 bool is_reexecute_undefined() const { return _reexecute==Reexecute_Undefined; } 251 bool has_method() const { return _method != NULL; } 252 ciMethod* method() const { assert(has_method(), ""); return _method; } 253 JVMState* caller() const { return _caller; } 254 SafePointNode* map() const { return _map; } 255 uint depth() const { return _depth; } 256 uint debug_start() const; // returns locoff of root caller 257 uint debug_end() const; // returns endoff of self 258 uint debug_size() const { 259 return loc_size() + sp() + mon_size() + scl_size(); 260 } 261 uint debug_depth() const; // returns sum of debug_size values at all depths 262 263 // Returns the JVM state at the desired depth (1 == root). 264 JVMState* of_depth(int d) const; 265 266 // Tells if two JVM states have the same call chain (depth, methods, & bcis). 267 bool same_calls_as(const JVMState* that) const; 268 269 // Monitors (monitors are stored as (boxNode, objNode) pairs 270 enum { logMonitorEdges = 1 }; 271 int nof_monitors() const { return mon_size() >> logMonitorEdges; } 272 int monitor_depth() const { return nof_monitors() + (caller() ? caller()->monitor_depth() : 0); } 273 int monitor_box_offset(int idx) const { return monoff() + (idx << logMonitorEdges) + 0; } 274 int monitor_obj_offset(int idx) const { return monoff() + (idx << logMonitorEdges) + 1; } 275 bool is_monitor_box(uint off) const { 276 assert(is_mon(off), "should be called only for monitor edge"); 277 return (0 == bitfield(off - monoff(), 0, logMonitorEdges)); 278 } 279 bool is_monitor_use(uint off) const { return (is_mon(off) 280 && is_monitor_box(off)) 281 || (caller() && caller()->is_monitor_use(off)); } 282 283 // Initialization functions for the JVM 284 void set_locoff(uint off) { _locoff = off; } 285 void set_stkoff(uint off) { _stkoff = off; } 286 void set_monoff(uint off) { _monoff = off; } 287 void set_scloff(uint off) { _scloff = off; } 288 void set_endoff(uint off) { _endoff = off; } 289 void set_offsets(uint off) { 290 _locoff = _stkoff = _monoff = _scloff = _endoff = off; 291 } 292 void set_map(SafePointNode *map) { _map = map; } 293 void set_sp(uint sp) { _sp = sp; } 294 // _reexecute is initialized to "undefined" for a new bci 295 void set_bci(int bci) {if(_bci != bci)_reexecute=Reexecute_Undefined; _bci = bci; } 296 void set_should_reexecute(bool reexec) {_reexecute = reexec ? Reexecute_True : Reexecute_False;} 297 298 // Miscellaneous utility functions 299 JVMState* clone_deep(Compile* C) const; // recursively clones caller chain 300 JVMState* clone_shallow(Compile* C) const; // retains uncloned caller 301 void set_map_deep(SafePointNode *map);// reset map for all callers 302 303 #ifndef PRODUCT 304 void format(PhaseRegAlloc *regalloc, const Node *n, outputStream* st) const; 305 void dump_spec(outputStream *st) const; 306 void dump_on(outputStream* st) const; 307 void dump() const { 308 dump_on(tty); 309 } 310 #endif 311 }; 312 313 //------------------------------SafePointNode---------------------------------- 314 // A SafePointNode is a subclass of a MultiNode for convenience (and 315 // potential code sharing) only - conceptually it is independent of 316 // the Node semantics. 317 class SafePointNode : public MultiNode { 318 virtual uint cmp( const Node &n ) const; 319 virtual uint size_of() const; // Size is bigger 320 321 public: 322 SafePointNode(uint edges, JVMState* jvms, 323 // A plain safepoint advertises no memory effects (NULL): 324 const TypePtr* adr_type = NULL) 325 : MultiNode( edges ), 326 _jvms(jvms), 327 _oop_map(NULL), 328 _adr_type(adr_type) 329 { 330 init_class_id(Class_SafePoint); 331 } 332 333 OopMap* _oop_map; // Array of OopMap info (8-bit char) for GC 334 JVMState* const _jvms; // Pointer to list of JVM State objects 335 const TypePtr* _adr_type; // What type of memory does this node produce? 