1 /* 2 * Copyright (c) 2005, 2018, 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_Defs.hpp" 28 #include "c1/c1_FrameMap.hpp" 29 #include "c1/c1_Instruction.hpp" 30 #include "c1/c1_LIRAssembler.hpp" 31 #include "c1/c1_LIRGenerator.hpp" 32 #include "c1/c1_ValueStack.hpp" 33 #include "ci/ciArrayKlass.hpp" 34 #include "ci/ciInstance.hpp" 35 #include "ci/ciObjArray.hpp" 36 #include "ci/ciUtilities.hpp" 37 #include "gc/shared/barrierSet.hpp" 38 #include "gc/shared/c1/barrierSetC1.hpp" 39 #include "runtime/arguments.hpp" 40 #include "runtime/sharedRuntime.hpp" 41 #include "runtime/stubRoutines.hpp" 42 #include "runtime/vm_version.hpp" 43 #include "utilities/bitMap.inline.hpp" 44 #include "utilities/macros.hpp" 45 46 #ifdef ASSERT 47 #define __ gen()->lir(__FILE__, __LINE__)-> 48 #else 49 #define __ gen()->lir()-> 50 #endif 51 52 #ifndef PATCHED_ADDR 53 #define PATCHED_ADDR (max_jint) 54 #endif 55 56 void PhiResolverState::reset(int max_vregs) { 57 // Initialize array sizes 58 _virtual_operands.at_put_grow(max_vregs - 1, NULL, NULL); 59 _virtual_operands.trunc_to(0); 60 _other_operands.at_put_grow(max_vregs - 1, NULL, NULL); 61 _other_operands.trunc_to(0); 62 _vreg_table.at_put_grow(max_vregs - 1, NULL, NULL); 63 _vreg_table.trunc_to(0); 64 } 65 66 67 68 //-------------------------------------------------------------- 69 // PhiResolver 70 71 // Resolves cycles: 72 // 73 // r1 := r2 becomes temp := r1 74 // r2 := r1 r1 := r2 75 // r2 := temp 76 // and orders moves: 77 // 78 // r2 := r3 becomes r1 := r2 79 // r1 := r2 r2 := r3 80 81 PhiResolver::PhiResolver(LIRGenerator* gen, int max_vregs) 82 : _gen(gen) 83 , _state(gen->resolver_state()) 84 , _temp(LIR_OprFact::illegalOpr) 85 { 86 // reinitialize the shared state arrays 87 _state.reset(max_vregs); 88 } 89 90 91 void PhiResolver::emit_move(LIR_Opr src, LIR_Opr dest) { 92 assert(src->is_valid(), ""); 93 assert(dest->is_valid(), ""); 94 __ move(src, dest); 95 } 96 97 98 void PhiResolver::move_temp_to(LIR_Opr dest) { 99 assert(_temp->is_valid(), ""); 100 emit_move(_temp, dest); 101 NOT_PRODUCT(_temp = LIR_OprFact::illegalOpr); 102 } 103 104 105 void PhiResolver::move_to_temp(LIR_Opr src) { 106 assert(_temp->is_illegal(), ""); 107 _temp = _gen->new_register(src->type()); 108 emit_move(src, _temp); 109 } 110 111 112 // Traverse assignment graph in depth first order and generate moves in post order 113 // ie. two assignments: b := c, a := b start with node c: 114 // Call graph: move(NULL, c) -> move(c, b) -> move(b, a) 115 // Generates moves in this order: move b to a and move c to b 116 // ie. cycle a := b, b := a start with node a 117 // Call graph: move(NULL, a) -> move(a, b) -> move(b, a) 118 // Generates moves in this order: move b to temp, move a to b, move temp to a 119 void PhiResolver::move(ResolveNode* src, ResolveNode* dest) { 120 if (!dest->visited()) { 121 dest->set_visited(); 122 for (int i = dest->no_of_destinations()-1; i >= 0; i --) { 123 move(dest, dest->destination_at(i)); 124 } 125 } else if (!dest->start_node()) { 126 // cylce in graph detected 127 assert(_loop == NULL, "only one loop valid!"); 128 _loop = dest; 129 move_to_temp(src->operand()); 130 return; 131 } // else dest is a start node 132 133 if (!dest->assigned()) { 134 if (_loop == dest) { 135 move_temp_to(dest->operand()); 136 dest->set_assigned(); 137 } else if (src != NULL) { 138 emit_move(src->operand(), dest->operand()); 139 dest->set_assigned(); 140 } 141 } 142 } 143 144 145 PhiResolver::~PhiResolver() { 146 int i; 147 // resolve any cycles in moves from and to virtual registers 148 for (i = virtual_operands().length() - 1; i >= 0; i --) { 149 ResolveNode* node = virtual_operands().at(i); 150 if (!node->visited()) { 151 _loop = NULL; 152 move(NULL, node); 153 node->set_start_node(); 154 assert(_temp->is_illegal(), "move_temp_to() call missing"); 155 } 156 } 157 158 // generate move for move from non virtual register to abitrary destination 159 for (i = other_operands().length() - 1; i >= 0; i --) { 160 ResolveNode* node = other_operands().at(i); 161 for (int j = node->no_of_destinations() - 1; j >= 0; j --) { 162 emit_move(node->operand(), node->destination_at(j)->operand()); 163 } 164 } 165 } 166 167 168 ResolveNode* PhiResolver::create_node(LIR_Opr opr, bool source) { 169 ResolveNode* node; 170 if (opr->is_virtual()) { 171 int vreg_num = opr->vreg_number(); 172 node = vreg_table().at_grow(vreg_num, NULL); 173 assert(node == NULL || node->operand() == opr, ""); 174 if (node == NULL) { 175 node = new ResolveNode(opr); 176 vreg_table().at_put(vreg_num, node); 177 } 178 // Make sure that all virtual operands show up in the list when 179 // they are used as the source of a move. 180 if (source && !virtual_operands().contains(node)) { 181 virtual_operands().append(node); 182 } 183 } else { 184 assert(source, ""); 185 node = new ResolveNode(opr); 186 other_operands().append(node); 187 } 188 return node; 189 } 190 191 192 void PhiResolver::move(LIR_Opr src, LIR_Opr dest) { 193 assert(dest->is_virtual(), ""); 194 // tty->print("move "); src->print(); tty->print(" to "); dest->print(); tty->cr(); 195 assert(src->is_valid(), ""); 196 assert(dest->is_valid(), ""); 197 ResolveNode* source = source_node(src); 198 source->append(destination_node(dest)); 199 } 200 201 202 //-------------------------------------------------------------- 203 // LIRItem 204 205 void LIRItem::set_result(LIR_Opr opr) { 206 assert(value()->operand()->is_illegal() || value()->operand()->is_constant(), "operand should never change"); 207 value()->set_operand(opr); 208 209 if (opr->is_virtual()) { 210 _gen->_instruction_for_operand.at_put_grow(opr->vreg_number(), value(), NULL); 211 } 212 213 _result = opr; 214 } 215 216 void LIRItem::load_item() { 217 if (result()->is_illegal()) { 218 // update the items result 219 _result = value()->operand(); 220 } 221 if (!result()->is_register()) { 222 LIR_Opr reg = _gen->new_register(value()->type()); 223 __ move(result(), reg); 224 if (result()->is_constant()) { 225 _result = reg; 226 } else { 227 set_result(reg); 228 } 229 } 230 } 231 232 233 void LIRItem::load_for_store(BasicType type) { 234 if (_gen->can_store_as_constant(value(), type)) { 235 _result = value()->operand(); 236 if (!_result->is_constant()) { 237 _result = LIR_OprFact::value_type(value()->type()); 238 } 239 } else if (type == T_BYTE || type == T_BOOLEAN) { 240 load_byte_item(); 241 } else { 242 load_item(); 243 } 244 } 245 246 void LIRItem::load_item_force(LIR_Opr reg) { 247 LIR_Opr r = result(); 248 if (r != reg) { 249 #if !defined(ARM) && !defined(E500V2) 250 if (r->type() != reg->type()) { 251 // moves between different types need an intervening spill slot 252 r = _gen->force_to_spill(r, reg->type()); 253 } 254 #endif 255 __ move(r, reg); 256 _result = reg; 257 } 258 } 259 260 ciObject* LIRItem::get_jobject_constant() const { 261 ObjectType* oc = type()->as_ObjectType(); 262 if (oc) { 263 return oc->constant_value(); 264 } 265 return NULL; 266 } 267 268 269 jint LIRItem::get_jint_constant() const { 270 assert(is_constant() && value() != NULL, ""); 271 assert(type()->as_IntConstant() != NULL, "type check"); 272 return type()->as_IntConstant()->value(); 273 } 274 275 276 jint LIRItem::get_address_constant() const { 277 assert(is_constant() && value() != NULL, ""); 278 assert(type()->as_AddressConstant() != NULL, "type check"); 279 return type()->as_AddressConstant()->value(); 280 } 281 282 283 jfloat LIRItem::get_jfloat_constant() const { 284 assert(is_constant() && value() != NULL, ""); 285 assert(type()->as_FloatConstant() != NULL, "type check"); 286 return type()->as_FloatConstant()->value(); 287 } 288 289 290 jdouble LIRItem::get_jdouble_constant() const { 291 assert(is_constant() && value() != NULL, ""); 292 assert(type()->as_DoubleConstant() != NULL, "type check"); 293 return type()->as_DoubleConstant()->value(); 294 } 295 296 297 jlong LIRItem::get_jlong_constant() const { 298 assert(is_constant() && value() != NULL, ""); 299 assert(type()->as_LongConstant() != NULL, "type check"); 300 return type()->as_LongConstant()->value(); 301 } 302 303 304 305 //-------------------------------------------------------------- 306 307 308 void LIRGenerator::block_do_prolog(BlockBegin* block) { 309 #ifndef PRODUCT 310 if (PrintIRWithLIR) { 311 block->print(); 312 } 313 #endif 314 315 // set up the list of LIR instructions 316 assert(block->lir() == NULL, "LIR list already computed for this block"); 317 _lir = new LIR_List(compilation(), block); 318 block->set_lir(_lir); 319 320 __ branch_destination(block->label()); 321 322 if (LIRTraceExecution && 323 Compilation::current()->hir()->start()->block_id() != block->block_id() && 324 !block->is_set(BlockBegin::exception_entry_flag)) { 325 assert(block->lir()->instructions_list()->length() == 1, "should come right after br_dst"); 326 trace_block_entry(block); 327 } 328 } 329 330 331 void LIRGenerator::block_do_epilog(BlockBegin* block) { 332 #ifndef PRODUCT 333 if (PrintIRWithLIR) { 334 tty->cr(); 335 } 336 #endif 337 338 // LIR_Opr for unpinned constants shouldn't be referenced by other 339 // blocks so clear them out after processing the block. 340 for (int i = 0; i < _unpinned_constants.length(); i++) { 341 _unpinned_constants.at(i)->clear_operand(); 342 } 343 _unpinned_constants.trunc_to(0); 344 345 // clear our any registers for other local constants 346 _constants.trunc_to(0); 347 _reg_for_constants.trunc_to(0); 348 } 349 350 351 void LIRGenerator::block_do(BlockBegin* block) { 352 CHECK_BAILOUT(); 353 354 block_do_prolog(block); 355 set_block(block); 356 357 for (Instruction* instr = block; instr != NULL; instr = instr->next()) { 358 if (instr->is_pinned()) do_root(instr); 359 } 360 361 set_block(NULL); 362 block_do_epilog(block); 363 } 364 365 366 //-------------------------LIRGenerator----------------------------- 367 368 // This is where the tree-walk starts; instr must be root; 369 void LIRGenerator::do_root(Value instr) { 370 CHECK_BAILOUT(); 371 372 InstructionMark im(compilation(), instr); 373 374 assert(instr->is_pinned(), "use only with roots"); 375 assert(instr->subst() == instr, "shouldn't have missed substitution"); 376 377 instr->visit(this); 378 379 assert(!instr->has_uses() || instr->operand()->is_valid() || 380 instr->as_Constant() != NULL || bailed_out(), "invalid item set"); 381 } 382 383 384 // This is called for each node in tree; the walk stops if a root is reached 385 void LIRGenerator::walk(Value instr) { 386 InstructionMark im(compilation(), instr); 387 //stop walk when encounter a root 388 if ((instr->is_pinned() && instr->as_Phi() == NULL) || instr->operand()->is_valid()) { 389 assert(instr->operand() != LIR_OprFact::illegalOpr || instr->as_Constant() != NULL, "this root has not yet been visited"); 390 } else { 391 assert(instr->subst() == instr, "shouldn't have missed substitution"); 392 instr->visit(this); 393 // assert(instr->use_count() > 0 || instr->as_Phi() != NULL, "leaf instruction must have a use"); 394 } 395 } 396 397 398 CodeEmitInfo* LIRGenerator::state_for(Instruction* x, ValueStack* state, bool ignore_xhandler) { 399 assert(state != NULL, "state must be defined"); 400 401 #ifndef PRODUCT 402 state->verify(); 403 #endif 404 405 ValueStack* s = state; 406 for_each_state(s) { 407 if (s->kind() == ValueStack::EmptyExceptionState) { 408 assert(s->stack_size() == 0 && s->locals_size() == 0 && (s->locks_size() == 0 || s->locks_size() == 1), "state must be empty"); 409 continue; 410 } 411 412 int index; 413 Value value; 414 for_each_stack_value(s, index, value) { 415 assert(value->subst() == value, "missed substitution"); 416 if (!value->is_pinned() && value->as_Constant() == NULL && value->as_Local() == NULL) { 417 walk(value); 418 assert(value->operand()->is_valid(), "must be evaluated now"); 419 } 420 } 421 422 int bci = s->bci(); 423 IRScope* scope = s->scope(); 424 ciMethod* method = scope->method(); 425 426 MethodLivenessResult liveness = method->liveness_at_bci(bci); 427 if (bci == SynchronizationEntryBCI) { 428 if (x->as_ExceptionObject() || x->as_Throw()) { 429 // all locals are dead on exit from the synthetic unlocker 430 liveness.clear(); 431 } else { 432 assert(x->as_MonitorEnter() || x->as_ProfileInvoke(), "only other cases are MonitorEnter and ProfileInvoke"); 433 } 434 } 435 if (!liveness.is_valid()) { 436 // Degenerate or breakpointed method. 437 bailout("Degenerate or breakpointed method"); 438 } else { 439 assert((int)liveness.size() == s->locals_size(), "error in use of liveness"); 440 for_each_local_value(s, index, value) { 441 assert(value->subst() == value, "missed substition"); 442 if (liveness.at(index) && !value->type()->is_illegal()) { 443 if (!value->is_pinned() && value->as_Constant() == NULL && value->as_Local() == NULL) { 444 walk(value); 445 assert(value->operand()->is_valid(), "must be evaluated now"); 446 } 447 } else { 448 // NULL out this local so that linear scan can assume that all non-NULL values are live. 449 s->invalidate_local(index); 450 } 451 } 452 } 453 } 454 455 return new CodeEmitInfo(state, ignore_xhandler ? NULL : x->exception_handlers(), x->check_flag(Instruction::DeoptimizeOnException)); 456 } 457 458 459 CodeEmitInfo* LIRGenerator::state_for(Instruction* x) { 460 return state_for(x, x->exception_state()); 461 } 462 463 464 void LIRGenerator::klass2reg_with_patching(LIR_Opr r, ciMetadata* obj, CodeEmitInfo* info, bool need_resolve) { 465 /* C2 relies on constant pool entries being resolved (ciTypeFlow), so if TieredCompilation 466 * is active and the class hasn't yet been resolved we need to emit a patch that resolves 467 * the class. */ 468 if ((TieredCompilation && need_resolve) || !obj->is_loaded() || PatchALot) { 469 assert(info != NULL, "info must be set if class is not loaded"); 470 __ klass2reg_patch(NULL, r, info); 471 } else { 472 // no patching needed 473 __ metadata2reg(obj->constant_encoding(), r); 474 } 475 } 476 477 478 void LIRGenerator::array_range_check(LIR_Opr array, LIR_Opr index, 479 CodeEmitInfo* null_check_info, CodeEmitInfo* range_check_info) { 480 CodeStub* stub = new RangeCheckStub(range_check_info, index, array); 481 if (index->is_constant()) { 482 cmp_mem_int(lir_cond_belowEqual, array, arrayOopDesc::length_offset_in_bytes(), 483 index->as_jint(), null_check_info); 484 __ branch(lir_cond_belowEqual, T_INT, stub); // forward branch 485 } else { 486 cmp_reg_mem(lir_cond_aboveEqual, index, array, 487 arrayOopDesc::length_offset_in_bytes(), T_INT, null_check_info); 488 __ branch(lir_cond_aboveEqual, T_INT, stub); // forward branch 489 } 490 } 491 492 493 void LIRGenerator::nio_range_check(LIR_Opr buffer, LIR_Opr index, LIR_Opr result, CodeEmitInfo* info) { 494 CodeStub* stub = new RangeCheckStub(info, index); 495 if (index->is_constant()) { 496 cmp_mem_int(lir_cond_belowEqual, buffer, java_nio_Buffer::limit_offset(), index->as_jint(), info); 497 __ branch(lir_cond_belowEqual, T_INT, stub); // forward branch 498 } else { 499 cmp_reg_mem(lir_cond_aboveEqual, index, buffer, 500 java_nio_Buffer::limit_offset(), T_INT, info); 501 __ branch(lir_cond_aboveEqual, T_INT, stub); // forward branch 502 } 503 __ move(index, result); 504 } 505 506 507 508 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) { 509 LIR_Opr result_op = result; 510 LIR_Opr left_op = left; 511 LIR_Opr right_op = right; 512 513 if (TwoOperandLIRForm && left_op != result_op) { 514 assert(right_op != result_op, "malformed"); 515 __ move(left_op, result_op); 516 left_op = result_op; 517 } 518 519 switch(code) { 520 case Bytecodes::_dadd: 521 case Bytecodes::_fadd: 522 case Bytecodes::_ladd: 523 case Bytecodes::_iadd: __ add(left_op, right_op, result_op); break; 524 case Bytecodes::_fmul: 525 case Bytecodes::_lmul: __ mul(left_op, right_op, result_op); break; 526 527 case Bytecodes::_dmul: 528 { 529 if (is_strictfp) { 530 __ mul_strictfp(left_op, right_op, result_op, tmp_op); break; 531 } else { 532 __ mul(left_op, right_op, result_op); break; 533 } 534 } 535 break; 536 537 case Bytecodes::_imul: 538 { 539 bool did_strength_reduce = false; 540 541 if (right->is_constant()) { 542 jint c = right->as_jint(); 543 if (c > 0 && is_power_of_2(c)) { 544 // do not need tmp here 545 __ shift_left(left_op, exact_log2(c), result_op); 546 did_strength_reduce = true; 547 } else { 548 did_strength_reduce = strength_reduce_multiply(left_op, c, result_op, tmp_op); 549 } 550 } 551 // we couldn't strength reduce so just emit the multiply 552 if (!did_strength_reduce) { 553 __ mul(left_op, right_op, result_op); 554 } 555 } 556 break; 557 558 case Bytecodes::_dsub: 559 case Bytecodes::_fsub: 560 case Bytecodes::_lsub: 561 case Bytecodes::_isub: __ sub(left_op, right_op, result_op); break; 562 563 case Bytecodes::_fdiv: __ div (left_op, right_op, result_op); break; 564 // ldiv and lrem are implemented with a direct runtime call 565 566 case Bytecodes::_ddiv: 567 { 568 if (is_strictfp) { 569 __ div_strictfp (left_op, right_op, result_op, tmp_op); break; 570 } else { 571 __ div (left_op, right_op, result_op); break; 572 } 573 } 574 break; 575 576 case Bytecodes::_drem: 577 case Bytecodes::_frem: __ rem (left_op, right_op, result_op); break; 578 579 default: ShouldNotReachHere(); 580 } 581 } 582 583 584 void LIRGenerator::arithmetic_op_int(Bytecodes::Code code, LIR_Opr result, LIR_Opr left, LIR_Opr right, LIR_Opr tmp) { 585 arithmetic_op(code, result, left, right, false, tmp); 586 } 587 588 589 void LIRGenerator::arithmetic_op_long(Bytecodes::Code code, LIR_Opr result, LIR_Opr left, LIR_Opr right, CodeEmitInfo* info) { 590 arithmetic_op(code, result, left, right, false, LIR_OprFact::illegalOpr, info); 591 } 592 593 594 void LIRGenerator::arithmetic_op_fpu(Bytecodes::Code code, LIR_Opr result, LIR_Opr left, LIR_Opr right, bool is_strictfp, LIR_Opr tmp) { 595 arithmetic_op(code, result, left, right, is_strictfp, tmp); 596 } 597 598 599 void LIRGenerator::shift_op(Bytecodes::Code code, LIR_Opr result_op, LIR_Opr value, LIR_Opr count, LIR_Opr tmp) { 600 601 if (TwoOperandLIRForm && value != result_op 602 // Only 32bit right shifts require two operand form on S390. 