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annotate src/share/vm/opto/callnode.hpp @ 1552:c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
Summary: Change all the Sun copyrights to Oracle copyright
Reviewed-by: ohair
| author | trims |
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| date | Thu, 27 May 2010 19:08:38 -0700 |
| parents | 97125851f396 |
| children | f95d63e2154a |
| rev | line source |
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| 0 | 1 /* |
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2 * Copyright (c) 1997, 2009, Oracle and/or its affiliates. All rights reserved. |
| 0 | 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 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 25 // Portions of code courtesy of Clifford Click | |
| 26 | |
| 27 // Optimization - Graph Style | |
| 28 | |
| 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; | |
| 33 | 41 class AllocateArrayNode; |
| 0 | 42 class LockNode; |
| 43 class UnlockNode; | |
| 44 class JVMState; | |
| 45 class OopMap; | |
| 46 class State; | |
| 47 class StartNode; | |
| 48 class MachCallNode; | |
| 49 class FastLockNode; | |
| 50 | |
| 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 }; | |
| 78 | |
| 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 }; | |
| 87 | |
| 88 | |
| 89 //------------------------------ParmNode--------------------------------------- | |
| 90 // Incoming parameters | |
| 91 class ParmNode : public ProjNode { | |
| 92 static const char * const names[TypeFunc::Parms+1]; | |
| 93 public: | |
| 33 | 94 ParmNode( StartNode *src, uint con ) : ProjNode(src,con) { |
| 95 init_class_id(Class_Parm); | |
| 96 } | |
| 0 | 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 }; | |
| 104 | |
| 105 | |
| 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 }; | |
| 123 | |
| 124 | |
| 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 }; | |
| 144 | |
| 145 | |
| 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 } | |
| 155 | |
| 156 virtual int Opcode() const; | |
| 157 virtual uint match_edge(uint idx) const; | |
| 158 }; | |
| 159 | |
| 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 } | |
| 169 | |
| 170 virtual int Opcode() const; | |
| 171 virtual uint match_edge(uint idx) const; | |
| 172 }; | |
| 173 | |
| 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 { | |
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181 public: |
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182 typedef enum { |
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183 Reexecute_Undefined = -1, // not defined -- will be translated into false later |
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184 Reexecute_False = 0, // false -- do not reexecute |
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185 Reexecute_True = 1 // true -- reexecute the bytecode |
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186 } ReexecuteState; //Reexecute State |
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187 |
| 0 | 188 private: |
| 189 JVMState* _caller; // List pointer for forming scope chains | |
| 190 uint _depth; // One mroe than caller depth, or one. | |
| 191 uint _locoff; // Offset to locals in input edge mapping | |
| 192 uint _stkoff; // Offset to stack in input edge mapping | |
| 193 uint _monoff; // Offset to monitors in input edge mapping | |
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194 uint _scloff; // Offset to fields of scalar objs in input edge mapping |
| 0 | 195 uint _endoff; // Offset to end of input edge mapping |
| 196 uint _sp; // Jave Expression Stack Pointer for this state | |
| 197 int _bci; // Byte Code Index of this JVM point | |
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198 ReexecuteState _reexecute; // Whether this bytecode need to be re-executed |
| 0 | 199 ciMethod* _method; // Method Pointer |
| 200 SafePointNode* _map; // Map node associated with this scope | |
| 201 public: | |
| 202 friend class Compile; | |
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203 friend class PreserveReexecuteState; |
| 0 | 204 |
| 205 // Because JVMState objects live over the entire lifetime of the | |
| 206 // Compile object, they are allocated into the comp_arena, which | |
| 207 // does not get resource marked or reset during the compile process | |
| 208 void *operator new( size_t x, Compile* C ) { return C->comp_arena()->Amalloc(x); } | |
| 209 void operator delete( void * ) { } // fast deallocation | |
| 210 | |
| 211 // Create a new JVMState, ready for abstract interpretation. | |
| 212 JVMState(ciMethod* method, JVMState* caller); | |
| 213 JVMState(int stack_size); // root state; has a null method | |
| 214 | |
| 215 // Access functions for the JVM | |
| 216 uint locoff() const { return _locoff; } | |
| 217 uint stkoff() const { return _stkoff; } | |
| 218 uint argoff() const { return _stkoff + _sp; } | |
| 219 uint monoff() const { return _monoff; } | |
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220 uint scloff() const { return _scloff; } |
| 0 | 221 uint endoff() const { return _endoff; } |
| 222 uint oopoff() const { return debug_end(); } | |
| 223 | |
| 224 int loc_size() const { return _stkoff - _locoff; } | |
| 225 int stk_size() const { return _monoff - _stkoff; } | |
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226 int mon_size() const { return _scloff - _monoff; } |
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227 int scl_size() const { return _endoff - _scloff; } |
| 0 | 228 |