336 337 // Many calls take *all* of memory as input, 338 // but some produce a limited subset of that memory as output. 339 // The adr_type reports the call's behavior as a store, not a load. 340 341 virtual JVMState* jvms() const { return _jvms; } 342 void set_jvms(JVMState* s) { 343 *(JVMState**)&_jvms = s; // override const attribute in the accessor 344 } 345 OopMap *oop_map() const { return _oop_map; } 346 void set_oop_map(OopMap *om) { _oop_map = om; } 347 348 private: 349 void verify_input(JVMState* jvms, uint idx) const { 350 assert(verify_jvms(jvms), "jvms must match"); 351 Node* n = in(idx); 352 assert((!n->bottom_type()->isa_long() && !n->bottom_type()->isa_double()) || 353 in(idx + 1)->is_top(), "2nd half of long/double"); 354 } 355 356 public: 357 // Functionality from old debug nodes which has changed 358 Node *local(JVMState* jvms, uint idx) const { 359 verify_input(jvms, jvms->locoff() + idx); 360 return in(jvms->locoff() + idx); 361 } 362 Node *stack(JVMState* jvms, uint idx) const { 363 verify_input(jvms, jvms->stkoff() + idx); 364 return in(jvms->stkoff() + idx); 365 } 366 Node *argument(JVMState* jvms, uint idx) const { 367 verify_input(jvms, jvms->argoff() + idx); 368 return in(jvms->argoff() + idx); 369 } 370 Node *monitor_box(JVMState* jvms, uint idx) const { 371 assert(verify_jvms(jvms), "jvms must match"); 372 return in(jvms->monitor_box_offset(idx)); 373 } 374 Node *monitor_obj(JVMState* jvms, uint idx) const { 375 assert(verify_jvms(jvms), "jvms must match"); 376 return in(jvms->monitor_obj_offset(idx)); 377 } 378 379 void set_local(JVMState* jvms, uint idx, Node *c); 380 381 void set_stack(JVMState* jvms, uint idx, Node *c) { 382 assert(verify_jvms(jvms), "jvms must match"); 383 set_req(jvms->stkoff() + idx, c); 384 } 385 void set_argument(JVMState* jvms, uint idx, Node *c) { 386 assert(verify_jvms(jvms), "jvms must match"); 387 set_req(jvms->argoff() + idx, c); 388 } 389 void ensure_stack(JVMState* jvms, uint stk_size) { 390 assert(verify_jvms(jvms), "jvms must match"); 391 int grow_by = (int)stk_size - (int)jvms->stk_size(); 392 if (grow_by > 0) grow_stack(jvms, grow_by); 393 } 394 void grow_stack(JVMState* jvms, uint grow_by); 395 // Handle monitor stack 396 void push_monitor( const FastLockNode *lock ); 397 void pop_monitor (); 398 Node *peek_monitor_box() const; 399 Node *peek_monitor_obj() const; 400 401 // Access functions for the JVM 402 Node *control () const { return in(TypeFunc::Control ); } 403 Node *i_o () const { return in(TypeFunc::I_O ); } 404 Node *memory () const { return in(TypeFunc::Memory ); } 405 Node *returnadr() const { return in(TypeFunc::ReturnAdr); } 406 Node *frameptr () const { return in(TypeFunc::FramePtr ); } 407 408 void set_control ( Node *c ) { set_req(TypeFunc::Control,c); } 409 void set_i_o ( Node *c ) { set_req(TypeFunc::I_O ,c); } 410 void set_memory ( Node *c ) { set_req(TypeFunc::Memory ,c); } 411 412 MergeMemNode* merged_memory() const { 413 return in(TypeFunc::Memory)->as_MergeMem(); 414 } 415 416 // The parser marks useless maps as dead when it's done with them: 417 bool is_killed() { return in(TypeFunc::Control) == NULL; } 418 419 // Exception states bubbling out of subgraphs such as inlined calls 420 // are recorded here. (There might be more than one, hence the "next".) 