Mercurial > hg > truffle
annotate src/share/vm/opto/callnode.cpp @ 1552:c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
Summary: Change all the Sun copyrights to Oracle copyright
Reviewed-by: ohair
| author | trims |
|---|---|
| date | Thu, 27 May 2010 19:08:38 -0700 |
| parents | 7c57aead6d3e |
| children | 60a14ad85270 |
| rev | line source |
|---|---|
| 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 #include "incls/_precompiled.incl" | |
| 30 #include "incls/_callnode.cpp.incl" | |
| 31 | |
| 32 //============================================================================= | |
| 33 uint StartNode::size_of() const { return sizeof(*this); } | |
| 34 uint StartNode::cmp( const Node &n ) const | |
| 35 { return _domain == ((StartNode&)n)._domain; } | |
| 36 const Type *StartNode::bottom_type() const { return _domain; } | |
| 37 const Type *StartNode::Value(PhaseTransform *phase) const { return _domain; } | |
| 38 #ifndef PRODUCT | |
| 39 void StartNode::dump_spec(outputStream *st) const { st->print(" #"); _domain->dump_on(st);} | |
| 40 #endif | |
| 41 | |
| 42 //------------------------------Ideal------------------------------------------ | |
| 43 Node *StartNode::Ideal(PhaseGVN *phase, bool can_reshape){ | |
| 44 return remove_dead_region(phase, can_reshape) ? this : NULL; | |
| 45 } | |
| 46 | |
| 47 //------------------------------calling_convention----------------------------- | |
| 48 void StartNode::calling_convention( BasicType* sig_bt, VMRegPair *parm_regs, uint argcnt ) const { | |
| 49 Matcher::calling_convention( sig_bt, parm_regs, argcnt, false ); | |
| 50 } | |
| 51 | |
| 52 //------------------------------Registers-------------------------------------- | |
| 53 const RegMask &StartNode::in_RegMask(uint) const { | |
| 54 return RegMask::Empty; | |
| 55 } | |
| 56 | |
| 57 //------------------------------match------------------------------------------ | |
| 58 // Construct projections for incoming parameters, and their RegMask info | |
| 59 Node *StartNode::match( const ProjNode *proj, const Matcher *match ) { | |
| 60 switch (proj->_con) { | |
| 61 case TypeFunc::Control: | |
| 62 case TypeFunc::I_O: | |
| 63 case TypeFunc::Memory: | |
| 64 return new (match->C, 1) MachProjNode(this,proj->_con,RegMask::Empty,MachProjNode::unmatched_proj); | |
| 65 case TypeFunc::FramePtr: | |
| 66 return new (match->C, 1) MachProjNode(this,proj->_con,Matcher::c_frame_ptr_mask, Op_RegP); | |
| 67 case TypeFunc::ReturnAdr: | |
| 68 return new (match->C, 1) MachProjNode(this,proj->_con,match->_return_addr_mask,Op_RegP); | |
| 69 case TypeFunc::Parms: | |
| 70 default: { | |
| 71 uint parm_num = proj->_con - TypeFunc::Parms; | |
| 72 const Type *t = _domain->field_at(proj->_con); | |
| 73 if (t->base() == Type::Half) // 2nd half of Longs and Doubles | |
| 74 return new (match->C, 1) ConNode(Type::TOP); | |
| 75 uint ideal_reg = Matcher::base2reg[t->base()]; | |
| 76 RegMask &rm = match->_calling_convention_mask[parm_num]; | |
| 77 return new (match->C, 1) MachProjNode(this,proj->_con,rm,ideal_reg); | |
| 78 } | |
| 79 } | |
| 80 return NULL; | |
| 81 } | |
| 82 | |
| 83 //------------------------------StartOSRNode---------------------------------- | |
| 84 // The method start node for an on stack replacement adapter | |
| 85 | |
| 86 //------------------------------osr_domain----------------------------- | |
| 87 const TypeTuple *StartOSRNode::osr_domain() { | |
| 88 const Type **fields = TypeTuple::fields(2); | |
| 89 fields[TypeFunc::Parms+0] = TypeRawPtr::BOTTOM; // address of osr buffer | |
| 90 | |
| 91 return TypeTuple::make(TypeFunc::Parms+1, fields); | |
| 92 } | |
| 93 | |
| 94 //============================================================================= | |
| 95 const char * const ParmNode::names[TypeFunc::Parms+1] = { | |
| 96 "Control", "I_O", "Memory", "FramePtr", "ReturnAdr", "Parms" | |
| 97 }; | |
| 98 | |
| 99 #ifndef PRODUCT | |
| 100 void ParmNode::dump_spec(outputStream *st) const { | |
| 101 if( _con < TypeFunc::Parms ) { | |
| 102 st->print(names[_con]); | |
| 103 } else { | |
| 104 st->print("Parm%d: ",_con-TypeFunc::Parms); | |
| 105 // Verbose and WizardMode dump bottom_type for all nodes | |
| 106 if( !Verbose && !WizardMode ) bottom_type()->dump_on(st); | |
| 107 } | |
| 108 } | |
| 109 #endif | |
| 110 | |
| 111 uint ParmNode::ideal_reg() const { | |
| 112 switch( _con ) { | |
| 113 case TypeFunc::Control : // fall through | |
| 114 case TypeFunc::I_O : // fall through | |
| 115 case TypeFunc::Memory : return 0; | |
| 116 case TypeFunc::FramePtr : // fall through | |
| 117 case TypeFunc::ReturnAdr: return Op_RegP; | |
| 118 default : assert( _con > TypeFunc::Parms, "" ); | |
| 119 // fall through | |
| 120 case TypeFunc::Parms : { | |
| 121 // Type of argument being passed | |
| 122 const Type *t = in(0)->as_Start()->_domain->field_at(_con); | |
| 123 return Matcher::base2reg[t->base()]; | |
| 124 } | |
| 125 } | |
| 126 ShouldNotReachHere(); | |
| 127 return 0; | |
| 128 } | |
| 129 | |
| 130 //============================================================================= | |
| 131 ReturnNode::ReturnNode(uint edges, Node *cntrl, Node *i_o, Node *memory, Node *frameptr, Node *retadr ) : Node(edges) { | |
| 132 init_req(TypeFunc::Control,cntrl); | |
| 133 init_req(TypeFunc::I_O,i_o); | |
| 134 init_req(TypeFunc::Memory,memory); | |
| 135 init_req(TypeFunc::FramePtr,frameptr); | |
| 136 init_req(TypeFunc::ReturnAdr,retadr); | |
| 137 } | |
| 138 | |
| 139 Node *ReturnNode::Ideal(PhaseGVN *phase, bool can_reshape){ | |
| 140 return remove_dead_region(phase, can_reshape) ? this : NULL; | |
| 141 } | |
| 142 | |
| 143 const Type *ReturnNode::Value( PhaseTransform *phase ) const { | |
| 144 return ( phase->type(in(TypeFunc::Control)) == Type::TOP) | |
| 145 ? Type::TOP | |
| 146 : Type::BOTTOM; | |
| 147 } | |
| 148 | |
| 149 // Do we Match on this edge index or not? No edges on return nodes | |
| 150 uint ReturnNode::match_edge(uint idx) const { | |
| 151 return 0; | |
| 152 } | |
| 153 | |
| 154 | |
| 155 #ifndef PRODUCT | |
| 156 void ReturnNode::dump_req() const { | |
| 157 // Dump the required inputs, enclosed in '(' and ')' | |
| 158 uint i; // Exit value of loop | |
| 159 for( i=0; i<req(); i++ ) { // For all required inputs | |
| 160 if( i == TypeFunc::Parms ) tty->print("returns"); | |
| 161 if( in(i) ) tty->print("%c%d ", Compile::current()->node_arena()->contains(in(i)) ? ' ' : 'o', in(i)->_idx); | |
| 162 else tty->print("_ "); | |
| 163 } | |
| 164 } | |
| 165 #endif | |
| 166 | |
| 167 //============================================================================= | |
| 168 RethrowNode::RethrowNode( | |
| 169 Node* cntrl, | |
| 170 Node* i_o, | |
| 171 Node* memory, | |
| 172 Node* frameptr, | |
| 173 Node* ret_adr, | |
| 174 Node* exception | |
| 175 ) : Node(TypeFunc::Parms + 1) { | |
| 176 init_req(TypeFunc::Control , cntrl ); | |
| 177 init_req(TypeFunc::I_O , i_o ); | |
| 178 init_req(TypeFunc::Memory , memory ); | |
| 179 init_req(TypeFunc::FramePtr , frameptr ); | |
| 180 init_req(TypeFunc::ReturnAdr, ret_adr); | |
| 181 init_req(TypeFunc::Parms , exception); | |
| 182 } | |
| 183 | |
| 184 Node *RethrowNode::Ideal(PhaseGVN *phase, bool can_reshape){ | |
| 185 return remove_dead_region(phase, can_reshape) ? this : NULL; | |
| 186 } | |
| 187 | |
| 188 const Type *RethrowNode::Value( PhaseTransform *phase ) const { | |
| 189 return (phase->type(in(TypeFunc::Control)) == Type::TOP) | |
| 190 ? Type::TOP | |
| 191 : Type::BOTTOM; | |
| 192 } | |
| 193 | |
| 194 uint RethrowNode::match_edge(uint idx) const { | |
| 195 return 0; | |
| 196 } | |
| 197 | |
| 198 #ifndef PRODUCT | |
| 199 void RethrowNode::dump_req() const { | |
| 200 // Dump the required inputs, enclosed in '(' and ')' | |
| 201 uint i; // Exit value of loop | |
| 202 for( i=0; i<req(); i++ ) { // For all required inputs | |
| 203 if( i == TypeFunc::Parms ) tty->print("exception"); | |
| 204 if( in(i) ) tty->print("%c%d ", Compile::current()->node_arena()->contains(in(i)) ? ' ' : 'o', in(i)->_idx); | |
| 205 else tty->print("_ "); | |
| 206 } | |
| 207 } | |
| 208 #endif | |
| 209 | |
| 210 //============================================================================= | |
| 211 // Do we Match on this edge index or not? Match only target address & method | |
| 212 uint TailCallNode::match_edge(uint idx) const { | |
| 213 return TypeFunc::Parms <= idx && idx <= TypeFunc::Parms+1; | |
| 214 } | |
| 215 | |
| 216 //============================================================================= | |
| 217 // Do we Match on this edge index or not? Match only target address & oop | |
| 218 uint TailJumpNode::match_edge(uint idx) const { | |
| 219 return TypeFunc::Parms <= idx && idx <= TypeFunc::Parms+1; | |
| 220 } | |
| 221 | |
| 222 //============================================================================= | |
| 223 JVMState::JVMState(ciMethod* method, JVMState* caller) { | |
| 224 assert(method != NULL, "must be valid call site"); | |
| 225 _method = method; | |
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226 _reexecute = Reexecute_Undefined; |
| 0 | 227 debug_only(_bci = -99); // random garbage value |
| 228 debug_only(_map = (SafePointNode*)-1); | |
| 229 _caller = caller; | |
| 230 _depth = 1 + (caller == NULL ? 0 : caller->depth()); | |
| 231 _locoff = TypeFunc::Parms; | |
| 232 _stkoff = _locoff + _method->max_locals(); | |
| 233 _monoff = _stkoff + _method->max_stack(); | |
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234 _scloff = _monoff; |
| 0 | 235 _endoff = _monoff; |
| 236 _sp = 0; | |
| 237 } | |
| 238 JVMState::JVMState(int stack_size) { | |
| 239 _method = NULL; | |
| 240 _bci = InvocationEntryBci; | |
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241 _reexecute = Reexecute_Undefined; |
| 0 | 242 debug_only(_map = (SafePointNode*)-1); |
| 243 _caller = NULL; | |
| 244 _depth = 1; | |
| 245 _locoff = TypeFunc::Parms; | |
| 246 _stkoff = _locoff; | |
| 247 _monoff = _stkoff + stack_size; | |
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248 _scloff = _monoff; |
| 0 | 249 _endoff = _monoff; |
| 250 _sp = 0; | |
| 251 } | |
| 252 | |
| 253 //--------------------------------of_depth------------------------------------- | |
| 254 JVMState* JVMState::of_depth(int d) const { | |
| 255 const JVMState* jvmp = this; | |
| 256 assert(0 < d && (uint)d <= depth(), "oob"); | |
| 257 for (int skip = depth() - d; skip > 0; skip--) { | |
| 258 jvmp = jvmp->caller(); | |
| 259 } | |
| 260 assert(jvmp->depth() == (uint)d, "found the right one"); | |
| 261 return (JVMState*)jvmp; | |
| 262 } | |
| 263 | |
| 264 //-----------------------------same_calls_as----------------------------------- | |
