builder.cc revision 012a072d06474404ff488d181eb3d4a504c5cbe7
1/* 2 * Copyright (C) 2014 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17#include "builder.h" 18 19#include "art_field-inl.h" 20#include "base/logging.h" 21#include "class_linker.h" 22#include "dex/verified_method.h" 23#include "dex_file-inl.h" 24#include "dex_instruction-inl.h" 25#include "dex/verified_method.h" 26#include "driver/compiler_driver-inl.h" 27#include "driver/compiler_options.h" 28#include "mirror/class_loader.h" 29#include "mirror/dex_cache.h" 30#include "nodes.h" 31#include "primitive.h" 32#include "scoped_thread_state_change.h" 33#include "thread.h" 34 35namespace art { 36 37/** 38 * Helper class to add HTemporary instructions. This class is used when 39 * converting a DEX instruction to multiple HInstruction, and where those 40 * instructions do not die at the following instruction, but instead spans 41 * multiple instructions. 42 */ 43class Temporaries : public ValueObject { 44 public: 45 explicit Temporaries(HGraph* graph) : graph_(graph), index_(0) {} 46 47 void Add(HInstruction* instruction) { 48 HInstruction* temp = new (graph_->GetArena()) HTemporary(index_); 49 instruction->GetBlock()->AddInstruction(temp); 50 51 DCHECK(temp->GetPrevious() == instruction); 52 53 size_t offset; 54 if (instruction->GetType() == Primitive::kPrimLong 55 || instruction->GetType() == Primitive::kPrimDouble) { 56 offset = 2; 57 } else { 58 offset = 1; 59 } 60 index_ += offset; 61 62 graph_->UpdateTemporariesVRegSlots(index_); 63 } 64 65 private: 66 HGraph* const graph_; 67 68 // Current index in the temporary stack, updated by `Add`. 69 size_t index_; 70}; 71 72class SwitchTable : public ValueObject { 73 public: 74 SwitchTable(const Instruction& instruction, uint32_t dex_pc, bool sparse) 75 : instruction_(instruction), dex_pc_(dex_pc), sparse_(sparse) { 76 int32_t table_offset = instruction.VRegB_31t(); 77 const uint16_t* table = reinterpret_cast<const uint16_t*>(&instruction) + table_offset; 78 if (sparse) { 79 CHECK_EQ(table[0], static_cast<uint16_t>(Instruction::kSparseSwitchSignature)); 80 } else { 81 CHECK_EQ(table[0], static_cast<uint16_t>(Instruction::kPackedSwitchSignature)); 82 } 83 num_entries_ = table[1]; 84 values_ = reinterpret_cast<const int32_t*>(&table[2]); 85 } 86 87 uint16_t GetNumEntries() const { 88 return num_entries_; 89 } 90 91 void CheckIndex(size_t index) const { 92 if (sparse_) { 93 // In a sparse table, we have num_entries_ keys and num_entries_ values, in that order. 94 DCHECK_LT(index, 2 * static_cast<size_t>(num_entries_)); 95 } else { 96 // In a packed table, we have the starting key and num_entries_ values. 97 DCHECK_LT(index, 1 + static_cast<size_t>(num_entries_)); 98 } 99 } 100 101 int32_t GetEntryAt(size_t index) const { 102 CheckIndex(index); 103 return values_[index]; 104 } 105 106 uint32_t GetDexPcForIndex(size_t index) const { 107 CheckIndex(index); 108 return dex_pc_ + 109 (reinterpret_cast<const int16_t*>(values_ + index) - 110 reinterpret_cast<const int16_t*>(&instruction_)); 111 } 112 113 // Index of the first value in the table. 114 size_t GetFirstValueIndex() const { 115 if (sparse_) { 116 // In a sparse table, we have num_entries_ keys and num_entries_ values, in that order. 117 return num_entries_; 118 } else { 119 // In a packed table, we have the starting key and num_entries_ values. 120 return 1; 121 } 122 } 123 124 private: 125 const Instruction& instruction_; 126 const uint32_t dex_pc_; 127 128 // Whether this is a sparse-switch table (or a packed-switch one). 129 const bool sparse_; 130 131 // This can't be const as it needs to be computed off of the given instruction, and complicated 132 // expressions in the initializer list seemed very ugly. 133 uint16_t num_entries_; 134 135 const int32_t* values_; 136 137 DISALLOW_COPY_AND_ASSIGN(SwitchTable); 138}; 139 140void HGraphBuilder::InitializeLocals(uint16_t count) { 141 graph_->SetNumberOfVRegs(count); 142 locals_.SetSize(count); 143 for (int i = 0; i < count; i++) { 144 HLocal* local = new (arena_) HLocal(i); 145 entry_block_->AddInstruction(local); 146 locals_.Put(i, local); 147 } 148} 149 150void HGraphBuilder::InitializeParameters(uint16_t number_of_parameters) { 151 // dex_compilation_unit_ is null only when unit testing. 152 if (dex_compilation_unit_ == nullptr) { 153 return; 154 } 155 156 graph_->SetNumberOfInVRegs(number_of_parameters); 157 const char* shorty = dex_compilation_unit_->GetShorty(); 158 int locals_index = locals_.Size() - number_of_parameters; 159 int parameter_index = 0; 160 161 if (!dex_compilation_unit_->IsStatic()) { 162 // Add the implicit 'this' argument, not expressed in the signature. 163 HParameterValue* parameter = 164 new (arena_) HParameterValue(parameter_index++, Primitive::kPrimNot, true); 165 entry_block_->AddInstruction(parameter); 166 HLocal* local = GetLocalAt(locals_index++); 167 entry_block_->AddInstruction(new (arena_) HStoreLocal(local, parameter)); 168 number_of_parameters--; 169 } 170 171 uint32_t pos = 1; 172 for (int i = 0; i < number_of_parameters; i++) { 173 HParameterValue* parameter = 174 new (arena_) HParameterValue(parameter_index++, Primitive::GetType(shorty[pos++])); 175 entry_block_->AddInstruction(parameter); 176 HLocal* local = GetLocalAt(locals_index++); 177 // Store the parameter value in the local that the dex code will use 178 // to reference that parameter. 179 entry_block_->AddInstruction(new (arena_) HStoreLocal(local, parameter)); 180 bool is_wide = (parameter->GetType() == Primitive::kPrimLong) 181 || (parameter->GetType() == Primitive::kPrimDouble); 182 if (is_wide) { 183 i++; 184 locals_index++; 185 parameter_index++; 186 } 187 } 188} 189 190template<typename T> 191void HGraphBuilder::If_22t(const Instruction& instruction, uint32_t dex_pc) { 192 int32_t target_offset = instruction.GetTargetOffset(); 193 HBasicBlock* branch_target = FindBlockStartingAt(dex_pc + target_offset); 194 HBasicBlock* fallthrough_target = FindBlockStartingAt(dex_pc + instruction.SizeInCodeUnits()); 195 DCHECK(branch_target != nullptr); 196 DCHECK(fallthrough_target != nullptr); 197 PotentiallyAddSuspendCheck(branch_target, dex_pc); 198 HInstruction* first = LoadLocal(instruction.VRegA(), Primitive::kPrimInt); 199 HInstruction* second = LoadLocal(instruction.VRegB(), Primitive::kPrimInt); 200 T* comparison = new (arena_) T(first, second); 201 current_block_->AddInstruction(comparison); 202 HInstruction* ifinst = new (arena_) HIf(comparison); 203 current_block_->AddInstruction(ifinst); 204 current_block_->AddSuccessor(branch_target); 205 current_block_->AddSuccessor(fallthrough_target); 206 current_block_ = nullptr; 207} 208 209template<typename T> 210void HGraphBuilder::If_21t(const Instruction& instruction, uint32_t dex_pc) { 211 int32_t target_offset = instruction.GetTargetOffset(); 212 HBasicBlock* branch_target = FindBlockStartingAt(dex_pc + target_offset); 213 HBasicBlock* fallthrough_target = FindBlockStartingAt(dex_pc + instruction.SizeInCodeUnits()); 214 DCHECK(branch_target != nullptr); 215 DCHECK(fallthrough_target != nullptr); 216 PotentiallyAddSuspendCheck(branch_target, dex_pc); 217 HInstruction* value = LoadLocal(instruction.VRegA(), Primitive::kPrimInt); 218 T* comparison = new (arena_) T(value, graph_->GetIntConstant(0)); 219 current_block_->AddInstruction(comparison); 220 HInstruction* ifinst = new (arena_) HIf(comparison); 221 current_block_->AddInstruction(ifinst); 222 current_block_->AddSuccessor(branch_target); 223 current_block_->AddSuccessor(fallthrough_target); 224 current_block_ = nullptr; 225} 226 227void HGraphBuilder::MaybeRecordStat(MethodCompilationStat compilation_stat) { 228 if (compilation_stats_ != nullptr) { 229 compilation_stats_->RecordStat(compilation_stat); 230 } 231} 232 233bool HGraphBuilder::SkipCompilation(const DexFile::CodeItem& code_item, 234 size_t number_of_branches) { 235 const CompilerOptions& compiler_options = compiler_driver_->GetCompilerOptions(); 236 CompilerOptions::CompilerFilter compiler_filter = compiler_options.GetCompilerFilter(); 237 if (compiler_filter == CompilerOptions::kEverything) { 238 return false; 239 } 240 241 if (compiler_options.IsHugeMethod(code_item.insns_size_in_code_units_)) { 242 VLOG(compiler) << "Skip compilation of huge method " 243 << PrettyMethod(dex_compilation_unit_->GetDexMethodIndex(), *dex_file_) 244 << ": " << code_item.insns_size_in_code_units_ << " code units"; 245 MaybeRecordStat(MethodCompilationStat::kNotCompiledHugeMethod); 246 return true; 247 } 248 249 // If it's large and contains no branches, it's likely to be machine generated initialization. 250 if (compiler_options.IsLargeMethod(code_item.insns_size_in_code_units_) 251 && (number_of_branches == 0)) { 252 VLOG(compiler) << "Skip compilation of large method with no branch " 253 << PrettyMethod(dex_compilation_unit_->GetDexMethodIndex(), *dex_file_) 254 << ": " << code_item.insns_size_in_code_units_ << " code units"; 255 MaybeRecordStat(MethodCompilationStat::kNotCompiledLargeMethodNoBranches); 256 return true; 257 } 258 259 return false; 260} 261 262bool HGraphBuilder::BuildGraph(const DexFile::CodeItem& code_item) { 263 DCHECK(graph_->GetBlocks().IsEmpty()); 264 265 const uint16_t* code_ptr = code_item.insns_; 266 const uint16_t* code_end = code_item.insns_ + code_item.insns_size_in_code_units_; 267 code_start_ = code_ptr; 268 269 // Setup the graph with the entry block and exit block. 270 entry_block_ = new (arena_) HBasicBlock(graph_, 0); 271 graph_->AddBlock(entry_block_); 272 exit_block_ = new (arena_) HBasicBlock(graph_, kNoDexPc); 273 graph_->SetEntryBlock(entry_block_); 274 graph_->SetExitBlock(exit_block_); 275 276 InitializeLocals(code_item.registers_size_); 277 graph_->SetMaximumNumberOfOutVRegs(code_item.outs_size_); 278 279 // Compute the number of dex instructions, blocks, and branches. We will 280 // check these values against limits given to the compiler. 281 size_t number_of_branches = 0; 282 283 // To avoid splitting blocks, we compute ahead of time the instructions that 284 // start a new block, and create these blocks. 