603 S390_ONLY(&& (code == Bytecodes::_ishr || code == Bytecodes::_iushr))) { 604 assert(count != result_op, "malformed"); 605 __ move(value, result_op); 606 value = result_op; 607 } 608 609 assert(count->is_constant() || count->is_register(), "must be"); 610 switch(code) { 611 case Bytecodes::_ishl: 612 case Bytecodes::_lshl: __ shift_left(value, count, result_op, tmp); break; 613 case Bytecodes::_ishr: 614 case Bytecodes::_lshr: __ shift_right(value, count, result_op, tmp); break; 615 case Bytecodes::_iushr: 616 case Bytecodes::_lushr: __ unsigned_shift_right(value, count, result_op, tmp); break; 617 default: ShouldNotReachHere(); 618 } 619 } 620 621 622 void LIRGenerator::logic_op (Bytecodes::Code code, LIR_Opr result_op, LIR_Opr left_op, LIR_Opr right_op) { 623 if (TwoOperandLIRForm && left_op != result_op) { 624 assert(right_op != result_op, "malformed"); 625 __ move(left_op, result_op); 626 left_op = result_op; 627 } 628 629 switch(code) { 630 case Bytecodes::_iand: 631 case Bytecodes::_land: __ logical_and(left_op, right_op, result_op); break; 632 633 case Bytecodes::_ior: 634 case Bytecodes::_lor: __ logical_or(left_op, right_op, result_op); break; 635 636 case Bytecodes::_ixor: 637 case Bytecodes::_lxor: __ logical_xor(left_op, right_op, result_op); break; 638 639 default: ShouldNotReachHere(); 640 } 641 } 642 643 644 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) { 645 if (!GenerateSynchronizationCode) return; 646 // for slow path, use debug info for state after successful locking 647 CodeStub* slow_path = new MonitorEnterStub(object, lock, info); 648 __ load_stack_address_monitor(monitor_no, lock); 649 // for handling NullPointerException, use debug info representing just the lock stack before this monitorenter 650 __ lock_object(hdr, object, lock, scratch, slow_path, info_for_exception); 651 } 652 653 654 void LIRGenerator::monitor_exit(LIR_Opr object, LIR_Opr lock, LIR_Opr new_hdr, LIR_Opr scratch, int monitor_no) { 655 if (!GenerateSynchronizationCode) return; 656 // setup registers 657 LIR_Opr hdr = lock; 658 lock = new_hdr; 659 CodeStub* slow_path = new MonitorExitStub(lock, UseFastLocking, monitor_no); 660 __ load_stack_address_monitor(monitor_no, lock); 661 __ unlock_object(hdr, object, lock, scratch, slow_path); 662 } 663 664 #ifndef PRODUCT 665 void LIRGenerator::print_if_not_loaded(const NewInstance* new_instance) { 666 if (PrintNotLoaded && !new_instance->klass()->is_loaded()) { 667 tty->print_cr(" ###class not loaded at new bci %d", new_instance->printable_bci()); 668 } else if (PrintNotLoaded && (TieredCompilation && new_instance->is_unresolved())) { 669 tty->print_cr(" ###class not resolved at new bci %d", new_instance->printable_bci()); 670 } 671 } 672 #endif 673 674 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) { 675 klass2reg_with_patching(klass_reg, klass, info, is_unresolved); 676 // If klass is not loaded we do not know if the klass has finalizers: 677 if (UseFastNewInstance && klass->is_loaded() 678 && !Klass::layout_helper_needs_slow_path(klass->layout_helper())) { 679 680 Runtime1::StubID stub_id = klass->is_initialized() ? Runtime1::fast_new_instance_id : Runtime1::fast_new_instance_init_check_id; 681 682 CodeStub* slow_path = new NewInstanceStub(klass_reg, dst, klass, info, stub_id); 683 684 assert(klass->is_loaded(), "must be loaded"); 685 // allocate space for instance 686 assert(klass->size_helper() >= 0, "illegal instance size"); 687 const int instance_size = align_object_size(klass->size_helper()); 688 __ allocate_object(dst, scratch1, scratch2, scratch3, scratch4, 689 oopDesc::header_size(), instance_size, klass_reg, !klass->is_initialized(), slow_path); 690 } else { 691 CodeStub* slow_path = new NewInstanceStub(klass_reg, dst, klass, info, Runtime1::new_instance_id); 692 __ branch(lir_cond_always, T_ILLEGAL, slow_path); 693 __ branch_destination(slow_path->continuation()); 694 } 695 } 696 697 698 static bool is_constant_zero(Instruction* inst) { 699 IntConstant* c = inst->type()->as_IntConstant(); 700 if (c) { 701 return (c->value() == 0); 702 } 703 return false; 704 } 705 706 707 static bool positive_constant(Instruction* inst) { 708 IntConstant* c = inst->type()->as_IntConstant(); 709 if (c) { 710 return (c->value() >= 0); 711 } 712 return false; 713 } 714 715 716 static ciArrayKlass* as_array_klass(ciType* type) { 717 if (type != NULL && type->is_array_klass() && type->is_loaded()) { 718 return (ciArrayKlass*)type; 719 } else { 720 return NULL; 721 } 722 } 723 724 static ciType* phi_declared_type(Phi* phi) { 725 ciType* t = phi->operand_at(0)->declared_type(); 726 if (t == NULL) { 727 return NULL; 728 } 729 for(int i = 1; i < phi->operand_count(); i++) { 730 if (t != phi->operand_at(i)->declared_type()) { 731 return NULL; 732 } 733 } 734 return t; 735 } 736 737 void LIRGenerator::arraycopy_helper(Intrinsic* x, int* flagsp, ciArrayKlass** expected_typep) { 738 Instruction* src = x->argument_at(0); 739 Instruction* src_pos = x->argument_at(1); 740 Instruction* dst = x->argument_at(2); 741 Instruction* dst_pos = x->argument_at(3); 742 Instruction* length = x->argument_at(4); 743 744 // first try to identify the likely type of the arrays involved 745 ciArrayKlass* expected_type = NULL; 746 bool is_exact = false, src_objarray = false, dst_objarray = false; 747 { 748 ciArrayKlass* src_exact_type = as_array_klass(src->exact_type()); 749 ciArrayKlass* src_declared_type = as_array_klass(src->declared_type()); 750 Phi* phi; 751 if (src_declared_type == NULL && (phi = src->as_Phi()) != NULL) { 752 src_declared_type = as_array_klass(phi_declared_type(phi)); 753 } 754 ciArrayKlass* dst_exact_type = as_array_klass(dst->exact_type()); 755 ciArrayKlass* dst_declared_type = as_array_klass(dst->declared_type()); 756 if (dst_declared_type == NULL && (phi = dst->as_Phi()) != NULL) { 757 dst_declared_type = as_array_klass(phi_declared_type(phi)); 758 } 759 760 if (src_exact_type != NULL && src_exact_type == dst_exact_type) { 761 // the types exactly match so the type is fully known 762 is_exact = true; 763 expected_type = src_exact_type; 764 } else if (dst_exact_type != NULL && dst_exact_type->is_obj_array_klass()) { 765 ciArrayKlass* dst_type = (ciArrayKlass*) dst_exact_type; 766 ciArrayKlass* src_type = NULL; 767 if (src_exact_type != NULL && src_exact_type->is_obj_array_klass()) { 768 src_type = (ciArrayKlass*) src_exact_type; 769 } else if (src_declared_type != NULL && src_declared_type->is_obj_array_klass()) { 770 src_type = (ciArrayKlass*) src_declared_type; 771 } 772 if (src_type != NULL) { 773 if (src_type->element_type()->is_subtype_of(dst_type->element_type())) { 774 is_exact = true; 775 expected_type = dst_type; 776 } 777 } 778 } 779 // at least pass along a good guess 780 if (expected_type == NULL) expected_type = dst_exact_type; 781 if (expected_type == NULL) expected_type = src_declared_type; 782 if (expected_type == NULL) expected_type = dst_declared_type; 783 784 src_objarray = (src_exact_type && src_exact_type->is_obj_array_klass()) || (src_declared_type && src_declared_type->is_obj_array_klass()); 785 dst_objarray = (dst_exact_type && dst_exact_type->is_obj_array_klass()) || (dst_declared_type && dst_declared_type->is_obj_array_klass()); 786 } 787 788 // if a probable array type has been identified, figure out if any 789 // of the required checks for a fast case can be elided. 790 int flags = LIR_OpArrayCopy::all_flags; 791 792 if (!src_objarray) 793 flags &= ~LIR_OpArrayCopy::src_objarray; 794 if (!dst_objarray) 795 flags &= ~LIR_OpArrayCopy::dst_objarray; 796 797 if (!x->arg_needs_null_check(0)) 798 flags &= ~LIR_OpArrayCopy::src_null_check; 799 if (!x->arg_needs_null_check(2)) 800 flags &= ~LIR_OpArrayCopy::dst_null_check; 801 802 803 if (expected_type != NULL) { 804 Value length_limit = NULL; 805 806 IfOp* ifop = length->as_IfOp(); 807 if (ifop != NULL) { 808 // look for expressions like min(v, a.length) which ends up as 809 // x > y ? y : x or x >= y ? y : x 810 if ((ifop->cond() == If::gtr || ifop->cond() == If::geq) && 811 ifop->x() == ifop->fval() && 812 ifop->y() == ifop->tval()) { 813 length_limit = ifop->y(); 814 } 815 } 816 817 // try to skip null checks and range checks 818 NewArray* src_array = src->as_NewArray(); 819 if (src_array != NULL) { 820 flags &= ~LIR_OpArrayCopy::src_null_check; 821 if (length_limit != NULL && 822 src_array->length() == length_limit && 823 is_constant_zero(src_pos)) { 824 flags &= ~LIR_OpArrayCopy::src_range_check; 825 } 826 } 827 828 NewArray* dst_array = dst->as_NewArray(); 829 if (dst_array != NULL) { 830 flags &= ~LIR_OpArrayCopy::dst_null_check; 831 if (length_limit != NULL && 832 dst_array->length() == length_limit && 833 is_constant_zero(dst_pos)) { 834 flags &= ~LIR_OpArrayCopy::dst_range_check; 835 } 836 } 837 838 // check from incoming constant values 839 if (positive_constant(src_pos)) 840 flags &= ~LIR_OpArrayCopy::src_pos_positive_check; 841 if (positive_constant(dst_pos)) 842 flags &= ~LIR_OpArrayCopy::dst_pos_positive_check; 843 if (positive_constant(length)) 844 flags &= ~LIR_OpArrayCopy::length_positive_check; 845 846 // see if the range check can be elided, which might also imply 847 // that src or dst is non-null. 848 ArrayLength* al = length->as_ArrayLength(); 849 if (al != NULL) { 850 if (al->array() == src) { 851 // it's the length of the source array 852 flags &= ~LIR_OpArrayCopy::length_positive_check; 853 flags &= ~LIR_OpArrayCopy::src_null_check; 854 if (is_constant_zero(src_pos)) 855 flags &= ~LIR_OpArrayCopy::src_range_check; 856 } 857 if (al->array() == dst) { 858 // it's the length of the destination array 859 flags &= ~LIR_OpArrayCopy::length_positive_check; 860 flags &= ~LIR_OpArrayCopy::dst_null_check; 861 if (is_constant_zero(dst_pos)) 862 flags &= ~LIR_OpArrayCopy::dst_range_check; 863 } 864 } 865 if (is_exact) { 866 flags &= ~LIR_OpArrayCopy::type_check; 867 } 868 } 869 870 IntConstant* src_int = src_pos->type()->as_IntConstant(); 871 IntConstant* dst_int = dst_pos->type()->as_IntConstant(); 872 if (src_int && dst_int) { 873 int s_offs = src_int->value(); 874 int d_offs = dst_int->value(); 875 if (src_int->value() >= dst_int->value()) { 876 flags &= ~LIR_OpArrayCopy::overlapping; 877 } 878 if (expected_type != NULL) { 879 BasicType t = expected_type->element_type()->basic_type(); 880 int element_size = type2aelembytes(t); 881 if (((arrayOopDesc::base_offset_in_bytes(t) + s_offs * element_size) % HeapWordSize == 0) && 882 ((arrayOopDesc::base_offset_in_bytes(t) + d_offs * element_size) % HeapWordSize == 0)) { 883 flags &= ~LIR_OpArrayCopy::unaligned; 884 } 885 } 886 } else if (src_pos == dst_pos || is_constant_zero(dst_pos)) { 887 // src and dest positions are the same, or dst is zero so assume 888 // nonoverlapping copy. 889 flags &= ~LIR_OpArrayCopy::overlapping; 890 } 891 892 if (src == dst) { 893 // moving within a single array so no type checks are needed 894 if (flags & LIR_OpArrayCopy::type_check) { 895 flags &= ~LIR_OpArrayCopy::type_check; 896 } 897 } 898 *flagsp = flags; 899 *expected_typep = (ciArrayKlass*)expected_type; 900 } 901 902 903 LIR_Opr LIRGenerator::round_item(LIR_Opr opr) { 904 assert(opr->is_register(), "why spill if item is not register?"); 905 906 if (RoundFPResults && UseSSE < 1 && opr->is_single_fpu()) { 907 LIR_Opr result = new_register(T_FLOAT); 908 set_vreg_flag(result, must_start_in_memory); 909 assert(opr->is_register(), "only a register can be spilled"); 910 assert(opr->value_type()->is_float(), "rounding only for floats available"); 911 __ roundfp(opr, LIR_OprFact::illegalOpr, result); 912 return result; 913 } 914 return opr; 915 } 916 917 918 LIR_Opr LIRGenerator::force_to_spill(LIR_Opr value, BasicType t) { 919 assert(type2size[t] == type2size[value->type()], 920 "size mismatch: t=%s, value->type()=%s", type2name(t), type2name(value->type())); 921 if (!value->is_register()) { 922 // force into a register 923 LIR_Opr r = new_register(value->type()); 924 __ move(value, r); 925 value = r; 926 } 927 928 // create a spill location 929 LIR_Opr tmp = new_register(t); 930 set_vreg_flag(tmp, LIRGenerator::must_start_in_memory); 931 932 // move from register to spill 933 __ move(value, tmp); 934 return tmp; 935 } 936 937 void LIRGenerator::profile_branch(If* if_instr, If::Condition cond) { 938 if (if_instr->should_profile()) { 939 ciMethod* method = if_instr->profiled_method(); 940 assert(method != NULL, "method should be set if branch is profiled"); 941 ciMethodData* md = method->method_data_or_null(); 942 assert(md != NULL, "Sanity"); 943 ciProfileData* data = md->bci_to_data(if_instr->profiled_bci()); 944 assert(data != NULL, "must have profiling data"); 945 assert(data->is_BranchData(), "need BranchData for two-way branches"); 946 int taken_count_offset = md->byte_offset_of_slot(data, BranchData::taken_offset()); 947 int not_taken_count_offset = md->byte_offset_of_slot(data, BranchData::not_taken_offset()); 948 if (if_instr->is_swapped()) { 949 int t = taken_count_offset; 950 taken_count_offset = not_taken_count_offset; 951 not_taken_count_offset = t; 952 } 953 954 LIR_Opr md_reg = new_register(T_METADATA); 955 __ metadata2reg(md->constant_encoding(), md_reg); 956 957 LIR_Opr data_offset_reg = new_pointer_register(); 958 __ cmove(lir_cond(cond), 959 LIR_OprFact::intptrConst(taken_count_offset), 960 LIR_OprFact::intptrConst(not_taken_count_offset), 961 data_offset_reg, as_BasicType(if_instr->x()->type())); 962 963 // MDO cells are intptr_t, so the data_reg width is arch-dependent. 964 LIR_Opr data_reg = new_pointer_register(); 965 LIR_Address* data_addr = new LIR_Address(md_reg, data_offset_reg, data_reg->type()); 966 __ move(data_addr, data_reg); 967 // Use leal instead of add to avoid destroying condition codes on x86 968 LIR_Address* fake_incr_value = new LIR_Address(data_reg, DataLayout::counter_increment, T_INT); 969 __ leal(LIR_OprFact::address(fake_incr_value), data_reg); 970 __ move(data_reg, data_addr); 971 } 972 } 973 974 // Phi technique: 975 // This is about passing live values from one basic block to the other. 976 // In code generated with Java it is rather rare that more than one 977 // value is on the stack from one basic block to the other. 978 // We optimize our technique for efficient passing of one value 979 // (of type long, int, double..) but it can be extended. 980 // When entering or leaving a basic block, all registers and all spill 981 // slots are release and empty. We use the released registers 982 // and spill slots to pass the live values from one block 983 // to the other. The topmost value, i.e., the value on TOS of expression 984 // stack is passed in registers. All other values are stored in spilling 985 // area. Every Phi has an index which designates its spill slot 986 // At exit of a basic block, we fill the register(s) and spill slots. 987 // At entry of a basic block, the block_prolog sets up the content of phi nodes 988 // and locks necessary registers and spilling slots. 