Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1 | // Copyright 2012 the V8 project authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
| 4 | |
| 5 | #include "src/v8.h" |
| 6 | |
| 7 | #include "src/bailout-reason.h" |
| 8 | #include "src/code-stubs.h" |
| 9 | #include "src/field-index.h" |
| 10 | #include "src/hydrogen.h" |
| 11 | #include "src/lithium.h" |
| 12 | |
| 13 | namespace v8 { |
| 14 | namespace internal { |
| 15 | |
| 16 | |
| 17 | static LChunk* OptimizeGraph(HGraph* graph) { |
| 18 | DisallowHeapAllocation no_allocation; |
| 19 | DisallowHandleAllocation no_handles; |
| 20 | DisallowHandleDereference no_deref; |
| 21 | |
| 22 | DCHECK(graph != NULL); |
| 23 | BailoutReason bailout_reason = kNoReason; |
| 24 | if (!graph->Optimize(&bailout_reason)) { |
| 25 | FATAL(GetBailoutReason(bailout_reason)); |
| 26 | } |
| 27 | LChunk* chunk = LChunk::NewChunk(graph); |
| 28 | if (chunk == NULL) { |
| 29 | FATAL(GetBailoutReason(graph->info()->bailout_reason())); |
| 30 | } |
| 31 | return chunk; |
| 32 | } |
| 33 | |
| 34 | |
| 35 | class CodeStubGraphBuilderBase : public HGraphBuilder { |
| 36 | public: |
| 37 | CodeStubGraphBuilderBase(Isolate* isolate, HydrogenCodeStub* stub) |
| 38 | : HGraphBuilder(&info_), |
| 39 | arguments_length_(NULL), |
| 40 | info_(stub, isolate), |
| 41 | descriptor_(stub), |
| 42 | context_(NULL) { |
| 43 | int parameter_count = descriptor_.GetEnvironmentParameterCount(); |
| 44 | parameters_.Reset(new HParameter*[parameter_count]); |
| 45 | } |
| 46 | virtual bool BuildGraph(); |
| 47 | |
| 48 | protected: |
| 49 | virtual HValue* BuildCodeStub() = 0; |
| 50 | HParameter* GetParameter(int parameter) { |
| 51 | DCHECK(parameter < descriptor_.GetEnvironmentParameterCount()); |
| 52 | return parameters_[parameter]; |
| 53 | } |
| 54 | HValue* GetArgumentsLength() { |
| 55 | // This is initialized in BuildGraph() |
| 56 | DCHECK(arguments_length_ != NULL); |
| 57 | return arguments_length_; |
| 58 | } |
| 59 | CompilationInfo* info() { return &info_; } |
| 60 | HydrogenCodeStub* stub() { return info_.code_stub(); } |
| 61 | HContext* context() { return context_; } |
| 62 | Isolate* isolate() { return info_.isolate(); } |
| 63 | |
| 64 | HLoadNamedField* BuildLoadNamedField(HValue* object, |
| 65 | FieldIndex index); |
| 66 | void BuildStoreNamedField(HValue* object, HValue* value, FieldIndex index, |
| 67 | Representation representation); |
| 68 | |
| 69 | enum ArgumentClass { |
| 70 | NONE, |
| 71 | SINGLE, |
| 72 | MULTIPLE |
| 73 | }; |
| 74 | |
| 75 | HValue* UnmappedCase(HValue* elements, HValue* key); |
| 76 | |
| 77 | HValue* BuildArrayConstructor(ElementsKind kind, |
| 78 | AllocationSiteOverrideMode override_mode, |
| 79 | ArgumentClass argument_class); |
| 80 | HValue* BuildInternalArrayConstructor(ElementsKind kind, |
| 81 | ArgumentClass argument_class); |
| 82 | |
| 83 | // BuildCheckAndInstallOptimizedCode emits code to install the optimized |
| 84 | // function found in the optimized code map at map_index in js_function, if |
| 85 | // the function at map_index matches the given native_context. Builder is |
| 86 | // left in the "Then()" state after the install. |
| 87 | void BuildCheckAndInstallOptimizedCode(HValue* js_function, |
| 88 | HValue* native_context, |
| 89 | IfBuilder* builder, |
| 90 | HValue* optimized_map, |
| 91 | HValue* map_index); |
| 92 | void BuildInstallCode(HValue* js_function, HValue* shared_info); |
| 93 | |
| 94 | HInstruction* LoadFromOptimizedCodeMap(HValue* optimized_map, |
| 95 | HValue* iterator, |
| 96 | int field_offset); |
| 97 | void BuildInstallFromOptimizedCodeMap(HValue* js_function, |
| 98 | HValue* shared_info, |
| 99 | HValue* native_context); |
| 100 | |
| 101 | private: |
| 102 | HValue* BuildArraySingleArgumentConstructor(JSArrayBuilder* builder); |
| 103 | HValue* BuildArrayNArgumentsConstructor(JSArrayBuilder* builder, |
| 104 | ElementsKind kind); |
| 105 | |
| 106 | SmartArrayPointer<HParameter*> parameters_; |
| 107 | HValue* arguments_length_; |
| 108 | CompilationInfoWithZone info_; |
| 109 | CodeStubDescriptor descriptor_; |
| 110 | HContext* context_; |
| 111 | }; |
| 112 | |
| 113 | |
| 114 | bool CodeStubGraphBuilderBase::BuildGraph() { |
| 115 | // Update the static counter each time a new code stub is generated. |
| 116 | isolate()->counters()->code_stubs()->Increment(); |
| 117 | |
| 118 | if (FLAG_trace_hydrogen_stubs) { |
| 119 | const char* name = CodeStub::MajorName(stub()->MajorKey(), false); |
| 120 | PrintF("-----------------------------------------------------------\n"); |
| 121 | PrintF("Compiling stub %s using hydrogen\n", name); |
| 122 | isolate()->GetHTracer()->TraceCompilation(&info_); |
| 123 | } |
| 124 | |
| 125 | int param_count = descriptor_.GetEnvironmentParameterCount(); |
| 126 | HEnvironment* start_environment = graph()->start_environment(); |
| 127 | HBasicBlock* next_block = CreateBasicBlock(start_environment); |
| 128 | Goto(next_block); |
| 129 | next_block->SetJoinId(BailoutId::StubEntry()); |
| 130 | set_current_block(next_block); |
| 131 | |
| 132 | bool runtime_stack_params = descriptor_.stack_parameter_count().is_valid(); |
| 133 | HInstruction* stack_parameter_count = NULL; |
| 134 | for (int i = 0; i < param_count; ++i) { |
| 135 | Representation r = descriptor_.GetEnvironmentParameterRepresentation(i); |
| 136 | HParameter* param = Add<HParameter>(i, |
| 137 | HParameter::REGISTER_PARAMETER, r); |
| 138 | start_environment->Bind(i, param); |
| 139 | parameters_[i] = param; |
| 140 | if (descriptor_.IsEnvironmentParameterCountRegister(i)) { |
| 141 | param->set_type(HType::Smi()); |
| 142 | stack_parameter_count = param; |
| 143 | arguments_length_ = stack_parameter_count; |
| 144 | } |
| 145 | } |
| 146 | |
| 147 | DCHECK(!runtime_stack_params || arguments_length_ != NULL); |
| 148 | if (!runtime_stack_params) { |
| 149 | stack_parameter_count = graph()->GetConstantMinus1(); |
| 150 | arguments_length_ = graph()->GetConstant0(); |
| 151 | } |
| 152 | |
| 153 | context_ = Add<HContext>(); |
| 154 | start_environment->BindContext(context_); |
| 155 | |
| 156 | Add<HSimulate>(BailoutId::StubEntry()); |
| 157 | |
| 158 | NoObservableSideEffectsScope no_effects(this); |
| 159 | |
| 160 | HValue* return_value = BuildCodeStub(); |
| 161 | |
| 162 | // We might have extra expressions to pop from the stack in addition to the |
| 163 | // arguments above. |
| 164 | HInstruction* stack_pop_count = stack_parameter_count; |
| 165 | if (descriptor_.function_mode() == JS_FUNCTION_STUB_MODE) { |
| 166 | if (!stack_parameter_count->IsConstant() && |
| 167 | descriptor_.hint_stack_parameter_count() < 0) { |
| 168 | HInstruction* constant_one = graph()->GetConstant1(); |
| 169 | stack_pop_count = AddUncasted<HAdd>(stack_parameter_count, constant_one); |
| 170 | stack_pop_count->ClearFlag(HValue::kCanOverflow); |
| 171 | // TODO(mvstanton): verify that stack_parameter_count+1 really fits in a |
| 172 | // smi. |
| 173 | } else { |
| 174 | int count = descriptor_.hint_stack_parameter_count(); |
| 175 | stack_pop_count = Add<HConstant>(count); |
| 176 | } |
| 177 | } |
| 178 | |
| 179 | if (current_block() != NULL) { |
| 180 | HReturn* hreturn_instruction = New<HReturn>(return_value, |
| 181 | stack_pop_count); |
| 182 | FinishCurrentBlock(hreturn_instruction); |
| 183 | } |
| 184 | return true; |
| 185 | } |
| 186 | |
| 187 | |
| 188 | template <class Stub> |
| 189 | class CodeStubGraphBuilder: public CodeStubGraphBuilderBase { |
| 190 | public: |
| 191 | CodeStubGraphBuilder(Isolate* isolate, Stub* stub) |
| 192 | : CodeStubGraphBuilderBase(isolate, stub) {} |
| 193 | |
| 194 | protected: |
| 195 | virtual HValue* BuildCodeStub() { |
| 196 | if (casted_stub()->IsUninitialized()) { |
| 197 | return BuildCodeUninitializedStub(); |
| 198 | } else { |
| 199 | return BuildCodeInitializedStub(); |
| 200 | } |
| 201 | } |
| 202 | |
| 203 | virtual HValue* BuildCodeInitializedStub() { |
| 204 | UNIMPLEMENTED(); |
| 205 | return NULL; |
| 206 | } |
| 207 | |
| 208 | virtual HValue* BuildCodeUninitializedStub() { |
| 209 | // Force a deopt that falls back to the runtime. |
| 210 | HValue* undefined = graph()->GetConstantUndefined(); |
| 211 | IfBuilder builder(this); |
| 212 | builder.IfNot<HCompareObjectEqAndBranch, HValue*>(undefined, undefined); |
| 213 | builder.Then(); |
| 214 | builder.ElseDeopt("Forced deopt to runtime"); |
| 215 | return undefined; |
| 216 | } |
| 217 | |
| 218 | Stub* casted_stub() { return static_cast<Stub*>(stub()); } |
| 219 | }; |
| 220 | |
| 221 | |
| 222 | Handle<Code> HydrogenCodeStub::GenerateLightweightMissCode( |
| 223 | ExternalReference miss) { |
| 224 | Factory* factory = isolate()->factory(); |
| 225 | |
| 226 | // Generate the new code. |
| 227 | MacroAssembler masm(isolate(), NULL, 256); |
| 228 | |
| 229 | { |
| 230 | // Update the static counter each time a new code stub is generated. |
| 231 | isolate()->counters()->code_stubs()->Increment(); |
| 232 | |
| 233 | // Generate the code for the stub. |
| 234 | masm.set_generating_stub(true); |
| 235 | NoCurrentFrameScope scope(&masm); |
| 236 | GenerateLightweightMiss(&masm, miss); |
| 237 | } |
| 238 | |
| 239 | // Create the code object. |
| 240 | CodeDesc desc; |
| 241 | masm.GetCode(&desc); |
| 242 | |
| 243 | // Copy the generated code into a heap object. |
| 244 | Code::Flags flags = Code::ComputeFlags( |
| 245 | GetCodeKind(), |
| 246 | GetICState(), |
| 247 | GetExtraICState(), |
| 248 | GetStubType()); |
| 249 | Handle<Code> new_object = factory->NewCode( |
| 250 | desc, flags, masm.CodeObject(), NeedsImmovableCode()); |
| 251 | return new_object; |
| 252 | } |
| 253 | |
| 254 | |
| 255 | template <class Stub> |
| 256 | static Handle<Code> DoGenerateCode(Stub* stub) { |
| 257 | Isolate* isolate = stub->isolate(); |
| 258 | CodeStubDescriptor descriptor(stub); |
| 259 | |