| 229 bool is_loc(uint i) const { return i >= _locoff && i < _stkoff; } | |
| 230 bool is_stk(uint i) const { return i >= _stkoff && i < _monoff; } | |
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231 bool is_mon(uint i) const { return i >= _monoff && i < _scloff; } |
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232 bool is_scl(uint i) const { return i >= _scloff && i < _endoff; } |
| 0 | 233 |
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234 uint sp() const { return _sp; } |
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235 int bci() const { return _bci; } |
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236 bool should_reexecute() const { return _reexecute==Reexecute_True; } |
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237 bool is_reexecute_undefined() const { return _reexecute==Reexecute_Undefined; } |
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238 bool has_method() const { return _method != NULL; } |
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239 ciMethod* method() const { assert(has_method(), ""); return _method; } |
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240 JVMState* caller() const { return _caller; } |
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241 SafePointNode* map() const { return _map; } |
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242 uint depth() const { return _depth; } |
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243 uint debug_start() const; // returns locoff of root caller |
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244 uint debug_end() const; // returns endoff of self |
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245 uint debug_size() const { |
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246 return loc_size() + sp() + mon_size() + scl_size(); |
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247 } |
| 0 | 248 uint debug_depth() const; // returns sum of debug_size values at all depths |
| 249 | |
| 250 // Returns the JVM state at the desired depth (1 == root). | |
| 251 JVMState* of_depth(int d) const; | |
| 252 | |
| 253 // Tells if two JVM states have the same call chain (depth, methods, & bcis). | |
| 254 bool same_calls_as(const JVMState* that) const; | |
| 255 | |
| 256 // Monitors (monitors are stored as (boxNode, objNode) pairs | |
| 257 enum { logMonitorEdges = 1 }; | |
| 258 int nof_monitors() const { return mon_size() >> logMonitorEdges; } | |
| 259 int monitor_depth() const { return nof_monitors() + (caller() ? caller()->monitor_depth() : 0); } | |
| 260 int monitor_box_offset(int idx) const { return monoff() + (idx << logMonitorEdges) + 0; } | |
| 261 int monitor_obj_offset(int idx) const { return monoff() + (idx << logMonitorEdges) + 1; } | |
| 262 bool is_monitor_box(uint off) const { | |
| 263 assert(is_mon(off), "should be called only for monitor edge"); | |
| 264 return (0 == bitfield(off - monoff(), 0, logMonitorEdges)); | |
| 265 } | |
| 266 bool is_monitor_use(uint off) const { return (is_mon(off) | |
| 267 && is_monitor_box(off)) | |
| 268 || (caller() && caller()->is_monitor_use(off)); } | |
| 269 | |
| 270 // Initialization functions for the JVM | |
| 271 void set_locoff(uint off) { _locoff = off; } | |
| 272 void set_stkoff(uint off) { _stkoff = off; } | |
| 273 void set_monoff(uint off) { _monoff = off; } | |
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274 void set_scloff(uint off) { _scloff = off; } |
| 0 | 275 void set_endoff(uint off) { _endoff = off; } |
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276 void set_offsets(uint off) { |
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277 _locoff = _stkoff = _monoff = _scloff = _endoff = off; |
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278 } |
| 0 | 279 void set_map(SafePointNode *map) { _map = map; } |
| 280 void set_sp(uint sp) { _sp = sp; } | |
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281 // _reexecute is initialized to "undefined" for a new bci |
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282 void set_bci(int bci) {if(_bci != bci)_reexecute=Reexecute_Undefined; _bci = bci; } |
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283 void set_should_reexecute(bool reexec) {_reexecute = reexec ? Reexecute_True : Reexecute_False;} |
| 0 | 284 |
| 285 // Miscellaneous utility functions | |
| 286 JVMState* clone_deep(Compile* C) const; // recursively clones caller chain | |
| 287 JVMState* clone_shallow(Compile* C) const; // retains uncloned caller | |
| 288 | |
| 289 #ifndef PRODUCT | |
| 290 void format(PhaseRegAlloc *regalloc, const Node *n, outputStream* st) const; | |
| 291 void dump_spec(outputStream *st) const; | |
| 292 void dump_on(outputStream* st) const; | |
| 293 void dump() const { | |
| 294 dump_on(tty); | |
| 295 } | |
| 296 #endif | |
| 297 }; | |
| 298 | |
| 299 //------------------------------SafePointNode---------------------------------- | |
| 300 // A SafePointNode is a subclass of a MultiNode for convenience (and | |
| 301 // potential code sharing) only - conceptually it is independent of | |
| 302 // the Node semantics. | |
| 303 class SafePointNode : public MultiNode { | |
| 304 virtual uint cmp( const Node &n ) const; | |
| 305 virtual uint size_of() const; // Size is bigger | |
| 306 | |
| 307 public: | |
| 308 SafePointNode(uint edges, JVMState* jvms, | |
| 309 // A plain safepoint advertises no memory effects (NULL): | |
| 310 const TypePtr* adr_type = NULL) | |
| 311 : MultiNode( edges ), | |
| 312 _jvms(jvms), | |
| 313 _oop_map(NULL), | |
| 314 _adr_type(adr_type) | |