989 990 991 // move current value to referenced phi function 992 void LIRGenerator::move_to_phi(PhiResolver* resolver, Value cur_val, Value sux_val) { 993 Phi* phi = sux_val->as_Phi(); 994 // cur_val can be null without phi being null in conjunction with inlining 995 if (phi != NULL && cur_val != NULL && cur_val != phi && !phi->is_illegal()) { 996 Phi* cur_phi = cur_val->as_Phi(); 997 if (cur_phi != NULL && cur_phi->is_illegal()) { 998 // Phi and local would need to get invalidated 999 // (which is unexpected for Linear Scan). 1000 // But this case is very rare so we simply bail out. 1001 bailout("propagation of illegal phi"); 1002 return; 1003 } 1004 LIR_Opr operand = cur_val->operand(); 1005 if (operand->is_illegal()) { 1006 assert(cur_val->as_Constant() != NULL || cur_val->as_Local() != NULL, 1007 "these can be produced lazily"); 1008 operand = operand_for_instruction(cur_val); 1009 } 1010 resolver->move(operand, operand_for_instruction(phi)); 1011 } 1012 } 1013 1014 1015 // Moves all stack values into their PHI position 1016 void LIRGenerator::move_to_phi(ValueStack* cur_state) { 1017 BlockBegin* bb = block(); 1018 if (bb->number_of_sux() == 1) { 1019 BlockBegin* sux = bb->sux_at(0); 1020 assert(sux->number_of_preds() > 0, "invalid CFG"); 1021 1022 // a block with only one predecessor never has phi functions 1023 if (sux->number_of_preds() > 1) { 1024 int max_phis = cur_state->stack_size() + cur_state->locals_size(); 1025 PhiResolver resolver(this, _virtual_register_number + max_phis * 2); 1026 1027 ValueStack* sux_state = sux->state(); 1028 Value sux_value; 1029 int index; 1030 1031 assert(cur_state->scope() == sux_state->scope(), "not matching"); 1032 assert(cur_state->locals_size() == sux_state->locals_size(), "not matching"); 1033 assert(cur_state->stack_size() == sux_state->stack_size(), "not matching"); 1034 1035 for_each_stack_value(sux_state, index, sux_value) { 1036 move_to_phi(&resolver, cur_state->stack_at(index), sux_value); 1037 } 1038 1039 for_each_local_value(sux_state, index, sux_value) { 1040 move_to_phi(&resolver, cur_state->local_at(index), sux_value); 1041 } 1042 1043 assert(cur_state->caller_state() == sux_state->caller_state(), "caller states must be equal"); 1044 } 1045 } 1046 } 1047 1048 1049 LIR_Opr LIRGenerator::new_register(BasicType type) { 1050 int vreg = _virtual_register_number; 1051 // add a little fudge factor for the bailout, since the bailout is 1052 // only checked periodically. This gives a few extra registers to 1053 // hand out before we really run out, which helps us keep from 1054 // tripping over assertions. 1055 if (vreg + 20 >= LIR_OprDesc::vreg_max) { 1056 bailout("out of virtual registers"); 1057 if (vreg + 2 >= LIR_OprDesc::vreg_max) { 1058 // wrap it around 1059 _virtual_register_number = LIR_OprDesc::vreg_base; 1060 } 1061 } 1062 _virtual_register_number += 1; 1063 return LIR_OprFact::virtual_register(vreg, type); 1064 } 1065 1066 1067 // Try to lock using register in hint 1068 LIR_Opr LIRGenerator::rlock(Value instr) { 1069 return new_register(instr->type()); 1070 } 1071 1072 1073 // does an rlock and sets result 1074 LIR_Opr LIRGenerator::rlock_result(Value x) { 1075 LIR_Opr reg = rlock(x); 1076 set_result(x, reg); 1077 return reg; 1078 } 1079 1080 1081 // does an rlock and sets result 1082 LIR_Opr LIRGenerator::rlock_result(Value x, BasicType type) { 1083 LIR_Opr reg; 1084 switch (type) { 1085 case T_BYTE: 1086 case T_BOOLEAN: 1087 reg = rlock_byte(type); 1088 break; 1089 default: 1090 reg = rlock(x); 1091 break; 1092 } 1093 1094 set_result(x, reg); 1095 return reg; 1096 } 1097 1098 1099 //--------------------------------------------------------------------- 1100 ciObject* LIRGenerator::get_jobject_constant(Value value) { 1101 ObjectType* oc = value->type()->as_ObjectType(); 1102 if (oc) { 1103 return oc->constant_value(); 1104 } 1105 return NULL; 1106 } 1107 1108 1109 void LIRGenerator::do_ExceptionObject(ExceptionObject* x) { 1110 assert(block()->is_set(BlockBegin::exception_entry_flag), "ExceptionObject only allowed in exception handler block"); 1111 assert(block()->next() == x, "ExceptionObject must be first instruction of block"); 1112 1113 // no moves are created for phi functions at the begin of exception 1114 // handlers, so assign operands manually here 1115 for_each_phi_fun(block(), phi, 1116 operand_for_instruction(phi)); 1117 1118 LIR_Opr thread_reg = getThreadPointer(); 1119 __ move_wide(new LIR_Address(thread_reg, in_bytes(JavaThread::exception_oop_offset()), T_OBJECT), 1120 exceptionOopOpr()); 1121 __ move_wide(LIR_OprFact::oopConst(NULL), 1122 new LIR_Address(thread_reg, in_bytes(JavaThread::exception_oop_offset()), T_OBJECT)); 1123 __ move_wide(LIR_OprFact::oopConst(NULL), 1124 new LIR_Address(thread_reg, in_bytes(JavaThread::exception_pc_offset()), T_OBJECT)); 1125 1126 LIR_Opr result = new_register(T_OBJECT); 1127 __ move(exceptionOopOpr(), result); 1128 set_result(x, result); 1129 } 1130 1131 1132 //---------------------------------------------------------------------- 1133 //---------------------------------------------------------------------- 1134 //---------------------------------------------------------------------- 1135 //---------------------------------------------------------------------- 1136 // visitor functions 1137 //---------------------------------------------------------------------- 1138 //---------------------------------------------------------------------- 1139 //---------------------------------------------------------------------- 1140 //---------------------------------------------------------------------- 1141 1142 void LIRGenerator::do_Phi(Phi* x) { 1143 // phi functions are never visited directly 1144 ShouldNotReachHere(); 1145 } 1146 1147 1148 // Code for a constant is generated lazily unless the constant is frequently used and can't be inlined. 1149 void LIRGenerator::do_Constant(Constant* x) { 1150 if (x->state_before() != NULL) { 1151 // Any constant with a ValueStack requires patching so emit the patch here 1152 LIR_Opr reg = rlock_result(x); 1153 CodeEmitInfo* info = state_for(x, x->state_before()); 1154 __ oop2reg_patch(NULL, reg, info); 1155 } else if (x->use_count() > 1 && !can_inline_as_constant(x)) { 1156 if (!x->is_pinned()) { 1157 // unpinned constants are handled specially so that they can be 1158 // put into registers when they are used multiple times within a 1159 // block. After the block completes their operand will be 1160 // cleared so that other blocks can't refer to that register. 1161 set_result(x, load_constant(x)); 1162 } else { 1163 LIR_Opr res = x->operand(); 1164 if (!res->is_valid()) { 1165 res = LIR_OprFact::value_type(x->type()); 1166 } 1167 if (res->is_constant()) { 1168 LIR_Opr reg = rlock_result(x); 1169 __ move(res, reg); 1170 } else { 1171 set_result(x, res); 1172 } 1173 } 1174 } else { 1175 set_result(x, LIR_OprFact::value_type(x->type())); 1176 } 1177 } 1178 1179 1180 void LIRGenerator::do_Local(Local* x) { 1181 // operand_for_instruction has the side effect of setting the result 1182 // so there's no need to do it here. 1183 operand_for_instruction(x); 1184 } 1185 1186 1187 void LIRGenerator::do_IfInstanceOf(IfInstanceOf* x) { 1188 Unimplemented(); 1189 } 1190 1191 1192 void LIRGenerator::do_Return(Return* x) { 1193 if (compilation()->env()->dtrace_method_probes()) { 1194 BasicTypeList signature; 1195 signature.append(LP64_ONLY(T_LONG) NOT_LP64(T_INT)); // thread 1196 signature.append(T_METADATA); // Method* 1197 LIR_OprList* args = new LIR_OprList(); 1198 args->append(getThreadPointer()); 1199 LIR_Opr meth = new_register(T_METADATA); 1200 __ metadata2reg(method()->constant_encoding(), meth); 1201 args->append(meth); 1202 call_runtime(&signature, args, CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_exit), voidType, NULL); 1203 } 1204 1205 if (x->type()->is_void()) { 1206 __ return_op(LIR_OprFact::illegalOpr); 1207 } else { 1208 LIR_Opr reg = result_register_for(x->type(), /*callee=*/true); 1209 LIRItem result(x->result(), this); 1210 1211 result.load_item_force(reg); 1212 __ return_op(result.result()); 1213 } 1214 set_no_result(x); 1215 } 1216 1217 // Examble: ref.get() 1218 // Combination of LoadField and g1 pre-write barrier 1219 void LIRGenerator::do_Reference_get(Intrinsic* x) { 1220 1221 const int referent_offset = java_lang_ref_Reference::referent_offset; 1222 guarantee(referent_offset > 0, "referent offset not initialized"); 1223 1224 assert(x->number_of_arguments() == 1, "wrong type"); 1225 1226 LIRItem reference(x->argument_at(0), this); 1227 reference.load_item(); 1228 1229 // need to perform the null check on the reference objecy 1230 CodeEmitInfo* info = NULL; 1231 if (x->needs_null_check()) { 1232 info = state_for(x); 1233 } 1234 1235 LIR_Opr result = rlock_result(x, T_OBJECT); 1236 access_load_at(IN_HEAP | ON_WEAK_OOP_REF, T_OBJECT, 1237 reference, LIR_OprFact::intConst(referent_offset), result); 1238 } 1239 1240 // Example: clazz.isInstance(object) 1241 void LIRGenerator::do_isInstance(Intrinsic* x) { 1242 assert(x->number_of_arguments() == 2, "wrong type"); 1243 1244 // TODO could try to substitute this node with an equivalent InstanceOf 1245 // if clazz is known to be a constant Class. This will pick up newly found 1246 // constants after HIR construction. I'll leave this to a future change. 1247 1248 // as a first cut, make a simple leaf call to runtime to stay platform independent. 1249 // could follow the aastore example in a future change. 1250 1251 LIRItem clazz(x->argument_at(0), this); 1252 LIRItem object(x->argument_at(1), this); 1253 clazz.load_item(); 1254 object.load_item(); 1255 LIR_Opr result = rlock_result(x); 1256 1257 // need to perform null check on clazz 1258 if (x->needs_null_check()) { 1259 CodeEmitInfo* info = state_for(x); 1260 __ null_check(clazz.result(), info); 1261 } 1262 1263 LIR_Opr call_result = call_runtime(clazz.value(), object.value(), 1264 CAST_FROM_FN_PTR(address, Runtime1::is_instance_of), 1265 x->type(), 1266 NULL); // NULL CodeEmitInfo results in a leaf call 1267 __ move(call_result, result); 1268 } 1269 1270 // Example: object.getClass () 1271 void LIRGenerator::do_getClass(Intrinsic* x) { 1272 assert(x->number_of_arguments() == 1, "wrong type"); 1273 1274 LIRItem rcvr(x->argument_at(0), this); 1275 rcvr.load_item(); 1276 LIR_Opr temp = new_register(T_METADATA); 1277 LIR_Opr result = rlock_result(x); 1278 1279 // need to perform the null check on the rcvr 1280 CodeEmitInfo* info = NULL; 1281 if (x->needs_null_check()) { 1282 info = state_for(x); 1283 } 1284 1285 // FIXME T_ADDRESS should actually be T_METADATA but it can't because the 1286 // meaning of these two is mixed up (see JDK-8026837). 1287 __ move(new LIR_Address(rcvr.result(), oopDesc::klass_offset_in_bytes(), T_ADDRESS), temp, info); 1288 __ move_wide(new LIR_Address(temp, in_bytes(Klass::java_mirror_offset()), T_ADDRESS), temp); 1289 // mirror = ((OopHandle)mirror)->resolve(); 1290 access_load(IN_NATIVE, T_OBJECT, 1291 LIR_OprFact::address(new LIR_Address(temp, T_OBJECT)), result); 1292 } 1293 1294 // java.lang.Class::isPrimitive() 1295 void LIRGenerator::do_isPrimitive(Intrinsic* x) { 1296 assert(x->number_of_arguments() == 1, "wrong type"); 1297 1298 LIRItem rcvr(x->argument_at(0), this); 1299 rcvr.load_item(); 1300 LIR_Opr temp = new_register(T_METADATA); 1301 LIR_Opr result = rlock_result(x); 1302 1303 CodeEmitInfo* info = NULL; 1304 if (x->needs_null_check()) { 1305 info = state_for(x); 1306 } 1307 1308 __ move(new LIR_Address(rcvr.result(), java_lang_Class::klass_offset_in_bytes(), T_ADDRESS), temp, info); 1309 __ cmp(lir_cond_notEqual, temp, LIR_OprFact::intConst(0)); 1310 __ cmove(lir_cond_notEqual, LIR_OprFact::intConst(0), LIR_OprFact::intConst(1), result, T_BOOLEAN); 1311 } 1312 1313 1314 // Example: Thread.currentThread() 1315 void LIRGenerator::do_currentThread(Intrinsic* x) { 1316 assert(x->number_of_arguments() == 0, "wrong type"); 1317 LIR_Opr reg = rlock_result(x); 1318 __ move_wide(new LIR_Address(getThreadPointer(), in_bytes(JavaThread::threadObj_offset()), T_OBJECT), reg); 1319 } 1320 1321 1322 void LIRGenerator::do_RegisterFinalizer(Intrinsic* x) { 1323 assert(x->number_of_arguments() == 1, "wrong type"); 1324 LIRItem receiver(x->argument_at(0), this); 1325 1326 receiver.load_item(); 1327 BasicTypeList signature; 1328 signature.append(T_OBJECT); // receiver 1329 LIR_OprList* args = new LIR_OprList(); 1330 args->append(receiver.result()); 1331 CodeEmitInfo* info = state_for(x, x->state()); 1332 call_runtime(&signature, args, 1333 CAST_FROM_FN_PTR(address, Runtime1::entry_for(Runtime1::register_finalizer_id)), 1334 voidType, info); 1335 1336 set_no_result(x); 1337 } 1338 1339 1340 //------------------------local access-------------------------------------- 1341 1342 LIR_Opr LIRGenerator::operand_for_instruction(Instruction* x) { 1343 if (x->operand()->is_illegal()) { 1344 Constant* c = x->as_Constant(); 1345 if (c != NULL) { 1346 x->set_operand(LIR_OprFact::value_type(c->type())); 1347 } else { 1348 assert(x->as_Phi() || x->as_Local() != NULL, "only for Phi and Local"); 1349 // allocate a virtual register for this local or phi 1350 x->set_operand(rlock(x)); 1351 _instruction_for_operand.at_put_grow(x->operand()->vreg_number(), x, NULL); 1352 } 1353 } 1354 return x->operand(); 1355 } 1356 1357 1358 Instruction* LIRGenerator::instruction_for_opr(LIR_Opr opr) { 1359 if (opr->is_virtual()) { 1360 return instruction_for_vreg(opr->vreg_number()); 1361 } 1362 return NULL; 1363 } 1364 1365 1366 Instruction* LIRGenerator::instruction_for_vreg(int reg_num) { 1367 if (reg_num < _instruction_for_operand.length()) { 1368 return _instruction_for_operand.at(reg_num); 1369 } 1370 return NULL; 1371 } 1372 1373 1374 void LIRGenerator::set_vreg_flag(int vreg_num, VregFlag f) { 1375 if (_vreg_flags.size_in_bits() == 0) { 1376 BitMap2D temp(100, num_vreg_flags); 1377 _vreg_flags = temp; 1378 } 1379 _vreg_flags.at_put_grow(vreg_num, f, true); 1380 } 1381 1382 bool LIRGenerator::is_vreg_flag_set(int vreg_num, VregFlag f) { 1383 if (!_vreg_flags.is_valid_index(vreg_num, f)) { 1384 return false; 1385 } 1386 return _vreg_flags.at(vreg_num, f); 1387 } 1388 1389 1390 // Block local constant handling. This code is useful for keeping 1391 // unpinned constants and constants which aren't exposed in the IR in 1392 // registers. Unpinned Constant instructions have their operands 1393 // cleared when the block is finished so that other blocks can't end 1394 // up referring to their registers. 1395 1396 LIR_Opr LIRGenerator::load_constant(Constant* x) { 1397 assert(!x->is_pinned(), "only for unpinned constants"); 1398 _unpinned_constants.append(x); 1399 return load_constant(LIR_OprFact::value_type(x->type())->as_constant_ptr()); 1400 } 1401 1402 1403 LIR_Opr LIRGenerator::load_constant(LIR_Const* c) { 1404 BasicType t = c->type(); 1405 for (int i = 0; i < _constants.length(); i++) { 1406 LIR_Const* other = _constants.at(i); 1407 if (t == other->type()) { 1408 switch (t) { 1409 case T_INT: 1410 case T_FLOAT: 1411 if (c->as_jint_bits() != other->as_jint_bits()) continue; 1412 break; 1413 case T_LONG: 1414 case T_DOUBLE: 1415 if (c->as_jint_hi_bits() != other->as_jint_hi_bits()) continue; 1416 if (c->as_jint_lo_bits() != other->as_jint_lo_bits()) continue; 1417 break; 1418 case T_OBJECT: 1419 if (c->as_jobject() != other->as_jobject()) continue; 1420 break; 1421 default: 1422 break; 1423 } 1424 return _reg_for_constants.at(i); 1425 } 1426 } 1427 1428 LIR_Opr result = new_register(t); 1429 __ move((LIR_Opr)c, result); 1430 _constants.append(c); 1431 _reg_for_constants.append(result); 1432 return result; 1433 } 1434 1435 //------------------------field access-------------------------------------- 1436 1437 void LIRGenerator::do_CompareAndSwap(Intrinsic* x, ValueType* type) { 1438 assert(x->number_of_arguments() == 4, "wrong type"); 1439 LIRItem obj (x->argument_at(0), this); // object 1440 LIRItem offset(x->argument_at(1), this); // offset of field 1441 LIRItem cmp (x->argument_at(2), this); // value to compare with field 1442 LIRItem val (x->argument_at(3), this); // replace field with val if matches cmp 1443 assert(obj.type()->tag() == objectTag, "invalid type"); 1444 1445 // In 64bit the type can be long, sparc doesn't have this assert 1446 // assert(offset.type()->tag() == intTag, "invalid type"); 1447 1448 assert(cmp.type()->tag() == type->tag(), "invalid type"); 1449 assert(val.type()->tag() == type->tag(), "invalid type"); 1450 1451 LIR_Opr result = access_atomic_cmpxchg_at(IN_HEAP, as_BasicType(type), 1452 obj, offset, cmp, val); 1453 set_result(x, result); 1454 } 1455 1456 // Comment copied form templateTable_i486.cpp 1457 // ---------------------------------------------------------------------------- 1458 // Volatile variables demand their effects be made known to all CPU's in 1459 // order. Store buffers on most chips allow reads & writes to reorder; the 1460 // JMM's ReadAfterWrite.java test fails in -Xint mode without some kind of 1461 // memory barrier (i.e., it's not sufficient that the interpreter does not 1462 // reorder volatile references, the hardware also must not reorder them). 