285 if (!ComputeBranchTargets(code_ptr, code_end, &number_of_branches)) { 286 MaybeRecordStat(MethodCompilationStat::kNotCompiledBranchOutsideMethodCode); 287 return false; 288 } 289 290 // Note that the compiler driver is null when unit testing. 291 if ((compiler_driver_ != nullptr) && SkipCompilation(code_item, number_of_branches)) { 292 return false; 293 } 294 295 // Also create blocks for catch handlers. 296 if (code_item.tries_size_ != 0) { 297 const uint8_t* handlers_ptr = DexFile::GetCatchHandlerData(code_item, 0); 298 uint32_t handlers_size = DecodeUnsignedLeb128(&handlers_ptr); 299 for (uint32_t idx = 0; idx < handlers_size; ++idx) { 300 CatchHandlerIterator iterator(handlers_ptr); 301 for (; iterator.HasNext(); iterator.Next()) { 302 uint32_t address = iterator.GetHandlerAddress(); 303 HBasicBlock* block = FindBlockStartingAt(address); 304 if (block == nullptr) { 305 block = new (arena_) HBasicBlock(graph_, address); 306 branch_targets_.Put(address, block); 307 } 308 block->SetIsCatchBlock(); 309 } 310 handlers_ptr = iterator.EndDataPointer(); 311 } 312 } 313 314 InitializeParameters(code_item.ins_size_); 315 316 size_t dex_pc = 0; 317 while (code_ptr < code_end) { 318 // Update the current block if dex_pc starts a new block. 319 MaybeUpdateCurrentBlock(dex_pc); 320 const Instruction& instruction = *Instruction::At(code_ptr); 321 if (!AnalyzeDexInstruction(instruction, dex_pc)) { 322 return false; 323 } 324 dex_pc += instruction.SizeInCodeUnits(); 325 code_ptr += instruction.SizeInCodeUnits(); 326 } 327 328 // Add the exit block at the end to give it the highest id. 329 graph_->AddBlock(exit_block_); 330 exit_block_->AddInstruction(new (arena_) HExit()); 331 // Add the suspend check to the entry block. 332 entry_block_->AddInstruction(new (arena_) HSuspendCheck(0)); 333 entry_block_->AddInstruction(new (arena_) HGoto()); 334 335 return true; 336} 337 338void HGraphBuilder::MaybeUpdateCurrentBlock(size_t index) { 339 HBasicBlock* block = FindBlockStartingAt(index); 340 if (block == nullptr) { 341 return; 342 } 343 344 if (current_block_ != nullptr) { 345 // Branching instructions clear current_block, so we know 346 // the last instruction of the current block is not a branching 347 // instruction. We add an unconditional goto to the found block. 348 current_block_->AddInstruction(new (arena_) HGoto()); 349 current_block_->AddSuccessor(block); 350 } 351 graph_->AddBlock(block); 352 current_block_ = block; 353} 354 355bool HGraphBuilder::ComputeBranchTargets(const uint16_t* code_ptr, 356 const uint16_t* code_end, 357 size_t* number_of_branches) { 358 branch_targets_.SetSize(code_end - code_ptr); 359 360 // Create the first block for the dex instructions, single successor of the entry block. 361 HBasicBlock* block = new (arena_) HBasicBlock(graph_, 0); 362 branch_targets_.Put(0, block); 363 entry_block_->AddSuccessor(block); 364 365 // Iterate over all instructions and find branching instructions. Create blocks for 366 // the locations these instructions branch to. 367 uint32_t dex_pc = 0; 368 while (code_ptr < code_end) { 369 const Instruction& instruction = *Instruction::At(code_ptr); 370 if (instruction.IsBranch()) { 371 (*number_of_branches)++; 372 int32_t target = instruction.GetTargetOffset() + dex_pc; 373 // Create a block for the target instruction. 374 if (FindBlockStartingAt(target) == nullptr) { 375 block = new (arena_) HBasicBlock(graph_, target); 376 branch_targets_.Put(target, block); 377 } 378 dex_pc += instruction.SizeInCodeUnits(); 379 code_ptr += instruction.SizeInCodeUnits(); 380 381 if (code_ptr >= code_end) { 382 if (instruction.CanFlowThrough()) { 383 // In the normal case we should never hit this but someone can artificially forge a dex 384 // file to fall-through out the method code. In this case we bail out compilation. 385 return false; 386 } 387 } else if (FindBlockStartingAt(dex_pc) == nullptr) { 388 block = new (arena_) HBasicBlock(graph_, dex_pc); 389 branch_targets_.Put(dex_pc, block); 390 } 391 } else if (instruction.IsSwitch()) { 392 SwitchTable table(instruction, dex_pc, instruction.Opcode() == Instruction::SPARSE_SWITCH); 393 394 uint16_t num_entries = table.GetNumEntries(); 395 396 // In a packed-switch, the entry at index 0 is the starting key. In a sparse-switch, the 397 // entry at index 0 is the first key, and values are after *all* keys. 398 size_t offset = table.GetFirstValueIndex(); 399 400 // Use a larger loop counter type to avoid overflow issues. 401 for (size_t i = 0; i < num_entries; ++i) { 402 // The target of the case. 403 uint32_t target = dex_pc + table.GetEntryAt(i + offset); 404 if (FindBlockStartingAt(target) == nullptr) { 405 block = new (arena_) HBasicBlock(graph_, target); 406 branch_targets_.Put(target, block); 407 } 408 409 // The next case gets its own block. 410 if (i < num_entries) { 411 block = new (arena_) HBasicBlock(graph_, target); 412 branch_targets_.Put(table.GetDexPcForIndex(i), block); 413 } 414 } 415 416 // Fall-through. Add a block if there is more code afterwards. 417 dex_pc += instruction.SizeInCodeUnits(); 418 code_ptr += instruction.SizeInCodeUnits(); 419 if (code_ptr >= code_end) { 420 // In the normal case we should never hit this but someone can artificially forge a dex 421 // file to fall-through out the method code. In this case we bail out compilation. 422 // (A switch can fall-through so we don't need to check CanFlowThrough().) 423 return false; 424 } else if (FindBlockStartingAt(dex_pc) == nullptr) { 425 block = new (arena_) HBasicBlock(graph_, dex_pc); 426 branch_targets_.Put(dex_pc, block); 427 } 428 } else { 429 code_ptr += instruction.SizeInCodeUnits(); 430 dex_pc += instruction.SizeInCodeUnits(); 431 } 432 } 433 return true; 434} 435 436HBasicBlock* HGraphBuilder::FindBlockStartingAt(int32_t index) const { 437 DCHECK_GE(index, 0); 438 return branch_targets_.Get(index); 439} 440 441template<typename T> 442void HGraphBuilder::Unop_12x(const Instruction& instruction, Primitive::Type type) { 443 HInstruction* first = LoadLocal(instruction.VRegB(), type); 444 current_block_->AddInstruction(new (arena_) T(type, first)); 445 UpdateLocal(instruction.VRegA(), current_block_->GetLastInstruction()); 446} 447 448void HGraphBuilder::Conversion_12x(const Instruction& instruction, 449 Primitive::Type input_type, 450 Primitive::Type result_type, 451 uint32_t dex_pc) { 452 HInstruction* first = LoadLocal(instruction.VRegB(), input_type); 453 current_block_->AddInstruction(new (arena_) HTypeConversion(result_type, first, dex_pc)); 454 UpdateLocal(instruction.VRegA(), current_block_->GetLastInstruction()); 455} 456 457template<typename T> 458void HGraphBuilder::Binop_23x(const Instruction& instruction, Primitive::Type type) { 459 HInstruction* first = LoadLocal(instruction.VRegB(), type); 460 HInstruction* second = LoadLocal(instruction.VRegC(), type); 461 current_block_->AddInstruction(new (arena_) T(type, first, second)); 462 UpdateLocal(instruction.VRegA(), current_block_->GetLastInstruction()); 463} 464 465template<typename T> 466void HGraphBuilder::Binop_23x(const Instruction& instruction, 467 Primitive::Type type, 468 uint32_t dex_pc) { 469 HInstruction* first = LoadLocal(instruction.VRegB(), type); 470 HInstruction* second = LoadLocal(instruction.VRegC(), type); 471 current_block_->AddInstruction(new (arena_) T(type, first, second, dex_pc)); 472 UpdateLocal(instruction.VRegA(), current_block_->GetLastInstruction()); 473} 474 475template<typename T> 476void HGraphBuilder::Binop_23x_shift(const Instruction& instruction, 477 Primitive::Type type) { 478 HInstruction* first = LoadLocal(instruction.VRegB(), type); 479 HInstruction* second = LoadLocal(instruction.VRegC(), Primitive::kPrimInt); 480 current_block_->AddInstruction(new (arena_) T(type, first, second)); 481 UpdateLocal(instruction.VRegA(), current_block_->GetLastInstruction()); 482} 483 484void HGraphBuilder::Binop_23x_cmp(const Instruction& instruction, 485 Primitive::Type type, 486 HCompare::Bias bias) { 487 HInstruction* first = LoadLocal(instruction.VRegB(), type); 488 HInstruction* second = LoadLocal(instruction.VRegC(), type); 489 current_block_->AddInstruction(new (arena_) HCompare(type, first, second, bias)); 490 UpdateLocal(instruction.VRegA(), current_block_->GetLastInstruction()); 491} 492 493template<typename T> 494void HGraphBuilder::Binop_12x(const Instruction& instruction, Primitive::Type type) { 495 HInstruction* first = LoadLocal(instruction.VRegA(), type); 496 HInstruction* second = LoadLocal(instruction.VRegB(), type); 497 current_block_->AddInstruction(new (arena_) T(type, first, second)); 498 UpdateLocal(instruction.VRegA(), current_block_->GetLastInstruction()); 499} 500 501template<typename T> 502void HGraphBuilder::Binop_12x_shift(const Instruction& instruction, Primitive::Type type) { 503 HInstruction* first = LoadLocal(instruction.VRegA(), type); 504 HInstruction* second = LoadLocal(instruction.VRegB(), Primitive::kPrimInt); 505 current_block_->AddInstruction(new (arena_) T(type, first, second)); 506 UpdateLocal(instruction.VRegA(), current_block_->GetLastInstruction()); 507} 508 509template<typename T> 510void HGraphBuilder::Binop_12x(const Instruction& instruction, 511 Primitive::Type type, 512 uint32_t dex_pc) { 513 HInstruction* first = LoadLocal(instruction.VRegA(), type); 514 HInstruction* second = LoadLocal(instruction.VRegB(), type); 515 current_block_->AddInstruction(new (arena_) T(type, first, second, dex_pc)); 516 UpdateLocal(instruction.VRegA(), current_block_->GetLastInstruction()); 517} 518 519template<typename T> 520void HGraphBuilder::Binop_22s(const Instruction& instruction, bool reverse) { 521 HInstruction* first = LoadLocal(instruction.VRegB(), Primitive::kPrimInt); 522 HInstruction* second = graph_->GetIntConstant(instruction.VRegC_22s()); 523 if (reverse) { 524 std::swap(first, second); 525 } 526 current_block_->AddInstruction(new (arena_) T(Primitive::kPrimInt, first, second)); 527 UpdateLocal(instruction.VRegA(), current_block_->GetLastInstruction()); 528} 529 530template<typename T> 531void HGraphBuilder::Binop_22b(const Instruction& instruction, bool reverse) { 532 HInstruction* first = LoadLocal(instruction.VRegB(), Primitive::kPrimInt); 533 HInstruction* second = graph_->GetIntConstant(instruction.VRegC_22b()); 534 if (reverse) { 535 std::swap(first, second); 536 } 537 current_block_->AddInstruction(new (arena_) T(Primitive::kPrimInt, first, second)); 538 UpdateLocal(instruction.VRegA(), current_block_->GetLastInstruction()); 539} 540 541static bool RequiresConstructorBarrier(const DexCompilationUnit* cu, const CompilerDriver& driver) { 542 Thread* self = Thread::Current(); 543 return cu->IsConstructor() 544 && driver.RequiresConstructorBarrier(self, cu->GetDexFile(), cu->GetClassDefIndex()); 545} 546 547void HGraphBuilder::BuildReturn(const Instruction& instruction, Primitive::Type type) { 548 if (type == Primitive::kPrimVoid) { 549 if (graph_->ShouldGenerateConstructorBarrier()) { 550 // The compilation unit is null during testing. 