| 315 { | |
| 316 init_class_id(Class_SafePoint); | |
| 317 } | |
| 318 | |
| 319 OopMap* _oop_map; // Array of OopMap info (8-bit char) for GC | |
| 320 JVMState* const _jvms; // Pointer to list of JVM State objects | |
| 321 const TypePtr* _adr_type; // What type of memory does this node produce? | |
| 322 | |
| 323 // Many calls take *all* of memory as input, | |
| 324 // but some produce a limited subset of that memory as output. | |
| 325 // The adr_type reports the call's behavior as a store, not a load. | |
| 326 | |
| 327 virtual JVMState* jvms() const { return _jvms; } | |
| 328 void set_jvms(JVMState* s) { | |
| 329 *(JVMState**)&_jvms = s; // override const attribute in the accessor | |
| 330 } | |
| 331 OopMap *oop_map() const { return _oop_map; } | |
| 332 void set_oop_map(OopMap *om) { _oop_map = om; } | |
| 333 | |
| 334 // Functionality from old debug nodes which has changed | |
| 335 Node *local(JVMState* jvms, uint idx) const { | |
| 336 assert(verify_jvms(jvms), "jvms must match"); | |
| 337 return in(jvms->locoff() + idx); | |
| 338 } | |
| 339 Node *stack(JVMState* jvms, uint idx) const { | |
| 340 assert(verify_jvms(jvms), "jvms must match"); | |
| 341 return in(jvms->stkoff() + idx); | |
| 342 } | |
| 343 Node *argument(JVMState* jvms, uint idx) const { | |
| 344 assert(verify_jvms(jvms), "jvms must match"); | |
| 345 return in(jvms->argoff() + idx); | |
| 346 } | |
| 347 Node *monitor_box(JVMState* jvms, uint idx) const { | |
| 348 assert(verify_jvms(jvms), "jvms must match"); | |
| 349 return in(jvms->monitor_box_offset(idx)); | |
| 350 } | |
| 351 Node *monitor_obj(JVMState* jvms, uint idx) const { | |
| 352 assert(verify_jvms(jvms), "jvms must match"); | |
| 353 return in(jvms->monitor_obj_offset(idx)); | |
| 354 } | |
| 355 | |
| 356 void set_local(JVMState* jvms, uint idx, Node *c); | |
| 357 | |
| 358 void set_stack(JVMState* jvms, uint idx, Node *c) { | |
| 359 assert(verify_jvms(jvms), "jvms must match"); | |
| 360 set_req(jvms->stkoff() + idx, c); | |
| 361 } | |
| 362 void set_argument(JVMState* jvms, uint idx, Node *c) { | |
| 363 assert(verify_jvms(jvms), "jvms must match"); | |
| 364 set_req(jvms->argoff() + idx, c); | |
| 365 } | |
| 366 void ensure_stack(JVMState* jvms, uint stk_size) { | |
| 367 assert(verify_jvms(jvms), "jvms must match"); | |
| 368 int grow_by = (int)stk_size - (int)jvms->stk_size(); | |
| 369 if (grow_by > 0) grow_stack(jvms, grow_by); | |
| 370 } | |
| 371 void grow_stack(JVMState* jvms, uint grow_by); | |
| 372 // Handle monitor stack | |
| 373 void push_monitor( const FastLockNode *lock ); | |
| 374 void pop_monitor (); | |
| 375 Node *peek_monitor_box() const; | |
| 376 Node *peek_monitor_obj() const; | |
| 377 | |
| 378 // Access functions for the JVM | |
| 379 Node *control () const { return in(TypeFunc::Control ); } | |
| 380 Node *i_o () const { return in(TypeFunc::I_O ); } | |
| 381 Node *memory () const { return in(TypeFunc::Memory ); } | |
| 382 Node *returnadr() const { return in(TypeFunc::ReturnAdr); } | |
| 383 Node *frameptr () const { return in(TypeFunc::FramePtr ); } | |
| 384 | |
| 385 void set_control ( Node *c ) { set_req(TypeFunc::Control,c); } | |
| 386 void set_i_o ( Node *c ) { set_req(TypeFunc::I_O ,c); } | |
| 387 void set_memory ( Node *c ) { set_req(TypeFunc::Memory ,c); } | |
| 388 | |
| 389 MergeMemNode* merged_memory() const { | |
| 390 return in(TypeFunc::Memory)->as_MergeMem(); | |
| 391 } | |
| 392 | |
| 393 // The parser marks useless maps as dead when it's done with them: | |
| 394 bool is_killed() { return in(TypeFunc::Control) == NULL; } | |
| 395 | |
| 396 // Exception states bubbling out of subgraphs such as inlined calls | |
| 397 // are recorded here. (There might be more than one, hence the "next".) | |
| 398 // This feature is used only for safepoints which serve as "maps" | |
| 399 // for JVM states during parsing, intrinsic expansion, etc. | |
| 400 SafePointNode* next_exception() const; | |
| 401 void set_next_exception(SafePointNode* n); | |
| 402 bool has_exceptions() const { return next_exception() != NULL; } | |
| 403 | |
| 404 // Standard Node stuff | |
| 405 virtual int Opcode() const; | |
| 406 virtual bool pinned() const { return true; } | |
| 407 virtual const Type *Value( PhaseTransform *phase ) const; | |
| 408 virtual const Type *bottom_type() const { return Type::CONTROL; } | |
| 409 virtual const TypePtr *adr_type() const { return _adr_type; } | |
| 410 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); | |
| 411 virtual Node *Identity( PhaseTransform *phase ); | |
| 412 virtual uint ideal_reg() const { return 0; } | |
| 413 virtual const RegMask &in_RegMask(uint) const; | |
| 414 virtual const RegMask &out_RegMask() const; | |
| 415 virtual uint match_edge(uint idx) const; | |
| 416 | |
| 417 static bool needs_polling_address_input(); | |
| 418 | |
| 419 #ifndef PRODUCT | |
| 420 virtual void dump_spec(outputStream *st) const; | |
| 421 #endif | |
| 422 }; | |
| 423 | |
|
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424 //------------------------------SafePointScalarObjectNode---------------------- |
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425 // A SafePointScalarObjectNode represents the state of a scalarized object |
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426 // at a safepoint. |
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427 |
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428 class SafePointScalarObjectNode: public TypeNode { |
