1 /* 2 * Copyright (c) 2005, 2015, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #include "precompiled.hpp" 26 #include "c1/c1_Compilation.hpp" 27 #include "c1/c1_FrameMap.hpp" 28 #include "c1/c1_Instruction.hpp" 29 #include "c1/c1_LIRAssembler.hpp" 30 #include "c1/c1_LIRGenerator.hpp" 31 #include "c1/c1_ValueStack.hpp" 32 #include "ci/ciArrayKlass.hpp" 33 #include "ci/ciInstance.hpp" 34 #include "ci/ciObjArray.hpp" 35 #include "memory/cardTableModRefBS.hpp" 36 #include "runtime/arguments.hpp" 37 #include "runtime/sharedRuntime.hpp" 38 #include "runtime/stubRoutines.hpp" 39 #include "runtime/vm_version.hpp" 40 #include "utilities/bitMap.inline.hpp" 41 #include "utilities/macros.hpp" 42 #if INCLUDE_ALL_GCS 43 #include "gc_implementation/g1/heapRegion.hpp" 44 #endif // INCLUDE_ALL_GCS 45 46 #ifdef ASSERT 47 #define __ gen()->lir(__FILE__, __LINE__)-> 48 #else 49 #define __ gen()->lir()-> 50 #endif 51 52 // TODO: ARM - Use some recognizable constant which still fits architectural constraints 53 #ifdef ARM 54 #define PATCHED_ADDR (204) 55 #else 56 #define PATCHED_ADDR (max_jint) 57 #endif 58 59 void PhiResolverState::reset(int max_vregs) { 60 // Initialize array sizes 61 _virtual_operands.at_put_grow(max_vregs - 1, NULL, NULL); 62 _virtual_operands.trunc_to(0); 63 _other_operands.at_put_grow(max_vregs - 1, NULL, NULL); 64 _other_operands.trunc_to(0); 65 _vreg_table.at_put_grow(max_vregs - 1, NULL, NULL); 66 _vreg_table.trunc_to(0); 67 } 68 69 70 71 //-------------------------------------------------------------- 72 // PhiResolver 73 74 // Resolves cycles: 75 // 76 // r1 := r2 becomes temp := r1 77 // r2 := r1 r1 := r2 78 // r2 := temp 79 // and orders moves: 80 // 81 // r2 := r3 becomes r1 := r2 82 // r1 := r2 r2 := r3 83 84 PhiResolver::PhiResolver(LIRGenerator* gen, int max_vregs) 85 : _gen(gen) 86 , _state(gen->resolver_state()) 87 , _temp(LIR_OprFact::illegalOpr) 88 { 89 // reinitialize the shared state arrays 90 _state.reset(max_vregs); 91 } 92 93 94 void PhiResolver::emit_move(LIR_Opr src, LIR_Opr dest) { 95 assert(src->is_valid(), ""); 96 assert(dest->is_valid(), ""); 97 __ move(src, dest); 98 } 99 100 101 void PhiResolver::move_temp_to(LIR_Opr dest) { 102 assert(_temp->is_valid(), ""); 103 emit_move(_temp, dest); 104 NOT_PRODUCT(_temp = LIR_OprFact::illegalOpr); 105 } 106 107 108 void PhiResolver::move_to_temp(LIR_Opr src) { 109 assert(_temp->is_illegal(), ""); 110 _temp = _gen->new_register(src->type()); 111 emit_move(src, _temp); 112 } 113 114 115 // Traverse assignment graph in depth first order and generate moves in post order 116 // ie. two assignments: b := c, a := b start with node c: 117 // Call graph: move(NULL, c) -> move(c, b) -> move(b, a) 118 // Generates moves in this order: move b to a and move c to b 119 // ie. cycle a := b, b := a start with node a 120 // Call graph: move(NULL, a) -> move(a, b) -> move(b, a) 121 // Generates moves in this order: move b to temp, move a to b, move temp to a 122 void PhiResolver::move(ResolveNode* src, ResolveNode* dest) { 123 if (!dest->visited()) { 124 dest->set_visited(); 125 for (int i = dest->no_of_destinations()-1; i >= 0; i --) { 126 move(dest, dest->destination_at(i)); 127 } 128 } else if (!dest->start_node()) { 129 // cylce in graph detected 130 assert(_loop == NULL, "only one loop valid!"); 131 _loop = dest; 132 move_to_temp(src->operand()); 133 return; 134 } // else dest is a start node 135 136 if (!dest->assigned()) { 137 if (_loop == dest) { 138 move_temp_to(dest->operand()); 139 dest->set_assigned(); 140 } else if (src != NULL) { 141 emit_move(src->operand(), dest->operand()); 142 dest->set_assigned(); 143 } 144 } 145 } 146 147 148 PhiResolver::~PhiResolver() { 149 int i; 150 // resolve any cycles in moves from and to virtual registers 151 for (i = virtual_operands().length() - 1; i >= 0; i --) { 152 ResolveNode* node = virtual_operands()[i]; 153 if (!node->visited()) { 154 _loop = NULL; 155 move(NULL, node); 156 node->set_start_node(); 157 assert(_temp->is_illegal(), "move_temp_to() call missing"); 158 } 159 } 160 161 // generate move for move from non virtual register to abitrary destination 162 for (i = other_operands().length() - 1; i >= 0; i --) { 163 ResolveNode* node = other_operands()[i]; 164 for (int j = node->no_of_destinations() - 1; j >= 0; j --) { 165 emit_move(node->operand(), node->destination_at(j)->operand()); 166 } 167 } 168 } 169 170 171 ResolveNode* PhiResolver::create_node(LIR_Opr opr, bool source) { 172 ResolveNode* node; 173 if (opr->is_virtual()) { 174 int vreg_num = opr->vreg_number(); 175 node = vreg_table().at_grow(vreg_num, NULL); 176 assert(node == NULL || node->operand() == opr, ""); 177 if (node == NULL) { 178 node = new ResolveNode(opr); 179 vreg_table()[vreg_num] = node; 180 } 181 // Make sure that all virtual operands show up in the list when 182 // they are used as the source of a move. 183 if (source && !virtual_operands().contains(node)) { 184 virtual_operands().append(node); 185 } 186 } else { 187 assert(source, ""); 188 node = new ResolveNode(opr); 189 other_operands().append(node); 190 } 191 return node; 192 } 193 194 195 void PhiResolver::move(LIR_Opr src, LIR_Opr dest) { 196 assert(dest->is_virtual(), ""); 197 // tty->print("move "); src->print(); tty->print(" to "); dest->print(); tty->cr(); 198 assert(src->is_valid(), ""); 199 assert(dest->is_valid(), ""); 200 ResolveNode* source = source_node(src); 201 source->append(destination_node(dest)); 202 } 203 204 205 //-------------------------------------------------------------- 206 // LIRItem 207 208 void LIRItem::set_result(LIR_Opr opr) { 209 assert(value()->operand()->is_illegal() || value()->operand()->is_constant(), "operand should never change"); 210 value()->set_operand(opr); 211 212 if (opr->is_virtual()) { 213 _gen->_instruction_for_operand.at_put_grow(opr->vreg_number(), value(), NULL); 214 } 215 216 _result = opr; 217 } 218 219 void LIRItem::load_item() { 220 if (result()->is_illegal()) { 221 // update the items result 222 _result = value()->operand(); 223 } 224 if (!result()->is_register()) { 225 LIR_Opr reg = _gen->new_register(value()->type()); 226 __ move(result(), reg); 227 if (result()->is_constant()) { 228 _result = reg; 229 } else { 230 set_result(reg); 231 } 232 } 233 } 234 235 236 void LIRItem::load_for_store(BasicType type) { 237 if (_gen->can_store_as_constant(value(), type)) { 238 _result = value()->operand(); 239 if (!_result->is_constant()) { 240 _result = LIR_OprFact::value_type(value()->type()); 241 } 242 } else if (type == T_BYTE || type == T_BOOLEAN) { 243 load_byte_item(); 244 } else { 245 load_item(); 246 } 247 } 248 249 void LIRItem::load_item_force(LIR_Opr reg) { 250 LIR_Opr r = result(); 251 if (r != reg) { 252 #if !defined(ARM) && !defined(E500V2) 253 if (r->type() != reg->type()) { 254 // moves between different types need an intervening spill slot 255 r = _gen->force_to_spill(r, reg->type()); 256 } 257 #endif 258 __ move(r, reg); 259 _result = reg; 260 } 261 } 262 263 ciObject* LIRItem::get_jobject_constant() const { 264 ObjectType* oc = type()->as_ObjectType(); 265 if (oc) { 266 return oc->constant_value(); 267 } 268 return NULL; 269 } 270 271 272 jint LIRItem::get_jint_constant() const { 273 assert(is_constant() && value() != NULL, ""); 274 assert(type()->as_IntConstant() != NULL, "type check"); 275 return type()->as_IntConstant()->value(); 276 } 277 278 279 jint LIRItem::get_address_constant() const { 280 assert(is_constant() && value() != NULL, ""); 281 assert(type()->as_AddressConstant() != NULL, "type check"); 282 return type()->as_AddressConstant()->value(); 283 } 284 285 286 jfloat LIRItem::get_jfloat_constant() const { 287 assert(is_constant() && value() != NULL, ""); 288 assert(type()->as_FloatConstant() != NULL, "type check"); 289 return type()->as_FloatConstant()->value(); 290 } 291 292 293 jdouble LIRItem::get_jdouble_constant() const { 294 assert(is_constant() && value() != NULL, ""); 295 assert(type()->as_DoubleConstant() != NULL, "type check"); 296 return type()->as_DoubleConstant()->value(); 297 } 298 299 300 jlong LIRItem::get_jlong_constant() const { 301 assert(is_constant() && value() != NULL, ""); 302 assert(type()->as_LongConstant() != NULL, "type check"); 303 return type()->as_LongConstant()->value(); 304 } 305 306 307 308 //-------------------------------------------------------------- 309 310 311 void LIRGenerator::init() { 312 _bs = Universe::heap()->barrier_set(); 313 } 314 315 316 void LIRGenerator::block_do_prolog(BlockBegin* block) { 317 #ifndef PRODUCT 318 if (PrintIRWithLIR) { 319 block->print(); 320 } 321 #endif 322 323 // set up the list of LIR instructions 324 assert(block->lir() == NULL, "LIR list already computed for this block"); 325 _lir = new LIR_List(compilation(), block); 326 block->set_lir(_lir); 327 328 __ branch_destination(block->label()); 329 330 if (LIRTraceExecution && 331 Compilation::current()->hir()->start()->block_id() != block->block_id() && 332 !block->is_set(BlockBegin::exception_entry_flag)) { 333 assert(block->lir()->instructions_list()->length() == 1, "should come right after br_dst"); 334 trace_block_entry(block); 335 } 336 } 337 338 339 void LIRGenerator::block_do_epilog(BlockBegin* block) { 340 #ifndef PRODUCT 341 if (PrintIRWithLIR) { 342 tty->cr(); 343 } 344 #endif 345 346 // LIR_Opr for unpinned constants shouldn't be referenced by other 347 // blocks so clear them out after processing the block. 348 for (int i = 0; i < _unpinned_constants.length(); i++) { 349 _unpinned_constants.at(i)->clear_operand(); 350 } 351 _unpinned_constants.trunc_to(0); 352 353 // clear our any registers for other local constants 354 _constants.trunc_to(0); 355 _reg_for_constants.trunc_to(0); 356 } 357 358 359 void LIRGenerator::block_do(BlockBegin* block) { 360 CHECK_BAILOUT(); 361 362 block_do_prolog(block); 363 set_block(block); 364 365 for (Instruction* instr = block; instr != NULL; instr = instr->next()) { 366 if (instr->is_pinned()) do_root(instr); 367 } 368 369 set_block(NULL); 370 block_do_epilog(block); 371 } 372 373 374 //-------------------------LIRGenerator----------------------------- 375 376 // This is where the tree-walk starts; instr must be root; 377 void LIRGenerator::do_root(Value instr) { 378 CHECK_BAILOUT(); 379 380 InstructionMark im(compilation(), instr); 381 382 assert(instr->is_pinned(), "use only with roots"); 383 assert(instr->subst() == instr, "shouldn't have missed substitution"); 384 385 instr->visit(this); 386 387 assert(!instr->has_uses() || instr->operand()->is_valid() || 388 instr->as_Constant() != NULL || bailed_out(), "invalid item set"); 389 } 390 391 392 // This is called for each node in tree; the walk stops if a root is reached 393 void LIRGenerator::walk(Value instr) { 394 InstructionMark im(compilation(), instr); 395 //stop walk when encounter a root 396 if (instr->is_pinned() && instr->as_Phi() == NULL || instr->operand()->is_valid()) { 397 assert(instr->operand() != LIR_OprFact::illegalOpr || instr->as_Constant() != NULL, "this root has not yet been visited"); 398 } else { 399 assert(instr->subst() == instr, "shouldn't have missed substitution"); 400 instr->visit(this); 401 // assert(instr->use_count() > 0 || instr->as_Phi() != NULL, "leaf instruction must have a use"); 402 } 403 } 404 405 406 CodeEmitInfo* LIRGenerator::state_for(Instruction* x, ValueStack* state, bool ignore_xhandler) { 407 assert(state != NULL, "state must be defined"); 408 409 #ifndef PRODUCT 410 state->verify(); 411 #endif 412 413 ValueStack* s = state; 414 for_each_state(s) { 415 if (s->kind() == ValueStack::EmptyExceptionState) { 416 assert(s->stack_size() == 0 && s->locals_size() == 0 && (s->locks_size() == 0 || s->locks_size() == 1), "state must be empty"); 417 continue; 418 } 419 420 int index; 421 Value value; 422 for_each_stack_value(s, index, value) { 423 assert(value->subst() == value, "missed substitution"); 424 if (!value->is_pinned() && value->as_Constant() == NULL && value->as_Local() == NULL) { 425 walk(value); 426 assert(value->operand()->is_valid(), "must be evaluated now"); 427 } 428 } 429 430 int bci = s->bci(); 431 IRScope* scope = s->scope(); 432 ciMethod* method = scope->method(); 433 434 MethodLivenessResult liveness = method->liveness_at_bci(bci); 435 if (bci == SynchronizationEntryBCI) { 436 if (x->as_ExceptionObject() || x->as_Throw()) { 437 // all locals are dead on exit from the synthetic unlocker 438 liveness.clear(); 439 } else { 440 assert(x->as_MonitorEnter() || x->as_ProfileInvoke(), "only other cases are MonitorEnter and ProfileInvoke"); 441 } 442 } 443 if (!liveness.is_valid()) { 444 // Degenerate or breakpointed method. 445 bailout("Degenerate or breakpointed method"); 446 } else { 447 assert((int)liveness.size() == s->locals_size(), "error in use of liveness"); 448 for_each_local_value(s, index, value) { 449 assert(value->subst() == value, "missed substition"); 450 if (liveness.at(index) && !value->type()->is_illegal()) { 451 if (!value->is_pinned() && value->as_Constant() == NULL && value->as_Local() == NULL) { 452 walk(value); 453 assert(value->operand()->is_valid(), "must be evaluated now"); 454 } 455 } else { 456 // NULL out this local so that linear scan can assume that all non-NULL values are live. 457 s->invalidate_local(index); 458 } 459 } 460 } 461 } 462 463 return new CodeEmitInfo(state, ignore_xhandler ? NULL : x->exception_handlers(), x->check_flag(Instruction::DeoptimizeOnException)); 464 } 465 466 467 CodeEmitInfo* LIRGenerator::state_for(Instruction* x) { 468 return state_for(x, x->exception_state()); 469 } 470 471 472 void LIRGenerator::klass2reg_with_patching(LIR_Opr r, ciMetadata* obj, CodeEmitInfo* info, bool need_resolve) { 473 /* C2 relies on constant pool entries being resolved (ciTypeFlow), so if TieredCompilation 474 * is active and the class hasn't yet been resolved we need to emit a patch that resolves 475 * the class. */ 476 if ((TieredCompilation && need_resolve) || !obj->is_loaded() || PatchALot) { 477 assert(info != NULL, "info must be set if class is not loaded"); 478 __ klass2reg_patch(NULL, r, info); 479 } else { 480 // no patching needed 481 __ metadata2reg(obj->constant_encoding(), r); 482 } 483 } 484 485 486 void LIRGenerator::array_range_check(LIR_Opr array, LIR_Opr index, 487 CodeEmitInfo* null_check_info, CodeEmitInfo* range_check_info) { 488 CodeStub* stub = new RangeCheckStub(range_check_info, index); 489 if (index->is_constant()) { 490 cmp_mem_int(lir_cond_belowEqual, array, arrayOopDesc::length_offset_in_bytes(), 491 index->as_jint(), null_check_info); 492 __ branch(lir_cond_belowEqual, T_INT, stub); // forward branch 493 } else { 494 cmp_reg_mem(lir_cond_aboveEqual, index, array, 495 arrayOopDesc::length_offset_in_bytes(), T_INT, null_check_info); 496 __ branch(lir_cond_aboveEqual, T_INT, stub); // forward branch 497 } 498 } 499 500 501 void LIRGenerator::nio_range_check(LIR_Opr buffer, LIR_Opr index, LIR_Opr result, CodeEmitInfo* info) { 502 CodeStub* stub = new RangeCheckStub(info, index, true); 503 if (index->is_constant()) { 504 cmp_mem_int(lir_cond_belowEqual, buffer, java_nio_Buffer::limit_offset(), index->as_jint(), info); 505 __ branch(lir_cond_belowEqual, T_INT, stub); // forward branch 506 } else { 507 cmp_reg_mem(lir_cond_aboveEqual, index, buffer, 508 java_nio_Buffer::limit_offset(), T_INT, info); 509 __ branch(lir_cond_aboveEqual, T_INT, stub); // forward branch 510 } 511 __ move(index, result); 512 } 513 514 515 516 void LIRGenerator::arithmetic_op(Bytecodes::Code code, LIR_Opr result, LIR_Opr left, LIR_Opr right, bool is_strictfp, LIR_Opr tmp_op, CodeEmitInfo* info) { 517 LIR_Opr result_op = result; 518 LIR_Opr left_op = left; 519 LIR_Opr right_op = right; 520 521 if (TwoOperandLIRForm && left_op != result_op) { 522 assert(right_op != result_op, "malformed"); 523 __ move(left_op, result_op); 524 left_op = result_op; 525 } 526 527 switch(code) { 528 case Bytecodes::_dadd: 529 case Bytecodes::_fadd: 530 case Bytecodes::_ladd: 531 case Bytecodes::_iadd: __ add(left_op, right_op, result_op); break; 532 case Bytecodes::_fmul: 533 case Bytecodes::_lmul: __ mul(left_op, right_op, result_op); break; 534 535 case Bytecodes::_dmul: 536 { 537 if (is_strictfp) { 538 __ mul_strictfp(left_op, right_op, result_op, tmp_op); break; 539 } else { 540 __ mul(left_op, right_op, result_op); break; 541 } 542 } 543 break; 544 545 case Bytecodes::_imul: 546 { 547 bool did_strength_reduce = false; 548 549 if (right->is_constant()) { 550 int c = right->as_jint(); 551 if (is_power_of_2(c)) { 552 // do not need tmp here 553 __ shift_left(left_op, exact_log2(c), result_op); 554 did_strength_reduce = true; 555 } else { 556 did_strength_reduce = strength_reduce_multiply(left_op, c, result_op, tmp_op); 557 } 558 } 559 // we couldn't strength reduce so just emit the multiply 560 if (!did_strength_reduce) { 561 __ mul(left_op, right_op, result_op); 562 } 563 } 564 break; 565 566 case Bytecodes::_dsub: 567 case Bytecodes::_fsub: 568 case Bytecodes::_lsub: 569 case Bytecodes::_isub: __ sub(left_op, right_op, result_op); break; 570 571 case Bytecodes::_fdiv: __ div (left_op, right_op, result_op); break; 572 // ldiv and lrem are implemented with a direct runtime call 573 574 case Bytecodes::_ddiv: 575 { 576 if (is_strictfp) { 577 __ div_strictfp (left_op, right_op, result_op, tmp_op); break; 578 } else { 579 __ div (left_op, right_op, result_op); break; 580 } 581 } 582 break; 583 584 case Bytecodes::_drem: 585 case Bytecodes::_frem: __ rem (left_op, right_op, result_op); break; 586 587 default: ShouldNotReachHere(); 588 } 589 } 590 591 592 void LIRGenerator::arithmetic_op_int(Bytecodes::Code code, LIR_Opr result, LIR_Opr left, LIR_Opr right, LIR_Opr tmp) { 593 arithmetic_op(code, result, left, right, false, tmp); 594 } 595 596 597 void LIRGenerator::arithmetic_op_long(Bytecodes::Code code, LIR_Opr result, LIR_Opr left, LIR_Opr right, CodeEmitInfo* info) { 598 arithmetic_op(code, result, left, right, false, LIR_OprFact::illegalOpr, info); 599 } 600 601 602 void LIRGenerator::arithmetic_op_fpu(Bytecodes::Code code, LIR_Opr result, LIR_Opr left, LIR_Opr right, bool is_strictfp, LIR_Opr tmp) { 603 arithmetic_op(code, result, left, right, is_strictfp, tmp); 604 } 605 606 607 void LIRGenerator::shift_op(Bytecodes::Code code, LIR_Opr result_op, LIR_Opr value, LIR_Opr count, LIR_Opr tmp) { 608 if (TwoOperandLIRForm && value != result_op) { 609 assert(count != result_op, "malformed"); 610 __ move(value, result_op); 611 value = result_op; 612 } 613 614 assert(count->is_constant() || count->is_register(), "must be"); 615 switch(code) { 616 case Bytecodes::_ishl: 617 case Bytecodes::_lshl: __ shift_left(value, count, result_op, tmp); break; 618 case Bytecodes::_ishr: 619 case Bytecodes::_lshr: __ shift_right(value, count, result_op, tmp); break; 620 case Bytecodes::_iushr: 621 case Bytecodes::_lushr: __ unsigned_shift_right(value, count, result_op, tmp); break; 622 default: ShouldNotReachHere(); 623 } 624 } 625 626 627 void LIRGenerator::logic_op (Bytecodes::Code code, LIR_Opr result_op, LIR_Opr left_op, LIR_Opr right_op) { 628 if (TwoOperandLIRForm && left_op != result_op) { 629 assert(right_op != result_op, "malformed"); 630 __ move(left_op, result_op); 631 left_op = result_op; 632 } 633 634 switch(code) { 635 case Bytecodes::_iand: 636 case Bytecodes::_land: __ logical_and(left_op, right_op, result_op); break; 637 638 case Bytecodes::_ior: 639 case Bytecodes::_lor: __ logical_or(left_op, right_op, result_op); break; 640 641 case Bytecodes::_ixor: 642 case Bytecodes::_lxor: __ logical_xor(left_op, right_op, result_op); break; 643 644 default: ShouldNotReachHere(); 645 } 646 } 647 648 649 void LIRGenerator::monitor_enter(LIR_Opr object, LIR_Opr lock, LIR_Opr hdr, LIR_Opr scratch, int monitor_no, CodeEmitInfo* info_for_exception, CodeEmitInfo* info) { 650 if (!GenerateSynchronizationCode) return; 651 // for slow path, use debug info for state after successful locking 652 CodeStub* slow_path = new MonitorEnterStub(object, lock, info); 653 __ load_stack_address_monitor(monitor_no, lock); 654 // for handling NullPointerException, use debug info representing just the lock stack before this monitorenter 655 __ lock_object(hdr, object, lock, scratch, slow_path, info_for_exception); 656 } 657 658 659 void LIRGenerator::monitor_exit(LIR_Opr object, LIR_Opr lock, LIR_Opr new_hdr, LIR_Opr scratch, int monitor_no) { 660 if (!GenerateSynchronizationCode) return; 661 // setup registers 662 LIR_Opr hdr = lock; 663 lock = new_hdr; 664 CodeStub* slow_path = new MonitorExitStub(lock, UseFastLocking, monitor_no); 665 __ load_stack_address_monitor(monitor_no, lock); 666 __ unlock_object(hdr, object, lock, scratch, slow_path); 667 } 668 669 #ifndef PRODUCT 670 void LIRGenerator::print_if_not_loaded(const NewInstance* new_instance) { 671 if (PrintNotLoaded && !new_instance->klass()->is_loaded()) { 672 tty->print_cr(" ###class not loaded at new bci %d", new_instance->printable_bci()); 673 } else if (PrintNotLoaded && (TieredCompilation && new_instance->is_unresolved())) { 674 tty->print_cr(" ###class not resolved at new bci %d", new_instance->printable_bci()); 675 } 676 } 677 #endif 678 679 void LIRGenerator::new_instance(LIR_Opr dst, ciInstanceKlass* klass, bool is_unresolved, LIR_Opr scratch1, LIR_Opr scratch2, LIR_Opr scratch3, LIR_Opr scratch4, LIR_Opr klass_reg, CodeEmitInfo* info) { 680 klass2reg_with_patching(klass_reg, klass, info, is_unresolved); 681 // If klass is not loaded we do not know if the klass has finalizers: 682 if (UseFastNewInstance && klass->is_loaded() 683 && !Klass::layout_helper_needs_slow_path(klass->layout_helper())) { 684 685 Runtime1::StubID stub_id = klass->is_initialized() ? Runtime1::fast_new_instance_id : Runtime1::fast_new_instance_init_check_id; 686 687 CodeStub* slow_path = new NewInstanceStub(klass_reg, dst, klass, info, stub_id); 688 689 assert(klass->is_loaded(), "must be loaded"); 690 // allocate space for instance 691 assert(klass->size_helper() >= 0, "illegal instance size"); 692 const int instance_size = align_object_size(klass->size_helper()); 693 __ allocate_object(dst, scratch1, scratch2, scratch3, scratch4, 694 oopDesc::header_size(), instance_size, klass_reg, !klass->is_initialized(), slow_path); 695 } else { 696 CodeStub* slow_path = new NewInstanceStub(klass_reg, dst, klass, info, Runtime1::new_instance_id); 697 __ branch(lir_cond_always, T_ILLEGAL, slow_path); 698 __ branch_destination(slow_path->continuation()); 699 } 700 } 701 702 703 static bool is_constant_zero(Instruction* inst) { 704 IntConstant* c = inst->type()->as_IntConstant(); 705 if (c) { 706 return (c->value() == 0); 707 } 708 return false; 709 } 710 711 712 static bool positive_constant(Instruction* inst) { 713 IntConstant* c = inst->type()->as_IntConstant(); 714 if (c) { 715 return (c->value() >= 0); 716 } 717 return false; 718 } 719 720 721 static ciArrayKlass* as_array_klass(ciType* type) { 722 if (type != NULL && type->is_array_klass() && type->is_loaded()) { 723 return (ciArrayKlass*)type; 724 } else { 725 return NULL; 726 } 727 } 728 729 static ciType* phi_declared_type(Phi* phi) { 730 ciType* t = phi->operand_at(0)->declared_type(); 731 if (t == NULL) { 732 return NULL; 733 } 734 for(int i = 1; i < phi->operand_count(); i++) { 735 if (t != phi->operand_at(i)->declared_type()) { 736 return NULL; 737 } 738 } 739 return t; 740 } 741 742 void LIRGenerator::arraycopy_helper(Intrinsic* x, int* flagsp, ciArrayKlass** expected_typep) { 743 Instruction* src = x->argument_at(0); 744 Instruction* src_pos = x->argument_at(1); 745 Instruction* dst = x->argument_at(2); 746 Instruction* dst_pos = x->argument_at(3); 747 Instruction* length = x->argument_at(4); 748 749 // first try to identify the likely type of the arrays involved 750 ciArrayKlass* expected_type = NULL; 751 bool is_exact = false, src_objarray = false, dst_objarray = false; 752 { 753 ciArrayKlass* src_exact_type = as_array_klass(src->exact_type()); 754 ciArrayKlass* src_declared_type = as_array_klass(src->declared_type()); 755 Phi* phi; 756 if (src_declared_type == NULL && (phi = src->as_Phi()) != NULL) { 757 src_declared_type = as_array_klass(phi_declared_type(phi)); 758 } 759 ciArrayKlass* dst_exact_type = as_array_klass(dst->exact_type()); 760 ciArrayKlass* dst_declared_type = as_array_klass(dst->declared_type()); 761 if (dst_declared_type == NULL && (phi = dst->as_Phi()) != NULL) { 762 dst_declared_type = as_array_klass(phi_declared_type(phi)); 763 } 764 765 if (src_exact_type != NULL && src_exact_type == dst_exact_type) { 766 // the types exactly match so the type is fully known 767 is_exact = true; 768 expected_type = src_exact_type; 769 } else if (dst_exact_type != NULL && dst_exact_type->is_obj_array_klass()) { 770 ciArrayKlass* dst_type = (ciArrayKlass*) dst_exact_type; 771 ciArrayKlass* src_type = NULL; 772 if (src_exact_type != NULL && src_exact_type->is_obj_array_klass()) { 773 src_type = (ciArrayKlass*) src_exact_type; 774 } else if (src_declared_type != NULL && src_declared_type->is_obj_array_klass()) { 775 src_type = (ciArrayKlass*) src_declared_type; 776 } 777 if (src_type != NULL) { 778 if (src_type->element_type()->is_subtype_of(dst_type->element_type())) { 779 is_exact = true; 780 expected_type = dst_type; 781 } 782 } 783 } 784 // at least pass along a good guess 785 if (expected_type == NULL) expected_type = dst_exact_type; 786 if (expected_type == NULL) expected_type = src_declared_type; 787 if (expected_type == NULL) expected_type = dst_declared_type; 788 789 src_objarray = (src_exact_type && src_exact_type->is_obj_array_klass()) || (src_declared_type && src_declared_type->is_obj_array_klass()); 790 dst_objarray = (dst_exact_type && dst_exact_type->is_obj_array_klass()) || (dst_declared_type && dst_declared_type->is_obj_array_klass()); 791 } 792 793 // if a probable array type has been identified, figure out if any 794 // of the required checks for a fast case can be elided. 795 int flags = LIR_OpArrayCopy::all_flags; 796 797 if (!src_objarray) 798 flags &= ~LIR_OpArrayCopy::src_objarray; 799 if (!dst_objarray) 800 flags &= ~LIR_OpArrayCopy::dst_objarray; 801 802 if (!x->arg_needs_null_check(0)) 803 flags &= ~LIR_OpArrayCopy::src_null_check; 804 if (!x->arg_needs_null_check(2)) 805 flags &= ~LIR_OpArrayCopy::dst_null_check; 806 807 808 if (expected_type != NULL) { 809 Value length_limit = NULL; 810 811 IfOp* ifop = length->as_IfOp(); 812 if (ifop != NULL) { 813 // look for expressions like min(v, a.length) which ends up as 814 // x > y ? y : x or x >= y ? y : x 815 if ((ifop->cond() == If::gtr || ifop->cond() == If::geq) && 816 ifop->x() == ifop->fval() && 817 ifop->y() == ifop->tval()) { 818 length_limit = ifop->y(); 819 } 820 } 821 822 // try to skip null checks and range checks 823 NewArray* src_array = src->as_NewArray(); 824 if (src_array != NULL) { 825 flags &= ~LIR_OpArrayCopy::src_null_check; 826 if (length_limit != NULL && 827 src_array->length() == length_limit && 828 is_constant_zero(src_pos)) { 829 flags &= ~LIR_OpArrayCopy::src_range_check; 830 } 831 } 832 833 NewArray* dst_array = dst->as_NewArray(); 834 if (dst_array != NULL) { 835 flags &= ~LIR_OpArrayCopy::dst_null_check; 836 if (length_limit != NULL && 837 dst_array->length() == length_limit && 838 is_constant_zero(dst_pos)) { 839 flags &= ~LIR_OpArrayCopy::dst_range_check; 840 } 841 } 842 843 // check from incoming constant values 844 if (positive_constant(src_pos)) 845 flags &= ~LIR_OpArrayCopy::src_pos_positive_check; 846 if (positive_constant(dst_pos)) 847 flags &= ~LIR_OpArrayCopy::dst_pos_positive_check; 848 if (positive_constant(length)) 849 flags &= ~LIR_OpArrayCopy::length_positive_check; 850 851 // see if the range check can be elided, which might also imply 852 // that src or dst is non-null. 853 ArrayLength* al = length->as_ArrayLength(); 854 if (al != NULL) { 855 if (al->array() == src) { 856 // it's the length of the source array 857 flags &= ~LIR_OpArrayCopy::length_positive_check; 858 flags &= ~LIR_OpArrayCopy::src_null_check; 859 if (is_constant_zero(src_pos)) 860 flags &= ~LIR_OpArrayCopy::src_range_check; 861 } 862 if (al->array() == dst) { 863 // it's the length of the destination array 864 flags &= ~LIR_OpArrayCopy::length_positive_check; 865 flags &= ~LIR_OpArrayCopy::dst_null_check; 866 if (is_constant_zero(dst_pos)) 867 flags &= ~LIR_OpArrayCopy::dst_range_check; 868 } 869 } 870 if (is_exact) { 871 flags &= ~LIR_OpArrayCopy::type_check; 872 } 873 } 874 875 IntConstant* src_int = src_pos->type()->as_IntConstant(); 876 IntConstant* dst_int = dst_pos->type()->as_IntConstant(); 877 if (src_int && dst_int) { 878 int s_offs = src_int->value(); 879 int d_offs = dst_int->value(); 880 if (src_int->value() >= dst_int->value()) { 881 flags &= ~LIR_OpArrayCopy::overlapping; 882 } 883 if (expected_type != NULL) { 884 BasicType t = expected_type->element_type()->basic_type(); 885 int element_size = type2aelembytes(t); 886 if (((arrayOopDesc::base_offset_in_bytes(t) + s_offs * element_size) % HeapWordSize == 0) && 887 ((arrayOopDesc::base_offset_in_bytes(t) + d_offs * element_size) % HeapWordSize == 0)) { 888 flags &= ~LIR_OpArrayCopy::unaligned; 889 } 890 } 891 } else if (src_pos == dst_pos || is_constant_zero(dst_pos)) { 892 // src and dest positions are the same, or dst is zero so assume 893 // nonoverlapping copy. 894 flags &= ~LIR_OpArrayCopy::overlapping; 895 } 896 897 if (src == dst) { 898 // moving within a single array so no type checks are needed 899 if (flags & LIR_OpArrayCopy::type_check) { 900 flags &= ~LIR_OpArrayCopy::type_check; 901 } 902 } 903 *flagsp = flags; 904 *expected_typep = (ciArrayKlass*)expected_type; 905 } 906 907 908 LIR_Opr LIRGenerator::round_item(LIR_Opr opr) { 909 assert(opr->is_register(), "why spill if item is not register?"); 910 911 if (RoundFPResults && UseSSE < 1 && opr->is_single_fpu()) { 912 LIR_Opr result = new_register(T_FLOAT); 913 set_vreg_flag(result, must_start_in_memory); 914 assert(opr->is_register(), "only a register can be spilled"); 915 assert(opr->value_type()->is_float(), "rounding only for floats available"); 916 __ roundfp(opr, LIR_OprFact::illegalOpr, result); 917 return result; 918 } 919 return opr; 920 } 921 922 923 LIR_Opr LIRGenerator::force_to_spill(LIR_Opr value, BasicType t) { 924 assert(type2size[t] == type2size[value->type()], 925 err_msg_res("size mismatch: t=%s, value->type()=%s", type2name(t), type2name(value->type()))); 926 if (!value->is_register()) { 927 // force into a register 928 LIR_Opr r = new_register(value->type()); 929 __ move(value, r); 930 value = r; 931 } 932 933 // create a spill location 934 LIR_Opr tmp = new_register(t); 935 set_vreg_flag(tmp, LIRGenerator::must_start_in_memory); 936 937 // move from register to spill 938 __ move(value, tmp); 939 return tmp; 940 } 941 942 void LIRGenerator::profile_branch(If* if_instr, If::Condition cond) { 943 if (if_instr->should_profile()) { 944 ciMethod* method = if_instr->profiled_method(); 945 assert(method != NULL, "method should be set if branch is profiled"); 946 ciMethodData* md = method->method_data_or_null(); 947 assert(md != NULL, "Sanity"); 948 ciProfileData* data = md->bci_to_data(if_instr->profiled_bci()); 949 assert(data != NULL, "must have profiling data"); 950 assert(data->is_BranchData(), "need BranchData for two-way branches"); 951 int taken_count_offset = md->byte_offset_of_slot(data, BranchData::taken_offset()); 952 int not_taken_count_offset = md->byte_offset_of_slot(data, BranchData::not_taken_offset()); 953 if (if_instr->is_swapped()) { 954 int t = taken_count_offset; 955 taken_count_offset = not_taken_count_offset; 956 not_taken_count_offset = t; 957 } 958 959 LIR_Opr md_reg = new_register(T_METADATA); 960 __ metadata2reg(md->constant_encoding(), md_reg); 961 962 LIR_Opr data_offset_reg = new_pointer_register(); 963 __ cmove(lir_cond(cond), 964 LIR_OprFact::intptrConst(taken_count_offset), 965 LIR_OprFact::intptrConst(not_taken_count_offset), 966 data_offset_reg, as_BasicType(if_instr->x()->type())); 967 968 // MDO cells are intptr_t, so the data_reg width is arch-dependent. 969 LIR_Opr data_reg = new_pointer_register(); 970 LIR_Address* data_addr = new LIR_Address(md_reg, data_offset_reg, data_reg->type()); 971 __ move(data_addr, data_reg); 972 // Use leal instead of add to avoid destroying condition codes on x86 973 LIR_Address* fake_incr_value = new LIR_Address(data_reg, DataLayout::counter_increment, T_INT); 974 __ leal(LIR_OprFact::address(fake_incr_value), data_reg); 975 __ move(data_reg, data_addr); 976 } 977 } 978 979 // Phi technique: 980 // This is about passing live values from one basic block to the other. 981 // In code generated with Java it is rather rare that more than one 982 // value is on the stack from one basic block to the other. 983 // We optimize our technique for efficient passing of one value 984 // (of type long, int, double..) but it can be extended. 985 // When entering or leaving a basic block, all registers and all spill 986 // slots are release and empty. We use the released registers 987 // and spill slots to pass the live values from one block 988 // to the other. The topmost value, i.e., the value on TOS of expression 989 // stack is passed in registers. All other values are stored in spilling 990 // area. Every Phi has an index which designates its spill slot 991 // At exit of a basic block, we fill the register(s) and spill slots. 