551 if (dex_compilation_unit_ != nullptr) { 552 DCHECK(RequiresConstructorBarrier(dex_compilation_unit_, *compiler_driver_)) 553 << "Inconsistent use of ShouldGenerateConstructorBarrier. Should not generate a barrier."; 554 } 555 current_block_->AddInstruction(new (arena_) HMemoryBarrier(kStoreStore)); 556 } 557 current_block_->AddInstruction(new (arena_) HReturnVoid()); 558 } else { 559 HInstruction* value = LoadLocal(instruction.VRegA(), type); 560 current_block_->AddInstruction(new (arena_) HReturn(value)); 561 } 562 current_block_->AddSuccessor(exit_block_); 563 current_block_ = nullptr; 564} 565 566bool HGraphBuilder::BuildInvoke(const Instruction& instruction, 567 uint32_t dex_pc, 568 uint32_t method_idx, 569 uint32_t number_of_vreg_arguments, 570 bool is_range, 571 uint32_t* args, 572 uint32_t register_index) { 573 Instruction::Code opcode = instruction.Opcode(); 574 InvokeType invoke_type; 575 switch (opcode) { 576 case Instruction::INVOKE_STATIC: 577 case Instruction::INVOKE_STATIC_RANGE: 578 invoke_type = kStatic; 579 break; 580 case Instruction::INVOKE_DIRECT: 581 case Instruction::INVOKE_DIRECT_RANGE: 582 invoke_type = kDirect; 583 break; 584 case Instruction::INVOKE_VIRTUAL: 585 case Instruction::INVOKE_VIRTUAL_RANGE: 586 invoke_type = kVirtual; 587 break; 588 case Instruction::INVOKE_INTERFACE: 589 case Instruction::INVOKE_INTERFACE_RANGE: 590 invoke_type = kInterface; 591 break; 592 case Instruction::INVOKE_SUPER_RANGE: 593 case Instruction::INVOKE_SUPER: 594 invoke_type = kSuper; 595 break; 596 default: 597 LOG(FATAL) << "Unexpected invoke op: " << opcode; 598 return false; 599 } 600 601 const DexFile::MethodId& method_id = dex_file_->GetMethodId(method_idx); 602 const DexFile::ProtoId& proto_id = dex_file_->GetProtoId(method_id.proto_idx_); 603 const char* descriptor = dex_file_->StringDataByIdx(proto_id.shorty_idx_); 604 Primitive::Type return_type = Primitive::GetType(descriptor[0]); 605 bool is_instance_call = invoke_type != kStatic; 606 size_t number_of_arguments = strlen(descriptor) - (is_instance_call ? 0 : 1); 607 608 MethodReference target_method(dex_file_, method_idx); 609 uintptr_t direct_code; 610 uintptr_t direct_method; 611 int table_index; 612 InvokeType optimized_invoke_type = invoke_type; 613 614 if (!compiler_driver_->ComputeInvokeInfo(dex_compilation_unit_, dex_pc, true, true, 615 &optimized_invoke_type, &target_method, &table_index, 616 &direct_code, &direct_method)) { 617 VLOG(compiler) << "Did not compile " << PrettyMethod(method_idx, *dex_file_) 618 << " because a method call could not be resolved"; 619 MaybeRecordStat(MethodCompilationStat::kNotCompiledUnresolvedMethod); 620 return false; 621 } 622 DCHECK(optimized_invoke_type != kSuper); 623 624 // By default, consider that the called method implicitly requires 625 // an initialization check of its declaring method. 626 HInvokeStaticOrDirect::ClinitCheckRequirement clinit_check_requirement = 627 HInvokeStaticOrDirect::ClinitCheckRequirement::kImplicit; 628 // Potential class initialization check, in the case of a static method call. 629 HClinitCheck* clinit_check = nullptr; 630 // Replace calls to String.<init> with StringFactory. 631 int32_t string_init_offset = 0; 632 bool is_string_init = compiler_driver_->IsStringInit(method_idx, dex_file_, &string_init_offset); 633 if (is_string_init) { 634 return_type = Primitive::kPrimNot; 635 is_instance_call = false; 636 number_of_arguments--; 637 invoke_type = kStatic; 638 optimized_invoke_type = kStatic; 639 } 640 641 HInvoke* invoke = nullptr; 642 643 if (optimized_invoke_type == kVirtual) { 644 invoke = new (arena_) HInvokeVirtual( 645 arena_, number_of_arguments, return_type, dex_pc, method_idx, table_index); 646 } else if (optimized_invoke_type == kInterface) { 647 invoke = new (arena_) HInvokeInterface( 648 arena_, number_of_arguments, return_type, dex_pc, method_idx, table_index); 649 } else { 650 DCHECK(optimized_invoke_type == kDirect || optimized_invoke_type == kStatic); 651 // Sharpening to kDirect only works if we compile PIC. 652 DCHECK((optimized_invoke_type == invoke_type) || (optimized_invoke_type != kDirect) 653 || compiler_driver_->GetCompilerOptions().GetCompilePic()); 654 bool is_recursive = 655 (target_method.dex_method_index == outer_compilation_unit_->GetDexMethodIndex()) 656 && (target_method.dex_file == outer_compilation_unit_->GetDexFile()); 657 658 if (optimized_invoke_type == kStatic) { 659 ScopedObjectAccess soa(Thread::Current()); 660 StackHandleScope<4> hs(soa.Self()); 661 Handle<mirror::DexCache> dex_cache(hs.NewHandle( 662 dex_compilation_unit_->GetClassLinker()->FindDexCache( 663 *dex_compilation_unit_->GetDexFile()))); 664 Handle<mirror::ClassLoader> class_loader(hs.NewHandle( 665 soa.Decode<mirror::ClassLoader*>(dex_compilation_unit_->GetClassLoader()))); 666 ArtMethod* resolved_method = compiler_driver_->ResolveMethod( 667 soa, dex_cache, class_loader, dex_compilation_unit_, method_idx, optimized_invoke_type); 668 669 if (resolved_method == nullptr) { 670 MaybeRecordStat(MethodCompilationStat::kNotCompiledUnresolvedMethod); 671 return false; 672 } 673 674 const DexFile& outer_dex_file = *outer_compilation_unit_->GetDexFile(); 675 Handle<mirror::DexCache> outer_dex_cache(hs.NewHandle( 676 outer_compilation_unit_->GetClassLinker()->FindDexCache(outer_dex_file))); 677 Handle<mirror::Class> referrer_class(hs.NewHandle(GetOutermostCompilingClass())); 678 679 // The index at which the method's class is stored in the DexCache's type array. 680 uint32_t storage_index = DexFile::kDexNoIndex; 681 bool is_referrer_class = (resolved_method->GetDeclaringClass() == referrer_class.Get()); 682 if (is_referrer_class) { 683 storage_index = referrer_class->GetDexTypeIndex(); 684 } else if (outer_dex_cache.Get() == dex_cache.Get()) { 685 // Get `storage_index` from IsClassOfStaticMethodAvailableToReferrer. 686 compiler_driver_->IsClassOfStaticMethodAvailableToReferrer(outer_dex_cache.Get(), 687 referrer_class.Get(), 688 resolved_method, 689 method_idx, 690 &storage_index); 691 } 692 693 if (referrer_class.Get()->IsSubClass(resolved_method->GetDeclaringClass())) { 694 // If the referrer class is the declaring class or a subclass 695 // of the declaring class, no class initialization is needed 696 // before the static method call. 697 clinit_check_requirement = HInvokeStaticOrDirect::ClinitCheckRequirement::kNone; 698 } else if (storage_index != DexFile::kDexNoIndex) { 699 // If the method's class type index is available, check 700 // whether we should add an explicit class initialization 701 // check for its declaring class before the static method call. 702 703 // TODO: find out why this check is needed. 704 bool is_in_dex_cache = compiler_driver_->CanAssumeTypeIsPresentInDexCache( 705 *outer_compilation_unit_->GetDexFile(), storage_index); 706 bool is_initialized = 707 resolved_method->GetDeclaringClass()->IsInitialized() && is_in_dex_cache; 708 709 if (is_initialized) { 710 clinit_check_requirement = HInvokeStaticOrDirect::ClinitCheckRequirement::kNone; 711 } else { 712 clinit_check_requirement = HInvokeStaticOrDirect::ClinitCheckRequirement::kExplicit; 713 HLoadClass* load_class = new (arena_) HLoadClass( 714 graph_->GetCurrentMethod(), 715 storage_index, 716 *dex_compilation_unit_->GetDexFile(), 717 is_referrer_class, 718 dex_pc); 719 current_block_->AddInstruction(load_class); 720 clinit_check = new (arena_) HClinitCheck(load_class, dex_pc); 721 current_block_->AddInstruction(clinit_check); 722 } 723 } 724 } 725 726 invoke = new (arena_) HInvokeStaticOrDirect( 727 arena_, number_of_arguments, return_type, dex_pc, target_method.dex_method_index, 728 is_recursive, string_init_offset, invoke_type, optimized_invoke_type, 729 clinit_check_requirement); 730 } 731 732 size_t start_index = 0; 733 Temporaries temps(graph_); 734 if (is_instance_call) { 735 HInstruction* arg = LoadLocal(is_range ? register_index : args[0], Primitive::kPrimNot); 736 HNullCheck* null_check = new (arena_) HNullCheck(arg, dex_pc); 737 current_block_->AddInstruction(null_check); 738 temps.Add(null_check); 739 invoke->SetArgumentAt(0, null_check); 740 start_index = 1; 741 } 742 743 uint32_t descriptor_index = 1; 744 uint32_t argument_index = start_index; 745 if (is_string_init) { 746 start_index = 1; 747 } 748 for (size_t i = start_index; i < number_of_vreg_arguments; i++, argument_index++) { 749 Primitive::Type type = Primitive::GetType(descriptor[descriptor_index++]); 750 bool is_wide = (type == Primitive::kPrimLong) || (type == Primitive::kPrimDouble); 751 if (!is_range && is_wide && args[i] + 1 != args[i + 1]) { 752 LOG(WARNING) << "Non sequential register pair in " << dex_compilation_unit_->GetSymbol() 753 << " at " << dex_pc; 754 // We do not implement non sequential register pair. 755 MaybeRecordStat(MethodCompilationStat::kNotCompiledNonSequentialRegPair); 756 return false; 757 } 758 HInstruction* arg = LoadLocal(is_range ? register_index + i : args[i], type); 759 invoke->SetArgumentAt(argument_index, arg); 760 if (is_wide) { 761 i++; 762 } 763 } 764 DCHECK_EQ(argument_index, number_of_arguments); 765 766 if (clinit_check_requirement == HInvokeStaticOrDirect::ClinitCheckRequirement::kExplicit) { 767 // Add the class initialization check as last input of `invoke`. 