| 260 | // If we are uninitialized we can use a light-weight stub to enter |
| 261 | // the runtime that is significantly faster than using the standard |
| 262 | // stub-failure deopt mechanism. |
| 263 | if (stub->IsUninitialized() && descriptor.has_miss_handler()) { |
| 264 | DCHECK(!descriptor.stack_parameter_count().is_valid()); |
| 265 | return stub->GenerateLightweightMissCode(descriptor.miss_handler()); |
| 266 | } |
| 267 | base::ElapsedTimer timer; |
| 268 | if (FLAG_profile_hydrogen_code_stub_compilation) { |
| 269 | timer.Start(); |
| 270 | } |
| 271 | CodeStubGraphBuilder<Stub> builder(isolate, stub); |
| 272 | LChunk* chunk = OptimizeGraph(builder.CreateGraph()); |
| 273 | // TODO(yangguo) remove this once the code serializer handles code stubs. |
| 274 | if (FLAG_serialize_toplevel) chunk->info()->PrepareForSerializing(); |
| 275 | Handle<Code> code = chunk->Codegen(); |
| 276 | if (FLAG_profile_hydrogen_code_stub_compilation) { |
| 277 | OFStream os(stdout); |
| 278 | os << "[Lazy compilation of " << stub << " took " |
| 279 | << timer.Elapsed().InMillisecondsF() << " ms]" << endl; |
| 280 | } |
| 281 | return code; |
| 282 | } |
| 283 | |
| 284 | |
| 285 | template <> |
| 286 | HValue* CodeStubGraphBuilder<ToNumberStub>::BuildCodeStub() { |
| 287 | HValue* value = GetParameter(0); |
| 288 | |
| 289 | // Check if the parameter is already a SMI or heap number. |
| 290 | IfBuilder if_number(this); |
| 291 | if_number.If<HIsSmiAndBranch>(value); |
| 292 | if_number.OrIf<HCompareMap>(value, isolate()->factory()->heap_number_map()); |
| 293 | if_number.Then(); |
| 294 | |
| 295 | // Return the number. |
| 296 | Push(value); |
| 297 | |
| 298 | if_number.Else(); |
| 299 | |
| 300 | // Convert the parameter to number using the builtin. |
| 301 | HValue* function = AddLoadJSBuiltin(Builtins::TO_NUMBER); |
| 302 | Add<HPushArguments>(value); |
| 303 | Push(Add<HInvokeFunction>(function, 1)); |
| 304 | |
| 305 | if_number.End(); |
| 306 | |
| 307 | return Pop(); |
| 308 | } |
| 309 | |
| 310 | |
| 311 | Handle<Code> ToNumberStub::GenerateCode() { |
| 312 | return DoGenerateCode(this); |
| 313 | } |
| 314 | |
| 315 | |
| 316 | template <> |
| 317 | HValue* CodeStubGraphBuilder<NumberToStringStub>::BuildCodeStub() { |
| 318 | info()->MarkAsSavesCallerDoubles(); |
| 319 | HValue* number = GetParameter(NumberToStringStub::kNumber); |
| 320 | return BuildNumberToString(number, Type::Number(zone())); |
| 321 | } |
| 322 | |
| 323 | |
| 324 | Handle<Code> NumberToStringStub::GenerateCode() { |
| 325 | return DoGenerateCode(this); |
| 326 | } |
| 327 | |
| 328 | |
| 329 | template <> |
| 330 | HValue* CodeStubGraphBuilder<FastCloneShallowArrayStub>::BuildCodeStub() { |
| 331 | Factory* factory = isolate()->factory(); |
| 332 | HValue* undefined = graph()->GetConstantUndefined(); |
| 333 | AllocationSiteMode alloc_site_mode = casted_stub()->allocation_site_mode(); |
| 334 | |
| 335 | // This stub is very performance sensitive, the generated code must be tuned |
| 336 | // so that it doesn't build and eager frame. |
| 337 | info()->MarkMustNotHaveEagerFrame(); |
| 338 | |
| 339 | HInstruction* allocation_site = Add<HLoadKeyed>(GetParameter(0), |
| 340 | GetParameter(1), |
| 341 | static_cast<HValue*>(NULL), |
| 342 | FAST_ELEMENTS); |
| 343 | IfBuilder checker(this); |
| 344 | checker.IfNot<HCompareObjectEqAndBranch, HValue*>(allocation_site, |
| 345 | undefined); |
| 346 | checker.Then(); |
| 347 | |
| 348 | HObjectAccess access = HObjectAccess::ForAllocationSiteOffset( |
| 349 | AllocationSite::kTransitionInfoOffset); |
| 350 | HInstruction* boilerplate = Add<HLoadNamedField>( |
| 351 | allocation_site, static_cast<HValue*>(NULL), access); |
| 352 | HValue* elements = AddLoadElements(boilerplate); |
| 353 | HValue* capacity = AddLoadFixedArrayLength(elements); |
| 354 | IfBuilder zero_capacity(this); |
| 355 | zero_capacity.If<HCompareNumericAndBranch>(capacity, graph()->GetConstant0(), |
| 356 | Token::EQ); |
| 357 | zero_capacity.Then(); |
| 358 | Push(BuildCloneShallowArrayEmpty(boilerplate, |
| 359 | allocation_site, |
| 360 | alloc_site_mode)); |
| 361 | zero_capacity.Else(); |
| 362 | IfBuilder if_fixed_cow(this); |
| 363 | if_fixed_cow.If<HCompareMap>(elements, factory->fixed_cow_array_map()); |
| 364 | if_fixed_cow.Then(); |
| 365 | Push(BuildCloneShallowArrayCow(boilerplate, |
| 366 | allocation_site, |
| 367 | alloc_site_mode, |
| 368 | FAST_ELEMENTS)); |
| 369 | if_fixed_cow.Else(); |
| 370 | IfBuilder if_fixed(this); |
| 371 | if_fixed.If<HCompareMap>(elements, factory->fixed_array_map()); |
| 372 | if_fixed.Then(); |
| 373 | Push(BuildCloneShallowArrayNonEmpty(boilerplate, |
| 374 | allocation_site, |
| 375 | alloc_site_mode, |
| 376 | FAST_ELEMENTS)); |
| 377 | |
| 378 | if_fixed.Else(); |
| 379 | Push(BuildCloneShallowArrayNonEmpty(boilerplate, |
| 380 | allocation_site, |
| 381 | alloc_site_mode, |
| 382 | FAST_DOUBLE_ELEMENTS)); |
| 383 | if_fixed.End(); |
| 384 | if_fixed_cow.End(); |
| 385 | zero_capacity.End(); |
| 386 | |
| 387 | checker.ElseDeopt("Uninitialized boilerplate literals"); |
| 388 | checker.End(); |
| 389 | |
| 390 | return environment()->Pop(); |
| 391 | } |
| 392 | |
| 393 | |
| 394 | Handle<Code> FastCloneShallowArrayStub::GenerateCode() { |
| 395 | return DoGenerateCode(this); |
| 396 | } |
| 397 | |
| 398 | |
| 399 | template <> |
| 400 | HValue* CodeStubGraphBuilder<FastCloneShallowObjectStub>::BuildCodeStub() { |
| 401 | HValue* undefined = graph()->GetConstantUndefined(); |
| 402 | |
| 403 | HInstruction* allocation_site = Add<HLoadKeyed>(GetParameter(0), |
| 404 | GetParameter(1), |
| 405 | static_cast<HValue*>(NULL), |
| 406 | FAST_ELEMENTS); |
| 407 | |
| 408 | IfBuilder checker(this); |
| 409 | checker.IfNot<HCompareObjectEqAndBranch, HValue*>(allocation_site, |
| 410 | undefined); |
| 411 | checker.And(); |
| 412 | |
| 413 | HObjectAccess access = HObjectAccess::ForAllocationSiteOffset( |
| 414 | AllocationSite::kTransitionInfoOffset); |
| 415 | HInstruction* boilerplate = Add<HLoadNamedField>( |
| 416 | allocation_site, static_cast<HValue*>(NULL), access); |
| 417 | |
| 418 | int size = JSObject::kHeaderSize + casted_stub()->length() * kPointerSize; |
| 419 | int object_size = size; |
| 420 | if (FLAG_allocation_site_pretenuring) { |
| 421 | size += AllocationMemento::kSize; |
| 422 | } |
| 423 | |
| 424 | HValue* boilerplate_map = Add<HLoadNamedField>( |
| 425 | boilerplate, static_cast<HValue*>(NULL), |
| 426 | HObjectAccess::ForMap()); |
| 427 | HValue* boilerplate_size = Add<HLoadNamedField>( |
| 428 | boilerplate_map, static_cast<HValue*>(NULL), |
| 429 | HObjectAccess::ForMapInstanceSize()); |
| 430 | HValue* size_in_words = Add<HConstant>(object_size >> kPointerSizeLog2); |
| 431 | checker.If<HCompareNumericAndBranch>(boilerplate_size, |
| 432 | size_in_words, Token::EQ); |
| 433 | checker.Then(); |
| 434 | |
| 435 | HValue* size_in_bytes = Add<HConstant>(size); |
| 436 | |
| 437 | HInstruction* object = Add<HAllocate>(size_in_bytes, HType::JSObject(), |
| 438 | NOT_TENURED, JS_OBJECT_TYPE); |
| 439 | |
| 440 | for (int i = 0; i < object_size; i += kPointerSize) { |
| 441 | HObjectAccess access = HObjectAccess::ForObservableJSObjectOffset(i); |
| 442 | Add<HStoreNamedField>( |
| 443 | object, access, Add<HLoadNamedField>( |
| 444 | boilerplate, static_cast<HValue*>(NULL), access)); |
| 445 | } |
| 446 | |
| 447 | DCHECK(FLAG_allocation_site_pretenuring || (size == object_size)); |
| 448 | if (FLAG_allocation_site_pretenuring) { |
| 449 | BuildCreateAllocationMemento( |
| 450 | object, Add<HConstant>(object_size), allocation_site); |
| 451 | } |
| 452 | |
| 453 | environment()->Push(object); |
| 454 | checker.ElseDeopt("Uninitialized boilerplate in fast clone"); |
| 455 | checker.End(); |
| 456 | |
| 457 | return environment()->Pop(); |
| 458 | } |
| 459 | |
| 460 | |
| 461 | Handle<Code> FastCloneShallowObjectStub::GenerateCode() { |
| 462 | return DoGenerateCode(this); |
| 463 | } |
| 464 | |
| 465 | |
| 466 | template <> |
| 467 | HValue* CodeStubGraphBuilder<CreateAllocationSiteStub>::BuildCodeStub() { |
| 468 | HValue* size = Add<HConstant>(AllocationSite::kSize); |
| 469 | HInstruction* object = Add<HAllocate>(size, HType::JSObject(), TENURED, |
| 470 | JS_OBJECT_TYPE); |
| 471 | |
| 472 | // Store the map |
| 473 | Handle<Map> allocation_site_map = isolate()->factory()->allocation_site_map(); |
| 474 | AddStoreMapConstant(object, allocation_site_map); |
| 475 | |
| 476 | // Store the payload (smi elements kind) |
| 477 | HValue* initial_elements_kind = Add<HConstant>(GetInitialFastElementsKind()); |
| 478 | Add<HStoreNamedField>(object, |
| 479 | HObjectAccess::ForAllocationSiteOffset( |
| 480 | AllocationSite::kTransitionInfoOffset), |
| 481 | initial_elements_kind); |
| 482 | |
| 483 | // Unlike literals, constructed arrays don't have nested sites |
| 484 | Add<HStoreNamedField>(object, |
| 485 | HObjectAccess::ForAllocationSiteOffset( |
| 486 | AllocationSite::kNestedSiteOffset), |
| 487 | graph()->GetConstant0()); |
| 488 | |
| 489 | // Pretenuring calculation field. |
| 490 | Add<HStoreNamedField>(object, |
| 491 | HObjectAccess::ForAllocationSiteOffset( |
| 492 | AllocationSite::kPretenureDataOffset), |
| 493 | graph()->GetConstant0()); |
| 494 | |
| 495 | // Pretenuring memento creation count field. |
| 496 | Add<HStoreNamedField>(object, |
| 497 | HObjectAccess::ForAllocationSiteOffset( |
| 498 | AllocationSite::kPretenureCreateCountOffset), |
| 499 | graph()->GetConstant0()); |
| 500 | |
| 501 | // Store an empty fixed array for the code dependency. |
| 502 | HConstant* empty_fixed_array = |
| 503 | Add<HConstant>(isolate()->factory()->empty_fixed_array()); |
| 504 | Add<HStoreNamedField>( |
| 505 | object, |
| 506 | HObjectAccess::ForAllocationSiteOffset( |
| 507 | AllocationSite::kDependentCodeOffset), |
| 508 | empty_fixed_array); |
| 509 | |
| 510 | // Link the object to the allocation site list |