992 // At entry of a basic block, the block_prolog sets up the content of phi nodes 993 // and locks necessary registers and spilling slots. 994 995 996 // move current value to referenced phi function 997 void LIRGenerator::move_to_phi(PhiResolver* resolver, Value cur_val, Value sux_val) { 998 Phi* phi = sux_val->as_Phi(); 999 // cur_val can be null without phi being null in conjunction with inlining 1000 if (phi != NULL && cur_val != NULL && cur_val != phi && !phi->is_illegal()) { 1001 LIR_Opr operand = cur_val->operand(); 1002 if (cur_val->operand()->is_illegal()) { 1003 assert(cur_val->as_Constant() != NULL || cur_val->as_Local() != NULL, 1004 "these can be produced lazily"); 1005 operand = operand_for_instruction(cur_val); 1006 } 1007 resolver->move(operand, operand_for_instruction(phi)); 1008 } 1009 } 1010 1011 1012 // Moves all stack values into their PHI position 1013 void LIRGenerator::move_to_phi(ValueStack* cur_state) { 1014 BlockBegin* bb = block(); 1015 if (bb->number_of_sux() == 1) { 1016 BlockBegin* sux = bb->sux_at(0); 1017 assert(sux->number_of_preds() > 0, "invalid CFG"); 1018 1019 // a block with only one predecessor never has phi functions 1020 if (sux->number_of_preds() > 1) { 1021 int max_phis = cur_state->stack_size() + cur_state->locals_size(); 1022 PhiResolver resolver(this, _virtual_register_number + max_phis * 2); 1023 1024 ValueStack* sux_state = sux->state(); 1025 Value sux_value; 1026 int index; 1027 1028 assert(cur_state->scope() == sux_state->scope(), "not matching"); 1029 assert(cur_state->locals_size() == sux_state->locals_size(), "not matching"); 1030 assert(cur_state->stack_size() == sux_state->stack_size(), "not matching"); 1031 1032 for_each_stack_value(sux_state, index, sux_value) { 1033 move_to_phi(&resolver, cur_state->stack_at(index), sux_value); 1034 } 1035 1036 for_each_local_value(sux_state, index, sux_value) { 1037 move_to_phi(&resolver, cur_state->local_at(index), sux_value); 1038 } 1039 1040 assert(cur_state->caller_state() == sux_state->caller_state(), "caller states must be equal"); 1041 } 1042 } 1043 } 1044 1045 1046 LIR_Opr LIRGenerator::new_register(BasicType type) { 1047 int vreg = _virtual_register_number; 1048 // add a little fudge factor for the bailout, since the bailout is 1049 // only checked periodically. This gives a few extra registers to 1050 // hand out before we really run out, which helps us keep from 1051 // tripping over assertions. 1052 if (vreg + 20 >= LIR_OprDesc::vreg_max) { 1053 bailout("out of virtual registers"); 1054 if (vreg + 2 >= LIR_OprDesc::vreg_max) { 1055 // wrap it around 1056 _virtual_register_number = LIR_OprDesc::vreg_base; 1057 } 1058 } 1059 _virtual_register_number += 1; 1060 return LIR_OprFact::virtual_register(vreg, type); 1061 } 1062 1063 1064 // Try to lock using register in hint 1065 LIR_Opr LIRGenerator::rlock(Value instr) { 1066 return new_register(instr->type()); 1067 } 1068 1069 1070 // does an rlock and sets result 1071 LIR_Opr LIRGenerator::rlock_result(Value x) { 1072 LIR_Opr reg = rlock(x); 1073 set_result(x, reg); 1074 return reg; 1075 } 1076 1077 1078 // does an rlock and sets result 1079 LIR_Opr LIRGenerator::rlock_result(Value x, BasicType type) { 1080 LIR_Opr reg; 1081 switch (type) { 1082 case T_BYTE: 1083 case T_BOOLEAN: 1084 reg = rlock_byte(type); 1085 break; 1086 default: 1087 reg = rlock(x); 1088 break; 1089 } 1090 1091 set_result(x, reg); 1092 return reg; 1093 } 1094 1095 1096 //--------------------------------------------------------------------- 1097 ciObject* LIRGenerator::get_jobject_constant(Value value) { 1098 ObjectType* oc = value->type()->as_ObjectType(); 1099 if (oc) { 1100 return oc->constant_value(); 1101 } 1102 return NULL; 1103 } 1104 1105 1106 void LIRGenerator::do_ExceptionObject(ExceptionObject* x) { 1107 assert(block()->is_set(BlockBegin::exception_entry_flag), "ExceptionObject only allowed in exception handler block"); 1108 assert(block()->next() == x, "ExceptionObject must be first instruction of block"); 1109 1110 // no moves are created for phi functions at the begin of exception 1111 // handlers, so assign operands manually here 1112 for_each_phi_fun(block(), phi, 1113 operand_for_instruction(phi)); 1114 1115 LIR_Opr thread_reg = getThreadPointer(); 1116 __ move_wide(new LIR_Address(thread_reg, in_bytes(JavaThread::exception_oop_offset()), T_OBJECT), 1117 exceptionOopOpr()); 1118 __ move_wide(LIR_OprFact::oopConst(NULL), 1119 new LIR_Address(thread_reg, in_bytes(JavaThread::exception_oop_offset()), T_OBJECT)); 1120 __ move_wide(LIR_OprFact::oopConst(NULL), 1121 new LIR_Address(thread_reg, in_bytes(JavaThread::exception_pc_offset()), T_OBJECT)); 1122 1123 LIR_Opr result = new_register(T_OBJECT); 1124 __ move(exceptionOopOpr(), result); 1125 set_result(x, result); 1126 } 1127 1128 1129 //---------------------------------------------------------------------- 1130 //---------------------------------------------------------------------- 1131 //---------------------------------------------------------------------- 1132 //---------------------------------------------------------------------- 1133 // visitor functions 1134 //---------------------------------------------------------------------- 1135 //---------------------------------------------------------------------- 1136 //---------------------------------------------------------------------- 1137 //---------------------------------------------------------------------- 1138 1139 void LIRGenerator::do_Phi(Phi* x) { 1140 // phi functions are never visited directly 1141 ShouldNotReachHere(); 1142 } 1143 1144 1145 // Code for a constant is generated lazily unless the constant is frequently used and can't be inlined. 1146 void LIRGenerator::do_Constant(Constant* x) { 1147 if (x->state_before() != NULL) { 1148 // Any constant with a ValueStack requires patching so emit the patch here 1149 LIR_Opr reg = rlock_result(x); 1150 CodeEmitInfo* info = state_for(x, x->state_before()); 1151 __ oop2reg_patch(NULL, reg, info); 1152 } else if (x->use_count() > 1 && !can_inline_as_constant(x)) { 1153 if (!x->is_pinned()) { 1154 // unpinned constants are handled specially so that they can be 1155 // put into registers when they are used multiple times within a 1156 // block. After the block completes their operand will be 1157 // cleared so that other blocks can't refer to that register. 1158 set_result(x, load_constant(x)); 1159 } else { 1160 LIR_Opr res = x->operand(); 1161 if (!res->is_valid()) { 1162 res = LIR_OprFact::value_type(x->type()); 1163 } 1164 if (res->is_constant()) { 1165 LIR_Opr reg = rlock_result(x); 1166 __ move(res, reg); 1167 } else { 1168 set_result(x, res); 1169 } 1170 } 1171 } else { 1172 set_result(x, LIR_OprFact::value_type(x->type())); 1173 } 1174 } 1175 1176 1177 void LIRGenerator::do_Local(Local* x) { 1178 // operand_for_instruction has the side effect of setting the result 1179 // so there's no need to do it here. 1180 operand_for_instruction(x); 1181 } 1182 1183 1184 void LIRGenerator::do_IfInstanceOf(IfInstanceOf* x) { 1185 Unimplemented(); 1186 } 1187 1188 1189 void LIRGenerator::do_Return(Return* x) { 1190 if (compilation()->env()->dtrace_method_probes()) { 1191 BasicTypeList signature; 1192 signature.append(LP64_ONLY(T_LONG) NOT_LP64(T_INT)); // thread 1193 signature.append(T_METADATA); // Method* 1194 LIR_OprList* args = new LIR_OprList(); 1195 args->append(getThreadPointer()); 1196 LIR_Opr meth = new_register(T_METADATA); 1197 __ metadata2reg(method()->constant_encoding(), meth); 1198 args->append(meth); 1199 call_runtime(&signature, args, CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_exit), voidType, NULL); 1200 } 1201 1202 if (x->type()->is_void()) { 1203 __ return_op(LIR_OprFact::illegalOpr); 1204 } else { 1205 LIR_Opr reg = result_register_for(x->type(), /*callee=*/true); 1206 LIRItem result(x->result(), this); 1207 1208 result.load_item_force(reg); 1209 __ return_op(result.result()); 1210 } 1211 set_no_result(x); 1212 } 1213 1214 // Examble: ref.get() 1215 // Combination of LoadField and g1 pre-write barrier 1216 void LIRGenerator::do_Reference_get(Intrinsic* x) { 1217 1218 const int referent_offset = java_lang_ref_Reference::referent_offset; 1219 guarantee(referent_offset > 0, "referent offset not initialized"); 1220 1221 assert(x->number_of_arguments() == 1, "wrong type"); 1222 1223 LIRItem reference(x->argument_at(0), this); 1224 reference.load_item(); 1225 1226 // need to perform the null check on the reference objecy 1227 CodeEmitInfo* info = NULL; 1228 if (x->needs_null_check()) { 1229 info = state_for(x); 1230 } 1231 1232 LIR_Address* referent_field_adr = 1233 new LIR_Address(reference.result(), referent_offset, T_OBJECT); 1234 1235 LIR_Opr result = rlock_result(x); 1236 1237 __ load(referent_field_adr, result, info); 1238 1239 // Register the value in the referent field with the pre-barrier 1240 pre_barrier(LIR_OprFact::illegalOpr /* addr_opr */, 1241 result /* pre_val */, 1242 false /* do_load */, 1243 false /* patch */, 1244 NULL /* info */); 1245 } 1246 1247 // Example: clazz.isInstance(object) 1248 void LIRGenerator::do_isInstance(Intrinsic* x) { 1249 assert(x->number_of_arguments() == 2, "wrong type"); 1250 1251 // TODO could try to substitute this node with an equivalent InstanceOf 1252 // if clazz is known to be a constant Class. This will pick up newly found 1253 // constants after HIR construction. I'll leave this to a future change. 1254 1255 // as a first cut, make a simple leaf call to runtime to stay platform independent. 1256 // could follow the aastore example in a future change. 1257 1258 LIRItem clazz(x->argument_at(0), this); 1259 LIRItem object(x->argument_at(1), this); 1260 clazz.load_item(); 1261 object.load_item(); 1262 LIR_Opr result = rlock_result(x); 1263 1264 // need to perform null check on clazz 1265 if (x->needs_null_check()) { 1266 CodeEmitInfo* info = state_for(x); 1267 __ null_check(clazz.result(), info); 1268 } 1269 1270 LIR_Opr call_result = call_runtime(clazz.value(), object.value(), 1271 CAST_FROM_FN_PTR(address, Runtime1::is_instance_of), 1272 x->type(), 1273 NULL); // NULL CodeEmitInfo results in a leaf call 1274 __ move(call_result, result); 1275 } 1276 1277 // Example: object.getClass () 1278 void LIRGenerator::do_getClass(Intrinsic* x) { 1279 assert(x->number_of_arguments() == 1, "wrong type"); 1280 1281 LIRItem rcvr(x->argument_at(0), this); 1282 rcvr.load_item(); 1283 LIR_Opr temp = new_register(T_METADATA); 1284 LIR_Opr result = rlock_result(x); 1285 1286 // need to perform the null check on the rcvr 1287 CodeEmitInfo* info = NULL; 1288 if (x->needs_null_check()) { 1289 info = state_for(x); 1290 } 1291 1292 // FIXME T_ADDRESS should actually be T_METADATA but it can't because the 1293 // meaning of these two is mixed up (see JDK-8026837). 1294 __ move(new LIR_Address(rcvr.result(), oopDesc::klass_offset_in_bytes(), T_ADDRESS), temp, info); 1295 __ move_wide(new LIR_Address(temp, in_bytes(Klass::java_mirror_offset()), T_OBJECT), result); 1296 } 1297 1298 1299 // Example: Thread.currentThread() 1300 void LIRGenerator::do_currentThread(Intrinsic* x) { 1301 assert(x->number_of_arguments() == 0, "wrong type"); 1302 LIR_Opr reg = rlock_result(x); 1303 __ move_wide(new LIR_Address(getThreadPointer(), in_bytes(JavaThread::threadObj_offset()), T_OBJECT), reg); 1304 } 1305 1306 1307 void LIRGenerator::do_RegisterFinalizer(Intrinsic* x) { 1308 assert(x->number_of_arguments() == 1, "wrong type"); 1309 LIRItem receiver(x->argument_at(0), this); 1310 1311 receiver.load_item(); 1312 BasicTypeList signature; 1313 signature.append(T_OBJECT); // receiver 1314 LIR_OprList* args = new LIR_OprList(); 1315 args->append(receiver.result()); 1316 CodeEmitInfo* info = state_for(x, x->state()); 1317 call_runtime(&signature, args, 1318 CAST_FROM_FN_PTR(address, Runtime1::entry_for(Runtime1::register_finalizer_id)), 1319 voidType, info); 1320 1321 set_no_result(x); 1322 } 1323 1324 1325 //------------------------local access-------------------------------------- 1326 1327 LIR_Opr LIRGenerator::operand_for_instruction(Instruction* x) { 1328 if (x->operand()->is_illegal()) { 1329 Constant* c = x->as_Constant(); 1330 if (c != NULL) { 1331 x->set_operand(LIR_OprFact::value_type(c->type())); 1332 } else { 1333 assert(x->as_Phi() || x->as_Local() != NULL, "only for Phi and Local"); 1334 // allocate a virtual register for this local or phi 1335 x->set_operand(rlock(x)); 1336 _instruction_for_operand.at_put_grow(x->operand()->vreg_number(), x, NULL); 1337 } 1338 } 1339 return x->operand(); 1340 } 1341 1342 1343 Instruction* LIRGenerator::instruction_for_opr(LIR_Opr opr) { 1344 if (opr->is_virtual()) { 1345 return instruction_for_vreg(opr->vreg_number()); 1346 } 1347 return NULL; 1348 } 1349 1350 1351 Instruction* LIRGenerator::instruction_for_vreg(int reg_num) { 1352 if (reg_num < _instruction_for_operand.length()) { 1353 return _instruction_for_operand.at(reg_num); 1354 } 1355 return NULL; 1356 } 1357 1358 1359 void LIRGenerator::set_vreg_flag(int vreg_num, VregFlag f) { 1360 if (_vreg_flags.size_in_bits() == 0) { 1361 BitMap2D temp(100, num_vreg_flags); 1362 temp.clear(); 1363 _vreg_flags = temp; 1364 } 1365 _vreg_flags.at_put_grow(vreg_num, f, true); 1366 } 1367 1368 bool LIRGenerator::is_vreg_flag_set(int vreg_num, VregFlag f) { 1369 if (!_vreg_flags.is_valid_index(vreg_num, f)) { 1370 return false; 1371 } 1372 return _vreg_flags.at(vreg_num, f); 1373 } 1374 1375 1376 // Block local constant handling. This code is useful for keeping 1377 // unpinned constants and constants which aren't exposed in the IR in 1378 // registers. Unpinned Constant instructions have their operands 1379 // cleared when the block is finished so that other blocks can't end 1380 // up referring to their registers. 1381 1382 LIR_Opr LIRGenerator::load_constant(Constant* x) { 1383 assert(!x->is_pinned(), "only for unpinned constants"); 1384 _unpinned_constants.append(x); 1385 return load_constant(LIR_OprFact::value_type(x->type())->as_constant_ptr()); 1386 } 1387 1388 1389 LIR_Opr LIRGenerator::load_constant(LIR_Const* c) { 1390 BasicType t = c->type(); 1391 for (int i = 0; i < _constants.length(); i++) { 1392 LIR_Const* other = _constants.at(i); 1393 if (t == other->type()) { 1394 switch (t) { 1395 case T_INT: 1396 case T_FLOAT: 1397 if (c->as_jint_bits() != other->as_jint_bits()) continue; 1398 break; 1399 case T_LONG: 1400 case T_DOUBLE: 1401 if (c->as_jint_hi_bits() != other->as_jint_hi_bits()) continue; 1402 if (c->as_jint_lo_bits() != other->as_jint_lo_bits()) continue; 1403 break; 1404 case T_OBJECT: 1405 if (c->as_jobject() != other->as_jobject()) continue; 1406 break; 1407 } 1408 return _reg_for_constants.at(i); 1409 } 1410 } 1411 1412 LIR_Opr result = new_register(t); 1413 __ move((LIR_Opr)c, result); 1414 _constants.append(c); 1415 _reg_for_constants.append(result); 1416 return result; 1417 } 1418 1419 // Various barriers 1420 1421 void LIRGenerator::pre_barrier(LIR_Opr addr_opr, LIR_Opr pre_val, 1422 bool do_load, bool patch, CodeEmitInfo* info) { 1423 // Do the pre-write barrier, if any. 1424 switch (_bs->kind()) { 1425 #if INCLUDE_ALL_GCS 1426 case BarrierSet::G1SATBCT: 1427 case BarrierSet::G1SATBCTLogging: 1428 G1SATBCardTableModRef_pre_barrier(addr_opr, pre_val, do_load, patch, info); 1429 break; 1430 #endif // INCLUDE_ALL_GCS 1431 case BarrierSet::CardTableModRef: 1432 case BarrierSet::CardTableExtension: 1433 // No pre barriers 1434 break; 1435 case BarrierSet::ModRef: 1436 // No pre barriers 1437 break; 1438 default : 1439 ShouldNotReachHere(); 1440 1441 } 1442 } 1443 1444 void LIRGenerator::post_barrier(LIR_OprDesc* addr, LIR_OprDesc* new_val) { 1445 switch (_bs->kind()) { 1446 #if INCLUDE_ALL_GCS 1447 case BarrierSet::G1SATBCT: 1448 case BarrierSet::G1SATBCTLogging: 1449 G1SATBCardTableModRef_post_barrier(addr, new_val); 1450 break; 1451 #endif // INCLUDE_ALL_GCS 1452 case BarrierSet::CardTableModRef: 1453 case BarrierSet::CardTableExtension: 1454 CardTableModRef_post_barrier(addr, new_val); 1455 break; 1456 case BarrierSet::ModRef: 1457 // No post barriers 1458 break; 1459 default : 1460 ShouldNotReachHere(); 1461 } 1462 } 1463 1464 //////////////////////////////////////////////////////////////////////// 1465 #if INCLUDE_ALL_GCS 1466 1467 void LIRGenerator::G1SATBCardTableModRef_pre_barrier(LIR_Opr addr_opr, LIR_Opr pre_val, 1468 bool do_load, bool patch, CodeEmitInfo* info) { 1469 // First we test whether marking is in progress. 