| 265 bool JVMState::same_calls_as(const JVMState* that) const { | |
| 266 if (this == that) return true; | |
| 267 if (this->depth() != that->depth()) return false; | |
| 268 const JVMState* p = this; | |
| 269 const JVMState* q = that; | |
| 270 for (;;) { | |
| 271 if (p->_method != q->_method) return false; | |
| 272 if (p->_method == NULL) return true; // bci is irrelevant | |
| 273 if (p->_bci != q->_bci) return false; | |
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274 if (p->_reexecute != q->_reexecute) return false; |
| 0 | 275 p = p->caller(); |
| 276 q = q->caller(); | |
| 277 if (p == q) return true; | |
| 278 assert(p != NULL && q != NULL, "depth check ensures we don't run off end"); | |
| 279 } | |
| 280 } | |
| 281 | |
| 282 //------------------------------debug_start------------------------------------ | |
| 283 uint JVMState::debug_start() const { | |
| 284 debug_only(JVMState* jvmroot = of_depth(1)); | |
| 285 assert(jvmroot->locoff() <= this->locoff(), "youngest JVMState must be last"); | |
| 286 return of_depth(1)->locoff(); | |
| 287 } | |
| 288 | |
| 289 //-------------------------------debug_end------------------------------------- | |
| 290 uint JVMState::debug_end() const { | |
| 291 debug_only(JVMState* jvmroot = of_depth(1)); | |
| 292 assert(jvmroot->endoff() <= this->endoff(), "youngest JVMState must be last"); | |
| 293 return endoff(); | |
| 294 } | |
| 295 | |
| 296 //------------------------------debug_depth------------------------------------ | |
| 297 uint JVMState::debug_depth() const { | |
| 298 uint total = 0; | |
| 299 for (const JVMState* jvmp = this; jvmp != NULL; jvmp = jvmp->caller()) { | |
| 300 total += jvmp->debug_size(); | |
| 301 } | |
| 302 return total; | |
| 303 } | |
| 304 | |
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305 #ifndef PRODUCT |
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306 |
| 0 | 307 //------------------------------format_helper---------------------------------- |
| 308 // Given an allocation (a Chaitin object) and a Node decide if the Node carries | |
| 309 // any defined value or not. If it does, print out the register or constant. | |
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310 static void format_helper( PhaseRegAlloc *regalloc, outputStream* st, Node *n, const char *msg, uint i, GrowableArray<SafePointScalarObjectNode*> *scobjs ) { |
| 0 | 311 if (n == NULL) { st->print(" NULL"); return; } |
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312 if (n->is_SafePointScalarObject()) { |
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313 // Scalar replacement. |
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314 SafePointScalarObjectNode* spobj = n->as_SafePointScalarObject(); |
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315 scobjs->append_if_missing(spobj); |
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316 int sco_n = scobjs->find(spobj); |
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317 assert(sco_n >= 0, ""); |
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318 st->print(" %s%d]=#ScObj" INT32_FORMAT, msg, i, sco_n); |
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319 return; |
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320 } |
| 0 | 321 if( OptoReg::is_valid(regalloc->get_reg_first(n))) { // Check for undefined |
| 322 char buf[50]; | |
| 323 regalloc->dump_register(n,buf); | |
| 324 st->print(" %s%d]=%s",msg,i,buf); | |
| 325 } else { // No register, but might be constant | |
| 326 const Type *t = n->bottom_type(); | |
| 327 switch (t->base()) { | |
| 328 case Type::Int: | |
| 329 st->print(" %s%d]=#"INT32_FORMAT,msg,i,t->is_int()->get_con()); | |
| 330 break; | |
| 331 case Type::AnyPtr: | |
| 332 assert( t == TypePtr::NULL_PTR, "" ); | |
| 333 st->print(" %s%d]=#NULL",msg,i); | |
| 334 break; | |
| 335 case Type::AryPtr: | |
| 336 case Type::KlassPtr: | |
| 337 case Type::InstPtr: | |
| 338 st->print(" %s%d]=#Ptr" INTPTR_FORMAT,msg,i,t->isa_oopptr()->const_oop()); | |
| 339 break; | |
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340 case Type::NarrowOop: |
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341 st->print(" %s%d]=#Ptr" INTPTR_FORMAT,msg,i,t->make_ptr()->isa_oopptr()->const_oop()); |
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342 break; |
| 0 | 343 case Type::RawPtr: |
| 344 st->print(" %s%d]=#Raw" INTPTR_FORMAT,msg,i,t->is_rawptr()); | |
| 345 break; | |
| 346 case Type::DoubleCon: | |
| 347 st->print(" %s%d]=#%fD",msg,i,t->is_double_constant()->_d); | |
| 348 break; | |
| 349 case Type::FloatCon: | |
| 350 st->print(" %s%d]=#%fF",msg,i,t->is_float_constant()->_f); | |
| 351 break; | |
| 352 case Type::Long: | |
| 353 st->print(" %s%d]=#"INT64_FORMAT,msg,i,t->is_long()->get_con()); | |
| 354 break; | |
| 355 case Type::Half: | |
| 356 case Type::Top: | |
| 357 st->print(" %s%d]=_",msg,i); | |
| 358 break; | |
| 359 default: ShouldNotReachHere(); | |
| 360 } | |
| 361 } | |
| 362 } | |
| 363 | |
| 364 //------------------------------format----------------------------------------- | |
| 365 void JVMState::format(PhaseRegAlloc *regalloc, const Node *n, outputStream* st) const { | |
| 366 st->print(" #"); | |
| 367 if( _method ) { | |
| 368 _method->print_short_name(st); | |
| 369 st->print(" @ bci:%d ",_bci); | |
| 370 } else { | |
| 371 st->print_cr(" runtime stub "); | |
| 372 return; | |
| 373 } | |
| 374 if (n->is_MachSafePoint()) { | |
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375 GrowableArray<SafePointScalarObjectNode*> scobjs; |
| 0 | 376 MachSafePointNode *mcall = n->as_MachSafePoint(); |
| 377 uint i; | |
| 378 // Print locals | |
| 379 for( i = 0; i < (uint)loc_size(); i++ ) | |
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380 format_helper( regalloc, st, mcall->local(this, i), "L[", i, &scobjs ); |
| 0 | 381 // Print stack |
| 382 for (i = 0; i < (uint)stk_size(); i++) { | |
| 383 if ((uint)(_stkoff + i) >= mcall->len()) | |
| 384 st->print(" oob "); | |
| 385 else | |
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386 format_helper( regalloc, st, mcall->stack(this, i), "STK[", i, &scobjs ); |
| 0 | 387 } |
| 388 for (i = 0; (int)i < nof_monitors(); i++) { | |
| 389 Node *box = mcall->monitor_box(this, i); | |
| 390 Node *obj = mcall->monitor_obj(this, i); | |
| 391 if ( OptoReg::is_valid(regalloc->get_reg_first(box)) ) { | |
| 392 while( !box->is_BoxLock() ) box = box->in(1); | |
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393 format_helper( regalloc, st, box, "MON-BOX[", i, &scobjs ); |
| 0 | 394 } else { |
| 395 OptoReg::Name box_reg = BoxLockNode::stack_slot(box); | |
| 396 st->print(" MON-BOX%d=%s+%d", | |
| 397 i, | |
| 398 OptoReg::regname(OptoReg::c_frame_pointer), | |
| 399 regalloc->reg2offset(box_reg)); | |
| 400 } | |
|
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401 const char* obj_msg = "MON-OBJ["; |
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402 if (EliminateLocks) { |
|
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403 while( !box->is_BoxLock() ) box = box->in(1); |
|
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404 if (box->as_BoxLock()->is_eliminated()) |
|
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405 obj_msg = "MON-OBJ(LOCK ELIMINATED)["; |
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406 } |
|
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407 format_helper( regalloc, st, obj, obj_msg, i, &scobjs ); |
|
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408 } |
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409 |
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410 for (i = 0; i < (uint)scobjs.length(); i++) { |
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411 // Scalar replaced objects. |
|
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412 st->print_cr(""); |
|
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413 st->print(" # ScObj" INT32_FORMAT " ", i); |
|
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414 SafePointScalarObjectNode* spobj = scobjs.at(i); |
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415 ciKlass* cik = spobj->bottom_type()->is_oopptr()->klass(); |
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416 assert(cik->is_instance_klass() || |
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417 cik->is_array_klass(), "Not supported allocation."); |
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418 ciInstanceKlass *iklass = NULL; |
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419 if (cik->is_instance_klass()) { |
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420 cik->print_name_on(st); |
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421 iklass = cik->as_instance_klass(); |
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422 } else if (cik->is_type_array_klass()) { |
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423 cik->as_array_klass()->base_element_type()->print_name_on(st); |
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424 st->print("[%d]", spobj->n_fields()); |
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425 } else if (cik->is_obj_array_klass()) { |
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426 ciKlass* cie = cik->as_obj_array_klass()->base_element_klass(); |
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427 if (cie->is_instance_klass()) { |
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428 cie->print_name_on(st); |
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429 } else if (cie->is_type_array_klass()) { |
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430 cie->as_array_klass()->base_element_type()->print_name_on(st); |
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431 } else { |
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432 ShouldNotReachHere(); |
|
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433 } |
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434 st->print("[%d]", spobj->n_fields()); |
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435 int ndim = cik->as_array_klass()->dimension() - 1; |
|
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436 while (ndim-- > 0) { |
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437 st->print("[]"); |
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438 } |
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439 } |
|
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440 st->print("={"); |
|
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441 uint nf = spobj->n_fields(); |
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442 if (nf > 0) { |
