Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +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 | #if V8_TARGET_ARCH_X87 |
| 6 | |
| 7 | #include "src/ast/scopes.h" |
| 8 | #include "src/code-factory.h" |
| 9 | #include "src/code-stubs.h" |
| 10 | #include "src/codegen.h" |
| 11 | #include "src/debug/debug.h" |
| 12 | #include "src/full-codegen/full-codegen.h" |
| 13 | #include "src/ic/ic.h" |
| 14 | #include "src/parsing/parser.h" |
| 15 | #include "src/x87/frames-x87.h" |
| 16 | |
| 17 | namespace v8 { |
| 18 | namespace internal { |
| 19 | |
| 20 | #define __ ACCESS_MASM(masm_) |
| 21 | |
| 22 | |
| 23 | class JumpPatchSite BASE_EMBEDDED { |
| 24 | public: |
| 25 | explicit JumpPatchSite(MacroAssembler* masm) : masm_(masm) { |
| 26 | #ifdef DEBUG |
| 27 | info_emitted_ = false; |
| 28 | #endif |
| 29 | } |
| 30 | |
| 31 | ~JumpPatchSite() { |
| 32 | DCHECK(patch_site_.is_bound() == info_emitted_); |
| 33 | } |
| 34 | |
| 35 | void EmitJumpIfNotSmi(Register reg, |
| 36 | Label* target, |
| 37 | Label::Distance distance = Label::kFar) { |
| 38 | __ test(reg, Immediate(kSmiTagMask)); |
| 39 | EmitJump(not_carry, target, distance); // Always taken before patched. |
| 40 | } |
| 41 | |
| 42 | void EmitJumpIfSmi(Register reg, |
| 43 | Label* target, |
| 44 | Label::Distance distance = Label::kFar) { |
| 45 | __ test(reg, Immediate(kSmiTagMask)); |
| 46 | EmitJump(carry, target, distance); // Never taken before patched. |
| 47 | } |
| 48 | |
| 49 | void EmitPatchInfo() { |
| 50 | if (patch_site_.is_bound()) { |
| 51 | int delta_to_patch_site = masm_->SizeOfCodeGeneratedSince(&patch_site_); |
| 52 | DCHECK(is_uint8(delta_to_patch_site)); |
| 53 | __ test(eax, Immediate(delta_to_patch_site)); |
| 54 | #ifdef DEBUG |
| 55 | info_emitted_ = true; |
| 56 | #endif |
| 57 | } else { |
| 58 | __ nop(); // Signals no inlined code. |
| 59 | } |
| 60 | } |
| 61 | |
| 62 | private: |
| 63 | // jc will be patched with jz, jnc will become jnz. |
| 64 | void EmitJump(Condition cc, Label* target, Label::Distance distance) { |
| 65 | DCHECK(!patch_site_.is_bound() && !info_emitted_); |
| 66 | DCHECK(cc == carry || cc == not_carry); |
| 67 | __ bind(&patch_site_); |
| 68 | __ j(cc, target, distance); |
| 69 | } |
| 70 | |
| 71 | MacroAssembler* masm_; |
| 72 | Label patch_site_; |
| 73 | #ifdef DEBUG |
| 74 | bool info_emitted_; |
| 75 | #endif |
| 76 | }; |
| 77 | |
| 78 | |
| 79 | // Generate code for a JS function. On entry to the function the receiver |
| 80 | // and arguments have been pushed on the stack left to right, with the |
| 81 | // return address on top of them. The actual argument count matches the |
| 82 | // formal parameter count expected by the function. |
| 83 | // |
| 84 | // The live registers are: |
| 85 | // o edi: the JS function object being called (i.e. ourselves) |
| 86 | // o edx: the new target value |
| 87 | // o esi: our context |
| 88 | // o ebp: our caller's frame pointer |
| 89 | // o esp: stack pointer (pointing to return address) |
| 90 | // |
| 91 | // The function builds a JS frame. Please see JavaScriptFrameConstants in |
| 92 | // frames-x87.h for its layout. |
| 93 | void FullCodeGenerator::Generate() { |
| 94 | CompilationInfo* info = info_; |
| 95 | profiling_counter_ = isolate()->factory()->NewCell( |
| 96 | Handle<Smi>(Smi::FromInt(FLAG_interrupt_budget), isolate())); |
| 97 | SetFunctionPosition(literal()); |
| 98 | Comment cmnt(masm_, "[ function compiled by full code generator"); |
| 99 | |
| 100 | ProfileEntryHookStub::MaybeCallEntryHook(masm_); |
| 101 | |
| 102 | #ifdef DEBUG |
| 103 | if (strlen(FLAG_stop_at) > 0 && |
| 104 | literal()->name()->IsUtf8EqualTo(CStrVector(FLAG_stop_at))) { |
| 105 | __ int3(); |
| 106 | } |
| 107 | #endif |
| 108 | |
| 109 | if (FLAG_debug_code && info->ExpectsJSReceiverAsReceiver()) { |
| 110 | int receiver_offset = (info->scope()->num_parameters() + 1) * kPointerSize; |
| 111 | __ mov(ecx, Operand(esp, receiver_offset)); |
| 112 | __ AssertNotSmi(ecx); |
| 113 | __ CmpObjectType(ecx, FIRST_JS_RECEIVER_TYPE, ecx); |
| 114 | __ Assert(above_equal, kSloppyFunctionExpectsJSReceiverReceiver); |
| 115 | } |
| 116 | |
| 117 | // Open a frame scope to indicate that there is a frame on the stack. The |
| 118 | // MANUAL indicates that the scope shouldn't actually generate code to set up |
| 119 | // the frame (that is done below). |
| 120 | FrameScope frame_scope(masm_, StackFrame::MANUAL); |
| 121 | |
| 122 | info->set_prologue_offset(masm_->pc_offset()); |
| 123 | __ Prologue(info->GeneratePreagedPrologue()); |
| 124 | |
| 125 | { Comment cmnt(masm_, "[ Allocate locals"); |
| 126 | int locals_count = info->scope()->num_stack_slots(); |
| 127 | // Generators allocate locals, if any, in context slots. |
| 128 | DCHECK(!IsGeneratorFunction(literal()->kind()) || locals_count == 0); |
| 129 | if (locals_count == 1) { |
| 130 | __ push(Immediate(isolate()->factory()->undefined_value())); |
| 131 | } else if (locals_count > 1) { |
| 132 | if (locals_count >= 128) { |
| 133 | Label ok; |
| 134 | __ mov(ecx, esp); |
| 135 | __ sub(ecx, Immediate(locals_count * kPointerSize)); |
| 136 | ExternalReference stack_limit = |
| 137 | ExternalReference::address_of_real_stack_limit(isolate()); |
| 138 | __ cmp(ecx, Operand::StaticVariable(stack_limit)); |
| 139 | __ j(above_equal, &ok, Label::kNear); |
| 140 | __ CallRuntime(Runtime::kThrowStackOverflow); |
| 141 | __ bind(&ok); |
| 142 | } |
| 143 | __ mov(eax, Immediate(isolate()->factory()->undefined_value())); |
| 144 | const int kMaxPushes = 32; |
| 145 | if (locals_count >= kMaxPushes) { |
| 146 | int loop_iterations = locals_count / kMaxPushes; |
| 147 | __ mov(ecx, loop_iterations); |
| 148 | Label loop_header; |
| 149 | __ bind(&loop_header); |
| 150 | // Do pushes. |
| 151 | for (int i = 0; i < kMaxPushes; i++) { |
| 152 | __ push(eax); |
| 153 | } |
| 154 | __ dec(ecx); |
| 155 | __ j(not_zero, &loop_header, Label::kNear); |
| 156 | } |
| 157 | int remaining = locals_count % kMaxPushes; |
| 158 | // Emit the remaining pushes. |
| 159 | for (int i = 0; i < remaining; i++) { |
| 160 | __ push(eax); |
| 161 | } |
| 162 | } |
| 163 | } |
| 164 | |
| 165 | bool function_in_register = true; |
| 166 | |
| 167 | // Possibly allocate a local context. |
| 168 | if (info->scope()->num_heap_slots() > 0) { |
| 169 | Comment cmnt(masm_, "[ Allocate context"); |
| 170 | bool need_write_barrier = true; |
| 171 | int slots = info->scope()->num_heap_slots() - Context::MIN_CONTEXT_SLOTS; |
| 172 | // Argument to NewContext is the function, which is still in edi. |
| 173 | if (info->scope()->is_script_scope()) { |
| 174 | __ push(edi); |
| 175 | __ Push(info->scope()->GetScopeInfo(info->isolate())); |
| 176 | __ CallRuntime(Runtime::kNewScriptContext); |
| 177 | PrepareForBailoutForId(BailoutId::ScriptContext(), TOS_REG); |
| 178 | // The new target value is not used, clobbering is safe. |
| 179 | DCHECK_NULL(info->scope()->new_target_var()); |
| 180 | } else { |
| 181 | if (info->scope()->new_target_var() != nullptr) { |
| 182 | __ push(edx); // Preserve new target. |
| 183 | } |
| 184 | if (slots <= FastNewContextStub::kMaximumSlots) { |
| 185 | FastNewContextStub stub(isolate(), slots); |
| 186 | __ CallStub(&stub); |
| 187 | // Result of FastNewContextStub is always in new space. |
| 188 | need_write_barrier = false; |
| 189 | } else { |
| 190 | __ push(edi); |
| 191 | __ CallRuntime(Runtime::kNewFunctionContext); |
| 192 | } |
| 193 | if (info->scope()->new_target_var() != nullptr) { |
| 194 | __ pop(edx); // Restore new target. |
| 195 | } |
| 196 | } |
| 197 | function_in_register = false; |
| 198 | // Context is returned in eax. It replaces the context passed to us. |
| 199 | // It's saved in the stack and kept live in esi. |
| 200 | __ mov(esi, eax); |
| 201 | __ mov(Operand(ebp, StandardFrameConstants::kContextOffset), eax); |
| 202 | |
| 203 | // Copy parameters into context if necessary. |
| 204 | int num_parameters = info->scope()->num_parameters(); |
| 205 | int first_parameter = info->scope()->has_this_declaration() ? -1 : 0; |
| 206 | for (int i = first_parameter; i < num_parameters; i++) { |
| 207 | Variable* var = (i == -1) ? scope()->receiver() : scope()->parameter(i); |
| 208 | if (var->IsContextSlot()) { |
| 209 | int parameter_offset = StandardFrameConstants::kCallerSPOffset + |
| 210 | (num_parameters - 1 - i) * kPointerSize; |
| 211 | // Load parameter from stack. |
| 212 | __ mov(eax, Operand(ebp, parameter_offset)); |
| 213 | // Store it in the context. |
| 214 | int context_offset = Context::SlotOffset(var->index()); |
| 215 | __ mov(Operand(esi, context_offset), eax); |
| 216 | // Update the write barrier. This clobbers eax and ebx. |
| 217 | if (need_write_barrier) { |
| 218 | __ RecordWriteContextSlot(esi, context_offset, eax, ebx, |
| 219 | kDontSaveFPRegs); |
| 220 | } else if (FLAG_debug_code) { |
| 221 | Label done; |
| 222 | __ JumpIfInNewSpace(esi, eax, &done, Label::kNear); |
| 223 | __ Abort(kExpectedNewSpaceObject); |
| 224 | __ bind(&done); |
| 225 | } |
| 226 | } |
| 227 | } |
| 228 | } |
| 229 | |
| 230 | // Register holding this function and new target are both trashed in case we |
| 231 | // bailout here. But since that can happen only when new target is not used |
| 232 | // and we allocate a context, the value of |function_in_register| is correct. |
| 233 | PrepareForBailoutForId(BailoutId::FunctionContext(), NO_REGISTERS); |
| 234 | |
| 235 | // Possibly set up a local binding to the this function which is used in |
| 236 | // derived constructors with super calls. |