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429 uint _first_index; // First input edge index of a SafePoint node where |
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430 // states of the scalarized object fields are collected. |
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431 uint _n_fields; // Number of non-static fields of the scalarized object. |
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432 DEBUG_ONLY(AllocateNode* _alloc;) |
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433 public: |
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434 SafePointScalarObjectNode(const TypeOopPtr* tp, |
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435 #ifdef ASSERT |
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436 AllocateNode* alloc, |
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437 #endif |
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438 uint first_index, uint n_fields); |
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439 virtual int Opcode() const; |
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440 virtual uint ideal_reg() const; |
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441 virtual const RegMask &in_RegMask(uint) const; |
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442 virtual const RegMask &out_RegMask() const; |
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443 virtual uint match_edge(uint idx) const; |
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444 |
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445 uint first_index() const { return _first_index; } |
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446 uint n_fields() const { return _n_fields; } |
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447 DEBUG_ONLY(AllocateNode* alloc() const { return _alloc; }) |
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448 |
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449 // SafePointScalarObject should be always pinned to the control edge |
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450 // of the SafePoint node for which it was generated. |
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451 virtual bool pinned() const; // { return true; } |
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452 |
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453 // SafePointScalarObject depends on the SafePoint node |
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454 // for which it was generated. |
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455 virtual bool depends_only_on_test() const; // { return false; } |
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456 |
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457 virtual uint size_of() const { return sizeof(*this); } |
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458 |
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459 // Assumes that "this" is an argument to a safepoint node "s", and that |
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460 // "new_call" is being created to correspond to "s". But the difference |
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461 // between the start index of the jvmstates of "new_call" and "s" is |
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462 // "jvms_adj". Produce and return a SafePointScalarObjectNode that |
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463 // corresponds appropriately to "this" in "new_call". Assumes that |
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464 // "sosn_map" is a map, specific to the translation of "s" to "new_call", |
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465 // mapping old SafePointScalarObjectNodes to new, to avoid multiple copies. |
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466 SafePointScalarObjectNode* clone(int jvms_adj, Dict* sosn_map) const; |
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467 |
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468 #ifndef PRODUCT |
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469 virtual void dump_spec(outputStream *st) const; |
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470 #endif |
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471 }; |
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472 |
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473 |
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474 // Simple container for the outgoing projections of a call. Useful |
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475 // for serious surgery on calls. |
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476 class CallProjections : public StackObj { |
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477 public: |
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478 Node* fallthrough_proj; |
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479 Node* fallthrough_catchproj; |
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480 Node* fallthrough_memproj; |
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481 Node* fallthrough_ioproj; |
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482 Node* catchall_catchproj; |
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483 Node* catchall_memproj; |
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484 Node* catchall_ioproj; |
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485 Node* resproj; |
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486 Node* exobj; |
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487 }; |
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488 |