421 // This feature is used only for safepoints which serve as "maps" 422 // for JVM states during parsing, intrinsic expansion, etc. 423 SafePointNode* next_exception() const; 424 void set_next_exception(SafePointNode* n); 425 bool has_exceptions() const { return next_exception() != NULL; } 426 427 // Standard Node stuff 428 virtual int Opcode() const; 429 virtual bool pinned() const { return true; } 430 virtual const Type *Value( PhaseTransform *phase ) const; 431 virtual const Type *bottom_type() const { return Type::CONTROL; } 432 virtual const TypePtr *adr_type() const { return _adr_type; } 433 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); 434 virtual Node *Identity( PhaseTransform *phase ); 435 virtual uint ideal_reg() const { return 0; } 436 virtual const RegMask &in_RegMask(uint) const; 437 virtual const RegMask &out_RegMask() const; 438 virtual uint match_edge(uint idx) const; 439 440 static bool needs_polling_address_input(); 441 442 #ifndef PRODUCT 443 virtual void dump_spec(outputStream *st) const; 444 #endif 445 }; 446 447 //------------------------------SafePointScalarObjectNode---------------------- 448 // A SafePointScalarObjectNode represents the state of a scalarized object 449 // at a safepoint. 450 451 class SafePointScalarObjectNode: public TypeNode { 452 uint _first_index; // First input edge relative index of a SafePoint node where 453 // states of the scalarized object fields are collected. 454 // It is relative to the last (youngest) jvms->_scloff. 455 uint _n_fields; // Number of non-static fields of the scalarized object. 456 DEBUG_ONLY(AllocateNode* _alloc;) 457 458 virtual uint hash() const ; // { return NO_HASH; } 459 virtual uint cmp( const Node &n ) const; 460 461 uint first_index() const { return _first_index; } 462 463 public: 464 SafePointScalarObjectNode(const TypeOopPtr* tp, 465 #ifdef ASSERT 466 AllocateNode* alloc, 467 #endif 468 uint first_index, uint n_fields); 469 virtual int Opcode() const; 470 virtual uint ideal_reg() const; 471 virtual const RegMask &in_RegMask(uint) const; 472 virtual const RegMask &out_RegMask() const; 473 virtual uint match_edge(uint idx) const; 474 475 uint first_index(JVMState* jvms) const { 476 assert(jvms != NULL, "missed JVMS"); 477 return jvms->scloff() + _first_index; 478 } 479 uint n_fields() const { return _n_fields; } 480 481 #ifdef ASSERT 482 AllocateNode* alloc() const { return _alloc; } 483 #endif 484 485 virtual uint size_of() const { return sizeof(*this); } 486 487 // Assumes that "this" is an argument to a safepoint node "s", and that 488 // "new_call" is being created to correspond to "s". But the difference 489 // between the start index of the jvmstates of "new_call" and "s" is 490 // "jvms_adj". Produce and return a SafePointScalarObjectNode that 491 // corresponds appropriately to "this" in "new_call". Assumes that 492 // "sosn_map" is a map, specific to the translation of "s" to "new_call", 493 // mapping old SafePointScalarObjectNodes to new, to avoid multiple copies. 494 SafePointScalarObjectNode* clone(Dict* sosn_map) const; 495 496 #ifndef PRODUCT 497 virtual void dump_spec(outputStream *st) const; 498 #endif 499 }; 500 501 502 // Simple container for the outgoing projections of a call. Useful 503 // for serious surgery on calls. 504 class CallProjections : public StackObj { 505 public: 506 Node* fallthrough_proj; 507 Node* fallthrough_catchproj; 508 Node* fallthrough_memproj; 509 Node* fallthrough_ioproj; 510 Node* catchall_catchproj; 511 Node* catchall_memproj; 512 Node* catchall_ioproj; 513 Node* resproj; 514 Node* exobj; 515 }; 516 517 class CallGenerator; 518 519 //------------------------------CallNode--------------------------------------- 520 // Call nodes now subsume the function of debug nodes at callsites, so they 521 // contain the functionality of a full scope chain of debug nodes. 