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443 uint first_ind = spobj->first_index(); |
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444 Node* fld_node = mcall->in(first_ind); |
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445 ciField* cifield; |
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446 if (iklass != NULL) { |
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447 st->print(" ["); |
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448 cifield = iklass->nonstatic_field_at(0); |
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449 cifield->print_name_on(st); |
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450 format_helper( regalloc, st, fld_node, ":", 0, &scobjs ); |
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451 } else { |
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452 format_helper( regalloc, st, fld_node, "[", 0, &scobjs ); |
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453 } |
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454 for (uint j = 1; j < nf; j++) { |
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455 fld_node = mcall->in(first_ind+j); |
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456 if (iklass != NULL) { |
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457 st->print(", ["); |
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458 cifield = iklass->nonstatic_field_at(j); |
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459 cifield->print_name_on(st); |
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460 format_helper( regalloc, st, fld_node, ":", j, &scobjs ); |
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461 } else { |
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462 format_helper( regalloc, st, fld_node, ", [", j, &scobjs ); |
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463 } |
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464 } |
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465 } |
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466 st->print(" }"); |
| 0 | 467 } |
| 468 } | |
| 469 st->print_cr(""); | |
| 470 if (caller() != NULL) caller()->format(regalloc, n, st); | |
| 471 } | |
| 472 | |
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473 |
| 0 | 474 void JVMState::dump_spec(outputStream *st) const { |
| 475 if (_method != NULL) { | |
| 476 bool printed = false; | |
| 477 if (!Verbose) { | |
| 478 // The JVMS dumps make really, really long lines. | |
| 479 // Take out the most boring parts, which are the package prefixes. | |
| 480 char buf[500]; | |
| 481 stringStream namest(buf, sizeof(buf)); | |
| 482 _method->print_short_name(&namest); | |
| 483 if (namest.count() < sizeof(buf)) { | |
| 484 const char* name = namest.base(); | |
| 485 if (name[0] == ' ') ++name; | |
| 486 const char* endcn = strchr(name, ':'); // end of class name | |
| 487 if (endcn == NULL) endcn = strchr(name, '('); | |
| 488 if (endcn == NULL) endcn = name + strlen(name); | |
| 489 while (endcn > name && endcn[-1] != '.' && endcn[-1] != '/') | |
| 490 --endcn; | |
| 491 st->print(" %s", endcn); | |
| 492 printed = true; | |
| 493 } | |
| 494 } | |
| 495 if (!printed) | |
| 496 _method->print_short_name(st); | |
| 497 st->print(" @ bci:%d",_bci); | |
|
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498 if(_reexecute == Reexecute_True) |
|
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499 st->print(" reexecute"); |
| 0 | 500 } else { |
| 501 st->print(" runtime stub"); | |
| 502 } | |
| 503 if (caller() != NULL) caller()->dump_spec(st); | |
| 504 } | |
| 505 | |
|
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506 |
| 0 | 507 void JVMState::dump_on(outputStream* st) const { |
| 508 if (_map && !((uintptr_t)_map & 1)) { | |
| 509 if (_map->len() > _map->req()) { // _map->has_exceptions() | |
| 510 Node* ex = _map->in(_map->req()); // _map->next_exception() | |
| 511 // skip the first one; it's already being printed | |
| 512 while (ex != NULL && ex->len() > ex->req()) { | |
| 513 ex = ex->in(ex->req()); // ex->next_exception() | |
| 514 ex->dump(1); | |
| 515 } | |
| 516 } | |
| 517 _map->dump(2); | |
| 518 } | |
|
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519 st->print("JVMS depth=%d loc=%d stk=%d mon=%d scalar=%d end=%d mondepth=%d sp=%d bci=%d reexecute=%s method=", |
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520 depth(), locoff(), stkoff(), monoff(), scloff(), endoff(), monitor_depth(), sp(), bci(), should_reexecute()?"true":"false"); |
| 0 | 521 if (_method == NULL) { |
| 522 st->print_cr("(none)"); | |
| 523 } else { | |
| 524 _method->print_name(st); | |
| 525 st->cr(); | |
| 526 if (bci() >= 0 && bci() < _method->code_size()) { | |
| 527 st->print(" bc: "); | |
| 528 _method->print_codes_on(bci(), bci()+1, st); | |
| 529 } | |
| 530 } | |
| 531 if (caller() != NULL) { | |
| 532 caller()->dump_on(st); | |
| 533 } | |
| 534 } | |
| 535 | |
| 536 // Extra way to dump a jvms from the debugger, | |
| 537 // to avoid a bug with C++ member function calls. | |
| 538 void dump_jvms(JVMState* jvms) { | |
| 539 jvms->dump(); | |
| 540 } | |
| 541 #endif | |
| 542 | |
| 543 //--------------------------clone_shallow-------------------------------------- | |
| 544 JVMState* JVMState::clone_shallow(Compile* C) const { | |
| 545 JVMState* n = has_method() ? new (C) JVMState(_method, _caller) : new (C) JVMState(0); | |
| 546 n->set_bci(_bci); | |
|
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547 n->_reexecute = _reexecute; |
| 0 | 548 n->set_locoff(_locoff); |
| 549 n->set_stkoff(_stkoff); | |
| 550 n->set_monoff(_monoff); | |
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551 n->set_scloff(_scloff); |
| 0 | 552 n->set_endoff(_endoff); |
| 553 n->set_sp(_sp); | |
| 554 n->set_map(_map); | |
| 555 return n; | |
| 556 } | |
| 557 | |
| 558 //---------------------------clone_deep---------------------------------------- | |
| 559 JVMState* JVMState::clone_deep(Compile* C) const { | |
| 560 JVMState* n = clone_shallow(C); | |
| 561 for (JVMState* p = n; p->_caller != NULL; p = p->_caller) { | |
| 562 p->_caller = p->_caller->clone_shallow(C); | |
| 563 } | |
| 564 assert(n->depth() == depth(), "sanity"); | |
| 565 assert(n->debug_depth() == debug_depth(), "sanity"); | |
| 566 return n; | |
| 567 } | |
| 568 | |
| 569 //============================================================================= | |
| 570 uint CallNode::cmp( const Node &n ) const | |
| 571 { return _tf == ((CallNode&)n)._tf && _jvms == ((CallNode&)n)._jvms; } | |
| 572 #ifndef PRODUCT | |
| 573 void CallNode::dump_req() const { | |
| 574 // Dump the required inputs, enclosed in '(' and ')' | |
| 575 uint i; // Exit value of loop | |
| 576 for( i=0; i<req(); i++ ) { // For all required inputs | |
| 577 if( i == TypeFunc::Parms ) tty->print("("); | |
| 578 if( in(i) ) tty->print("%c%d ", Compile::current()->node_arena()->contains(in(i)) ? ' ' : 'o', in(i)->_idx); | |
| 579 else tty->print("_ "); | |
| 580 } | |
| 581 tty->print(")"); | |
| 582 } | |
| 583 | |
| 584 void CallNode::dump_spec(outputStream *st) const { | |
| 585 st->print(" "); | |
| 586 tf()->dump_on(st); | |
| 587 if (_cnt != COUNT_UNKNOWN) st->print(" C=%f",_cnt); | |
| 588 if (jvms() != NULL) jvms()->dump_spec(st); | |
| 589 } | |
| 590 #endif | |
| 591 | |
| 592 const Type *CallNode::bottom_type() const { return tf()->range(); } | |
| 593 const Type *CallNode::Value(PhaseTransform *phase) const { | |
| 594 if (phase->type(in(0)) == Type::TOP) return Type::TOP; | |
| 595 return tf()->range(); | |
| 596 } | |
| 597 | |
| 598 //------------------------------calling_convention----------------------------- | |
| 599 void CallNode::calling_convention( BasicType* sig_bt, VMRegPair *parm_regs, uint argcnt ) const { | |
| 600 // Use the standard compiler calling convention | |
| 601 Matcher::calling_convention( sig_bt, parm_regs, argcnt, true ); | |
| 602 } | |
| 603 | |
| 604 | |
| 605 //------------------------------match------------------------------------------ | |
| 606 // Construct projections for control, I/O, memory-fields, ..., and | |
| 607 // return result(s) along with their RegMask info | |
| 608 Node *CallNode::match( const ProjNode *proj, const Matcher *match ) { | |
| 609 switch (proj->_con) { | |
| 610 case TypeFunc::Control: | |
| 611 case TypeFunc::I_O: | |
| 612 case TypeFunc::Memory: | |
| 613 return new (match->C, 1) MachProjNode(this,proj->_con,RegMask::Empty,MachProjNode::unmatched_proj); | |
| 614 | |
| 615 case TypeFunc::Parms+1: // For LONG & DOUBLE returns | |
| 616 assert(tf()->_range->field_at(TypeFunc::Parms+1) == Type::HALF, ""); | |
| 617 // 2nd half of doubles and longs | |
| 618 return new (match->C, 1) MachProjNode(this,proj->_con, RegMask::Empty, (uint)OptoReg::Bad); | |
| 619 | |
| 620 case TypeFunc::Parms: { // Normal returns | |
| 621 uint ideal_reg = Matcher::base2reg[tf()->range()->field_at(TypeFunc::Parms)->base()]; | |
| 622 OptoRegPair regs = is_CallRuntime() | |
| 623 ? match->c_return_value(ideal_reg,true) // Calls into C runtime | |
| 624 : match-> return_value(ideal_reg,true); // Calls into compiled Java code | |
| 625 RegMask rm = RegMask(regs.first()); | |
| 626 if( OptoReg::is_valid(regs.second()) ) | |
| 627 rm.Insert( regs.second() ); | |
| 628 return new (match->C, 1) MachProjNode(this,proj->_con,rm,ideal_reg); | |
| 629 } | |
| 630 | |
| 631 case TypeFunc::ReturnAdr: | |
| 632 case TypeFunc::FramePtr: | |
| 633 default: | |
| 634 ShouldNotReachHere(); | |
| 635 } | |
| 636 return NULL; | |
| 637 } | |
| 638 | |
| 639 // Do we Match on this edge index or not? Match no edges | |
| 640 uint CallNode::match_edge(uint idx) const { | |
| 641 return 0; | |
| 642 } | |
| 643 | |
| 65 | 644 // |
|
74
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645 // Determine whether the call could modify the field of the specified |
|
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646 // instance at the specified offset. |
| 65 | 647 // |
| 648 bool CallNode::may_modify(const TypePtr *addr_t, PhaseTransform *phase) { | |
| 649 const TypeOopPtr *adrInst_t = addr_t->isa_oopptr(); | |
| 650 | |
| 247 | 651 // If not an OopPtr or not an instance type, assume the worst. |
| 652 // Note: currently this method is called only for instance types. | |
| 653 if (adrInst_t == NULL || !adrInst_t->is_known_instance()) { | |
| 65 | 654 return true; |
| 655 } | |
| 247 | 656 // The instance_id is set only for scalar-replaceable allocations which |
| 657 // are not passed as arguments according to Escape Analysis. | |
| 65 | 658 return false; |
| 659 } | |
| 660 | |
| 661 // Does this call have a direct reference to n other than debug information? | |