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489 |
| 0 | 490 //------------------------------CallNode--------------------------------------- |
| 491 // Call nodes now subsume the function of debug nodes at callsites, so they | |
| 492 // contain the functionality of a full scope chain of debug nodes. | |
| 493 class CallNode : public SafePointNode { | |
| 494 public: | |
| 495 const TypeFunc *_tf; // Function type | |
| 496 address _entry_point; // Address of method being called | |
| 497 float _cnt; // Estimate of number of times called | |
| 498 | |
| 499 CallNode(const TypeFunc* tf, address addr, const TypePtr* adr_type) | |
| 500 : SafePointNode(tf->domain()->cnt(), NULL, adr_type), | |
| 501 _tf(tf), | |
| 502 _entry_point(addr), | |
| 503 _cnt(COUNT_UNKNOWN) | |
| 504 { | |
| 505 init_class_id(Class_Call); | |
| 506 init_flags(Flag_is_Call); | |
| 507 } | |
| 508 | |
| 509 const TypeFunc* tf() const { return _tf; } | |
| 510 const address entry_point() const { return _entry_point; } | |
| 511 const float cnt() const { return _cnt; } | |
| 512 | |
| 513 void set_tf(const TypeFunc* tf) { _tf = tf; } | |
| 514 void set_entry_point(address p) { _entry_point = p; } | |
| 515 void set_cnt(float c) { _cnt = c; } | |
| 516 | |
| 517 virtual const Type *bottom_type() const; | |
| 518 virtual const Type *Value( PhaseTransform *phase ) const; | |
| 519 virtual Node *Identity( PhaseTransform *phase ) { return this; } | |
| 520 virtual uint cmp( const Node &n ) const; | |
| 521 virtual uint size_of() const = 0; | |
| 522 virtual void calling_convention( BasicType* sig_bt, VMRegPair *parm_regs, uint argcnt ) const; | |
| 523 virtual Node *match( const ProjNode *proj, const Matcher *m ); | |
| 524 virtual uint ideal_reg() const { return NotAMachineReg; } | |
| 525 // Are we guaranteed that this node is a safepoint? Not true for leaf calls and | |
| 526 // for some macro nodes whose expansion does not have a safepoint on the fast path. | |
| 527 virtual bool guaranteed_safepoint() { return true; } | |
| 528 // For macro nodes, the JVMState gets modified during expansion, so when cloning | |
| 529 // the node the JVMState must be cloned. | |
| 530 virtual void clone_jvms() { } // default is not to clone | |
| 531 | |
| 65 | 532 // Returns true if the call may modify n |
| 533 virtual bool may_modify(const TypePtr *addr_t, PhaseTransform *phase); | |
| 534 // Does this node have a use of n other than in debug information? | |
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535 bool has_non_debug_use(Node *n); |
| 65 | 536 // Returns the unique CheckCastPP of a call |
| 537 // or result projection is there are several CheckCastPP | |
| 538 // or returns NULL if there is no one. | |
| 539 Node *result_cast(); | |
| 540 | |
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541 // Collect all the interesting edges from a call for use in |
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542 // replacing the call by something else. Used by macro expansion |
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543 // and the late inlining support. |
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544 void extract_projections(CallProjections* projs, bool separate_io_proj); |
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545 |
| 0 | 546 virtual uint match_edge(uint idx) const; |
| 547 | |
| 548 #ifndef PRODUCT | |
| 549 virtual void dump_req() const; | |
| 550 virtual void dump_spec(outputStream *st) const; | |
| 551 #endif | |
| 552 }; | |
| 553 | |
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554 |
| 0 | 555 //------------------------------CallJavaNode----------------------------------- |
| 556 // Make a static or dynamic subroutine call node using Java calling | |
| 557 // convention. (The "Java" calling convention is the compiler's calling | |
| 558 // convention, as opposed to the interpreter's or that of native C.) | |
| 559 class CallJavaNode : public CallNode { | |
| 560 protected: | |
| 561 virtual uint cmp( const Node &n ) const; | |
| 562 virtual uint size_of() const; // Size is bigger | |
| 563 | |
| 564 bool _optimized_virtual; | |
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565 bool _method_handle_invoke; |
| 0 | 566 ciMethod* _method; // Method being direct called |
| 567 public: | |
| 568 const int _bci; // Byte Code Index of call byte code | |
| 569 CallJavaNode(const TypeFunc* tf , address addr, ciMethod* method, int bci) | |
| 570 : CallNode(tf, addr, TypePtr::BOTTOM), | |
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571 _method(method), _bci(bci), |
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572 _optimized_virtual(false), |
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573 _method_handle_invoke(false) |
| 0 | 574 { |
| 575 init_class_id(Class_CallJava); | |
| 576 } | |
| 577 | |
| 578 virtual int Opcode() const; | |
| 579 ciMethod* method() const { return _method; } | |
| 580 void set_method(ciMethod *m) { _method = m; } | |
| 581 void set_optimized_virtual(bool f) { _optimized_virtual = f; } | |
| 582 bool is_optimized_virtual() const { return _optimized_virtual; } | |
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583 void set_method_handle_invoke(bool f) { _method_handle_invoke = f; } |
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584 bool is_method_handle_invoke() const { return _method_handle_invoke; } |
| 0 | 585 |
| 586 #ifndef PRODUCT | |
| 587 virtual void dump_spec(outputStream *st) const; | |
| 588 #endif | |
| 589 }; | |
| 590 | |