768 DCHECK(clinit_check != nullptr); 769 invoke->SetArgumentAt(argument_index, clinit_check); 770 } 771 772 current_block_->AddInstruction(invoke); 773 latest_result_ = invoke; 774 775 // Add move-result for StringFactory method. 776 if (is_string_init) { 777 uint32_t orig_this_reg = is_range ? register_index : args[0]; 778 const VerifiedMethod* verified_method = 779 compiler_driver_->GetVerifiedMethod(dex_file_, dex_compilation_unit_->GetDexMethodIndex()); 780 if (verified_method == nullptr) { 781 LOG(WARNING) << "No verified method for method calling String.<init>: " 782 << PrettyMethod(dex_compilation_unit_->GetDexMethodIndex(), *dex_file_); 783 return false; 784 } 785 const SafeMap<uint32_t, std::set<uint32_t>>& string_init_map = 786 verified_method->GetStringInitPcRegMap(); 787 auto map_it = string_init_map.find(dex_pc); 788 if (map_it != string_init_map.end()) { 789 std::set<uint32_t> reg_set = map_it->second; 790 for (auto set_it = reg_set.begin(); set_it != reg_set.end(); ++set_it) { 791 UpdateLocal(*set_it, invoke); 792 } 793 } 794 UpdateLocal(orig_this_reg, invoke); 795 } 796 return true; 797} 798 799bool HGraphBuilder::BuildInstanceFieldAccess(const Instruction& instruction, 800 uint32_t dex_pc, 801 bool is_put) { 802 uint32_t source_or_dest_reg = instruction.VRegA_22c(); 803 uint32_t obj_reg = instruction.VRegB_22c(); 804 uint16_t field_index = instruction.VRegC_22c(); 805 806 ScopedObjectAccess soa(Thread::Current()); 807 ArtField* resolved_field = 808 compiler_driver_->ComputeInstanceFieldInfo(field_index, dex_compilation_unit_, is_put, soa); 809 810 if (resolved_field == nullptr) { 811 MaybeRecordStat(MethodCompilationStat::kNotCompiledUnresolvedField); 812 return false; 813 } 814 815 Primitive::Type field_type = resolved_field->GetTypeAsPrimitiveType(); 816 817 HInstruction* object = LoadLocal(obj_reg, Primitive::kPrimNot); 818 current_block_->AddInstruction(new (arena_) HNullCheck(object, dex_pc)); 819 if (is_put) { 820 Temporaries temps(graph_); 821 HInstruction* null_check = current_block_->GetLastInstruction(); 822 // We need one temporary for the null check. 823 temps.Add(null_check); 824 HInstruction* value = LoadLocal(source_or_dest_reg, field_type); 825 current_block_->AddInstruction(new (arena_) HInstanceFieldSet( 826 null_check, 827 value, 828 field_type, 829 resolved_field->GetOffset(), 830 resolved_field->IsVolatile(), 831 field_index, 832 *dex_file_)); 833 } else { 834 current_block_->AddInstruction(new (arena_) HInstanceFieldGet( 835 current_block_->GetLastInstruction(), 836 field_type, 837 resolved_field->GetOffset(), 838 resolved_field->IsVolatile(), 839 field_index, 840 *dex_file_)); 841 842 UpdateLocal(source_or_dest_reg, current_block_->GetLastInstruction()); 843 } 844 return true; 845} 846 847mirror::Class* HGraphBuilder::GetOutermostCompilingClass() const { 848 ScopedObjectAccess soa(Thread::Current()); 849 StackHandleScope<2> hs(soa.Self()); 850 const DexFile& outer_dex_file = *outer_compilation_unit_->GetDexFile(); 851 Handle<mirror::ClassLoader> class_loader(hs.NewHandle( 852 soa.Decode<mirror::ClassLoader*>(dex_compilation_unit_->GetClassLoader()))); 853 Handle<mirror::DexCache> outer_dex_cache(hs.NewHandle( 854 outer_compilation_unit_->GetClassLinker()->FindDexCache(outer_dex_file))); 855 856 return compiler_driver_->ResolveCompilingMethodsClass( 857 soa, outer_dex_cache, class_loader, outer_compilation_unit_); 858} 859 860bool HGraphBuilder::IsOutermostCompilingClass(uint16_t type_index) const { 861 ScopedObjectAccess soa(Thread::Current()); 862 StackHandleScope<4> hs(soa.Self()); 863 Handle<mirror::DexCache> dex_cache(hs.NewHandle( 864 dex_compilation_unit_->GetClassLinker()->FindDexCache(*dex_compilation_unit_->GetDexFile()))); 865 Handle<mirror::ClassLoader> class_loader(hs.NewHandle( 866 soa.Decode<mirror::ClassLoader*>(dex_compilation_unit_->GetClassLoader()))); 867 Handle<mirror::Class> cls(hs.NewHandle(compiler_driver_->ResolveClass( 868 soa, dex_cache, class_loader, type_index, dex_compilation_unit_))); 869 Handle<mirror::Class> compiling_class(hs.NewHandle(GetOutermostCompilingClass())); 870 871 return compiling_class.Get() == cls.Get(); 872} 873 874bool HGraphBuilder::BuildStaticFieldAccess(const Instruction& instruction, 875 uint32_t dex_pc, 876 bool is_put) { 877 uint32_t source_or_dest_reg = instruction.VRegA_21c(); 878 uint16_t field_index = instruction.VRegB_21c(); 879 880 ScopedObjectAccess soa(Thread::Current()); 881 StackHandleScope<4> hs(soa.Self()); 882 Handle<mirror::DexCache> dex_cache(hs.NewHandle( 883 dex_compilation_unit_->GetClassLinker()->FindDexCache(*dex_compilation_unit_->GetDexFile()))); 884 Handle<mirror::ClassLoader> class_loader(hs.NewHandle( 885 soa.Decode<mirror::ClassLoader*>(dex_compilation_unit_->GetClassLoader()))); 886 ArtField* resolved_field = compiler_driver_->ResolveField( 887 soa, dex_cache, class_loader, dex_compilation_unit_, field_index, true); 888 889 if (resolved_field == nullptr) { 890 MaybeRecordStat(MethodCompilationStat::kNotCompiledUnresolvedField); 891 return false; 892 } 893 894 const DexFile& outer_dex_file = *outer_compilation_unit_->GetDexFile(); 895 Handle<mirror::DexCache> outer_dex_cache(hs.NewHandle( 896 outer_compilation_unit_->GetClassLinker()->FindDexCache(outer_dex_file))); 897 Handle<mirror::Class> referrer_class(hs.NewHandle(GetOutermostCompilingClass())); 898 899 // The index at which the field's class is stored in the DexCache's type array. 900 uint32_t storage_index; 901 bool is_referrer_class = (referrer_class.Get() == resolved_field->GetDeclaringClass()); 902 if (is_referrer_class) { 903 storage_index = referrer_class->GetDexTypeIndex(); 904 } else if (outer_dex_cache.Get() != dex_cache.Get()) { 905 // The compiler driver cannot currently understand multiple dex caches involved. Just bailout. 906 return false; 907 } else { 908 std::pair<bool, bool> pair = compiler_driver_->IsFastStaticField( 909 outer_dex_cache.Get(), 910 referrer_class.Get(), 911 resolved_field, 912 field_index, 913 &storage_index); 914 bool can_easily_access = is_put ? pair.second : pair.first; 915 if (!can_easily_access) { 916 return false; 917 } 918 } 919 920 // TODO: find out why this check is needed. 921 bool is_in_dex_cache = compiler_driver_->CanAssumeTypeIsPresentInDexCache( 922 *outer_compilation_unit_->GetDexFile(), storage_index); 923 bool is_initialized = resolved_field->GetDeclaringClass()->IsInitialized() && is_in_dex_cache; 924 925 HLoadClass* constant = new (arena_) HLoadClass(graph_->GetCurrentMethod(), 926 storage_index, 927 *dex_compilation_unit_->GetDexFile(), 928 is_referrer_class, 929 dex_pc); 930 current_block_->AddInstruction(constant); 931 932 HInstruction* cls = constant; 933 if (!is_initialized && !is_referrer_class) { 934 cls = new (arena_) HClinitCheck(constant, dex_pc); 935 current_block_->AddInstruction(cls); 936 } 937 938 Primitive::Type field_type = resolved_field->GetTypeAsPrimitiveType(); 939 if (is_put) { 940 // We need to keep the class alive before loading the value. 941 Temporaries temps(graph_); 942 temps.Add(cls); 943 HInstruction* value = LoadLocal(source_or_dest_reg, field_type); 944 DCHECK_EQ(value->GetType(), field_type); 945 current_block_->AddInstruction(new (arena_) HStaticFieldSet(cls, 946 value, 947 field_type, 948 resolved_field->GetOffset(), 949 resolved_field->IsVolatile(), 950 field_index, 951 *dex_file_)); 952 } else { 953 current_block_->AddInstruction(new (arena_) HStaticFieldGet(cls, 954 field_type, 955 resolved_field->GetOffset(), 956 resolved_field->IsVolatile(), 957 field_index, 958 *dex_file_)); 959 UpdateLocal(source_or_dest_reg, current_block_->GetLastInstruction()); 960 } 961 return true; 962} 963 964void HGraphBuilder::BuildCheckedDivRem(uint16_t out_vreg, 965 uint16_t first_vreg, 966 int64_t second_vreg_or_constant, 967 uint32_t dex_pc, 968 Primitive::Type type, 969 bool second_is_constant, 970 bool isDiv) { 971 DCHECK(type == Primitive::kPrimInt || type == Primitive::kPrimLong); 972 973 HInstruction* first = LoadLocal(first_vreg, type); 974 HInstruction* second = nullptr; 975 if (second_is_constant) { 976 if (type == Primitive::kPrimInt) { 977 second = graph_->GetIntConstant(second_vreg_or_constant); 978 } else { 979 second = graph_->GetLongConstant(second_vreg_or_constant); 980 } 981 } else { 982 second = LoadLocal(second_vreg_or_constant, type); 983 } 984 985 if (!second_is_constant 986 || (type == Primitive::kPrimInt && second->AsIntConstant()->GetValue() == 0) 987 || (type == Primitive::kPrimLong && second->AsLongConstant()->GetValue() == 0)) { 988 second = new (arena_) HDivZeroCheck(second, dex_pc); 989 Temporaries temps(graph_); 990 current_block_->AddInstruction(second); 991 temps.Add(current_block_->GetLastInstruction()); 992 } 993 994 if (isDiv) { 995 current_block_->AddInstruction(new (arena_) HDiv(type, first, second, dex_pc)); 996 } else { 997 current_block_->AddInstruction(new (arena_) HRem(type, first, second, dex_pc)); 998 } 999 UpdateLocal(out_vreg, current_block_->GetLastInstruction()); 1000} 1001 1002void HGraphBuilder::BuildArrayAccess(const Instruction& instruction, 1003 uint32_t dex_pc, 1004 bool is_put, 1005 Primitive::Type anticipated_type) { 1006 uint8_t source_or_dest_reg = instruction.VRegA_23x(); 1007 uint8_t array_reg = instruction.VRegB_23x(); 1008 uint8_t index_reg = instruction.VRegC_23x(); 1009 1010 // We need one temporary for the null check, one for the index, and one for the length. 1011 Temporaries temps(graph_); 1012 1013 HInstruction* object = LoadLocal(array_reg, Primitive::kPrimNot); 1014 object = new (arena_) HNullCheck(object, dex_pc); 1015 current_block_->AddInstruction(object); 1016 temps.Add(object); 1017 1018 HInstruction* length = new (arena_) HArrayLength(object); 1019 current_block_->AddInstruction(length); 1020 temps.Add(length); 1021 HInstruction* index = LoadLocal(index_reg, Primitive::kPrimInt); 1022 index = new (arena_) HBoundsCheck(index, length, dex_pc); 1023 current_block_->AddInstruction(index); 1024 temps.Add(index); 1025 if (is_put) { 1026 HInstruction* value = LoadLocal(source_or_dest_reg, anticipated_type); 1027 // TODO: Insert a type check node if the type is Object. 