| 237 | Variable* this_function_var = scope()->this_function_var(); |
| 238 | if (this_function_var != nullptr) { |
| 239 | Comment cmnt(masm_, "[ This function"); |
| 240 | if (!function_in_register) { |
| 241 | __ mov(edi, Operand(ebp, JavaScriptFrameConstants::kFunctionOffset)); |
| 242 | // The write barrier clobbers register again, keep it marked as such. |
| 243 | } |
| 244 | SetVar(this_function_var, edi, ebx, ecx); |
| 245 | } |
| 246 | |
| 247 | // Possibly set up a local binding to the new target value. |
| 248 | Variable* new_target_var = scope()->new_target_var(); |
| 249 | if (new_target_var != nullptr) { |
| 250 | Comment cmnt(masm_, "[ new.target"); |
| 251 | SetVar(new_target_var, edx, ebx, ecx); |
| 252 | } |
| 253 | |
| 254 | // Possibly allocate RestParameters |
| 255 | int rest_index; |
| 256 | Variable* rest_param = scope()->rest_parameter(&rest_index); |
| 257 | if (rest_param) { |
| 258 | Comment cmnt(masm_, "[ Allocate rest parameter array"); |
| 259 | |
| 260 | int num_parameters = info->scope()->num_parameters(); |
| 261 | int offset = num_parameters * kPointerSize; |
| 262 | |
| 263 | __ mov(RestParamAccessDescriptor::parameter_count(), |
| 264 | Immediate(Smi::FromInt(num_parameters))); |
| 265 | __ lea(RestParamAccessDescriptor::parameter_pointer(), |
| 266 | Operand(ebp, StandardFrameConstants::kCallerSPOffset + offset)); |
| 267 | __ mov(RestParamAccessDescriptor::rest_parameter_index(), |
| 268 | Immediate(Smi::FromInt(rest_index))); |
| 269 | function_in_register = false; |
| 270 | |
| 271 | RestParamAccessStub stub(isolate()); |
| 272 | __ CallStub(&stub); |
| 273 | SetVar(rest_param, eax, ebx, edx); |
| 274 | } |
| 275 | |
| 276 | Variable* arguments = scope()->arguments(); |
| 277 | if (arguments != NULL) { |
| 278 | // Function uses arguments object. |
| 279 | Comment cmnt(masm_, "[ Allocate arguments object"); |
| 280 | DCHECK(edi.is(ArgumentsAccessNewDescriptor::function())); |
| 281 | if (!function_in_register) { |
| 282 | __ mov(edi, Operand(ebp, JavaScriptFrameConstants::kFunctionOffset)); |
| 283 | } |
| 284 | // Receiver is just before the parameters on the caller's stack. |
| 285 | int num_parameters = info->scope()->num_parameters(); |
| 286 | int offset = num_parameters * kPointerSize; |
| 287 | __ mov(ArgumentsAccessNewDescriptor::parameter_count(), |
| 288 | Immediate(Smi::FromInt(num_parameters))); |
| 289 | __ lea(ArgumentsAccessNewDescriptor::parameter_pointer(), |
| 290 | Operand(ebp, StandardFrameConstants::kCallerSPOffset + offset)); |
| 291 | |
| 292 | // Arguments to ArgumentsAccessStub: |
| 293 | // function, parameter pointer, parameter count. |
| 294 | // The stub will rewrite parameter pointer and parameter count if the |
| 295 | // previous stack frame was an arguments adapter frame. |
| 296 | bool is_unmapped = is_strict(language_mode()) || !has_simple_parameters(); |
| 297 | ArgumentsAccessStub::Type type = ArgumentsAccessStub::ComputeType( |
| 298 | is_unmapped, literal()->has_duplicate_parameters()); |
| 299 | ArgumentsAccessStub stub(isolate(), type); |
| 300 | __ CallStub(&stub); |
| 301 | |
| 302 | SetVar(arguments, eax, ebx, edx); |
| 303 | } |
| 304 | |
| 305 | if (FLAG_trace) { |
| 306 | __ CallRuntime(Runtime::kTraceEnter); |
| 307 | } |
| 308 | |
| 309 | // Visit the declarations and body unless there is an illegal |
| 310 | // redeclaration. |
| 311 | if (scope()->HasIllegalRedeclaration()) { |
| 312 | Comment cmnt(masm_, "[ Declarations"); |
| 313 | VisitForEffect(scope()->GetIllegalRedeclaration()); |
| 314 | |
| 315 | } else { |
| 316 | PrepareForBailoutForId(BailoutId::FunctionEntry(), NO_REGISTERS); |
| 317 | { Comment cmnt(masm_, "[ Declarations"); |
| 318 | VisitDeclarations(scope()->declarations()); |
| 319 | } |
| 320 | |
| 321 | // Assert that the declarations do not use ICs. Otherwise the debugger |
| 322 | // won't be able to redirect a PC at an IC to the correct IC in newly |
| 323 | // recompiled code. |
| 324 | DCHECK_EQ(0, ic_total_count_); |
| 325 | |
| 326 | { Comment cmnt(masm_, "[ Stack check"); |
| 327 | PrepareForBailoutForId(BailoutId::Declarations(), NO_REGISTERS); |
| 328 | Label ok; |
| 329 | ExternalReference stack_limit |
| 330 | = ExternalReference::address_of_stack_limit(isolate()); |
| 331 | __ cmp(esp, Operand::StaticVariable(stack_limit)); |
| 332 | __ j(above_equal, &ok, Label::kNear); |
| 333 | __ call(isolate()->builtins()->StackCheck(), RelocInfo::CODE_TARGET); |
| 334 | __ bind(&ok); |
| 335 | } |
| 336 | |
| 337 | { Comment cmnt(masm_, "[ Body"); |
| 338 | DCHECK(loop_depth() == 0); |
| 339 | VisitStatements(literal()->body()); |
| 340 | DCHECK(loop_depth() == 0); |
| 341 | } |
| 342 | } |
| 343 | |
| 344 | // Always emit a 'return undefined' in case control fell off the end of |
| 345 | // the body. |
| 346 | { Comment cmnt(masm_, "[ return <undefined>;"); |
| 347 | __ mov(eax, isolate()->factory()->undefined_value()); |
| 348 | EmitReturnSequence(); |
| 349 | } |
| 350 | } |
| 351 | |
| 352 | |
| 353 | void FullCodeGenerator::ClearAccumulator() { |
| 354 | __ Move(eax, Immediate(Smi::FromInt(0))); |
| 355 | } |
| 356 | |
| 357 | |
| 358 | void FullCodeGenerator::EmitProfilingCounterDecrement(int delta) { |
| 359 | __ mov(ebx, Immediate(profiling_counter_)); |
| 360 | __ sub(FieldOperand(ebx, Cell::kValueOffset), |
| 361 | Immediate(Smi::FromInt(delta))); |
| 362 | } |
| 363 | |
| 364 | |
| 365 | void FullCodeGenerator::EmitProfilingCounterReset() { |
| 366 | int reset_value = FLAG_interrupt_budget; |
| 367 | __ mov(ebx, Immediate(profiling_counter_)); |
| 368 | __ mov(FieldOperand(ebx, Cell::kValueOffset), |
| 369 | Immediate(Smi::FromInt(reset_value))); |
| 370 | } |
| 371 | |
| 372 | |
| 373 | void FullCodeGenerator::EmitBackEdgeBookkeeping(IterationStatement* stmt, |
| 374 | Label* back_edge_target) { |
| 375 | Comment cmnt(masm_, "[ Back edge bookkeeping"); |
| 376 | Label ok; |
| 377 | |
| 378 | DCHECK(back_edge_target->is_bound()); |
| 379 | int distance = masm_->SizeOfCodeGeneratedSince(back_edge_target); |
| 380 | int weight = Min(kMaxBackEdgeWeight, |
| 381 | Max(1, distance / kCodeSizeMultiplier)); |
| 382 | EmitProfilingCounterDecrement(weight); |
| 383 | __ j(positive, &ok, Label::kNear); |
| 384 | __ call(isolate()->builtins()->InterruptCheck(), RelocInfo::CODE_TARGET); |
| 385 | |
| 386 | // Record a mapping of this PC offset to the OSR id. This is used to find |
| 387 | // the AST id from the unoptimized code in order to use it as a key into |
| 388 | // the deoptimization input data found in the optimized code. |
| 389 | RecordBackEdge(stmt->OsrEntryId()); |
| 390 | |
| 391 | EmitProfilingCounterReset(); |
| 392 | |
| 393 | __ bind(&ok); |
| 394 | PrepareForBailoutForId(stmt->EntryId(), NO_REGISTERS); |
| 395 | // Record a mapping of the OSR id to this PC. This is used if the OSR |
| 396 | // entry becomes the target of a bailout. We don't expect it to be, but |
| 397 | // we want it to work if it is. |
| 398 | PrepareForBailoutForId(stmt->OsrEntryId(), NO_REGISTERS); |
| 399 | } |
| 400 | |
| 401 | |
| 402 | void FullCodeGenerator::EmitReturnSequence() { |
| 403 | Comment cmnt(masm_, "[ Return sequence"); |
| 404 | if (return_label_.is_bound()) { |
| 405 | __ jmp(&return_label_); |
| 406 | } else { |
| 407 | // Common return label |
| 408 | __ bind(&return_label_); |
| 409 | if (FLAG_trace) { |
| 410 | __ push(eax); |
| 411 | __ CallRuntime(Runtime::kTraceExit); |
| 412 | } |
| 413 | // Pretend that the exit is a backwards jump to the entry. |
| 414 | int weight = 1; |
| 415 | if (info_->ShouldSelfOptimize()) { |
| 416 | weight = FLAG_interrupt_budget / FLAG_self_opt_count; |
| 417 | } else { |
| 418 | int distance = masm_->pc_offset(); |
| 419 | weight = Min(kMaxBackEdgeWeight, |
| 420 | Max(1, distance / kCodeSizeMultiplier)); |
| 421 | } |
| 422 | EmitProfilingCounterDecrement(weight); |
| 423 | Label ok; |
| 424 | __ j(positive, &ok, Label::kNear); |
| 425 | __ push(eax); |
| 426 | __ call(isolate()->builtins()->InterruptCheck(), |
| 427 | RelocInfo::CODE_TARGET); |
| 428 | __ pop(eax); |
| 429 | EmitProfilingCounterReset(); |
| 430 | __ bind(&ok); |
| 431 | |
| 432 | SetReturnPosition(literal()); |
| 433 | __ leave(); |
| 434 | |
| 435 | int arg_count = info_->scope()->num_parameters() + 1; |
| 436 | int arguments_bytes = arg_count * kPointerSize; |
| 437 | __ Ret(arguments_bytes, ecx); |
| 438 | } |
| 439 | } |
| 440 | |
| 441 | |
| 442 | void FullCodeGenerator::StackValueContext::Plug(Variable* var) const { |
| 443 | DCHECK(var->IsStackAllocated() || var->IsContextSlot()); |
| 444 | MemOperand operand = codegen()->VarOperand(var, result_register()); |
| 445 | // Memory operands can be pushed directly. |
| 446 | __ push(operand); |
| 447 | } |
| 448 | |
| 449 | |
| 450 | void FullCodeGenerator::EffectContext::Plug(Heap::RootListIndex index) const { |
| 451 | UNREACHABLE(); // Not used on X87. |
| 452 | } |
| 453 | |
| 454 | |
| 455 | void FullCodeGenerator::AccumulatorValueContext::Plug( |
| 456 | Heap::RootListIndex index) const { |
| 457 | UNREACHABLE(); // Not used on X87. |
| 458 | } |
| 459 | |
| 460 | |
| 461 | void FullCodeGenerator::StackValueContext::Plug( |
| 462 | Heap::RootListIndex index) const { |
| 463 | UNREACHABLE(); // Not used on X87. |
| 464 | } |
| 465 | |
| 466 | |
| 467 | void FullCodeGenerator::TestContext::Plug(Heap::RootListIndex index) const { |
| 468 | UNREACHABLE(); // Not used on X87. |
| 469 | } |
| 470 | |
| 471 | |
| 472 | void FullCodeGenerator::EffectContext::Plug(Handle<Object> lit) const { |
| 473 | } |
| 474 | |