1463 // 1464 // According to the new Java Memory Model (JMM): 1465 // (1) All volatiles are serialized wrt to each other. 1466 // ALSO reads & writes act as aquire & release, so: 1467 // (2) A read cannot let unrelated NON-volatile memory refs that happen after 1468 // the read float up to before the read. It's OK for non-volatile memory refs 1469 // that happen before the volatile read to float down below it. 1470 // (3) Similar a volatile write cannot let unrelated NON-volatile memory refs 1471 // that happen BEFORE the write float down to after the write. It's OK for 1472 // non-volatile memory refs that happen after the volatile write to float up 1473 // before it. 1474 // 1475 // We only put in barriers around volatile refs (they are expensive), not 1476 // _between_ memory refs (that would require us to track the flavor of the 1477 // previous memory refs). Requirements (2) and (3) require some barriers 1478 // before volatile stores and after volatile loads. These nearly cover 1479 // requirement (1) but miss the volatile-store-volatile-load case. This final 1480 // case is placed after volatile-stores although it could just as well go 1481 // before volatile-loads. 1482 1483 1484 void LIRGenerator::do_StoreField(StoreField* x) { 1485 bool needs_patching = x->needs_patching(); 1486 bool is_volatile = x->field()->is_volatile(); 1487 BasicType field_type = x->field_type(); 1488 1489 CodeEmitInfo* info = NULL; 1490 if (needs_patching) { 1491 assert(x->explicit_null_check() == NULL, "can't fold null check into patching field access"); 1492 info = state_for(x, x->state_before()); 1493 } else if (x->needs_null_check()) { 1494 NullCheck* nc = x->explicit_null_check(); 1495 if (nc == NULL) { 1496 info = state_for(x); 1497 } else { 1498 info = state_for(nc); 1499 } 1500 } 1501 1502 LIRItem object(x->obj(), this); 1503 LIRItem value(x->value(), this); 1504 1505 object.load_item(); 1506 1507 if (is_volatile || needs_patching) { 1508 // load item if field is volatile (fewer special cases for volatiles) 1509 // load item if field not initialized 1510 // load item if field not constant 1511 // because of code patching we cannot inline constants 1512 if (field_type == T_BYTE || field_type == T_BOOLEAN) { 1513 value.load_byte_item(); 1514 } else { 1515 value.load_item(); 1516 } 1517 } else { 1518 value.load_for_store(field_type); 1519 } 1520 1521 set_no_result(x); 1522 1523 #ifndef PRODUCT 1524 if (PrintNotLoaded && needs_patching) { 1525 tty->print_cr(" ###class not loaded at store_%s bci %d", 1526 x->is_static() ? "static" : "field", x->printable_bci()); 1527 } 1528 #endif 1529 1530 if (x->needs_null_check() && 1531 (needs_patching || 1532 MacroAssembler::needs_explicit_null_check(x->offset()))) { 1533 // Emit an explicit null check because the offset is too large. 1534 // If the class is not loaded and the object is NULL, we need to deoptimize to throw a 1535 // NoClassDefFoundError in the interpreter instead of an implicit NPE from compiled code. 1536 __ null_check(object.result(), new CodeEmitInfo(info), /* deoptimize */ needs_patching); 1537 } 1538 1539 DecoratorSet decorators = IN_HEAP; 1540 if (is_volatile) { 1541 decorators |= MO_SEQ_CST; 1542 } 1543 if (needs_patching) { 1544 decorators |= C1_NEEDS_PATCHING; 1545 } 1546 1547 access_store_at(decorators, field_type, object, LIR_OprFact::intConst(x->offset()), 1548 value.result(), info != NULL ? new CodeEmitInfo(info) : NULL, info); 1549 } 1550 1551 void LIRGenerator::do_StoreIndexed(StoreIndexed* x) { 1552 assert(x->is_pinned(),""); 1553 bool needs_range_check = x->compute_needs_range_check(); 1554 bool use_length = x->length() != NULL; 1555 bool obj_store = x->elt_type() == T_ARRAY || x->elt_type() == T_OBJECT; 1556 bool needs_store_check = obj_store && (x->value()->as_Constant() == NULL || 1557 !get_jobject_constant(x->value())->is_null_object() || 1558 x->should_profile()); 1559 1560 LIRItem array(x->array(), this); 1561 LIRItem index(x->index(), this); 1562 LIRItem value(x->value(), this); 1563 LIRItem length(this); 1564 1565 array.load_item(); 1566 index.load_nonconstant(); 1567 1568 if (use_length && needs_range_check) { 1569 length.set_instruction(x->length()); 1570 length.load_item(); 1571 1572 } 1573 if (needs_store_check || x->check_boolean()) { 1574 value.load_item(); 1575 } else { 1576 value.load_for_store(x->elt_type()); 1577 } 1578 1579 set_no_result(x); 1580 1581 // the CodeEmitInfo must be duplicated for each different 1582 // LIR-instruction because spilling can occur anywhere between two 1583 // instructions and so the debug information must be different 1584 CodeEmitInfo* range_check_info = state_for(x); 1585 CodeEmitInfo* null_check_info = NULL; 1586 if (x->needs_null_check()) { 1587 null_check_info = new CodeEmitInfo(range_check_info); 1588 } 1589 1590 if (GenerateRangeChecks && needs_range_check) { 1591 if (use_length) { 1592 __ cmp(lir_cond_belowEqual, length.result(), index.result()); 1593 __ branch(lir_cond_belowEqual, T_INT, new RangeCheckStub(range_check_info, index.result(), array.result())); 1594 } else { 1595 array_range_check(array.result(), index.result(), null_check_info, range_check_info); 1596 // range_check also does the null check 1597 null_check_info = NULL; 1598 } 1599 } 1600 1601 if (GenerateArrayStoreCheck && needs_store_check) { 1602 CodeEmitInfo* store_check_info = new CodeEmitInfo(range_check_info); 1603 array_store_check(value.result(), array.result(), store_check_info, x->profiled_method(), x->profiled_bci()); 1604 } 1605 1606 DecoratorSet decorators = IN_HEAP | IS_ARRAY; 1607 if (x->check_boolean()) { 1608 decorators |= C1_MASK_BOOLEAN; 1609 } 1610 1611 access_store_at(decorators, x->elt_type(), array, index.result(), value.result(), 1612 NULL, null_check_info); 1613 } 1614 1615 void LIRGenerator::access_load_at(DecoratorSet decorators, BasicType type, 1616 LIRItem& base, LIR_Opr offset, LIR_Opr result, 1617 CodeEmitInfo* patch_info, CodeEmitInfo* load_emit_info) { 1618 decorators |= C1_READ_ACCESS; 1619 LIRAccess access(this, decorators, base, offset, type, patch_info, load_emit_info); 1620 if (access.is_raw()) { 1621 _barrier_set->BarrierSetC1::load_at(access, result); 1622 } else { 1623 _barrier_set->load_at(access, result); 1624 } 1625 } 1626 1627 void LIRGenerator::access_load(DecoratorSet decorators, BasicType type, 1628 LIR_Opr addr, LIR_Opr result) { 1629 decorators |= C1_READ_ACCESS; 1630 LIRAccess access(this, decorators, LIR_OprFact::illegalOpr, LIR_OprFact::illegalOpr, type); 1631 access.set_resolved_addr(addr); 1632 if (access.is_raw()) { 1633 _barrier_set->BarrierSetC1::load(access, result); 1634 } else { 1635 _barrier_set->load(access, result); 1636 } 1637 } 1638 1639 void LIRGenerator::access_store_at(DecoratorSet decorators, BasicType type, 1640 LIRItem& base, LIR_Opr offset, LIR_Opr value, 1641 CodeEmitInfo* patch_info, CodeEmitInfo* store_emit_info) { 1642 decorators |= C1_WRITE_ACCESS; 1643 LIRAccess access(this, decorators, base, offset, type, patch_info, store_emit_info); 1644 if (access.is_raw()) { 1645 _barrier_set->BarrierSetC1::store_at(access, value); 1646 } else { 1647 _barrier_set->store_at(access, value); 1648 } 1649 } 1650 1651 LIR_Opr LIRGenerator::access_atomic_cmpxchg_at(DecoratorSet decorators, BasicType type, 1652 LIRItem& base, LIRItem& offset, LIRItem& cmp_value, LIRItem& new_value) { 1653 // Atomic operations are SEQ_CST by default 1654 decorators |= C1_READ_ACCESS; 1655 decorators |= C1_WRITE_ACCESS; 1656 decorators |= ((decorators & MO_DECORATOR_MASK) != 0) ? MO_SEQ_CST : 0; 1657 LIRAccess access(this, decorators, base, offset, type); 1658 if (access.is_raw()) { 1659 return _barrier_set->BarrierSetC1::atomic_cmpxchg_at(access, cmp_value, new_value); 1660 } else { 1661 return _barrier_set->atomic_cmpxchg_at(access, cmp_value, new_value); 1662 } 1663 } 1664 1665 LIR_Opr LIRGenerator::access_atomic_xchg_at(DecoratorSet decorators, BasicType type, 1666 LIRItem& base, LIRItem& offset, LIRItem& value) { 1667 // Atomic operations are SEQ_CST by default 1668 decorators |= C1_READ_ACCESS; 1669 decorators |= C1_WRITE_ACCESS; 1670 decorators |= ((decorators & MO_DECORATOR_MASK) != 0) ? MO_SEQ_CST : 0; 1671 LIRAccess access(this, decorators, base, offset, type); 1672 if (access.is_raw()) { 1673 return _barrier_set->BarrierSetC1::atomic_xchg_at(access, value); 1674 } else { 1675 return _barrier_set->atomic_xchg_at(access, value); 1676 } 1677 } 1678 1679 LIR_Opr LIRGenerator::access_atomic_add_at(DecoratorSet decorators, BasicType type, 1680 LIRItem& base, LIRItem& offset, LIRItem& value) { 1681 // Atomic operations are SEQ_CST by default 1682 decorators |= C1_READ_ACCESS; 1683 decorators |= C1_WRITE_ACCESS; 1684 decorators |= ((decorators & MO_DECORATOR_MASK) != 0) ? MO_SEQ_CST : 0; 1685 LIRAccess access(this, decorators, base, offset, type); 1686 if (access.is_raw()) { 1687 return _barrier_set->BarrierSetC1::atomic_add_at(access, value); 1688 } else { 1689 return _barrier_set->atomic_add_at(access, value); 1690 } 1691 } 1692 1693 void LIRGenerator::do_LoadField(LoadField* x) { 1694 bool needs_patching = x->needs_patching(); 1695 bool is_volatile = x->field()->is_volatile(); 1696 BasicType field_type = x->field_type(); 1697 1698 CodeEmitInfo* info = NULL; 1699 if (needs_patching) { 1700 assert(x->explicit_null_check() == NULL, "can't fold null check into patching field access"); 1701 info = state_for(x, x->state_before()); 1702 } else if (x->needs_null_check()) { 1703 NullCheck* nc = x->explicit_null_check(); 1704 if (nc == NULL) { 1705 info = state_for(x); 1706 } else { 1707 info = state_for(nc); 1708 } 1709 } 1710 1711 LIRItem object(x->obj(), this); 1712 1713 object.load_item(); 1714 1715 #ifndef PRODUCT 1716 if (PrintNotLoaded && needs_patching) { 1717 tty->print_cr(" ###class not loaded at load_%s bci %d", 1718 x->is_static() ? "static" : "field", x->printable_bci()); 1719 } 1720 #endif 1721 1722 bool stress_deopt = StressLoopInvariantCodeMotion && info && info->deoptimize_on_exception(); 1723 if (x->needs_null_check() && 1724 (needs_patching || 1725 MacroAssembler::needs_explicit_null_check(x->offset()) || 1726 stress_deopt)) { 1727 LIR_Opr obj = object.result(); 1728 if (stress_deopt) { 1729 obj = new_register(T_OBJECT); 1730 __ move(LIR_OprFact::oopConst(NULL), obj); 1731 } 1732 // Emit an explicit null check because the offset is too large. 1733 // If the class is not loaded and the object is NULL, we need to deoptimize to throw a 1734 // NoClassDefFoundError in the interpreter instead of an implicit NPE from compiled code. 1735 __ null_check(obj, new CodeEmitInfo(info), /* deoptimize */ needs_patching); 1736 } 1737 1738 DecoratorSet decorators = IN_HEAP; 1739 if (is_volatile) { 1740 decorators |= MO_SEQ_CST; 1741 } 1742 if (needs_patching) { 1743 decorators |= C1_NEEDS_PATCHING; 1744 } 1745 1746 LIR_Opr result = rlock_result(x, field_type); 1747 access_load_at(decorators, field_type, 1748 object, LIR_OprFact::intConst(x->offset()), result, 1749 info ? new CodeEmitInfo(info) : NULL, info); 1750 } 1751 1752 1753 //------------------------java.nio.Buffer.checkIndex------------------------ 1754 1755 // int java.nio.Buffer.checkIndex(int) 1756 void LIRGenerator::do_NIOCheckIndex(Intrinsic* x) { 1757 // NOTE: by the time we are in checkIndex() we are guaranteed that 1758 // the buffer is non-null (because checkIndex is package-private and 1759 // only called from within other methods in the buffer). 1760 assert(x->number_of_arguments() == 2, "wrong type"); 1761 LIRItem buf (x->argument_at(0), this); 1762 LIRItem index(x->argument_at(1), this); 1763 buf.load_item(); 1764 index.load_item(); 1765 1766 LIR_Opr result = rlock_result(x); 1767 if (GenerateRangeChecks) { 1768 CodeEmitInfo* info = state_for(x); 1769 CodeStub* stub = new RangeCheckStub(info, index.result()); 1770 if (index.result()->is_constant()) { 1771 cmp_mem_int(lir_cond_belowEqual, buf.result(), java_nio_Buffer::limit_offset(), index.result()->as_jint(), info); 1772 __ branch(lir_cond_belowEqual, T_INT, stub); 1773 } else { 1774 cmp_reg_mem(lir_cond_aboveEqual, index.result(), buf.result(), 1775 java_nio_Buffer::limit_offset(), T_INT, info); 1776 __ branch(lir_cond_aboveEqual, T_INT, stub); 1777 } 1778 __ move(index.result(), result); 1779 } else { 1780 // Just load the index into the result register 1781 __ move(index.result(), result); 1782 } 1783 } 1784 1785 1786 //------------------------array access-------------------------------------- 1787 1788 1789 void LIRGenerator::do_ArrayLength(ArrayLength* x) { 1790 LIRItem array(x->array(), this); 1791 array.load_item(); 1792 LIR_Opr reg = rlock_result(x); 1793 1794 CodeEmitInfo* info = NULL; 1795 if (x->needs_null_check()) { 1796 NullCheck* nc = x->explicit_null_check(); 1797 if (nc == NULL) { 1798 info = state_for(x); 1799 } else { 1800 info = state_for(nc); 1801 } 1802 if (StressLoopInvariantCodeMotion && info->deoptimize_on_exception()) { 1803 LIR_Opr obj = new_register(T_OBJECT); 1804 __ move(LIR_OprFact::oopConst(NULL), obj); 1805 __ null_check(obj, new CodeEmitInfo(info)); 1806 } 1807 } 1808 __ load(new LIR_Address(array.result(), arrayOopDesc::length_offset_in_bytes(), T_INT), reg, info, lir_patch_none); 1809 } 1810 1811 1812 void LIRGenerator::do_LoadIndexed(LoadIndexed* x) { 1813 bool use_length = x->length() != NULL; 1814 LIRItem array(x->array(), this); 1815 LIRItem index(x->index(), this); 1816 LIRItem length(this); 1817 bool needs_range_check = x->compute_needs_range_check(); 1818 1819 if (use_length && needs_range_check) { 1820 length.set_instruction(x->length()); 1821 length.load_item(); 1822 } 1823 1824 array.load_item(); 1825 if (index.is_constant() && can_inline_as_constant(x->index())) { 1826 // let it be a constant 1827 index.dont_load_item(); 1828 } else { 1829 index.load_item(); 1830 } 1831 1832 CodeEmitInfo* range_check_info = state_for(x); 1833 CodeEmitInfo* null_check_info = NULL; 1834 if (x->needs_null_check()) { 1835 NullCheck* nc = x->explicit_null_check(); 1836 if (nc != NULL) { 1837 null_check_info = state_for(nc); 1838 } else { 1839 null_check_info = range_check_info; 1840 } 1841 if (StressLoopInvariantCodeMotion && null_check_info->deoptimize_on_exception()) { 1842 LIR_Opr obj = new_register(T_OBJECT); 1843 __ move(LIR_OprFact::oopConst(NULL), obj); 1844 __ null_check(obj, new CodeEmitInfo(null_check_info)); 1845 } 1846 } 1847 1848 if (GenerateRangeChecks && needs_range_check) { 1849 if (StressLoopInvariantCodeMotion && range_check_info->deoptimize_on_exception()) { 1850 __ branch(lir_cond_always, T_ILLEGAL, new RangeCheckStub(range_check_info, index.result(), array.result())); 1851 } else if (use_length) { 1852 // TODO: use a (modified) version of array_range_check that does not require a 1853 // constant length to be loaded to a register 1854 __ cmp(lir_cond_belowEqual, length.result(), index.result()); 1855 __ branch(lir_cond_belowEqual, T_INT, new RangeCheckStub(range_check_info, index.result(), array.result())); 1856 } else { 1857 array_range_check(array.result(), index.result(), null_check_info, range_check_info); 1858 // The range check performs the null check, so clear it out for the load 1859 null_check_info = NULL; 1860 } 1861 } 1862 1863 DecoratorSet decorators = IN_HEAP | IS_ARRAY; 1864 1865 LIR_Opr result = rlock_result(x, x->elt_type()); 1866 access_load_at(decorators, x->elt_type(), 1867 array, index.result(), result, 1868 NULL, null_check_info); 1869 } 1870 1871 1872 void LIRGenerator::do_NullCheck(NullCheck* x) { 1873 if (x->can_trap()) { 1874 LIRItem value(x->obj(), this); 1875 value.load_item(); 1876 CodeEmitInfo* info = state_for(x); 1877 __ null_check(value.result(), info); 1878 } 1879 } 1880 1881 1882 void LIRGenerator::do_TypeCast(TypeCast* x) { 1883 LIRItem value(x->obj(), this); 1884 value.load_item(); 1885 // the result is the same as from the node we are casting 1886 set_result(x, value.result()); 1887 } 1888 1889 1890 void LIRGenerator::do_Throw(Throw* x) { 1891 LIRItem exception(x->exception(), this); 1892 exception.load_item(); 1893 set_no_result(x); 1894 LIR_Opr exception_opr = exception.result(); 1895 CodeEmitInfo* info = state_for(x, x->state()); 1896 1897 #ifndef PRODUCT 1898 if (PrintC1Statistics) { 1899 increment_counter(Runtime1::throw_count_address(), T_INT); 1900 } 1901 #endif 1902 1903 // check if the instruction has an xhandler in any of the nested scopes 1904 bool unwind = false; 1905 if (info->exception_handlers()->length() == 0) { 1906 // this throw is not inside an xhandler 1907 unwind = true; 1908 } else { 1909 // get some idea of the throw type 1910 bool type_is_exact = true; 1911 ciType* throw_type = x->exception()->exact_type(); 1912 if (throw_type == NULL) { 1913 type_is_exact = false; 1914 throw_type = x->exception()->declared_type(); 1915 } 1916 if (throw_type != NULL && throw_type->is_instance_klass()) { 1917 ciInstanceKlass* throw_klass = (ciInstanceKlass*)throw_type; 1918 unwind = !x->exception_handlers()->could_catch(throw_klass, type_is_exact); 1919 } 1920 } 1921 1922 // do null check before moving exception oop into fixed register 1923 // to avoid a fixed interval with an oop during the null check. 