1028 current_block_->AddInstruction(new (arena_) HArraySet( 1029 object, index, value, anticipated_type, dex_pc)); 1030 } else { 1031 current_block_->AddInstruction(new (arena_) HArrayGet(object, index, anticipated_type)); 1032 UpdateLocal(source_or_dest_reg, current_block_->GetLastInstruction()); 1033 } 1034 graph_->SetHasBoundsChecks(true); 1035} 1036 1037void HGraphBuilder::BuildFilledNewArray(uint32_t dex_pc, 1038 uint32_t type_index, 1039 uint32_t number_of_vreg_arguments, 1040 bool is_range, 1041 uint32_t* args, 1042 uint32_t register_index) { 1043 HInstruction* length = graph_->GetIntConstant(number_of_vreg_arguments); 1044 QuickEntrypointEnum entrypoint = NeedsAccessCheck(type_index) 1045 ? kQuickAllocArrayWithAccessCheck 1046 : kQuickAllocArray; 1047 HInstruction* object = new (arena_) HNewArray(length, 1048 dex_pc, 1049 type_index, 1050 *dex_compilation_unit_->GetDexFile(), 1051 entrypoint); 1052 current_block_->AddInstruction(object); 1053 1054 const char* descriptor = dex_file_->StringByTypeIdx(type_index); 1055 DCHECK_EQ(descriptor[0], '[') << descriptor; 1056 char primitive = descriptor[1]; 1057 DCHECK(primitive == 'I' 1058 || primitive == 'L' 1059 || primitive == '[') << descriptor; 1060 bool is_reference_array = (primitive == 'L') || (primitive == '['); 1061 Primitive::Type type = is_reference_array ? Primitive::kPrimNot : Primitive::kPrimInt; 1062 1063 Temporaries temps(graph_); 1064 temps.Add(object); 1065 for (size_t i = 0; i < number_of_vreg_arguments; ++i) { 1066 HInstruction* value = LoadLocal(is_range ? register_index + i : args[i], type); 1067 HInstruction* index = graph_->GetIntConstant(i); 1068 current_block_->AddInstruction( 1069 new (arena_) HArraySet(object, index, value, type, dex_pc)); 1070 } 1071 latest_result_ = object; 1072} 1073 1074template <typename T> 1075void HGraphBuilder::BuildFillArrayData(HInstruction* object, 1076 const T* data, 1077 uint32_t element_count, 1078 Primitive::Type anticipated_type, 1079 uint32_t dex_pc) { 1080 for (uint32_t i = 0; i < element_count; ++i) { 1081 HInstruction* index = graph_->GetIntConstant(i); 1082 HInstruction* value = graph_->GetIntConstant(data[i]); 1083 current_block_->AddInstruction(new (arena_) HArraySet( 1084 object, index, value, anticipated_type, dex_pc)); 1085 } 1086} 1087 1088void HGraphBuilder::BuildFillArrayData(const Instruction& instruction, uint32_t dex_pc) { 1089 Temporaries temps(graph_); 1090 HInstruction* array = LoadLocal(instruction.VRegA_31t(), Primitive::kPrimNot); 1091 HNullCheck* null_check = new (arena_) HNullCheck(array, dex_pc); 1092 current_block_->AddInstruction(null_check); 1093 temps.Add(null_check); 1094 1095 HInstruction* length = new (arena_) HArrayLength(null_check); 1096 current_block_->AddInstruction(length); 1097 1098 int32_t payload_offset = instruction.VRegB_31t() + dex_pc; 1099 const Instruction::ArrayDataPayload* payload = 1100 reinterpret_cast<const Instruction::ArrayDataPayload*>(code_start_ + payload_offset); 1101 const uint8_t* data = payload->data; 1102 uint32_t element_count = payload->element_count; 1103 1104 // Implementation of this DEX instruction seems to be that the bounds check is 1105 // done before doing any stores. 1106 HInstruction* last_index = graph_->GetIntConstant(payload->element_count - 1); 1107 current_block_->AddInstruction(new (arena_) HBoundsCheck(last_index, length, dex_pc)); 1108 1109 switch (payload->element_width) { 1110 case 1: 1111 BuildFillArrayData(null_check, 1112 reinterpret_cast<const int8_t*>(data), 1113 element_count, 1114 Primitive::kPrimByte, 1115 dex_pc); 1116 break; 1117 case 2: 1118 BuildFillArrayData(null_check, 1119 reinterpret_cast<const int16_t*>(data), 1120 element_count, 1121 Primitive::kPrimShort, 1122 dex_pc); 1123 break; 1124 case 4: 1125 BuildFillArrayData(null_check, 1126 reinterpret_cast<const int32_t*>(data), 1127 element_count, 1128 Primitive::kPrimInt, 1129 dex_pc); 1130 break; 1131 case 8: 1132 BuildFillWideArrayData(null_check, 1133 reinterpret_cast<const int64_t*>(data), 1134 element_count, 1135 dex_pc); 1136 break; 1137 default: 1138 LOG(FATAL) << "Unknown element width for " << payload->element_width; 1139 } 1140 graph_->SetHasBoundsChecks(true); 1141} 1142 1143void HGraphBuilder::BuildFillWideArrayData(HInstruction* object, 1144 const int64_t* data, 1145 uint32_t element_count, 1146 uint32_t dex_pc) { 1147 for (uint32_t i = 0; i < element_count; ++i) { 1148 HInstruction* index = graph_->GetIntConstant(i); 1149 HInstruction* value = graph_->GetLongConstant(data[i]); 1150 current_block_->AddInstruction(new (arena_) HArraySet( 1151 object, index, value, Primitive::kPrimLong, dex_pc)); 1152 } 1153} 1154 1155bool HGraphBuilder::BuildTypeCheck(const Instruction& instruction, 1156 uint8_t destination, 1157 uint8_t reference, 1158 uint16_t type_index, 1159 uint32_t dex_pc) { 1160 bool type_known_final; 1161 bool type_known_abstract; 1162 // `CanAccessTypeWithoutChecks` will tell whether the method being 1163 // built is trying to access its own class, so that the generated 1164 // code can optimize for this case. However, the optimization does not 1165 // work for inlining, so we use `IsOutermostCompilingClass` instead. 1166 bool dont_use_is_referrers_class; 1167 bool can_access = compiler_driver_->CanAccessTypeWithoutChecks( 1168 dex_compilation_unit_->GetDexMethodIndex(), *dex_file_, type_index, 1169 &type_known_final, &type_known_abstract, &dont_use_is_referrers_class); 1170 if (!can_access) { 1171 MaybeRecordStat(MethodCompilationStat::kNotCompiledCantAccesType); 1172 return false; 1173 } 1174 HInstruction* object = LoadLocal(reference, Primitive::kPrimNot); 1175 HLoadClass* cls = new (arena_) HLoadClass( 1176 graph_->GetCurrentMethod(), 1177 type_index, 1178 *dex_compilation_unit_->GetDexFile(), 1179 IsOutermostCompilingClass(type_index), 1180 dex_pc); 1181 current_block_->AddInstruction(cls); 1182 // The class needs a temporary before being used by the type check. 1183 Temporaries temps(graph_); 1184 temps.Add(cls); 1185 if (instruction.Opcode() == Instruction::INSTANCE_OF) { 1186 current_block_->AddInstruction( 1187 new (arena_) HInstanceOf(object, cls, type_known_final, dex_pc)); 1188 UpdateLocal(destination, current_block_->GetLastInstruction()); 1189 } else { 1190 DCHECK_EQ(instruction.Opcode(), Instruction::CHECK_CAST); 1191 current_block_->AddInstruction( 1192 new (arena_) HCheckCast(object, cls, type_known_final, dex_pc)); 1193 } 1194 return true; 1195} 1196 1197bool HGraphBuilder::NeedsAccessCheck(uint32_t type_index) const { 1198 return !compiler_driver_->CanAccessInstantiableTypeWithoutChecks( 1199 dex_compilation_unit_->GetDexMethodIndex(), *dex_file_, type_index); 1200} 1201 1202void HGraphBuilder::BuildPackedSwitch(const Instruction& instruction, uint32_t dex_pc) { 1203 SwitchTable table(instruction, dex_pc, false); 1204 1205 // Value to test against. 1206 HInstruction* value = LoadLocal(instruction.VRegA(), Primitive::kPrimInt); 1207 1208 uint16_t num_entries = table.GetNumEntries(); 1209 // There should be at least one entry here. 1210 DCHECK_GT(num_entries, 0U); 1211 1212 // Chained cmp-and-branch, starting from starting_key. 1213 int32_t starting_key = table.GetEntryAt(0); 1214 1215 for (size_t i = 1; i <= num_entries; i++) { 1216 BuildSwitchCaseHelper(instruction, i, i == num_entries, table, value, starting_key + i - 1, 1217 table.GetEntryAt(i), dex_pc); 1218 } 1219} 1220 1221void HGraphBuilder::BuildSparseSwitch(const Instruction& instruction, uint32_t dex_pc) { 1222 SwitchTable table(instruction, dex_pc, true); 1223 1224 // Value to test against. 1225 HInstruction* value = LoadLocal(instruction.VRegA(), Primitive::kPrimInt); 1226 1227 uint16_t num_entries = table.GetNumEntries(); 1228 1229 for (size_t i = 0; i < num_entries; i++) { 1230 BuildSwitchCaseHelper(instruction, i, i == static_cast<size_t>(num_entries) - 1, table, value, 1231 table.GetEntryAt(i), table.GetEntryAt(i + num_entries), dex_pc); 1232 } 1233} 1234 1235void HGraphBuilder::BuildSwitchCaseHelper(const Instruction& instruction, size_t index, 1236 bool is_last_case, const SwitchTable& table, 1237 HInstruction* value, int32_t case_value_int, 1238 int32_t target_offset, uint32_t dex_pc) { 1239 HBasicBlock* case_target = FindBlockStartingAt(dex_pc + target_offset); 1240 DCHECK(case_target != nullptr); 1241 PotentiallyAddSuspendCheck(case_target, dex_pc); 1242 1243 // The current case's value. 1244 HInstruction* this_case_value = graph_->GetIntConstant(case_value_int); 1245 1246 // Compare value and this_case_value. 1247 HEqual* comparison = new (arena_) HEqual(value, this_case_value); 1248 current_block_->AddInstruction(comparison); 1249 HInstruction* ifinst = new (arena_) HIf(comparison); 1250 current_block_->AddInstruction(ifinst); 1251 1252 // Case hit: use the target offset to determine where to go. 1253 current_block_->AddSuccessor(case_target); 1254 1255 // Case miss: go to the next case (or default fall-through). 1256 // When there is a next case, we use the block stored with the table offset representing this 1257 // case (that is where we registered them in ComputeBranchTargets). 1258 // When there is no next case, we use the following instruction. 1259 // TODO: Find a good way to peel the last iteration to avoid conditional, but still have re-use. 1260 if (!is_last_case) { 1261 HBasicBlock* next_case_target = FindBlockStartingAt(table.GetDexPcForIndex(index)); 1262 DCHECK(next_case_target != nullptr); 1263 current_block_->AddSuccessor(next_case_target); 1264 1265 // Need to manually add the block, as there is no dex-pc transition for the cases. 1266 graph_->AddBlock(next_case_target); 1267 1268 current_block_ = next_case_target; 1269 } else { 1270 HBasicBlock* default_target = FindBlockStartingAt(dex_pc + instruction.SizeInCodeUnits()); 1271 DCHECK(default_target != nullptr); 1272 current_block_->AddSuccessor(default_target); 1273 current_block_ = nullptr; 1274 } 1275} 1276 1277void HGraphBuilder::PotentiallyAddSuspendCheck(HBasicBlock* target, uint32_t dex_pc) { 1278 int32_t target_offset = target->GetDexPc() - dex_pc; 1279 if (target_offset <= 0) { 1280 // DX generates back edges to the first encountered return. We can save 1281 // time of later passes by not adding redundant suspend checks. 