| 475 | |
| 476 | void FullCodeGenerator::AccumulatorValueContext::Plug( |
| 477 | Handle<Object> lit) const { |
| 478 | if (lit->IsSmi()) { |
| 479 | __ SafeMove(result_register(), Immediate(lit)); |
| 480 | } else { |
| 481 | __ Move(result_register(), Immediate(lit)); |
| 482 | } |
| 483 | } |
| 484 | |
| 485 | |
| 486 | void FullCodeGenerator::StackValueContext::Plug(Handle<Object> lit) const { |
| 487 | if (lit->IsSmi()) { |
| 488 | __ SafePush(Immediate(lit)); |
| 489 | } else { |
| 490 | __ push(Immediate(lit)); |
| 491 | } |
| 492 | } |
| 493 | |
| 494 | |
| 495 | void FullCodeGenerator::TestContext::Plug(Handle<Object> lit) const { |
| 496 | codegen()->PrepareForBailoutBeforeSplit(condition(), |
| 497 | true, |
| 498 | true_label_, |
| 499 | false_label_); |
| 500 | DCHECK(!lit->IsUndetectableObject()); // There are no undetectable literals. |
| 501 | if (lit->IsUndefined() || lit->IsNull() || lit->IsFalse()) { |
| 502 | if (false_label_ != fall_through_) __ jmp(false_label_); |
| 503 | } else if (lit->IsTrue() || lit->IsJSObject()) { |
| 504 | if (true_label_ != fall_through_) __ jmp(true_label_); |
| 505 | } else if (lit->IsString()) { |
| 506 | if (String::cast(*lit)->length() == 0) { |
| 507 | if (false_label_ != fall_through_) __ jmp(false_label_); |
| 508 | } else { |
| 509 | if (true_label_ != fall_through_) __ jmp(true_label_); |
| 510 | } |
| 511 | } else if (lit->IsSmi()) { |
| 512 | if (Smi::cast(*lit)->value() == 0) { |
| 513 | if (false_label_ != fall_through_) __ jmp(false_label_); |
| 514 | } else { |
| 515 | if (true_label_ != fall_through_) __ jmp(true_label_); |
| 516 | } |
| 517 | } else { |
| 518 | // For simplicity we always test the accumulator register. |
| 519 | __ mov(result_register(), lit); |
| 520 | codegen()->DoTest(this); |
| 521 | } |
| 522 | } |
| 523 | |
| 524 | |
| 525 | void FullCodeGenerator::EffectContext::DropAndPlug(int count, |
| 526 | Register reg) const { |
| 527 | DCHECK(count > 0); |
| 528 | __ Drop(count); |
| 529 | } |
| 530 | |
| 531 | |
| 532 | void FullCodeGenerator::AccumulatorValueContext::DropAndPlug( |
| 533 | int count, |
| 534 | Register reg) const { |
| 535 | DCHECK(count > 0); |
| 536 | __ Drop(count); |
| 537 | __ Move(result_register(), reg); |
| 538 | } |
| 539 | |
| 540 | |
| 541 | void FullCodeGenerator::StackValueContext::DropAndPlug(int count, |
| 542 | Register reg) const { |
| 543 | DCHECK(count > 0); |
| 544 | if (count > 1) __ Drop(count - 1); |
| 545 | __ mov(Operand(esp, 0), reg); |
| 546 | } |
| 547 | |
| 548 | |
| 549 | void FullCodeGenerator::TestContext::DropAndPlug(int count, |
| 550 | Register reg) const { |
| 551 | DCHECK(count > 0); |
| 552 | // For simplicity we always test the accumulator register. |
| 553 | __ Drop(count); |
| 554 | __ Move(result_register(), reg); |
| 555 | codegen()->PrepareForBailoutBeforeSplit(condition(), false, NULL, NULL); |
| 556 | codegen()->DoTest(this); |
| 557 | } |
| 558 | |
| 559 | |
| 560 | void FullCodeGenerator::EffectContext::Plug(Label* materialize_true, |
| 561 | Label* materialize_false) const { |
| 562 | DCHECK(materialize_true == materialize_false); |
| 563 | __ bind(materialize_true); |
| 564 | } |
| 565 | |
| 566 | |
| 567 | void FullCodeGenerator::AccumulatorValueContext::Plug( |
| 568 | Label* materialize_true, |
| 569 | Label* materialize_false) const { |
| 570 | Label done; |
| 571 | __ bind(materialize_true); |
| 572 | __ mov(result_register(), isolate()->factory()->true_value()); |
| 573 | __ jmp(&done, Label::kNear); |
| 574 | __ bind(materialize_false); |
| 575 | __ mov(result_register(), isolate()->factory()->false_value()); |
| 576 | __ bind(&done); |
| 577 | } |
| 578 | |
| 579 | |
| 580 | void FullCodeGenerator::StackValueContext::Plug( |
| 581 | Label* materialize_true, |
| 582 | Label* materialize_false) const { |
| 583 | Label done; |
| 584 | __ bind(materialize_true); |
| 585 | __ push(Immediate(isolate()->factory()->true_value())); |
| 586 | __ jmp(&done, Label::kNear); |
| 587 | __ bind(materialize_false); |
| 588 | __ push(Immediate(isolate()->factory()->false_value())); |
| 589 | __ bind(&done); |
| 590 | } |
| 591 | |
| 592 | |
| 593 | void FullCodeGenerator::TestContext::Plug(Label* materialize_true, |
| 594 | Label* materialize_false) const { |
| 595 | DCHECK(materialize_true == true_label_); |
| 596 | DCHECK(materialize_false == false_label_); |
| 597 | } |
| 598 | |
| 599 | |
| 600 | void FullCodeGenerator::AccumulatorValueContext::Plug(bool flag) const { |
| 601 | Handle<Object> value = flag |
| 602 | ? isolate()->factory()->true_value() |
| 603 | : isolate()->factory()->false_value(); |
| 604 | __ mov(result_register(), value); |
| 605 | } |
| 606 | |
| 607 | |
| 608 | void FullCodeGenerator::StackValueContext::Plug(bool flag) const { |
| 609 | Handle<Object> value = flag |
| 610 | ? isolate()->factory()->true_value() |
| 611 | : isolate()->factory()->false_value(); |
| 612 | __ push(Immediate(value)); |
| 613 | } |
| 614 | |
| 615 | |
| 616 | void FullCodeGenerator::TestContext::Plug(bool flag) const { |
| 617 | codegen()->PrepareForBailoutBeforeSplit(condition(), |
| 618 | true, |
| 619 | true_label_, |
| 620 | false_label_); |
| 621 | if (flag) { |
| 622 | if (true_label_ != fall_through_) __ jmp(true_label_); |
| 623 | } else { |
| 624 | if (false_label_ != fall_through_) __ jmp(false_label_); |
| 625 | } |
| 626 | } |
| 627 | |
| 628 | |
| 629 | void FullCodeGenerator::DoTest(Expression* condition, |
| 630 | Label* if_true, |
| 631 | Label* if_false, |
| 632 | Label* fall_through) { |
| 633 | Handle<Code> ic = ToBooleanStub::GetUninitialized(isolate()); |
| 634 | CallIC(ic, condition->test_id()); |
| 635 | __ CompareRoot(result_register(), Heap::kTrueValueRootIndex); |
| 636 | Split(equal, if_true, if_false, fall_through); |
| 637 | } |
| 638 | |
| 639 | |
| 640 | void FullCodeGenerator::Split(Condition cc, |
| 641 | Label* if_true, |
| 642 | Label* if_false, |
| 643 | Label* fall_through) { |
| 644 | if (if_false == fall_through) { |
| 645 | __ j(cc, if_true); |
| 646 | } else if (if_true == fall_through) { |
| 647 | __ j(NegateCondition(cc), if_false); |
| 648 | } else { |
| 649 | __ j(cc, if_true); |
| 650 | __ jmp(if_false); |
| 651 | } |
| 652 | } |
| 653 | |
| 654 | |
| 655 | MemOperand FullCodeGenerator::StackOperand(Variable* var) { |
| 656 | DCHECK(var->IsStackAllocated()); |
| 657 | // Offset is negative because higher indexes are at lower addresses. |
| 658 | int offset = -var->index() * kPointerSize; |
| 659 | // Adjust by a (parameter or local) base offset. |
| 660 | if (var->IsParameter()) { |
| 661 | offset += (info_->scope()->num_parameters() + 1) * kPointerSize; |
| 662 | } else { |
| 663 | offset += JavaScriptFrameConstants::kLocal0Offset; |
| 664 | } |
| 665 | return Operand(ebp, offset); |
| 666 | } |
| 667 | |
| 668 | |
| 669 | MemOperand FullCodeGenerator::VarOperand(Variable* var, Register scratch) { |
| 670 | DCHECK(var->IsContextSlot() || var->IsStackAllocated()); |
| 671 | if (var->IsContextSlot()) { |
| 672 | int context_chain_length = scope()->ContextChainLength(var->scope()); |
| 673 | __ LoadContext(scratch, context_chain_length); |
| 674 | return ContextOperand(scratch, var->index()); |
| 675 | } else { |
| 676 | return StackOperand(var); |
| 677 | } |
| 678 | } |
| 679 | |
| 680 | |
| 681 | void FullCodeGenerator::GetVar(Register dest, Variable* var) { |
| 682 | DCHECK(var->IsContextSlot() || var->IsStackAllocated()); |
| 683 | MemOperand location = VarOperand(var, dest); |
| 684 | __ mov(dest, location); |
| 685 | } |
| 686 | |
| 687 | |
| 688 | void FullCodeGenerator::SetVar(Variable* var, |
| 689 | Register src, |
| 690 | Register scratch0, |
| 691 | Register scratch1) { |
| 692 | DCHECK(var->IsContextSlot() || var->IsStackAllocated()); |
| 693 | DCHECK(!scratch0.is(src)); |
| 694 | DCHECK(!scratch0.is(scratch1)); |
| 695 | DCHECK(!scratch1.is(src)); |
| 696 | MemOperand location = VarOperand(var, scratch0); |
| 697 | __ mov(location, src); |
| 698 | |
| 699 | // Emit the write barrier code if the location is in the heap. |
| 700 | if (var->IsContextSlot()) { |
| 701 | int offset = Context::SlotOffset(var->index()); |
| 702 | DCHECK(!scratch0.is(esi) && !src.is(esi) && !scratch1.is(esi)); |
| 703 | __ RecordWriteContextSlot(scratch0, offset, src, scratch1, kDontSaveFPRegs); |
| 704 | } |
| 705 | } |
| 706 | |
| 707 | |
| 708 | void FullCodeGenerator::PrepareForBailoutBeforeSplit(Expression* expr, |
| 709 | bool should_normalize, |
| 710 | Label* if_true, |
| 711 | Label* if_false) { |
| 712 | // Only prepare for bailouts before splits if we're in a test |
| 713 | // context. Otherwise, we let the Visit function deal with the |
| 714 | // preparation to avoid preparing with the same AST id twice. |
| 715 | if (!context()->IsTest()) return; |
| 716 | |
| 717 | Label skip; |
| 718 | if (should_normalize) __ jmp(&skip, Label::kNear); |
| 719 | PrepareForBailout(expr, TOS_REG); |
| 720 | if (should_normalize) { |
| 721 | __ cmp(eax, isolate()->factory()->true_value()); |
| 722 | Split(equal, if_true, if_false, NULL); |
| 723 | __ bind(&skip); |
| 724 | } |
| 725 | } |
| 726 | |
| 727 | |
| 728 | void FullCodeGenerator::EmitDebugCheckDeclarationContext(Variable* variable) { |
| 729 | // The variable in the declaration always resides in the current context. |
| 730 | DCHECK_EQ(0, scope()->ContextChainLength(variable->scope())); |
| 731 | if (generate_debug_code_) { |
| 732 | // Check that we're not inside a with or catch context. |
| 733 | __ mov(ebx, FieldOperand(esi, HeapObject::kMapOffset)); |