| 511 | HValue* site_list = Add<HConstant>( |
| 512 | ExternalReference::allocation_sites_list_address(isolate())); |
| 513 | HValue* site = Add<HLoadNamedField>( |
| 514 | site_list, static_cast<HValue*>(NULL), |
| 515 | HObjectAccess::ForAllocationSiteList()); |
| 516 | // TODO(mvstanton): This is a store to a weak pointer, which we may want to |
| 517 | // mark as such in order to skip the write barrier, once we have a unified |
| 518 | // system for weakness. For now we decided to keep it like this because having |
| 519 | // an initial write barrier backed store makes this pointer strong until the |
| 520 | // next GC, and allocation sites are designed to survive several GCs anyway. |
| 521 | Add<HStoreNamedField>( |
| 522 | object, |
| 523 | HObjectAccess::ForAllocationSiteOffset(AllocationSite::kWeakNextOffset), |
| 524 | site); |
| 525 | Add<HStoreNamedField>(site_list, HObjectAccess::ForAllocationSiteList(), |
| 526 | object); |
| 527 | |
| 528 | HInstruction* feedback_vector = GetParameter(0); |
| 529 | HInstruction* slot = GetParameter(1); |
| 530 | Add<HStoreKeyed>(feedback_vector, slot, object, FAST_ELEMENTS, |
| 531 | INITIALIZING_STORE); |
| 532 | return feedback_vector; |
| 533 | } |
| 534 | |
| 535 | |
| 536 | Handle<Code> CreateAllocationSiteStub::GenerateCode() { |
| 537 | return DoGenerateCode(this); |
| 538 | } |
| 539 | |
| 540 | |
| 541 | template <> |
| 542 | HValue* CodeStubGraphBuilder<LoadFastElementStub>::BuildCodeStub() { |
| 543 | HInstruction* load = BuildUncheckedMonomorphicElementAccess( |
| 544 | GetParameter(LoadDescriptor::kReceiverIndex), |
| 545 | GetParameter(LoadDescriptor::kNameIndex), NULL, |
| 546 | casted_stub()->is_js_array(), casted_stub()->elements_kind(), LOAD, |
| 547 | NEVER_RETURN_HOLE, STANDARD_STORE); |
| 548 | return load; |
| 549 | } |
| 550 | |
| 551 | |
| 552 | Handle<Code> LoadFastElementStub::GenerateCode() { |
| 553 | return DoGenerateCode(this); |
| 554 | } |
| 555 | |
| 556 | |
| 557 | HLoadNamedField* CodeStubGraphBuilderBase::BuildLoadNamedField( |
| 558 | HValue* object, FieldIndex index) { |
| 559 | Representation representation = index.is_double() |
| 560 | ? Representation::Double() |
| 561 | : Representation::Tagged(); |
| 562 | int offset = index.offset(); |
| 563 | HObjectAccess access = index.is_inobject() |
| 564 | ? HObjectAccess::ForObservableJSObjectOffset(offset, representation) |
| 565 | : HObjectAccess::ForBackingStoreOffset(offset, representation); |
| 566 | if (index.is_double()) { |
| 567 | // Load the heap number. |
| 568 | object = Add<HLoadNamedField>( |
| 569 | object, static_cast<HValue*>(NULL), |
| 570 | access.WithRepresentation(Representation::Tagged())); |
| 571 | // Load the double value from it. |
| 572 | access = HObjectAccess::ForHeapNumberValue(); |
| 573 | } |
| 574 | return Add<HLoadNamedField>(object, static_cast<HValue*>(NULL), access); |
| 575 | } |
| 576 | |
| 577 | |
| 578 | template<> |
| 579 | HValue* CodeStubGraphBuilder<LoadFieldStub>::BuildCodeStub() { |
| 580 | return BuildLoadNamedField(GetParameter(0), casted_stub()->index()); |
| 581 | } |
| 582 | |
| 583 | |
| 584 | Handle<Code> LoadFieldStub::GenerateCode() { |
| 585 | return DoGenerateCode(this); |
| 586 | } |
| 587 | |
| 588 | |
| 589 | template <> |
| 590 | HValue* CodeStubGraphBuilder<LoadConstantStub>::BuildCodeStub() { |
| 591 | HValue* map = AddLoadMap(GetParameter(0), NULL); |
| 592 | HObjectAccess descriptors_access = HObjectAccess::ForObservableJSObjectOffset( |
| 593 | Map::kDescriptorsOffset, Representation::Tagged()); |
| 594 | HValue* descriptors = |
| 595 | Add<HLoadNamedField>(map, static_cast<HValue*>(NULL), descriptors_access); |
| 596 | HObjectAccess value_access = HObjectAccess::ForObservableJSObjectOffset( |
| 597 | DescriptorArray::GetValueOffset(casted_stub()->constant_index())); |
| 598 | return Add<HLoadNamedField>(descriptors, static_cast<HValue*>(NULL), |
| 599 | value_access); |
| 600 | } |
| 601 | |
| 602 | |
| 603 | Handle<Code> LoadConstantStub::GenerateCode() { return DoGenerateCode(this); } |
| 604 | |
| 605 | |
| 606 | HValue* CodeStubGraphBuilderBase::UnmappedCase(HValue* elements, HValue* key) { |
| 607 | HValue* result; |
| 608 | HInstruction* backing_store = Add<HLoadKeyed>( |
| 609 | elements, graph()->GetConstant1(), static_cast<HValue*>(NULL), |
| 610 | FAST_ELEMENTS, ALLOW_RETURN_HOLE); |
| 611 | Add<HCheckMaps>(backing_store, isolate()->factory()->fixed_array_map()); |
| 612 | HValue* backing_store_length = |
| 613 | Add<HLoadNamedField>(backing_store, static_cast<HValue*>(NULL), |
| 614 | HObjectAccess::ForFixedArrayLength()); |
| 615 | IfBuilder in_unmapped_range(this); |
| 616 | in_unmapped_range.If<HCompareNumericAndBranch>(key, backing_store_length, |
| 617 | Token::LT); |
| 618 | in_unmapped_range.Then(); |
| 619 | { |
| 620 | result = Add<HLoadKeyed>(backing_store, key, static_cast<HValue*>(NULL), |
| 621 | FAST_HOLEY_ELEMENTS, NEVER_RETURN_HOLE); |
| 622 | } |
| 623 | in_unmapped_range.ElseDeopt("Outside of range"); |
| 624 | in_unmapped_range.End(); |
| 625 | return result; |
| 626 | } |
| 627 | |
| 628 | |
| 629 | template <> |
| 630 | HValue* CodeStubGraphBuilder<KeyedLoadSloppyArgumentsStub>::BuildCodeStub() { |
| 631 | HValue* receiver = GetParameter(LoadDescriptor::kReceiverIndex); |
| 632 | HValue* key = GetParameter(LoadDescriptor::kNameIndex); |
| 633 | |
| 634 | // Mapped arguments are actual arguments. Unmapped arguments are values added |
| 635 | // to the arguments object after it was created for the call. Mapped arguments |
| 636 | // are stored in the context at indexes given by elements[key + 2]. Unmapped |
| 637 | // arguments are stored as regular indexed properties in the arguments array, |
| 638 | // held at elements[1]. See NewSloppyArguments() in runtime.cc for a detailed |
| 639 | // look at argument object construction. |
| 640 | // |
| 641 | // The sloppy arguments elements array has a special format: |
| 642 | // |
| 643 | // 0: context |
| 644 | // 1: unmapped arguments array |
| 645 | // 2: mapped_index0, |
| 646 | // 3: mapped_index1, |
| 647 | // ... |
| 648 | // |
| 649 | // length is 2 + min(number_of_actual_arguments, number_of_formal_arguments). |
| 650 | // If key + 2 >= elements.length then attempt to look in the unmapped |
| 651 | // arguments array (given by elements[1]) and return the value at key, missing |
| 652 | // to the runtime if the unmapped arguments array is not a fixed array or if |
| 653 | // key >= unmapped_arguments_array.length. |
| 654 | // |
| 655 | // Otherwise, t = elements[key + 2]. If t is the hole, then look up the value |
| 656 | // in the unmapped arguments array, as described above. Otherwise, t is a Smi |
| 657 | // index into the context array given at elements[0]. Return the value at |
| 658 | // context[t]. |
| 659 | |
| 660 | key = AddUncasted<HForceRepresentation>(key, Representation::Smi()); |
| 661 | IfBuilder positive_smi(this); |
| 662 | positive_smi.If<HCompareNumericAndBranch>(key, graph()->GetConstant0(), |
| 663 | Token::LT); |
| 664 | positive_smi.ThenDeopt("key is negative"); |
| 665 | positive_smi.End(); |
| 666 | |
| 667 | HValue* constant_two = Add<HConstant>(2); |
| 668 | HValue* elements = AddLoadElements(receiver, static_cast<HValue*>(NULL)); |
| 669 | HValue* elements_length = |
| 670 | Add<HLoadNamedField>(elements, static_cast<HValue*>(NULL), |
| 671 | HObjectAccess::ForFixedArrayLength()); |
| 672 | HValue* adjusted_length = AddUncasted<HSub>(elements_length, constant_two); |
| 673 | IfBuilder in_range(this); |
| 674 | in_range.If<HCompareNumericAndBranch>(key, adjusted_length, Token::LT); |
| 675 | in_range.Then(); |
| 676 | { |
| 677 | HValue* index = AddUncasted<HAdd>(key, constant_two); |
| 678 | HInstruction* mapped_index = |
| 679 | Add<HLoadKeyed>(elements, index, static_cast<HValue*>(NULL), |
| 680 | FAST_HOLEY_ELEMENTS, ALLOW_RETURN_HOLE); |
| 681 | |
| 682 | IfBuilder is_valid(this); |
| 683 | is_valid.IfNot<HCompareObjectEqAndBranch>(mapped_index, |
| 684 | graph()->GetConstantHole()); |
| 685 | is_valid.Then(); |
| 686 | { |
| 687 | // TODO(mvstanton): I'd like to assert from this point, that if the |
| 688 | // mapped_index is not the hole that it is indeed, a smi. An unnecessary |
| 689 | // smi check is being emitted. |
| 690 | HValue* the_context = |
| 691 | Add<HLoadKeyed>(elements, graph()->GetConstant0(), |
| 692 | static_cast<HValue*>(NULL), FAST_ELEMENTS); |
| 693 | DCHECK(Context::kHeaderSize == FixedArray::kHeaderSize); |
| 694 | HValue* result = |
| 695 | Add<HLoadKeyed>(the_context, mapped_index, static_cast<HValue*>(NULL), |
| 696 | FAST_ELEMENTS, ALLOW_RETURN_HOLE); |
| 697 | environment()->Push(result); |
| 698 | } |
| 699 | is_valid.Else(); |
| 700 | { |
| 701 | HValue* result = UnmappedCase(elements, key); |
| 702 | environment()->Push(result); |
| 703 | } |
| 704 | is_valid.End(); |
| 705 | } |
| 706 | in_range.Else(); |
| 707 | { |
| 708 | HValue* result = UnmappedCase(elements, key); |
| 709 | environment()->Push(result); |
| 710 | } |
| 711 | in_range.End(); |
| 712 | |
| 713 | return environment()->Pop(); |
| 714 | } |
| 715 | |
| 716 | |
| 717 | Handle<Code> KeyedLoadSloppyArgumentsStub::GenerateCode() { |
| 718 | return DoGenerateCode(this); |
| 719 | } |
| 720 | |
| 721 | |
| 722 | void CodeStubGraphBuilderBase::BuildStoreNamedField( |
| 723 | HValue* object, HValue* value, FieldIndex index, |
| 724 | Representation representation) { |
| 725 | DCHECK(!index.is_double() || representation.IsDouble()); |
| 726 | int offset = index.offset(); |
| 727 | HObjectAccess access = |
| 728 | index.is_inobject() |
| 729 | ? HObjectAccess::ForObservableJSObjectOffset(offset, representation) |
| 730 | : HObjectAccess::ForBackingStoreOffset(offset, representation); |
| 731 | |
| 732 | if (representation.IsDouble()) { |
| 733 | // Load the heap number. |
| 734 | object = Add<HLoadNamedField>( |