1282 HInstruction* last_in_target = target->GetLastInstruction(); 1283 if (last_in_target != nullptr && 1284 (last_in_target->IsReturn() || last_in_target->IsReturnVoid())) { 1285 return; 1286 } 1287 1288 // Add a suspend check to backward branches which may potentially loop. We 1289 // can remove them after we recognize loops in the graph. 1290 current_block_->AddInstruction(new (arena_) HSuspendCheck(dex_pc)); 1291 } 1292} 1293 1294bool HGraphBuilder::AnalyzeDexInstruction(const Instruction& instruction, uint32_t dex_pc) { 1295 if (current_block_ == nullptr) { 1296 return true; // Dead code 1297 } 1298 1299 switch (instruction.Opcode()) { 1300 case Instruction::CONST_4: { 1301 int32_t register_index = instruction.VRegA(); 1302 HIntConstant* constant = graph_->GetIntConstant(instruction.VRegB_11n()); 1303 UpdateLocal(register_index, constant); 1304 break; 1305 } 1306 1307 case Instruction::CONST_16: { 1308 int32_t register_index = instruction.VRegA(); 1309 HIntConstant* constant = graph_->GetIntConstant(instruction.VRegB_21s()); 1310 UpdateLocal(register_index, constant); 1311 break; 1312 } 1313 1314 case Instruction::CONST: { 1315 int32_t register_index = instruction.VRegA(); 1316 HIntConstant* constant = graph_->GetIntConstant(instruction.VRegB_31i()); 1317 UpdateLocal(register_index, constant); 1318 break; 1319 } 1320 1321 case Instruction::CONST_HIGH16: { 1322 int32_t register_index = instruction.VRegA(); 1323 HIntConstant* constant = graph_->GetIntConstant(instruction.VRegB_21h() << 16); 1324 UpdateLocal(register_index, constant); 1325 break; 1326 } 1327 1328 case Instruction::CONST_WIDE_16: { 1329 int32_t register_index = instruction.VRegA(); 1330 // Get 16 bits of constant value, sign extended to 64 bits. 1331 int64_t value = instruction.VRegB_21s(); 1332 value <<= 48; 1333 value >>= 48; 1334 HLongConstant* constant = graph_->GetLongConstant(value); 1335 UpdateLocal(register_index, constant); 1336 break; 1337 } 1338 1339 case Instruction::CONST_WIDE_32: { 1340 int32_t register_index = instruction.VRegA(); 1341 // Get 32 bits of constant value, sign extended to 64 bits. 1342 int64_t value = instruction.VRegB_31i(); 1343 value <<= 32; 1344 value >>= 32; 1345 HLongConstant* constant = graph_->GetLongConstant(value); 1346 UpdateLocal(register_index, constant); 1347 break; 1348 } 1349 1350 case Instruction::CONST_WIDE: { 1351 int32_t register_index = instruction.VRegA(); 1352 HLongConstant* constant = graph_->GetLongConstant(instruction.VRegB_51l()); 1353 UpdateLocal(register_index, constant); 1354 break; 1355 } 1356 1357 case Instruction::CONST_WIDE_HIGH16: { 1358 int32_t register_index = instruction.VRegA(); 1359 int64_t value = static_cast<int64_t>(instruction.VRegB_21h()) << 48; 1360 HLongConstant* constant = graph_->GetLongConstant(value); 1361 UpdateLocal(register_index, constant); 1362 break; 1363 } 1364 1365 // Note that the SSA building will refine the types. 1366 case Instruction::MOVE: 1367 case Instruction::MOVE_FROM16: 1368 case Instruction::MOVE_16: { 1369 HInstruction* value = LoadLocal(instruction.VRegB(), Primitive::kPrimInt); 1370 UpdateLocal(instruction.VRegA(), value); 1371 break; 1372 } 1373 1374 // Note that the SSA building will refine the types. 1375 case Instruction::MOVE_WIDE: 1376 case Instruction::MOVE_WIDE_FROM16: 1377 case Instruction::MOVE_WIDE_16: { 1378 HInstruction* value = LoadLocal(instruction.VRegB(), Primitive::kPrimLong); 1379 UpdateLocal(instruction.VRegA(), value); 1380 break; 1381 } 1382 1383 case Instruction::MOVE_OBJECT: 1384 case Instruction::MOVE_OBJECT_16: 1385 case Instruction::MOVE_OBJECT_FROM16: { 1386 HInstruction* value = LoadLocal(instruction.VRegB(), Primitive::kPrimNot); 1387 UpdateLocal(instruction.VRegA(), value); 1388 break; 1389 } 1390 1391 case Instruction::RETURN_VOID: { 1392 BuildReturn(instruction, Primitive::kPrimVoid); 1393 break; 1394 } 1395 1396#define IF_XX(comparison, cond) \ 1397 case Instruction::IF_##cond: If_22t<comparison>(instruction, dex_pc); break; \ 1398 case Instruction::IF_##cond##Z: If_21t<comparison>(instruction, dex_pc); break 1399 1400 IF_XX(HEqual, EQ); 1401 IF_XX(HNotEqual, NE); 1402 IF_XX(HLessThan, LT); 1403 IF_XX(HLessThanOrEqual, LE); 1404 IF_XX(HGreaterThan, GT); 1405 IF_XX(HGreaterThanOrEqual, GE); 1406 1407 case Instruction::GOTO: 1408 case Instruction::GOTO_16: 1409 case Instruction::GOTO_32: { 1410 int32_t offset = instruction.GetTargetOffset(); 1411 HBasicBlock* target = FindBlockStartingAt(offset + dex_pc); 1412 DCHECK(target != nullptr); 1413 PotentiallyAddSuspendCheck(target, dex_pc); 1414 current_block_->AddInstruction(new (arena_) HGoto()); 1415 current_block_->AddSuccessor(target); 1416 current_block_ = nullptr; 1417 break; 1418 } 1419 1420 case Instruction::RETURN: { 1421 DCHECK_NE(return_type_, Primitive::kPrimNot); 1422 DCHECK_NE(return_type_, Primitive::kPrimLong); 1423 DCHECK_NE(return_type_, Primitive::kPrimDouble); 1424 BuildReturn(instruction, return_type_); 1425 break; 1426 } 1427 1428 case Instruction::RETURN_OBJECT: { 1429 DCHECK(return_type_ == Primitive::kPrimNot); 1430 BuildReturn(instruction, return_type_); 1431 break; 1432 } 1433 1434 case Instruction::RETURN_WIDE: { 1435 DCHECK(return_type_ == Primitive::kPrimDouble || return_type_ == Primitive::kPrimLong); 1436 BuildReturn(instruction, return_type_); 1437 break; 1438 } 1439 1440 case Instruction::INVOKE_DIRECT: 1441 case Instruction::INVOKE_INTERFACE: 1442 case Instruction::INVOKE_STATIC: 1443 case Instruction::INVOKE_SUPER: 1444 case Instruction::INVOKE_VIRTUAL: { 1445 uint32_t method_idx = instruction.VRegB_35c(); 1446 uint32_t number_of_vreg_arguments = instruction.VRegA_35c(); 1447 uint32_t args[5]; 1448 instruction.GetVarArgs(args); 1449 if (!BuildInvoke(instruction, dex_pc, method_idx, 1450 number_of_vreg_arguments, false, args, -1)) { 1451 return false; 1452 } 1453 break; 1454 } 1455 1456 case Instruction::INVOKE_DIRECT_RANGE: 1457 case Instruction::INVOKE_INTERFACE_RANGE: 1458 case Instruction::INVOKE_STATIC_RANGE: 1459 case Instruction::INVOKE_SUPER_RANGE: 1460 case Instruction::INVOKE_VIRTUAL_RANGE: { 1461 uint32_t method_idx = instruction.VRegB_3rc(); 1462 uint32_t number_of_vreg_arguments = instruction.VRegA_3rc(); 1463 uint32_t register_index = instruction.VRegC(); 1464 if (!BuildInvoke(instruction, dex_pc, method_idx, 1465 number_of_vreg_arguments, true, nullptr, register_index)) { 1466 return false; 1467 } 1468 break; 1469 } 1470 1471 case Instruction::NEG_INT: { 1472 Unop_12x<HNeg>(instruction, Primitive::kPrimInt); 1473 break; 1474 } 1475 1476 case Instruction::NEG_LONG: { 1477 Unop_12x<HNeg>(instruction, Primitive::kPrimLong); 1478 break; 1479 } 1480 1481 case Instruction::NEG_FLOAT: { 1482 Unop_12x<HNeg>(instruction, Primitive::kPrimFloat); 1483 break; 1484 } 1485 1486 case Instruction::NEG_DOUBLE: { 1487 Unop_12x<HNeg>(instruction, Primitive::kPrimDouble); 1488 break; 1489 } 1490 1491 case Instruction::NOT_INT: { 1492 Unop_12x<HNot>(instruction, Primitive::kPrimInt); 1493 break; 1494 } 1495 1496 case Instruction::NOT_LONG: { 1497 Unop_12x<HNot>(instruction, Primitive::kPrimLong); 1498 break; 1499 } 1500 1501 case Instruction::INT_TO_LONG: { 1502 Conversion_12x(instruction, Primitive::kPrimInt, Primitive::kPrimLong, dex_pc); 1503 break; 1504 } 1505 1506 case Instruction::INT_TO_FLOAT: { 1507 Conversion_12x(instruction, Primitive::kPrimInt, Primitive::kPrimFloat, dex_pc); 1508 break; 1509 } 1510 1511 case Instruction::INT_TO_DOUBLE: { 1512 Conversion_12x(instruction, Primitive::kPrimInt, Primitive::kPrimDouble, dex_pc); 1513 break; 1514 } 1515 1516 case Instruction::LONG_TO_INT: { 1517 Conversion_12x(instruction, Primitive::kPrimLong, Primitive::kPrimInt, dex_pc); 1518 break; 1519 } 1520 1521 case Instruction::LONG_TO_FLOAT: { 1522 Conversion_12x(instruction, Primitive::kPrimLong, Primitive::kPrimFloat, dex_pc); 1523 break; 1524 } 1525 1526 case Instruction::LONG_TO_DOUBLE: { 1527 Conversion_12x(instruction, Primitive::kPrimLong, Primitive::kPrimDouble, dex_pc); 1528 break; 1529 } 1530 1531 case Instruction::FLOAT_TO_INT: { 1532 Conversion_12x(instruction, Primitive::kPrimFloat, Primitive::kPrimInt, dex_pc); 1533 break; 1534 } 1535 1536 case Instruction::FLOAT_TO_LONG: { 1537 Conversion_12x(instruction, Primitive::kPrimFloat, Primitive::kPrimLong, dex_pc); 1538 break; 1539 } 1540 1541 case Instruction::FLOAT_TO_DOUBLE: { 1542 Conversion_12x(instruction, Primitive::kPrimFloat, Primitive::kPrimDouble, dex_pc); 1543 break; 1544 } 1545 1546 case Instruction::DOUBLE_TO_INT: { 1547 Conversion_12x(instruction, Primitive::kPrimDouble, Primitive::kPrimInt, dex_pc); 1548 break; 1549 } 1550 1551 case Instruction::DOUBLE_TO_LONG: { 1552 Conversion_12x(instruction, Primitive::kPrimDouble, Primitive::kPrimLong, dex_pc); 1553 break; 1554 } 1555 1556 case Instruction::DOUBLE_TO_FLOAT: { 1557 Conversion_12x(instruction, Primitive::kPrimDouble, Primitive::kPrimFloat, dex_pc); 1558 break; 1559 } 1560 1561 case Instruction::INT_TO_BYTE: { 1562 Conversion_12x(instruction, Primitive::kPrimInt, Primitive::kPrimByte, dex_pc); 1563 break; 1564 } 1565 1566 case Instruction::INT_TO_SHORT: { 1567 Conversion_12x(instruction, Primitive::kPrimInt, Primitive::kPrimShort, dex_pc); 1568 break; 1569 } 1570 1571 case Instruction::INT_TO_CHAR: { 1572 Conversion_12x(instruction, Primitive::kPrimInt, Primitive::kPrimChar, dex_pc); 1573 break; 1574 } 1575 1576 case Instruction::ADD_INT: { 1577 Binop_23x<HAdd>(instruction, Primitive::kPrimInt); 1578 break; 1579 } 1580 1581 case Instruction::ADD_LONG: { 1582 Binop_23x<HAdd>(instruction, Primitive::kPrimLong); 1583 break; 1584 } 1585 1586 case Instruction::ADD_DOUBLE: { 1587 Binop_23x<HAdd>(instruction, Primitive::kPrimDouble); 1588 break; 1589 } 1590 1591 case Instruction::ADD_FLOAT: { 1592 Binop_23x<HAdd>(instruction, Primitive::kPrimFloat); 1593 break; 1594 } 1595 1596 case Instruction::SUB_INT: { 1597 Binop_23x<HSub>(instruction, Primitive::kPrimInt); 