| 734 | __ cmp(ebx, isolate()->factory()->with_context_map()); |
| 735 | __ Check(not_equal, kDeclarationInWithContext); |
| 736 | __ cmp(ebx, isolate()->factory()->catch_context_map()); |
| 737 | __ Check(not_equal, kDeclarationInCatchContext); |
| 738 | } |
| 739 | } |
| 740 | |
| 741 | |
| 742 | void FullCodeGenerator::VisitVariableDeclaration( |
| 743 | VariableDeclaration* declaration) { |
| 744 | // If it was not possible to allocate the variable at compile time, we |
| 745 | // need to "declare" it at runtime to make sure it actually exists in the |
| 746 | // local context. |
| 747 | VariableProxy* proxy = declaration->proxy(); |
| 748 | VariableMode mode = declaration->mode(); |
| 749 | Variable* variable = proxy->var(); |
| 750 | bool hole_init = mode == LET || mode == CONST || mode == CONST_LEGACY; |
| 751 | switch (variable->location()) { |
| 752 | case VariableLocation::GLOBAL: |
| 753 | case VariableLocation::UNALLOCATED: |
| 754 | globals_->Add(variable->name(), zone()); |
| 755 | globals_->Add(variable->binding_needs_init() |
| 756 | ? isolate()->factory()->the_hole_value() |
| 757 | : isolate()->factory()->undefined_value(), zone()); |
| 758 | break; |
| 759 | |
| 760 | case VariableLocation::PARAMETER: |
| 761 | case VariableLocation::LOCAL: |
| 762 | if (hole_init) { |
| 763 | Comment cmnt(masm_, "[ VariableDeclaration"); |
| 764 | __ mov(StackOperand(variable), |
| 765 | Immediate(isolate()->factory()->the_hole_value())); |
| 766 | } |
| 767 | break; |
| 768 | |
| 769 | case VariableLocation::CONTEXT: |
| 770 | if (hole_init) { |
| 771 | Comment cmnt(masm_, "[ VariableDeclaration"); |
| 772 | EmitDebugCheckDeclarationContext(variable); |
| 773 | __ mov(ContextOperand(esi, variable->index()), |
| 774 | Immediate(isolate()->factory()->the_hole_value())); |
| 775 | // No write barrier since the hole value is in old space. |
| 776 | PrepareForBailoutForId(proxy->id(), NO_REGISTERS); |
| 777 | } |
| 778 | break; |
| 779 | |
| 780 | case VariableLocation::LOOKUP: { |
| 781 | Comment cmnt(masm_, "[ VariableDeclaration"); |
| 782 | __ push(Immediate(variable->name())); |
| 783 | // VariableDeclaration nodes are always introduced in one of four modes. |
| 784 | DCHECK(IsDeclaredVariableMode(mode)); |
| 785 | // Push initial value, if any. |
| 786 | // Note: For variables we must not push an initial value (such as |
| 787 | // 'undefined') because we may have a (legal) redeclaration and we |
| 788 | // must not destroy the current value. |
| 789 | if (hole_init) { |
| 790 | __ push(Immediate(isolate()->factory()->the_hole_value())); |
| 791 | } else { |
| 792 | __ push(Immediate(Smi::FromInt(0))); // Indicates no initial value. |
| 793 | } |
| 794 | __ push( |
| 795 | Immediate(Smi::FromInt(variable->DeclarationPropertyAttributes()))); |
| 796 | __ CallRuntime(Runtime::kDeclareLookupSlot); |
| 797 | break; |
| 798 | } |
| 799 | } |
| 800 | } |
| 801 | |
| 802 | void FullCodeGenerator::VisitFunctionDeclaration( |
| 803 | FunctionDeclaration* declaration) { |
| 804 | VariableProxy* proxy = declaration->proxy(); |
| 805 | Variable* variable = proxy->var(); |
| 806 | switch (variable->location()) { |
| 807 | case VariableLocation::GLOBAL: |
| 808 | case VariableLocation::UNALLOCATED: { |
| 809 | globals_->Add(variable->name(), zone()); |
| 810 | Handle<SharedFunctionInfo> function = |
| 811 | Compiler::GetSharedFunctionInfo(declaration->fun(), script(), info_); |
| 812 | // Check for stack-overflow exception. |
| 813 | if (function.is_null()) return SetStackOverflow(); |
| 814 | globals_->Add(function, zone()); |
| 815 | break; |
| 816 | } |
| 817 | |
| 818 | case VariableLocation::PARAMETER: |
| 819 | case VariableLocation::LOCAL: { |
| 820 | Comment cmnt(masm_, "[ FunctionDeclaration"); |
| 821 | VisitForAccumulatorValue(declaration->fun()); |
| 822 | __ mov(StackOperand(variable), result_register()); |
| 823 | break; |
| 824 | } |
| 825 | |
| 826 | case VariableLocation::CONTEXT: { |
| 827 | Comment cmnt(masm_, "[ FunctionDeclaration"); |
| 828 | EmitDebugCheckDeclarationContext(variable); |
| 829 | VisitForAccumulatorValue(declaration->fun()); |
| 830 | __ mov(ContextOperand(esi, variable->index()), result_register()); |
| 831 | // We know that we have written a function, which is not a smi. |
| 832 | __ RecordWriteContextSlot(esi, Context::SlotOffset(variable->index()), |
| 833 | result_register(), ecx, kDontSaveFPRegs, |
| 834 | EMIT_REMEMBERED_SET, OMIT_SMI_CHECK); |
| 835 | PrepareForBailoutForId(proxy->id(), NO_REGISTERS); |
| 836 | break; |
| 837 | } |
| 838 | |
| 839 | case VariableLocation::LOOKUP: { |
| 840 | Comment cmnt(masm_, "[ FunctionDeclaration"); |
| 841 | __ push(Immediate(variable->name())); |
| 842 | VisitForStackValue(declaration->fun()); |
| 843 | __ push( |
| 844 | Immediate(Smi::FromInt(variable->DeclarationPropertyAttributes()))); |
| 845 | __ CallRuntime(Runtime::kDeclareLookupSlot); |
| 846 | break; |
| 847 | } |
| 848 | } |
| 849 | } |
| 850 | |
| 851 | |
| 852 | void FullCodeGenerator::DeclareGlobals(Handle<FixedArray> pairs) { |
| 853 | // Call the runtime to declare the globals. |
| 854 | __ Push(pairs); |
| 855 | __ Push(Smi::FromInt(DeclareGlobalsFlags())); |
| 856 | __ CallRuntime(Runtime::kDeclareGlobals); |
| 857 | // Return value is ignored. |
| 858 | } |
| 859 | |
| 860 | |
| 861 | void FullCodeGenerator::DeclareModules(Handle<FixedArray> descriptions) { |
| 862 | // Call the runtime to declare the modules. |
| 863 | __ Push(descriptions); |
| 864 | __ CallRuntime(Runtime::kDeclareModules); |
| 865 | // Return value is ignored. |
| 866 | } |
| 867 | |
| 868 | |
| 869 | void FullCodeGenerator::VisitSwitchStatement(SwitchStatement* stmt) { |
| 870 | Comment cmnt(masm_, "[ SwitchStatement"); |
| 871 | Breakable nested_statement(this, stmt); |
| 872 | SetStatementPosition(stmt); |
| 873 | |
| 874 | // Keep the switch value on the stack until a case matches. |
| 875 | VisitForStackValue(stmt->tag()); |
| 876 | PrepareForBailoutForId(stmt->EntryId(), NO_REGISTERS); |
| 877 | |
| 878 | ZoneList<CaseClause*>* clauses = stmt->cases(); |
| 879 | CaseClause* default_clause = NULL; // Can occur anywhere in the list. |
| 880 | |
| 881 | Label next_test; // Recycled for each test. |
| 882 | // Compile all the tests with branches to their bodies. |
| 883 | for (int i = 0; i < clauses->length(); i++) { |
| 884 | CaseClause* clause = clauses->at(i); |
| 885 | clause->body_target()->Unuse(); |
| 886 | |
| 887 | // The default is not a test, but remember it as final fall through. |
| 888 | if (clause->is_default()) { |
| 889 | default_clause = clause; |
| 890 | continue; |
| 891 | } |
| 892 | |
| 893 | Comment cmnt(masm_, "[ Case comparison"); |
| 894 | __ bind(&next_test); |
| 895 | next_test.Unuse(); |
| 896 | |
| 897 | // Compile the label expression. |
| 898 | VisitForAccumulatorValue(clause->label()); |
| 899 | |
| 900 | // Perform the comparison as if via '==='. |
| 901 | __ mov(edx, Operand(esp, 0)); // Switch value. |
| 902 | bool inline_smi_code = ShouldInlineSmiCase(Token::EQ_STRICT); |
| 903 | JumpPatchSite patch_site(masm_); |
| 904 | if (inline_smi_code) { |
| 905 | Label slow_case; |
| 906 | __ mov(ecx, edx); |
| 907 | __ or_(ecx, eax); |
| 908 | patch_site.EmitJumpIfNotSmi(ecx, &slow_case, Label::kNear); |
| 909 | |
| 910 | __ cmp(edx, eax); |
| 911 | __ j(not_equal, &next_test); |
| 912 | __ Drop(1); // Switch value is no longer needed. |
| 913 | __ jmp(clause->body_target()); |
| 914 | __ bind(&slow_case); |
| 915 | } |
| 916 | |
| 917 | SetExpressionPosition(clause); |
| 918 | Handle<Code> ic = CodeFactory::CompareIC(isolate(), Token::EQ_STRICT, |
| 919 | strength(language_mode())).code(); |
| 920 | CallIC(ic, clause->CompareId()); |
| 921 | patch_site.EmitPatchInfo(); |
| 922 | |
| 923 | Label skip; |
| 924 | __ jmp(&skip, Label::kNear); |
| 925 | PrepareForBailout(clause, TOS_REG); |
| 926 | __ cmp(eax, isolate()->factory()->true_value()); |
| 927 | __ j(not_equal, &next_test); |
| 928 | __ Drop(1); |
| 929 | __ jmp(clause->body_target()); |
| 930 | __ bind(&skip); |
| 931 | |
| 932 | __ test(eax, eax); |
| 933 | __ j(not_equal, &next_test); |
| 934 | __ Drop(1); // Switch value is no longer needed. |
| 935 | __ jmp(clause->body_target()); |
| 936 | } |
| 937 | |
| 938 | // Discard the test value and jump to the default if present, otherwise to |
| 939 | // the end of the statement. |
| 940 | __ bind(&next_test); |
| 941 | __ Drop(1); // Switch value is no longer needed. |
| 942 | if (default_clause == NULL) { |
| 943 | __ jmp(nested_statement.break_label()); |
| 944 | } else { |
| 945 | __ jmp(default_clause->body_target()); |
| 946 | } |
| 947 | |
| 948 | // Compile all the case bodies. |
| 949 | for (int i = 0; i < clauses->length(); i++) { |
| 950 | Comment cmnt(masm_, "[ Case body"); |
| 951 | CaseClause* clause = clauses->at(i); |
| 952 | __ bind(clause->body_target()); |
| 953 | PrepareForBailoutForId(clause->EntryId(), NO_REGISTERS); |
| 954 | VisitStatements(clause->statements()); |
| 955 | } |
| 956 | |
| 957 | __ bind(nested_statement.break_label()); |
| 958 | PrepareForBailoutForId(stmt->ExitId(), NO_REGISTERS); |
| 959 | } |
| 960 | |
| 961 | |
| 962 | void FullCodeGenerator::VisitForInStatement(ForInStatement* stmt) { |
| 963 | Comment cmnt(masm_, "[ ForInStatement"); |
| 964 | SetStatementPosition(stmt, SKIP_BREAK); |
| 965 | |
| 966 | FeedbackVectorSlot slot = stmt->ForInFeedbackSlot(); |
| 967 | |
| 968 | Label loop, exit; |
| 969 | ForIn loop_statement(this, stmt); |
| 970 | increment_loop_depth(); |
| 971 | |