| 735 | object, static_cast<HValue*>(NULL), |
| 736 | access.WithRepresentation(Representation::Tagged())); |
| 737 | // Store the double value into it. |
| 738 | access = HObjectAccess::ForHeapNumberValue(); |
| 739 | } else if (representation.IsHeapObject()) { |
| 740 | BuildCheckHeapObject(value); |
| 741 | } |
| 742 | |
| 743 | Add<HStoreNamedField>(object, access, value, INITIALIZING_STORE); |
| 744 | } |
| 745 | |
| 746 | |
| 747 | template <> |
| 748 | HValue* CodeStubGraphBuilder<StoreFieldStub>::BuildCodeStub() { |
| 749 | BuildStoreNamedField(GetParameter(0), GetParameter(2), casted_stub()->index(), |
| 750 | casted_stub()->representation()); |
| 751 | return GetParameter(2); |
| 752 | } |
| 753 | |
| 754 | |
| 755 | Handle<Code> StoreFieldStub::GenerateCode() { return DoGenerateCode(this); } |
| 756 | |
| 757 | |
| 758 | template <> |
| 759 | HValue* CodeStubGraphBuilder<StringLengthStub>::BuildCodeStub() { |
| 760 | HValue* string = BuildLoadNamedField(GetParameter(0), |
| 761 | FieldIndex::ForInObjectOffset(JSValue::kValueOffset)); |
| 762 | return BuildLoadNamedField(string, |
| 763 | FieldIndex::ForInObjectOffset(String::kLengthOffset)); |
| 764 | } |
| 765 | |
| 766 | |
| 767 | Handle<Code> StringLengthStub::GenerateCode() { |
| 768 | return DoGenerateCode(this); |
| 769 | } |
| 770 | |
| 771 | |
| 772 | template <> |
| 773 | HValue* CodeStubGraphBuilder<StoreFastElementStub>::BuildCodeStub() { |
| 774 | BuildUncheckedMonomorphicElementAccess( |
| 775 | GetParameter(StoreDescriptor::kReceiverIndex), |
| 776 | GetParameter(StoreDescriptor::kNameIndex), |
| 777 | GetParameter(StoreDescriptor::kValueIndex), casted_stub()->is_js_array(), |
| 778 | casted_stub()->elements_kind(), STORE, NEVER_RETURN_HOLE, |
| 779 | casted_stub()->store_mode()); |
| 780 | |
| 781 | return GetParameter(2); |
| 782 | } |
| 783 | |
| 784 | |
| 785 | Handle<Code> StoreFastElementStub::GenerateCode() { |
| 786 | return DoGenerateCode(this); |
| 787 | } |
| 788 | |
| 789 | |
| 790 | template <> |
| 791 | HValue* CodeStubGraphBuilder<TransitionElementsKindStub>::BuildCodeStub() { |
| 792 | info()->MarkAsSavesCallerDoubles(); |
| 793 | |
| 794 | BuildTransitionElementsKind(GetParameter(0), |
| 795 | GetParameter(1), |
| 796 | casted_stub()->from_kind(), |
| 797 | casted_stub()->to_kind(), |
| 798 | casted_stub()->is_js_array()); |
| 799 | |
| 800 | return GetParameter(0); |
| 801 | } |
| 802 | |
| 803 | |
| 804 | Handle<Code> TransitionElementsKindStub::GenerateCode() { |
| 805 | return DoGenerateCode(this); |
| 806 | } |
| 807 | |
| 808 | HValue* CodeStubGraphBuilderBase::BuildArrayConstructor( |
| 809 | ElementsKind kind, |
| 810 | AllocationSiteOverrideMode override_mode, |
| 811 | ArgumentClass argument_class) { |
| 812 | HValue* constructor = GetParameter(ArrayConstructorStubBase::kConstructor); |
| 813 | HValue* alloc_site = GetParameter(ArrayConstructorStubBase::kAllocationSite); |
| 814 | JSArrayBuilder array_builder(this, kind, alloc_site, constructor, |
| 815 | override_mode); |
| 816 | HValue* result = NULL; |
| 817 | switch (argument_class) { |
| 818 | case NONE: |
| 819 | // This stub is very performance sensitive, the generated code must be |
| 820 | // tuned so that it doesn't build and eager frame. |
| 821 | info()->MarkMustNotHaveEagerFrame(); |
| 822 | result = array_builder.AllocateEmptyArray(); |
| 823 | break; |
| 824 | case SINGLE: |
| 825 | result = BuildArraySingleArgumentConstructor(&array_builder); |
| 826 | break; |
| 827 | case MULTIPLE: |
| 828 | result = BuildArrayNArgumentsConstructor(&array_builder, kind); |
| 829 | break; |
| 830 | } |
| 831 | |
| 832 | return result; |
| 833 | } |
| 834 | |
| 835 | |
| 836 | HValue* CodeStubGraphBuilderBase::BuildInternalArrayConstructor( |
| 837 | ElementsKind kind, ArgumentClass argument_class) { |
| 838 | HValue* constructor = GetParameter( |
| 839 | InternalArrayConstructorStubBase::kConstructor); |
| 840 | JSArrayBuilder array_builder(this, kind, constructor); |
| 841 | |
| 842 | HValue* result = NULL; |
| 843 | switch (argument_class) { |
| 844 | case NONE: |
| 845 | // This stub is very performance sensitive, the generated code must be |
| 846 | // tuned so that it doesn't build and eager frame. |
| 847 | info()->MarkMustNotHaveEagerFrame(); |
| 848 | result = array_builder.AllocateEmptyArray(); |
| 849 | break; |
| 850 | case SINGLE: |
| 851 | result = BuildArraySingleArgumentConstructor(&array_builder); |
| 852 | break; |
| 853 | case MULTIPLE: |
| 854 | result = BuildArrayNArgumentsConstructor(&array_builder, kind); |
| 855 | break; |
| 856 | } |
| 857 | return result; |
| 858 | } |
| 859 | |
| 860 | |
| 861 | HValue* CodeStubGraphBuilderBase::BuildArraySingleArgumentConstructor( |
| 862 | JSArrayBuilder* array_builder) { |
| 863 | // Smi check and range check on the input arg. |
| 864 | HValue* constant_one = graph()->GetConstant1(); |
| 865 | HValue* constant_zero = graph()->GetConstant0(); |
| 866 | |
| 867 | HInstruction* elements = Add<HArgumentsElements>(false); |
| 868 | HInstruction* argument = Add<HAccessArgumentsAt>( |
| 869 | elements, constant_one, constant_zero); |
| 870 | |
| 871 | return BuildAllocateArrayFromLength(array_builder, argument); |
| 872 | } |
| 873 | |
| 874 | |
| 875 | HValue* CodeStubGraphBuilderBase::BuildArrayNArgumentsConstructor( |
| 876 | JSArrayBuilder* array_builder, ElementsKind kind) { |
| 877 | // Insert a bounds check because the number of arguments might exceed |
| 878 | // the kInitialMaxFastElementArray limit. This cannot happen for code |
| 879 | // that was parsed, but calling via Array.apply(thisArg, [...]) might |
| 880 | // trigger it. |
| 881 | HValue* length = GetArgumentsLength(); |
| 882 | HConstant* max_alloc_length = |
| 883 | Add<HConstant>(JSObject::kInitialMaxFastElementArray); |
| 884 | HValue* checked_length = Add<HBoundsCheck>(length, max_alloc_length); |
| 885 | |
| 886 | // We need to fill with the hole if it's a smi array in the multi-argument |
| 887 | // case because we might have to bail out while copying arguments into |
| 888 | // the array because they aren't compatible with a smi array. |
| 889 | // If it's a double array, no problem, and if it's fast then no |
| 890 | // problem either because doubles are boxed. |
| 891 | // |
| 892 | // TODO(mvstanton): consider an instruction to memset fill the array |
| 893 | // with zero in this case instead. |
| 894 | JSArrayBuilder::FillMode fill_mode = IsFastSmiElementsKind(kind) |
| 895 | ? JSArrayBuilder::FILL_WITH_HOLE |
| 896 | : JSArrayBuilder::DONT_FILL_WITH_HOLE; |
| 897 | HValue* new_object = array_builder->AllocateArray(checked_length, |
| 898 | max_alloc_length, |
| 899 | checked_length, |
| 900 | fill_mode); |
| 901 | HValue* elements = array_builder->GetElementsLocation(); |
| 902 | DCHECK(elements != NULL); |
| 903 | |
| 904 | // Now populate the elements correctly. |
| 905 | LoopBuilder builder(this, |
| 906 | context(), |
| 907 | LoopBuilder::kPostIncrement); |
| 908 | HValue* start = graph()->GetConstant0(); |
| 909 | HValue* key = builder.BeginBody(start, checked_length, Token::LT); |
| 910 | HInstruction* argument_elements = Add<HArgumentsElements>(false); |
| 911 | HInstruction* argument = Add<HAccessArgumentsAt>( |
| 912 | argument_elements, checked_length, key); |
| 913 | |
| 914 | Add<HStoreKeyed>(elements, key, argument, kind); |
| 915 | builder.EndBody(); |
| 916 | return new_object; |
| 917 | } |
| 918 | |
| 919 | |
| 920 | template <> |
| 921 | HValue* CodeStubGraphBuilder<ArrayNoArgumentConstructorStub>::BuildCodeStub() { |
| 922 | ElementsKind kind = casted_stub()->elements_kind(); |
| 923 | AllocationSiteOverrideMode override_mode = casted_stub()->override_mode(); |
| 924 | return BuildArrayConstructor(kind, override_mode, NONE); |
| 925 | } |
| 926 | |
| 927 | |
| 928 | Handle<Code> ArrayNoArgumentConstructorStub::GenerateCode() { |
| 929 | return DoGenerateCode(this); |
| 930 | } |
| 931 | |
| 932 | |
| 933 | template <> |
| 934 | HValue* CodeStubGraphBuilder<ArraySingleArgumentConstructorStub>:: |
| 935 | BuildCodeStub() { |
| 936 | ElementsKind kind = casted_stub()->elements_kind(); |
| 937 | AllocationSiteOverrideMode override_mode = casted_stub()->override_mode(); |
| 938 | return BuildArrayConstructor(kind, override_mode, SINGLE); |
| 939 | } |
| 940 | |
| 941 | |
| 942 | Handle<Code> ArraySingleArgumentConstructorStub::GenerateCode() { |
| 943 | return DoGenerateCode(this); |
| 944 | } |
| 945 | |
| 946 | |
| 947 | template <> |
| 948 | HValue* CodeStubGraphBuilder<ArrayNArgumentsConstructorStub>::BuildCodeStub() { |
| 949 | ElementsKind kind = casted_stub()->elements_kind(); |
| 950 | AllocationSiteOverrideMode override_mode = casted_stub()->override_mode(); |
| 951 | return BuildArrayConstructor(kind, override_mode, MULTIPLE); |
| 952 | } |
| 953 | |
| 954 | |
| 955 | Handle<Code> ArrayNArgumentsConstructorStub::GenerateCode() { |
| 956 | return DoGenerateCode(this); |
| 957 | } |
| 958 | |
| 959 | |
| 960 | template <> |
| 961 | HValue* CodeStubGraphBuilder<InternalArrayNoArgumentConstructorStub>:: |
| 962 | BuildCodeStub() { |
| 963 | ElementsKind kind = casted_stub()->elements_kind(); |
| 964 | return BuildInternalArrayConstructor(kind, NONE); |
| 965 | } |
| 966 | |
| 967 | |
| 968 | Handle<Code> InternalArrayNoArgumentConstructorStub::GenerateCode() { |
| 969 | return DoGenerateCode(this); |
| 970 | } |
| 971 | |
| 972 | |
| 973 | template <> |
| 974 | HValue* CodeStubGraphBuilder<InternalArraySingleArgumentConstructorStub>:: |
| 975 | BuildCodeStub() { |
| 976 | ElementsKind kind = casted_stub()->elements_kind(); |
| 977 | return BuildInternalArrayConstructor(kind, SINGLE); |
| 978 | } |
| 979 | |
| 980 | |
| 981 | Handle<Code> InternalArraySingleArgumentConstructorStub::GenerateCode() { |
| 982 | return DoGenerateCode(this); |
| 983 | } |
| 984 | |
| 985 | |
| 986 | template <> |