1470 BasicType flag_type; 1471 if (in_bytes(PtrQueue::byte_width_of_active()) == 4) { 1472 flag_type = T_INT; 1473 } else { 1474 guarantee(in_bytes(PtrQueue::byte_width_of_active()) == 1, 1475 "Assumption"); 1476 flag_type = T_BYTE; 1477 } 1478 LIR_Opr thrd = getThreadPointer(); 1479 LIR_Address* mark_active_flag_addr = 1480 new LIR_Address(thrd, 1481 in_bytes(JavaThread::satb_mark_queue_offset() + 1482 PtrQueue::byte_offset_of_active()), 1483 flag_type); 1484 // Read the marking-in-progress flag. 1485 LIR_Opr flag_val = new_register(T_INT); 1486 __ load(mark_active_flag_addr, flag_val); 1487 __ cmp(lir_cond_notEqual, flag_val, LIR_OprFact::intConst(0)); 1488 1489 LIR_PatchCode pre_val_patch_code = lir_patch_none; 1490 1491 CodeStub* slow; 1492 1493 if (do_load) { 1494 assert(pre_val == LIR_OprFact::illegalOpr, "sanity"); 1495 assert(addr_opr != LIR_OprFact::illegalOpr, "sanity"); 1496 1497 if (patch) 1498 pre_val_patch_code = lir_patch_normal; 1499 1500 pre_val = new_register(T_OBJECT); 1501 1502 if (!addr_opr->is_address()) { 1503 assert(addr_opr->is_register(), "must be"); 1504 addr_opr = LIR_OprFact::address(new LIR_Address(addr_opr, T_OBJECT)); 1505 } 1506 slow = new G1PreBarrierStub(addr_opr, pre_val, pre_val_patch_code, info); 1507 } else { 1508 assert(addr_opr == LIR_OprFact::illegalOpr, "sanity"); 1509 assert(pre_val->is_register(), "must be"); 1510 assert(pre_val->type() == T_OBJECT, "must be an object"); 1511 assert(info == NULL, "sanity"); 1512 1513 slow = new G1PreBarrierStub(pre_val); 1514 } 1515 1516 __ branch(lir_cond_notEqual, T_INT, slow); 1517 __ branch_destination(slow->continuation()); 1518 } 1519 1520 void LIRGenerator::G1SATBCardTableModRef_post_barrier(LIR_OprDesc* addr, LIR_OprDesc* new_val) { 1521 // If the "new_val" is a constant NULL, no barrier is necessary. 1522 if (new_val->is_constant() && 1523 new_val->as_constant_ptr()->as_jobject() == NULL) return; 1524 1525 if (!new_val->is_register()) { 1526 LIR_Opr new_val_reg = new_register(T_OBJECT); 1527 if (new_val->is_constant()) { 1528 __ move(new_val, new_val_reg); 1529 } else { 1530 __ leal(new_val, new_val_reg); 1531 } 1532 new_val = new_val_reg; 1533 } 1534 assert(new_val->is_register(), "must be a register at this point"); 1535 1536 if (addr->is_address()) { 1537 LIR_Address* address = addr->as_address_ptr(); 1538 LIR_Opr ptr = new_pointer_register(); 1539 if (!address->index()->is_valid() && address->disp() == 0) { 1540 __ move(address->base(), ptr); 1541 } else { 1542 assert(address->disp() != max_jint, "lea doesn't support patched addresses!"); 1543 __ leal(addr, ptr); 1544 } 1545 addr = ptr; 1546 } 1547 assert(addr->is_register(), "must be a register at this point"); 1548 1549 LIR_Opr xor_res = new_pointer_register(); 1550 LIR_Opr xor_shift_res = new_pointer_register(); 1551 if (TwoOperandLIRForm ) { 1552 __ move(addr, xor_res); 1553 __ logical_xor(xor_res, new_val, xor_res); 1554 __ move(xor_res, xor_shift_res); 1555 __ unsigned_shift_right(xor_shift_res, 1556 LIR_OprFact::intConst(HeapRegion::LogOfHRGrainBytes), 1557 xor_shift_res, 1558 LIR_OprDesc::illegalOpr()); 1559 } else { 1560 __ logical_xor(addr, new_val, xor_res); 1561 __ unsigned_shift_right(xor_res, 1562 LIR_OprFact::intConst(HeapRegion::LogOfHRGrainBytes), 1563 xor_shift_res, 1564 LIR_OprDesc::illegalOpr()); 1565 } 1566 1567 if (!new_val->is_register()) { 1568 LIR_Opr new_val_reg = new_register(T_OBJECT); 1569 __ leal(new_val, new_val_reg); 1570 new_val = new_val_reg; 1571 } 1572 assert(new_val->is_register(), "must be a register at this point"); 1573 1574 __ cmp(lir_cond_notEqual, xor_shift_res, LIR_OprFact::intptrConst(NULL_WORD)); 1575 1576 CodeStub* slow = new G1PostBarrierStub(addr, new_val); 1577 __ branch(lir_cond_notEqual, LP64_ONLY(T_LONG) NOT_LP64(T_INT), slow); 1578 __ branch_destination(slow->continuation()); 1579 } 1580 1581 #endif // INCLUDE_ALL_GCS 1582 //////////////////////////////////////////////////////////////////////// 1583 1584 void LIRGenerator::CardTableModRef_post_barrier(LIR_OprDesc* addr, LIR_OprDesc* new_val) { 1585 CardTableModRefBS* ct = barrier_set_cast<CardTableModRefBS>(_bs); 1586 assert(sizeof(*(ct->byte_map_base)) == sizeof(jbyte), "adjust this code"); 1587 LIR_Const* card_table_base = new LIR_Const(ct->byte_map_base); 1588 if (addr->is_address()) { 1589 LIR_Address* address = addr->as_address_ptr(); 1590 // ptr cannot be an object because we use this barrier for array card marks 1591 // and addr can point in the middle of an array. 1592 LIR_Opr ptr = new_pointer_register(); 1593 if (!address->index()->is_valid() && address->disp() == 0) { 1594 __ move(address->base(), ptr); 1595 } else { 1596 assert(address->disp() != max_jint, "lea doesn't support patched addresses!"); 1597 __ leal(addr, ptr); 1598 } 1599 addr = ptr; 1600 } 1601 assert(addr->is_register(), "must be a register at this point"); 1602 1603 #ifdef ARM 1604 // TODO: ARM - move to platform-dependent code 1605 LIR_Opr tmp = FrameMap::R14_opr; 1606 if (VM_Version::supports_movw()) { 1607 __ move((LIR_Opr)card_table_base, tmp); 1608 } else { 1609 __ move(new LIR_Address(FrameMap::Rthread_opr, in_bytes(JavaThread::card_table_base_offset()), T_ADDRESS), tmp); 1610 } 1611 1612 LIR_Address *card_addr = new LIR_Address(tmp, addr, (LIR_Address::Scale) -CardTableModRefBS::card_shift, 0, T_BYTE); 1613 if(((int)ct->byte_map_base & 0xff) == 0) { 1614 __ move(tmp, card_addr); 1615 } else { 1616 LIR_Opr tmp_zero = new_register(T_INT); 1617 __ move(LIR_OprFact::intConst(0), tmp_zero); 1618 __ move(tmp_zero, card_addr); 1619 } 1620 #else // ARM 1621 LIR_Opr tmp = new_pointer_register(); 1622 if (TwoOperandLIRForm) { 1623 __ move(addr, tmp); 1624 __ unsigned_shift_right(tmp, CardTableModRefBS::card_shift, tmp); 1625 } else { 1626 __ unsigned_shift_right(addr, CardTableModRefBS::card_shift, tmp); 1627 } 1628 if (can_inline_as_constant(card_table_base)) { 1629 __ move(LIR_OprFact::intConst(0), 1630 new LIR_Address(tmp, card_table_base->as_jint(), T_BYTE)); 1631 } else { 1632 __ move(LIR_OprFact::intConst(0), 1633 new LIR_Address(tmp, load_constant(card_table_base), 1634 T_BYTE)); 1635 } 1636 #endif // ARM 1637 } 1638 1639 1640 //------------------------field access-------------------------------------- 1641 1642 // Comment copied form templateTable_i486.cpp 1643 // ---------------------------------------------------------------------------- 1644 // Volatile variables demand their effects be made known to all CPU's in 1645 // order. Store buffers on most chips allow reads & writes to reorder; the 1646 // JMM's ReadAfterWrite.java test fails in -Xint mode without some kind of 1647 // memory barrier (i.e., it's not sufficient that the interpreter does not 1648 // reorder volatile references, the hardware also must not reorder them). 1649 // 1650 // According to the new Java Memory Model (JMM): 1651 // (1) All volatiles are serialized wrt to each other. 1652 // ALSO reads & writes act as aquire & release, so: 1653 // (2) A read cannot let unrelated NON-volatile memory refs that happen after 1654 // the read float up to before the read. It's OK for non-volatile memory refs 1655 // that happen before the volatile read to float down below it. 1656 // (3) Similar a volatile write cannot let unrelated NON-volatile memory refs 1657 // that happen BEFORE the write float down to after the write. It's OK for 1658 // non-volatile memory refs that happen after the volatile write to float up 1659 // before it. 1660 // 1661 // We only put in barriers around volatile refs (they are expensive), not 1662 // _between_ memory refs (that would require us to track the flavor of the 1663 // previous memory refs). Requirements (2) and (3) require some barriers 1664 // before volatile stores and after volatile loads. These nearly cover 1665 // requirement (1) but miss the volatile-store-volatile-load case. This final 1666 // case is placed after volatile-stores although it could just as well go 1667 // before volatile-loads. 1668 1669 1670 void LIRGenerator::do_StoreField(StoreField* x) { 1671 bool needs_patching = x->needs_patching(); 1672 bool is_volatile = x->field()->is_volatile(); 1673 BasicType field_type = x->field_type(); 1674 bool is_oop = (field_type == T_ARRAY || field_type == T_OBJECT); 1675 1676 CodeEmitInfo* info = NULL; 1677 if (needs_patching) { 1678 assert(x->explicit_null_check() == NULL, "can't fold null check into patching field access"); 1679 info = state_for(x, x->state_before()); 1680 } else if (x->needs_null_check()) { 1681 NullCheck* nc = x->explicit_null_check(); 1682 if (nc == NULL) { 1683 info = state_for(x); 1684 } else { 1685 info = state_for(nc); 1686 } 1687 } 1688 1689 1690 LIRItem object(x->obj(), this); 1691 LIRItem value(x->value(), this); 1692 1693 object.load_item(); 1694 1695 if (is_volatile || needs_patching) { 1696 // load item if field is volatile (fewer special cases for volatiles) 1697 // load item if field not initialized 1698 // load item if field not constant 1699 // because of code patching we cannot inline constants 1700 if (field_type == T_BYTE || field_type == T_BOOLEAN) { 1701 value.load_byte_item(); 1702 } else { 1703 value.load_item(); 1704 } 1705 } else { 1706 value.load_for_store(field_type); 1707 } 1708 1709 set_no_result(x); 1710 1711 #ifndef PRODUCT 1712 if (PrintNotLoaded && needs_patching) { 1713 tty->print_cr(" ###class not loaded at store_%s bci %d", 1714 x->is_static() ? "static" : "field", x->printable_bci()); 1715 } 1716 #endif 1717 1718 if (x->needs_null_check() && 1719 (needs_patching || 1720 MacroAssembler::needs_explicit_null_check(x->offset()))) { 1721 // emit an explicit null check because the offset is too large 1722 __ null_check(object.result(), new CodeEmitInfo(info)); 1723 } 1724 1725 LIR_Address* address; 1726 if (needs_patching) { 1727 // we need to patch the offset in the instruction so don't allow 1728 // generate_address to try to be smart about emitting the -1. 1729 // Otherwise the patching code won't know how to find the 1730 // instruction to patch. 1731 address = new LIR_Address(object.result(), PATCHED_ADDR, field_type); 1732 } else { 1733 address = generate_address(object.result(), x->offset(), field_type); 1734 } 1735 1736 if (is_volatile && os::is_MP()) { 1737 __ membar_release(); 1738 } 1739 1740 if (is_oop) { 1741 // Do the pre-write barrier, if any. 1742 pre_barrier(LIR_OprFact::address(address), 1743 LIR_OprFact::illegalOpr /* pre_val */, 1744 true /* do_load*/, 1745 needs_patching, 1746 (info ? new CodeEmitInfo(info) : NULL)); 1747 } 1748 1749 bool needs_atomic_access = is_volatile || AlwaysAtomicAccesses; 1750 if (needs_atomic_access && !needs_patching) { 1751 volatile_field_store(value.result(), address, info); 1752 } else { 1753 LIR_PatchCode patch_code = needs_patching ? lir_patch_normal : lir_patch_none; 1754 __ store(value.result(), address, info, patch_code); 1755 } 1756 1757 if (is_oop) { 1758 // Store to object so mark the card of the header 1759 post_barrier(object.result(), value.result()); 1760 } 1761 1762 if (is_volatile && os::is_MP()) { 1763 __ membar(); 1764 } 1765 } 1766 1767 1768 void LIRGenerator::do_LoadField(LoadField* x) { 1769 bool needs_patching = x->needs_patching(); 1770 bool is_volatile = x->field()->is_volatile(); 1771 BasicType field_type = x->field_type(); 1772 1773 CodeEmitInfo* info = NULL; 1774 if (needs_patching) { 1775 assert(x->explicit_null_check() == NULL, "can't fold null check into patching field access"); 1776 info = state_for(x, x->state_before()); 1777 } else if (x->needs_null_check()) { 1778 NullCheck* nc = x->explicit_null_check(); 1779 if (nc == NULL) { 1780 info = state_for(x); 1781 } else { 1782 info = state_for(nc); 1783 } 1784 } 1785 1786 LIRItem object(x->obj(), this); 1787 1788 object.load_item(); 1789 1790 #ifndef PRODUCT 1791 if (PrintNotLoaded && needs_patching) { 1792 tty->print_cr(" ###class not loaded at load_%s bci %d", 1793 x->is_static() ? "static" : "field", x->printable_bci()); 1794 } 1795 #endif 1796 1797 bool stress_deopt = StressLoopInvariantCodeMotion && info && info->deoptimize_on_exception(); 1798 if (x->needs_null_check() && 1799 (needs_patching || 1800 MacroAssembler::needs_explicit_null_check(x->offset()) || 1801 stress_deopt)) { 1802 LIR_Opr obj = object.result(); 1803 if (stress_deopt) { 1804 obj = new_register(T_OBJECT); 1805 __ move(LIR_OprFact::oopConst(NULL), obj); 1806 } 1807 // emit an explicit null check because the offset is too large 1808 __ null_check(obj, new CodeEmitInfo(info)); 1809 } 1810 1811 LIR_Opr reg = rlock_result(x, field_type); 1812 LIR_Address* address; 1813 if (needs_patching) { 1814 // we need to patch the offset in the instruction so don't allow 1815 // generate_address to try to be smart about emitting the -1. 1816 // Otherwise the patching code won't know how to find the 1817 // instruction to patch. 1818 address = new LIR_Address(object.result(), PATCHED_ADDR, field_type); 1819 } else { 1820 address = generate_address(object.result(), x->offset(), field_type); 1821 } 1822 1823 bool needs_atomic_access = is_volatile || AlwaysAtomicAccesses; 1824 if (needs_atomic_access && !needs_patching) { 1825 volatile_field_load(address, reg, info); 1826 } else { 1827 LIR_PatchCode patch_code = needs_patching ? lir_patch_normal : lir_patch_none; 1828 __ load(address, reg, info, patch_code); 1829 } 1830 1831 if (is_volatile && os::is_MP()) { 1832 __ membar_acquire(); 1833 } 1834 } 1835 1836 1837 //------------------------java.nio.Buffer.checkIndex------------------------ 1838 1839 // int java.nio.Buffer.checkIndex(int) 1840 void LIRGenerator::do_NIOCheckIndex(Intrinsic* x) { 1841 // NOTE: by the time we are in checkIndex() we are guaranteed that 1842 // the buffer is non-null (because checkIndex is package-private and 1843 // only called from within other methods in the buffer). 1844 assert(x->number_of_arguments() == 2, "wrong type"); 1845 LIRItem buf (x->argument_at(0), this); 1846 LIRItem index(x->argument_at(1), this); 1847 buf.load_item(); 1848 index.load_item(); 1849 1850 LIR_Opr result = rlock_result(x); 1851 if (GenerateRangeChecks) { 1852 CodeEmitInfo* info = state_for(x); 1853 CodeStub* stub = new RangeCheckStub(info, index.result(), true); 1854 if (index.result()->is_constant()) { 1855 cmp_mem_int(lir_cond_belowEqual, buf.result(), java_nio_Buffer::limit_offset(), index.result()->as_jint(), info); 1856 __ branch(lir_cond_belowEqual, T_INT, stub); 1857 } else { 1858 cmp_reg_mem(lir_cond_aboveEqual, index.result(), buf.result(), 1859 java_nio_Buffer::limit_offset(), T_INT, info); 1860 __ branch(lir_cond_aboveEqual, T_INT, stub); 1861 } 1862 __ move(index.result(), result); 1863 } else { 1864 // Just load the index into the result register 1865 __ move(index.result(), result); 1866 } 1867 } 1868 1869 1870 //------------------------array access-------------------------------------- 1871 1872 1873 void LIRGenerator::do_ArrayLength(ArrayLength* x) { 1874 LIRItem array(x->array(), this); 1875 array.load_item(); 1876 LIR_Opr reg = rlock_result(x); 1877 1878 CodeEmitInfo* info = NULL; 1879 if (x->needs_null_check()) { 1880 NullCheck* nc = x->explicit_null_check(); 1881 if (nc == NULL) { 1882 info = state_for(x); 1883 } else { 1884 info = state_for(nc); 1885 } 1886 if (StressLoopInvariantCodeMotion && info->deoptimize_on_exception()) { 1887 LIR_Opr obj = new_register(T_OBJECT); 1888 __ move(LIR_OprFact::oopConst(NULL), obj); 1889 __ null_check(obj, new CodeEmitInfo(info)); 1890 } 1891 } 1892 __ load(new LIR_Address(array.result(), arrayOopDesc::length_offset_in_bytes(), T_INT), reg, info, lir_patch_none); 1893 } 1894 1895 1896 void LIRGenerator::do_LoadIndexed(LoadIndexed* x) { 1897 bool use_length = x->length() != NULL; 1898 LIRItem array(x->array(), this); 1899 LIRItem index(x->index(), this); 1900 LIRItem length(this); 1901 bool needs_range_check = x->compute_needs_range_check(); 1902 1903 if (use_length && needs_range_check) { 1904 length.set_instruction(x->length()); 1905 length.load_item(); 1906 } 1907 1908 array.load_item(); 1909 if (index.is_constant() && can_inline_as_constant(x->index())) { 1910 // let it be a constant 1911 index.dont_load_item(); 1912 } else { 1913 index.load_item(); 1914 } 1915 1916 CodeEmitInfo* range_check_info = state_for(x); 1917 CodeEmitInfo* null_check_info = NULL; 1918 if (x->needs_null_check()) { 1919 NullCheck* nc = x->explicit_null_check(); 1920 if (nc != NULL) { 1921 null_check_info = state_for(nc); 1922 } else { 1923 null_check_info = range_check_info; 1924 } 1925 if (StressLoopInvariantCodeMotion && null_check_info->deoptimize_on_exception()) { 1926 LIR_Opr obj = new_register(T_OBJECT); 1927 __ move(LIR_OprFact::oopConst(NULL), obj); 1928 __ null_check(obj, new CodeEmitInfo(null_check_info)); 1929 } 1930 } 1931 1932 // emit array address setup early so it schedules better 1933 LIR_Address* array_addr = emit_array_address(array.result(), index.result(), x->elt_type(), false); 1934 1935 if (GenerateRangeChecks && needs_range_check) { 1936 if (StressLoopInvariantCodeMotion && range_check_info->deoptimize_on_exception()) { 1937 __ branch(lir_cond_always, T_ILLEGAL, new RangeCheckStub(range_check_info, index.result())); 1938 } else if (use_length) { 1939 // TODO: use a (modified) version of array_range_check that does not require a 1940 // constant length to be loaded to a register 1941 __ cmp(lir_cond_belowEqual, length.result(), index.result()); 1942 __ branch(lir_cond_belowEqual, T_INT, new RangeCheckStub(range_check_info, index.result())); 1943 } else { 1944 array_range_check(array.result(), index.result(), null_check_info, range_check_info); 1945 // The range check performs the null check, so clear it out for the load 1946 null_check_info = NULL; 1947 } 1948 } 1949 1950 __ move(array_addr, rlock_result(x, x->elt_type()), null_check_info); 1951 } 1952 1953 1954 void LIRGenerator::do_NullCheck(NullCheck* x) { 1955 if (x->can_trap()) { 1956 LIRItem value(x->obj(), this); 1957 value.load_item(); 1958 CodeEmitInfo* info = state_for(x); 1959 __ null_check(value.result(), info); 1960 } 1961 } 1962 1963 1964 void LIRGenerator::do_TypeCast(TypeCast* x) { 1965 LIRItem value(x->obj(), this); 1966 value.load_item(); 1967 // the result is the same as from the node we are casting 1968 set_result(x, value.result()); 1969 } 1970 1971 1972 void LIRGenerator::do_Throw(Throw* x) { 1973 LIRItem exception(x->exception(), this); 1974 exception.load_item(); 1975 set_no_result(x); 1976 LIR_Opr exception_opr = exception.result(); 1977 CodeEmitInfo* info = state_for(x, x->state()); 1978 1979 #ifndef PRODUCT 1980 if (PrintC1Statistics) { 1981 increment_counter(Runtime1::throw_count_address(), T_INT); 1982 } 1983 #endif 1984 1985 // check if the instruction has an xhandler in any of the nested scopes 1986 bool unwind = false; 1987 if (info->exception_handlers()->length() == 0) { 1988 // this throw is not inside an xhandler 1989 unwind = true; 1990 } else { 1991 // get some idea of the throw type 1992 bool type_is_exact = true; 1993 ciType* throw_type = x->exception()->exact_type(); 1994 if (throw_type == NULL) { 1995 type_is_exact = false; 1996 throw_type = x->exception()->declared_type(); 1997 } 1998 if (throw_type != NULL && throw_type->is_instance_klass()) { 1999 ciInstanceKlass* throw_klass = (ciInstanceKlass*)throw_type; 2000 unwind = !x->exception_handlers()->could_catch(throw_klass, type_is_exact); 2001 } 2002 } 2003 2004 // do null check before moving exception oop into fixed register 2005 // to avoid a fixed interval with an oop during the null check. 2006 // Use a copy of the CodeEmitInfo because debug information is 2007 // different for null_check and throw. 2008 if (GenerateCompilerNullChecks && 2009 (x->exception()->as_NewInstance() == NULL && x->exception()->as_ExceptionObject() == NULL)) { 2010 // if the exception object wasn't created using new then it might be null. 2011 __ null_check(exception_opr, new CodeEmitInfo(info, x->state()->copy(ValueStack::ExceptionState, x->state()->bci()))); 2012 } 2013 2014 if (compilation()->env()->jvmti_can_post_on_exceptions()) { 2015 // we need to go through the exception lookup path to get JVMTI 2016 // notification done 2017 unwind = false; 2018 } 2019 2020 // move exception oop into fixed register 2021 __ move(exception_opr, exceptionOopOpr()); 2022 2023 if (unwind) { 2024 __ unwind_exception(exceptionOopOpr()); 2025 } else { 2026 __ throw_exception(exceptionPcOpr(), exceptionOopOpr(), info); 2027 } 2028 } 2029 2030 2031 void LIRGenerator::do_RoundFP(RoundFP* x) { 2032 LIRItem input(x->input(), this); 2033 input.load_item(); 2034 LIR_Opr input_opr = input.result(); 2035 assert(input_opr->is_register(), "why round if value is not in a register?"); 2036 assert(input_opr->is_single_fpu() || input_opr->is_double_fpu(), "input should be floating-point value"); 2037 if (input_opr->is_single_fpu()) { 2038 set_result(x, round_item(input_opr)); // This code path not currently taken 2039 } else { 2040 LIR_Opr result = new_register(T_DOUBLE); 2041 set_vreg_flag(result, must_start_in_memory); 2042 __ roundfp(input_opr, LIR_OprFact::illegalOpr, result); 2043 set_result(x, result); 2044 } 2045 } 2046 2047 // Here UnsafeGetRaw may have x->base() and x->index() be int or long 2048 // on both 64 and 32 bits. Expecting x->base() to be always long on 64bit. 2049 void LIRGenerator::do_UnsafeGetRaw(UnsafeGetRaw* x) { 2050 LIRItem base(x->base(), this); 2051 LIRItem idx(this); 2052 2053 base.load_item(); 2054 if (x->has_index()) { 2055 idx.set_instruction(x->index()); 2056 idx.load_nonconstant(); 2057 } 2058 2059 LIR_Opr reg = rlock_result(x, x->basic_type()); 2060 2061 int log2_scale = 0; 2062 if (x->has_index()) { 2063 log2_scale = x->log2_scale(); 2064 } 2065 2066 assert(!x->has_index() || idx.value() == x->index(), "should match"); 2067 2068 LIR_Opr base_op = base.result(); 2069 LIR_Opr index_op = idx.result(); 2070 #ifndef _LP64 2071 if (base_op->type() == T_LONG) { 2072 base_op = new_register(T_INT); 2073 __ convert(Bytecodes::_l2i, base.result(), base_op); 2074 } 2075 if (x->has_index()) { 2076 if (index_op->type() == T_LONG) { 2077 LIR_Opr long_index_op = index_op; 2078 if (index_op->is_constant()) { 2079 long_index_op = new_register(T_LONG); 2080 __ move(index_op, long_index_op); 2081 } 2082 index_op = new_register(T_INT); 2083 __ convert(Bytecodes::_l2i, long_index_op, index_op); 2084 } else { 2085 assert(x->index()->type()->tag() == intTag, "must be"); 2086 } 2087 } 2088 // At this point base and index should be all ints. 2089 assert(base_op->type() == T_INT && !base_op->is_constant(), "base should be an non-constant int"); 2090 assert(!x->has_index() || index_op->type() == T_INT, "index should be an int"); 2091 #else 2092 if (x->has_index()) { 2093 if (index_op->type() == T_INT) { 2094 if (!index_op->is_constant()) { 2095 index_op = new_register(T_LONG); 2096 __ convert(Bytecodes::_i2l, idx.result(), index_op); 2097 } 2098 } else { 2099 assert(index_op->type() == T_LONG, "must be"); 2100 if (index_op->is_constant()) { 2101 index_op = new_register(T_LONG); 2102 __ move(idx.result(), index_op); 2103 } 2104 } 2105 } 2106 // At this point base is a long non-constant 2107 // Index is a long register or a int constant. 2108 // We allow the constant to stay an int because that would allow us a more compact encoding by 2109 // embedding an immediate offset in the address expression. If we have a long constant, we have to 2110 // move it into a register first. 2111 assert(base_op->type() == T_LONG && !base_op->is_constant(), "base must be a long non-constant"); 2112 assert(!x->has_index() || (index_op->type() == T_INT && index_op->is_constant()) || 2113 (index_op->type() == T_LONG && !index_op->is_constant()), "unexpected index type"); 2114 #endif 2115 2116 BasicType dst_type = x->basic_type(); 2117 2118 LIR_Address* addr; 2119 if (index_op->is_constant()) { 2120 assert(log2_scale == 0, "must not have a scale"); 2121 assert(index_op->type() == T_INT, "only int constants supported"); 2122 addr = new LIR_Address(base_op, index_op->as_jint(), dst_type); 2123 } else { 2124 #ifdef X86 2125 addr = new LIR_Address(base_op, index_op, LIR_Address::Scale(log2_scale), 0, dst_type); 2126 #elif defined(ARM) 2127 addr = generate_address(base_op, index_op, log2_scale, 0, dst_type); 2128 #else 2129 if (index_op->is_illegal() || log2_scale == 0) { 2130 addr = new LIR_Address(base_op, index_op, dst_type); 2131 } else { 2132 LIR_Opr tmp = new_pointer_register(); 2133 __ shift_left(index_op, log2_scale, tmp); 2134 addr = new LIR_Address(base_op, tmp, dst_type); 2135 } 2136 #endif 2137 } 2138 2139 if (x->may_be_unaligned() && (dst_type == T_LONG || dst_type == T_DOUBLE)) { 2140 __ unaligned_move(addr, reg); 2141 } else { 2142 if (dst_type == T_OBJECT && x->is_wide()) { 2143 __ move_wide(addr, reg); 2144 } else { 2145 __ move(addr, reg); 2146 } 2147 } 2148 } 2149 2150 2151 void LIRGenerator::do_UnsafePutRaw(UnsafePutRaw* x) { 2152 int log2_scale = 0; 2153 BasicType type = x->basic_type(); 2154 2155 if (x->has_index()) { 2156 log2_scale = x->log2_scale(); 2157 } 2158 2159 LIRItem base(x->base(), this); 2160 LIRItem value(x->value(), this); 2161 LIRItem idx(this); 2162 2163 base.load_item(); 2164 if (x->has_index()) { 2165 idx.set_instruction(x->index()); 2166 idx.load_item(); 2167 } 2168 2169 if (type == T_BYTE || type == T_BOOLEAN) { 2170 value.load_byte_item(); 2171 } else { 2172 value.load_item(); 2173 } 2174 2175 set_no_result(x); 2176 2177 LIR_Opr base_op = base.result(); 2178 LIR_Opr index_op = idx.result(); 2179 2180 #ifndef _LP64 2181 if (base_op->type() == T_LONG) { 2182 base_op = new_register(T_INT); 2183 __ convert(Bytecodes::_l2i, base.result(), base_op); 2184 } 2185 if (x->has_index()) { 2186 if (index_op->type() == T_LONG) { 2187 index_op = new_register(T_INT); 2188 __ convert(Bytecodes::_l2i, idx.result(), index_op); 2189 } 2190 } 2191 // At this point base and index should be all ints and not constants 2192 assert(base_op->type() == T_INT && !base_op->is_constant(), "base should be an non-constant int"); 2193 assert(!x->has_index() || (index_op->type() == T_INT && !index_op->is_constant()), "index should be an non-constant int"); 2194 #else 2195 if (x->has_index()) { 2196 if (index_op->type() == T_INT) { 2197 index_op = new_register(T_LONG); 2198 __ convert(Bytecodes::_i2l, idx.result(), index_op); 2199 } 2200 } 2201 // At this point base and index are long and non-constant 2202 assert(base_op->type() == T_LONG && !base_op->is_constant(), "base must be a non-constant long"); 2203 assert(!x->has_index() || (index_op->type() == T_LONG && !index_op->is_constant()), "index must be a non-constant long"); 2204 #endif 2205 2206 if (log2_scale != 0) { 2207 // temporary fix (platform dependent code without shift on Intel would be better) 2208 // TODO: ARM also allows embedded shift in the address 2209 __ shift_left(index_op, log2_scale, index_op); 2210 } 2211 2212 LIR_Address* addr = new LIR_Address(base_op, index_op, x->basic_type()); 2213 __ move(value.result(), addr); 2214 } 2215 2216 2217 void LIRGenerator::do_UnsafeGetObject(UnsafeGetObject* x) { 2218 BasicType type = x->basic_type(); 2219 LIRItem src(x->object(), this); 2220 LIRItem off(x->offset(), this); 2221 2222 off.load_item(); 2223 src.load_item(); 2224 2225 LIR_Opr value = rlock_result(x, x->basic_type()); 2226 2227 get_Object_unsafe(value, src.result(), off.result(), type, x->is_volatile()); 2228 2229 #if INCLUDE_ALL_GCS 2230 // We might be reading the value of the referent field of a 2231 // Reference object in order to attach it back to the live 2232 // object graph. If G1 is enabled then we need to record 2233 // the value that is being returned in an SATB log buffer. 2234 // 2235 // We need to generate code similar to the following... 2236 // 2237 // if (offset == java_lang_ref_Reference::referent_offset) { 2238 // if (src != NULL) { 2239 // if (klass(src)->reference_type() != REF_NONE) { 2240 // pre_barrier(..., value, ...); 2241 // } 2242 // } 2243 // } 2244 2245 if (UseG1GC && type == T_OBJECT) { 2246 bool gen_pre_barrier = true; // Assume we need to generate pre_barrier. 2247 bool gen_offset_check = true; // Assume we need to generate the offset guard. 2248 bool gen_source_check = true; // Assume we need to check the src object for null. 2249 bool gen_type_check = true; // Assume we need to check the reference_type. 2250 2251 if (off.is_constant()) { 2252 jlong off_con = (off.type()->is_int() ? 2253 (jlong) off.get_jint_constant() : 2254 off.get_jlong_constant()); 2255 2256 2257 if (off_con != (jlong) java_lang_ref_Reference::referent_offset) { 2258 // The constant offset is something other than referent_offset. 2259 // We can skip generating/checking the remaining guards and 2260 // skip generation of the code stub. 2261 gen_pre_barrier = false; 2262 } else { 2263 // The constant offset is the same as referent_offset - 2264 // we do not need to generate a runtime offset check. 2265 gen_offset_check = false; 2266 } 2267 } 2268 2269 // We don't need to generate stub if the source object is an array 2270 if (gen_pre_barrier && src.type()->is_array()) { 2271 gen_pre_barrier = false; 2272 } 2273 2274 if (gen_pre_barrier) { 2275 // We still need to continue with the checks. 2276 if (src.is_constant()) { 2277 ciObject* src_con = src.get_jobject_constant(); 2278 guarantee(src_con != NULL, "no source constant"); 2279 2280 if (src_con->is_null_object()) { 2281 // The constant src object is null - We can skip 2282 // generating the code stub. 2283 gen_pre_barrier = false; 2284 } else { 2285 // Non-null constant source object. We still have to generate 2286 // the slow stub - but we don't need to generate the runtime 2287 // null object check. 2288 gen_source_check = false; 2289 } 2290 } 2291 } 2292 if (gen_pre_barrier && !PatchALot) { 2293 // Can the klass of object be statically determined to be 2294 // a sub-class of Reference? 2295 ciType* type = src.value()->declared_type(); 2296 if ((type != NULL) && type->is_loaded()) { 2297 if (type->is_subtype_of(compilation()->env()->Reference_klass())) { 2298 gen_type_check = false; 2299 } else if (type->is_klass() && 2300 !compilation()->env()->Object_klass()->is_subtype_of(type->as_klass())) { 2301 // Not Reference and not Object klass. 2302 gen_pre_barrier = false; 2303 } 2304 } 2305 } 2306 2307 if (gen_pre_barrier) { 2308 LabelObj* Lcont = new LabelObj(); 2309 2310 // We can have generate one runtime check here. Let's start with 2311 // the offset check. 2312 if (gen_offset_check) { 2313 // if (offset != referent_offset) -> continue 2314 // If offset is an int then we can do the comparison with the 2315 // referent_offset constant; otherwise we need to move 2316 // referent_offset into a temporary register and generate 2317 // a reg-reg compare. 2318 2319 LIR_Opr referent_off; 2320 2321 if (off.type()->is_int()) { 2322 referent_off = LIR_OprFact::intConst(java_lang_ref_Reference::referent_offset); 2323 } else { 2324 assert(off.type()->is_long(), "what else?"); 2325 referent_off = new_register(T_LONG); 2326 __ move(LIR_OprFact::longConst(java_lang_ref_Reference::referent_offset), referent_off); 2327 } 2328 __ cmp(lir_cond_notEqual, off.result(), referent_off); 2329 __ branch(lir_cond_notEqual, as_BasicType(off.type()), Lcont->label()); 2330 } 2331 if (gen_source_check) { 2332 // offset is a const and equals referent offset 2333 // if (source == null) -> continue 2334 __ cmp(lir_cond_equal, src.result(), LIR_OprFact::oopConst(NULL)); 2335 __ branch(lir_cond_equal, T_OBJECT, Lcont->label()); 2336 } 2337 LIR_Opr src_klass = new_register(T_OBJECT); 2338 if (gen_type_check) { 2339 // We have determined that offset == referent_offset && src != null. 2340 // if (src->_klass->_reference_type == REF_NONE) -> continue 2341 __ move(new LIR_Address(src.result(), oopDesc::klass_offset_in_bytes(), T_ADDRESS), src_klass); 2342 LIR_Address* reference_type_addr = new LIR_Address(src_klass, in_bytes(InstanceKlass::reference_type_offset()), T_BYTE); 2343 LIR_Opr reference_type = new_register(T_INT); 2344 __ move(reference_type_addr, reference_type); 2345 __ cmp(lir_cond_equal, reference_type, LIR_OprFact::intConst(REF_NONE)); 2346 __ branch(lir_cond_equal, T_INT, Lcont->label()); 2347 } 2348 { 2349 // We have determined that src->_klass->_reference_type != REF_NONE 2350 // so register the value in the referent field with the pre-barrier. 