| 972 | // Get the object to enumerate over. If the object is null or undefined, skip |
| 973 | // over the loop. See ECMA-262 version 5, section 12.6.4. |
| 974 | SetExpressionAsStatementPosition(stmt->enumerable()); |
| 975 | VisitForAccumulatorValue(stmt->enumerable()); |
| 976 | __ cmp(eax, isolate()->factory()->undefined_value()); |
| 977 | __ j(equal, &exit); |
| 978 | __ cmp(eax, isolate()->factory()->null_value()); |
| 979 | __ j(equal, &exit); |
| 980 | |
| 981 | PrepareForBailoutForId(stmt->PrepareId(), TOS_REG); |
| 982 | |
| 983 | // Convert the object to a JS object. |
| 984 | Label convert, done_convert; |
| 985 | __ JumpIfSmi(eax, &convert, Label::kNear); |
| 986 | __ CmpObjectType(eax, FIRST_JS_RECEIVER_TYPE, ecx); |
| 987 | __ j(above_equal, &done_convert, Label::kNear); |
| 988 | __ bind(&convert); |
| 989 | ToObjectStub stub(isolate()); |
| 990 | __ CallStub(&stub); |
| 991 | __ bind(&done_convert); |
| 992 | PrepareForBailoutForId(stmt->ToObjectId(), TOS_REG); |
| 993 | __ push(eax); |
| 994 | |
| 995 | // Check for proxies. |
| 996 | Label call_runtime, use_cache, fixed_array; |
| 997 | __ CmpObjectType(eax, JS_PROXY_TYPE, ecx); |
| 998 | __ j(equal, &call_runtime); |
| 999 | |
| 1000 | // Check cache validity in generated code. This is a fast case for |
| 1001 | // the JSObject::IsSimpleEnum cache validity checks. If we cannot |
| 1002 | // guarantee cache validity, call the runtime system to check cache |
| 1003 | // validity or get the property names in a fixed array. |
| 1004 | __ CheckEnumCache(&call_runtime); |
| 1005 | |
| 1006 | __ mov(eax, FieldOperand(eax, HeapObject::kMapOffset)); |
| 1007 | __ jmp(&use_cache, Label::kNear); |
| 1008 | |
| 1009 | // Get the set of properties to enumerate. |
| 1010 | __ bind(&call_runtime); |
| 1011 | __ push(eax); |
| 1012 | __ CallRuntime(Runtime::kGetPropertyNamesFast); |
| 1013 | PrepareForBailoutForId(stmt->EnumId(), TOS_REG); |
| 1014 | __ cmp(FieldOperand(eax, HeapObject::kMapOffset), |
| 1015 | isolate()->factory()->meta_map()); |
| 1016 | __ j(not_equal, &fixed_array); |
| 1017 | |
| 1018 | |
| 1019 | // We got a map in register eax. Get the enumeration cache from it. |
| 1020 | Label no_descriptors; |
| 1021 | __ bind(&use_cache); |
| 1022 | |
| 1023 | __ EnumLength(edx, eax); |
| 1024 | __ cmp(edx, Immediate(Smi::FromInt(0))); |
| 1025 | __ j(equal, &no_descriptors); |
| 1026 | |
| 1027 | __ LoadInstanceDescriptors(eax, ecx); |
| 1028 | __ mov(ecx, FieldOperand(ecx, DescriptorArray::kEnumCacheOffset)); |
| 1029 | __ mov(ecx, FieldOperand(ecx, DescriptorArray::kEnumCacheBridgeCacheOffset)); |
| 1030 | |
| 1031 | // Set up the four remaining stack slots. |
| 1032 | __ push(eax); // Map. |
| 1033 | __ push(ecx); // Enumeration cache. |
| 1034 | __ push(edx); // Number of valid entries for the map in the enum cache. |
| 1035 | __ push(Immediate(Smi::FromInt(0))); // Initial index. |
| 1036 | __ jmp(&loop); |
| 1037 | |
| 1038 | __ bind(&no_descriptors); |
| 1039 | __ add(esp, Immediate(kPointerSize)); |
| 1040 | __ jmp(&exit); |
| 1041 | |
| 1042 | // We got a fixed array in register eax. Iterate through that. |
| 1043 | __ bind(&fixed_array); |
| 1044 | |
| 1045 | // No need for a write barrier, we are storing a Smi in the feedback vector. |
| 1046 | __ EmitLoadTypeFeedbackVector(ebx); |
| 1047 | int vector_index = SmiFromSlot(slot)->value(); |
| 1048 | __ mov(FieldOperand(ebx, FixedArray::OffsetOfElementAt(vector_index)), |
| 1049 | Immediate(TypeFeedbackVector::MegamorphicSentinel(isolate()))); |
| 1050 | __ push(Immediate(Smi::FromInt(1))); // Smi(1) undicates slow check |
| 1051 | __ push(eax); // Array |
| 1052 | __ mov(eax, FieldOperand(eax, FixedArray::kLengthOffset)); |
| 1053 | __ push(eax); // Fixed array length (as smi). |
| 1054 | __ push(Immediate(Smi::FromInt(0))); // Initial index. |
| 1055 | |
| 1056 | // Generate code for doing the condition check. |
| 1057 | __ bind(&loop); |
| 1058 | SetExpressionAsStatementPosition(stmt->each()); |
| 1059 | |
| 1060 | __ mov(eax, Operand(esp, 0 * kPointerSize)); // Get the current index. |
| 1061 | __ cmp(eax, Operand(esp, 1 * kPointerSize)); // Compare to the array length. |
| 1062 | __ j(above_equal, loop_statement.break_label()); |
| 1063 | |
| 1064 | // Get the current entry of the array into register ebx. |
| 1065 | __ mov(ebx, Operand(esp, 2 * kPointerSize)); |
| 1066 | __ mov(ebx, FieldOperand(ebx, eax, times_2, FixedArray::kHeaderSize)); |
| 1067 | |
| 1068 | // Get the expected map from the stack or a smi in the |
| 1069 | // permanent slow case into register edx. |
| 1070 | __ mov(edx, Operand(esp, 3 * kPointerSize)); |
| 1071 | |
| 1072 | // Check if the expected map still matches that of the enumerable. |
| 1073 | // If not, we may have to filter the key. |
| 1074 | Label update_each; |
| 1075 | __ mov(ecx, Operand(esp, 4 * kPointerSize)); |
| 1076 | __ cmp(edx, FieldOperand(ecx, HeapObject::kMapOffset)); |
| 1077 | __ j(equal, &update_each, Label::kNear); |
| 1078 | |
| 1079 | // Convert the entry to a string or null if it isn't a property |
| 1080 | // anymore. If the property has been removed while iterating, we |
| 1081 | // just skip it. |
| 1082 | __ push(ecx); // Enumerable. |
| 1083 | __ push(ebx); // Current entry. |
| 1084 | __ CallRuntime(Runtime::kForInFilter); |
| 1085 | PrepareForBailoutForId(stmt->FilterId(), TOS_REG); |
| 1086 | __ cmp(eax, isolate()->factory()->undefined_value()); |
| 1087 | __ j(equal, loop_statement.continue_label()); |
| 1088 | __ mov(ebx, eax); |
| 1089 | |
| 1090 | // Update the 'each' property or variable from the possibly filtered |
| 1091 | // entry in register ebx. |
| 1092 | __ bind(&update_each); |
| 1093 | __ mov(result_register(), ebx); |
| 1094 | // Perform the assignment as if via '='. |
| 1095 | { EffectContext context(this); |
| 1096 | EmitAssignment(stmt->each(), stmt->EachFeedbackSlot()); |
| 1097 | PrepareForBailoutForId(stmt->AssignmentId(), NO_REGISTERS); |
| 1098 | } |
| 1099 | |
| 1100 | // Both Crankshaft and Turbofan expect BodyId to be right before stmt->body(). |
| 1101 | PrepareForBailoutForId(stmt->BodyId(), NO_REGISTERS); |
| 1102 | // Generate code for the body of the loop. |
| 1103 | Visit(stmt->body()); |
| 1104 | |
| 1105 | // Generate code for going to the next element by incrementing the |
| 1106 | // index (smi) stored on top of the stack. |
| 1107 | __ bind(loop_statement.continue_label()); |
| 1108 | __ add(Operand(esp, 0 * kPointerSize), Immediate(Smi::FromInt(1))); |
| 1109 | |
| 1110 | EmitBackEdgeBookkeeping(stmt, &loop); |
| 1111 | __ jmp(&loop); |
| 1112 | |
| 1113 | // Remove the pointers stored on the stack. |
| 1114 | __ bind(loop_statement.break_label()); |
| 1115 | __ add(esp, Immediate(5 * kPointerSize)); |
| 1116 | |
| 1117 | // Exit and decrement the loop depth. |
| 1118 | PrepareForBailoutForId(stmt->ExitId(), NO_REGISTERS); |
| 1119 | __ bind(&exit); |
| 1120 | decrement_loop_depth(); |
| 1121 | } |
| 1122 | |
| 1123 | |
| 1124 | void FullCodeGenerator::EmitNewClosure(Handle<SharedFunctionInfo> info, |
| 1125 | bool pretenure) { |
| 1126 | // Use the fast case closure allocation code that allocates in new |
| 1127 | // space for nested functions that don't need literals cloning. If |
| 1128 | // we're running with the --always-opt or the --prepare-always-opt |
| 1129 | // flag, we need to use the runtime function so that the new function |
| 1130 | // we are creating here gets a chance to have its code optimized and |
| 1131 | // doesn't just get a copy of the existing unoptimized code. |
| 1132 | if (!FLAG_always_opt && |
| 1133 | !FLAG_prepare_always_opt && |
| 1134 | !pretenure && |
| 1135 | scope()->is_function_scope() && |
| 1136 | info->num_literals() == 0) { |
| 1137 | FastNewClosureStub stub(isolate(), info->language_mode(), info->kind()); |
| 1138 | __ mov(ebx, Immediate(info)); |
| 1139 | __ CallStub(&stub); |
| 1140 | } else { |
| 1141 | __ push(Immediate(info)); |
| 1142 | __ CallRuntime(pretenure ? Runtime::kNewClosure_Tenured |
| 1143 | : Runtime::kNewClosure); |
| 1144 | } |
| 1145 | context()->Plug(eax); |
| 1146 | } |
| 1147 | |
| 1148 | |
| 1149 | void FullCodeGenerator::EmitSetHomeObject(Expression* initializer, int offset, |
| 1150 | FeedbackVectorSlot slot) { |
| 1151 | DCHECK(NeedsHomeObject(initializer)); |
| 1152 | __ mov(StoreDescriptor::ReceiverRegister(), Operand(esp, 0)); |
| 1153 | __ mov(StoreDescriptor::NameRegister(), |
| 1154 | Immediate(isolate()->factory()->home_object_symbol())); |
| 1155 | __ mov(StoreDescriptor::ValueRegister(), Operand(esp, offset * kPointerSize)); |
| 1156 | EmitLoadStoreICSlot(slot); |
| 1157 | CallStoreIC(); |
| 1158 | } |
| 1159 | |
| 1160 | |
| 1161 | void FullCodeGenerator::EmitSetHomeObjectAccumulator(Expression* initializer, |
| 1162 | int offset, |
| 1163 | FeedbackVectorSlot slot) { |
| 1164 | DCHECK(NeedsHomeObject(initializer)); |
| 1165 | __ mov(StoreDescriptor::ReceiverRegister(), eax); |
| 1166 | __ mov(StoreDescriptor::NameRegister(), |
| 1167 | Immediate(isolate()->factory()->home_object_symbol())); |
| 1168 | __ mov(StoreDescriptor::ValueRegister(), Operand(esp, offset * kPointerSize)); |
| 1169 | EmitLoadStoreICSlot(slot); |
| 1170 | CallStoreIC(); |
| 1171 | } |
| 1172 | |
| 1173 | |
| 1174 | void FullCodeGenerator::EmitLoadGlobalCheckExtensions(VariableProxy* proxy, |
| 1175 | TypeofMode typeof_mode, |
| 1176 | Label* slow) { |
| 1177 | Register context = esi; |
| 1178 | Register temp = edx; |
| 1179 | |
| 1180 | Scope* s = scope(); |
| 1181 | while (s != NULL) { |
| 1182 | if (s->num_heap_slots() > 0) { |
| 1183 | if (s->calls_sloppy_eval()) { |