| 662 bool CallNode::has_non_debug_use(Node *n) { | |
| 663 const TypeTuple * d = tf()->domain(); | |
| 664 for (uint i = TypeFunc::Parms; i < d->cnt(); i++) { | |
| 665 Node *arg = in(i); | |
| 666 if (arg == n) { | |
| 667 return true; | |
| 668 } | |
| 669 } | |
| 670 return false; | |
| 671 } | |
| 672 | |
| 673 // Returns the unique CheckCastPP of a call | |
| 674 // or 'this' if there are several CheckCastPP | |
| 675 // or returns NULL if there is no one. | |
| 676 Node *CallNode::result_cast() { | |
| 677 Node *cast = NULL; | |
| 678 | |
| 679 Node *p = proj_out(TypeFunc::Parms); | |
| 680 if (p == NULL) | |
| 681 return NULL; | |
| 682 | |
| 683 for (DUIterator_Fast imax, i = p->fast_outs(imax); i < imax; i++) { | |
| 684 Node *use = p->fast_out(i); | |
| 685 if (use->is_CheckCastPP()) { | |
| 686 if (cast != NULL) { | |
| 687 return this; // more than 1 CheckCastPP | |
| 688 } | |
| 689 cast = use; | |
| 690 } | |
| 691 } | |
| 692 return cast; | |
| 693 } | |
| 694 | |
| 695 | |
|
1080
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696 void CallNode::extract_projections(CallProjections* projs, bool separate_io_proj) { |
|
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697 projs->fallthrough_proj = NULL; |
|
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|
698 projs->fallthrough_catchproj = NULL; |
|
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|
699 projs->fallthrough_ioproj = NULL; |
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700 projs->catchall_ioproj = NULL; |
|
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701 projs->catchall_catchproj = NULL; |
|
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702 projs->fallthrough_memproj = NULL; |
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703 projs->catchall_memproj = NULL; |
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704 projs->resproj = NULL; |
|
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705 projs->exobj = NULL; |
|
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|
706 |
|
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|
707 for (DUIterator_Fast imax, i = fast_outs(imax); i < imax; i++) { |
|
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708 ProjNode *pn = fast_out(i)->as_Proj(); |
|
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|
709 if (pn->outcnt() == 0) continue; |
|
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|
710 switch (pn->_con) { |
|
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|
711 case TypeFunc::Control: |
|
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|
712 { |
|
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|
713 // For Control (fallthrough) and I_O (catch_all_index) we have CatchProj -> Catch -> Proj |
|
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714 projs->fallthrough_proj = pn; |
|
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|
715 DUIterator_Fast jmax, j = pn->fast_outs(jmax); |
|
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716 const Node *cn = pn->fast_out(j); |
|
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717 if (cn->is_Catch()) { |
|
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|
718 ProjNode *cpn = NULL; |
|
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719 for (DUIterator_Fast kmax, k = cn->fast_outs(kmax); k < kmax; k++) { |
|
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720 cpn = cn->fast_out(k)->as_Proj(); |
|
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721 assert(cpn->is_CatchProj(), "must be a CatchProjNode"); |
|
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722 if (cpn->_con == CatchProjNode::fall_through_index) |
|
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723 projs->fallthrough_catchproj = cpn; |
|
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|
724 else { |
|
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|
725 assert(cpn->_con == CatchProjNode::catch_all_index, "must be correct index."); |
|
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726 projs->catchall_catchproj = cpn; |
|
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|
727 } |
|
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|
728 } |
|
7c57aead6d3e
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|
729 } |
|
7c57aead6d3e
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|
730 break; |
|
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|
731 } |
|
7c57aead6d3e
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|
732 case TypeFunc::I_O: |
|
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|
733 if (pn->_is_io_use) |
|
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|
734 projs->catchall_ioproj = pn; |
|
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|
735 else |
|
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|
736 projs->fallthrough_ioproj = pn; |
|
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737 for (DUIterator j = pn->outs(); pn->has_out(j); j++) { |
|
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738 Node* e = pn->out(j); |
|
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739 if (e->Opcode() == Op_CreateEx && e->in(0)->is_CatchProj()) { |
|
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740 assert(projs->exobj == NULL, "only one"); |
|
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741 projs->exobj = e; |
|
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|
742 } |
|
7c57aead6d3e
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|
743 } |
|
7c57aead6d3e
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|
744 break; |
|
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|
745 case TypeFunc::Memory: |
|
7c57aead6d3e
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|
746 if (pn->_is_io_use) |
|
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|
747 projs->catchall_memproj = pn; |
|
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|
748 else |
|
7c57aead6d3e
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|
749 projs->fallthrough_memproj = pn; |
|
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|
750 break; |
|
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|
751 case TypeFunc::Parms: |
|
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|
752 projs->resproj = pn; |
|
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|
753 break; |
|
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|
754 default: |
|
7c57aead6d3e
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|
755 assert(false, "unexpected projection from allocation node."); |
|
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|
756 } |
|
7c57aead6d3e
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|
757 } |
|
7c57aead6d3e
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|
758 |
|
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|
759 // The resproj may not exist because the result couuld be ignored |
|
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|
760 // and the exception object may not exist if an exception handler |
|
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|
761 // swallows the exception but all the other must exist and be found. |
|
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|
762 assert(projs->fallthrough_proj != NULL, "must be found"); |
|
7c57aead6d3e
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|
763 assert(projs->fallthrough_catchproj != NULL, "must be found"); |
|
7c57aead6d3e
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|
764 assert(projs->fallthrough_memproj != NULL, "must be found"); |
|
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|
765 assert(projs->fallthrough_ioproj != NULL, "must be found"); |
|
7c57aead6d3e
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|
766 assert(projs->catchall_catchproj != NULL, "must be found"); |
|
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|
767 if (separate_io_proj) { |
|
7c57aead6d3e
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|
768 assert(projs->catchall_memproj != NULL, "must be found"); |
|
7c57aead6d3e
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|
769 assert(projs->catchall_ioproj != NULL, "must be found"); |
|
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|
770 } |
|
7c57aead6d3e
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|
771 } |
|
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|
772 |
|
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|
773 |
| 0 | 774 //============================================================================= |
| 775 uint CallJavaNode::size_of() const { return sizeof(*this); } | |
| 776 uint CallJavaNode::cmp( const Node &n ) const { | |
| 777 CallJavaNode &call = (CallJavaNode&)n; | |
| 778 return CallNode::cmp(call) && _method == call._method; | |
| 779 } | |
| 780 #ifndef PRODUCT | |
| 781 void CallJavaNode::dump_spec(outputStream *st) const { | |
| 782 if( _method ) _method->print_short_name(st); | |
| 783 CallNode::dump_spec(st); | |
| 784 } | |
| 785 #endif | |
| 786 | |
| 787 //============================================================================= | |
| 788 uint CallStaticJavaNode::size_of() const { return sizeof(*this); } | |
| 789 uint CallStaticJavaNode::cmp( const Node &n ) const { | |
| 790 CallStaticJavaNode &call = (CallStaticJavaNode&)n; | |
| 791 return CallJavaNode::cmp(call); | |
| 792 } | |
| 793 | |
| 794 //----------------------------uncommon_trap_request---------------------------- | |
| 795 // If this is an uncommon trap, return the request code, else zero. | |
| 796 int CallStaticJavaNode::uncommon_trap_request() const { | |
| 797 if (_name != NULL && !strcmp(_name, "uncommon_trap")) { | |
| 798 return extract_uncommon_trap_request(this); | |
| 799 } | |
| 800 return 0; | |
| 801 } | |
| 802 int CallStaticJavaNode::extract_uncommon_trap_request(const Node* call) { | |
| 803 #ifndef PRODUCT | |
| 804 if (!(call->req() > TypeFunc::Parms && | |
| 805 call->in(TypeFunc::Parms) != NULL && | |
| 806 call->in(TypeFunc::Parms)->is_Con())) { | |
| 807 assert(_in_dump_cnt != 0, "OK if dumping"); | |
| 808 tty->print("[bad uncommon trap]"); | |
| 809 return 0; | |
| 810 } | |
| 811 #endif | |
| 812 return call->in(TypeFunc::Parms)->bottom_type()->is_int()->get_con(); | |
| 813 } | |
| 814 | |
| 815 #ifndef PRODUCT | |
| 816 void CallStaticJavaNode::dump_spec(outputStream *st) const { | |
| 817 st->print("# Static "); | |
| 818 if (_name != NULL) { | |
| 819 st->print("%s", _name); | |
| 820 int trap_req = uncommon_trap_request(); | |
| 821 if (trap_req != 0) { | |
| 822 char buf[100]; | |
| 823 st->print("(%s)", | |
| 824 Deoptimization::format_trap_request(buf, sizeof(buf), | |