| 987 | HValue* CodeStubGraphBuilder<InternalArrayNArgumentsConstructorStub>:: |
| 988 | BuildCodeStub() { |
| 989 | ElementsKind kind = casted_stub()->elements_kind(); |
| 990 | return BuildInternalArrayConstructor(kind, MULTIPLE); |
| 991 | } |
| 992 | |
| 993 | |
| 994 | Handle<Code> InternalArrayNArgumentsConstructorStub::GenerateCode() { |
| 995 | return DoGenerateCode(this); |
| 996 | } |
| 997 | |
| 998 | |
| 999 | template <> |
| 1000 | HValue* CodeStubGraphBuilder<CompareNilICStub>::BuildCodeInitializedStub() { |
| 1001 | Isolate* isolate = graph()->isolate(); |
| 1002 | CompareNilICStub* stub = casted_stub(); |
| 1003 | HIfContinuation continuation; |
| 1004 | Handle<Map> sentinel_map(isolate->heap()->meta_map()); |
| 1005 | Type* type = stub->GetType(zone(), sentinel_map); |
| 1006 | BuildCompareNil(GetParameter(0), type, &continuation); |
| 1007 | IfBuilder if_nil(this, &continuation); |
| 1008 | if_nil.Then(); |
| 1009 | if (continuation.IsFalseReachable()) { |
| 1010 | if_nil.Else(); |
| 1011 | if_nil.Return(graph()->GetConstant0()); |
| 1012 | } |
| 1013 | if_nil.End(); |
| 1014 | return continuation.IsTrueReachable() |
| 1015 | ? graph()->GetConstant1() |
| 1016 | : graph()->GetConstantUndefined(); |
| 1017 | } |
| 1018 | |
| 1019 | |
| 1020 | Handle<Code> CompareNilICStub::GenerateCode() { |
| 1021 | return DoGenerateCode(this); |
| 1022 | } |
| 1023 | |
| 1024 | |
| 1025 | template <> |
| 1026 | HValue* CodeStubGraphBuilder<BinaryOpICStub>::BuildCodeInitializedStub() { |
| 1027 | BinaryOpICState state = casted_stub()->state(); |
| 1028 | |
| 1029 | HValue* left = GetParameter(BinaryOpICStub::kLeft); |
| 1030 | HValue* right = GetParameter(BinaryOpICStub::kRight); |
| 1031 | |
| 1032 | Type* left_type = state.GetLeftType(zone()); |
| 1033 | Type* right_type = state.GetRightType(zone()); |
| 1034 | Type* result_type = state.GetResultType(zone()); |
| 1035 | |
| 1036 | DCHECK(!left_type->Is(Type::None()) && !right_type->Is(Type::None()) && |
| 1037 | (state.HasSideEffects() || !result_type->Is(Type::None()))); |
| 1038 | |
| 1039 | HValue* result = NULL; |
| 1040 | HAllocationMode allocation_mode(NOT_TENURED); |
| 1041 | if (state.op() == Token::ADD && |
| 1042 | (left_type->Maybe(Type::String()) || right_type->Maybe(Type::String())) && |
| 1043 | !left_type->Is(Type::String()) && !right_type->Is(Type::String())) { |
| 1044 | // For the generic add stub a fast case for string addition is performance |
| 1045 | // critical. |
| 1046 | if (left_type->Maybe(Type::String())) { |
| 1047 | IfBuilder if_leftisstring(this); |
| 1048 | if_leftisstring.If<HIsStringAndBranch>(left); |
| 1049 | if_leftisstring.Then(); |
| 1050 | { |
| 1051 | Push(BuildBinaryOperation( |
| 1052 | state.op(), left, right, |
| 1053 | Type::String(zone()), right_type, |
| 1054 | result_type, state.fixed_right_arg(), |
| 1055 | allocation_mode)); |
| 1056 | } |
| 1057 | if_leftisstring.Else(); |
| 1058 | { |
| 1059 | Push(BuildBinaryOperation( |
| 1060 | state.op(), left, right, |
| 1061 | left_type, right_type, result_type, |
| 1062 | state.fixed_right_arg(), allocation_mode)); |
| 1063 | } |
| 1064 | if_leftisstring.End(); |
| 1065 | result = Pop(); |
| 1066 | } else { |
| 1067 | IfBuilder if_rightisstring(this); |
| 1068 | if_rightisstring.If<HIsStringAndBranch>(right); |
| 1069 | if_rightisstring.Then(); |
| 1070 | { |
| 1071 | Push(BuildBinaryOperation( |
| 1072 | state.op(), left, right, |
| 1073 | left_type, Type::String(zone()), |
| 1074 | result_type, state.fixed_right_arg(), |
| 1075 | allocation_mode)); |
| 1076 | } |
| 1077 | if_rightisstring.Else(); |
| 1078 | { |
| 1079 | Push(BuildBinaryOperation( |
| 1080 | state.op(), left, right, |
| 1081 | left_type, right_type, result_type, |
| 1082 | state.fixed_right_arg(), allocation_mode)); |
| 1083 | } |
| 1084 | if_rightisstring.End(); |
| 1085 | result = Pop(); |
| 1086 | } |
| 1087 | } else { |
| 1088 | result = BuildBinaryOperation( |
| 1089 | state.op(), left, right, |
| 1090 | left_type, right_type, result_type, |
| 1091 | state.fixed_right_arg(), allocation_mode); |
| 1092 | } |
| 1093 | |
| 1094 | // If we encounter a generic argument, the number conversion is |
| 1095 | // observable, thus we cannot afford to bail out after the fact. |
| 1096 | if (!state.HasSideEffects()) { |
| 1097 | result = EnforceNumberType(result, result_type); |
| 1098 | } |
| 1099 | |
| 1100 | // Reuse the double box of one of the operands if we are allowed to (i.e. |
| 1101 | // chained binops). |
| 1102 | if (state.CanReuseDoubleBox()) { |
| 1103 | HValue* operand = (state.mode() == OVERWRITE_LEFT) ? left : right; |
| 1104 | IfBuilder if_heap_number(this); |
| 1105 | if_heap_number.If<HHasInstanceTypeAndBranch>(operand, HEAP_NUMBER_TYPE); |
| 1106 | if_heap_number.Then(); |
| 1107 | Add<HStoreNamedField>(operand, HObjectAccess::ForHeapNumberValue(), result); |
| 1108 | Push(operand); |
| 1109 | if_heap_number.Else(); |
| 1110 | Push(result); |
| 1111 | if_heap_number.End(); |
| 1112 | result = Pop(); |
| 1113 | } |
| 1114 | |
| 1115 | return result; |
| 1116 | } |
| 1117 | |
| 1118 | |
| 1119 | Handle<Code> BinaryOpICStub::GenerateCode() { |
| 1120 | return DoGenerateCode(this); |
| 1121 | } |
| 1122 | |
| 1123 | |
| 1124 | template <> |
| 1125 | HValue* CodeStubGraphBuilder<BinaryOpWithAllocationSiteStub>::BuildCodeStub() { |
| 1126 | BinaryOpICState state = casted_stub()->state(); |
| 1127 | |
| 1128 | HValue* allocation_site = GetParameter( |
| 1129 | BinaryOpWithAllocationSiteStub::kAllocationSite); |
| 1130 | HValue* left = GetParameter(BinaryOpWithAllocationSiteStub::kLeft); |
| 1131 | HValue* right = GetParameter(BinaryOpWithAllocationSiteStub::kRight); |
| 1132 | |
| 1133 | Type* left_type = state.GetLeftType(zone()); |
| 1134 | Type* right_type = state.GetRightType(zone()); |
| 1135 | Type* result_type = state.GetResultType(zone()); |
| 1136 | HAllocationMode allocation_mode(allocation_site); |
| 1137 | |
| 1138 | return BuildBinaryOperation(state.op(), left, right, |
| 1139 | left_type, right_type, result_type, |
| 1140 | state.fixed_right_arg(), allocation_mode); |
| 1141 | } |
| 1142 | |
| 1143 | |
| 1144 | Handle<Code> BinaryOpWithAllocationSiteStub::GenerateCode() { |
| 1145 | return DoGenerateCode(this); |
| 1146 | } |
| 1147 | |
| 1148 | |
| 1149 | template <> |
| 1150 | HValue* CodeStubGraphBuilder<StringAddStub>::BuildCodeInitializedStub() { |
| 1151 | StringAddStub* stub = casted_stub(); |
| 1152 | StringAddFlags flags = stub->flags(); |
| 1153 | PretenureFlag pretenure_flag = stub->pretenure_flag(); |
| 1154 | |
| 1155 | HValue* left = GetParameter(StringAddStub::kLeft); |
| 1156 | HValue* right = GetParameter(StringAddStub::kRight); |
| 1157 | |
| 1158 | // Make sure that both arguments are strings if not known in advance. |
| 1159 | if ((flags & STRING_ADD_CHECK_LEFT) == STRING_ADD_CHECK_LEFT) { |
| 1160 | left = BuildCheckString(left); |
| 1161 | } |
| 1162 | if ((flags & STRING_ADD_CHECK_RIGHT) == STRING_ADD_CHECK_RIGHT) { |
| 1163 | right = BuildCheckString(right); |
| 1164 | } |
| 1165 | |
| 1166 | return BuildStringAdd(left, right, HAllocationMode(pretenure_flag)); |
| 1167 | } |
| 1168 | |
| 1169 | |
| 1170 | Handle<Code> StringAddStub::GenerateCode() { |
| 1171 | return DoGenerateCode(this); |
| 1172 | } |
| 1173 | |
| 1174 | |
| 1175 | template <> |
| 1176 | HValue* CodeStubGraphBuilder<ToBooleanStub>::BuildCodeInitializedStub() { |
| 1177 | ToBooleanStub* stub = casted_stub(); |
| 1178 | HValue* true_value = NULL; |
| 1179 | HValue* false_value = NULL; |
| 1180 | |
| 1181 | switch (stub->mode()) { |
| 1182 | case ToBooleanStub::RESULT_AS_SMI: |
| 1183 | true_value = graph()->GetConstant1(); |
| 1184 | false_value = graph()->GetConstant0(); |
| 1185 | break; |
| 1186 | case ToBooleanStub::RESULT_AS_ODDBALL: |
| 1187 | true_value = graph()->GetConstantTrue(); |
| 1188 | false_value = graph()->GetConstantFalse(); |
| 1189 | break; |
| 1190 | case ToBooleanStub::RESULT_AS_INVERSE_ODDBALL: |
| 1191 | true_value = graph()->GetConstantFalse(); |
| 1192 | false_value = graph()->GetConstantTrue(); |
| 1193 | break; |
| 1194 | } |
| 1195 | |
| 1196 | IfBuilder if_true(this); |
| 1197 | if_true.If<HBranch>(GetParameter(0), stub->types()); |
| 1198 | if_true.Then(); |
| 1199 | if_true.Return(true_value); |
| 1200 | if_true.Else(); |
| 1201 | if_true.End(); |
| 1202 | return false_value; |
| 1203 | } |
| 1204 | |
| 1205 | |
| 1206 | Handle<Code> ToBooleanStub::GenerateCode() { |
| 1207 | return DoGenerateCode(this); |
| 1208 | } |
| 1209 | |
| 1210 | |
| 1211 | template <> |
| 1212 | HValue* CodeStubGraphBuilder<StoreGlobalStub>::BuildCodeInitializedStub() { |
| 1213 | StoreGlobalStub* stub = casted_stub(); |
| 1214 | Handle<Object> placeholer_value(Smi::FromInt(0), isolate()); |
| 1215 | Handle<PropertyCell> placeholder_cell = |
| 1216 | isolate()->factory()->NewPropertyCell(placeholer_value); |
| 1217 | |
| 1218 | HParameter* value = GetParameter(StoreDescriptor::kValueIndex); |
| 1219 | |
| 1220 | if (stub->check_global()) { |
| 1221 | // Check that the map of the global has not changed: use a placeholder map |
| 1222 | // that will be replaced later with the global object's map. |
| 1223 | Handle<Map> placeholder_map = isolate()->factory()->meta_map(); |
| 1224 | HValue* global = Add<HConstant>( |
| 1225 | StoreGlobalStub::global_placeholder(isolate())); |
| 1226 | Add<HCheckMaps>(global, placeholder_map); |
| 1227 | } |
| 1228 | |
| 1229 | HValue* cell = Add<HConstant>(placeholder_cell); |
| 1230 | HObjectAccess access(HObjectAccess::ForCellPayload(isolate())); |
| 1231 | HValue* cell_contents = Add<HLoadNamedField>( |
| 1232 | cell, static_cast<HValue*>(NULL), access); |
| 1233 | |
| 1234 | if (stub->is_constant()) { |
| 1235 | IfBuilder builder(this); |
| 1236 | builder.If<HCompareObjectEqAndBranch>(cell_contents, value); |
| 1237 | builder.Then(); |