2351 pre_barrier(LIR_OprFact::illegalOpr /* addr_opr */, 2352 value /* pre_val */, 2353 false /* do_load */, 2354 false /* patch */, 2355 NULL /* info */); 2356 } 2357 __ branch_destination(Lcont->label()); 2358 } 2359 } 2360 #endif // INCLUDE_ALL_GCS 2361 2362 if (x->is_volatile() && os::is_MP()) __ membar_acquire(); 2363 } 2364 2365 2366 void LIRGenerator::do_UnsafePutObject(UnsafePutObject* x) { 2367 BasicType type = x->basic_type(); 2368 LIRItem src(x->object(), this); 2369 LIRItem off(x->offset(), this); 2370 LIRItem data(x->value(), this); 2371 2372 src.load_item(); 2373 if (type == T_BOOLEAN || type == T_BYTE) { 2374 data.load_byte_item(); 2375 } else { 2376 data.load_item(); 2377 } 2378 off.load_item(); 2379 2380 set_no_result(x); 2381 2382 if (x->is_volatile() && os::is_MP()) __ membar_release(); 2383 put_Object_unsafe(src.result(), off.result(), data.result(), type, x->is_volatile()); 2384 if (x->is_volatile() && os::is_MP()) __ membar(); 2385 } 2386 2387 2388 void LIRGenerator::do_UnsafePrefetch(UnsafePrefetch* x, bool is_store) { 2389 LIRItem src(x->object(), this); 2390 LIRItem off(x->offset(), this); 2391 2392 src.load_item(); 2393 if (off.is_constant() && can_inline_as_constant(x->offset())) { 2394 // let it be a constant 2395 off.dont_load_item(); 2396 } else { 2397 off.load_item(); 2398 } 2399 2400 set_no_result(x); 2401 2402 LIR_Address* addr = generate_address(src.result(), off.result(), 0, 0, T_BYTE); 2403 __ prefetch(addr, is_store); 2404 } 2405 2406 2407 void LIRGenerator::do_UnsafePrefetchRead(UnsafePrefetchRead* x) { 2408 do_UnsafePrefetch(x, false); 2409 } 2410 2411 2412 void LIRGenerator::do_UnsafePrefetchWrite(UnsafePrefetchWrite* x) { 2413 do_UnsafePrefetch(x, true); 2414 } 2415 2416 2417 void LIRGenerator::do_SwitchRanges(SwitchRangeArray* x, LIR_Opr value, BlockBegin* default_sux) { 2418 int lng = x->length(); 2419 2420 for (int i = 0; i < lng; i++) { 2421 SwitchRange* one_range = x->at(i); 2422 int low_key = one_range->low_key(); 2423 int high_key = one_range->high_key(); 2424 BlockBegin* dest = one_range->sux(); 2425 if (low_key == high_key) { 2426 __ cmp(lir_cond_equal, value, low_key); 2427 __ branch(lir_cond_equal, T_INT, dest); 2428 } else if (high_key - low_key == 1) { 2429 __ cmp(lir_cond_equal, value, low_key); 2430 __ branch(lir_cond_equal, T_INT, dest); 2431 __ cmp(lir_cond_equal, value, high_key); 2432 __ branch(lir_cond_equal, T_INT, dest); 2433 } else { 2434 LabelObj* L = new LabelObj(); 2435 __ cmp(lir_cond_less, value, low_key); 2436 __ branch(lir_cond_less, T_INT, L->label()); 2437 __ cmp(lir_cond_lessEqual, value, high_key); 2438 __ branch(lir_cond_lessEqual, T_INT, dest); 2439 __ branch_destination(L->label()); 2440 } 2441 } 2442 __ jump(default_sux); 2443 } 2444 2445 2446 SwitchRangeArray* LIRGenerator::create_lookup_ranges(TableSwitch* x) { 2447 SwitchRangeList* res = new SwitchRangeList(); 2448 int len = x->length(); 2449 if (len > 0) { 2450 BlockBegin* sux = x->sux_at(0); 2451 int key = x->lo_key(); 2452 BlockBegin* default_sux = x->default_sux(); 2453 SwitchRange* range = new SwitchRange(key, sux); 2454 for (int i = 0; i < len; i++, key++) { 2455 BlockBegin* new_sux = x->sux_at(i); 2456 if (sux == new_sux) { 2457 // still in same range 2458 range->set_high_key(key); 2459 } else { 2460 // skip tests which explicitly dispatch to the default 2461 if (sux != default_sux) { 2462 res->append(range); 2463 } 2464 range = new SwitchRange(key, new_sux); 2465 } 2466 sux = new_sux; 2467 } 2468 if (res->length() == 0 || res->last() != range) res->append(range); 2469 } 2470 return res; 2471 } 2472 2473 2474 // we expect the keys to be sorted by increasing value 2475 SwitchRangeArray* LIRGenerator::create_lookup_ranges(LookupSwitch* x) { 2476 SwitchRangeList* res = new SwitchRangeList(); 2477 int len = x->length(); 2478 if (len > 0) { 2479 BlockBegin* default_sux = x->default_sux(); 2480 int key = x->key_at(0); 2481 BlockBegin* sux = x->sux_at(0); 2482 SwitchRange* range = new SwitchRange(key, sux); 2483 for (int i = 1; i < len; i++) { 2484 int new_key = x->key_at(i); 2485 BlockBegin* new_sux = x->sux_at(i); 2486 if (key+1 == new_key && sux == new_sux) { 2487 // still in same range 2488 range->set_high_key(new_key); 2489 } else { 2490 // skip tests which explicitly dispatch to the default 2491 if (range->sux() != default_sux) { 2492 res->append(range); 2493 } 2494 range = new SwitchRange(new_key, new_sux); 2495 } 2496 key = new_key; 2497 sux = new_sux; 2498 } 2499 if (res->length() == 0 || res->last() != range) res->append(range); 2500 } 2501 return res; 2502 } 2503 2504 2505 void LIRGenerator::do_TableSwitch(TableSwitch* x) { 2506 LIRItem tag(x->tag(), this); 2507 tag.load_item(); 2508 set_no_result(x); 2509 2510 if (x->is_safepoint()) { 2511 __ safepoint(safepoint_poll_register(), state_for(x, x->state_before())); 2512 } 2513 2514 // move values into phi locations 2515 move_to_phi(x->state()); 2516 2517 int lo_key = x->lo_key(); 2518 int hi_key = x->hi_key(); 2519 int len = x->length(); 2520 LIR_Opr value = tag.result(); 2521 if (UseTableRanges) { 2522 do_SwitchRanges(create_lookup_ranges(x), value, x->default_sux()); 2523 } else { 2524 for (int i = 0; i < len; i++) { 2525 __ cmp(lir_cond_equal, value, i + lo_key); 2526 __ branch(lir_cond_equal, T_INT, x->sux_at(i)); 2527 } 2528 __ jump(x->default_sux()); 2529 } 2530 } 2531 2532 2533 void LIRGenerator::do_LookupSwitch(LookupSwitch* x) { 2534 LIRItem tag(x->tag(), this); 2535 tag.load_item(); 2536 set_no_result(x); 2537 2538 if (x->is_safepoint()) { 2539 __ safepoint(safepoint_poll_register(), state_for(x, x->state_before())); 2540 } 2541 2542 // move values into phi locations 2543 move_to_phi(x->state()); 2544 2545 LIR_Opr value = tag.result(); 2546 if (UseTableRanges) { 2547 do_SwitchRanges(create_lookup_ranges(x), value, x->default_sux()); 2548 } else { 2549 int len = x->length(); 2550 for (int i = 0; i < len; i++) { 2551 __ cmp(lir_cond_equal, value, x->key_at(i)); 2552 __ branch(lir_cond_equal, T_INT, x->sux_at(i)); 2553 } 2554 __ jump(x->default_sux()); 2555 } 2556 } 2557 2558 2559 void LIRGenerator::do_Goto(Goto* x) { 2560 set_no_result(x); 2561 2562 if (block()->next()->as_OsrEntry()) { 2563 // need to free up storage used for OSR entry point 2564 LIR_Opr osrBuffer = block()->next()->operand(); 2565 BasicTypeList signature; 2566 signature.append(NOT_LP64(T_INT) LP64_ONLY(T_LONG)); // pass a pointer to osrBuffer 2567 CallingConvention* cc = frame_map()->c_calling_convention(&signature); 2568 __ move(osrBuffer, cc->args()->at(0)); 2569 __ call_runtime_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::OSR_migration_end), 2570 getThreadTemp(), LIR_OprFact::illegalOpr, cc->args()); 2571 } 2572 2573 if (x->is_safepoint()) { 2574 ValueStack* state = x->state_before() ? x->state_before() : x->state(); 2575 2576 // increment backedge counter if needed 2577 CodeEmitInfo* info = state_for(x, state); 2578 increment_backedge_counter(info, x->profiled_bci()); 2579 CodeEmitInfo* safepoint_info = state_for(x, state); 2580 __ safepoint(safepoint_poll_register(), safepoint_info); 2581 } 2582 2583 // Gotos can be folded Ifs, handle this case. 2584 if (x->should_profile()) { 2585 ciMethod* method = x->profiled_method(); 2586 assert(method != NULL, "method should be set if branch is profiled"); 2587 ciMethodData* md = method->method_data_or_null(); 2588 assert(md != NULL, "Sanity"); 2589 ciProfileData* data = md->bci_to_data(x->profiled_bci()); 2590 assert(data != NULL, "must have profiling data"); 2591 int offset; 2592 if (x->direction() == Goto::taken) { 2593 assert(data->is_BranchData(), "need BranchData for two-way branches"); 2594 offset = md->byte_offset_of_slot(data, BranchData::taken_offset()); 2595 } else if (x->direction() == Goto::not_taken) { 2596 assert(data->is_BranchData(), "need BranchData for two-way branches"); 2597 offset = md->byte_offset_of_slot(data, BranchData::not_taken_offset()); 2598 } else { 2599 assert(data->is_JumpData(), "need JumpData for branches"); 2600 offset = md->byte_offset_of_slot(data, JumpData::taken_offset()); 2601 } 2602 LIR_Opr md_reg = new_register(T_METADATA); 2603 __ metadata2reg(md->constant_encoding(), md_reg); 2604 2605 increment_counter(new LIR_Address(md_reg, offset, 2606 NOT_LP64(T_INT) LP64_ONLY(T_LONG)), DataLayout::counter_increment); 2607 } 2608 2609 // emit phi-instruction move after safepoint since this simplifies 2610 // describing the state as the safepoint. 2611 move_to_phi(x->state()); 2612 2613 __ jump(x->default_sux()); 2614 } 2615 2616 /** 2617 * Emit profiling code if needed for arguments, parameters, return value types 2618 * 2619 * @param md MDO the code will update at runtime 2620 * @param md_base_offset common offset in the MDO for this profile and subsequent ones 2621 * @param md_offset offset in the MDO (on top of md_base_offset) for this profile 2622 * @param profiled_k current profile 2623 * @param obj IR node for the object to be profiled 2624 * @param mdp register to hold the pointer inside the MDO (md + md_base_offset). 2625 * Set once we find an update to make and use for next ones. 2626 * @param not_null true if we know obj cannot be null 2627 * @param signature_at_call_k signature at call for obj 2628 * @param callee_signature_k signature of callee for obj 2629 * at call and callee signatures differ at method handle call 2630 * @return the only klass we know will ever be seen at this profile point 2631 */ 2632 ciKlass* LIRGenerator::profile_type(ciMethodData* md, int md_base_offset, int md_offset, intptr_t profiled_k, 2633 Value obj, LIR_Opr& mdp, bool not_null, ciKlass* signature_at_call_k, 2634 ciKlass* callee_signature_k) { 2635 ciKlass* result = NULL; 2636 bool do_null = !not_null && !TypeEntries::was_null_seen(profiled_k); 2637 bool do_update = !TypeEntries::is_type_unknown(profiled_k); 2638 // known not to be null or null bit already set and already set to 2639 // unknown: nothing we can do to improve profiling 2640 if (!do_null && !do_update) { 2641 return result; 2642 } 2643 2644 ciKlass* exact_klass = NULL; 2645 Compilation* comp = Compilation::current(); 2646 if (do_update) { 2647 // try to find exact type, using CHA if possible, so that loading 2648 // the klass from the object can be avoided 2649 ciType* type = obj->exact_type(); 2650 if (type == NULL) { 2651 type = obj->declared_type(); 2652 type = comp->cha_exact_type(type); 2653 } 2654 assert(type == NULL || type->is_klass(), "type should be class"); 2655 exact_klass = (type != NULL && type->is_loaded()) ? (ciKlass*)type : NULL; 2656 2657 do_update = exact_klass == NULL || ciTypeEntries::valid_ciklass(profiled_k) != exact_klass; 2658 } 2659 2660 if (!do_null && !do_update) { 2661 return result; 2662 } 2663 2664 ciKlass* exact_signature_k = NULL; 2665 if (do_update) { 2666 // Is the type from the signature exact (the only one possible)? 2667 exact_signature_k = signature_at_call_k->exact_klass(); 2668 if (exact_signature_k == NULL) { 2669 exact_signature_k = comp->cha_exact_type(signature_at_call_k); 2670 } else { 2671 result = exact_signature_k; 2672 // Known statically. No need to emit any code: prevent 2673 // LIR_Assembler::emit_profile_type() from emitting useless code 2674 profiled_k = ciTypeEntries::with_status(result, profiled_k); 2675 } 2676 // exact_klass and exact_signature_k can be both non NULL but 2677 // different if exact_klass is loaded after the ciObject for 2678 // exact_signature_k is created. 2679 if (exact_klass == NULL && exact_signature_k != NULL && exact_klass != exact_signature_k) { 2680 // sometimes the type of the signature is better than the best type 2681 // the compiler has 2682 exact_klass = exact_signature_k; 2683 } 2684 if (callee_signature_k != NULL && 2685 callee_signature_k != signature_at_call_k) { 2686 ciKlass* improved_klass = callee_signature_k->exact_klass(); 2687 if (improved_klass == NULL) { 2688 improved_klass = comp->cha_exact_type(callee_signature_k); 2689 } 2690 if (exact_klass == NULL && improved_klass != NULL && exact_klass != improved_klass) { 2691 exact_klass = exact_signature_k; 2692 } 2693 } 2694 do_update = exact_klass == NULL || ciTypeEntries::valid_ciklass(profiled_k) != exact_klass; 2695 } 2696 2697 if (!do_null && !do_update) { 2698 return result; 2699 } 2700 2701 if (mdp == LIR_OprFact::illegalOpr) { 2702 mdp = new_register(T_METADATA); 2703 __ metadata2reg(md->constant_encoding(), mdp); 2704 if (md_base_offset != 0) { 2705 LIR_Address* base_type_address = new LIR_Address(mdp, md_base_offset, T_ADDRESS); 2706 mdp = new_pointer_register(); 2707 __ leal(LIR_OprFact::address(base_type_address), mdp); 2708 } 2709 } 2710 LIRItem value(obj, this); 2711 value.load_item(); 2712 __ profile_type(new LIR_Address(mdp, md_offset, T_METADATA), 2713 value.result(), exact_klass, profiled_k, new_pointer_register(), not_null, exact_signature_k != NULL); 2714 return result; 2715 } 2716 2717 // profile parameters on entry to the root of the compilation 2718 void LIRGenerator::profile_parameters(Base* x) { 2719 if (compilation()->profile_parameters()) { 2720 CallingConvention* args = compilation()->frame_map()->incoming_arguments(); 2721 ciMethodData* md = scope()->method()->method_data_or_null(); 2722 assert(md != NULL, "Sanity"); 2723 2724 if (md->parameters_type_data() != NULL) { 2725 ciParametersTypeData* parameters_type_data = md->parameters_type_data(); 2726 ciTypeStackSlotEntries* parameters = parameters_type_data->parameters(); 2727 LIR_Opr mdp = LIR_OprFact::illegalOpr; 2728 for (int java_index = 0, i = 0, j = 0; j < parameters_type_data->number_of_parameters(); i++) { 2729 LIR_Opr src = args->at(i); 2730 assert(!src->is_illegal(), "check"); 2731 BasicType t = src->type(); 2732 if (t == T_OBJECT || t == T_ARRAY) { 2733 intptr_t profiled_k = parameters->type(j); 2734 Local* local = x->state()->local_at(java_index)->as_Local(); 2735 ciKlass* exact = profile_type(md, md->byte_offset_of_slot(parameters_type_data, ParametersTypeData::type_offset(0)), 2736 in_bytes(ParametersTypeData::type_offset(j)) - in_bytes(ParametersTypeData::type_offset(0)), 2737 profiled_k, local, mdp, false, local->declared_type()->as_klass(), NULL); 2738 // If the profile is known statically set it once for all and do not emit any code 2739 if (exact != NULL) { 2740 md->set_parameter_type(j, exact); 2741 } 2742 j++; 2743 } 2744 java_index += type2size[t]; 2745 } 2746 } 2747 } 2748 } 2749 2750 void LIRGenerator::do_Base(Base* x) { 2751 __ std_entry(LIR_OprFact::illegalOpr); 2752 // Emit moves from physical registers / stack slots to virtual registers 2753 CallingConvention* args = compilation()->frame_map()->incoming_arguments(); 2754 IRScope* irScope = compilation()->hir()->top_scope(); 2755 int java_index = 0; 2756 for (int i = 0; i < args->length(); i++) { 2757 LIR_Opr src = args->at(i); 2758 assert(!src->is_illegal(), "check"); 2759 BasicType t = src->type(); 2760 2761 // Types which are smaller than int are passed as int, so 2762 // correct the type which passed. 2763 switch (t) { 2764 case T_BYTE: 2765 case T_BOOLEAN: 2766 case T_SHORT: 2767 case T_CHAR: 2768 t = T_INT; 2769 break; 2770 } 2771 2772 LIR_Opr dest = new_register(t); 2773 __ move(src, dest); 2774 2775 // Assign new location to Local instruction for this local 2776 Local* local = x->state()->local_at(java_index)->as_Local(); 2777 assert(local != NULL, "Locals for incoming arguments must have been created"); 2778 #ifndef __SOFTFP__ 2779 // The java calling convention passes double as long and float as int. 2780 assert(as_ValueType(t)->tag() == local->type()->tag(), "check"); 2781 #endif // __SOFTFP__ 2782 local->set_operand(dest); 2783 _instruction_for_operand.at_put_grow(dest->vreg_number(), local, NULL); 2784 java_index += type2size[t]; 2785 } 2786 2787 if (compilation()->env()->dtrace_method_probes()) { 2788 BasicTypeList signature; 2789 signature.append(LP64_ONLY(T_LONG) NOT_LP64(T_INT)); // thread 2790 signature.append(T_METADATA); // Method* 2791 LIR_OprList* args = new LIR_OprList(); 2792 args->append(getThreadPointer()); 2793 LIR_Opr meth = new_register(T_METADATA); 2794 __ metadata2reg(method()->constant_encoding(), meth); 2795 args->append(meth); 2796 call_runtime(&signature, args, CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_entry), voidType, NULL); 2797 } 2798 2799 if (method()->is_synchronized()) { 2800 LIR_Opr obj; 2801 if (method()->is_static()) { 2802 obj = new_register(T_OBJECT); 2803 __ oop2reg(method()->holder()->java_mirror()->constant_encoding(), obj); 2804 } else { 2805 Local* receiver = x->state()->local_at(0)->as_Local(); 2806 assert(receiver != NULL, "must already exist"); 2807 obj = receiver->operand(); 2808 } 2809 assert(obj->is_valid(), "must be valid"); 2810 2811 if (method()->is_synchronized() && GenerateSynchronizationCode) { 2812 LIR_Opr lock = new_register(T_INT); 2813 __ load_stack_address_monitor(0, lock); 2814 2815 CodeEmitInfo* info = new CodeEmitInfo(scope()->start()->state()->copy(ValueStack::StateBefore, SynchronizationEntryBCI), NULL, x->check_flag(Instruction::DeoptimizeOnException)); 2816 CodeStub* slow_path = new MonitorEnterStub(obj, lock, info); 2817 2818 // receiver is guaranteed non-NULL so don't need CodeEmitInfo 2819 __ lock_object(syncTempOpr(), obj, lock, new_register(T_OBJECT), slow_path, NULL); 2820 } 2821 } 2822 if (compilation()->age_code()) { 2823 CodeEmitInfo* info = new CodeEmitInfo(scope()->start()->state()->copy(ValueStack::StateBefore, 0), NULL, false); 2824 decrement_age(info); 2825 } 2826 // increment invocation counters if needed 2827 if (!method()->is_accessor()) { // Accessors do not have MDOs, so no counting. 