| 591 //------------------------------CallStaticJavaNode----------------------------- | |
| 592 // Make a direct subroutine call using Java calling convention (for static | |
| 593 // calls and optimized virtual calls, plus calls to wrappers for run-time | |
| 594 // routines); generates static stub. | |
| 595 class CallStaticJavaNode : public CallJavaNode { | |
| 596 virtual uint cmp( const Node &n ) const; | |
| 597 virtual uint size_of() const; // Size is bigger | |
| 598 public: | |
| 599 CallStaticJavaNode(const TypeFunc* tf, address addr, ciMethod* method, int bci) | |
| 600 : CallJavaNode(tf, addr, method, bci), _name(NULL) { | |
| 601 init_class_id(Class_CallStaticJava); | |
| 602 } | |
| 603 CallStaticJavaNode(const TypeFunc* tf, address addr, const char* name, int bci, | |
| 604 const TypePtr* adr_type) | |
| 605 : CallJavaNode(tf, addr, NULL, bci), _name(name) { | |
| 606 init_class_id(Class_CallStaticJava); | |
| 607 // This node calls a runtime stub, which often has narrow memory effects. | |
| 608 _adr_type = adr_type; | |
| 609 } | |
| 610 const char *_name; // Runtime wrapper name | |
| 611 | |
| 612 // If this is an uncommon trap, return the request code, else zero. | |
| 613 int uncommon_trap_request() const; | |
| 614 static int extract_uncommon_trap_request(const Node* call); | |
| 615 | |
| 616 virtual int Opcode() const; | |
| 617 #ifndef PRODUCT | |
| 618 virtual void dump_spec(outputStream *st) const; | |
| 619 #endif | |
| 620 }; | |
| 621 | |
| 622 //------------------------------CallDynamicJavaNode---------------------------- | |
| 623 // Make a dispatched call using Java calling convention. | |
| 624 class CallDynamicJavaNode : public CallJavaNode { | |
| 625 virtual uint cmp( const Node &n ) const; | |
| 626 virtual uint size_of() const; // Size is bigger | |
| 627 public: | |
| 628 CallDynamicJavaNode( const TypeFunc *tf , address addr, ciMethod* method, int vtable_index, int bci ) : CallJavaNode(tf,addr,method,bci), _vtable_index(vtable_index) { | |
| 629 init_class_id(Class_CallDynamicJava); | |
| 630 } | |
| 631 | |
| 632 int _vtable_index; | |
| 633 virtual int Opcode() const; | |
| 634 #ifndef PRODUCT | |
| 635 virtual void dump_spec(outputStream *st) const; | |
| 636 #endif | |
| 637 }; | |
| 638 | |
| 639 //------------------------------CallRuntimeNode-------------------------------- | |
| 640 // Make a direct subroutine call node into compiled C++ code. | |
| 641 class CallRuntimeNode : public CallNode { | |
| 642 virtual uint cmp( const Node &n ) const; | |
| 643 virtual uint size_of() const; // Size is bigger | |
| 644 public: | |
| 645 CallRuntimeNode(const TypeFunc* tf, address addr, const char* name, | |
| 646 const TypePtr* adr_type) | |
| 647 : CallNode(tf, addr, adr_type), | |
| 648 _name(name) | |
| 649 { | |
| 650 init_class_id(Class_CallRuntime); | |
| 651 } | |
| 652 | |
| 653 const char *_name; // Printable name, if _method is NULL | |
| 654 virtual int Opcode() const; | |
| 655 virtual void calling_convention( BasicType* sig_bt, VMRegPair *parm_regs, uint argcnt ) const; | |
| 656 | |
| 657 #ifndef PRODUCT | |
| 658 virtual void dump_spec(outputStream *st) const; | |
| 659 #endif | |
| 660 }; | |
| 661 | |
| 662 //------------------------------CallLeafNode----------------------------------- | |
| 663 // Make a direct subroutine call node into compiled C++ code, without | |
| 664 // safepoints | |
| 665 class CallLeafNode : public CallRuntimeNode { | |
| 666 public: | |
| 667 CallLeafNode(const TypeFunc* tf, address addr, const char* name, | |
| 668 const TypePtr* adr_type) | |
| 669 : CallRuntimeNode(tf, addr, name, adr_type) | |
| 670 { | |
| 671 init_class_id(Class_CallLeaf); | |
| 672 } | |
| 673 virtual int Opcode() const; | |
| 674 virtual bool guaranteed_safepoint() { return false; } | |
| 675 #ifndef PRODUCT | |
| 676 virtual void dump_spec(outputStream *st) const; | |
| 677 #endif | |
| 678 }; | |
| 679 | |
| 680 //------------------------------CallLeafNoFPNode------------------------------- | |
| 681 // CallLeafNode, not using floating point or using it in the same manner as | |
| 682 // the generated code | |
| 683 class CallLeafNoFPNode : public CallLeafNode { | |
| 684 public: | |
| 685 CallLeafNoFPNode(const TypeFunc* tf, address addr, const char* name, | |
| 686 const TypePtr* adr_type) | |
| 687 : CallLeafNode(tf, addr, name, adr_type) | |
| 688 { | |
| 689 } | |
| 690 virtual int Opcode() const; | |
| 691 }; | |
| 692 | |
| 693 | |
| 694 //------------------------------Allocate--------------------------------------- | |
| 695 // High-level memory allocation | |
| 696 // | |
| 697 // AllocateNode and AllocateArrayNode are subclasses of CallNode because they will | |
| 698 // get expanded into a code sequence containing a call. Unlike other CallNodes, | |
| 699 // they have 2 memory projections and 2 i_o projections (which are distinguished by | |
| 700 // the _is_io_use flag in the projection.) This is needed when expanding the node in | |
| 701 // order to differentiate the uses of the projection on the normal control path from | |
| 702 // those on the exception return path. | |
| 703 // | |
| 704 class AllocateNode : public CallNode { | |
| 705 public: | |
| 706 enum { | |
| 707 // Output: | |
| 708 RawAddress = TypeFunc::Parms, // the newly-allocated raw address | |
| 709 // Inputs: | |
| 710 AllocSize = TypeFunc::Parms, // size (in bytes) of the new object | |
| 711 KlassNode, // type (maybe dynamic) of the obj. | |
| 712 InitialTest, // slow-path test (may be constant) | |