| 1238 | builder.ElseDeopt("Unexpected cell contents in constant global store"); |
| 1239 | builder.End(); |
| 1240 | } else { |
| 1241 | // Load the payload of the global parameter cell. A hole indicates that the |
| 1242 | // property has been deleted and that the store must be handled by the |
| 1243 | // runtime. |
| 1244 | IfBuilder builder(this); |
| 1245 | HValue* hole_value = graph()->GetConstantHole(); |
| 1246 | builder.If<HCompareObjectEqAndBranch>(cell_contents, hole_value); |
| 1247 | builder.Then(); |
| 1248 | builder.Deopt("Unexpected cell contents in global store"); |
| 1249 | builder.Else(); |
| 1250 | Add<HStoreNamedField>(cell, access, value); |
| 1251 | builder.End(); |
| 1252 | } |
| 1253 | |
| 1254 | return value; |
| 1255 | } |
| 1256 | |
| 1257 | |
| 1258 | Handle<Code> StoreGlobalStub::GenerateCode() { |
| 1259 | return DoGenerateCode(this); |
| 1260 | } |
| 1261 | |
| 1262 | |
| 1263 | template<> |
| 1264 | HValue* CodeStubGraphBuilder<ElementsTransitionAndStoreStub>::BuildCodeStub() { |
| 1265 | HValue* value = GetParameter(ElementsTransitionAndStoreStub::kValueIndex); |
| 1266 | HValue* map = GetParameter(ElementsTransitionAndStoreStub::kMapIndex); |
| 1267 | HValue* key = GetParameter(ElementsTransitionAndStoreStub::kKeyIndex); |
| 1268 | HValue* object = GetParameter(ElementsTransitionAndStoreStub::kObjectIndex); |
| 1269 | |
| 1270 | if (FLAG_trace_elements_transitions) { |
| 1271 | // Tracing elements transitions is the job of the runtime. |
| 1272 | Add<HDeoptimize>("Tracing elements transitions", Deoptimizer::EAGER); |
| 1273 | } else { |
| 1274 | info()->MarkAsSavesCallerDoubles(); |
| 1275 | |
| 1276 | BuildTransitionElementsKind(object, map, |
| 1277 | casted_stub()->from_kind(), |
| 1278 | casted_stub()->to_kind(), |
| 1279 | casted_stub()->is_jsarray()); |
| 1280 | |
| 1281 | BuildUncheckedMonomorphicElementAccess(object, key, value, |
| 1282 | casted_stub()->is_jsarray(), |
| 1283 | casted_stub()->to_kind(), |
| 1284 | STORE, ALLOW_RETURN_HOLE, |
| 1285 | casted_stub()->store_mode()); |
| 1286 | } |
| 1287 | |
| 1288 | return value; |
| 1289 | } |
| 1290 | |
| 1291 | |
| 1292 | Handle<Code> ElementsTransitionAndStoreStub::GenerateCode() { |
| 1293 | return DoGenerateCode(this); |
| 1294 | } |
| 1295 | |
| 1296 | |
| 1297 | void CodeStubGraphBuilderBase::BuildCheckAndInstallOptimizedCode( |
| 1298 | HValue* js_function, |
| 1299 | HValue* native_context, |
| 1300 | IfBuilder* builder, |
| 1301 | HValue* optimized_map, |
| 1302 | HValue* map_index) { |
| 1303 | HValue* osr_ast_id_none = Add<HConstant>(BailoutId::None().ToInt()); |
| 1304 | HValue* context_slot = LoadFromOptimizedCodeMap( |
| 1305 | optimized_map, map_index, SharedFunctionInfo::kContextOffset); |
| 1306 | HValue* osr_ast_slot = LoadFromOptimizedCodeMap( |
| 1307 | optimized_map, map_index, SharedFunctionInfo::kOsrAstIdOffset); |
| 1308 | builder->If<HCompareObjectEqAndBranch>(native_context, |
| 1309 | context_slot); |
| 1310 | builder->AndIf<HCompareObjectEqAndBranch>(osr_ast_slot, osr_ast_id_none); |
| 1311 | builder->Then(); |
| 1312 | HValue* code_object = LoadFromOptimizedCodeMap(optimized_map, |
| 1313 | map_index, SharedFunctionInfo::kCachedCodeOffset); |
| 1314 | // and the literals |
| 1315 | HValue* literals = LoadFromOptimizedCodeMap(optimized_map, |
| 1316 | map_index, SharedFunctionInfo::kLiteralsOffset); |
| 1317 | |
| 1318 | Counters* counters = isolate()->counters(); |
| 1319 | AddIncrementCounter(counters->fast_new_closure_install_optimized()); |
| 1320 | |
| 1321 | // TODO(fschneider): Idea: store proper code pointers in the optimized code |
| 1322 | // map and either unmangle them on marking or do nothing as the whole map is |
| 1323 | // discarded on major GC anyway. |
| 1324 | Add<HStoreCodeEntry>(js_function, code_object); |
| 1325 | Add<HStoreNamedField>(js_function, HObjectAccess::ForLiteralsPointer(), |
| 1326 | literals); |
| 1327 | |
| 1328 | // Now link a function into a list of optimized functions. |
| 1329 | HValue* optimized_functions_list = Add<HLoadNamedField>( |
| 1330 | native_context, static_cast<HValue*>(NULL), |
| 1331 | HObjectAccess::ForContextSlot(Context::OPTIMIZED_FUNCTIONS_LIST)); |
| 1332 | Add<HStoreNamedField>(js_function, |
| 1333 | HObjectAccess::ForNextFunctionLinkPointer(), |
| 1334 | optimized_functions_list); |
| 1335 | |
| 1336 | // This store is the only one that should have a write barrier. |
| 1337 | Add<HStoreNamedField>(native_context, |
| 1338 | HObjectAccess::ForContextSlot(Context::OPTIMIZED_FUNCTIONS_LIST), |
| 1339 | js_function); |
| 1340 | |
| 1341 | // The builder continues in the "then" after this function. |
| 1342 | } |
| 1343 | |
| 1344 | |
| 1345 | void CodeStubGraphBuilderBase::BuildInstallCode(HValue* js_function, |
| 1346 | HValue* shared_info) { |
| 1347 | Add<HStoreNamedField>(js_function, |
| 1348 | HObjectAccess::ForNextFunctionLinkPointer(), |
| 1349 | graph()->GetConstantUndefined()); |
| 1350 | HValue* code_object = Add<HLoadNamedField>( |
| 1351 | shared_info, static_cast<HValue*>(NULL), HObjectAccess::ForCodeOffset()); |
| 1352 | Add<HStoreCodeEntry>(js_function, code_object); |
| 1353 | } |
| 1354 | |
| 1355 | |
| 1356 | HInstruction* CodeStubGraphBuilderBase::LoadFromOptimizedCodeMap( |
| 1357 | HValue* optimized_map, |
| 1358 | HValue* iterator, |
| 1359 | int field_offset) { |
| 1360 | // By making sure to express these loads in the form [<hvalue> + constant] |
| 1361 | // the keyed load can be hoisted. |
| 1362 | DCHECK(field_offset >= 0 && field_offset < SharedFunctionInfo::kEntryLength); |
| 1363 | HValue* field_slot = iterator; |
| 1364 | if (field_offset > 0) { |
| 1365 | HValue* field_offset_value = Add<HConstant>(field_offset); |
| 1366 | field_slot = AddUncasted<HAdd>(iterator, field_offset_value); |
| 1367 | } |
| 1368 | HInstruction* field_entry = Add<HLoadKeyed>(optimized_map, field_slot, |
| 1369 | static_cast<HValue*>(NULL), FAST_ELEMENTS); |
| 1370 | return field_entry; |
| 1371 | } |
| 1372 | |
| 1373 | |
| 1374 | void CodeStubGraphBuilderBase::BuildInstallFromOptimizedCodeMap( |
| 1375 | HValue* js_function, |
| 1376 | HValue* shared_info, |
| 1377 | HValue* native_context) { |
| 1378 | Counters* counters = isolate()->counters(); |
| 1379 | IfBuilder is_optimized(this); |
| 1380 | HInstruction* optimized_map = Add<HLoadNamedField>( |
| 1381 | shared_info, static_cast<HValue*>(NULL), |
| 1382 | HObjectAccess::ForOptimizedCodeMap()); |
| 1383 | HValue* null_constant = Add<HConstant>(0); |
| 1384 | is_optimized.If<HCompareObjectEqAndBranch>(optimized_map, null_constant); |
| 1385 | is_optimized.Then(); |
| 1386 | { |
| 1387 | BuildInstallCode(js_function, shared_info); |
| 1388 | } |
| 1389 | is_optimized.Else(); |
| 1390 | { |
| 1391 | AddIncrementCounter(counters->fast_new_closure_try_optimized()); |
| 1392 | // optimized_map points to fixed array of 3-element entries |
| 1393 | // (native context, optimized code, literals). |
| 1394 | // Map must never be empty, so check the first elements. |
| 1395 | HValue* first_entry_index = |
| 1396 | Add<HConstant>(SharedFunctionInfo::kEntriesStart); |
| 1397 | IfBuilder already_in(this); |
| 1398 | BuildCheckAndInstallOptimizedCode(js_function, native_context, &already_in, |
| 1399 | optimized_map, first_entry_index); |
| 1400 | already_in.Else(); |
| 1401 | { |
| 1402 | // Iterate through the rest of map backwards. Do not double check first |
| 1403 | // entry. After the loop, if no matching optimized code was found, |
| 1404 | // install unoptimized code. |
| 1405 | // for(i = map.length() - SharedFunctionInfo::kEntryLength; |
| 1406 | // i > SharedFunctionInfo::kEntriesStart; |
| 1407 | // i -= SharedFunctionInfo::kEntryLength) { .. } |
| 1408 | HValue* shared_function_entry_length = |
| 1409 | Add<HConstant>(SharedFunctionInfo::kEntryLength); |
| 1410 | LoopBuilder loop_builder(this, |
| 1411 | context(), |
| 1412 | LoopBuilder::kPostDecrement, |
| 1413 | shared_function_entry_length); |
| 1414 | HValue* array_length = Add<HLoadNamedField>( |
| 1415 | optimized_map, static_cast<HValue*>(NULL), |
| 1416 | HObjectAccess::ForFixedArrayLength()); |
| 1417 | HValue* start_pos = AddUncasted<HSub>(array_length, |
| 1418 | shared_function_entry_length); |
| 1419 | HValue* slot_iterator = loop_builder.BeginBody(start_pos, |
| 1420 | first_entry_index, |
| 1421 | Token::GT); |
| 1422 | { |
| 1423 | IfBuilder done_check(this); |
| 1424 | BuildCheckAndInstallOptimizedCode(js_function, native_context, |
| 1425 | &done_check, |
| 1426 | optimized_map, |
| 1427 | slot_iterator); |
| 1428 | // Fall out of the loop |
| 1429 | loop_builder.Break(); |
| 1430 | } |
| 1431 | loop_builder.EndBody(); |
| 1432 | |
| 1433 | // If slot_iterator equals first entry index, then we failed to find and |
| 1434 | // install optimized code |
| 1435 | IfBuilder no_optimized_code_check(this); |
| 1436 | no_optimized_code_check.If<HCompareNumericAndBranch>( |
| 1437 | slot_iterator, first_entry_index, Token::EQ); |
| 1438 | no_optimized_code_check.Then(); |
| 1439 | { |
| 1440 | // Store the unoptimized code |
| 1441 | BuildInstallCode(js_function, shared_info); |
| 1442 | } |
| 1443 | } |
| 1444 | } |
| 1445 | } |
| 1446 | |
| 1447 | |
| 1448 | template<> |
| 1449 | HValue* CodeStubGraphBuilder<FastNewClosureStub>::BuildCodeStub() { |
| 1450 | Counters* counters = isolate()->counters(); |
| 1451 | Factory* factory = isolate()->factory(); |
| 1452 | HInstruction* empty_fixed_array = |
| 1453 | Add<HConstant>(factory->empty_fixed_array()); |
| 1454 | HValue* shared_info = GetParameter(0); |
| 1455 | |
| 1456 | AddIncrementCounter(counters->fast_new_closure_total()); |
| 1457 | |
| 1458 | // Create a new closure from the given function info in new space |
| 1459 | HValue* size = Add<HConstant>(JSFunction::kSize); |
| 1460 | HInstruction* js_function = Add<HAllocate>(size, HType::JSObject(), |
| 1461 | NOT_TENURED, JS_FUNCTION_TYPE); |
| 1462 | |