522 class CallNode : public SafePointNode { 523 friend class VMStructs; 524 public: 525 const TypeFunc *_tf; // Function type 526 address _entry_point; // Address of method being called 527 float _cnt; // Estimate of number of times called 528 CallGenerator* _generator; // corresponding CallGenerator for some late inline calls 529 530 CallNode(const TypeFunc* tf, address addr, const TypePtr* adr_type) 531 : SafePointNode(tf->domain()->cnt(), NULL, adr_type), 532 _tf(tf), 533 _entry_point(addr), 534 _cnt(COUNT_UNKNOWN), 535 _generator(NULL) 536 { 537 init_class_id(Class_Call); 538 } 539 540 const TypeFunc* tf() const { return _tf; } 541 const address entry_point() const { return _entry_point; } 542 const float cnt() const { return _cnt; } 543 CallGenerator* generator() const { return _generator; } 544 545 void set_tf(const TypeFunc* tf) { _tf = tf; } 546 void set_entry_point(address p) { _entry_point = p; } 547 void set_cnt(float c) { _cnt = c; } 548 void set_generator(CallGenerator* cg) { _generator = cg; } 549 550 virtual const Type *bottom_type() const; 551 virtual const Type *Value( PhaseTransform *phase ) const; 552 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); 553 virtual Node *Identity( PhaseTransform *phase ) { return this; } 554 virtual uint cmp( const Node &n ) const; 555 virtual uint size_of() const = 0; 556 virtual void calling_convention( BasicType* sig_bt, VMRegPair *parm_regs, uint argcnt ) const; 557 virtual Node *match( const ProjNode *proj, const Matcher *m ); 558 virtual uint ideal_reg() const { return NotAMachineReg; } 559 // Are we guaranteed that this node is a safepoint? Not true for leaf calls and 560 // for some macro nodes whose expansion does not have a safepoint on the fast path. 561 virtual bool guaranteed_safepoint() { return true; } 562 // For macro nodes, the JVMState gets modified during expansion, so when cloning 563 // the node the JVMState must be cloned. 564 virtual void clone_jvms(Compile* C) { } // default is not to clone 565 566 // Returns true if the call may modify n 567 virtual bool may_modify(const TypeOopPtr *t_oop, PhaseTransform *phase); 568 // Does this node have a use of n other than in debug information? 569 bool has_non_debug_use(Node *n); 570 // Returns the unique CheckCastPP of a call 571 // or result projection is there are several CheckCastPP 572 // or returns NULL if there is no one. 573 Node *result_cast(); 574 // Does this node returns pointer? 575 bool returns_pointer() const { 576 const TypeTuple *r = tf()->range(); 577 return (r->cnt() > TypeFunc::Parms && 578 r->field_at(TypeFunc::Parms)->isa_ptr()); 579 } 580 581 // Collect all the interesting edges from a call for use in 582 // replacing the call by something else. Used by macro expansion 583 // and the late inlining support. 584 void extract_projections(CallProjections* projs, bool separate_io_proj); 585 586 virtual uint match_edge(uint idx) const; 587 588 #ifndef PRODUCT 589 virtual void dump_req(outputStream *st = tty) const; 590 virtual void dump_spec(outputStream *st) const; 591 #endif 592 }; 593 594 595 //------------------------------CallJavaNode----------------------------------- 596 // Make a static or dynamic subroutine call node using Java calling 597 // convention. (The "Java" calling convention is the compiler's calling 598 // convention, as opposed to the interpreter's or that of native C.) 599 class CallJavaNode : public CallNode { 600 friend class VMStructs; 601 protected: 602 virtual uint cmp( const Node &n ) const; 603 virtual uint size_of() const; // Size is bigger 604 605 bool _optimized_virtual; 606 bool _method_handle_invoke; 607 ciMethod* _method; // Method being direct called 608 public: 609 const int _bci; // Byte Code Index of call byte code 610 CallJavaNode(const TypeFunc* tf , address addr, ciMethod* method, int bci) 611 : CallNode(tf, addr, TypePtr::BOTTOM), 612 _method(method), _bci(bci), 613 _optimized_virtual(false), 614 _method_handle_invoke(false) 615 { 616 init_class_id(Class_CallJava); 617 } 618 619 virtual int Opcode() const; 620 ciMethod* method() const { return _method; } 621 void set_method(ciMethod *m) { _method = m; } 622 void set_optimized_virtual(bool f) { _optimized_virtual = f; } 623 bool is_optimized_virtual() const { return _optimized_virtual; } 624 void