1598 break; 1599 } 1600 1601 case Instruction::SUB_LONG: { 1602 Binop_23x<HSub>(instruction, Primitive::kPrimLong); 1603 break; 1604 } 1605 1606 case Instruction::SUB_FLOAT: { 1607 Binop_23x<HSub>(instruction, Primitive::kPrimFloat); 1608 break; 1609 } 1610 1611 case Instruction::SUB_DOUBLE: { 1612 Binop_23x<HSub>(instruction, Primitive::kPrimDouble); 1613 break; 1614 } 1615 1616 case Instruction::ADD_INT_2ADDR: { 1617 Binop_12x<HAdd>(instruction, Primitive::kPrimInt); 1618 break; 1619 } 1620 1621 case Instruction::MUL_INT: { 1622 Binop_23x<HMul>(instruction, Primitive::kPrimInt); 1623 break; 1624 } 1625 1626 case Instruction::MUL_LONG: { 1627 Binop_23x<HMul>(instruction, Primitive::kPrimLong); 1628 break; 1629 } 1630 1631 case Instruction::MUL_FLOAT: { 1632 Binop_23x<HMul>(instruction, Primitive::kPrimFloat); 1633 break; 1634 } 1635 1636 case Instruction::MUL_DOUBLE: { 1637 Binop_23x<HMul>(instruction, Primitive::kPrimDouble); 1638 break; 1639 } 1640 1641 case Instruction::DIV_INT: { 1642 BuildCheckedDivRem(instruction.VRegA(), instruction.VRegB(), instruction.VRegC(), 1643 dex_pc, Primitive::kPrimInt, false, true); 1644 break; 1645 } 1646 1647 case Instruction::DIV_LONG: { 1648 BuildCheckedDivRem(instruction.VRegA(), instruction.VRegB(), instruction.VRegC(), 1649 dex_pc, Primitive::kPrimLong, false, true); 1650 break; 1651 } 1652 1653 case Instruction::DIV_FLOAT: { 1654 Binop_23x<HDiv>(instruction, Primitive::kPrimFloat, dex_pc); 1655 break; 1656 } 1657 1658 case Instruction::DIV_DOUBLE: { 1659 Binop_23x<HDiv>(instruction, Primitive::kPrimDouble, dex_pc); 1660 break; 1661 } 1662 1663 case Instruction::REM_INT: { 1664 BuildCheckedDivRem(instruction.VRegA(), instruction.VRegB(), instruction.VRegC(), 1665 dex_pc, Primitive::kPrimInt, false, false); 1666 break; 1667 } 1668 1669 case Instruction::REM_LONG: { 1670 BuildCheckedDivRem(instruction.VRegA(), instruction.VRegB(), instruction.VRegC(), 1671 dex_pc, Primitive::kPrimLong, false, false); 1672 break; 1673 } 1674 1675 case Instruction::REM_FLOAT: { 1676 Binop_23x<HRem>(instruction, Primitive::kPrimFloat, dex_pc); 1677 break; 1678 } 1679 1680 case Instruction::REM_DOUBLE: { 1681 Binop_23x<HRem>(instruction, Primitive::kPrimDouble, dex_pc); 1682 break; 1683 } 1684 1685 case Instruction::AND_INT: { 1686 Binop_23x<HAnd>(instruction, Primitive::kPrimInt); 1687 break; 1688 } 1689 1690 case Instruction::AND_LONG: { 1691 Binop_23x<HAnd>(instruction, Primitive::kPrimLong); 1692 break; 1693 } 1694 1695 case Instruction::SHL_INT: { 1696 Binop_23x_shift<HShl>(instruction, Primitive::kPrimInt); 1697 break; 1698 } 1699 1700 case Instruction::SHL_LONG: { 1701 Binop_23x_shift<HShl>(instruction, Primitive::kPrimLong); 1702 break; 1703 } 1704 1705 case Instruction::SHR_INT: { 1706 Binop_23x_shift<HShr>(instruction, Primitive::kPrimInt); 1707 break; 1708 } 1709 1710 case Instruction::SHR_LONG: { 1711 Binop_23x_shift<HShr>(instruction, Primitive::kPrimLong); 1712 break; 1713 } 1714 1715 case Instruction::USHR_INT: { 1716 Binop_23x_shift<HUShr>(instruction, Primitive::kPrimInt); 1717 break; 1718 } 1719 1720 case Instruction::USHR_LONG: { 1721 Binop_23x_shift<HUShr>(instruction, Primitive::kPrimLong); 1722 break; 1723 } 1724 1725 case Instruction::OR_INT: { 1726 Binop_23x<HOr>(instruction, Primitive::kPrimInt); 1727 break; 1728 } 1729 1730 case Instruction::OR_LONG: { 1731 Binop_23x<HOr>(instruction, Primitive::kPrimLong); 1732 break; 1733 } 1734 1735 case Instruction::XOR_INT: { 1736 Binop_23x<HXor>(instruction, Primitive::kPrimInt); 1737 break; 1738 } 1739 1740 case Instruction::XOR_LONG: { 1741 Binop_23x<HXor>(instruction, Primitive::kPrimLong); 1742 break; 1743 } 1744 1745 case Instruction::ADD_LONG_2ADDR: { 1746 Binop_12x<HAdd>(instruction, Primitive::kPrimLong); 1747 break; 1748 } 1749 1750 case Instruction::ADD_DOUBLE_2ADDR: { 1751 Binop_12x<HAdd>(instruction, Primitive::kPrimDouble); 1752 break; 1753 } 1754 1755 case Instruction::ADD_FLOAT_2ADDR: { 1756 Binop_12x<HAdd>(instruction, Primitive::kPrimFloat); 1757 break; 1758 } 1759 1760 case Instruction::SUB_INT_2ADDR: { 1761 Binop_12x<HSub>(instruction, Primitive::kPrimInt); 1762 break; 1763 } 1764 1765 case Instruction::SUB_LONG_2ADDR: { 1766 Binop_12x<HSub>(instruction, Primitive::kPrimLong); 1767 break; 1768 } 1769 1770 case Instruction::SUB_FLOAT_2ADDR: { 1771 Binop_12x<HSub>(instruction, Primitive::kPrimFloat); 1772 break; 1773 } 1774 1775 case Instruction::SUB_DOUBLE_2ADDR: { 1776 Binop_12x<HSub>(instruction, Primitive::kPrimDouble); 1777 break; 1778 } 1779 1780 case Instruction::MUL_INT_2ADDR: { 1781 Binop_12x<HMul>(instruction, Primitive::kPrimInt); 1782 break; 1783 } 1784 1785 case Instruction::MUL_LONG_2ADDR: { 1786 Binop_12x<HMul>(instruction, Primitive::kPrimLong); 1787 break; 1788 } 1789 1790 case Instruction::MUL_FLOAT_2ADDR: { 1791 Binop_12x<HMul>(instruction, Primitive::kPrimFloat); 1792 break; 1793 } 1794 1795 case Instruction::MUL_DOUBLE_2ADDR: { 1796 Binop_12x<HMul>(instruction, Primitive::kPrimDouble); 1797 break; 1798 } 1799 1800 case Instruction::DIV_INT_2ADDR: { 1801 BuildCheckedDivRem(instruction.VRegA(), instruction.VRegA(), instruction.VRegB(), 1802 dex_pc, Primitive::kPrimInt, false, true); 1803 break; 1804 } 1805 1806 case Instruction::DIV_LONG_2ADDR: { 1807 BuildCheckedDivRem(instruction.VRegA(), instruction.VRegA(), instruction.VRegB(), 1808 dex_pc, Primitive::kPrimLong, false, true); 1809 break; 1810 } 1811 1812 case Instruction::REM_INT_2ADDR: { 1813 BuildCheckedDivRem(instruction.VRegA(), instruction.VRegA(), instruction.VRegB(), 1814 dex_pc, Primitive::kPrimInt, false, false); 1815 break; 1816 } 1817 1818 case Instruction::REM_LONG_2ADDR: { 1819 BuildCheckedDivRem(instruction.VRegA(), instruction.VRegA(), instruction.VRegB(), 1820 dex_pc, Primitive::kPrimLong, false, false); 1821 break; 1822 } 1823 1824 case Instruction::REM_FLOAT_2ADDR: { 1825 Binop_12x<HRem>(instruction, Primitive::kPrimFloat, dex_pc); 1826 break; 1827 } 1828 1829 case Instruction::REM_DOUBLE_2ADDR: { 1830 Binop_12x<HRem>(instruction, Primitive::kPrimDouble, dex_pc); 1831 break; 1832 } 1833 1834 case Instruction::SHL_INT_2ADDR: { 1835 Binop_12x_shift<HShl>(instruction, Primitive::kPrimInt); 1836 break; 1837 } 1838 1839 case Instruction::SHL_LONG_2ADDR: { 1840 Binop_12x_shift<HShl>(instruction, Primitive::kPrimLong); 1841 break; 1842 } 1843 1844 case Instruction::SHR_INT_2ADDR: { 1845 Binop_12x_shift<HShr>(instruction, Primitive::kPrimInt); 1846 break; 1847 } 1848 1849 case Instruction::SHR_LONG_2ADDR: { 1850 Binop_12x_shift<HShr>(instruction, Primitive::kPrimLong); 1851 break; 1852 } 1853 1854 case Instruction::USHR_INT_2ADDR: { 1855 Binop_12x_shift<HUShr>(instruction, Primitive::kPrimInt); 1856 break; 1857 } 1858 1859 case Instruction::USHR_LONG_2ADDR: { 1860 Binop_12x_shift<HUShr>(instruction, Primitive::kPrimLong); 1861 break; 1862 } 1863 1864 case Instruction::DIV_FLOAT_2ADDR: { 1865 Binop_12x<HDiv>(instruction, Primitive::kPrimFloat, dex_pc); 1866 break; 1867 } 1868 1869 case Instruction::DIV_DOUBLE_2ADDR: { 1870 Binop_12x<HDiv>(instruction, Primitive::kPrimDouble, dex_pc); 1871 break; 1872 } 1873 1874 case Instruction::AND_INT_2ADDR: { 1875 Binop_12x<HAnd>(instruction, Primitive::kPrimInt); 1876 break; 1877 } 1878 1879 case Instruction::AND_LONG_2ADDR: { 1880 Binop_12x<HAnd>(instruction, Primitive::kPrimLong); 1881 break; 1882 } 1883 1884 case Instruction::OR_INT_2ADDR: { 1885 Binop_12x<HOr>(instruction, Primitive::kPrimInt); 1886 break; 1887 } 1888 1889 case Instruction::OR_LONG_2ADDR: { 1890 Binop_12x<HOr>(instruction, Primitive::kPrimLong); 1891 break; 1892 } 1893 1894 case Instruction::XOR_INT_2ADDR: { 1895 Binop_12x<HXor>(instruction, Primitive::kPrimInt); 1896 break; 1897 } 1898 1899 case Instruction::XOR_LONG_2ADDR: { 1900 Binop_12x<HXor>(instruction, Primitive::kPrimLong); 1901 break; 1902 } 1903 1904 case Instruction::ADD_INT_LIT16: { 1905 Binop_22s<HAdd>(instruction, false); 1906 break; 1907 } 1908 1909 case Instruction::AND_INT_LIT16: { 1910 Binop_22s<HAnd>(instruction, false); 1911 break; 1912 } 1913 1914 case Instruction::OR_INT_LIT16: { 1915 Binop_22s<HOr>(instruction, false); 1916 break; 1917 } 1918 1919 case Instruction::XOR_INT_LIT16: { 1920 Binop_22s<HXor>(instruction, false); 1921 break; 1922 } 1923 1924 case Instruction::RSUB_INT: { 1925 Binop_22s<HSub>(instruction, true); 1926 break; 1927 } 1928 1929 case Instruction::MUL_INT_LIT16: { 1930 Binop_22s<HMul>(instruction, false); 1931 break; 1932 } 1933 1934 case Instruction::ADD_INT_LIT8: { 1935 Binop_22b<HAdd>(instruction, false); 1936 break; 1937 } 1938 1939 case Instruction::AND_INT_LIT8: { 1940 Binop_22b<HAnd>(instruction, false); 1941 break; 1942 } 1943 1944 case Instruction::OR_INT_LIT8: { 1945 Binop_22b<HOr>(instruction, false); 1946 break; 1947 } 1948 1949 case Instruction::XOR_INT_LIT8: { 1950 Binop_22b<HXor>(instruction, false); 1951 break; 1952 } 1953 1954 case Instruction::RSUB_INT_LIT8: { 1955 Binop_22b<HSub>(instruction, true); 1956 break; 1957 } 1958 1959 case Instruction::MUL_INT_LIT8: { 1960 Binop_22b<HMul>(instruction, false); 1961 break; 1962 } 1963 1964 case Instruction::DIV_INT_LIT16: 1965 case Instruction::DIV_INT_LIT8: { 1966 BuildCheckedDivRem(instruction.VRegA(), instruction.VRegB(), instruction.VRegC(), 1967 dex_pc, Primitive::kPrimInt, true, true); 1968 break; 1969 } 1970 1971 case Instruction::REM_INT_LIT16: 1972 case Instruction::REM_INT_LIT8: { 1973 BuildCheckedDivRem(instruction.VRegA(), instruction.VRegB(), instruction.VRegC(), 1974 dex_pc, Primitive::kPrimInt, true, false); 1975 break; 1976 } 1977 1978 case Instruction::SHL_INT_LIT8: { 1979 Binop_22b<HShl>(instruction, false); 1980 break; 1981 } 1982 1983 case Instruction::SHR_INT_LIT8: { 1984 Binop_22b<HShr>(instruction, false); 1985 break; 1986 } 1987 1988 case Instruction::USHR_INT_LIT8: { 1989 Binop_22b<HUShr>(instruction, false); 1990 break; 1991 } 1992 1993 case Instruction::NEW_INSTANCE: { 1994 uint16_t type_index = instruction.VRegB_21c(); 1995 if (compiler_driver_->IsStringTypeIndex(type_index, dex_file_)) { 1996 // Turn new-instance of string into a const 0. 