| 713 ALength, // array length (or TOP if none) | |
| 714 ParmLimit | |
| 715 }; | |
| 716 | |
| 717 static const TypeFunc* alloc_type() { | |
| 718 const Type** fields = TypeTuple::fields(ParmLimit - TypeFunc::Parms); | |
| 719 fields[AllocSize] = TypeInt::POS; | |
| 720 fields[KlassNode] = TypeInstPtr::NOTNULL; | |
| 721 fields[InitialTest] = TypeInt::BOOL; | |
| 722 fields[ALength] = TypeInt::INT; // length (can be a bad length) | |
| 723 | |
| 724 const TypeTuple *domain = TypeTuple::make(ParmLimit, fields); | |
| 725 | |
| 726 // create result type (range) | |
| 727 fields = TypeTuple::fields(1); | |
| 728 fields[TypeFunc::Parms+0] = TypeRawPtr::NOTNULL; // Returned oop | |
| 729 | |
| 730 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+1, fields); | |
| 731 | |
| 732 return TypeFunc::make(domain, range); | |
| 733 } | |
| 734 | |
|
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735 bool _is_scalar_replaceable; // Result of Escape Analysis |
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736 |
| 0 | 737 virtual uint size_of() const; // Size is bigger |
| 738 AllocateNode(Compile* C, const TypeFunc *atype, Node *ctrl, Node *mem, Node *abio, | |
| 739 Node *size, Node *klass_node, Node *initial_test); | |
| 740 // Expansion modifies the JVMState, so we need to clone it | |
| 741 virtual void clone_jvms() { | |
| 742 set_jvms(jvms()->clone_deep(Compile::current())); | |
| 743 } | |
| 744 virtual int Opcode() const; | |
| 745 virtual uint ideal_reg() const { return Op_RegP; } | |
| 746 virtual bool guaranteed_safepoint() { return false; } | |
| 747 | |
| 65 | 748 // allocations do not modify their arguments |
| 749 virtual bool may_modify(const TypePtr *addr_t, PhaseTransform *phase) { return false;} | |
| 750 | |
| 0 | 751 // Pattern-match a possible usage of AllocateNode. |
| 752 // Return null if no allocation is recognized. | |
| 753 // The operand is the pointer produced by the (possible) allocation. | |
| 754 // It must be a projection of the Allocate or its subsequent CastPP. | |
| 755 // (Note: This function is defined in file graphKit.cpp, near | |
| 756 // GraphKit::new_instance/new_array, whose output it recognizes.) | |
| 757 // The 'ptr' may not have an offset unless the 'offset' argument is given. | |
| 758 static AllocateNode* Ideal_allocation(Node* ptr, PhaseTransform* phase); | |
| 759 | |
| 760 // Fancy version which uses AddPNode::Ideal_base_and_offset to strip | |
| 761 // an offset, which is reported back to the caller. | |
| 762 // (Note: AllocateNode::Ideal_allocation is defined in graphKit.cpp.) | |
| 763 static AllocateNode* Ideal_allocation(Node* ptr, PhaseTransform* phase, | |
| 764 intptr_t& offset); | |
| 765 | |
| 766 // Dig the klass operand out of a (possible) allocation site. | |
| 767 static Node* Ideal_klass(Node* ptr, PhaseTransform* phase) { | |
| 768 AllocateNode* allo = Ideal_allocation(ptr, phase); | |
| 769 return (allo == NULL) ? NULL : allo->in(KlassNode); | |
| 770 } | |
| 771 | |
| 772 // Conservatively small estimate of offset of first non-header byte. | |
| 773 int minimum_header_size() { | |
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774 return is_AllocateArray() ? arrayOopDesc::base_offset_in_bytes(T_BYTE) : |
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775 instanceOopDesc::base_offset_in_bytes(); |
| 0 | 776 } |
| 777 | |
| 778 // Return the corresponding initialization barrier (or null if none). | |
| 779 // Walks out edges to find it... | |
| 780 // (Note: Both InitializeNode::allocation and AllocateNode::initialization | |
| 781 // are defined in graphKit.cpp, which sets up the bidirectional relation.) | |
| 782 InitializeNode* initialization(); | |
| 783 | |
| 784 // Convenience for initialization->maybe_set_complete(phase) | |
| 785 bool maybe_set_complete(PhaseGVN* phase); | |
| 786 }; | |
| 787 | |
| 788 //------------------------------AllocateArray--------------------------------- | |
| 789 // | |
| 790 // High-level array allocation | |
| 791 // | |
| 792 class AllocateArrayNode : public AllocateNode { | |
| 793 public: | |
| 794 AllocateArrayNode(Compile* C, const TypeFunc *atype, Node *ctrl, Node *mem, Node *abio, | |
| 795 Node* size, Node* klass_node, Node* initial_test, | |
| 796 Node* count_val | |
| 797 ) | |
| 798 : AllocateNode(C, atype, ctrl, mem, abio, size, klass_node, | |
| 799 initial_test) | |
| 800 { | |
| 801 init_class_id(Class_AllocateArray); | |
| 802 set_req(AllocateNode::ALength, count_val); | |
| 803 } | |
| 804 virtual int Opcode() const; | |
| 805 virtual uint size_of() const; // Size is bigger | |
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806 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); |
| 0 | 807 |
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808 // Dig the length operand out of a array allocation site. |
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809 Node* Ideal_length() { |
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810 return in(AllocateNode::ALength); |
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811 } |
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812 |
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813 // Dig the length operand out of a array allocation site and narrow the |
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814 // type with a CastII, if necesssary |
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815 Node* make_ideal_length(const TypeOopPtr* ary_type, PhaseTransform *phase, bool can_create = true); |
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816 |