2828 profile_parameters(x); 2829 CodeEmitInfo* info = new CodeEmitInfo(scope()->start()->state()->copy(ValueStack::StateBefore, SynchronizationEntryBCI), NULL, false); 2830 increment_invocation_counter(info); 2831 } 2832 2833 // all blocks with a successor must end with an unconditional jump 2834 // to the successor even if they are consecutive 2835 __ jump(x->default_sux()); 2836 } 2837 2838 2839 void LIRGenerator::do_OsrEntry(OsrEntry* x) { 2840 // construct our frame and model the production of incoming pointer 2841 // to the OSR buffer. 2842 __ osr_entry(LIR_Assembler::osrBufferPointer()); 2843 LIR_Opr result = rlock_result(x); 2844 __ move(LIR_Assembler::osrBufferPointer(), result); 2845 } 2846 2847 2848 void LIRGenerator::invoke_load_arguments(Invoke* x, LIRItemList* args, const LIR_OprList* arg_list) { 2849 assert(args->length() == arg_list->length(), 2850 err_msg_res("args=%d, arg_list=%d", args->length(), arg_list->length())); 2851 for (int i = x->has_receiver() ? 1 : 0; i < args->length(); i++) { 2852 LIRItem* param = args->at(i); 2853 LIR_Opr loc = arg_list->at(i); 2854 if (loc->is_register()) { 2855 param->load_item_force(loc); 2856 } else { 2857 LIR_Address* addr = loc->as_address_ptr(); 2858 param->load_for_store(addr->type()); 2859 if (addr->type() == T_OBJECT) { 2860 __ move_wide(param->result(), addr); 2861 } else 2862 if (addr->type() == T_LONG || addr->type() == T_DOUBLE) { 2863 __ unaligned_move(param->result(), addr); 2864 } else { 2865 __ move(param->result(), addr); 2866 } 2867 } 2868 } 2869 2870 if (x->has_receiver()) { 2871 LIRItem* receiver = args->at(0); 2872 LIR_Opr loc = arg_list->at(0); 2873 if (loc->is_register()) { 2874 receiver->load_item_force(loc); 2875 } else { 2876 assert(loc->is_address(), "just checking"); 2877 receiver->load_for_store(T_OBJECT); 2878 __ move_wide(receiver->result(), loc->as_address_ptr()); 2879 } 2880 } 2881 } 2882 2883 2884 // Visits all arguments, returns appropriate items without loading them 2885 LIRItemList* LIRGenerator::invoke_visit_arguments(Invoke* x) { 2886 LIRItemList* argument_items = new LIRItemList(); 2887 if (x->has_receiver()) { 2888 LIRItem* receiver = new LIRItem(x->receiver(), this); 2889 argument_items->append(receiver); 2890 } 2891 for (int i = 0; i < x->number_of_arguments(); i++) { 2892 LIRItem* param = new LIRItem(x->argument_at(i), this); 2893 argument_items->append(param); 2894 } 2895 return argument_items; 2896 } 2897 2898 2899 // The invoke with receiver has following phases: 2900 // a) traverse and load/lock receiver; 2901 // b) traverse all arguments -> item-array (invoke_visit_argument) 2902 // c) push receiver on stack 2903 // d) load each of the items and push on stack 2904 // e) unlock receiver 2905 // f) move receiver into receiver-register %o0 2906 // g) lock result registers and emit call operation 2907 // 2908 // Before issuing a call, we must spill-save all values on stack 2909 // that are in caller-save register. "spill-save" moves thos registers 2910 // either in a free callee-save register or spills them if no free 2911 // callee save register is available. 2912 // 2913 // The problem is where to invoke spill-save. 2914 // - if invoked between e) and f), we may lock callee save 2915 // register in "spill-save" that destroys the receiver register 2916 // before f) is executed 2917 // - if we rearange the f) to be earlier, by loading %o0, it 2918 // may destroy a value on the stack that is currently in %o0 2919 // and is waiting to be spilled 2920 // - if we keep the receiver locked while doing spill-save, 2921 // we cannot spill it as it is spill-locked 2922 // 2923 void LIRGenerator::do_Invoke(Invoke* x) { 2924 CallingConvention* cc = frame_map()->java_calling_convention(x->signature(), true); 2925 2926 LIR_OprList* arg_list = cc->args(); 2927 LIRItemList* args = invoke_visit_arguments(x); 2928 LIR_Opr receiver = LIR_OprFact::illegalOpr; 2929 2930 // setup result register 2931 LIR_Opr result_register = LIR_OprFact::illegalOpr; 2932 if (x->type() != voidType) { 2933 result_register = result_register_for(x->type()); 2934 } 2935 2936 CodeEmitInfo* info = state_for(x, x->state()); 2937 2938 invoke_load_arguments(x, args, arg_list); 2939 2940 if (x->has_receiver()) { 2941 args->at(0)->load_item_force(LIR_Assembler::receiverOpr()); 2942 receiver = args->at(0)->result(); 2943 } 2944 2945 // emit invoke code 2946 bool optimized = x->target_is_loaded() && x->target_is_final(); 2947 assert(receiver->is_illegal() || receiver->is_equal(LIR_Assembler::receiverOpr()), "must match"); 2948 2949 // JSR 292 2950 // Preserve the SP over MethodHandle call sites. 2951 ciMethod* target = x->target(); 2952 bool is_method_handle_invoke = (// %%% FIXME: Are both of these relevant? 2953 target->is_method_handle_intrinsic() || 2954 target->is_compiled_lambda_form()); 2955 if (is_method_handle_invoke) { 2956 info->set_is_method_handle_invoke(true); 2957 __ move(FrameMap::stack_pointer(), FrameMap::method_handle_invoke_SP_save_opr()); 2958 } 2959 2960 switch (x->code()) { 2961 case Bytecodes::_invokestatic: 2962 __ call_static(target, result_register, 2963 SharedRuntime::get_resolve_static_call_stub(), 2964 arg_list, info); 2965 break; 2966 case Bytecodes::_invokespecial: 2967 case Bytecodes::_invokevirtual: 2968 case Bytecodes::_invokeinterface: 2969 // for final target we still produce an inline cache, in order 2970 // to be able to call mixed mode 2971 if (x->code() == Bytecodes::_invokespecial || optimized) { 2972 __ call_opt_virtual(target, receiver, result_register, 2973 SharedRuntime::get_resolve_opt_virtual_call_stub(), 2974 arg_list, info); 2975 } else if (x->vtable_index() < 0) { 2976 __ call_icvirtual(target, receiver, result_register, 2977 SharedRuntime::get_resolve_virtual_call_stub(), 2978 arg_list, info); 2979 } else { 2980 int entry_offset = InstanceKlass::vtable_start_offset() + x->vtable_index() * vtableEntry::size(); 2981 int vtable_offset = entry_offset * wordSize + vtableEntry::method_offset_in_bytes(); 2982 __ call_virtual(target, receiver, result_register, vtable_offset, arg_list, info); 2983 } 2984 break; 2985 case Bytecodes::_invokedynamic: { 2986 __ call_dynamic(target, receiver, result_register, 2987 SharedRuntime::get_resolve_static_call_stub(), 2988 arg_list, info); 2989 break; 2990 } 2991 default: 2992 fatal(err_msg("unexpected bytecode: %s", Bytecodes::name(x->code()))); 2993 break; 2994 } 2995 2996 // JSR 292 2997 // Restore the SP after MethodHandle call sites. 2998 if (is_method_handle_invoke) { 2999 __ move(FrameMap::method_handle_invoke_SP_save_opr(), FrameMap::stack_pointer()); 3000 } 3001 3002 if (x->type()->is_float() || x->type()->is_double()) { 3003 // Force rounding of results from non-strictfp when in strictfp 3004 // scope (or when we don't know the strictness of the callee, to 3005 // be safe.) 3006 if (method()->is_strict()) { 3007 if (!x->target_is_loaded() || !x->target_is_strictfp()) { 3008 result_register = round_item(result_register); 3009 } 3010 } 3011 } 3012 3013 if (result_register->is_valid()) { 3014 LIR_Opr result = rlock_result(x); 3015 __ move(result_register, result); 3016 } 3017 } 3018 3019 3020 void LIRGenerator::do_FPIntrinsics(Intrinsic* x) { 3021 assert(x->number_of_arguments() == 1, "wrong type"); 3022 LIRItem value (x->argument_at(0), this); 3023 LIR_Opr reg = rlock_result(x); 3024 value.load_item(); 3025 LIR_Opr tmp = force_to_spill(value.result(), as_BasicType(x->type())); 3026 __ move(tmp, reg); 3027 } 3028 3029 3030 3031 // Code for : x->x() {x->cond()} x->y() ? x->tval() : x->fval() 3032 void LIRGenerator::do_IfOp(IfOp* x) { 3033 #ifdef ASSERT 3034 { 3035 ValueTag xtag = x->x()->type()->tag(); 3036 ValueTag ttag = x->tval()->type()->tag(); 3037 assert(xtag == intTag || xtag == objectTag, "cannot handle others"); 3038 assert(ttag == addressTag || ttag == intTag || ttag == objectTag || ttag == longTag, "cannot handle others"); 3039 assert(ttag == x->fval()->type()->tag(), "cannot handle others"); 3040 } 3041 #endif 3042 3043 LIRItem left(x->x(), this); 3044 LIRItem right(x->y(), this); 3045 left.load_item(); 3046 if (can_inline_as_constant(right.value())) { 3047 right.dont_load_item(); 3048 } else { 3049 right.load_item(); 3050 } 3051 3052 LIRItem t_val(x->tval(), this); 3053 LIRItem f_val(x->fval(), this); 3054 t_val.dont_load_item(); 3055 f_val.dont_load_item(); 3056 LIR_Opr reg = rlock_result(x); 3057 3058 __ cmp(lir_cond(x->cond()), left.result(), right.result()); 3059 __ cmove(lir_cond(x->cond()), t_val.result(), f_val.result(), reg, as_BasicType(x->x()->type())); 3060 } 3061 3062 void LIRGenerator::do_RuntimeCall(address routine, int expected_arguments, Intrinsic* x) { 3063 assert(x->number_of_arguments() == expected_arguments, "wrong type"); 3064 LIR_Opr reg = result_register_for(x->type()); 3065 __ call_runtime_leaf(routine, getThreadTemp(), 3066 reg, new LIR_OprList()); 3067 LIR_Opr result = rlock_result(x); 3068 __ move(reg, result); 3069 } 3070 3071 #ifdef TRACE_HAVE_INTRINSICS 3072 void LIRGenerator::do_ThreadIDIntrinsic(Intrinsic* x) { 3073 LIR_Opr thread = getThreadPointer(); 3074 LIR_Opr osthread = new_pointer_register(); 3075 __ move(new LIR_Address(thread, in_bytes(JavaThread::osthread_offset()), osthread->type()), osthread); 3076 size_t thread_id_size = OSThread::thread_id_size(); 3077 if (thread_id_size == (size_t) BytesPerLong) { 3078 LIR_Opr id = new_register(T_LONG); 3079 __ move(new LIR_Address(osthread, in_bytes(OSThread::thread_id_offset()), T_LONG), id); 3080 __ convert(Bytecodes::_l2i, id, rlock_result(x)); 3081 } else if (thread_id_size == (size_t) BytesPerInt) { 3082 __ move(new LIR_Address(osthread, in_bytes(OSThread::thread_id_offset()), T_INT), rlock_result(x)); 3083 } else { 3084 ShouldNotReachHere(); 3085 } 3086 } 3087 3088 void LIRGenerator::do_ClassIDIntrinsic(Intrinsic* x) { 3089 CodeEmitInfo* info = state_for(x); 3090 CodeEmitInfo* info2 = new CodeEmitInfo(info); // Clone for the second null check 3091 BasicType klass_pointer_type = NOT_LP64(T_INT) LP64_ONLY(T_LONG); 3092 assert(info != NULL, "must have info"); 3093 LIRItem arg(x->argument_at(1), this); 3094 arg.load_item(); 3095 LIR_Opr klass = new_pointer_register(); 3096 __ move(new LIR_Address(arg.result(), java_lang_Class::klass_offset_in_bytes(), klass_pointer_type), klass, info); 3097 LIR_Opr id = new_register(T_LONG); 3098 ByteSize offset = TRACE_ID_OFFSET; 3099 LIR_Address* trace_id_addr = new LIR_Address(klass, in_bytes(offset), T_LONG); 3100 __ move(trace_id_addr, id); 3101 __ logical_or(id, LIR_OprFact::longConst(0x01l), id); 3102 __ store(id, trace_id_addr); 3103 __ logical_and(id, LIR_OprFact::longConst(~0x3l), id); 3104 __ move(id, rlock_result(x)); 3105 } 3106 #endif 3107 3108 void LIRGenerator::do_Intrinsic(Intrinsic* x) { 3109 switch (x->id()) { 3110 case vmIntrinsics::_intBitsToFloat : 3111 case vmIntrinsics::_doubleToRawLongBits : 3112 case vmIntrinsics::_longBitsToDouble : 3113 case vmIntrinsics::_floatToRawIntBits : { 3114 do_FPIntrinsics(x); 3115 break; 3116 } 3117 3118 #ifdef TRACE_HAVE_INTRINSICS 3119 case vmIntrinsics::_threadID: do_ThreadIDIntrinsic(x); break; 3120 case vmIntrinsics::_classID: do_ClassIDIntrinsic(x); break; 3121 case vmIntrinsics::_counterTime: 3122 do_RuntimeCall(CAST_FROM_FN_PTR(address, TRACE_TIME_METHOD), 0, x); 3123 break; 3124 #endif 3125 3126 case vmIntrinsics::_currentTimeMillis: 3127 do_RuntimeCall(CAST_FROM_FN_PTR(address, os::javaTimeMillis), 0, x); 3128 break; 3129 3130 case vmIntrinsics::_nanoTime: 3131 do_RuntimeCall(CAST_FROM_FN_PTR(address, os::javaTimeNanos), 0, x); 3132 break; 3133 3134 case vmIntrinsics::_Object_init: do_RegisterFinalizer(x); break; 3135 case vmIntrinsics::_isInstance: do_isInstance(x); break; 3136 case vmIntrinsics::_getClass: do_getClass(x); break; 3137 case vmIntrinsics::_currentThread: do_currentThread(x); break; 3138 3139 case vmIntrinsics::_dlog: // fall through 3140 case vmIntrinsics::_dlog10: // fall through 3141 case vmIntrinsics::_dabs: // fall through 3142 case vmIntrinsics::_dsqrt: // fall through 3143 case vmIntrinsics::_dtan: // fall through 3144 case vmIntrinsics::_dsin : // fall through 3145 case vmIntrinsics::_dcos : // fall through 3146 case vmIntrinsics::_dexp : // fall through 3147 case vmIntrinsics::_dpow : do_MathIntrinsic(x); break; 3148 case vmIntrinsics::_arraycopy: do_ArrayCopy(x); break; 3149 3150 // java.nio.Buffer.checkIndex 3151 case vmIntrinsics::_checkIndex: do_NIOCheckIndex(x); break; 3152 3153 case vmIntrinsics::_compareAndSwapObject: 3154 do_CompareAndSwap(x, objectType); 3155 break; 3156 case vmIntrinsics::_compareAndSwapInt: 3157 do_CompareAndSwap(x, intType); 3158 break; 3159 case vmIntrinsics::_compareAndSwapLong: 3160 do_CompareAndSwap(x, longType); 3161 break; 3162 3163 case vmIntrinsics::_loadFence : 3164 if (os::is_MP()) __ membar_acquire(); 3165 break; 3166 case vmIntrinsics::_storeFence: 3167 if (os::is_MP()) __ membar_release(); 3168 break; 3169 case vmIntrinsics::_fullFence : 3170 if (os::is_MP()) __ membar(); 3171 break; 3172 3173 case vmIntrinsics::_Reference_get: 3174 do_Reference_get(x); 3175 break; 3176 3177 case vmIntrinsics::_updateCRC32: 3178 case vmIntrinsics::_updateBytesCRC32: 3179 case vmIntrinsics::_updateByteBufferCRC32: 3180 do_update_CRC32(x); 3181 break; 3182 3183 default: ShouldNotReachHere(); break; 3184 } 3185 } 3186 3187 void LIRGenerator::profile_arguments(ProfileCall* x) { 3188 if (compilation()->profile_arguments()) { 3189 int bci = x->bci_of_invoke(); 3190 ciMethodData* md = x->method()->method_data_or_null(); 3191 ciProfileData* data = md->bci_to_data(bci); 3192 if ((data->is_CallTypeData() && data->as_CallTypeData()->has_arguments()) || 3193 (data->is_VirtualCallTypeData() && data->as_VirtualCallTypeData()->has_arguments())) { 3194 ByteSize extra = data->is_CallTypeData() ? CallTypeData::args_data_offset() : VirtualCallTypeData::args_data_offset(); 3195 int base_offset = md->byte_offset_of_slot(data, extra); 3196 LIR_Opr mdp = LIR_OprFact::illegalOpr; 3197 ciTypeStackSlotEntries* args = data->is_CallTypeData() ? ((ciCallTypeData*)data)->args() : ((ciVirtualCallTypeData*)data)->args(); 3198 3199 Bytecodes::Code bc = x->method()->java_code_at_bci(bci); 3200 int start = 0; 3201 int stop = data->is_CallTypeData() ? ((ciCallTypeData*)data)->number_of_arguments() : ((ciVirtualCallTypeData*)data)->number_of_arguments(); 3202 if (x->inlined() && x->callee()->is_static() && Bytecodes::has_receiver(bc)) { 3203 // first argument is not profiled at call (method handle invoke) 3204 assert(x->method()->raw_code_at_bci(bci) == Bytecodes::_invokehandle, "invokehandle expected"); 3205 start = 1; 3206 } 3207 ciSignature* callee_signature = x->callee()->signature(); 3208 // method handle call to virtual method 3209 bool has_receiver = x->inlined() && !x->callee()->is_static() && !Bytecodes::has_receiver(bc); 3210 ciSignatureStream callee_signature_stream(callee_signature, has_receiver ? x->callee()->holder() : NULL); 3211 3212 bool ignored_will_link; 3213 ciSignature* signature_at_call = NULL; 3214 x->method()->get_method_at_bci(bci, ignored_will_link, &signature_at_call); 3215 ciSignatureStream signature_at_call_stream(signature_at_call); 3216 3217 // if called through method handle invoke, some arguments may have been popped 3218 for (int i = 0; i < stop && i+start < x->nb_profiled_args(); i++) { 3219 int off = in_bytes(TypeEntriesAtCall::argument_type_offset(i)) - in_bytes(TypeEntriesAtCall::args_data_offset()); 3220 ciKlass* exact = profile_type(md, base_offset, off, 3221 args->type(i), x->profiled_arg_at(i+start), mdp, 3222 !x->arg_needs_null_check(i+start), 3223 signature_at_call_stream.next_klass(), callee_signature_stream.next_klass()); 3224 if (exact != NULL) { 3225 md->set_argument_type(bci, i, exact); 3226 } 3227 } 3228 } else { 3229 #ifdef ASSERT 3230 Bytecodes::Code code = x->method()->raw_code_at_bci(x->bci_of_invoke()); 3231 int n = x->nb_profiled_args(); 3232 assert(MethodData::profile_parameters() && (MethodData::profile_arguments_jsr292_only() || 3233 (x->inlined() && ((code == Bytecodes::_invokedynamic && n <= 1) || (code == Bytecodes::_invokehandle && n <= 2)))), 3234 "only at JSR292 bytecodes"); 3235 #endif 3236 } 3237 } 3238 } 3239 3240 // profile parameters on entry to an inlined method 3241 void LIRGenerator::profile_parameters_at_call(ProfileCall* x) { 3242 if (compilation()->profile_parameters() && x->inlined()) { 3243 ciMethodData* md = x->callee()->method_data_or_null(); 3244 if (md != NULL) { 3245 