| 825 trap_req)); | |
| 826 } | |
| 827 st->print(" "); | |
| 828 } | |
| 829 CallJavaNode::dump_spec(st); | |
| 830 } | |
| 831 #endif | |
| 832 | |
| 833 //============================================================================= | |
| 834 uint CallDynamicJavaNode::size_of() const { return sizeof(*this); } | |
| 835 uint CallDynamicJavaNode::cmp( const Node &n ) const { | |
| 836 CallDynamicJavaNode &call = (CallDynamicJavaNode&)n; | |
| 837 return CallJavaNode::cmp(call); | |
| 838 } | |
| 839 #ifndef PRODUCT | |
| 840 void CallDynamicJavaNode::dump_spec(outputStream *st) const { | |
| 841 st->print("# Dynamic "); | |
| 842 CallJavaNode::dump_spec(st); | |
| 843 } | |
| 844 #endif | |
| 845 | |
| 846 //============================================================================= | |
| 847 uint CallRuntimeNode::size_of() const { return sizeof(*this); } | |
| 848 uint CallRuntimeNode::cmp( const Node &n ) const { | |
| 849 CallRuntimeNode &call = (CallRuntimeNode&)n; | |
| 850 return CallNode::cmp(call) && !strcmp(_name,call._name); | |
| 851 } | |
| 852 #ifndef PRODUCT | |
| 853 void CallRuntimeNode::dump_spec(outputStream *st) const { | |
| 854 st->print("# "); | |
| 855 st->print(_name); | |
| 856 CallNode::dump_spec(st); | |
| 857 } | |
| 858 #endif | |
| 859 | |
| 860 //------------------------------calling_convention----------------------------- | |
| 861 void CallRuntimeNode::calling_convention( BasicType* sig_bt, VMRegPair *parm_regs, uint argcnt ) const { | |
| 862 Matcher::c_calling_convention( sig_bt, parm_regs, argcnt ); | |
| 863 } | |
| 864 | |
| 865 //============================================================================= | |
| 866 //------------------------------calling_convention----------------------------- | |
| 867 | |
| 868 | |
| 869 //============================================================================= | |
| 870 #ifndef PRODUCT | |
| 871 void CallLeafNode::dump_spec(outputStream *st) const { | |
| 872 st->print("# "); | |
| 873 st->print(_name); | |
| 874 CallNode::dump_spec(st); | |
| 875 } | |
| 876 #endif | |
| 877 | |
| 878 //============================================================================= | |
| 879 | |
| 880 void SafePointNode::set_local(JVMState* jvms, uint idx, Node *c) { | |
| 881 assert(verify_jvms(jvms), "jvms must match"); | |
| 882 int loc = jvms->locoff() + idx; | |
| 883 if (in(loc)->is_top() && idx > 0 && !c->is_top() ) { | |
| 884 // If current local idx is top then local idx - 1 could | |
| 885 // be a long/double that needs to be killed since top could | |
| 886 // represent the 2nd half ofthe long/double. | |
| 887 uint ideal = in(loc -1)->ideal_reg(); | |
| 888 if (ideal == Op_RegD || ideal == Op_RegL) { | |
| 889 // set other (low index) half to top | |
| 890 set_req(loc - 1, in(loc)); | |
| 891 } | |
| 892 } | |
| 893 set_req(loc, c); | |
| 894 } | |
| 895 | |
| 896 uint SafePointNode::size_of() const { return sizeof(*this); } | |
| 897 uint SafePointNode::cmp( const Node &n ) const { | |
| 898 return (&n == this); // Always fail except on self | |
| 899 } | |
| 900 | |
| 901 //-------------------------set_next_exception---------------------------------- | |
| 902 void SafePointNode::set_next_exception(SafePointNode* n) { | |
| 903 assert(n == NULL || n->Opcode() == Op_SafePoint, "correct value for next_exception"); | |
| 904 if (len() == req()) { | |
| 905 if (n != NULL) add_prec(n); | |
| 906 } else { | |
| 907 set_prec(req(), n); | |
| 908 } | |
| 909 } | |
| 910 | |
| 911 | |
| 912 //----------------------------next_exception----------------------------------- | |
| 913 SafePointNode* SafePointNode::next_exception() const { | |
| 914 if (len() == req()) { | |
| 915 return NULL; | |
| 916 } else { | |
| 917 Node* n = in(req()); | |
| 918 assert(n == NULL || n->Opcode() == Op_SafePoint, "no other uses of prec edges"); | |
| 919 return (SafePointNode*) n; | |
| 920 } | |
| 921 } | |
| 922 | |
| 923 | |
| 924 //------------------------------Ideal------------------------------------------ | |
| 925 // Skip over any collapsed Regions | |
| 926 Node *SafePointNode::Ideal(PhaseGVN *phase, bool can_reshape) { | |
| 305 | 927 return remove_dead_region(phase, can_reshape) ? this : NULL; |
| 0 | 928 } |
| 929 | |
| 930 //------------------------------Identity--------------------------------------- | |
| 931 // Remove obviously duplicate safepoints | |
| 932 Node *SafePointNode::Identity( PhaseTransform *phase ) { | |
| 933 | |
| 934 // If you have back to back safepoints, remove one | |
| 935 if( in(TypeFunc::Control)->is_SafePoint() ) | |
| 936 return in(TypeFunc::Control); | |
| 937 | |
| 938 if( in(0)->is_Proj() ) { | |
| 939 Node *n0 = in(0)->in(0); | |
| 940 // Check if he is a call projection (except Leaf Call) | |
| 941 if( n0->is_Catch() ) { | |
| 942 n0 = n0->in(0)->in(0); | |
| 943 assert( n0->is_Call(), "expect a call here" ); | |
| 944 } | |
| 945 if( n0->is_Call() && n0->as_Call()->guaranteed_safepoint() ) { | |
| 946 // Useless Safepoint, so remove it | |
| 947 return in(TypeFunc::Control); | |
| 948 } | |
| 949 } | |
| 950 | |
| 951 return this; | |
| 952 } | |
| 953 | |
| 954 //------------------------------Value------------------------------------------ | |
| 955 const Type *SafePointNode::Value( PhaseTransform *phase ) const { | |
| 956 if( phase->type(in(0)) == Type::TOP ) return Type::TOP; | |
| 957 if( phase->eqv( in(0), this ) ) return Type::TOP; // Dead infinite loop | |
| 958 return Type::CONTROL; | |
| 959 } | |
| 960 | |
| 961 #ifndef PRODUCT | |
| 962 void SafePointNode::dump_spec(outputStream *st) const { | |
| 963 st->print(" SafePoint "); | |
| 964 } | |
| 965 #endif | |
| 966 | |
| 967 const RegMask &SafePointNode::in_RegMask(uint idx) const { | |
| 968 if( idx < TypeFunc::Parms ) return RegMask::Empty; | |
| 969 // Values outside the domain represent debug info | |
| 970 return *(Compile::current()->matcher()->idealreg2debugmask[in(idx)->ideal_reg()]); | |
| 971 } | |
| 972 const RegMask &SafePointNode::out_RegMask() const { | |
| 973 return RegMask::Empty; | |
| 974 } | |
| 975 | |
| 976 | |
| 977 void SafePointNode::grow_stack(JVMState* jvms, uint grow_by) { | |
| 978 assert((int)grow_by > 0, "sanity"); | |
| 979 int monoff = jvms->monoff(); | |
|
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980 int scloff = jvms->scloff(); |
| 0 | 981 int endoff = jvms->endoff(); |
| 982 assert(endoff == (int)req(), "no other states or debug info after me"); | |
| 983 Node* top = Compile::current()->top(); | |
| 984 for (uint i = 0; i < grow_by; i++) { | |
| 985 ins_req(monoff, top); | |
| 986 } | |
| 987 jvms->set_monoff(monoff + grow_by); | |
|
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988 jvms->set_scloff(scloff + grow_by); |
| 0 | 989 jvms->set_endoff(endoff + grow_by); |
| 990 } | |
| 991 | |
| 992 void SafePointNode::push_monitor(const FastLockNode *lock) { | |
| 993 // Add a LockNode, which points to both the original BoxLockNode (the | |
| 994 // stack space for the monitor) and the Object being locked. | |
| 995 const int MonitorEdges = 2; | |
| 996 assert(JVMState::logMonitorEdges == exact_log2(MonitorEdges), "correct MonitorEdges"); | |
| 997 assert(req() == jvms()->endoff(), "correct sizing"); | |
|
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998 int nextmon = jvms()->scloff(); |
| 0 | 999 if (GenerateSynchronizationCode) { |
| 1000 add_req(lock->box_node()); | |
| 1001 add_req(lock->obj_node()); | |
| 1002 } else { | |
|
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1003 Node* top = Compile::current()->top(); |
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1004 add_req(top); |
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1005 add_req(top); |
| 0 | 1006 } |
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1007 jvms()->set_scloff(nextmon+MonitorEdges); |
| 0 | 1008 jvms()->set_endoff(req()); |
| 1009 } | |
| 1010 | |
| 1011 void SafePointNode::pop_monitor() { | |
| 1012 // Delete last monitor from debug info | |
| 1013 debug_only(int num_before_pop = jvms()->nof_monitors()); | |
| 1014 const int MonitorEdges = (1<<JVMState::logMonitorEdges); | |
|
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1015 int scloff = jvms()->scloff(); |
| 0 | 1016 int endoff = jvms()->endoff(); |
|
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1017 int new_scloff = scloff - MonitorEdges; |
| 0 | 1018 int new_endoff = endoff - MonitorEdges; |
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1019 jvms()->set_scloff(new_scloff); |
| 0 | 1020 jvms()->set_endoff(new_endoff); |
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1021 while (scloff > new_scloff) del_req(--scloff); |
| 0 | 1022 assert(jvms()->nof_monitors() == num_before_pop-1, ""); |
| 1023 } | |
| 1024 | |
| 1025 Node *SafePointNode::peek_monitor_box() const { | |
| 1026 int mon = jvms()->nof_monitors() - 1; | |
| 1027 assert(mon >= 0, "most have a monitor"); | |
| 1028 return monitor_box(jvms(), mon); | |
| 1029 } | |
| 1030 | |
| 1031 Node *SafePointNode::peek_monitor_obj() const { | |
| 1032 int mon = jvms()->nof_monitors() - 1; | |
| 1033 assert(mon >= 0, "most have a monitor"); | |
| 1034 return monitor_obj(jvms(), mon); | |
| 1035 } | |
| 1036 | |
| 1037 // Do we Match on this edge index or not? Match no edges | |
| 1038 uint SafePointNode::match_edge(uint idx) const { | |
| 1039 if( !needs_polling_address_input() ) | |
| 1040 return 0; | |
| 1041 | |
| 1042 return (TypeFunc::Parms == idx); | |
| 1043 } | |
| 1044 | |
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1045 //============== SafePointScalarObjectNode ============== |
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1046 |
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1047 SafePointScalarObjectNode::SafePointScalarObjectNode(const TypeOopPtr* tp, |
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1048 #ifdef ASSERT |
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1049 AllocateNode* alloc, |
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1050 #endif |
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1051 uint first_index, |
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1052 uint n_fields) : |
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1053 TypeNode(tp, 1), // 1 control input -- seems required. Get from root. |
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1054 #ifdef ASSERT |
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1055 _alloc(alloc), |
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1056 #endif |
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1057 _first_index(first_index), |
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1058 _n_fields(n_fields) |