1924 // Use a copy of the CodeEmitInfo because debug information is 1925 // different for null_check and throw. 1926 if (x->exception()->as_NewInstance() == NULL && x->exception()->as_ExceptionObject() == NULL) { 1927 // if the exception object wasn't created using new then it might be null. 1928 __ null_check(exception_opr, new CodeEmitInfo(info, x->state()->copy(ValueStack::ExceptionState, x->state()->bci()))); 1929 } 1930 1931 if (compilation()->env()->jvmti_can_post_on_exceptions()) { 1932 // we need to go through the exception lookup path to get JVMTI 1933 // notification done 1934 unwind = false; 1935 } 1936 1937 // move exception oop into fixed register 1938 __ move(exception_opr, exceptionOopOpr()); 1939 1940 if (unwind) { 1941 __ unwind_exception(exceptionOopOpr()); 1942 } else { 1943 __ throw_exception(exceptionPcOpr(), exceptionOopOpr(), info); 1944 } 1945 } 1946 1947 1948 void LIRGenerator::do_RoundFP(RoundFP* x) { 1949 LIRItem input(x->input(), this); 1950 input.load_item(); 1951 LIR_Opr input_opr = input.result(); 1952 assert(input_opr->is_register(), "why round if value is not in a register?"); 1953 assert(input_opr->is_single_fpu() || input_opr->is_double_fpu(), "input should be floating-point value"); 1954 if (input_opr->is_single_fpu()) { 1955 set_result(x, round_item(input_opr)); // This code path not currently taken 1956 } else { 1957 LIR_Opr result = new_register(T_DOUBLE); 1958 set_vreg_flag(result, must_start_in_memory); 1959 __ roundfp(input_opr, LIR_OprFact::illegalOpr, result); 1960 set_result(x, result); 1961 } 1962 } 1963 1964 // Here UnsafeGetRaw may have x->base() and x->index() be int or long 1965 // on both 64 and 32 bits. Expecting x->base() to be always long on 64bit. 1966 void LIRGenerator::do_UnsafeGetRaw(UnsafeGetRaw* x) { 1967 LIRItem base(x->base(), this); 1968 LIRItem idx(this); 1969 1970 base.load_item(); 1971 if (x->has_index()) { 1972 idx.set_instruction(x->index()); 1973 idx.load_nonconstant(); 1974 } 1975 1976 LIR_Opr reg = rlock_result(x, x->basic_type()); 1977 1978 int log2_scale = 0; 1979 if (x->has_index()) { 1980 log2_scale = x->log2_scale(); 1981 } 1982 1983 assert(!x->has_index() || idx.value() == x->index(), "should match"); 1984 1985 LIR_Opr base_op = base.result(); 1986 LIR_Opr index_op = idx.result(); 1987 #ifndef _LP64 1988 if (base_op->type() == T_LONG) { 1989 base_op = new_register(T_INT); 1990 __ convert(Bytecodes::_l2i, base.result(), base_op); 1991 } 1992 if (x->has_index()) { 1993 if (index_op->type() == T_LONG) { 1994 LIR_Opr long_index_op = index_op; 1995 if (index_op->is_constant()) { 1996 long_index_op = new_register(T_LONG); 1997 __ move(index_op, long_index_op); 1998 } 1999 index_op = new_register(T_INT); 2000 __ convert(Bytecodes::_l2i, long_index_op, index_op); 2001 } else { 2002 assert(x->index()->type()->tag() == intTag, "must be"); 2003 } 2004 } 2005 // At this point base and index should be all ints. 2006 assert(base_op->type() == T_INT && !base_op->is_constant(), "base should be an non-constant int"); 2007 assert(!x->has_index() || index_op->type() == T_INT, "index should be an int"); 2008 #else 2009 if (x->has_index()) { 2010 if (index_op->type() == T_INT) { 2011 if (!index_op->is_constant()) { 2012 index_op = new_register(T_LONG); 2013 __ convert(Bytecodes::_i2l, idx.result(), index_op); 2014 } 2015 } else { 2016 assert(index_op->type() == T_LONG, "must be"); 2017 if (index_op->is_constant()) { 2018 index_op = new_register(T_LONG); 2019 __ move(idx.result(), index_op); 2020 } 2021 } 2022 } 2023 // At this point base is a long non-constant 2024 // Index is a long register or a int constant. 2025 // We allow the constant to stay an int because that would allow us a more compact encoding by 2026 // embedding an immediate offset in the address expression. If we have a long constant, we have to 2027 // move it into a register first. 2028 assert(base_op->type() == T_LONG && !base_op->is_constant(), "base must be a long non-constant"); 2029 assert(!x->has_index() || (index_op->type() == T_INT && index_op->is_constant()) || 2030 (index_op->type() == T_LONG && !index_op->is_constant()), "unexpected index type"); 2031 #endif 2032 2033 BasicType dst_type = x->basic_type(); 2034 2035 LIR_Address* addr; 2036 if (index_op->is_constant()) { 2037 assert(log2_scale == 0, "must not have a scale"); 2038 assert(index_op->type() == T_INT, "only int constants supported"); 2039 addr = new LIR_Address(base_op, index_op->as_jint(), dst_type); 2040 } else { 2041 #ifdef X86 2042 addr = new LIR_Address(base_op, index_op, LIR_Address::Scale(log2_scale), 0, dst_type); 2043 #elif defined(GENERATE_ADDRESS_IS_PREFERRED) 2044 addr = generate_address(base_op, index_op, log2_scale, 0, dst_type); 2045 #else 2046 if (index_op->is_illegal() || log2_scale == 0) { 2047 addr = new LIR_Address(base_op, index_op, dst_type); 2048 } else { 2049 LIR_Opr tmp = new_pointer_register(); 2050 __ shift_left(index_op, log2_scale, tmp); 2051 addr = new LIR_Address(base_op, tmp, dst_type); 2052 } 2053 #endif 2054 } 2055 2056 if (x->may_be_unaligned() && (dst_type == T_LONG || dst_type == T_DOUBLE)) { 2057 __ unaligned_move(addr, reg); 2058 } else { 2059 if (dst_type == T_OBJECT && x->is_wide()) { 2060 __ move_wide(addr, reg); 2061 } else { 2062 __ move(addr, reg); 2063 } 2064 } 2065 } 2066 2067 2068 void LIRGenerator::do_UnsafePutRaw(UnsafePutRaw* x) { 2069 int log2_scale = 0; 2070 BasicType type = x->basic_type(); 2071 2072 if (x->has_index()) { 2073 log2_scale = x->log2_scale(); 2074 } 2075 2076 LIRItem base(x->base(), this); 2077 LIRItem value(x->value(), this); 2078 LIRItem idx(this); 2079 2080 base.load_item(); 2081 if (x->has_index()) { 2082 idx.set_instruction(x->index()); 2083 idx.load_item(); 2084 } 2085 2086 if (type == T_BYTE || type == T_BOOLEAN) { 2087 value.load_byte_item(); 2088 } else { 2089 value.load_item(); 2090 } 2091 2092 set_no_result(x); 2093 2094 LIR_Opr base_op = base.result(); 2095 LIR_Opr index_op = idx.result(); 2096 2097 #ifdef GENERATE_ADDRESS_IS_PREFERRED 2098 LIR_Address* addr = generate_address(base_op, index_op, log2_scale, 0, x->basic_type()); 2099 #else 2100 #ifndef _LP64 2101 if (base_op->type() == T_LONG) { 2102 base_op = new_register(T_INT); 2103 __ convert(Bytecodes::_l2i, base.result(), base_op); 2104 } 2105 if (x->has_index()) { 2106 if (index_op->type() == T_LONG) { 2107 index_op = new_register(T_INT); 2108 __ convert(Bytecodes::_l2i, idx.result(), index_op); 2109 } 2110 } 2111 // At this point base and index should be all ints and not constants 2112 assert(base_op->type() == T_INT && !base_op->is_constant(), "base should be an non-constant int"); 2113 assert(!x->has_index() || (index_op->type() == T_INT && !index_op->is_constant()), "index should be an non-constant int"); 2114 #else 2115 if (x->has_index()) { 2116 if (index_op->type() == T_INT) { 2117 index_op = new_register(T_LONG); 2118 __ convert(Bytecodes::_i2l, idx.result(), index_op); 2119 } 2120 } 2121 // At this point base and index are long and non-constant 2122 assert(base_op->type() == T_LONG && !base_op->is_constant(), "base must be a non-constant long"); 2123 assert(!x->has_index() || (index_op->type() == T_LONG && !index_op->is_constant()), "index must be a non-constant long"); 2124 #endif 2125 2126 if (log2_scale != 0) { 2127 // temporary fix (platform dependent code without shift on Intel would be better) 2128 // TODO: ARM also allows embedded shift in the address 2129 LIR_Opr tmp = new_pointer_register(); 2130 if (TwoOperandLIRForm) { 2131 __ move(index_op, tmp); 2132 index_op = tmp; 2133 } 2134 __ shift_left(index_op, log2_scale, tmp); 2135 if (!TwoOperandLIRForm) { 2136 index_op = tmp; 2137 } 2138 } 2139 2140 LIR_Address* addr = new LIR_Address(base_op, index_op, x->basic_type()); 2141 #endif // !GENERATE_ADDRESS_IS_PREFERRED 2142 __ move(value.result(), addr); 2143 } 2144 2145 2146 void LIRGenerator::do_UnsafeGetObject(UnsafeGetObject* x) { 2147 BasicType type = x->basic_type(); 2148 LIRItem src(x->object(), this); 2149 LIRItem off(x->offset(), this); 2150 2151 off.load_item(); 2152 src.load_item(); 2153 2154 DecoratorSet decorators = IN_HEAP; 2155 2156 if (x->is_volatile()) { 2157 decorators |= MO_SEQ_CST; 2158 } 2159 if (type == T_BOOLEAN) { 2160 decorators |= C1_MASK_BOOLEAN; 2161 } 2162 if (type == T_ARRAY || type == T_OBJECT) { 2163 decorators |= ON_UNKNOWN_OOP_REF; 2164 } 2165 2166 LIR_Opr result = rlock_result(x, type); 2167 access_load_at(decorators, type, 2168 src, off.result(), result); 2169 } 2170 2171 2172 void LIRGenerator::do_UnsafePutObject(UnsafePutObject* x) { 2173 BasicType type = x->basic_type(); 2174 LIRItem src(x->object(), this); 2175 LIRItem off(x->offset(), this); 2176 LIRItem data(x->value(), this); 2177 2178 src.load_item(); 2179 if (type == T_BOOLEAN || type == T_BYTE) { 2180 data.load_byte_item(); 2181 } else { 2182 data.load_item(); 2183 } 2184 off.load_item(); 2185 2186 set_no_result(x); 2187 2188 DecoratorSet decorators = IN_HEAP; 2189 if (type == T_ARRAY || type == T_OBJECT) { 2190 decorators |= ON_UNKNOWN_OOP_REF; 2191 } 2192 if (x->is_volatile()) { 2193 decorators |= MO_SEQ_CST; 2194 } 2195 access_store_at(decorators, type, src, off.result(), data.result()); 2196 } 2197 2198 void LIRGenerator::do_UnsafeGetAndSetObject(UnsafeGetAndSetObject* x) { 2199 BasicType type = x->basic_type(); 2200 LIRItem src(x->object(), this); 2201 LIRItem off(x->offset(), this); 2202 LIRItem value(x->value(), this); 2203 2204 DecoratorSet decorators = IN_HEAP | MO_SEQ_CST; 2205 2206 if (type == T_ARRAY || type == T_OBJECT) { 2207 decorators |= ON_UNKNOWN_OOP_REF; 2208 } 2209 2210 LIR_Opr result; 2211 if (x->is_add()) { 2212 result = access_atomic_add_at(decorators, type, src, off, value); 2213 } else { 2214 result = access_atomic_xchg_at(decorators, type, src, off, value); 2215 } 2216 set_result(x, result); 2217 } 2218 2219 void LIRGenerator::do_SwitchRanges(SwitchRangeArray* x, LIR_Opr value, BlockBegin* default_sux) { 2220 int lng = x->length(); 2221 2222 for (int i = 0; i < lng; i++) { 2223 SwitchRange* one_range = x->at(i); 2224 int low_key = one_range->low_key(); 2225 int high_key = one_range->high_key(); 2226 BlockBegin* dest = one_range->sux(); 2227 if (low_key == high_key) { 2228 __ cmp(lir_cond_equal, value, low_key); 2229 __ branch(lir_cond_equal, T_INT, dest); 2230 } else if (high_key - low_key == 1) { 2231 __ cmp(lir_cond_equal, value, low_key); 2232 __ branch(lir_cond_equal, T_INT, dest); 2233 __ cmp(lir_cond_equal, value, high_key); 2234 __ branch(lir_cond_equal, T_INT, dest); 2235 } else { 2236 LabelObj* L = new LabelObj(); 2237 __ cmp(lir_cond_less, value, low_key); 2238 __ branch(lir_cond_less, T_INT, L->label()); 2239 __ cmp(lir_cond_lessEqual, value, high_key); 2240 __ branch(lir_cond_lessEqual, T_INT, dest); 2241 __ branch_destination(L->label()); 2242 } 2243 } 2244 __ jump(default_sux); 2245 } 2246 2247 2248 SwitchRangeArray* LIRGenerator::create_lookup_ranges(TableSwitch* x) { 2249 SwitchRangeList* res = new SwitchRangeList(); 2250 int len = x->length(); 2251 if (len > 0) { 2252 BlockBegin* sux = x->sux_at(0); 2253 int key = x->lo_key(); 2254 BlockBegin* default_sux = x->default_sux(); 2255 SwitchRange* range = new SwitchRange(key, sux); 2256 for (int i = 0; i < len; i++, key++) { 2257 BlockBegin* new_sux = x->sux_at(i); 2258 if (sux == new_sux) { 2259 // still in same range 2260 range->set_high_key(key); 2261 } else { 2262 // skip tests which explicitly dispatch to the default 2263 if (sux != default_sux) { 2264 res->append(range); 2265 } 2266 range = new SwitchRange(key, new_sux); 2267 } 2268 sux = new_sux; 2269 } 2270 if (res->length() == 0 || res->last() != range) res->append(range); 2271 } 2272 return res; 2273 } 2274 2275 2276 // we expect the keys to be sorted by increasing value 2277 SwitchRangeArray* LIRGenerator::create_lookup_ranges(LookupSwitch* x) { 2278 SwitchRangeList* res = new SwitchRangeList(); 2279 int len = x->length(); 2280 if (len > 0) { 2281 BlockBegin* default_sux = x->default_sux(); 2282 int key = x->key_at(0); 2283 BlockBegin* sux = x->sux_at(0); 2284 SwitchRange* range = new SwitchRange(key, sux); 2285 for (int i = 1; i < len; i++) { 2286 int new_key = x->key_at(i); 2287 BlockBegin* new_sux = x->sux_at(i); 2288 if (key+1 == new_key && sux == new_sux) { 2289 // still in same range 2290 range->set_high_key(new_key); 2291 } else { 2292 // skip tests which explicitly dispatch to the default 2293 if (range->sux() != default_sux) { 2294 res->append(range); 2295 } 2296 range = new SwitchRange(new_key, new_sux); 2297 } 2298 key = new_key; 2299 sux = new_sux; 2300 } 2301 if (res->length() == 0 || res->last() != range) res->append(range); 2302 } 2303 return res; 2304 } 2305 2306 2307 void LIRGenerator::do_TableSwitch(TableSwitch* x) { 2308 LIRItem tag(x->tag(), this); 2309 tag.load_item(); 2310 set_no_result(x); 2311 2312 if (x->is_safepoint()) { 2313 __ safepoint(safepoint_poll_register(), state_for(x, x->state_before())); 2314 } 2315 2316 // move values into phi locations 2317 move_to_phi(x->state()); 2318 2319 int lo_key = x->lo_key(); 2320 int len = x->length(); 2321 assert(lo_key <= (lo_key + (len - 1)), "integer overflow"); 2322 LIR_Opr value = tag.result(); 2323 2324 if (compilation()->env()->comp_level() == CompLevel_full_profile && UseSwitchProfiling) { 2325 ciMethod* method = x->state()->scope()->method(); 2326 ciMethodData* md = method->method_data_or_null(); 2327 assert(md != NULL, "Sanity"); 2328 ciProfileData* data = md->bci_to_data(x->state()->bci()); 2329 assert(data != NULL, "must have profiling data"); 2330 assert(data->is_MultiBranchData(), "bad profile data?"); 2331 int default_count_offset = md->byte_offset_of_slot(data, MultiBranchData::default_count_offset()); 2332 LIR_Opr md_reg = new_register(T_METADATA); 2333 __ metadata2reg(md->constant_encoding(), md_reg); 2334 LIR_Opr data_offset_reg = new_pointer_register(); 2335 LIR_Opr tmp_reg = new_pointer_register(); 2336 2337 __ move(LIR_OprFact::intptrConst(default_count_offset), data_offset_reg); 2338 for (int i = 0; i < len; i++) { 2339 int count_offset = md->byte_offset_of_slot(data, MultiBranchData::case_count_offset(i)); 2340 __ cmp(lir_cond_equal, value, i + lo_key); 2341 __ move(data_offset_reg, tmp_reg); 2342 __ cmove(lir_cond_equal, 2343 LIR_OprFact::intptrConst(count_offset), 2344 tmp_reg, 2345 data_offset_reg, T_INT); 2346 } 2347 2348 LIR_Opr data_reg = new_pointer_register(); 2349 LIR_Address* data_addr = new LIR_Address(md_reg, data_offset_reg, data_reg->type()); 2350 __ move(data_addr, data_reg); 2351 __ add(data_reg, LIR_OprFact::intptrConst(1), data_reg); 2352 __ move(data_reg, data_addr); 2353 } 2354 2355 if (UseTableRanges) { 2356 do_SwitchRanges(create_lookup_ranges(x), value, x->default_sux()); 2357 } else { 2358 for (int i = 0; i < len; i++) { 2359 __ cmp(lir_cond_equal, value, i + lo_key); 2360 __ branch(lir_cond_equal, T_INT, x->sux_at(i)); 2361 } 2362 __ jump(x->default_sux()); 2363 } 2364 } 2365 2366 2367 void LIRGenerator::do_LookupSwitch(LookupSwitch* x) { 2368 LIRItem tag(x->tag(), this); 2369 tag.load_item(); 2370 set_no_result(x); 2371 2372 if (x->is_safepoint()) { 2373 __ safepoint(safepoint_poll_register(), state_for(x, x->state_before())); 2374 } 2375 2376 // move values into phi locations 2377 move_to_phi(x->state()); 2378 2379 LIR_Opr value = tag.result(); 2380 int len = x->length(); 2381 2382 if (compilation()->env()->comp_level() == CompLevel_full_profile && UseSwitchProfiling) { 