| 1463 | int map_index = Context::FunctionMapIndex(casted_stub()->strict_mode(), |
| 1464 | casted_stub()->kind()); |
| 1465 | |
| 1466 | // Compute the function map in the current native context and set that |
| 1467 | // as the map of the allocated object. |
| 1468 | HInstruction* native_context = BuildGetNativeContext(); |
| 1469 | HInstruction* map_slot_value = Add<HLoadNamedField>( |
| 1470 | native_context, static_cast<HValue*>(NULL), |
| 1471 | HObjectAccess::ForContextSlot(map_index)); |
| 1472 | Add<HStoreNamedField>(js_function, HObjectAccess::ForMap(), map_slot_value); |
| 1473 | |
| 1474 | // Initialize the rest of the function. |
| 1475 | Add<HStoreNamedField>(js_function, HObjectAccess::ForPropertiesPointer(), |
| 1476 | empty_fixed_array); |
| 1477 | Add<HStoreNamedField>(js_function, HObjectAccess::ForElementsPointer(), |
| 1478 | empty_fixed_array); |
| 1479 | Add<HStoreNamedField>(js_function, HObjectAccess::ForLiteralsPointer(), |
| 1480 | empty_fixed_array); |
| 1481 | Add<HStoreNamedField>(js_function, HObjectAccess::ForPrototypeOrInitialMap(), |
| 1482 | graph()->GetConstantHole()); |
| 1483 | Add<HStoreNamedField>(js_function, |
| 1484 | HObjectAccess::ForSharedFunctionInfoPointer(), |
| 1485 | shared_info); |
| 1486 | Add<HStoreNamedField>(js_function, HObjectAccess::ForFunctionContextPointer(), |
| 1487 | context()); |
| 1488 | |
| 1489 | // Initialize the code pointer in the function to be the one |
| 1490 | // found in the shared function info object. |
| 1491 | // But first check if there is an optimized version for our context. |
| 1492 | if (FLAG_cache_optimized_code) { |
| 1493 | BuildInstallFromOptimizedCodeMap(js_function, shared_info, native_context); |
| 1494 | } else { |
| 1495 | BuildInstallCode(js_function, shared_info); |
| 1496 | } |
| 1497 | |
| 1498 | return js_function; |
| 1499 | } |
| 1500 | |
| 1501 | |
| 1502 | Handle<Code> FastNewClosureStub::GenerateCode() { |
| 1503 | return DoGenerateCode(this); |
| 1504 | } |
| 1505 | |
| 1506 | |
| 1507 | template<> |
| 1508 | HValue* CodeStubGraphBuilder<FastNewContextStub>::BuildCodeStub() { |
| 1509 | int length = casted_stub()->slots() + Context::MIN_CONTEXT_SLOTS; |
| 1510 | |
| 1511 | // Get the function. |
| 1512 | HParameter* function = GetParameter(FastNewContextStub::kFunction); |
| 1513 | |
| 1514 | // Allocate the context in new space. |
| 1515 | HAllocate* function_context = Add<HAllocate>( |
| 1516 | Add<HConstant>(length * kPointerSize + FixedArray::kHeaderSize), |
| 1517 | HType::HeapObject(), NOT_TENURED, FIXED_ARRAY_TYPE); |
| 1518 | |
| 1519 | // Set up the object header. |
| 1520 | AddStoreMapConstant(function_context, |
| 1521 | isolate()->factory()->function_context_map()); |
| 1522 | Add<HStoreNamedField>(function_context, |
| 1523 | HObjectAccess::ForFixedArrayLength(), |
| 1524 | Add<HConstant>(length)); |
| 1525 | |
| 1526 | // Set up the fixed slots. |
| 1527 | Add<HStoreNamedField>(function_context, |
| 1528 | HObjectAccess::ForContextSlot(Context::CLOSURE_INDEX), |
| 1529 | function); |
| 1530 | Add<HStoreNamedField>(function_context, |
| 1531 | HObjectAccess::ForContextSlot(Context::PREVIOUS_INDEX), |
| 1532 | context()); |
| 1533 | Add<HStoreNamedField>(function_context, |
| 1534 | HObjectAccess::ForContextSlot(Context::EXTENSION_INDEX), |
| 1535 | graph()->GetConstant0()); |
| 1536 | |
| 1537 | // Copy the global object from the previous context. |
| 1538 | HValue* global_object = Add<HLoadNamedField>( |
| 1539 | context(), static_cast<HValue*>(NULL), |
| 1540 | HObjectAccess::ForContextSlot(Context::GLOBAL_OBJECT_INDEX)); |
| 1541 | Add<HStoreNamedField>(function_context, |
| 1542 | HObjectAccess::ForContextSlot( |
| 1543 | Context::GLOBAL_OBJECT_INDEX), |
| 1544 | global_object); |
| 1545 | |
| 1546 | // Initialize the rest of the slots to undefined. |
| 1547 | for (int i = Context::MIN_CONTEXT_SLOTS; i < length; ++i) { |
| 1548 | Add<HStoreNamedField>(function_context, |
| 1549 | HObjectAccess::ForContextSlot(i), |
| 1550 | graph()->GetConstantUndefined()); |
| 1551 | } |
| 1552 | |
| 1553 | return function_context; |
| 1554 | } |
| 1555 | |
| 1556 | |
| 1557 | Handle<Code> FastNewContextStub::GenerateCode() { |
| 1558 | return DoGenerateCode(this); |
| 1559 | } |
| 1560 | |
| 1561 | |
| 1562 | template <> |
| 1563 | HValue* CodeStubGraphBuilder<LoadDictionaryElementStub>::BuildCodeStub() { |
| 1564 | HValue* receiver = GetParameter(LoadDescriptor::kReceiverIndex); |
| 1565 | HValue* key = GetParameter(LoadDescriptor::kNameIndex); |
| 1566 | |
| 1567 | Add<HCheckSmi>(key); |
| 1568 | |
| 1569 | HValue* elements = AddLoadElements(receiver); |
| 1570 | |
| 1571 | HValue* hash = BuildElementIndexHash(key); |
| 1572 | |
| 1573 | return BuildUncheckedDictionaryElementLoad(receiver, elements, key, hash); |
| 1574 | } |
| 1575 | |
| 1576 | |
| 1577 | Handle<Code> LoadDictionaryElementStub::GenerateCode() { |
| 1578 | return DoGenerateCode(this); |
| 1579 | } |
| 1580 | |
| 1581 | |
| 1582 | template<> |
| 1583 | HValue* CodeStubGraphBuilder<RegExpConstructResultStub>::BuildCodeStub() { |
| 1584 | // Determine the parameters. |
| 1585 | HValue* length = GetParameter(RegExpConstructResultStub::kLength); |
| 1586 | HValue* index = GetParameter(RegExpConstructResultStub::kIndex); |
| 1587 | HValue* input = GetParameter(RegExpConstructResultStub::kInput); |
| 1588 | |
| 1589 | info()->MarkMustNotHaveEagerFrame(); |
| 1590 | |
| 1591 | return BuildRegExpConstructResult(length, index, input); |
| 1592 | } |
| 1593 | |
| 1594 | |
| 1595 | Handle<Code> RegExpConstructResultStub::GenerateCode() { |
| 1596 | return DoGenerateCode(this); |
| 1597 | } |
| 1598 | |
| 1599 | |
| 1600 | template <> |
| 1601 | class CodeStubGraphBuilder<KeyedLoadGenericStub> |
| 1602 | : public CodeStubGraphBuilderBase { |
| 1603 | public: |
| 1604 | CodeStubGraphBuilder(Isolate* isolate, KeyedLoadGenericStub* stub) |
| 1605 | : CodeStubGraphBuilderBase(isolate, stub) {} |
| 1606 | |
| 1607 | protected: |
| 1608 | virtual HValue* BuildCodeStub(); |
| 1609 | |
| 1610 | void BuildElementsKindLimitCheck(HGraphBuilder::IfBuilder* if_builder, |
| 1611 | HValue* bit_field2, |
| 1612 | ElementsKind kind); |
| 1613 | |
| 1614 | void BuildFastElementLoad(HGraphBuilder::IfBuilder* if_builder, |
| 1615 | HValue* receiver, |
| 1616 | HValue* key, |
| 1617 | HValue* instance_type, |
| 1618 | HValue* bit_field2, |
| 1619 | ElementsKind kind); |
| 1620 | |
| 1621 | void BuildExternalElementLoad(HGraphBuilder::IfBuilder* if_builder, |
| 1622 | HValue* receiver, |
| 1623 | HValue* key, |
| 1624 | HValue* instance_type, |
| 1625 | HValue* bit_field2, |
| 1626 | ElementsKind kind); |
| 1627 | |
| 1628 | KeyedLoadGenericStub* casted_stub() { |
| 1629 | return static_cast<KeyedLoadGenericStub*>(stub()); |
| 1630 | } |
| 1631 | }; |
| 1632 | |
| 1633 | |
| 1634 | void CodeStubGraphBuilder<KeyedLoadGenericStub>::BuildElementsKindLimitCheck( |
| 1635 | HGraphBuilder::IfBuilder* if_builder, HValue* bit_field2, |
| 1636 | ElementsKind kind) { |
| 1637 | ElementsKind next_kind = static_cast<ElementsKind>(kind + 1); |
| 1638 | HValue* kind_limit = Add<HConstant>( |
| 1639 | static_cast<int>(Map::ElementsKindBits::encode(next_kind))); |
| 1640 | |
| 1641 | if_builder->If<HCompareNumericAndBranch>(bit_field2, kind_limit, Token::LT); |
| 1642 | if_builder->Then(); |
| 1643 | } |
| 1644 | |
| 1645 | |
| 1646 | void CodeStubGraphBuilder<KeyedLoadGenericStub>::BuildFastElementLoad( |
| 1647 | HGraphBuilder::IfBuilder* if_builder, HValue* receiver, HValue* key, |
| 1648 | HValue* instance_type, HValue* bit_field2, ElementsKind kind) { |
| 1649 | DCHECK(!IsExternalArrayElementsKind(kind)); |
| 1650 | |
| 1651 | BuildElementsKindLimitCheck(if_builder, bit_field2, kind); |
| 1652 | |
| 1653 | IfBuilder js_array_check(this); |
| 1654 | js_array_check.If<HCompareNumericAndBranch>( |
| 1655 | instance_type, Add<HConstant>(JS_ARRAY_TYPE), Token::EQ); |
| 1656 | js_array_check.Then(); |
| 1657 | Push(BuildUncheckedMonomorphicElementAccess(receiver, key, NULL, |
| 1658 | true, kind, |
| 1659 | LOAD, NEVER_RETURN_HOLE, |
| 1660 | STANDARD_STORE)); |
| 1661 | js_array_check.Else(); |
| 1662 | Push(BuildUncheckedMonomorphicElementAccess(receiver, key, NULL, |
| 1663 | false, kind, |
| 1664 | LOAD, NEVER_RETURN_HOLE, |
| 1665 | STANDARD_STORE)); |
| 1666 | js_array_check.End(); |
| 1667 | } |
| 1668 | |
| 1669 | |
| 1670 | void CodeStubGraphBuilder<KeyedLoadGenericStub>::BuildExternalElementLoad( |
| 1671 | HGraphBuilder::IfBuilder* if_builder, HValue* receiver, HValue* key, |
| 1672 | HValue* instance_type, HValue* bit_field2, ElementsKind kind) { |
| 1673 | DCHECK(IsExternalArrayElementsKind(kind)); |
| 1674 | |
| 1675 | BuildElementsKindLimitCheck(if_builder, bit_field2, kind); |
| 1676 | |
| 1677 | Push(BuildUncheckedMonomorphicElementAccess(receiver, key, NULL, |
| 1678 | false, kind, |
| 1679 | LOAD, NEVER_RETURN_HOLE, |
| 1680 | STANDARD_STORE)); |
| 1681 | } |
| 1682 | |
| 1683 | |
| 1684 | HValue* CodeStubGraphBuilder<KeyedLoadGenericStub>::BuildCodeStub() { |
| 1685 | HValue* receiver = GetParameter(LoadDescriptor::kReceiverIndex); |
| 1686 | HValue* key = GetParameter(LoadDescriptor::kNameIndex); |
| 1687 | |
| 1688 | // Split into a smi/integer case and unique string case. |
| 1689 | HIfContinuation index_name_split_continuation(graph()->CreateBasicBlock(), |
| 1690 | graph()->CreateBasicBlock()); |
| 1691 | |
| 1692 | BuildKeyedIndexCheck(key, &index_name_split_continuation); |
| 1693 | |
| 1694 | IfBuilder index_name_split(this, &index_name_split_continuation); |
| 1695 | index_name_split.Then(); |
| 1696 | { |
| 1697 | // Key is an index (number) |
| 1698 | key = Pop(); |
| 1699 | |
| 1700 | int bit_field_mask = (1 << Map::kIsAccessCheckNeeded) | |
| 1701 | (1 << Map::kHasIndexedInterceptor); |
| 1702 | BuildJSObjectCheck(receiver, bit_field_mask); |
| 1703 | |