ciParametersTypeData* parameters_type_data = md->parameters_type_data(); 3246 if (parameters_type_data != NULL) { 3247 ciTypeStackSlotEntries* parameters = parameters_type_data->parameters(); 3248 LIR_Opr mdp = LIR_OprFact::illegalOpr; 3249 bool has_receiver = !x->callee()->is_static(); 3250 ciSignature* sig = x->callee()->signature(); 3251 ciSignatureStream sig_stream(sig, has_receiver ? x->callee()->holder() : NULL); 3252 int i = 0; // to iterate on the Instructions 3253 Value arg = x->recv(); 3254 bool not_null = false; 3255 int bci = x->bci_of_invoke(); 3256 Bytecodes::Code bc = x->method()->java_code_at_bci(bci); 3257 // The first parameter is the receiver so that's what we start 3258 // with if it exists. One exception is method handle call to 3259 // virtual method: the receiver is in the args list 3260 if (arg == NULL || !Bytecodes::has_receiver(bc)) { 3261 i = 1; 3262 arg = x->profiled_arg_at(0); 3263 not_null = !x->arg_needs_null_check(0); 3264 } 3265 int k = 0; // to iterate on the profile data 3266 for (;;) { 3267 intptr_t profiled_k = parameters->type(k); 3268 ciKlass* exact = profile_type(md, md->byte_offset_of_slot(parameters_type_data, ParametersTypeData::type_offset(0)), 3269 in_bytes(ParametersTypeData::type_offset(k)) - in_bytes(ParametersTypeData::type_offset(0)), 3270 profiled_k, arg, mdp, not_null, sig_stream.next_klass(), NULL); 3271 // If the profile is known statically set it once for all and do not emit any code 3272 if (exact != NULL) { 3273 md->set_parameter_type(k, exact); 3274 } 3275 k++; 3276 if (k >= parameters_type_data->number_of_parameters()) { 3277 #ifdef ASSERT 3278 int extra = 0; 3279 if (MethodData::profile_arguments() && TypeProfileParmsLimit != -1 && 3280 x->nb_profiled_args() >= TypeProfileParmsLimit && 3281 x->recv() != NULL && Bytecodes::has_receiver(bc)) { 3282 extra += 1; 3283 } 3284 assert(i == x->nb_profiled_args() - extra || (TypeProfileParmsLimit != -1 && TypeProfileArgsLimit > TypeProfileParmsLimit), "unused parameters?"); 3285 #endif 3286 break; 3287 } 3288 arg = x->profiled_arg_at(i); 3289 not_null = !x->arg_needs_null_check(i); 3290 i++; 3291 } 3292 } 3293 } 3294 } 3295 } 3296 3297 void LIRGenerator::do_ProfileCall(ProfileCall* x) { 3298 // Need recv in a temporary register so it interferes with the other temporaries 3299 LIR_Opr recv = LIR_OprFact::illegalOpr; 3300 LIR_Opr mdo = new_register(T_OBJECT); 3301 // tmp is used to hold the counters on SPARC 3302 LIR_Opr tmp = new_pointer_register(); 3303 3304 if (x->nb_profiled_args() > 0) { 3305 profile_arguments(x); 3306 } 3307 3308 // profile parameters on inlined method entry including receiver 3309 if (x->recv() != NULL || x->nb_profiled_args() > 0) { 3310 profile_parameters_at_call(x); 3311 } 3312 3313 if (x->recv() != NULL) { 3314 LIRItem value(x->recv(), this); 3315 value.load_item(); 3316 recv = new_register(T_OBJECT); 3317 __ move(value.result(), recv); 3318 } 3319 __ profile_call(x->method(), x->bci_of_invoke(), x->callee(), mdo, recv, tmp, x->known_holder()); 3320 } 3321 3322 void LIRGenerator::do_ProfileReturnType(ProfileReturnType* x) { 3323 int bci = x->bci_of_invoke(); 3324 ciMethodData* md = x->method()->method_data_or_null(); 3325 ciProfileData* data = md->bci_to_data(bci); 3326 assert(data->is_CallTypeData() || data->is_VirtualCallTypeData(), "wrong profile data type"); 3327 ciReturnTypeEntry* ret = data->is_CallTypeData() ? ((ciCallTypeData*)data)->ret() : ((ciVirtualCallTypeData*)data)->ret(); 3328 LIR_Opr mdp = LIR_OprFact::illegalOpr; 3329 3330 bool ignored_will_link; 3331 ciSignature* signature_at_call = NULL; 3332 x->method()->get_method_at_bci(bci, ignored_will_link, &signature_at_call); 3333 3334 // The offset within the MDO of the entry to update may be too large 3335 // to be used in load/store instructions on some platforms. So have 3336 // profile_type() compute the address of the profile in a register. 3337 ciKlass* exact = profile_type(md, md->byte_offset_of_slot(data, ret->type_offset()), 0, 3338 ret->type(), x->ret(), mdp, 3339 !x->needs_null_check(), 3340 signature_at_call->return_type()->as_klass(), 3341 x->callee()->signature()->return_type()->as_klass()); 3342 if (exact != NULL) { 3343 md->set_return_type(bci, exact); 3344 } 3345 } 3346 3347 void LIRGenerator::do_ProfileInvoke(ProfileInvoke* x) { 3348 // We can safely ignore accessors here, since c2 will inline them anyway, 3349 // accessors are also always mature. 3350 if (!x->inlinee()->is_accessor()) { 3351 CodeEmitInfo* info = state_for(x, x->state(), true); 3352 // Notify the runtime very infrequently only to take care of counter overflows 3353 int freq_log = Tier23InlineeNotifyFreqLog; 3354 double scale; 3355 if (_method->has_option_value("CompileThresholdScaling", scale)) { 3356 freq_log = Arguments::scaled_freq_log(freq_log, scale); 3357 } 3358 increment_event_counter_impl(info, x->inlinee(), right_n_bits(freq_log), InvocationEntryBci, false, true); 3359 } 3360 } 3361 3362 void LIRGenerator::increment_event_counter(CodeEmitInfo* info, int bci, bool backedge) { 3363 int freq_log; 3364 int level = compilation()->env()->comp_level(); 3365 if (level == CompLevel_limited_profile) { 3366 freq_log = (backedge ? Tier2BackedgeNotifyFreqLog : Tier2InvokeNotifyFreqLog); 3367 } else if (level == CompLevel_full_profile) { 3368 freq_log = (backedge ? Tier3BackedgeNotifyFreqLog : Tier3InvokeNotifyFreqLog); 3369 } else { 3370 ShouldNotReachHere(); 3371 } 3372 // Increment the appropriate invocation/backedge counter and notify the runtime. 3373 double scale; 3374 if (_method->has_option_value("CompileThresholdScaling", scale)) { 3375 freq_log = Arguments::scaled_freq_log(freq_log, scale); 3376 } 3377 increment_event_counter_impl(info, info->scope()->method(), right_n_bits(freq_log), bci, backedge, true); 3378 } 3379 3380 void LIRGenerator::decrement_age(CodeEmitInfo* info) { 3381 ciMethod* method = info->scope()->method(); 3382 MethodCounters* mc_adr = method->ensure_method_counters(); 3383 if (mc_adr != NULL) { 3384 LIR_Opr mc = new_pointer_register(); 3385 __ move(LIR_OprFact::intptrConst(mc_adr), mc); 3386 int offset = in_bytes(MethodCounters::nmethod_age_offset()); 3387 LIR_Address* counter = new LIR_Address(mc, offset, T_INT); 3388 LIR_Opr result = new_register(T_INT); 3389 __ load(counter, result); 3390 __ sub(result, LIR_OprFact::intConst(1), result); 3391 __ store(result, counter); 3392 // DeoptimizeStub will reexecute from the current state in code info. 3393 CodeStub* deopt = new DeoptimizeStub(info, Deoptimization::Reason_tenured, 3394 Deoptimization::Action_make_not_entrant); 3395 __ cmp(lir_cond_lessEqual, result, LIR_OprFact::intConst(0)); 3396 __ branch(lir_cond_lessEqual, T_INT, deopt); 3397 } 3398 } 3399 3400 3401 void LIRGenerator::increment_event_counter_impl(CodeEmitInfo* info, 3402 ciMethod *method, int frequency, 3403 int bci, bool backedge, bool notify) { 3404 assert(frequency == 0 || is_power_of_2(frequency + 1), "Frequency must be x^2 - 1 or 0"); 3405 int level = _compilation->env()->comp_level(); 3406 assert(level > CompLevel_simple, "Shouldn't be here"); 3407 3408 int offset = -1; 3409 LIR_Opr counter_holder; 3410 if (level == CompLevel_limited_profile) { 3411 MethodCounters* counters_adr = method->ensure_method_counters(); 3412 if (counters_adr == NULL) { 3413 bailout("method counters allocation failed"); 3414 return; 3415 } 3416 counter_holder = new_pointer_register(); 3417 __ move(LIR_OprFact::intptrConst(counters_adr), counter_holder); 3418 offset = in_bytes(backedge ? MethodCounters::backedge_counter_offset() : 3419 MethodCounters::invocation_counter_offset()); 3420 } else if (level == CompLevel_full_profile) { 3421 counter_holder = new_register(T_METADATA); 3422 offset = in_bytes(backedge ? MethodData::backedge_counter_offset() : 3423 MethodData::invocation_counter_offset()); 3424 ciMethodData* md = method->method_data_or_null(); 3425 assert(md != NULL, "Sanity"); 3426 __ metadata2reg(md->constant_encoding(), counter_holder); 3427 } else { 3428 ShouldNotReachHere(); 3429 } 3430 LIR_Address* counter = new LIR_Address(counter_holder, offset, T_INT); 3431 LIR_Opr result = new_register(T_INT); 3432 __ load(counter, result); 3433 __ add(result, LIR_OprFact::intConst(InvocationCounter::count_increment), result); 3434 __ store(result, counter); 3435 if (notify) { 3436 LIR_Opr mask = load_immediate(frequency << InvocationCounter::count_shift, T_INT); 3437 LIR_Opr meth = new_register(T_METADATA); 3438 __ metadata2reg(method->constant_encoding(), meth); 3439 __ logical_and(result, mask, result); 3440 __ cmp(lir_cond_equal, result, LIR_OprFact::intConst(0)); 3441 // The bci for info can point to cmp for if's we want the if bci 3442 CodeStub* overflow = new CounterOverflowStub(info, bci, meth); 3443 __ branch(lir_cond_equal, T_INT, overflow); 3444 __ branch_destination(overflow->continuation()); 3445 } 3446 } 3447 3448 void LIRGenerator::do_RuntimeCall(RuntimeCall* x) { 3449 LIR_OprList* args = new LIR_OprList(x->number_of_arguments()); 3450 BasicTypeList* signature = new BasicTypeList(x->number_of_arguments()); 3451 3452 if (x->pass_thread()) { 3453 signature->append(LP64_ONLY(T_LONG) NOT_LP64(T_INT)); // thread 3454 args->append(getThreadPointer()); 3455 } 3456 3457 for (int i = 0; i < x->number_of_arguments(); i++) { 3458 Value a = x->argument_at(i); 3459 LIRItem* item = new LIRItem(a, this); 3460 item->load_item(); 3461 args->append(item->result()); 3462 signature->append(as_BasicType(a->type())); 3463 } 3464 3465 LIR_Opr result = call_runtime(signature, args, x->entry(), x->type(), NULL); 3466 if (x->type() == voidType) { 3467 set_no_result(x); 3468 } else { 3469 __ move(result, rlock_result(x)); 3470 } 3471 } 3472 3473 #ifdef ASSERT 3474 void LIRGenerator::do_Assert(Assert *x) { 3475 ValueTag tag = x->x()->type()->tag(); 3476 If::Condition cond = x->cond(); 3477 3478 LIRItem xitem(x->x(), this); 3479 LIRItem yitem(x->y(), this); 3480 LIRItem* xin = &xitem; 3481 LIRItem* yin = &yitem; 3482 3483 assert(tag == intTag, "Only integer assertions are valid!"); 3484 3485 xin->load_item(); 3486 yin->dont_load_item(); 3487 3488 set_no_result(x); 3489 3490 LIR_Opr left = xin->result(); 3491 LIR_Opr right = yin->result(); 3492 3493 __ lir_assert(lir_cond(x->cond()), left, right, x->message(), true); 3494 } 3495 #endif 3496 3497 void LIRGenerator::do_RangeCheckPredicate(RangeCheckPredicate *x) { 3498 3499 3500 Instruction *a = x->x(); 3501 Instruction *b = x->y(); 3502 if (!a || StressRangeCheckElimination) { 3503 assert(!b || StressRangeCheckElimination, "B must also be null"); 3504 3505 CodeEmitInfo *info = state_for(x, x->state()); 3506 CodeStub* stub = new PredicateFailedStub(info); 3507 3508 __ jump(stub); 3509 } else if (a->type()->as_IntConstant() && b->type()->as_IntConstant()) { 3510 int a_int = a->type()->as_IntConstant()->value(); 3511 int b_int = b->type()->as_IntConstant()->value(); 3512 3513 bool ok = false; 3514 3515 switch(x->cond()) { 3516 case Instruction::eql: ok = (a_int == b_int); break; 3517 case Instruction::neq: ok = (a_int != b_int); break; 3518 case Instruction::lss: ok = (a_int < b_int); break; 3519 case Instruction::leq: ok = (a_int <= b_int); break; 3520 case Instruction::gtr: ok = (a_int > b_int); break; 3521 case Instruction::geq: ok = (a_int >= b_int); break; 3522 case Instruction::aeq: ok = ((unsigned int)a_int >= (unsigned int)b_int); break; 3523 case Instruction::beq: ok = ((unsigned int)a_int <= (unsigned int)b_int); break; 3524 default: ShouldNotReachHere(); 3525 } 3526 3527 if (ok) { 3528 3529 CodeEmitInfo *info = state_for(x, x->state()); 3530 CodeStub* stub = new PredicateFailedStub(info); 3531 3532 __ jump(stub); 3533 } 3534 } else { 3535 3536 ValueTag tag = x->x()->type()->tag(); 3537 If::Condition cond = x->cond(); 3538 LIRItem xitem(x->x(), this); 3539 LIRItem yitem(x->y(), this); 3540 LIRItem* xin = &xitem; 3541 LIRItem* yin = &yitem; 3542 3543 assert(tag == intTag, "Only integer deoptimizations are valid!"); 3544 3545 xin->load_item(); 3546 yin->dont_load_item(); 3547 set_no_result(x); 3548 3549 LIR_Opr left = xin->result(); 3550 LIR_Opr right = yin->result(); 3551 3552 CodeEmitInfo *info = state_for(x, x->state()); 3553 CodeStub* stub = new PredicateFailedStub(info); 3554 3555 __ cmp(lir_cond(cond), left, right); 3556 __ branch(lir_cond(cond), right->type(), stub); 3557 } 3558 } 3559 3560 3561 LIR_Opr LIRGenerator::call_runtime(Value arg1, address entry, ValueType* result_type, CodeEmitInfo* info) { 3562 LIRItemList args(1); 3563 LIRItem value(arg1, this); 3564 args.append(&value); 3565 BasicTypeList signature; 3566 signature.append(as_BasicType(arg1->type())); 3567 3568 return call_runtime(&signature, &args, entry, result_type, info); 3569 } 3570 3571 3572 LIR_Opr LIRGenerator::call_runtime(Value arg1, Value arg2, address entry, ValueType* result_type, CodeEmitInfo* info) { 3573 LIRItemList args(2); 3574 LIRItem value1(arg1, this); 3575 LIRItem value2(arg2, this); 3576 args.append(&value1); 3577 args.append(&value2); 3578 BasicTypeList signature; 3579 signature.append(as_BasicType(arg1->type())); 3580 signature.append(as_BasicType(arg2->type())); 3581 3582 return call_runtime(&signature, &args, entry, result_type, info); 3583 } 3584 3585 3586 LIR_Opr LIRGenerator::call_runtime(BasicTypeArray* signature, LIR_OprList* args, 3587 address entry, ValueType* result_type, CodeEmitInfo* info) { 3588 // get a result register 3589 LIR_Opr phys_reg = LIR_OprFact::illegalOpr; 3590 LIR_Opr result = LIR_OprFact::illegalOpr; 3591 if (result_type->tag() != voidTag) { 3592 result = new_register(result_type); 3593 phys_reg = result_register_for(result_type); 3594 } 3595 3596 // move the arguments into the correct location 3597 CallingConvention* cc = frame_map()->c_calling_convention(signature); 3598 assert(cc->length() == args->length(), "argument mismatch"); 3599 for (int i = 0; i < args->length(); i++) { 3600 LIR_Opr arg = args->at(i); 3601 LIR_Opr loc = cc->at(i); 3602 if (loc->is_register()) { 3603 __ move(arg, loc); 3604 } else { 3605 LIR_Address* addr = loc->as_address_ptr(); 3606 // if (!can_store_as_constant(arg)) { 3607 // LIR_Opr tmp = new_register(arg->type()); 3608 // __ move(arg, tmp); 3609 // arg = tmp; 3610 // } 3611 if (addr->type() == T_LONG || addr->type() == T_DOUBLE) { 3612 __ unaligned_move(arg, addr); 3613 } else { 3614 __ move(arg, addr); 3615 } 3616 } 3617 } 3618 3619 if (info) { 3620 __ call_runtime(entry, getThreadTemp(), phys_reg, cc->args(), info); 3621 } else { 3622 __ call_runtime_leaf(entry, getThreadTemp(), phys_reg, cc->args()); 3623 } 3624 if (result->is_valid()) { 3625 __ move(phys_reg, result); 3626 } 3627 return result; 3628 } 3629 3630 3631 LIR_Opr LIRGenerator::call_runtime(BasicTypeArray* signature, LIRItemList* args, 3632 address entry, ValueType* result_type, CodeEmitInfo* info) { 3633 // get a result register 3634 LIR_Opr phys_reg = LIR_OprFact::illegalOpr; 3635 LIR_Opr result = LIR_OprFact::illegalOpr; 3636 if (result_type->tag() != voidTag) { 3637 result = new_register(result_type); 3638 phys_reg = result_register_for(result_type); 3639 } 3640 3641 // move the arguments into the correct location 3642 CallingConvention* cc = frame_map()->c_calling_convention(signature); 3643 3644 assert(cc->length() == args->length(), "argument mismatch"); 3645 for (int i = 0; i < args->length(); i++) { 3646 LIRItem* arg = args->at(i); 3647 LIR_Opr loc = cc->at(i); 3648 if (loc->is_register()) { 3649 arg->load_item_force(loc); 3650 } else { 3651 LIR_Address* addr = loc->as_address_ptr(); 3652 arg->load_for_store(addr->type()); 3653 if (addr->type() == T_LONG || addr->type() == T_DOUBLE) { 3654 __ unaligned_move(arg->result(), addr); 3655 } else { 3656 __ move(arg->result(), addr); 3657 } 3658 } 3659 } 3660 3661 if (info) { 3662 __ call_runtime(entry, getThreadTemp(), phys_reg, cc->args(), info); 3663 } else { 3664 __ call_runtime_leaf(entry, getThreadTemp(), phys_reg, cc->args()); 3665 } 3666 if (result->is_valid()) { 3667 __ move(phys_reg, result); 3668 } 3669 return result; 3670 } 3671 3672 void LIRGenerator::do_MemBar(MemBar* x) { 3673 if (os::is_MP()) { 3674 LIR_Code code = x->code(); 3675 switch(code) { 3676 case lir_membar_acquire : __ membar_acquire(); break; 3677 case lir_membar_release : __ membar_release(); break; 3678 case lir_membar : __ membar(); break; 3679 case lir_membar_loadload : __ membar_loadload(); break; 3680 case lir_membar_storestore: __ membar_storestore(); break; 3681 case lir_membar_loadstore : __ membar_loadstore(); break; 3682 case lir_membar_storeload : __ membar_storeload(); break; 3683 default : ShouldNotReachHere(); break; 3684 } 3685 } 3686 }