2383 ciMethod* method = x->state()->scope()->method(); 2384 ciMethodData* md = method->method_data_or_null(); 2385 assert(md != NULL, "Sanity"); 2386 ciProfileData* data = md->bci_to_data(x->state()->bci()); 2387 assert(data != NULL, "must have profiling data"); 2388 assert(data->is_MultiBranchData(), "bad profile data?"); 2389 int default_count_offset = md->byte_offset_of_slot(data, MultiBranchData::default_count_offset()); 2390 LIR_Opr md_reg = new_register(T_METADATA); 2391 __ metadata2reg(md->constant_encoding(), md_reg); 2392 LIR_Opr data_offset_reg = new_pointer_register(); 2393 LIR_Opr tmp_reg = new_pointer_register(); 2394 2395 __ move(LIR_OprFact::intptrConst(default_count_offset), data_offset_reg); 2396 for (int i = 0; i < len; i++) { 2397 int count_offset = md->byte_offset_of_slot(data, MultiBranchData::case_count_offset(i)); 2398 __ cmp(lir_cond_equal, value, x->key_at(i)); 2399 __ move(data_offset_reg, tmp_reg); 2400 __ cmove(lir_cond_equal, 2401 LIR_OprFact::intptrConst(count_offset), 2402 tmp_reg, 2403 data_offset_reg, T_INT); 2404 } 2405 2406 LIR_Opr data_reg = new_pointer_register(); 2407 LIR_Address* data_addr = new LIR_Address(md_reg, data_offset_reg, data_reg->type()); 2408 __ move(data_addr, data_reg); 2409 __ add(data_reg, LIR_OprFact::intptrConst(1), data_reg); 2410 __ move(data_reg, data_addr); 2411 } 2412 2413 if (UseTableRanges) { 2414 do_SwitchRanges(create_lookup_ranges(x), value, x->default_sux()); 2415 } else { 2416 int len = x->length(); 2417 for (int i = 0; i < len; i++) { 2418 __ cmp(lir_cond_equal, value, x->key_at(i)); 2419 __ branch(lir_cond_equal, T_INT, x->sux_at(i)); 2420 } 2421 __ jump(x->default_sux()); 2422 } 2423 } 2424 2425 2426 void LIRGenerator::do_Goto(Goto* x) { 2427 set_no_result(x); 2428 2429 if (block()->next()->as_OsrEntry()) { 2430 // need to free up storage used for OSR entry point 2431 LIR_Opr osrBuffer = block()->next()->operand(); 2432 BasicTypeList signature; 2433 signature.append(NOT_LP64(T_INT) LP64_ONLY(T_LONG)); // pass a pointer to osrBuffer 2434 CallingConvention* cc = frame_map()->c_calling_convention(&signature); 2435 __ move(osrBuffer, cc->args()->at(0)); 2436 __ call_runtime_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::OSR_migration_end), 2437 getThreadTemp(), LIR_OprFact::illegalOpr, cc->args()); 2438 } 2439 2440 if (x->is_safepoint()) { 2441 ValueStack* state = x->state_before() ? x->state_before() : x->state(); 2442 2443 // increment backedge counter if needed 2444 CodeEmitInfo* info = state_for(x, state); 2445 increment_backedge_counter(info, x->profiled_bci()); 2446 CodeEmitInfo* safepoint_info = state_for(x, state); 2447 __ safepoint(safepoint_poll_register(), safepoint_info); 2448 } 2449 2450 // Gotos can be folded Ifs, handle this case. 2451 if (x->should_profile()) { 2452 ciMethod* method = x->profiled_method(); 2453 assert(method != NULL, "method should be set if branch is profiled"); 2454 ciMethodData* md = method->method_data_or_null(); 2455 assert(md != NULL, "Sanity"); 2456 ciProfileData* data = md->bci_to_data(x->profiled_bci()); 2457 assert(data != NULL, "must have profiling data"); 2458 int offset; 2459 if (x->direction() == Goto::taken) { 2460 assert(data->is_BranchData(), "need BranchData for two-way branches"); 2461 offset = md->byte_offset_of_slot(data, BranchData::taken_offset()); 2462 } else if (x->direction() == Goto::not_taken) { 2463 assert(data->is_BranchData(), "need BranchData for two-way branches"); 2464 offset = md->byte_offset_of_slot(data, BranchData::not_taken_offset()); 2465 } else { 2466 assert(data->is_JumpData(), "need JumpData for branches"); 2467 offset = md->byte_offset_of_slot(data, JumpData::taken_offset()); 2468 } 2469 LIR_Opr md_reg = new_register(T_METADATA); 2470 __ metadata2reg(md->constant_encoding(), md_reg); 2471 2472 increment_counter(new LIR_Address(md_reg, offset, 2473 NOT_LP64(T_INT) LP64_ONLY(T_LONG)), DataLayout::counter_increment); 2474 } 2475 2476 // emit phi-instruction move after safepoint since this simplifies 2477 // describing the state as the safepoint. 2478 move_to_phi(x->state()); 2479 2480 __ jump(x->default_sux()); 2481 } 2482 2483 /** 2484 * Emit profiling code if needed for arguments, parameters, return value types 2485 * 2486 * @param md MDO the code will update at runtime 2487 * @param md_base_offset common offset in the MDO for this profile and subsequent ones 2488 * @param md_offset offset in the MDO (on top of md_base_offset) for this profile 2489 * @param profiled_k current profile 2490 * @param obj IR node for the object to be profiled 2491 * @param mdp register to hold the pointer inside the MDO (md + md_base_offset). 2492 * Set once we find an update to make and use for next ones. 2493 * @param not_null true if we know obj cannot be null 2494 * @param signature_at_call_k signature at call for obj 2495 * @param callee_signature_k signature of callee for obj 2496 * at call and callee signatures differ at method handle call 2497 * @return the only klass we know will ever be seen at this profile point 2498 */ 2499 ciKlass* LIRGenerator::profile_type(ciMethodData* md, int md_base_offset, int md_offset, intptr_t profiled_k, 2500 Value obj, LIR_Opr& mdp, bool not_null, ciKlass* signature_at_call_k, 2501 ciKlass* callee_signature_k) { 2502 ciKlass* result = NULL; 2503 bool do_null = !not_null && !TypeEntries::was_null_seen(profiled_k); 2504 bool do_update = !TypeEntries::is_type_unknown(profiled_k); 2505 // known not to be null or null bit already set and already set to 2506 // unknown: nothing we can do to improve profiling 2507 if (!do_null && !do_update) { 2508 return result; 2509 } 2510 2511 ciKlass* exact_klass = NULL; 2512 Compilation* comp = Compilation::current(); 2513 if (do_update) { 2514 // try to find exact type, using CHA if possible, so that loading 2515 // the klass from the object can be avoided 2516 ciType* type = obj->exact_type(); 2517 if (type == NULL) { 2518 type = obj->declared_type(); 2519 type = comp->cha_exact_type(type); 2520 } 2521 assert(type == NULL || type->is_klass(), "type should be class"); 2522 exact_klass = (type != NULL && type->is_loaded()) ? (ciKlass*)type : NULL; 2523 2524 do_update = exact_klass == NULL || ciTypeEntries::valid_ciklass(profiled_k) != exact_klass; 2525 } 2526 2527 if (!do_null && !do_update) { 2528 return result; 2529 } 2530 2531 ciKlass* exact_signature_k = NULL; 2532 if (do_update) { 2533 // Is the type from the signature exact (the only one possible)? 2534 exact_signature_k = signature_at_call_k->exact_klass(); 2535 if (exact_signature_k == NULL) { 2536 exact_signature_k = comp->cha_exact_type(signature_at_call_k); 2537 } else { 2538 result = exact_signature_k; 2539 // Known statically. No need to emit any code: prevent 2540 // LIR_Assembler::emit_profile_type() from emitting useless code 2541 profiled_k = ciTypeEntries::with_status(result, profiled_k); 2542 } 2543 // exact_klass and exact_signature_k can be both non NULL but 2544 // different if exact_klass is loaded after the ciObject for 2545 // exact_signature_k is created. 2546 if (exact_klass == NULL && exact_signature_k != NULL && exact_klass != exact_signature_k) { 2547 // sometimes the type of the signature is better than the best type 2548 // the compiler has 2549 exact_klass = exact_signature_k; 2550 } 2551 if (callee_signature_k != NULL && 2552 callee_signature_k != signature_at_call_k) { 2553 ciKlass* improved_klass = callee_signature_k->exact_klass(); 2554 if (improved_klass == NULL) { 2555 improved_klass = comp->cha_exact_type(callee_signature_k); 2556 } 2557 if (exact_klass == NULL && improved_klass != NULL && exact_klass != improved_klass) { 2558 exact_klass = exact_signature_k; 2559 } 2560 } 2561 do_update = exact_klass == NULL || ciTypeEntries::valid_ciklass(profiled_k) != exact_klass; 2562 } 2563 2564 if (!do_null && !do_update) { 2565 return result; 2566 } 2567 2568 if (mdp == LIR_OprFact::illegalOpr) { 2569 mdp = new_register(T_METADATA); 2570 __ metadata2reg(md->constant_encoding(), mdp); 2571 if (md_base_offset != 0) { 2572 LIR_Address* base_type_address = new LIR_Address(mdp, md_base_offset, T_ADDRESS); 2573 mdp = new_pointer_register(); 2574 __ leal(LIR_OprFact::address(base_type_address), mdp); 2575 } 2576 } 2577 LIRItem value(obj, this); 2578 value.load_item(); 2579 __ profile_type(new LIR_Address(mdp, md_offset, T_METADATA), 2580 value.result(), exact_klass, profiled_k, new_pointer_register(), not_null, exact_signature_k != NULL); 2581 return result; 2582 } 2583 2584 // profile parameters on entry to the root of the compilation 2585 void LIRGenerator::profile_parameters(Base* x) { 2586 if (compilation()->profile_parameters()) { 2587 CallingConvention* args = compilation()->frame_map()->incoming_arguments(); 2588 ciMethodData* md = scope()->method()->method_data_or_null(); 2589 assert(md != NULL, "Sanity"); 2590 2591 if (md->parameters_type_data() != NULL) { 2592 ciParametersTypeData* parameters_type_data = md->parameters_type_data(); 2593 ciTypeStackSlotEntries* parameters = parameters_type_data->parameters(); 2594 LIR_Opr mdp = LIR_OprFact::illegalOpr; 2595 for (int java_index = 0, i = 0, j = 0; j < parameters_type_data->number_of_parameters(); i++) { 2596 LIR_Opr src = args->at(i); 2597 assert(!src->is_illegal(), "check"); 2598 BasicType t = src->type(); 2599 if (t == T_OBJECT || t == T_ARRAY) { 2600 intptr_t profiled_k = parameters->type(j); 2601 Local* local = x->state()->local_at(java_index)->as_Local(); 2602 ciKlass* exact = profile_type(md, md->byte_offset_of_slot(parameters_type_data, ParametersTypeData::type_offset(0)), 2603 in_bytes(ParametersTypeData::type_offset(j)) - in_bytes(ParametersTypeData::type_offset(0)), 2604 profiled_k, local, mdp, false, local->declared_type()->as_klass(), NULL); 2605 // If the profile is known statically set it once for all and do not emit any code 2606 if (exact != NULL) { 2607 md->set_parameter_type(j, exact); 2608 } 2609 j++; 2610 } 2611 java_index += type2size[t]; 2612 } 2613 } 2614 } 2615 } 2616 2617 void LIRGenerator::do_Base(Base* x) { 2618 __ std_entry(LIR_OprFact::illegalOpr); 2619 // Emit moves from physical registers / stack slots to virtual registers 2620 CallingConvention* args = compilation()->frame_map()->incoming_arguments(); 2621 IRScope* irScope = compilation()->hir()->top_scope(); 2622 int java_index = 0; 2623 for (int i = 0; i < args->length(); i++) { 2624 LIR_Opr src = args->at(i); 2625 assert(!src->is_illegal(), "check"); 2626 BasicType t = src->type(); 2627 2628 // Types which are smaller than int are passed as int, so 2629 // correct the type which passed. 2630 switch (t) { 2631 case T_BYTE: 2632 case T_BOOLEAN: 2633 case T_SHORT: 2634 case T_CHAR: 2635 t = T_INT; 2636 break; 2637 default: 2638 break; 2639 } 2640 2641 LIR_Opr dest = new_register(t); 2642 __ move(src, dest); 2643 2644 // Assign new location to Local instruction for this local 2645 Local* local = x->state()->local_at(java_index)->as_Local(); 2646 assert(local != NULL, "Locals for incoming arguments must have been created"); 2647 #ifndef __SOFTFP__ 2648 // The java calling convention passes double as long and float as int. 2649 assert(as_ValueType(t)->tag() == local->type()->tag(), "check"); 2650 #endif // __SOFTFP__ 2651 local->set_operand(dest); 2652 _instruction_for_operand.at_put_grow(dest->vreg_number(), local, NULL); 2653 java_index += type2size[t]; 2654 } 2655 2656 if (compilation()->env()->dtrace_method_probes()) { 2657 BasicTypeList signature; 2658 signature.append(LP64_ONLY(T_LONG) NOT_LP64(T_INT)); // thread 2659 signature.append(T_METADATA); // Method* 2660 LIR_OprList* args = new LIR_OprList(); 2661 args->append(getThreadPointer()); 2662 LIR_Opr meth = new_register(T_METADATA); 2663 __ metadata2reg(method()->constant_encoding(), meth); 2664 args->append(meth); 2665 call_runtime(&signature, args, CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_entry), voidType, NULL); 2666 } 2667 2668 if (method()->is_synchronized()) { 2669 LIR_Opr obj; 2670 if (method()->is_static()) { 2671 obj = new_register(T_OBJECT); 2672 __ oop2reg(method()->holder()->java_mirror()->constant_encoding(), obj); 2673 } else { 2674 Local* receiver = x->state()->local_at(0)->as_Local(); 2675 assert(receiver != NULL, "must already exist"); 2676 obj = receiver->operand(); 2677 } 2678 assert(obj->is_valid(), "must be valid"); 2679 2680 if (method()->is_synchronized() && GenerateSynchronizationCode) { 2681 LIR_Opr lock = syncLockOpr(); 2682 __ load_stack_address_monitor(0, lock); 2683 2684 CodeEmitInfo* info = new CodeEmitInfo(scope()->start()->state()->copy(ValueStack::StateBefore, SynchronizationEntryBCI), NULL, x->check_flag(Instruction::DeoptimizeOnException)); 2685 CodeStub* slow_path = new MonitorEnterStub(obj, lock, info); 2686 2687 // receiver is guaranteed non-NULL so don't need CodeEmitInfo 2688 __ lock_object(syncTempOpr(), obj, lock, new_register(T_OBJECT), slow_path, NULL); 2689 } 2690 } 2691 if (compilation()->age_code()) { 2692 CodeEmitInfo* info = new CodeEmitInfo(scope()->start()->state()->copy(ValueStack::StateBefore, 0), NULL, false); 2693 decrement_age(info); 2694 } 2695 // increment invocation counters if needed 2696 if (!method()->is_accessor()) { // Accessors do not have MDOs, so no counting. 2697 profile_parameters(x); 2698 CodeEmitInfo* info = new CodeEmitInfo(scope()->start()->state()->copy(ValueStack::StateBefore, SynchronizationEntryBCI), NULL, false); 2699 increment_invocation_counter(info); 2700 } 2701 2702 // all blocks with a successor must end with an unconditional jump 2703 // to the successor even if they are consecutive 2704 __ jump(x->default_sux()); 2705 } 2706 2707 2708 void LIRGenerator::do_OsrEntry(OsrEntry* x) { 2709 // construct our frame and model the production of incoming pointer 2710 // to the OSR buffer. 2711 __ osr_entry(LIR_Assembler::osrBufferPointer()); 2712 LIR_Opr result = rlock_result(x); 2713 __ move(LIR_Assembler::osrBufferPointer(), result); 2714 } 2715 2716 2717 void LIRGenerator::invoke_load_arguments(Invoke* x, LIRItemList* args, const LIR_OprList* arg_list) { 2718 assert(args->length() == arg_list->length(), 2719 "args=%d, arg_list=%d", args->length(), arg_list->length()); 2720 for (int i = x->has_receiver() ? 1 : 0; i < args->length(); i++) { 2721 LIRItem* param = args->at(i); 2722 LIR_Opr loc = arg_list->at(i); 2723 if (loc->is_register()) { 2724 param->load_item_force(loc); 2725 } else { 2726 LIR_Address* addr = loc->as_address_ptr(); 2727 param->load_for_store(addr->type()); 2728 if (addr->type() == T_OBJECT) { 2729 __ move_wide(param->result(), addr); 2730 } else 2731 if (addr->type() == T_LONG || addr->type() == T_DOUBLE) { 2732 __ unaligned_move(param->result(), addr); 2733 } else { 2734 __ move(param->result(), addr); 2735 } 2736 } 2737 } 2738 2739 if (x->has_receiver()) { 2740 LIRItem* receiver = args->at(0); 2741 LIR_Opr loc = arg_list->at(0); 2742 if (loc->is_register()) { 2743 receiver->load_item_force(loc); 2744 } else { 2745 assert(loc->is_address(), "just checking"); 2746 receiver->load_for_store(T_OBJECT); 2747 __ move_wide(receiver->result(), loc->as_address_ptr()); 2748 } 2749 } 2750 } 2751 2752 2753 // Visits all arguments, returns appropriate items without loading them 2754 LIRItemList* LIRGenerator::invoke_visit_arguments(Invoke* x) { 2755 LIRItemList* argument_items = new LIRItemList(); 2756 if (x->has_receiver()) { 2757 LIRItem* receiver = new LIRItem(x->receiver(), this); 2758 argument_items->append(receiver); 2759 } 2760 for (int i = 0; i < x->number_of_arguments(); i++) { 2761 LIRItem* param = new LIRItem(x->argument_at(i), this); 2762 argument_items->append(param); 2763 } 2764 return argument_items; 2765 } 2766 2767 2768 // The invoke with receiver has following phases: 2769 // a) traverse and load/lock receiver; 2770 // b) traverse all arguments -> item-array (invoke_visit_argument) 2771 // c) push receiver on stack 2772 // d) load each of the items and push on stack 2773 // e) unlock receiver 2774 // f) move receiver into receiver-register %o0 2775 // g) lock result registers and emit call operation 2776 // 2777 // Before issuing a call, we must spill-save all values on stack 2778 // that are in caller-save register. "spill-save" moves those registers 2779 // either in a free callee-save register or spills them if no free 2780 // callee save register is available. 