| 1704 | HValue* map = Add<HLoadNamedField>(receiver, static_cast<HValue*>(NULL), |
| 1705 | HObjectAccess::ForMap()); |
| 1706 | |
| 1707 | HValue* instance_type = |
| 1708 | Add<HLoadNamedField>(map, static_cast<HValue*>(NULL), |
| 1709 | HObjectAccess::ForMapInstanceType()); |
| 1710 | |
| 1711 | HValue* bit_field2 = Add<HLoadNamedField>(map, |
| 1712 | static_cast<HValue*>(NULL), |
| 1713 | HObjectAccess::ForMapBitField2()); |
| 1714 | |
| 1715 | IfBuilder kind_if(this); |
| 1716 | BuildFastElementLoad(&kind_if, receiver, key, instance_type, bit_field2, |
| 1717 | FAST_HOLEY_ELEMENTS); |
| 1718 | |
| 1719 | kind_if.Else(); |
| 1720 | { |
| 1721 | BuildFastElementLoad(&kind_if, receiver, key, instance_type, bit_field2, |
| 1722 | FAST_HOLEY_DOUBLE_ELEMENTS); |
| 1723 | } |
| 1724 | kind_if.Else(); |
| 1725 | |
| 1726 | // The DICTIONARY_ELEMENTS check generates a "kind_if.Then" |
| 1727 | BuildElementsKindLimitCheck(&kind_if, bit_field2, DICTIONARY_ELEMENTS); |
| 1728 | { |
| 1729 | HValue* elements = AddLoadElements(receiver); |
| 1730 | |
| 1731 | HValue* hash = BuildElementIndexHash(key); |
| 1732 | |
| 1733 | Push(BuildUncheckedDictionaryElementLoad(receiver, elements, key, hash)); |
| 1734 | } |
| 1735 | kind_if.Else(); |
| 1736 | |
| 1737 | // The SLOPPY_ARGUMENTS_ELEMENTS check generates a "kind_if.Then" |
| 1738 | BuildElementsKindLimitCheck(&kind_if, bit_field2, |
| 1739 | SLOPPY_ARGUMENTS_ELEMENTS); |
| 1740 | // Non-strict elements are not handled. |
| 1741 | Add<HDeoptimize>("non-strict elements in KeyedLoadGenericStub", |
| 1742 | Deoptimizer::EAGER); |
| 1743 | Push(graph()->GetConstant0()); |
| 1744 | |
| 1745 | kind_if.Else(); |
| 1746 | BuildExternalElementLoad(&kind_if, receiver, key, instance_type, bit_field2, |
| 1747 | EXTERNAL_INT8_ELEMENTS); |
| 1748 | |
| 1749 | kind_if.Else(); |
| 1750 | BuildExternalElementLoad(&kind_if, receiver, key, instance_type, bit_field2, |
| 1751 | EXTERNAL_UINT8_ELEMENTS); |
| 1752 | |
| 1753 | kind_if.Else(); |
| 1754 | BuildExternalElementLoad(&kind_if, receiver, key, instance_type, bit_field2, |
| 1755 | EXTERNAL_INT16_ELEMENTS); |
| 1756 | |
| 1757 | kind_if.Else(); |
| 1758 | BuildExternalElementLoad(&kind_if, receiver, key, instance_type, bit_field2, |
| 1759 | EXTERNAL_UINT16_ELEMENTS); |
| 1760 | |
| 1761 | kind_if.Else(); |
| 1762 | BuildExternalElementLoad(&kind_if, receiver, key, instance_type, bit_field2, |
| 1763 | EXTERNAL_INT32_ELEMENTS); |
| 1764 | |
| 1765 | kind_if.Else(); |
| 1766 | BuildExternalElementLoad(&kind_if, receiver, key, instance_type, bit_field2, |
| 1767 | EXTERNAL_UINT32_ELEMENTS); |
| 1768 | |
| 1769 | kind_if.Else(); |
| 1770 | BuildExternalElementLoad(&kind_if, receiver, key, instance_type, bit_field2, |
| 1771 | EXTERNAL_FLOAT32_ELEMENTS); |
| 1772 | |
| 1773 | kind_if.Else(); |
| 1774 | BuildExternalElementLoad(&kind_if, receiver, key, instance_type, bit_field2, |
| 1775 | EXTERNAL_FLOAT64_ELEMENTS); |
| 1776 | |
| 1777 | kind_if.Else(); |
| 1778 | BuildExternalElementLoad(&kind_if, receiver, key, instance_type, bit_field2, |
| 1779 | EXTERNAL_UINT8_CLAMPED_ELEMENTS); |
| 1780 | |
| 1781 | kind_if.ElseDeopt("ElementsKind unhandled in KeyedLoadGenericStub"); |
| 1782 | |
| 1783 | kind_if.End(); |
| 1784 | } |
| 1785 | index_name_split.Else(); |
| 1786 | { |
| 1787 | // Key is a unique string. |
| 1788 | key = Pop(); |
| 1789 | |
| 1790 | int bit_field_mask = (1 << Map::kIsAccessCheckNeeded) | |
| 1791 | (1 << Map::kHasNamedInterceptor); |
| 1792 | BuildJSObjectCheck(receiver, bit_field_mask); |
| 1793 | |
| 1794 | HIfContinuation continuation; |
| 1795 | BuildTestForDictionaryProperties(receiver, &continuation); |
| 1796 | IfBuilder if_dict_properties(this, &continuation); |
| 1797 | if_dict_properties.Then(); |
| 1798 | { |
| 1799 | // Key is string, properties are dictionary mode |
| 1800 | BuildNonGlobalObjectCheck(receiver); |
| 1801 | |
| 1802 | HValue* properties = Add<HLoadNamedField>( |
| 1803 | receiver, static_cast<HValue*>(NULL), |
| 1804 | HObjectAccess::ForPropertiesPointer()); |
| 1805 | |
| 1806 | HValue* hash = |
| 1807 | Add<HLoadNamedField>(key, static_cast<HValue*>(NULL), |
| 1808 | HObjectAccess::ForNameHashField()); |
| 1809 | |
| 1810 | hash = AddUncasted<HShr>(hash, Add<HConstant>(Name::kHashShift)); |
| 1811 | |
| 1812 | HValue* value = BuildUncheckedDictionaryElementLoad(receiver, |
| 1813 | properties, |
| 1814 | key, |
| 1815 | hash); |
| 1816 | Push(value); |
| 1817 | } |
| 1818 | if_dict_properties.Else(); |
| 1819 | { |
| 1820 | // Key is string, properties are fast mode |
| 1821 | HValue* hash = BuildKeyedLookupCacheHash(receiver, key); |
| 1822 | |
| 1823 | ExternalReference cache_keys_ref = |
| 1824 | ExternalReference::keyed_lookup_cache_keys(isolate()); |
| 1825 | HValue* cache_keys = Add<HConstant>(cache_keys_ref); |
| 1826 | |
| 1827 | HValue* map = Add<HLoadNamedField>(receiver, static_cast<HValue*>(NULL), |
| 1828 | HObjectAccess::ForMap()); |
| 1829 | HValue* base_index = AddUncasted<HMul>(hash, Add<HConstant>(2)); |
| 1830 | base_index->ClearFlag(HValue::kCanOverflow); |
| 1831 | |
| 1832 | HIfContinuation inline_or_runtime_continuation( |
| 1833 | graph()->CreateBasicBlock(), graph()->CreateBasicBlock()); |
| 1834 | { |
| 1835 | IfBuilder lookup_ifs[KeyedLookupCache::kEntriesPerBucket]; |
| 1836 | for (int probe = 0; probe < KeyedLookupCache::kEntriesPerBucket; |
| 1837 | ++probe) { |
| 1838 | IfBuilder* lookup_if = &lookup_ifs[probe]; |
| 1839 | lookup_if->Initialize(this); |
| 1840 | int probe_base = probe * KeyedLookupCache::kEntryLength; |
| 1841 | HValue* map_index = AddUncasted<HAdd>( |
| 1842 | base_index, |
| 1843 | Add<HConstant>(probe_base + KeyedLookupCache::kMapIndex)); |
| 1844 | map_index->ClearFlag(HValue::kCanOverflow); |
| 1845 | HValue* key_index = AddUncasted<HAdd>( |
| 1846 | base_index, |
| 1847 | Add<HConstant>(probe_base + KeyedLookupCache::kKeyIndex)); |
| 1848 | key_index->ClearFlag(HValue::kCanOverflow); |
| 1849 | HValue* map_to_check = |
| 1850 | Add<HLoadKeyed>(cache_keys, map_index, static_cast<HValue*>(NULL), |
| 1851 | FAST_ELEMENTS, NEVER_RETURN_HOLE, 0); |
| 1852 | lookup_if->If<HCompareObjectEqAndBranch>(map_to_check, map); |
| 1853 | lookup_if->And(); |
| 1854 | HValue* key_to_check = |
| 1855 | Add<HLoadKeyed>(cache_keys, key_index, static_cast<HValue*>(NULL), |
| 1856 | FAST_ELEMENTS, NEVER_RETURN_HOLE, 0); |
| 1857 | lookup_if->If<HCompareObjectEqAndBranch>(key_to_check, key); |
| 1858 | lookup_if->Then(); |
| 1859 | { |
| 1860 | ExternalReference cache_field_offsets_ref = |
| 1861 | ExternalReference::keyed_lookup_cache_field_offsets(isolate()); |
| 1862 | HValue* cache_field_offsets = |
| 1863 | Add<HConstant>(cache_field_offsets_ref); |
| 1864 | HValue* index = AddUncasted<HAdd>(hash, Add<HConstant>(probe)); |
| 1865 | index->ClearFlag(HValue::kCanOverflow); |
| 1866 | HValue* property_index = Add<HLoadKeyed>( |
| 1867 | cache_field_offsets, index, static_cast<HValue*>(NULL), |
| 1868 | EXTERNAL_INT32_ELEMENTS, NEVER_RETURN_HOLE, 0); |
| 1869 | Push(property_index); |
| 1870 | } |
| 1871 | lookup_if->Else(); |
| 1872 | } |
| 1873 | for (int i = 0; i < KeyedLookupCache::kEntriesPerBucket; ++i) { |
| 1874 | lookup_ifs[i].JoinContinuation(&inline_or_runtime_continuation); |
| 1875 | } |
| 1876 | } |
| 1877 | |
| 1878 | IfBuilder inline_or_runtime(this, &inline_or_runtime_continuation); |
| 1879 | inline_or_runtime.Then(); |
| 1880 | { |
| 1881 | // Found a cached index, load property inline. |
| 1882 | Push(Add<HLoadFieldByIndex>(receiver, Pop())); |
| 1883 | } |
| 1884 | inline_or_runtime.Else(); |
| 1885 | { |
| 1886 | // KeyedLookupCache miss; call runtime. |
| 1887 | Add<HPushArguments>(receiver, key); |
| 1888 | Push(Add<HCallRuntime>( |
| 1889 | isolate()->factory()->empty_string(), |
| 1890 | Runtime::FunctionForId(Runtime::kKeyedGetProperty), 2)); |
| 1891 | } |
| 1892 | inline_or_runtime.End(); |
| 1893 | } |
| 1894 | if_dict_properties.End(); |
| 1895 | } |
| 1896 | index_name_split.End(); |
| 1897 | |
| 1898 | return Pop(); |
| 1899 | } |
| 1900 | |
| 1901 | |
| 1902 | Handle<Code> KeyedLoadGenericStub::GenerateCode() { |
| 1903 | return DoGenerateCode(this); |
| 1904 | } |
| 1905 | |
| 1906 | |
| 1907 | template <> |
| 1908 | HValue* CodeStubGraphBuilder<VectorLoadStub>::BuildCodeStub() { |
| 1909 | HValue* receiver = GetParameter(VectorLoadICDescriptor::kReceiverIndex); |
| 1910 | Add<HDeoptimize>("Always deopt", Deoptimizer::EAGER); |
| 1911 | return receiver; |
| 1912 | } |
| 1913 | |
| 1914 | |
| 1915 | Handle<Code> VectorLoadStub::GenerateCode() { return DoGenerateCode(this); } |
| 1916 | |
| 1917 | |
| 1918 | template <> |
| 1919 | HValue* CodeStubGraphBuilder<VectorKeyedLoadStub>::BuildCodeStub() { |
| 1920 | HValue* receiver = GetParameter(VectorLoadICDescriptor::kReceiverIndex); |
| 1921 | Add<HDeoptimize>("Always deopt", Deoptimizer::EAGER); |
| 1922 | return receiver; |
| 1923 | } |
| 1924 | |
| 1925 | |
| 1926 | Handle<Code> VectorKeyedLoadStub::GenerateCode() { |
| 1927 | return DoGenerateCode(this); |
| 1928 | } |
| 1929 | |
| 1930 | |
| 1931 | Handle<Code> MegamorphicLoadStub::GenerateCode() { |
| 1932 | return DoGenerateCode(this); |
| 1933 | } |
| 1934 | |
| 1935 | |
| 1936 | template <> |
| 1937 | HValue* CodeStubGraphBuilder<MegamorphicLoadStub>::BuildCodeStub() { |
| 1938 | // The return address is on the stack. |
| 1939 | HValue* receiver = GetParameter(LoadDescriptor::kReceiverIndex); |
| 1940 | HValue* name = GetParameter(LoadDescriptor::kNameIndex); |
| 1941 | |
| 1942 | // Probe the stub cache. |
| 1943 | Code::Flags flags = Code::RemoveTypeAndHolderFromFlags( |
| 1944 | Code::ComputeHandlerFlags(Code::LOAD_IC)); |
| 1945 | Add<HTailCallThroughMegamorphicCache>(receiver, name, flags); |
| 1946 | |
| 1947 | // We never continue. |
| 1948 | return graph()->GetConstant0(); |
| 1949 | } |
| 1950 | } } // namespace v8::internal |