set_method_handle_invoke(bool f) { _method_handle_invoke = f; } 625 bool is_method_handle_invoke() const { return _method_handle_invoke; } 626 627 #ifndef PRODUCT 628 virtual void dump_spec(outputStream *st) const; 629 #endif 630 }; 631 632 //------------------------------CallStaticJavaNode----------------------------- 633 // Make a direct subroutine call using Java calling convention (for static 634 // calls and optimized virtual calls, plus calls to wrappers for run-time 635 // routines); generates static stub. 636 class CallStaticJavaNode : public CallJavaNode { 637 virtual uint cmp( const Node &n ) const; 638 virtual uint size_of() const; // Size is bigger 639 public: 640 CallStaticJavaNode(Compile* C, const TypeFunc* tf, address addr, ciMethod* method, int bci) 641 : CallJavaNode(tf, addr, method, bci), _name(NULL) { 642 init_class_id(Class_CallStaticJava); 643 if (C->eliminate_boxing() && (method != NULL) && method->is_boxing_method()) { 644 init_flags(Flag_is_macro); 645 C->add_macro_node(this); 646 } 647 _is_scalar_replaceable = false; 648 _is_non_escaping = false; 649 } 650 CallStaticJavaNode(const TypeFunc* tf, address addr, const char* name, int bci, 651 const TypePtr* adr_type) 652 : CallJavaNode(tf, addr, NULL, bci), _name(name) { 653 init_class_id(Class_CallStaticJava); 654 // This node calls a runtime stub, which often has narrow memory effects. 655 _adr_type = adr_type; 656 _is_scalar_replaceable = false; 657 _is_non_escaping = false; 658 } 659 const char *_name; // Runtime wrapper name 660 661 // Result of Escape Analysis 662 bool _is_scalar_replaceable; 663 bool _is_non_escaping; 664 665 // If this is an uncommon trap, return the request code, else zero. 666 int uncommon_trap_request() const; 667 static int extract_uncommon_trap_request(const Node* call); 668 669 bool is_boxing_method() const { 670 return is_macro() && (method() != NULL) && method()->is_boxing_method(); 671 } 672 // Later inlining modifies the JVMState, so we need to clone it 673 // when the call node is cloned (because it is macro node). 674 virtual void clone_jvms(Compile* C) { 675 if ((jvms() != NULL) && is_boxing_method()) { 676 set_jvms(jvms()->clone_deep(C)); 677 jvms()->set_map_deep(this); 678 } 679 } 680 681 virtual int Opcode() const; 682 #ifndef PRODUCT 683 virtual void dump_spec(outputStream *st) const; 684 #endif 685 }; 686 687 //------------------------------CallDynamicJavaNode---------------------------- 688 // Make a dispatched call using Java calling convention. 689 class CallDynamicJavaNode : public CallJavaNode { 690 virtual uint cmp( const Node &n ) const; 691 virtual uint size_of() const; // Size is bigger 692 public: 693 CallDynamicJavaNode( const TypeFunc *tf , address addr, ciMethod* method, int vtable_index, int bci ) : CallJavaNode(tf,addr,method,bci), _vtable_index(vtable_index) { 694 init_class_id(Class_CallDynamicJava); 695 } 696 697 int _vtable_index; 698 virtual int Opcode() const; 699 #ifndef PRODUCT 700 virtual void dump_spec(outputStream *st) const; 701 #endif 702 }; 703 704 //------------------------------CallRuntimeNode-------------------------------- 705 // Make a direct subroutine call node into compiled C++ code. 706 class CallRuntimeNode : public CallNode { 707 virtual uint cmp( const Node &n ) const; 708 virtual uint size_of() const; // Size is bigger 709 public: 710 CallRuntimeNode(const TypeFunc* tf, address addr, const char* name, 711 const TypePtr* adr_type) 712 : CallNode(tf, addr, adr_type), 713 _name(name) 714 { 715 init_class_id(Class_CallRuntime); 716 } 717 718 const char *_name; // Printable name, if _method is NULL 719 virtual int Opcode() const; 720 virtual void calling_convention( BasicType* sig_bt, VMRegPair *parm_regs, uint argcnt ) const; 721 722 #ifndef PRODUCT 723 virtual void dump_spec(outputStream *st) const; 724 #endif 725 }; 726 727 //------------------------------CallLeafNode----------------------------------- 728 // Make a direct subroutine call node into compiled C++ code, without 729 // safepoints 730 class CallLeafNode : public CallRuntimeNode { 731 public: 732 CallLeafNode(const TypeFunc* tf, address addr, const char* name, 733 const TypePtr* adr_type) 734 : CallRuntimeNode(tf, addr, name, adr_type) 735 { 736 init_class_id(Class_CallLeaf); 737 } 738 virtual int Opcode() const; 739 virtual bool guaranteed_safepoint() { return false; } 740 #ifndef PRODUCT 741 virtual void dump_spec(outputStream *st) const; 742 #endif 743 }; 744 745 //------------------------------CallLeafNoFPNode------------------------------- 746 // CallLeafNode, not using floating point or using it in the same manner as 747 // the generated code 748 class CallLeafNoFPNode : public CallLeafNode { 749 public: 750 CallLeafNoFPNode(const TypeFunc* tf, address addr, const char* name, 751 const TypePtr* adr_type) 752 : CallLeafNode(tf, addr, name, adr_type) 753 { 754 } 755 virtual int Opcode() const; 756 }; 757 758 759 //------------------------------Allocate--------------------------------------- 760 // High-level memory allocation 761 // 762 // AllocateNode and AllocateArrayNode are subclasses of CallNode because they will 763 // get expanded into a code sequence containing a call. Unlike other CallNodes, 764 // they have 2 memory projections and 2 i_o projections (which are distinguished by 765 // the _is_io_use flag in the projection.) This is needed when expanding the node in 766 // order to differentiate the uses of the projection on the normal control path from 767 // those on the exception return path. 768 // 769 class AllocateNode : public CallNode { 770 public: 771 enum { 772 // Output: 773 RawAddress = TypeFunc::Parms, // the newly-allocated raw address 774 // Inputs: 775 AllocSize = TypeFunc::Parms, // size (in bytes) of the new object 776 KlassNode, // type (maybe dynamic) of the obj. 777 InitialTest, // slow-path test (may be constant) 778 ALength, // array length (or TOP if none) 779 ParmLimit 780 }; 781 782 static const TypeFunc* alloc_type(const Type* t) { 783 const Type** fields = TypeTuple::fields(ParmLimit - TypeFunc::Parms); 784 fields[AllocSize] = TypeInt::POS; 785 fields[KlassNode] = TypeInstPtr::NOTNULL; 786 fields[InitialTest] = TypeInt::BOOL; 787 fields[ALength] = t; // length (can be a bad length) 788 789 const TypeTuple *domain = TypeTuple::make(ParmLimit, fields); 790 791 // create result type (range) 792 fields = TypeTuple::fields(1); 793 fields[TypeFunc::Parms+0] = TypeRawPtr::NOTNULL; // Returned oop 794 795 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+1, fields); 796 797 return TypeFunc::make(domain, range); 798 } 799 800 // Result of Escape Analysis 801 bool _is_scalar_replaceable; 802 bool _is_non_escaping; 803 804 virtual uint size_of() const; // Size is bigger 805 AllocateNode(Compile* C, const TypeFunc *atype, Node *ctrl, Node *mem, Node *abio, 806 Node *size, Node *klass_node, Node *initial_test); 807 // Expansion modifies the JVMState, so we need to clone it 808 virtual void clone_jvms(Compile* C) { 809 if (jvms() != NULL) { 810 set_jvms(jvms()->clone_deep(C)); 811 jvms()->set_map_deep(this); 812 } 813 } 814 virtual int Opcode() const; 815 virtual uint ideal_reg() const { return Op_RegP; } 816 virtual bool guaranteed_safepoint() { return false; } 817 818 // allocations do not modify their arguments 819 virtual bool may_modify(const TypeOopPtr *t_oop, PhaseTransform *phase) { return false;} 820 821 // Pattern-match a possible usage of AllocateNode. 822 // Return null if no allocation is recognized. 823 // The operand is the pointer produced by the (possible) allocation. 824 // It must be a projection of the Allocate or its subsequent CastPP. 