1997 int32_t register_index = instruction.VRegA(); 1998 HNullConstant* constant = graph_->GetNullConstant(); 1999 UpdateLocal(register_index, constant); 2000 } else { 2001 QuickEntrypointEnum entrypoint = NeedsAccessCheck(type_index) 2002 ? kQuickAllocObjectWithAccessCheck 2003 : kQuickAllocObject; 2004 2005 current_block_->AddInstruction(new (arena_) HNewInstance( 2006 dex_pc, type_index, *dex_compilation_unit_->GetDexFile(), entrypoint)); 2007 UpdateLocal(instruction.VRegA(), current_block_->GetLastInstruction()); 2008 } 2009 break; 2010 } 2011 2012 case Instruction::NEW_ARRAY: { 2013 uint16_t type_index = instruction.VRegC_22c(); 2014 HInstruction* length = LoadLocal(instruction.VRegB_22c(), Primitive::kPrimInt); 2015 QuickEntrypointEnum entrypoint = NeedsAccessCheck(type_index) 2016 ? kQuickAllocArrayWithAccessCheck 2017 : kQuickAllocArray; 2018 current_block_->AddInstruction(new (arena_) HNewArray( 2019 length, dex_pc, type_index, *dex_compilation_unit_->GetDexFile(), entrypoint)); 2020 UpdateLocal(instruction.VRegA_22c(), current_block_->GetLastInstruction()); 2021 break; 2022 } 2023 2024 case Instruction::FILLED_NEW_ARRAY: { 2025 uint32_t number_of_vreg_arguments = instruction.VRegA_35c(); 2026 uint32_t type_index = instruction.VRegB_35c(); 2027 uint32_t args[5]; 2028 instruction.GetVarArgs(args); 2029 BuildFilledNewArray(dex_pc, type_index, number_of_vreg_arguments, false, args, 0); 2030 break; 2031 } 2032 2033 case Instruction::FILLED_NEW_ARRAY_RANGE: { 2034 uint32_t number_of_vreg_arguments = instruction.VRegA_3rc(); 2035 uint32_t type_index = instruction.VRegB_3rc(); 2036 uint32_t register_index = instruction.VRegC_3rc(); 2037 BuildFilledNewArray( 2038 dex_pc, type_index, number_of_vreg_arguments, true, nullptr, register_index); 2039 break; 2040 } 2041 2042 case Instruction::FILL_ARRAY_DATA: { 2043 BuildFillArrayData(instruction, dex_pc); 2044 break; 2045 } 2046 2047 case Instruction::MOVE_RESULT: 2048 case Instruction::MOVE_RESULT_WIDE: 2049 case Instruction::MOVE_RESULT_OBJECT: 2050 UpdateLocal(instruction.VRegA(), latest_result_); 2051 latest_result_ = nullptr; 2052 break; 2053 2054 case Instruction::CMP_LONG: { 2055 Binop_23x_cmp(instruction, Primitive::kPrimLong, HCompare::kNoBias); 2056 break; 2057 } 2058 2059 case Instruction::CMPG_FLOAT: { 2060 Binop_23x_cmp(instruction, Primitive::kPrimFloat, HCompare::kGtBias); 2061 break; 2062 } 2063 2064 case Instruction::CMPG_DOUBLE: { 2065 Binop_23x_cmp(instruction, Primitive::kPrimDouble, HCompare::kGtBias); 2066 break; 2067 } 2068 2069 case Instruction::CMPL_FLOAT: { 2070 Binop_23x_cmp(instruction, Primitive::kPrimFloat, HCompare::kLtBias); 2071 break; 2072 } 2073 2074 case Instruction::CMPL_DOUBLE: { 2075 Binop_23x_cmp(instruction, Primitive::kPrimDouble, HCompare::kLtBias); 2076 break; 2077 } 2078 2079 case Instruction::NOP: 2080 break; 2081 2082 case Instruction::IGET: 2083 case Instruction::IGET_WIDE: 2084 case Instruction::IGET_OBJECT: 2085 case Instruction::IGET_BOOLEAN: 2086 case Instruction::IGET_BYTE: 2087 case Instruction::IGET_CHAR: 2088 case Instruction::IGET_SHORT: { 2089 if (!BuildInstanceFieldAccess(instruction, dex_pc, false)) { 2090 return false; 2091 } 2092 break; 2093 } 2094 2095 case Instruction::IPUT: 2096 case Instruction::IPUT_WIDE: 2097 case Instruction::IPUT_OBJECT: 2098 case Instruction::IPUT_BOOLEAN: 2099 case Instruction::IPUT_BYTE: 2100 case Instruction::IPUT_CHAR: 2101 case Instruction::IPUT_SHORT: { 2102 if (!BuildInstanceFieldAccess(instruction, dex_pc, true)) { 2103 return false; 2104 } 2105 break; 2106 } 2107 2108 case Instruction::SGET: 2109 case Instruction::SGET_WIDE: 2110 case Instruction::SGET_OBJECT: 2111 case Instruction::SGET_BOOLEAN: 2112 case Instruction::SGET_BYTE: 2113 case Instruction::SGET_CHAR: 2114 case Instruction::SGET_SHORT: { 2115 if (!BuildStaticFieldAccess(instruction, dex_pc, false)) { 2116 return false; 2117 } 2118 break; 2119 } 2120 2121 case Instruction::SPUT: 2122 case Instruction::SPUT_WIDE: 2123 case Instruction::SPUT_OBJECT: 2124 case Instruction::SPUT_BOOLEAN: 2125 case Instruction::SPUT_BYTE: 2126 case Instruction::SPUT_CHAR: 2127 case Instruction::SPUT_SHORT: { 2128 if (!BuildStaticFieldAccess(instruction, dex_pc, true)) { 2129 return false; 2130 } 2131 break; 2132 } 2133 2134#define ARRAY_XX(kind, anticipated_type) \ 2135 case Instruction::AGET##kind: { \ 2136 BuildArrayAccess(instruction, dex_pc, false, anticipated_type); \ 2137 break; \ 2138 } \ 2139 case Instruction::APUT##kind: { \ 2140 BuildArrayAccess(instruction, dex_pc, true, anticipated_type); \ 2141 break; \ 2142 } 2143 2144 ARRAY_XX(, Primitive::kPrimInt); 2145 ARRAY_XX(_WIDE, Primitive::kPrimLong); 2146 ARRAY_XX(_OBJECT, Primitive::kPrimNot); 2147 ARRAY_XX(_BOOLEAN, Primitive::kPrimBoolean); 2148 ARRAY_XX(_BYTE, Primitive::kPrimByte); 2149 ARRAY_XX(_CHAR, Primitive::kPrimChar); 2150 ARRAY_XX(_SHORT, Primitive::kPrimShort); 2151 2152 case Instruction::ARRAY_LENGTH: { 2153 HInstruction* object = LoadLocal(instruction.VRegB_12x(), Primitive::kPrimNot); 2154 // No need for a temporary for the null check, it is the only input of the following 2155 // instruction. 2156 object = new (arena_) HNullCheck(object, dex_pc); 2157 current_block_->AddInstruction(object); 2158 current_block_->AddInstruction(new (arena_) HArrayLength(object)); 2159 UpdateLocal(instruction.VRegA_12x(), current_block_->GetLastInstruction()); 2160 break; 2161 } 2162 2163 case Instruction::CONST_STRING: { 2164 current_block_->AddInstruction( 2165 new (arena_) HLoadString(graph_->GetCurrentMethod(), instruction.VRegB_21c(), dex_pc)); 2166 UpdateLocal(instruction.VRegA_21c(), current_block_->GetLastInstruction()); 2167 break; 2168 } 2169 2170 case Instruction::CONST_STRING_JUMBO: { 2171 current_block_->AddInstruction( 2172 new (arena_) HLoadString(graph_->GetCurrentMethod(), instruction.VRegB_31c(), dex_pc)); 2173 UpdateLocal(instruction.VRegA_31c(), current_block_->GetLastInstruction()); 2174 break; 2175 } 2176 2177 case Instruction::CONST_CLASS: { 2178 uint16_t type_index = instruction.VRegB_21c(); 2179 bool type_known_final; 2180 bool type_known_abstract; 2181 bool dont_use_is_referrers_class; 2182 // `CanAccessTypeWithoutChecks` will tell whether the method being 2183 // built is trying to access its own class, so that the generated 2184 // code can optimize for this case. However, the optimization does not 2185 // work for inlining, so we use `IsOutermostCompilingClass` instead. 2186 bool can_access = compiler_driver_->CanAccessTypeWithoutChecks( 2187 dex_compilation_unit_->GetDexMethodIndex(), *dex_file_, type_index, 2188 &type_known_final, &type_known_abstract, &dont_use_is_referrers_class); 2189 if (!can_access) { 2190 MaybeRecordStat(MethodCompilationStat::kNotCompiledCantAccesType); 2191 return false; 2192 } 2193 current_block_->AddInstruction(new (arena_) HLoadClass( 2194 graph_->GetCurrentMethod(), 2195 type_index, 2196 *dex_compilation_unit_->GetDexFile(), 2197 IsOutermostCompilingClass(type_index), 2198 dex_pc)); 2199 UpdateLocal(instruction.VRegA_21c(), current_block_->GetLastInstruction()); 2200 break; 2201 } 2202 2203 case Instruction::MOVE_EXCEPTION: { 2204 current_block_->AddInstruction(new (arena_) HLoadException()); 2205 UpdateLocal(instruction.VRegA_11x(), current_block_->GetLastInstruction()); 2206 break; 2207 } 2208 2209 case Instruction::THROW: { 2210 HInstruction* exception = LoadLocal(instruction.VRegA_11x(), Primitive::kPrimNot); 2211 current_block_->AddInstruction(new (arena_) HThrow(exception, dex_pc)); 2212 // A throw instruction must branch to the exit block. 2213 current_block_->AddSuccessor(exit_block_); 2214 // We finished building this block. Set the current block to null to avoid 2215 // adding dead instructions to it. 2216 current_block_ = nullptr; 2217 break; 2218 } 2219 2220 case Instruction::INSTANCE_OF: { 2221 uint8_t destination = instruction.VRegA_22c(); 2222 uint8_t reference = instruction.VRegB_22c(); 2223 uint16_t type_index = instruction.VRegC_22c(); 2224 if (!BuildTypeCheck(instruction, destination, reference, type_index, dex_pc)) { 2225 return false; 2226 } 2227 break; 2228 } 2229 2230 case Instruction::CHECK_CAST: { 2231 uint8_t reference = instruction.VRegA_21c(); 2232 uint16_t type_index = instruction.VRegB_21c(); 2233 if (!BuildTypeCheck(instruction, -1, reference, type_index, dex_pc)) { 2234 return false; 2235 } 2236 break; 2237 } 2238 2239 case Instruction::MONITOR_ENTER: { 2240 current_block_->AddInstruction(new (arena_) HMonitorOperation( 2241 LoadLocal(instruction.VRegA_11x(), Primitive::kPrimNot), 2242 HMonitorOperation::kEnter, 2243 dex_pc)); 2244 break; 2245 } 2246 2247 case Instruction::MONITOR_EXIT: { 2248 current_block_->AddInstruction(new (arena_) HMonitorOperation( 2249 LoadLocal(instruction.VRegA_11x(), Primitive::kPrimNot), 2250 HMonitorOperation::kExit, 2251 dex_pc)); 2252 break; 2253 } 2254 2255 case Instruction::PACKED_SWITCH: { 2256 BuildPackedSwitch(instruction, dex_pc); 2257 break; 2258 } 2259 2260 case Instruction::SPARSE_SWITCH: { 2261 BuildSparseSwitch(instruction, dex_pc); 2262 break; 2263 } 2264 2265 default: 2266 VLOG(compiler) << "Did not compile " 2267 << PrettyMethod(dex_compilation_unit_->GetDexMethodIndex(), *dex_file_) 2268 << " because of unhandled instruction " 2269 << instruction.Name(); 2270 MaybeRecordStat(MethodCompilationStat::kNotCompiledUnhandledInstruction); 2271 return false; 2272 } 2273 return true; 2274} // NOLINT(readability/fn_size) 2275 2276HLocal* HGraphBuilder::GetLocalAt(int register_index) const { 2277 return locals_.Get(register_index); 2278} 2279 2280void HGraphBuilder::UpdateLocal(int register_index, HInstruction* instruction) const { 2281 HLocal* local = GetLocalAt(register_index); 2282 current_block_->AddInstruction(new (arena_) HStoreLocal(local, instruction)); 2283} 2284 2285HInstruction* HGraphBuilder::LoadLocal(int register_index, Primitive::Type type) const { 2286 HLocal* local = GetLocalAt(register_index); 2287 current_block_->AddInstruction(new (arena_) HLoadLocal(local, type)); 2288 return current_block_->GetLastInstruction(); 2289} 2290 2291} // namespace art 2292