| 1184 | // Check that extension is "the hole". |
| 1185 | __ JumpIfNotRoot(ContextOperand(context, Context::EXTENSION_INDEX), |
| 1186 | Heap::kTheHoleValueRootIndex, slow); |
| 1187 | } |
| 1188 | // Load next context in chain. |
| 1189 | __ mov(temp, ContextOperand(context, Context::PREVIOUS_INDEX)); |
| 1190 | // Walk the rest of the chain without clobbering esi. |
| 1191 | context = temp; |
| 1192 | } |
| 1193 | // If no outer scope calls eval, we do not need to check more |
| 1194 | // context extensions. If we have reached an eval scope, we check |
| 1195 | // all extensions from this point. |
| 1196 | if (!s->outer_scope_calls_sloppy_eval() || s->is_eval_scope()) break; |
| 1197 | s = s->outer_scope(); |
| 1198 | } |
| 1199 | |
| 1200 | if (s != NULL && s->is_eval_scope()) { |
| 1201 | // Loop up the context chain. There is no frame effect so it is |
| 1202 | // safe to use raw labels here. |
| 1203 | Label next, fast; |
| 1204 | if (!context.is(temp)) { |
| 1205 | __ mov(temp, context); |
| 1206 | } |
| 1207 | __ bind(&next); |
| 1208 | // Terminate at native context. |
| 1209 | __ cmp(FieldOperand(temp, HeapObject::kMapOffset), |
| 1210 | Immediate(isolate()->factory()->native_context_map())); |
| 1211 | __ j(equal, &fast, Label::kNear); |
| 1212 | // Check that extension is "the hole". |
| 1213 | __ JumpIfNotRoot(ContextOperand(temp, Context::EXTENSION_INDEX), |
| 1214 | Heap::kTheHoleValueRootIndex, slow); |
| 1215 | // Load next context in chain. |
| 1216 | __ mov(temp, ContextOperand(temp, Context::PREVIOUS_INDEX)); |
| 1217 | __ jmp(&next); |
| 1218 | __ bind(&fast); |
| 1219 | } |
| 1220 | |
| 1221 | // All extension objects were empty and it is safe to use a normal global |
| 1222 | // load machinery. |
| 1223 | EmitGlobalVariableLoad(proxy, typeof_mode); |
| 1224 | } |
| 1225 | |
| 1226 | |
| 1227 | MemOperand FullCodeGenerator::ContextSlotOperandCheckExtensions(Variable* var, |
| 1228 | Label* slow) { |
| 1229 | DCHECK(var->IsContextSlot()); |
| 1230 | Register context = esi; |
| 1231 | Register temp = ebx; |
| 1232 | |
| 1233 | for (Scope* s = scope(); s != var->scope(); s = s->outer_scope()) { |
| 1234 | if (s->num_heap_slots() > 0) { |
| 1235 | if (s->calls_sloppy_eval()) { |
| 1236 | // Check that extension is "the hole". |
| 1237 | __ JumpIfNotRoot(ContextOperand(context, Context::EXTENSION_INDEX), |
| 1238 | Heap::kTheHoleValueRootIndex, slow); |
| 1239 | } |
| 1240 | __ mov(temp, ContextOperand(context, Context::PREVIOUS_INDEX)); |
| 1241 | // Walk the rest of the chain without clobbering esi. |
| 1242 | context = temp; |
| 1243 | } |
| 1244 | } |
| 1245 | // Check that last extension is "the hole". |
| 1246 | __ JumpIfNotRoot(ContextOperand(context, Context::EXTENSION_INDEX), |
| 1247 | Heap::kTheHoleValueRootIndex, slow); |
| 1248 | |
| 1249 | // This function is used only for loads, not stores, so it's safe to |
| 1250 | // return an esi-based operand (the write barrier cannot be allowed to |
| 1251 | // destroy the esi register). |
| 1252 | return ContextOperand(context, var->index()); |
| 1253 | } |
| 1254 | |
| 1255 | |
| 1256 | void FullCodeGenerator::EmitDynamicLookupFastCase(VariableProxy* proxy, |
| 1257 | TypeofMode typeof_mode, |
| 1258 | Label* slow, Label* done) { |
| 1259 | // Generate fast-case code for variables that might be shadowed by |
| 1260 | // eval-introduced variables. Eval is used a lot without |
| 1261 | // introducing variables. In those cases, we do not want to |
| 1262 | // perform a runtime call for all variables in the scope |
| 1263 | // containing the eval. |
| 1264 | Variable* var = proxy->var(); |
| 1265 | if (var->mode() == DYNAMIC_GLOBAL) { |
| 1266 | EmitLoadGlobalCheckExtensions(proxy, typeof_mode, slow); |
| 1267 | __ jmp(done); |
| 1268 | } else if (var->mode() == DYNAMIC_LOCAL) { |
| 1269 | Variable* local = var->local_if_not_shadowed(); |
| 1270 | __ mov(eax, ContextSlotOperandCheckExtensions(local, slow)); |
| 1271 | if (local->mode() == LET || local->mode() == CONST || |
| 1272 | local->mode() == CONST_LEGACY) { |
| 1273 | __ cmp(eax, isolate()->factory()->the_hole_value()); |
| 1274 | __ j(not_equal, done); |
| 1275 | if (local->mode() == CONST_LEGACY) { |
| 1276 | __ mov(eax, isolate()->factory()->undefined_value()); |
| 1277 | } else { // LET || CONST |
| 1278 | __ push(Immediate(var->name())); |
| 1279 | __ CallRuntime(Runtime::kThrowReferenceError); |
| 1280 | } |
| 1281 | } |
| 1282 | __ jmp(done); |
| 1283 | } |
| 1284 | } |
| 1285 | |
| 1286 | |
| 1287 | void FullCodeGenerator::EmitGlobalVariableLoad(VariableProxy* proxy, |
| 1288 | TypeofMode typeof_mode) { |
| 1289 | Variable* var = proxy->var(); |
| 1290 | DCHECK(var->IsUnallocatedOrGlobalSlot() || |
| 1291 | (var->IsLookupSlot() && var->mode() == DYNAMIC_GLOBAL)); |
| 1292 | __ mov(LoadDescriptor::ReceiverRegister(), NativeContextOperand()); |
| 1293 | __ mov(LoadDescriptor::ReceiverRegister(), |
| 1294 | ContextOperand(LoadDescriptor::ReceiverRegister(), |
| 1295 | Context::EXTENSION_INDEX)); |
| 1296 | __ mov(LoadDescriptor::NameRegister(), var->name()); |
| 1297 | __ mov(LoadDescriptor::SlotRegister(), |
| 1298 | Immediate(SmiFromSlot(proxy->VariableFeedbackSlot()))); |
| 1299 | CallLoadIC(typeof_mode); |
| 1300 | } |
| 1301 | |
| 1302 | |
| 1303 | void FullCodeGenerator::EmitVariableLoad(VariableProxy* proxy, |
| 1304 | TypeofMode typeof_mode) { |
| 1305 | SetExpressionPosition(proxy); |
| 1306 | PrepareForBailoutForId(proxy->BeforeId(), NO_REGISTERS); |
| 1307 | Variable* var = proxy->var(); |
| 1308 | |
| 1309 | // Three cases: global variables, lookup variables, and all other types of |
| 1310 | // variables. |
| 1311 | switch (var->location()) { |
| 1312 | case VariableLocation::GLOBAL: |
| 1313 | case VariableLocation::UNALLOCATED: { |
| 1314 | Comment cmnt(masm_, "[ Global variable"); |
| 1315 | EmitGlobalVariableLoad(proxy, typeof_mode); |
| 1316 | context()->Plug(eax); |
| 1317 | break; |
| 1318 | } |
| 1319 | |
| 1320 | case VariableLocation::PARAMETER: |
| 1321 | case VariableLocation::LOCAL: |
| 1322 | case VariableLocation::CONTEXT: { |
| 1323 | DCHECK_EQ(NOT_INSIDE_TYPEOF, typeof_mode); |
| 1324 | Comment cmnt(masm_, var->IsContextSlot() ? "[ Context variable" |
| 1325 | : "[ Stack variable"); |
| 1326 | |
| 1327 | if (NeedsHoleCheckForLoad(proxy)) { |
| 1328 | // Let and const need a read barrier. |
| 1329 | Label done; |
| 1330 | GetVar(eax, var); |
| 1331 | __ cmp(eax, isolate()->factory()->the_hole_value()); |
| 1332 | __ j(not_equal, &done, Label::kNear); |
| 1333 | if (var->mode() == LET || var->mode() == CONST) { |
| 1334 | // Throw a reference error when using an uninitialized let/const |
| 1335 | // binding in harmony mode. |
| 1336 | __ push(Immediate(var->name())); |
| 1337 | __ CallRuntime(Runtime::kThrowReferenceError); |
| 1338 | } else { |
| 1339 | // Uninitialized legacy const bindings are unholed. |
| 1340 | DCHECK(var->mode() == CONST_LEGACY); |
| 1341 | __ mov(eax, isolate()->factory()->undefined_value()); |
| 1342 | } |
| 1343 | __ bind(&done); |
| 1344 | context()->Plug(eax); |
| 1345 | break; |
| 1346 | } |
| 1347 | context()->Plug(var); |
| 1348 | break; |
| 1349 | } |
| 1350 | |
| 1351 | case VariableLocation::LOOKUP: { |
| 1352 | Comment cmnt(masm_, "[ Lookup variable"); |
| 1353 | Label done, slow; |
| 1354 | // Generate code for loading from variables potentially shadowed |
| 1355 | // by eval-introduced variables. |
| 1356 | EmitDynamicLookupFastCase(proxy, typeof_mode, &slow, &done); |
| 1357 | __ bind(&slow); |
| 1358 | __ push(esi); // Context. |
| 1359 | __ push(Immediate(var->name())); |
| 1360 | Runtime::FunctionId function_id = |
| 1361 | typeof_mode == NOT_INSIDE_TYPEOF |
| 1362 | ? Runtime::kLoadLookupSlot |
| 1363 | : Runtime::kLoadLookupSlotNoReferenceError; |
| 1364 | __ CallRuntime(function_id); |
| 1365 | __ bind(&done); |
| 1366 | context()->Plug(eax); |
| 1367 | break; |
| 1368 | } |
| 1369 | } |
| 1370 | } |
| 1371 | |
| 1372 | |
| 1373 | void FullCodeGenerator::VisitRegExpLiteral(RegExpLiteral* expr) { |
| 1374 | Comment cmnt(masm_, "[ RegExpLiteral"); |
| 1375 | __ mov(edi, Operand(ebp, JavaScriptFrameConstants::kFunctionOffset)); |
| 1376 | __ Move(eax, Immediate(Smi::FromInt(expr->literal_index()))); |
| 1377 | __ Move(ecx, Immediate(expr->pattern())); |
| 1378 | __ Move(edx, Immediate(Smi::FromInt(expr->flags()))); |
| 1379 | FastCloneRegExpStub stub(isolate()); |
| 1380 | __ CallStub(&stub); |
| 1381 | context()->Plug(eax); |
| 1382 | } |
| 1383 | |
| 1384 | |
| 1385 | void FullCodeGenerator::EmitAccessor(ObjectLiteralProperty* property) { |
| 1386 | Expression* expression = (property == NULL) ? NULL : property->value(); |
| 1387 | if (expression == NULL) { |
| 1388 | __ push(Immediate(isolate()->factory()->null_value())); |
| 1389 | } else { |
| 1390 | VisitForStackValue(expression); |
| 1391 | if (NeedsHomeObject(expression)) { |
| 1392 | DCHECK(property->kind() == ObjectLiteral::Property::GETTER || |
| 1393 | property->kind() == ObjectLiteral::Property::SETTER); |
| 1394 | int offset = property->kind() == ObjectLiteral::Property::GETTER ? 2 : 3; |
| 1395 | EmitSetHomeObject(expression, offset, property->GetSlot()); |
| 1396 | } |
| 1397 | } |
| 1398 | } |
| 1399 | |
| 1400 | |
| 1401 | void FullCodeGenerator::VisitObjectLiteral(ObjectLiteral* expr) { |
| 1402 | Comment cmnt(masm_, "[ ObjectLiteral"); |
| 1403 | |
| 1404 | Handle<FixedArray> constant_properties = expr->constant_properties(); |
| 1405 | int flags = expr->ComputeFlags(); |