| 0 | 817 // Pattern-match a possible usage of AllocateArrayNode. |
| 818 // Return null if no allocation is recognized. | |
| 819 static AllocateArrayNode* Ideal_array_allocation(Node* ptr, PhaseTransform* phase) { | |
| 820 AllocateNode* allo = Ideal_allocation(ptr, phase); | |
| 821 return (allo == NULL || !allo->is_AllocateArray()) | |
| 822 ? NULL : allo->as_AllocateArray(); | |
| 823 } | |
| 824 }; | |
| 825 | |
| 826 //------------------------------AbstractLockNode----------------------------------- | |
| 827 class AbstractLockNode: public CallNode { | |
| 828 private: | |
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829 bool _eliminate; // indicates this lock can be safely eliminated |
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830 bool _coarsened; // indicates this lock was coarsened |
| 0 | 831 #ifndef PRODUCT |
| 832 NamedCounter* _counter; | |
| 833 #endif | |
| 834 | |
| 835 protected: | |
| 836 // helper functions for lock elimination | |
| 837 // | |
| 838 | |
| 839 bool find_matching_unlock(const Node* ctrl, LockNode* lock, | |
| 840 GrowableArray<AbstractLockNode*> &lock_ops); | |
| 841 bool find_lock_and_unlock_through_if(Node* node, LockNode* lock, | |
| 842 GrowableArray<AbstractLockNode*> &lock_ops); | |
| 843 bool find_unlocks_for_region(const RegionNode* region, LockNode* lock, | |
| 844 GrowableArray<AbstractLockNode*> &lock_ops); | |
| 845 LockNode *find_matching_lock(UnlockNode* unlock); | |
| 846 | |
| 847 | |
| 848 public: | |
| 849 AbstractLockNode(const TypeFunc *tf) | |
| 850 : CallNode(tf, NULL, TypeRawPtr::BOTTOM), | |
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851 _coarsened(false), |
| 0 | 852 _eliminate(false) |
| 853 { | |
| 854 #ifndef PRODUCT | |
| 855 _counter = NULL; | |
| 856 #endif | |
| 857 } | |
| 858 virtual int Opcode() const = 0; | |
| 859 Node * obj_node() const {return in(TypeFunc::Parms + 0); } | |
| 860 Node * box_node() const {return in(TypeFunc::Parms + 1); } | |
| 861 Node * fastlock_node() const {return in(TypeFunc::Parms + 2); } | |
| 862 const Type *sub(const Type *t1, const Type *t2) const { return TypeInt::CC;} | |
| 863 | |
| 864 virtual uint size_of() const { return sizeof(*this); } | |
| 865 | |
| 866 bool is_eliminated() {return _eliminate; } | |
| 867 // mark node as eliminated and update the counter if there is one | |
| 868 void set_eliminated(); | |
| 869 | |
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870 bool is_coarsened() { return _coarsened; } |
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871 void set_coarsened() { _coarsened = true; } |
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872 |
| 65 | 873 // locking does not modify its arguments |
| 874 virtual bool may_modify(const TypePtr *addr_t, PhaseTransform *phase){ return false;} | |
| 875 | |
| 0 | 876 #ifndef PRODUCT |
| 877 void create_lock_counter(JVMState* s); | |
| 878 NamedCounter* counter() const { return _counter; } | |
| 879 #endif | |
| 880 }; | |
| 881 | |
| 882 //------------------------------Lock--------------------------------------- | |
| 883 // High-level lock operation | |
| 884 // | |
| 885 // This is a subclass of CallNode because it is a macro node which gets expanded | |
| 886 // into a code sequence containing a call. This node takes 3 "parameters": | |
| 887 // 0 - object to lock | |
| 888 // 1 - a BoxLockNode | |
| 889 // 2 - a FastLockNode | |
| 890 // | |
| 891 class LockNode : public AbstractLockNode { | |
| 892 public: | |
| 893 | |
| 894 static const TypeFunc *lock_type() { | |
| 895 // create input type (domain) | |
| 896 const Type **fields = TypeTuple::fields(3); | |
| 897 fields[TypeFunc::Parms+0] = TypeInstPtr::NOTNULL; // Object to be Locked | |
| 898 fields[TypeFunc::Parms+1] = TypeRawPtr::BOTTOM; // Address of stack location for lock | |
| 899 fields[TypeFunc::Parms+2] = TypeInt::BOOL; // FastLock | |
| 900 const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+3,fields); | |
| 901 | |
| 902 // create result type (range) | |
| 903 fields = TypeTuple::fields(0); | |
| 904 | |
| 905 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+0,fields); | |
| 906 | |
| 907 return TypeFunc::make(domain,range); | |
| 908 } | |
| 909 | |
| 910 virtual int Opcode() const; | |
| 911 virtual uint size_of() const; // Size is bigger | |
| 912 LockNode(Compile* C, const TypeFunc *tf) : AbstractLockNode( tf ) { | |
| 913 init_class_id(Class_Lock); | |
| 914 init_flags(Flag_is_macro); | |
| 915 C->add_macro_node(this); | |
| 916 } | |
| 917 virtual bool guaranteed_safepoint() { return false; } | |
| 918 | |
| 919 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); | |
| 920 // Expansion modifies the JVMState, so we need to clone it | |
| 921 virtual void clone_jvms() { | |
| 922 set_jvms(jvms()->clone_deep(Compile::current())); | |
| 923 } | |
| 924 }; | |
| 925 | |
| 926 //------------------------------Unlock--------------------------------------- | |
| 927 // High-level unlock operation | |
| 928 class UnlockNode : public AbstractLockNode { | |
| 929 public: | |
| 930 virtual int Opcode() const; | |
| 931 virtual uint size_of() const; // Size is bigger | |
| 932 UnlockNode(Compile* C, const TypeFunc *tf) : AbstractLockNode( tf ) { | |
| 933 init_class_id(Class_Unlock); | |
| 934 init_flags(Flag_is_macro); | |
| 935 C->add_macro_node(this); | |
| 936 } | |
| 937 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); | |
| 938 // unlock is never a safepoint | |
| 939 virtual bool guaranteed_safepoint() { return false; } | |
| 940 }; |