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1059 { |
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1060 init_class_id(Class_SafePointScalarObject); |
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1061 } |
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1062 |
|
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1063 bool SafePointScalarObjectNode::pinned() const { return true; } |
|
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1064 bool SafePointScalarObjectNode::depends_only_on_test() const { return false; } |
|
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1065 |
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1066 uint SafePointScalarObjectNode::ideal_reg() const { |
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1067 return 0; // No matching to machine instruction |
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1068 } |
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1069 |
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1070 const RegMask &SafePointScalarObjectNode::in_RegMask(uint idx) const { |
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1071 return *(Compile::current()->matcher()->idealreg2debugmask[in(idx)->ideal_reg()]); |
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1072 } |
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1073 |
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1074 const RegMask &SafePointScalarObjectNode::out_RegMask() const { |
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1075 return RegMask::Empty; |
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1076 } |
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1077 |
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1078 uint SafePointScalarObjectNode::match_edge(uint idx) const { |
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1079 return 0; |
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1080 } |
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1081 |
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1082 SafePointScalarObjectNode* |
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1083 SafePointScalarObjectNode::clone(int jvms_adj, Dict* sosn_map) const { |
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1084 void* cached = (*sosn_map)[(void*)this]; |
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1085 if (cached != NULL) { |
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1086 return (SafePointScalarObjectNode*)cached; |
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1087 } |
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1088 Compile* C = Compile::current(); |
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1089 SafePointScalarObjectNode* res = (SafePointScalarObjectNode*)Node::clone(); |
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1090 res->_first_index += jvms_adj; |
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1091 sosn_map->Insert((void*)this, (void*)res); |
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1092 return res; |
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1093 } |
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1094 |
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1095 |
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1096 #ifndef PRODUCT |
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1097 void SafePointScalarObjectNode::dump_spec(outputStream *st) const { |
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1098 st->print(" # fields@[%d..%d]", first_index(), |
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1099 first_index() + n_fields() - 1); |
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1100 } |
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1101 |
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1102 #endif |
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1103 |
| 0 | 1104 //============================================================================= |
| 1105 uint AllocateNode::size_of() const { return sizeof(*this); } | |
| 1106 | |
| 1107 AllocateNode::AllocateNode(Compile* C, const TypeFunc *atype, | |
| 1108 Node *ctrl, Node *mem, Node *abio, | |
| 1109 Node *size, Node *klass_node, Node *initial_test) | |
| 1110 : CallNode(atype, NULL, TypeRawPtr::BOTTOM) | |
| 1111 { | |
| 1112 init_class_id(Class_Allocate); | |
| 1113 init_flags(Flag_is_macro); | |
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1114 _is_scalar_replaceable = false; |
| 0 | 1115 Node *topnode = C->top(); |
| 1116 | |
| 1117 init_req( TypeFunc::Control , ctrl ); | |
| 1118 init_req( TypeFunc::I_O , abio ); | |
| 1119 init_req( TypeFunc::Memory , mem ); | |
| 1120 init_req( TypeFunc::ReturnAdr, topnode ); | |
| 1121 init_req( TypeFunc::FramePtr , topnode ); | |
| 1122 init_req( AllocSize , size); | |
| 1123 init_req( KlassNode , klass_node); | |
| 1124 init_req( InitialTest , initial_test); | |
| 1125 init_req( ALength , topnode); | |
| 1126 C->add_macro_node(this); | |
| 1127 } | |
| 1128 | |
| 1129 //============================================================================= | |
| 1130 uint AllocateArrayNode::size_of() const { return sizeof(*this); } | |
| 1131 | |
|
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1132 Node* AllocateArrayNode::Ideal(PhaseGVN *phase, bool can_reshape) { |
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1133 if (remove_dead_region(phase, can_reshape)) return this; |
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1134 |
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1135 const Type* type = phase->type(Ideal_length()); |
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1136 if (type->isa_int() && type->is_int()->_hi < 0) { |
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1137 if (can_reshape) { |
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1138 PhaseIterGVN *igvn = phase->is_IterGVN(); |
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1139 // Unreachable fall through path (negative array length), |
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1140 // the allocation can only throw so disconnect it. |
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1141 Node* proj = proj_out(TypeFunc::Control); |
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1142 Node* catchproj = NULL; |
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1143 if (proj != NULL) { |
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1144 for (DUIterator_Fast imax, i = proj->fast_outs(imax); i < imax; i++) { |
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1145 Node *cn = proj->fast_out(i); |
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1146 if (cn->is_Catch()) { |
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1147 catchproj = cn->as_Multi()->proj_out(CatchProjNode::fall_through_index); |
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1148 break; |
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1149 } |
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1150 } |
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1151 } |
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1152 if (catchproj != NULL && catchproj->outcnt() > 0 && |
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1153 (catchproj->outcnt() > 1 || |
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1154 catchproj->unique_out()->Opcode() != Op_Halt)) { |
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1155 assert(catchproj->is_CatchProj(), "must be a CatchProjNode"); |
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1156 Node* nproj = catchproj->clone(); |
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1157 igvn->register_new_node_with_optimizer(nproj); |
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1158 |
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1159 Node *frame = new (phase->C, 1) ParmNode( phase->C->start(), TypeFunc::FramePtr ); |
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1160 frame = phase->transform(frame); |
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1161 // Halt & Catch Fire |
|
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1162 Node *halt = new (phase->C, TypeFunc::Parms) HaltNode( nproj, frame ); |
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1163 phase->C->root()->add_req(halt); |
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1164 phase->transform(halt); |
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1165 |
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1166 igvn->replace_node(catchproj, phase->C->top()); |
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1167 return this; |
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1168 } |
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1169 } else { |
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1170 // Can't correct it during regular GVN so register for IGVN |
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1171 phase->C->record_for_igvn(this); |
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1172 } |
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1173 } |
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1174 return NULL; |
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1175 } |
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1176 |
|
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1177 // Retrieve the length from the AllocateArrayNode. Narrow the type with a |
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1178 // CastII, if appropriate. If we are not allowed to create new nodes, and |
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1179 // a CastII is appropriate, return NULL. |
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1180 Node *AllocateArrayNode::make_ideal_length(const TypeOopPtr* oop_type, PhaseTransform *phase, bool allow_new_nodes) { |
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1181 Node *length = in(AllocateNode::ALength); |
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1182 assert(length != NULL, "length is not null"); |
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1183 |
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1184 const TypeInt* length_type = phase->find_int_type(length); |
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1185 const TypeAryPtr* ary_type = oop_type->isa_aryptr(); |
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1186 |
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1187 if (ary_type != NULL && length_type != NULL) { |
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1188 const TypeInt* narrow_length_type = ary_type->narrow_size_type(length_type); |