| 1406 | // If any of the keys would store to the elements array, then we shouldn't |
| 1407 | // allow it. |
| 1408 | if (MustCreateObjectLiteralWithRuntime(expr)) { |
| 1409 | __ push(Operand(ebp, JavaScriptFrameConstants::kFunctionOffset)); |
| 1410 | __ push(Immediate(Smi::FromInt(expr->literal_index()))); |
| 1411 | __ push(Immediate(constant_properties)); |
| 1412 | __ push(Immediate(Smi::FromInt(flags))); |
| 1413 | __ CallRuntime(Runtime::kCreateObjectLiteral); |
| 1414 | } else { |
| 1415 | __ mov(eax, Operand(ebp, JavaScriptFrameConstants::kFunctionOffset)); |
| 1416 | __ mov(ebx, Immediate(Smi::FromInt(expr->literal_index()))); |
| 1417 | __ mov(ecx, Immediate(constant_properties)); |
| 1418 | __ mov(edx, Immediate(Smi::FromInt(flags))); |
| 1419 | FastCloneShallowObjectStub stub(isolate(), expr->properties_count()); |
| 1420 | __ CallStub(&stub); |
| 1421 | } |
| 1422 | PrepareForBailoutForId(expr->CreateLiteralId(), TOS_REG); |
| 1423 | |
| 1424 | // If result_saved is true the result is on top of the stack. If |
| 1425 | // result_saved is false the result is in eax. |
| 1426 | bool result_saved = false; |
| 1427 | |
| 1428 | AccessorTable accessor_table(zone()); |
| 1429 | int property_index = 0; |
| 1430 | for (; property_index < expr->properties()->length(); property_index++) { |
| 1431 | ObjectLiteral::Property* property = expr->properties()->at(property_index); |
| 1432 | if (property->is_computed_name()) break; |
| 1433 | if (property->IsCompileTimeValue()) continue; |
| 1434 | |
| 1435 | Literal* key = property->key()->AsLiteral(); |
| 1436 | Expression* value = property->value(); |
| 1437 | if (!result_saved) { |
| 1438 | __ push(eax); // Save result on the stack |
| 1439 | result_saved = true; |
| 1440 | } |
| 1441 | switch (property->kind()) { |
| 1442 | case ObjectLiteral::Property::CONSTANT: |
| 1443 | UNREACHABLE(); |
| 1444 | case ObjectLiteral::Property::MATERIALIZED_LITERAL: |
| 1445 | DCHECK(!CompileTimeValue::IsCompileTimeValue(value)); |
| 1446 | // Fall through. |
| 1447 | case ObjectLiteral::Property::COMPUTED: |
| 1448 | // It is safe to use [[Put]] here because the boilerplate already |
| 1449 | // contains computed properties with an uninitialized value. |
| 1450 | if (key->value()->IsInternalizedString()) { |
| 1451 | if (property->emit_store()) { |
| 1452 | VisitForAccumulatorValue(value); |
| 1453 | DCHECK(StoreDescriptor::ValueRegister().is(eax)); |
| 1454 | __ mov(StoreDescriptor::NameRegister(), Immediate(key->value())); |
| 1455 | __ mov(StoreDescriptor::ReceiverRegister(), Operand(esp, 0)); |
| 1456 | EmitLoadStoreICSlot(property->GetSlot(0)); |
| 1457 | CallStoreIC(); |
| 1458 | PrepareForBailoutForId(key->id(), NO_REGISTERS); |
| 1459 | if (NeedsHomeObject(value)) { |
| 1460 | EmitSetHomeObjectAccumulator(value, 0, property->GetSlot(1)); |
| 1461 | } |
| 1462 | } else { |
| 1463 | VisitForEffect(value); |
| 1464 | } |
| 1465 | break; |
| 1466 | } |
| 1467 | __ push(Operand(esp, 0)); // Duplicate receiver. |
| 1468 | VisitForStackValue(key); |
| 1469 | VisitForStackValue(value); |
| 1470 | if (property->emit_store()) { |
| 1471 | if (NeedsHomeObject(value)) { |
| 1472 | EmitSetHomeObject(value, 2, property->GetSlot()); |
| 1473 | } |
| 1474 | __ push(Immediate(Smi::FromInt(SLOPPY))); // Language mode |
| 1475 | __ CallRuntime(Runtime::kSetProperty); |
| 1476 | } else { |
| 1477 | __ Drop(3); |
| 1478 | } |
| 1479 | break; |
| 1480 | case ObjectLiteral::Property::PROTOTYPE: |
| 1481 | __ push(Operand(esp, 0)); // Duplicate receiver. |
| 1482 | VisitForStackValue(value); |
| 1483 | DCHECK(property->emit_store()); |
| 1484 | __ CallRuntime(Runtime::kInternalSetPrototype); |
| 1485 | PrepareForBailoutForId(expr->GetIdForPropertySet(property_index), |
| 1486 | NO_REGISTERS); |
| 1487 | break; |
| 1488 | case ObjectLiteral::Property::GETTER: |
| 1489 | if (property->emit_store()) { |
| 1490 | accessor_table.lookup(key)->second->getter = property; |
| 1491 | } |
| 1492 | break; |
| 1493 | case ObjectLiteral::Property::SETTER: |
| 1494 | if (property->emit_store()) { |
| 1495 | accessor_table.lookup(key)->second->setter = property; |
| 1496 | } |
| 1497 | break; |
| 1498 | } |
| 1499 | } |
| 1500 | |
| 1501 | // Emit code to define accessors, using only a single call to the runtime for |
| 1502 | // each pair of corresponding getters and setters. |
| 1503 | for (AccessorTable::Iterator it = accessor_table.begin(); |
| 1504 | it != accessor_table.end(); |
| 1505 | ++it) { |
| 1506 | __ push(Operand(esp, 0)); // Duplicate receiver. |
| 1507 | VisitForStackValue(it->first); |
| 1508 | |
| 1509 | EmitAccessor(it->second->getter); |
| 1510 | EmitAccessor(it->second->setter); |
| 1511 | |
| 1512 | __ push(Immediate(Smi::FromInt(NONE))); |
| 1513 | __ CallRuntime(Runtime::kDefineAccessorPropertyUnchecked); |
| 1514 | } |
| 1515 | |
| 1516 | // Object literals have two parts. The "static" part on the left contains no |
| 1517 | // computed property names, and so we can compute its map ahead of time; see |
| 1518 | // runtime.cc::CreateObjectLiteralBoilerplate. The second "dynamic" part |
| 1519 | // starts with the first computed property name, and continues with all |
| 1520 | // properties to its right. All the code from above initializes the static |
| 1521 | // component of the object literal, and arranges for the map of the result to |
| 1522 | // reflect the static order in which the keys appear. For the dynamic |
| 1523 | // properties, we compile them into a series of "SetOwnProperty" runtime |
| 1524 | // calls. This will preserve insertion order. |
| 1525 | for (; property_index < expr->properties()->length(); property_index++) { |
| 1526 | ObjectLiteral::Property* property = expr->properties()->at(property_index); |
| 1527 | |
| 1528 | Expression* value = property->value(); |
| 1529 | if (!result_saved) { |
| 1530 | __ push(eax); // Save result on the stack |
| 1531 | result_saved = true; |
| 1532 | } |
| 1533 | |
| 1534 | __ push(Operand(esp, 0)); // Duplicate receiver. |
| 1535 | |
| 1536 | if (property->kind() == ObjectLiteral::Property::PROTOTYPE) { |
| 1537 | DCHECK(!property->is_computed_name()); |
| 1538 | VisitForStackValue(value); |
| 1539 | DCHECK(property->emit_store()); |
| 1540 | __ CallRuntime(Runtime::kInternalSetPrototype); |
| 1541 | PrepareForBailoutForId(expr->GetIdForPropertySet(property_index), |
| 1542 | NO_REGISTERS); |
| 1543 | } else { |
| 1544 | EmitPropertyKey(property, expr->GetIdForPropertyName(property_index)); |
| 1545 | VisitForStackValue(value); |
| 1546 | if (NeedsHomeObject(value)) { |
| 1547 | EmitSetHomeObject(value, 2, property->GetSlot()); |
| 1548 | } |
| 1549 | |
| 1550 | switch (property->kind()) { |
| 1551 | case ObjectLiteral::Property::CONSTANT: |
| 1552 | case ObjectLiteral::Property::MATERIALIZED_LITERAL: |
| 1553 | case ObjectLiteral::Property::COMPUTED: |
| 1554 | if (property->emit_store()) { |
| 1555 | __ push(Immediate(Smi::FromInt(NONE))); |
| 1556 | __ CallRuntime(Runtime::kDefineDataPropertyUnchecked); |
| 1557 | } else { |
| 1558 | __ Drop(3); |
| 1559 | } |
| 1560 | break; |
| 1561 | |
| 1562 | case ObjectLiteral::Property::PROTOTYPE: |
| 1563 | UNREACHABLE(); |
| 1564 | break; |
| 1565 | |
| 1566 | case ObjectLiteral::Property::GETTER: |
| 1567 | __ push(Immediate(Smi::FromInt(NONE))); |
| 1568 | __ CallRuntime(Runtime::kDefineGetterPropertyUnchecked); |
| 1569 | break; |
| 1570 | |
| 1571 | case ObjectLiteral::Property::SETTER: |
| 1572 | __ push(Immediate(Smi::FromInt(NONE))); |
| 1573 | __ CallRuntime(Runtime::kDefineSetterPropertyUnchecked); |
| 1574 | break; |
| 1575 | } |
| 1576 | } |
| 1577 | } |
| 1578 | |
| 1579 | if (expr->has_function()) { |
| 1580 | DCHECK(result_saved); |
| 1581 | __ push(Operand(esp, 0)); |
| 1582 | __ CallRuntime(Runtime::kToFastProperties); |
| 1583 | } |
| 1584 | |
| 1585 | if (result_saved) { |
| 1586 | context()->PlugTOS(); |
| 1587 | } else { |
| 1588 | context()->Plug(eax); |
| 1589 | } |
| 1590 | } |
| 1591 | |
| 1592 | |
| 1593 | void FullCodeGenerator::VisitArrayLiteral(ArrayLiteral* expr) { |
| 1594 | Comment cmnt(masm_, "[ ArrayLiteral"); |
| 1595 | |
| 1596 | Handle<FixedArray> constant_elements = expr->constant_elements(); |
| 1597 | bool has_constant_fast_elements = |
| 1598 | IsFastObjectElementsKind(expr->constant_elements_kind()); |
| 1599 | |
| 1600 | AllocationSiteMode allocation_site_mode = TRACK_ALLOCATION_SITE; |
| 1601 | if (has_constant_fast_elements && !FLAG_allocation_site_pretenuring) { |
| 1602 | // If the only customer of allocation sites is transitioning, then |
| 1603 | // we can turn it off if we don't have anywhere else to transition to. |
| 1604 | allocation_site_mode = DONT_TRACK_ALLOCATION_SITE; |
| 1605 | } |
| 1606 | |
| 1607 | if (MustCreateArrayLiteralWithRuntime(expr)) { |
| 1608 | __ push(Operand(ebp, JavaScriptFrameConstants::kFunctionOffset)); |
| 1609 | __ push(Immediate(Smi::FromInt(expr->literal_index()))); |
| 1610 | __ push(Immediate(constant_elements)); |
| 1611 | __ push(Immediate(Smi::FromInt(expr->ComputeFlags()))); |
| 1612 | __ CallRuntime(Runtime::kCreateArrayLiteral); |
| 1613 | } else { |
| 1614 | __ mov(eax, Operand(ebp, JavaScriptFrameConstants::kFunctionOffset)); |
| 1615 | __ mov(ebx, Immediate(Smi::FromInt(expr->literal_index()))); |
| 1616 | __ mov(ecx, Immediate(constant_elements)); |
| 1617 | FastCloneShallowArrayStub stub(isolate(), allocation_site_mode); |
| 1618 | __ CallStub(&stub); |
| 1619 | } |
| 1620 | PrepareForBailoutForId(expr->CreateLiteralId(), TOS_REG); |
| 1621 | |
| 1622 | bool result_saved = false; // Is the result saved to the stack? |