2781 // 2782 // The problem is where to invoke spill-save. 2783 // - if invoked between e) and f), we may lock callee save 2784 // register in "spill-save" that destroys the receiver register 2785 // before f) is executed 2786 // - if we rearrange f) to be earlier (by loading %o0) it 2787 // may destroy a value on the stack that is currently in %o0 2788 // and is waiting to be spilled 2789 // - if we keep the receiver locked while doing spill-save, 2790 // we cannot spill it as it is spill-locked 2791 // 2792 void LIRGenerator::do_Invoke(Invoke* x) { 2793 CallingConvention* cc = frame_map()->java_calling_convention(x->signature(), true); 2794 2795 LIR_OprList* arg_list = cc->args(); 2796 LIRItemList* args = invoke_visit_arguments(x); 2797 LIR_Opr receiver = LIR_OprFact::illegalOpr; 2798 2799 // setup result register 2800 LIR_Opr result_register = LIR_OprFact::illegalOpr; 2801 if (x->type() != voidType) { 2802 result_register = result_register_for(x->type()); 2803 } 2804 2805 CodeEmitInfo* info = state_for(x, x->state()); 2806 2807 invoke_load_arguments(x, args, arg_list); 2808 2809 if (x->has_receiver()) { 2810 args->at(0)->load_item_force(LIR_Assembler::receiverOpr()); 2811 receiver = args->at(0)->result(); 2812 } 2813 2814 // emit invoke code 2815 assert(receiver->is_illegal() || receiver->is_equal(LIR_Assembler::receiverOpr()), "must match"); 2816 2817 // JSR 292 2818 // Preserve the SP over MethodHandle call sites, if needed. 2819 ciMethod* target = x->target(); 2820 bool is_method_handle_invoke = (// %%% FIXME: Are both of these relevant? 2821 target->is_method_handle_intrinsic() || 2822 target->is_compiled_lambda_form()); 2823 if (is_method_handle_invoke) { 2824 info->set_is_method_handle_invoke(true); 2825 if(FrameMap::method_handle_invoke_SP_save_opr() != LIR_OprFact::illegalOpr) { 2826 __ move(FrameMap::stack_pointer(), FrameMap::method_handle_invoke_SP_save_opr()); 2827 } 2828 } 2829 2830 switch (x->code()) { 2831 case Bytecodes::_invokestatic: 2832 __ call_static(target, result_register, 2833 SharedRuntime::get_resolve_static_call_stub(), 2834 arg_list, info); 2835 break; 2836 case Bytecodes::_invokespecial: 2837 case Bytecodes::_invokevirtual: 2838 case Bytecodes::_invokeinterface: 2839 // for loaded and final (method or class) target we still produce an inline cache, 2840 // in order to be able to call mixed mode 2841 if (x->code() == Bytecodes::_invokespecial || x->target_is_final()) { 2842 __ call_opt_virtual(target, receiver, result_register, 2843 SharedRuntime::get_resolve_opt_virtual_call_stub(), 2844 arg_list, info); 2845 } else if (x->vtable_index() < 0) { 2846 __ call_icvirtual(target, receiver, result_register, 2847 SharedRuntime::get_resolve_virtual_call_stub(), 2848 arg_list, info); 2849 } else { 2850 int entry_offset = in_bytes(Klass::vtable_start_offset()) + x->vtable_index() * vtableEntry::size_in_bytes(); 2851 int vtable_offset = entry_offset + vtableEntry::method_offset_in_bytes(); 2852 __ call_virtual(target, receiver, result_register, vtable_offset, arg_list, info); 2853 } 2854 break; 2855 case Bytecodes::_invokedynamic: { 2856 __ call_dynamic(target, receiver, result_register, 2857 SharedRuntime::get_resolve_static_call_stub(), 2858 arg_list, info); 2859 break; 2860 } 2861 default: 2862 fatal("unexpected bytecode: %s", Bytecodes::name(x->code())); 2863 break; 2864 } 2865 2866 // JSR 292 2867 // Restore the SP after MethodHandle call sites, if needed. 2868 if (is_method_handle_invoke 2869 && FrameMap::method_handle_invoke_SP_save_opr() != LIR_OprFact::illegalOpr) { 2870 __ move(FrameMap::method_handle_invoke_SP_save_opr(), FrameMap::stack_pointer()); 2871 } 2872 2873 if (x->type()->is_float() || x->type()->is_double()) { 2874 // Force rounding of results from non-strictfp when in strictfp 2875 // scope (or when we don't know the strictness of the callee, to 2876 // be safe.) 2877 if (method()->is_strict()) { 2878 if (!x->target_is_loaded() || !x->target_is_strictfp()) { 2879 result_register = round_item(result_register); 2880 } 2881 } 2882 } 2883 2884 if (result_register->is_valid()) { 2885 LIR_Opr result = rlock_result(x); 2886 __ move(result_register, result); 2887 } 2888 } 2889 2890 2891 void LIRGenerator::do_FPIntrinsics(Intrinsic* x) { 2892 assert(x->number_of_arguments() == 1, "wrong type"); 2893 LIRItem value (x->argument_at(0), this); 2894 LIR_Opr reg = rlock_result(x); 2895 value.load_item(); 2896 LIR_Opr tmp = force_to_spill(value.result(), as_BasicType(x->type())); 2897 __ move(tmp, reg); 2898 } 2899 2900 2901 2902 // Code for : x->x() {x->cond()} x->y() ? x->tval() : x->fval() 2903 void LIRGenerator::do_IfOp(IfOp* x) { 2904 #ifdef ASSERT 2905 { 2906 ValueTag xtag = x->x()->type()->tag(); 2907 ValueTag ttag = x->tval()->type()->tag(); 2908 assert(xtag == intTag || xtag == objectTag, "cannot handle others"); 2909 assert(ttag == addressTag || ttag == intTag || ttag == objectTag || ttag == longTag, "cannot handle others"); 2910 assert(ttag == x->fval()->type()->tag(), "cannot handle others"); 2911 } 2912 #endif 2913 2914 LIRItem left(x->x(), this); 2915 LIRItem right(x->y(), this); 2916 left.load_item(); 2917 if (can_inline_as_constant(right.value())) { 2918 right.dont_load_item(); 2919 } else { 2920 right.load_item(); 2921 } 2922 2923 LIRItem t_val(x->tval(), this); 2924 LIRItem f_val(x->fval(), this); 2925 t_val.dont_load_item(); 2926 f_val.dont_load_item(); 2927 LIR_Opr reg = rlock_result(x); 2928 2929 __ cmp(lir_cond(x->cond()), left.result(), right.result()); 2930 __ cmove(lir_cond(x->cond()), t_val.result(), f_val.result(), reg, as_BasicType(x->x()->type())); 2931 } 2932 2933 #ifdef JFR_HAVE_INTRINSICS 2934 void LIRGenerator::do_ClassIDIntrinsic(Intrinsic* x) { 2935 CodeEmitInfo* info = state_for(x); 2936 CodeEmitInfo* info2 = new CodeEmitInfo(info); // Clone for the second null check 2937 2938 assert(info != NULL, "must have info"); 2939 LIRItem arg(x->argument_at(0), this); 2940 2941 arg.load_item(); 2942 LIR_Opr klass = new_register(T_METADATA); 2943 __ move(new LIR_Address(arg.result(), java_lang_Class::klass_offset_in_bytes(), T_ADDRESS), klass, info); 2944 LIR_Opr id = new_register(T_LONG); 2945 ByteSize offset = KLASS_TRACE_ID_OFFSET; 2946 LIR_Address* trace_id_addr = new LIR_Address(klass, in_bytes(offset), T_LONG); 2947 2948 __ move(trace_id_addr, id); 2949 __ logical_or(id, LIR_OprFact::longConst(0x01l), id); 2950 __ store(id, trace_id_addr); 2951 2952 #ifdef TRACE_ID_META_BITS 2953 __ logical_and(id, LIR_OprFact::longConst(~TRACE_ID_META_BITS), id); 2954 #endif 2955 #ifdef TRACE_ID_SHIFT 2956 __ unsigned_shift_right(id, TRACE_ID_SHIFT, id); 2957 #endif 2958 2959 __ move(id, rlock_result(x)); 2960 } 2961 2962 void LIRGenerator::do_getEventWriter(Intrinsic* x) { 2963 LabelObj* L_end = new LabelObj(); 2964 2965 LIR_Address* jobj_addr = new LIR_Address(getThreadPointer(), 2966 in_bytes(THREAD_LOCAL_WRITER_OFFSET_JFR), 2967 T_OBJECT); 2968 LIR_Opr result = rlock_result(x); 2969 __ move_wide(jobj_addr, result); 2970 __ cmp(lir_cond_equal, result, LIR_OprFact::oopConst(NULL)); 2971 __ branch(lir_cond_equal, T_OBJECT, L_end->label()); 2972 __ move_wide(new LIR_Address(result, T_OBJECT), result); 2973 2974 __ branch_destination(L_end->label()); 2975 } 2976 2977 #endif 2978 2979 2980 void LIRGenerator::do_RuntimeCall(address routine, Intrinsic* x) { 2981 assert(x->number_of_arguments() == 0, "wrong type"); 2982 // Enforce computation of _reserved_argument_area_size which is required on some platforms. 2983 BasicTypeList signature; 2984 CallingConvention* cc = frame_map()->c_calling_convention(&signature); 2985 LIR_Opr reg = result_register_for(x->type()); 2986 __ call_runtime_leaf(routine, getThreadTemp(), 2987 reg, new LIR_OprList()); 2988 LIR_Opr result = rlock_result(x); 2989 __ move(reg, result); 2990 } 2991 2992 2993 2994 void LIRGenerator::do_Intrinsic(Intrinsic* x) { 2995 switch (x->id()) { 2996 case vmIntrinsics::_intBitsToFloat : 2997 case vmIntrinsics::_doubleToRawLongBits : 2998 case vmIntrinsics::_longBitsToDouble : 2999 case vmIntrinsics::_floatToRawIntBits : { 3000 do_FPIntrinsics(x); 3001 break; 3002 } 3003 3004 #ifdef JFR_HAVE_INTRINSICS 3005 case vmIntrinsics::_getClassId: 3006 do_ClassIDIntrinsic(x); 3007 break; 3008 case vmIntrinsics::_getEventWriter: 3009 do_getEventWriter(x); 3010 break; 3011 case vmIntrinsics::_counterTime: 3012 do_RuntimeCall(CAST_FROM_FN_PTR(address, JFR_TIME_FUNCTION), x); 3013 break; 3014 #endif 3015 3016 case vmIntrinsics::_currentTimeMillis: 3017 do_RuntimeCall(CAST_FROM_FN_PTR(address, os::javaTimeMillis), x); 3018 break; 3019 3020 case vmIntrinsics::_nanoTime: 3021 do_RuntimeCall(CAST_FROM_FN_PTR(address, os::javaTimeNanos), x); 3022 break; 3023 3024 case vmIntrinsics::_Object_init: do_RegisterFinalizer(x); break; 3025 case vmIntrinsics::_isInstance: do_isInstance(x); break; 3026 case vmIntrinsics::_isPrimitive: do_isPrimitive(x); break; 3027 case vmIntrinsics::_getClass: do_getClass(x); break; 3028 case vmIntrinsics::_currentThread: do_currentThread(x); break; 3029 3030 case vmIntrinsics::_dlog: // fall through 3031 case vmIntrinsics::_dlog10: // fall through 3032 case vmIntrinsics::_dabs: // fall through 3033 case vmIntrinsics::_dsqrt: // fall through 3034 case vmIntrinsics::_dtan: // fall through 3035 case vmIntrinsics::_dsin : // fall through 3036 case vmIntrinsics::_dcos : // fall through 3037 case vmIntrinsics::_dexp : // fall through 3038 case vmIntrinsics::_dpow : do_MathIntrinsic(x); break; 3039 case vmIntrinsics::_arraycopy: do_ArrayCopy(x); break; 3040 3041 case vmIntrinsics::_fmaD: do_FmaIntrinsic(x); break; 3042 case vmIntrinsics::_fmaF: do_FmaIntrinsic(x); break; 3043 3044 // java.nio.Buffer.checkIndex 3045 case vmIntrinsics::_checkIndex: do_NIOCheckIndex(x); break; 3046 3047 case vmIntrinsics::_compareAndSetObject: 3048 do_CompareAndSwap(x, objectType); 3049 break; 3050 case vmIntrinsics::_compareAndSetInt: 3051 do_CompareAndSwap(x, intType); 3052 break; 3053 case vmIntrinsics::_compareAndSetLong: 3054 do_CompareAndSwap(x, longType); 3055 break; 3056 3057 case vmIntrinsics::_loadFence : 3058 if (os::is_MP()) __ membar_acquire(); 3059 break; 3060 case vmIntrinsics::_storeFence: 3061 if (os::is_MP()) __ membar_release(); 3062 break; 3063 case vmIntrinsics::_fullFence : 3064 if (os::is_MP()) __ membar(); 3065 break; 3066 case vmIntrinsics::_onSpinWait: 3067 __ on_spin_wait(); 3068 break; 3069 case vmIntrinsics::_Reference_get: 3070 do_Reference_get(x); 3071 break; 3072 3073 case vmIntrinsics::_updateCRC32: 3074 case vmIntrinsics::_updateBytesCRC32: 3075 case vmIntrinsics::_updateByteBufferCRC32: 3076 do_update_CRC32(x); 3077 break; 3078 3079 case vmIntrinsics::_updateBytesCRC32C: 3080 case vmIntrinsics::_updateDirectByteBufferCRC32C: 3081 do_update_CRC32C(x); 3082 break; 3083 3084 case vmIntrinsics::_vectorizedMismatch: 3085 do_vectorizedMismatch(x); 3086 break; 3087 3088 default: ShouldNotReachHere(); break; 3089 } 3090 } 3091 3092 void LIRGenerator::profile_arguments(ProfileCall* x) { 3093 if (compilation()->profile_arguments()) { 3094 int bci = x->bci_of_invoke(); 3095 ciMethodData* md = x->method()->method_data_or_null(); 3096 assert(md != NULL, "Sanity"); 3097 ciProfileData* data = md->bci_to_data(bci); 3098 if (data != NULL) { 3099 if ((data->is_CallTypeData() && data->as_CallTypeData()->has_arguments()) || 3100 (data->is_VirtualCallTypeData() && data->as_VirtualCallTypeData()->has_arguments())) { 3101 ByteSize extra = data->is_CallTypeData() ? CallTypeData::args_data_offset() : VirtualCallTypeData::args_data_offset(); 3102 int base_offset = md->byte_offset_of_slot(data, extra); 3103 LIR_Opr mdp = LIR_OprFact::illegalOpr; 3104 ciTypeStackSlotEntries* args = data->is_CallTypeData() ? ((ciCallTypeData*)data)->args() : ((ciVirtualCallTypeData*)data)->args(); 3105 3106 Bytecodes::Code bc = x->method()->java_code_at_bci(bci); 3107 int start = 0; 3108 int stop = data->is_CallTypeData() ? ((ciCallTypeData*)data)->number_of_arguments() : ((ciVirtualCallTypeData*)data)->number_of_arguments(); 3109 if (x->callee()->is_loaded() && x->callee()->is_static() && Bytecodes::has_receiver(bc)) { 3110 // first argument is not profiled at call (method handle invoke) 3111 assert(x->method()->raw_code_at_bci(bci) == Bytecodes::_invokehandle, "invokehandle expected"); 3112 start = 1; 3113 } 3114 ciSignature* callee_signature = x->callee()->signature(); 3115 // method handle call to virtual method 3116 bool has_receiver = x->callee()->is_loaded() && !x->callee()->is_static() && !Bytecodes::has_receiver(bc); 3117 ciSignatureStream callee_signature_stream(callee_signature, has_receiver ? x->callee()->holder() : NULL); 3118 3119 bool ignored_will_link; 3120 ciSignature* signature_at_call = NULL; 3121 x->method()->get_method_at_bci(bci, ignored_will_link, &signature_at_call); 3122 ciSignatureStream signature_at_call_stream(signature_at_call); 3123 3124 // if called through method handle invoke, some arguments may have been popped 3125 for (int i = 0; i < stop && i+start < x->nb_profiled_args(); i++) { 3126 int off = in_bytes(TypeEntriesAtCall::argument_type_offset(i)) - in_bytes(TypeEntriesAtCall::args_data_offset()); 3127 ciKlass* exact = profile_type(md, base_offset, off, 3128 args->type(i), x->profiled_arg_at(i+start), mdp, 3129 !x->arg_needs_null_check(i+start), 3130 signature_at_call_stream.next_klass(), callee_signature_stream.next_klass()); 3131 if (exact != NULL) { 3132 md->set_argument_type(bci, i, exact); 3133 } 3134 } 3135 } else { 3136 #ifdef ASSERT 3137 Bytecodes::Code code = x->method()->raw_code_at_bci(x->bci_of_invoke()); 3138 int n = x->nb_profiled_args(); 3139 assert(MethodData::profile_parameters() && (MethodData::profile_arguments_jsr292_only() || 3140 (x->inlined() && ((code == Bytecodes::_invokedynamic && n <= 1) || (code == Bytecodes::_invokehandle && n <= 2)))), 3141 "only at JSR292 bytecodes"); 3142 #endif 3143 } 3144 } 3145 } 3146 } 3147 3148 // profile parameters on entry to an inlined method 3149 void LIRGenerator::profile_parameters_at_call(ProfileCall* x) { 3150 if (compilation()->profile_parameters() && x->inlined()) { 3151 ciMethodData* md = x->callee()->method_data_or_null(); 3152 if (md != NULL) { 3153 ciParametersTypeData* parameters_type_data = md->parameters_type_data(); 3154 if (parameters_type_data != NULL) { 3155 ciTypeStackSlotEntries* parameters = parameters_type_data->parameters(); 3156 LIR_Opr mdp = LIR_OprFact::illegalOpr; 3157 bool has_receiver = !x->callee()->is_static(); 3158 ciSignature* sig = x->callee()->signature(); 3159 ciSignatureStream sig_stream(sig, has_receiver ? x->callee()->holder() : NULL); 3160 int i = 0; // to iterate on the Instructions 3161 Value arg = x->recv(); 3162 bool not_null = false; 3163 int bci = x->bci_of_invoke(); 3164 Bytecodes::Code bc = x->method()->java_code_at_bci(bci); 3165 // The first parameter is the receiver so that's what we start 3166 // with if it exists. One exception is method handle call to 3167 // virtual method: the receiver is in the args list 3168 if (arg == NULL || !Bytecodes::has_receiver(bc)) { 3169 i = 1; 3170 arg = x->profiled_arg_at(0); 3171 not_null = !x->arg_needs_null_check(0); 3172 } 3173 int k = 0; // to iterate on the profile data 3174 for (;;) { 3175 intptr_t profiled_k = parameters->type(k); 3176 ciKlass* exact = profile_type(md, md->byte_offset_of_slot(parameters_type_data, ParametersTypeData::type_offset(0)), 3177 in_bytes(ParametersTypeData::type_offset(k)) - in_bytes(ParametersTypeData::type_offset(0)), 3178 profiled_k, arg, mdp, not_null, sig_stream.next_klass(), NULL); 3179 // If the profile is known statically set it once for all and do not emit any code 3180 if (exact != NULL) { 3181 md->set_parameter_type(k, exact); 3182 } 3183 k++; 3184 if (k >= parameters_type_data->number_of_parameters()) { 3185 #ifdef ASSERT 3186 int extra = 0; 3187 if (MethodData::profile_arguments() && TypeProfileParmsLimit != -1 && 3188 x->nb_profiled_args() >= TypeProfileParmsLimit && 3189 x->recv() != NULL && Bytecodes::has_receiver(bc)) { 3190 extra += 1; 3191 } 3192 assert(i == x->nb_profiled_args() - extra || (TypeProfileParmsLimit != -1 && TypeProfileArgsLimit > TypeProfileParmsLimit), "unused parameters?"); 3193 #endif 3194 break; 3195 } 3196 arg = x->profiled_arg_at(i); 3197 not_null = !x->arg_needs_null_check(i); 3198 i++; 3199 } 3200 } 3201 } 3202 } 3203 } 3204 3205 void LIRGenerator::do_ProfileCall(ProfileCall* x) { 3206 // Need recv in a temporary register so it interferes with the other temporaries 3207 LIR_Opr recv = LIR_OprFact::illegalOpr; 3208 LIR_Opr mdo = new_register(T_OBJECT); 3209 // tmp is used to hold the counters on SPARC 3210 LIR_Opr tmp = new_pointer_register(); 3211 3212 if (x->nb_profiled_args() > 0) { 3213 profile_arguments(x); 3214 } 3215 3216 // profile parameters on inlined method entry including receiver 3217 if (x->recv() != NULL || x->nb_profiled_args() > 0) { 3218 profile_parameters_at_call(x); 3219 } 3220 3221 if (x->recv() != NULL) { 3222 LIRItem value(x->recv(), this); 3223 value.load_item(); 3224 recv = new_register(T_OBJECT); 3225 __ move(value.result(), recv); 3226 } 3227 __ profile_call(x->method(), x->bci_of_invoke(), x->callee(), mdo, recv, tmp, x->known_holder()); 3228 } 3229 3230 void LIRGenerator::do_ProfileReturnType(ProfileReturnType* x) { 3231 int bci = x->bci_of_invoke(); 3232 ciMethodData* md = x->method()->method_data_or_null(); 3233 assert(md != NULL, "Sanity"); 3234 ciProfileData* data = md->bci_to_data(bci); 3235 if (data != NULL) { 3236 assert(data->is_CallTypeData() || data->is_VirtualCallTypeData(), "wrong profile data type"); 3237 ciReturnTypeEntry* ret = data->is_CallTypeData() ? ((ciCallTypeData*)data)->ret() : ((ciVirtualCallTypeData*)data)->ret(); 3238 LIR_Opr mdp = LIR_OprFact::illegalOpr; 3239 3240 bool ignored_will_link; 3241 ciSignature* signature_at_call = NULL; 3242 x->method()->get_method_at_bci(bci, ignored_will_link, &signature_at_call); 3243 3244 // The offset within the MDO of the entry to update may be too large 3245 // to be used in load/store instructions on some platforms. So have 3246 // profile_type() compute the address of the profile in a register. 