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1189 if (narrow_length_type != length_type) { |
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1190 // Assert one of: |
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1191 // - the narrow_length is 0 |
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1192 // - the narrow_length is not wider than length |
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1193 assert(narrow_length_type == TypeInt::ZERO || |
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1194 (narrow_length_type->_hi <= length_type->_hi && |
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1195 narrow_length_type->_lo >= length_type->_lo), |
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1196 "narrow type must be narrower than length type"); |
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1197 |
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1198 // Return NULL if new nodes are not allowed |
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1199 if (!allow_new_nodes) return NULL; |
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1200 // Create a cast which is control dependent on the initialization to |
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1201 // propagate the fact that the array length must be positive. |
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1202 length = new (phase->C, 2) CastIINode(length, narrow_length_type); |
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1203 length->set_req(0, initialization()->proj_out(0)); |
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1204 } |
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1205 } |
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1206 |
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1207 return length; |
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1208 } |
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1209 |
| 0 | 1210 //============================================================================= |
| 1211 uint LockNode::size_of() const { return sizeof(*this); } | |
| 1212 | |
| 1213 // Redundant lock elimination | |
| 1214 // | |
| 1215 // There are various patterns of locking where we release and | |
| 1216 // immediately reacquire a lock in a piece of code where no operations | |
| 1217 // occur in between that would be observable. In those cases we can | |
| 1218 // skip releasing and reacquiring the lock without violating any | |
| 1219 // fairness requirements. Doing this around a loop could cause a lock | |
| 1220 // to be held for a very long time so we concentrate on non-looping | |
| 1221 // control flow. We also require that the operations are fully | |
| 1222 // redundant meaning that we don't introduce new lock operations on | |
| 1223 // some paths so to be able to eliminate it on others ala PRE. This | |
| 1224 // would probably require some more extensive graph manipulation to | |
| 1225 // guarantee that the memory edges were all handled correctly. | |
| 1226 // | |
| 1227 // Assuming p is a simple predicate which can't trap in any way and s | |
| 1228 // is a synchronized method consider this code: | |
| 1229 // | |
| 1230 // s(); | |
| 1231 // if (p) | |
| 1232 // s(); | |
| 1233 // else | |
| 1234 // s(); | |
| 1235 // s(); | |
| 1236 // | |
| 1237 // 1. The unlocks of the first call to s can be eliminated if the | |
| 1238 // locks inside the then and else branches are eliminated. | |
| 1239 // | |
| 1240 // 2. The unlocks of the then and else branches can be eliminated if | |
| 1241 // the lock of the final call to s is eliminated. | |
| 1242 // | |
| 1243 // Either of these cases subsumes the simple case of sequential control flow | |
| 1244 // | |
| 1245 // Addtionally we can eliminate versions without the else case: | |
| 1246 // | |
| 1247 // s(); | |
| 1248 // if (p) | |
| 1249 // s(); | |
| 1250 // s(); | |
| 1251 // | |
| 1252 // 3. In this case we eliminate the unlock of the first s, the lock | |
| 1253 // and unlock in the then case and the lock in the final s. | |
| 1254 // | |
| 1255 // Note also that in all these cases the then/else pieces don't have | |
| 1256 // to be trivial as long as they begin and end with synchronization | |
| 1257 // operations. | |
| 1258 // | |
| 1259 // s(); | |
| 1260 // if (p) | |
| 1261 // s(); | |
| 1262 // f(); | |
| 1263 // s(); | |
| 1264 // s(); | |
| 1265 // | |
| 1266 // The code will work properly for this case, leaving in the unlock | |
| 1267 // before the call to f and the relock after it. | |
| 1268 // | |
| 1269 // A potentially interesting case which isn't handled here is when the | |
| 1270 // locking is partially redundant. | |
| 1271 // | |
| 1272 // s(); | |
| 1273 // if (p) | |
| 1274 // s(); | |
| 1275 // | |
| 1276 // This could be eliminated putting unlocking on the else case and | |
| 1277 // eliminating the first unlock and the lock in the then side. | |
| 1278 // Alternatively the unlock could be moved out of the then side so it | |
| 1279 // was after the merge and the first unlock and second lock | |
| 1280 // eliminated. This might require less manipulation of the memory | |
| 1281 // state to get correct. | |
| 1282 // | |
| 1283 // Additionally we might allow work between a unlock and lock before | |
| 1284 // giving up eliminating the locks. The current code disallows any | |
| 1285 // conditional control flow between these operations. A formulation | |
| 1286 // similar to partial redundancy elimination computing the | |
| 1287 // availability of unlocking and the anticipatability of locking at a | |
| 1288 // program point would allow detection of fully redundant locking with | |
| 1289 // some amount of work in between. I'm not sure how often I really | |
| 1290 // think that would occur though. Most of the cases I've seen | |
| 1291 // indicate it's likely non-trivial work would occur in between. | |
| 1292 // There may be other more complicated constructs where we could | |
| 1293 // eliminate locking but I haven't seen any others appear as hot or | |
| 1294 // interesting. | |
| 1295 // | |
| 1296 // Locking and unlocking have a canonical form in ideal that looks | |
| 1297 // roughly like this: | |
| 1298 // | |
| 1299 // <obj> | |
| 1300 // | \\------+ | |
| 1301 // | \ \ | |
| 1302 // | BoxLock \ | |
| 1303 // | | | \ | |
| 1304 // | | \ \ | |
| 1305 // | | FastLock | |
| 1306 // | | / | |
| 1307 // | | / | |
| 1308 // | | | | |
| 1309 // | |
| 1310 // Lock | |
| 1311 // | | |
| 1312 // Proj #0 | |
| 1313 // | | |
| 1314 // MembarAcquire | |
| 1315 // | | |
| 1316 // Proj #0 | |
| 1317 // | |
| 1318 // MembarRelease | |
| 1319 // | | |
| 1320 // Proj #0 | |
| 1321 // | | |
| 1322 // Unlock | |
| 1323 // | | |
| 1324 // Proj #0 | |
| 1325 // | |
| 1326 // | |
| 1327 // This code proceeds by processing Lock nodes during PhaseIterGVN | |
| 1328 // and searching back through its control for the proper code | |
| 1329 // patterns. Once it finds a set of lock and unlock operations to | |
| 1330 // eliminate they are marked as eliminatable which causes the | |
| 1331 // expansion of the Lock and Unlock macro nodes to make the operation a NOP | |
| 1332 // | |
| 1333 //============================================================================= | |
| 1334 | |
| 1335 // | |
| 1336 // Utility function to skip over uninteresting control nodes. Nodes skipped are: | |
| 1337 // - copy regions. (These may not have been optimized away yet.) | |
| 1338 // - eliminated locking nodes | |
| 1339 // | |
| 1340 static Node *next_control(Node *ctrl) { | |
| 1341 if (ctrl == NULL) | |
| 1342 return NULL; | |
| 1343 while (1) { | |
| 1344 if (ctrl->is_Region()) { | |
| 1345 RegionNode *r = ctrl->as_Region(); | |
| 1346 Node *n = r->is_copy(); | |
| 1347 if (n == NULL) | |
| 1348 break; // hit a region, return it | |
| 1349 else | |
| 1350 ctrl = n; | |
| 1351 } else if (ctrl->is_Proj()) { | |
| 1352 Node *in0 = ctrl->in(0); | |
| 1353 if (in0->is_AbstractLock() && in0->as_AbstractLock()->is_eliminated()) { | |
| 1354 ctrl = in0->in(0); | |
| 1355 } else { | |
| 1356 break; | |
| 1357 } | |
| 1358 } else { | |
| 1359 break; // found an interesting control | |
| 1360 } | |
| 1361 } | |
| 1362 return ctrl; | |
| 1363 } | |
| 1364 // | |
| 1365 // Given a control, see if it's the control projection of an Unlock which | |
| 1366 // operating on the same object as lock. | |
| 1367 // | |
| 1368 bool AbstractLockNode::find_matching_unlock(const Node* ctrl, LockNode* lock, | |
| 1369 GrowableArray<AbstractLockNode*> &lock_ops) { | |
| 1370 ProjNode *ctrl_proj = (ctrl->is_Proj()) ? ctrl->as_Proj() : NULL; | |
| 1371 if (ctrl_proj != NULL && ctrl_proj->_con == TypeFunc::Control) { | |
| 1372 Node *n = ctrl_proj->in(0); | |
| 1373 if (n != NULL && n->is_Unlock()) { | |
| 1374 UnlockNode *unlock = n->as_Unlock(); | |
| 1375 if ((lock->obj_node() == unlock->obj_node()) && | |
| 1376 (lock->box_node() == unlock->box_node()) && !unlock->is_eliminated()) { | |
| 1377 lock_ops.append(unlock); | |
| 1378 return true; | |
| 1379 } | |
| 1380 } | |
| 1381 } | |
| 1382 return false; | |
| 1383 } | |
| 1384 | |
| 1385 // | |
| 1386 // Find the lock matching an unlock. Returns null if a safepoint | |
| 1387 // or complicated control is encountered first. | |
| 1388 LockNode *AbstractLockNode::find_matching_lock(UnlockNode* unlock) { | |
| 1389 LockNode *lock_result = NULL; | |
| 1390 // find the matching lock, or an intervening safepoint | |
| 1391 Node *ctrl = next_control(unlock->in(0)); | |
| 1392 while (1) { | |
| 1393 assert(ctrl != NULL, "invalid control graph"); | |
| 1394 assert(!ctrl->is_Start(), "missing lock for unlock"); | |
| 1395 if (ctrl->is_top()) break; // dead control path | |
| 1396 if (ctrl->is_Proj()) ctrl = ctrl->in(0); | |
| 1397 if (ctrl->is_SafePoint()) { | |
| 1398 break; // found a safepoint (may be the lock we are searching for) | |
| 1399 } else if (ctrl->is_Region()) { | |
| 1400 // Check for a simple diamond pattern. Punt on anything more complicated | |
| 1401 if (ctrl->req() == 3 && ctrl->in(1) != NULL && ctrl->in(2) != NULL) { | |
| 1402 Node *in1 = next_control(ctrl->in(1)); | |
| 1403 Node *in2 = next_control(ctrl->in(2)); | |
| 1404 if (((in1->is_IfTrue() && in2->is_IfFalse()) || | |
| 1405 (in2->is_IfTrue() && in1->is_IfFalse())) && (in1->in(0) == in2->in(0))) { | |
| 1406 ctrl = next_control(in1->in(0)->in(0)); | |
| 1407 } else { | |
| 1408 break; | |
| 1409 } | |
| 1410 } else { | |
| 1411 break; | |
| 1412 } | |
| 1413 } else { | |
| 1414 ctrl = next_control(ctrl->in(0)); // keep searching | |
| 1415 } | |
| 1416 } | |
| 1417 if (ctrl->is_Lock()) { | |
| 1418 LockNode *lock = ctrl->as_Lock(); | |