825 // (Note: This function is defined in file graphKit.cpp, near 826 // GraphKit::new_instance/new_array, whose output it recognizes.) 827 // The 'ptr' may not have an offset unless the 'offset' argument is given. 828 static AllocateNode* Ideal_allocation(Node* ptr, PhaseTransform* phase); 829 830 // Fancy version which uses AddPNode::Ideal_base_and_offset to strip 831 // an offset, which is reported back to the caller. 832 // (Note: AllocateNode::Ideal_allocation is defined in graphKit.cpp.) 833 static AllocateNode* Ideal_allocation(Node* ptr, PhaseTransform* phase, 834 intptr_t& offset); 835 836 // Dig the klass operand out of a (possible) allocation site. 837 static Node* Ideal_klass(Node* ptr, PhaseTransform* phase) { 838 AllocateNode* allo = Ideal_allocation(ptr, phase); 839 return (allo == NULL) ? NULL : allo->in(KlassNode); 840 } 841 842 // Conservatively small estimate of offset of first non-header byte. 843 int minimum_header_size() { 844 return is_AllocateArray() ? arrayOopDesc::base_offset_in_bytes(T_BYTE) : 845 instanceOopDesc::base_offset_in_bytes(); 846 } 847 848 // Return the corresponding initialization barrier (or null if none). 849 // Walks out edges to find it... 850 // (Note: Both InitializeNode::allocation and AllocateNode::initialization 851 // are defined in graphKit.cpp, which sets up the bidirectional relation.) 852 InitializeNode* initialization(); 853 854 // Convenience for initialization->maybe_set_complete(phase) 855 bool maybe_set_complete(PhaseGVN* phase); 856 }; 857 858 //------------------------------AllocateArray--------------------------------- 859 // 860 // High-level array allocation 861 // 862 class AllocateArrayNode : public AllocateNode { 863 public: 864 AllocateArrayNode(Compile* C, const TypeFunc *atype, Node *ctrl, Node *mem, Node *abio, 865 Node* size, Node* klass_node, Node* initial_test, 866 Node* count_val 867 ) 868 : AllocateNode(C, atype, ctrl, mem, abio, size, klass_node, 869 initial_test) 870 { 871 init_class_id(Class_AllocateArray); 872 set_req(AllocateNode::ALength, count_val); 873 } 874 virtual int Opcode() const; 875 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); 876 877 // Dig the length operand out of a array allocation site. 878 Node* Ideal_length() { 879 return in(AllocateNode::ALength); 880 } 881 882 // Dig the length operand out of a array allocation site and narrow the 883 // type with a CastII, if necesssary 884 Node* make_ideal_length(const TypeOopPtr* ary_type, PhaseTransform *phase, bool can_create = true); 885 886 // Pattern-match a possible usage of AllocateArrayNode. 887 // Return null if no allocation is recognized. 888 static AllocateArrayNode* Ideal_array_allocation(Node* ptr, PhaseTransform* phase) { 889 AllocateNode* allo = Ideal_allocation(ptr, phase); 890 return (allo == NULL || !allo->is_AllocateArray()) 891 ? NULL : allo->as_AllocateArray(); 892 } 893 }; 894 895 //------------------------------AbstractLockNode----------------------------------- 896 class AbstractLockNode: public CallNode { 897 private: 898 enum { 899 Regular = 0, // Normal lock 900 NonEscObj, // Lock is used for non escaping object 901 Coarsened, // Lock was coarsened 902 Nested // Nested lock 903 } _kind; 904 #ifndef PRODUCT 905 NamedCounter* _counter; 906 #endif 907 908 protected: 909 // helper functions for lock elimination 910 // 911 912 bool find_matching_unlock(const Node* ctrl, LockNode* lock, 913 GrowableArray<AbstractLockNode*> &lock_ops); 914 bool find_lock_and_unlock_through_if(Node* node, LockNode* lock, 915 GrowableArray<AbstractLockNode*> &lock_ops); 916 bool find_unlocks_for_region(const RegionNode* region, LockNode* lock, 917 GrowableArray<AbstractLockNode*> &lock_ops); 918 LockNode *find_matching_lock(UnlockNode* unlock); 919 920 // Update the counter to indicate that this lock was eliminated. 