3247 ciKlass* exact = profile_type(md, md->byte_offset_of_slot(data, ret->type_offset()), 0, 3248 ret->type(), x->ret(), mdp, 3249 !x->needs_null_check(), 3250 signature_at_call->return_type()->as_klass(), 3251 x->callee()->signature()->return_type()->as_klass()); 3252 if (exact != NULL) { 3253 md->set_return_type(bci, exact); 3254 } 3255 } 3256 } 3257 3258 void LIRGenerator::do_ProfileInvoke(ProfileInvoke* x) { 3259 // We can safely ignore accessors here, since c2 will inline them anyway, 3260 // accessors are also always mature. 3261 if (!x->inlinee()->is_accessor()) { 3262 CodeEmitInfo* info = state_for(x, x->state(), true); 3263 // Notify the runtime very infrequently only to take care of counter overflows 3264 int freq_log = Tier23InlineeNotifyFreqLog; 3265 double scale; 3266 if (_method->has_option_value("CompileThresholdScaling", scale)) { 3267 freq_log = CompilerConfig::scaled_freq_log(freq_log, scale); 3268 } 3269 increment_event_counter_impl(info, x->inlinee(), LIR_OprFact::intConst(InvocationCounter::count_increment), right_n_bits(freq_log), InvocationEntryBci, false, true); 3270 } 3271 } 3272 3273 void LIRGenerator::increment_backedge_counter_conditionally(LIR_Condition cond, LIR_Opr left, LIR_Opr right, CodeEmitInfo* info, int left_bci, int right_bci, int bci) { 3274 if (compilation()->count_backedges()) { 3275 __ cmp(cond, left, right); 3276 LIR_Opr step = new_register(T_INT); 3277 LIR_Opr plus_one = LIR_OprFact::intConst(InvocationCounter::count_increment); 3278 LIR_Opr zero = LIR_OprFact::intConst(0); 3279 __ cmove(cond, 3280 (left_bci < bci) ? plus_one : zero, 3281 (right_bci < bci) ? plus_one : zero, 3282 step, left->type()); 3283 increment_backedge_counter(info, step, bci); 3284 } 3285 } 3286 3287 3288 void LIRGenerator::increment_event_counter(CodeEmitInfo* info, LIR_Opr step, int bci, bool backedge) { 3289 int freq_log = 0; 3290 int level = compilation()->env()->comp_level(); 3291 if (level == CompLevel_limited_profile) { 3292 freq_log = (backedge ? Tier2BackedgeNotifyFreqLog : Tier2InvokeNotifyFreqLog); 3293 } else if (level == CompLevel_full_profile) { 3294 freq_log = (backedge ? Tier3BackedgeNotifyFreqLog : Tier3InvokeNotifyFreqLog); 3295 } else { 3296 ShouldNotReachHere(); 3297 } 3298 // Increment the appropriate invocation/backedge counter and notify the runtime. 3299 double scale; 3300 if (_method->has_option_value("CompileThresholdScaling", scale)) { 3301 freq_log = CompilerConfig::scaled_freq_log(freq_log, scale); 3302 } 3303 increment_event_counter_impl(info, info->scope()->method(), step, right_n_bits(freq_log), bci, backedge, true); 3304 } 3305 3306 void LIRGenerator::decrement_age(CodeEmitInfo* info) { 3307 ciMethod* method = info->scope()->method(); 3308 MethodCounters* mc_adr = method->ensure_method_counters(); 3309 if (mc_adr != NULL) { 3310 LIR_Opr mc = new_pointer_register(); 3311 __ move(LIR_OprFact::intptrConst(mc_adr), mc); 3312 int offset = in_bytes(MethodCounters::nmethod_age_offset()); 3313 LIR_Address* counter = new LIR_Address(mc, offset, T_INT); 3314 LIR_Opr result = new_register(T_INT); 3315 __ load(counter, result); 3316 __ sub(result, LIR_OprFact::intConst(1), result); 3317 __ store(result, counter); 3318 // DeoptimizeStub will reexecute from the current state in code info. 3319 CodeStub* deopt = new DeoptimizeStub(info, Deoptimization::Reason_tenured, 3320 Deoptimization::Action_make_not_entrant); 3321 __ cmp(lir_cond_lessEqual, result, LIR_OprFact::intConst(0)); 3322 __ branch(lir_cond_lessEqual, T_INT, deopt); 3323 } 3324 } 3325 3326 3327 void LIRGenerator::increment_event_counter_impl(CodeEmitInfo* info, 3328 ciMethod *method, LIR_Opr step, int frequency, 3329 int bci, bool backedge, bool notify) { 3330 assert(frequency == 0 || is_power_of_2(frequency + 1), "Frequency must be x^2 - 1 or 0"); 3331 int level = _compilation->env()->comp_level(); 3332 assert(level > CompLevel_simple, "Shouldn't be here"); 3333 3334 int offset = -1; 3335 LIR_Opr counter_holder = NULL; 3336 if (level == CompLevel_limited_profile) { 3337 MethodCounters* counters_adr = method->ensure_method_counters(); 3338 if (counters_adr == NULL) { 3339 bailout("method counters allocation failed"); 3340 return; 3341 } 3342 counter_holder = new_pointer_register(); 3343 __ move(LIR_OprFact::intptrConst(counters_adr), counter_holder); 3344 offset = in_bytes(backedge ? MethodCounters::backedge_counter_offset() : 3345 MethodCounters::invocation_counter_offset()); 3346 } else if (level == CompLevel_full_profile) { 3347 counter_holder = new_register(T_METADATA); 3348 offset = in_bytes(backedge ? MethodData::backedge_counter_offset() : 3349 MethodData::invocation_counter_offset()); 3350 ciMethodData* md = method->method_data_or_null(); 3351 assert(md != NULL, "Sanity"); 3352 __ metadata2reg(md->constant_encoding(), counter_holder); 3353 } else { 3354 ShouldNotReachHere(); 3355 } 3356 LIR_Address* counter = new LIR_Address(counter_holder, offset, T_INT); 3357 LIR_Opr result = new_register(T_INT); 3358 __ load(counter, result); 3359 __ add(result, step, result); 3360 __ store(result, counter); 3361 if (notify && (!backedge || UseOnStackReplacement)) { 3362 LIR_Opr meth = LIR_OprFact::metadataConst(method->constant_encoding()); 3363 // The bci for info can point to cmp for if's we want the if bci 3364 CodeStub* overflow = new CounterOverflowStub(info, bci, meth); 3365 int freq = frequency << InvocationCounter::count_shift; 3366 if (freq == 0) { 3367 if (!step->is_constant()) { 3368 __ cmp(lir_cond_notEqual, step, LIR_OprFact::intConst(0)); 3369 __ branch(lir_cond_notEqual, T_ILLEGAL, overflow); 3370 } else { 3371 __ branch(lir_cond_always, T_ILLEGAL, overflow); 3372 } 3373 } else { 3374 LIR_Opr mask = load_immediate(freq, T_INT); 3375 if (!step->is_constant()) { 3376 // If step is 0, make sure the overflow check below always fails 3377 __ cmp(lir_cond_notEqual, step, LIR_OprFact::intConst(0)); 3378 __ cmove(lir_cond_notEqual, result, LIR_OprFact::intConst(InvocationCounter::count_increment), result, T_INT); 3379 } 3380 __ logical_and(result, mask, result); 3381 __ cmp(lir_cond_equal, result, LIR_OprFact::intConst(0)); 3382 __ branch(lir_cond_equal, T_INT, overflow); 3383 } 3384 __ branch_destination(overflow->continuation()); 3385 } 3386 } 3387 3388 void LIRGenerator::do_RuntimeCall(RuntimeCall* x) { 3389 LIR_OprList* args = new LIR_OprList(x->number_of_arguments()); 3390 BasicTypeList* signature = new BasicTypeList(x->number_of_arguments()); 3391 3392 if (x->pass_thread()) { 3393 signature->append(LP64_ONLY(T_LONG) NOT_LP64(T_INT)); // thread 3394 args->append(getThreadPointer()); 3395 } 3396 3397 for (int i = 0; i < x->number_of_arguments(); i++) { 3398 Value a = x->argument_at(i); 3399 LIRItem* item = new LIRItem(a, this); 3400 item->load_item(); 3401 args->append(item->result()); 3402 signature->append(as_BasicType(a->type())); 3403 } 3404 3405 LIR_Opr result = call_runtime(signature, args, x->entry(), x->type(), NULL); 3406 if (x->type() == voidType) { 3407 set_no_result(x); 3408 } else { 3409 __ move(result, rlock_result(x)); 3410 } 3411 } 3412 3413 #ifdef ASSERT 3414 void LIRGenerator::do_Assert(Assert *x) { 3415 ValueTag tag = x->x()->type()->tag(); 3416 If::Condition cond = x->cond(); 3417 3418 LIRItem xitem(x->x(), this); 3419 LIRItem yitem(x->y(), this); 3420 LIRItem* xin = &xitem; 3421 LIRItem* yin = &yitem; 3422 3423 assert(tag == intTag, "Only integer assertions are valid!"); 3424 3425 xin->load_item(); 3426 yin->dont_load_item(); 3427 3428 set_no_result(x); 3429 3430 LIR_Opr left = xin->result(); 3431 LIR_Opr right = yin->result(); 3432 3433 __ lir_assert(lir_cond(x->cond()), left, right, x->message(), true); 3434 } 3435 #endif 3436 3437 void LIRGenerator::do_RangeCheckPredicate(RangeCheckPredicate *x) { 3438 3439 3440 Instruction *a = x->x(); 3441 Instruction *b = x->y(); 3442 if (!a || StressRangeCheckElimination) { 3443 assert(!b || StressRangeCheckElimination, "B must also be null"); 3444 3445 CodeEmitInfo *info = state_for(x, x->state()); 3446 CodeStub* stub = new PredicateFailedStub(info); 3447 3448 __ jump(stub); 3449 } else if (a->type()->as_IntConstant() && b->type()->as_IntConstant()) { 3450 int a_int = a->type()->as_IntConstant()->value(); 3451 int b_int = b->type()->as_IntConstant()->value(); 3452 3453 bool ok = false; 3454 3455 switch(x->cond()) { 3456 case Instruction::eql: ok = (a_int == b_int); break; 3457 case Instruction::neq: ok = (a_int != b_int); break; 3458 case Instruction::lss: ok = (a_int < b_int); break; 3459 case Instruction::leq: ok = (a_int <= b_int); break; 3460 case Instruction::gtr: ok = (a_int > b_int); break; 3461 case Instruction::geq: ok = (a_int >= b_int); break; 3462 case Instruction::aeq: ok = ((unsigned int)a_int >= (unsigned int)b_int); break; 3463 case Instruction::beq: ok = ((unsigned int)a_int <= (unsigned int)b_int); break; 3464 default: ShouldNotReachHere(); 3465 } 3466 3467 if (ok) { 3468 3469 CodeEmitInfo *info = state_for(x, x->state()); 3470 CodeStub* stub = new PredicateFailedStub(info); 3471 3472 __ jump(stub); 3473 } 3474 } else { 3475 3476 ValueTag tag = x->x()->type()->tag(); 3477 If::Condition cond = x->cond(); 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 deoptimizations are valid!"); 3484 3485 xin->load_item(); 3486 yin->dont_load_item(); 3487 set_no_result(x); 3488 3489 LIR_Opr left = xin->result(); 3490 LIR_Opr right = yin->result(); 3491 3492 CodeEmitInfo *info = state_for(x, x->state()); 3493 CodeStub* stub = new PredicateFailedStub(info); 3494 3495 __ cmp(lir_cond(cond), left, right); 3496 __ branch(lir_cond(cond), right->type(), stub); 3497 } 3498 } 3499 3500 3501 LIR_Opr LIRGenerator::call_runtime(Value arg1, address entry, ValueType* result_type, CodeEmitInfo* info) { 3502 LIRItemList args(1); 3503 LIRItem value(arg1, this); 3504 args.append(&value); 3505 BasicTypeList signature; 3506 signature.append(as_BasicType(arg1->type())); 3507 3508 return call_runtime(&signature, &args, entry, result_type, info); 3509 } 3510 3511 3512 LIR_Opr LIRGenerator::call_runtime(Value arg1, Value arg2, address entry, ValueType* result_type, CodeEmitInfo* info) { 3513 LIRItemList args(2); 3514 LIRItem value1(arg1, this); 3515 LIRItem value2(arg2, this); 3516 args.append(&value1); 3517 args.append(&value2); 3518 BasicTypeList signature; 3519 signature.append(as_BasicType(arg1->type())); 3520 signature.append(as_BasicType(arg2->type())); 3521 3522 return call_runtime(&signature, &args, entry, result_type, info); 3523 } 3524 3525 3526 LIR_Opr LIRGenerator::call_runtime(BasicTypeArray* signature, LIR_OprList* args, 3527 address entry, ValueType* result_type, CodeEmitInfo* info) { 3528 // get a result register 3529 LIR_Opr phys_reg = LIR_OprFact::illegalOpr; 3530 LIR_Opr result = LIR_OprFact::illegalOpr; 3531 if (result_type->tag() != voidTag) { 3532 result = new_register(result_type); 3533 phys_reg = result_register_for(result_type); 3534 } 3535 3536 // move the arguments into the correct location 3537 CallingConvention* cc = frame_map()->c_calling_convention(signature); 3538 assert(cc->length() == args->length(), "argument mismatch"); 3539 for (int i = 0; i < args->length(); i++) { 3540 LIR_Opr arg = args->at(i); 3541 LIR_Opr loc = cc->at(i); 3542 if (loc->is_register()) { 3543 __ move(arg, loc); 3544 } else { 3545 LIR_Address* addr = loc->as_address_ptr(); 3546 // if (!can_store_as_constant(arg)) { 3547 // LIR_Opr tmp = new_register(arg->type()); 3548 // __ move(arg, tmp); 3549 // arg = tmp; 3550 // } 3551 if (addr->type() == T_LONG || addr->type() == T_DOUBLE) { 3552 __ unaligned_move(arg, addr); 3553 } else { 3554 __ move(arg, addr); 3555 } 3556 } 3557 } 3558 3559 if (info) { 3560 __ call_runtime(entry, getThreadTemp(), phys_reg, cc->args(), info); 3561 } else { 3562 __ call_runtime_leaf(entry, getThreadTemp(), phys_reg, cc->args()); 3563 } 3564 if (result->is_valid()) { 3565 __ move(phys_reg, result); 3566 } 3567 return result; 3568 } 3569 3570 3571 LIR_Opr LIRGenerator::call_runtime(BasicTypeArray* signature, LIRItemList* args, 3572 address entry, ValueType* result_type, CodeEmitInfo* info) { 3573 // get a result register 3574 LIR_Opr phys_reg = LIR_OprFact::illegalOpr; 3575 LIR_Opr result = LIR_OprFact::illegalOpr; 3576 if (result_type->tag() != voidTag) { 3577 result = new_register(result_type); 3578 phys_reg = result_register_for(result_type); 3579 } 3580 3581 // move the arguments into the correct location 3582 CallingConvention* cc = frame_map()->c_calling_convention(signature); 3583 3584 assert(cc->length() == args->length(), "argument mismatch"); 3585 for (int i = 0; i < args->length(); i++) { 3586 LIRItem* arg = args->at(i); 3587 LIR_Opr loc = cc->at(i); 3588 if (loc->is_register()) { 3589 arg->load_item_force(loc); 3590 } else { 3591 LIR_Address* addr = loc->as_address_ptr(); 3592 arg->load_for_store(addr->type()); 3593 if (addr->type() == T_LONG || addr->type() == T_DOUBLE) { 3594 __ unaligned_move(arg->result(), addr); 3595 } else { 3596 __ move(arg->result(), addr); 3597 } 3598 } 3599 } 3600 3601 if (info) { 3602 __ call_runtime(entry, getThreadTemp(), phys_reg, cc->args(), info); 3603 } else { 3604 __ call_runtime_leaf(entry, getThreadTemp(), phys_reg, cc->args()); 3605 } 3606 if (result->is_valid()) { 3607 __ move(phys_reg, result); 3608 } 3609 return result; 3610 } 3611 3612 void LIRGenerator::do_MemBar(MemBar* x) { 3613 if (os::is_MP()) { 3614 LIR_Code code = x->code(); 3615 switch(code) { 3616 case lir_membar_acquire : __ membar_acquire(); break; 3617 case lir_membar_release : __ membar_release(); break; 3618 case lir_membar : __ membar(); break; 3619 case lir_membar_loadload : __ membar_loadload(); break; 3620 case lir_membar_storestore: __ membar_storestore(); break; 3621 case lir_membar_loadstore : __ membar_loadstore(); break; 3622 case lir_membar_storeload : __ membar_storeload(); break; 3623 default : ShouldNotReachHere(); break; 3624 } 3625 } 3626 } 3627 3628 LIR_Opr LIRGenerator::mask_boolean(LIR_Opr array, LIR_Opr value, CodeEmitInfo*& null_check_info) { 3629 LIR_Opr value_fixed = rlock_byte(T_BYTE); 3630 if (TwoOperandLIRForm) { 3631 __ move(value, value_fixed); 3632 __ logical_and(value_fixed, LIR_OprFact::intConst(1), value_fixed); 3633 } else { 3634 __ logical_and(value, LIR_OprFact::intConst(1), value_fixed); 3635 } 3636 LIR_Opr klass = new_register(T_METADATA); 3637 __ move(new LIR_Address(array, oopDesc::klass_offset_in_bytes(), T_ADDRESS), klass, null_check_info); 3638 null_check_info = NULL; 3639 LIR_Opr layout = new_register(T_INT); 3640 __ move(new LIR_Address(klass, in_bytes(Klass::layout_helper_offset()), T_INT), layout); 3641 int diffbit = Klass::layout_helper_boolean_diffbit(); 3642 __ logical_and(layout, LIR_OprFact::intConst(diffbit), layout); 3643 __ cmp(lir_cond_notEqual, layout, LIR_OprFact::intConst(0)); 3644 __ cmove(lir_cond_notEqual, value_fixed, value, value_fixed, T_BYTE); 3645 value = value_fixed; 3646 return value; 3647 } 3648 3649 LIR_Opr LIRGenerator::maybe_mask_boolean(StoreIndexed* x, LIR_Opr array, LIR_Opr value, CodeEmitInfo*& null_check_info) { 3650 if (x->check_boolean()) { 3651 value = mask_boolean(array, value, null_check_info); 3652 } 3653 return value; 3654 }