| 1419 if ((lock->obj_node() == unlock->obj_node()) && | |
| 1420 (lock->box_node() == unlock->box_node())) { | |
| 1421 lock_result = lock; | |
| 1422 } | |
| 1423 } | |
| 1424 return lock_result; | |
| 1425 } | |
| 1426 | |
| 1427 // This code corresponds to case 3 above. | |
| 1428 | |
| 1429 bool AbstractLockNode::find_lock_and_unlock_through_if(Node* node, LockNode* lock, | |
| 1430 GrowableArray<AbstractLockNode*> &lock_ops) { | |
| 1431 Node* if_node = node->in(0); | |
| 1432 bool if_true = node->is_IfTrue(); | |
| 1433 | |
| 1434 if (if_node->is_If() && if_node->outcnt() == 2 && (if_true || node->is_IfFalse())) { | |
| 1435 Node *lock_ctrl = next_control(if_node->in(0)); | |
| 1436 if (find_matching_unlock(lock_ctrl, lock, lock_ops)) { | |
| 1437 Node* lock1_node = NULL; | |
| 1438 ProjNode* proj = if_node->as_If()->proj_out(!if_true); | |
| 1439 if (if_true) { | |
| 1440 if (proj->is_IfFalse() && proj->outcnt() == 1) { | |
| 1441 lock1_node = proj->unique_out(); | |
| 1442 } | |
| 1443 } else { | |
| 1444 if (proj->is_IfTrue() && proj->outcnt() == 1) { | |
| 1445 lock1_node = proj->unique_out(); | |
| 1446 } | |
| 1447 } | |
| 1448 if (lock1_node != NULL && lock1_node->is_Lock()) { | |
| 1449 LockNode *lock1 = lock1_node->as_Lock(); | |
| 1450 if ((lock->obj_node() == lock1->obj_node()) && | |
| 1451 (lock->box_node() == lock1->box_node()) && !lock1->is_eliminated()) { | |
| 1452 lock_ops.append(lock1); | |
| 1453 return true; | |
| 1454 } | |
| 1455 } | |
| 1456 } | |
| 1457 } | |
| 1458 | |
| 1459 lock_ops.trunc_to(0); | |
| 1460 return false; | |
| 1461 } | |
| 1462 | |
| 1463 bool AbstractLockNode::find_unlocks_for_region(const RegionNode* region, LockNode* lock, | |
| 1464 GrowableArray<AbstractLockNode*> &lock_ops) { | |
| 1465 // check each control merging at this point for a matching unlock. | |
| 1466 // in(0) should be self edge so skip it. | |
| 1467 for (int i = 1; i < (int)region->req(); i++) { | |
| 1468 Node *in_node = next_control(region->in(i)); | |
| 1469 if (in_node != NULL) { | |
| 1470 if (find_matching_unlock(in_node, lock, lock_ops)) { | |
| 1471 // found a match so keep on checking. | |
| 1472 continue; | |
| 1473 } else if (find_lock_and_unlock_through_if(in_node, lock, lock_ops)) { | |
| 1474 continue; | |
| 1475 } | |
| 1476 | |
| 1477 // If we fall through to here then it was some kind of node we | |
| 1478 // don't understand or there wasn't a matching unlock, so give | |
| 1479 // up trying to merge locks. | |
| 1480 lock_ops.trunc_to(0); | |
| 1481 return false; | |
| 1482 } | |
| 1483 } | |
| 1484 return true; | |
| 1485 | |
| 1486 } | |
| 1487 | |
| 1488 #ifndef PRODUCT | |
| 1489 // | |
| 1490 // Create a counter which counts the number of times this lock is acquired | |
| 1491 // | |
| 1492 void AbstractLockNode::create_lock_counter(JVMState* state) { | |
| 1493 _counter = OptoRuntime::new_named_counter(state, NamedCounter::LockCounter); | |
| 1494 } | |
| 1495 #endif | |
| 1496 | |
| 1497 void AbstractLockNode::set_eliminated() { | |
| 1498 _eliminate = true; | |
| 1499 #ifndef PRODUCT | |
| 1500 if (_counter) { | |
| 1501 // Update the counter to indicate that this lock was eliminated. | |
| 1502 // The counter update code will stay around even though the | |
| 1503 // optimizer will eliminate the lock operation itself. | |
| 1504 _counter->set_tag(NamedCounter::EliminatedLockCounter); | |
| 1505 } | |
| 1506 #endif | |
| 1507 } | |
| 1508 | |
| 1509 //============================================================================= | |
| 1510 Node *LockNode::Ideal(PhaseGVN *phase, bool can_reshape) { | |
| 1511 | |
|
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1512 // perform any generic optimizations first (returns 'this' or NULL) |
| 0 | 1513 Node *result = SafePointNode::Ideal(phase, can_reshape); |
| 1514 | |
| 1515 // Now see if we can optimize away this lock. We don't actually | |
| 1516 // remove the locking here, we simply set the _eliminate flag which | |
| 1517 // prevents macro expansion from expanding the lock. Since we don't | |
| 1518 // modify the graph, the value returned from this function is the | |
| 1519 // one computed above. | |
|
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1520 if (result == NULL && can_reshape && EliminateLocks && !is_eliminated()) { |
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1521 // |
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1522 // If we are locking an unescaped object, the lock/unlock is unnecessary |
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1523 // |
|
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1524 ConnectionGraph *cgr = phase->C->congraph(); |
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1525 PointsToNode::EscapeState es = PointsToNode::GlobalEscape; |
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1526 if (cgr != NULL) |
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1527 es = cgr->escape_state(obj_node(), phase); |
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1528 if (es != PointsToNode::UnknownEscape && es != PointsToNode::GlobalEscape) { |
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1529 // Mark it eliminated to update any counters |
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1530 this->set_eliminated(); |
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1531 return result; |
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1532 } |
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1533 |
| 0 | 1534 // |
| 1535 // Try lock coarsening | |
| 1536 // | |
| 1537 PhaseIterGVN* iter = phase->is_IterGVN(); | |
| 1538 if (iter != NULL) { | |
| 1539 | |
| 1540 GrowableArray<AbstractLockNode*> lock_ops; | |
| 1541 | |
| 1542 Node *ctrl = next_control(in(0)); | |
| 1543 | |
| 1544 // now search back for a matching Unlock | |
| 1545 if (find_matching_unlock(ctrl, this, lock_ops)) { | |
| 1546 // found an unlock directly preceding this lock. This is the | |
| 1547 // case of single unlock directly control dependent on a | |
| 1548 // single lock which is the trivial version of case 1 or 2. | |
| 1549 } else if (ctrl->is_Region() ) { | |
| 1550 if (find_unlocks_for_region(ctrl->as_Region(), this, lock_ops)) { | |
| 1551 // found lock preceded by multiple unlocks along all paths | |
| 1552 // joining at this point which is case 3 in description above. | |
| 1553 } | |
| 1554 } else { | |
| 1555 // see if this lock comes from either half of an if and the | |
| 1556 // predecessors merges unlocks and the other half of the if | |
| 1557 // performs a lock. | |
| 1558 if (find_lock_and_unlock_through_if(ctrl, this, lock_ops)) { | |
| 1559 // found unlock splitting to an if with locks on both branches. | |
| 1560 } | |
| 1561 } | |
| 1562 | |
| 1563 if (lock_ops.length() > 0) { | |
| 1564 // add ourselves to the list of locks to be eliminated. | |
| 1565 lock_ops.append(this); | |
| 1566 | |
| 1567 #ifndef PRODUCT | |
| 1568 if (PrintEliminateLocks) { | |
| 1569 int locks = 0; | |
| 1570 int unlocks = 0; | |
| 1571 for (int i = 0; i < lock_ops.length(); i++) { | |
| 1572 AbstractLockNode* lock = lock_ops.at(i); | |
|
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1573 if (lock->Opcode() == Op_Lock) |
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1574 locks++; |
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1575 else |
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1576 unlocks++; |
| 0 | 1577 if (Verbose) { |
| 1578 lock->dump(1); | |
| 1579 } | |
| 1580 } | |
| 1581 tty->print_cr("***Eliminated %d unlocks and %d locks", unlocks, locks); | |
| 1582 } | |
| 1583 #endif | |
| 1584 | |
| 1585 // for each of the identified locks, mark them | |
| 1586 // as eliminatable | |
| 1587 for (int i = 0; i < lock_ops.length(); i++) { | |
| 1588 AbstractLockNode* lock = lock_ops.at(i); | |
| 1589 | |
| 1590 // Mark it eliminated to update any counters | |
| 1591 lock->set_eliminated(); | |
|
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1592 lock->set_coarsened(); |
| 0 | 1593 } |
| 1594 } else if (result != NULL && ctrl->is_Region() && | |
| 1595 iter->_worklist.member(ctrl)) { | |
| 1596 // We weren't able to find any opportunities but the region this | |
| 1597 // lock is control dependent on hasn't been processed yet so put | |
| 1598 // this lock back on the worklist so we can check again once any | |
| 1599 // region simplification has occurred. | |
| 1600 iter->_worklist.push(this); | |
| 1601 } | |
| 1602 } | |
| 1603 } | |
| 1604 | |
| 1605 return result; | |
| 1606 } | |
| 1607 | |
| 1608 //============================================================================= | |
| 1609 uint UnlockNode::size_of() const { return sizeof(*this); } | |
| 1610 | |
| 1611 //============================================================================= | |
| 1612 Node *UnlockNode::Ideal(PhaseGVN *phase, bool can_reshape) { | |
| 1613 | |
|
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1614 // perform any generic optimizations first (returns 'this' or NULL) |
| 0 | 1615 Node * result = SafePointNode::Ideal(phase, can_reshape); |
| 1616 | |
| 1617 // Now see if we can optimize away this unlock. We don't actually | |
| 1618 // remove the unlocking here, we simply set the _eliminate flag which | |
| 1619 // prevents macro expansion from expanding the unlock. Since we don't | |
| 1620 // modify the graph, the value returned from this function is the | |
| 1621 // one computed above. | |
|
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1622 // Escape state is defined after Parse phase. |
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1623 if (result == NULL && can_reshape && EliminateLocks && !is_eliminated()) { |
| 0 | 1624 // |
|
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1625 // If we are unlocking an unescaped object, the lock/unlock is unnecessary. |
| 0 | 1626 // |
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1627 ConnectionGraph *cgr = phase->C->congraph(); |
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1628 PointsToNode::EscapeState es = PointsToNode::GlobalEscape; |
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1629 if (cgr != NULL) |
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1630 es = cgr->escape_state(obj_node(), phase); |
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1631 if (es != PointsToNode::UnknownEscape && es != PointsToNode::GlobalEscape) { |
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1632 // Mark it eliminated to update any counters |
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1633 this->set_eliminated(); |
| 0 | 1634 } |
| 1635 } | |
| 1636 return result; | |
| 1637 } |