921 void set_eliminated_lock_counter() PRODUCT_RETURN; 922 923 public: 924 AbstractLockNode(const TypeFunc *tf) 925 : CallNode(tf, NULL, TypeRawPtr::BOTTOM), 926 _kind(Regular) 927 { 928 #ifndef PRODUCT 929 _counter = NULL; 930 #endif 931 } 932 virtual int Opcode() const = 0; 933 Node * obj_node() const {return in(TypeFunc::Parms + 0); } 934 Node * box_node() const {return in(TypeFunc::Parms + 1); } 935 Node * fastlock_node() const {return in(TypeFunc::Parms + 2); } 936 void set_box_node(Node* box) { set_req(TypeFunc::Parms + 1, box); } 937 938 const Type *sub(const Type *t1, const Type *t2) const { return TypeInt::CC;} 939 940 virtual uint size_of() const { return sizeof(*this); } 941 942 bool is_eliminated() const { return (_kind != Regular); } 943 bool is_non_esc_obj() const { return (_kind == NonEscObj); } 944 bool is_coarsened() const { return (_kind == Coarsened); } 945 bool is_nested() const { return (_kind == Nested); } 946 947 void set_non_esc_obj() { _kind = NonEscObj; set_eliminated_lock_counter(); } 948 void set_coarsened() { _kind = Coarsened; set_eliminated_lock_counter(); } 949 void set_nested() { _kind = Nested; set_eliminated_lock_counter(); } 950 951 // locking does not modify its arguments 952 virtual bool may_modify(const TypeOopPtr *t_oop, PhaseTransform *phase){ return false;} 953 954 #ifndef PRODUCT 955 void create_lock_counter(JVMState* s); 956 NamedCounter* counter() const { return _counter; } 957 #endif 958 }; 959 960 //------------------------------Lock--------------------------------------- 961 // High-level lock operation 962 // 963 // This is a subclass of CallNode because it is a macro node which gets expanded 964 // into a code sequence containing a call. This node takes 3 "parameters": 965 // 0 - object to lock 966 // 1 - a BoxLockNode 967 // 2 - a FastLockNode 968 // 969 class LockNode : public AbstractLockNode { 970 public: 971 972 static const TypeFunc *lock_type() { 973 // create input type (domain) 974 const Type **fields = TypeTuple::fields(3); 975 fields[TypeFunc::Parms+0] = TypeInstPtr::NOTNULL; // Object to be Locked 976 fields[TypeFunc::Parms+1] = TypeRawPtr::BOTTOM; // Address of stack location for lock 977 fields[TypeFunc::Parms+2] = TypeInt::BOOL; // FastLock 978 const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+3,fields); 979 980 // create result type (range) 981 fields = TypeTuple::fields(0); 982 983 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+0,fields); 984 985 return TypeFunc::make(domain,range); 986 } 987 988 virtual int Opcode() const; 989 virtual uint size_of() const; // Size is bigger 990 LockNode(Compile* C, const TypeFunc *tf) : AbstractLockNode( tf ) { 991 init_class_id(Class_Lock); 992 init_flags(Flag_is_macro); 993 C->add_macro_node(this); 994 } 995 virtual bool guaranteed_safepoint() { return false; } 996 997 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); 998 // Expansion modifies the JVMState, so we need to clone it 999 virtual void clone_jvms(Compile* C) { 1000 if (jvms() != NULL) { 1001 set_jvms(jvms()->clone_deep(C)); 1002 jvms()->set_map_deep(this); 1003 } 1004 } 1005 1006 bool is_nested_lock_region(); // Is this Lock nested? 1007 }; 1008 1009 //------------------------------Unlock--------------------------------------- 1010 // High-level unlock operation 1011 class UnlockNode : public AbstractLockNode { 1012 public: 1013 virtual int Opcode() const; 1014 virtual uint size_of() const; // Size is bigger 1015 UnlockNode(Compile* C, const TypeFunc *tf) : AbstractLockNode( tf ) { 1016 init_class_id(Class_Unlock); 1017 init_flags(Flag_is_macro); 1018 C->add_macro_node(this); 1019 } 1020 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); 1021 // unlock is never a safepoint 1022 virtual bool guaranteed_safepoint() { return false; } 1023 }; 1024 1025 #endif // SHARE_VM_OPTO_CALLNODE_HPP