| 1623 | ZoneList<Expression*>* subexprs = expr->values(); |
| 1624 | int length = subexprs->length(); |
| 1625 | |
| 1626 | // Emit code to evaluate all the non-constant subexpressions and to store |
| 1627 | // them into the newly cloned array. |
| 1628 | int array_index = 0; |
| 1629 | for (; array_index < length; array_index++) { |
| 1630 | Expression* subexpr = subexprs->at(array_index); |
| 1631 | if (subexpr->IsSpread()) break; |
| 1632 | |
| 1633 | // If the subexpression is a literal or a simple materialized literal it |
| 1634 | // is already set in the cloned array. |
| 1635 | if (CompileTimeValue::IsCompileTimeValue(subexpr)) continue; |
| 1636 | |
| 1637 | if (!result_saved) { |
| 1638 | __ push(eax); // array literal. |
| 1639 | result_saved = true; |
| 1640 | } |
| 1641 | VisitForAccumulatorValue(subexpr); |
| 1642 | |
| 1643 | __ mov(StoreDescriptor::NameRegister(), |
| 1644 | Immediate(Smi::FromInt(array_index))); |
| 1645 | __ mov(StoreDescriptor::ReceiverRegister(), Operand(esp, 0)); |
| 1646 | EmitLoadStoreICSlot(expr->LiteralFeedbackSlot()); |
| 1647 | Handle<Code> ic = |
| 1648 | CodeFactory::KeyedStoreIC(isolate(), language_mode()).code(); |
| 1649 | CallIC(ic); |
| 1650 | PrepareForBailoutForId(expr->GetIdForElement(array_index), NO_REGISTERS); |
| 1651 | } |
| 1652 | |
| 1653 | // In case the array literal contains spread expressions it has two parts. The |
| 1654 | // first part is the "static" array which has a literal index is handled |
| 1655 | // above. The second part is the part after the first spread expression |
| 1656 | // (inclusive) and these elements gets appended to the array. Note that the |
| 1657 | // number elements an iterable produces is unknown ahead of time. |
| 1658 | if (array_index < length && result_saved) { |
| 1659 | __ Pop(eax); |
| 1660 | result_saved = false; |
| 1661 | } |
| 1662 | for (; array_index < length; array_index++) { |
| 1663 | Expression* subexpr = subexprs->at(array_index); |
| 1664 | |
| 1665 | __ Push(eax); |
| 1666 | if (subexpr->IsSpread()) { |
| 1667 | VisitForStackValue(subexpr->AsSpread()->expression()); |
| 1668 | __ InvokeBuiltin(Context::CONCAT_ITERABLE_TO_ARRAY_BUILTIN_INDEX, |
| 1669 | CALL_FUNCTION); |
| 1670 | } else { |
| 1671 | VisitForStackValue(subexpr); |
| 1672 | __ CallRuntime(Runtime::kAppendElement); |
| 1673 | } |
| 1674 | |
| 1675 | PrepareForBailoutForId(expr->GetIdForElement(array_index), NO_REGISTERS); |
| 1676 | } |
| 1677 | |
| 1678 | if (result_saved) { |
| 1679 | context()->PlugTOS(); |
| 1680 | } else { |
| 1681 | context()->Plug(eax); |
| 1682 | } |
| 1683 | } |
| 1684 | |
| 1685 | |
| 1686 | void FullCodeGenerator::VisitAssignment(Assignment* expr) { |
| 1687 | DCHECK(expr->target()->IsValidReferenceExpressionOrThis()); |
| 1688 | |
| 1689 | Comment cmnt(masm_, "[ Assignment"); |
| 1690 | SetExpressionPosition(expr, INSERT_BREAK); |
| 1691 | |
| 1692 | Property* property = expr->target()->AsProperty(); |
| 1693 | LhsKind assign_type = Property::GetAssignType(property); |
| 1694 | |
| 1695 | // Evaluate LHS expression. |
| 1696 | switch (assign_type) { |
| 1697 | case VARIABLE: |
| 1698 | // Nothing to do here. |
| 1699 | break; |
| 1700 | case NAMED_SUPER_PROPERTY: |
| 1701 | VisitForStackValue( |
| 1702 | property->obj()->AsSuperPropertyReference()->this_var()); |
| 1703 | VisitForAccumulatorValue( |
| 1704 | property->obj()->AsSuperPropertyReference()->home_object()); |
| 1705 | __ push(result_register()); |
| 1706 | if (expr->is_compound()) { |
| 1707 | __ push(MemOperand(esp, kPointerSize)); |
| 1708 | __ push(result_register()); |
| 1709 | } |
| 1710 | break; |
| 1711 | case NAMED_PROPERTY: |
| 1712 | if (expr->is_compound()) { |
| 1713 | // We need the receiver both on the stack and in the register. |
| 1714 | VisitForStackValue(property->obj()); |
| 1715 | __ mov(LoadDescriptor::ReceiverRegister(), Operand(esp, 0)); |
| 1716 | } else { |
| 1717 | VisitForStackValue(property->obj()); |
| 1718 | } |
| 1719 | break; |
| 1720 | case KEYED_SUPER_PROPERTY: |
| 1721 | VisitForStackValue( |
| 1722 | property->obj()->AsSuperPropertyReference()->this_var()); |
| 1723 | VisitForStackValue( |
| 1724 | property->obj()->AsSuperPropertyReference()->home_object()); |
| 1725 | VisitForAccumulatorValue(property->key()); |
| 1726 | __ Push(result_register()); |
| 1727 | if (expr->is_compound()) { |
| 1728 | __ push(MemOperand(esp, 2 * kPointerSize)); |
| 1729 | __ push(MemOperand(esp, 2 * kPointerSize)); |
| 1730 | __ push(result_register()); |
| 1731 | } |
| 1732 | break; |
| 1733 | case KEYED_PROPERTY: { |
| 1734 | if (expr->is_compound()) { |
| 1735 | VisitForStackValue(property->obj()); |
| 1736 | VisitForStackValue(property->key()); |
| 1737 | __ mov(LoadDescriptor::ReceiverRegister(), Operand(esp, kPointerSize)); |
| 1738 | __ mov(LoadDescriptor::NameRegister(), Operand(esp, 0)); |
| 1739 | } else { |
| 1740 | VisitForStackValue(property->obj()); |
| 1741 | VisitForStackValue(property->key()); |
| 1742 | } |
| 1743 | break; |
| 1744 | } |
| 1745 | } |
| 1746 | |
| 1747 | // For compound assignments we need another deoptimization point after the |
| 1748 | // variable/property load. |
| 1749 | if (expr->is_compound()) { |
| 1750 | AccumulatorValueContext result_context(this); |
| 1751 | { AccumulatorValueContext left_operand_context(this); |
| 1752 | switch (assign_type) { |
| 1753 | case VARIABLE: |
| 1754 | EmitVariableLoad(expr->target()->AsVariableProxy()); |
| 1755 | PrepareForBailout(expr->target(), TOS_REG); |
| 1756 | break; |
| 1757 | case NAMED_SUPER_PROPERTY: |
| 1758 | EmitNamedSuperPropertyLoad(property); |
| 1759 | PrepareForBailoutForId(property->LoadId(), TOS_REG); |
| 1760 | break; |
| 1761 | case NAMED_PROPERTY: |
| 1762 | EmitNamedPropertyLoad(property); |
| 1763 | PrepareForBailoutForId(property->LoadId(), TOS_REG); |
| 1764 | break; |
| 1765 | case KEYED_SUPER_PROPERTY: |
| 1766 | EmitKeyedSuperPropertyLoad(property); |
| 1767 | PrepareForBailoutForId(property->LoadId(), TOS_REG); |
| 1768 | break; |
| 1769 | case KEYED_PROPERTY: |
| 1770 | EmitKeyedPropertyLoad(property); |
| 1771 | PrepareForBailoutForId(property->LoadId(), TOS_REG); |
| 1772 | break; |
| 1773 | } |
| 1774 | } |
| 1775 | |
| 1776 | Token::Value op = expr->binary_op(); |
| 1777 | __ push(eax); // Left operand goes on the stack. |
| 1778 | VisitForAccumulatorValue(expr->value()); |
| 1779 | |
| 1780 | if (ShouldInlineSmiCase(op)) { |
| 1781 | EmitInlineSmiBinaryOp(expr->binary_operation(), |
| 1782 | op, |
| 1783 | expr->target(), |
| 1784 | expr->value()); |
| 1785 | } else { |
| 1786 | EmitBinaryOp(expr->binary_operation(), op); |
| 1787 | } |
| 1788 | |
| 1789 | // Deoptimization point in case the binary operation may have side effects. |
| 1790 | PrepareForBailout(expr->binary_operation(), TOS_REG); |
| 1791 | } else { |
| 1792 | VisitForAccumulatorValue(expr->value()); |
| 1793 | } |
| 1794 | |
| 1795 | SetExpressionPosition(expr); |
| 1796 | |
| 1797 | // Store the value. |
| 1798 | switch (assign_type) { |
| 1799 | case VARIABLE: |
| 1800 | EmitVariableAssignment(expr->target()->AsVariableProxy()->var(), |
| 1801 | expr->op(), expr->AssignmentSlot()); |
| 1802 | PrepareForBailoutForId(expr->AssignmentId(), TOS_REG); |
| 1803 | context()->Plug(eax); |
| 1804 | break; |
| 1805 | case NAMED_PROPERTY: |
| 1806 | EmitNamedPropertyAssignment(expr); |
| 1807 | break; |
| 1808 | case NAMED_SUPER_PROPERTY: |
| 1809 | EmitNamedSuperPropertyStore(property); |
| 1810 | context()->Plug(result_register()); |
| 1811 | break; |
| 1812 | case KEYED_SUPER_PROPERTY: |
| 1813 | EmitKeyedSuperPropertyStore(property); |
| 1814 | context()->Plug(result_register()); |
| 1815 | break; |
| 1816 | case KEYED_PROPERTY: |
| 1817 | EmitKeyedPropertyAssignment(expr); |
| 1818 | break; |
| 1819 | } |
| 1820 | } |
| 1821 | |
| 1822 | |
| 1823 | void FullCodeGenerator::VisitYield(Yield* expr) { |
| 1824 | Comment cmnt(masm_, "[ Yield"); |
| 1825 | SetExpressionPosition(expr); |
| 1826 | |
| 1827 | // Evaluate yielded value first; the initial iterator definition depends on |
| 1828 | // this. It stays on the stack while we update the iterator. |
| 1829 | VisitForStackValue(expr->expression()); |
| 1830 | |
| 1831 | switch (expr->yield_kind()) { |
| 1832 | case Yield::kSuspend: |
| 1833 | // Pop value from top-of-stack slot; box result into result register. |
| 1834 | EmitCreateIteratorResult(false); |
| 1835 | __ push(result_register()); |
| 1836 | // Fall through. |
| 1837 | case Yield::kInitial: { |
| 1838 | Label suspend, continuation, post_runtime, resume; |
| 1839 | |
| 1840 | __ jmp(&suspend); |
| 1841 | __ bind(&continuation); |
| 1842 | __ RecordGeneratorContinuation(); |
| 1843 | __ jmp(&resume); |
| 1844 | |
| 1845 | __ bind(&suspend); |
| 1846 | VisitForAccumulatorValue(expr->generator_object()); |
| 1847 | DCHECK(continuation.pos() > 0 && Smi::IsValid(continuation.pos())); |
| 1848 | __ mov(FieldOperand(eax, JSGeneratorObject::kContinuationOffset), |
| 1849 | Immediate(Smi::FromInt(continuation.pos()))); |
| 1850 | __ mov(FieldOperand(eax, JSGeneratorObject::kContextOffset), esi); |
| 1851 | __ mov(ecx, esi); |
| 1852 | __ RecordWriteField(eax, JSGeneratorObject::kContextOffset, ecx, edx, |
| 1853 | kDontSaveFPRegs); |
| 1854 | __ lea(ebx, Operand(ebp, StandardFrameConstants::kExpressionsOffset)); |
| 1855 | __ cmp(esp, ebx); |
| 1856 | __ j(equal, &post_runtime); |
| 1857 | __ push(eax); // generator object |
| 1858 | __ CallRuntime(Runtime::kSuspendJSGeneratorObject, 1); |
| 1859 | __ mov(context_register(), |
| 1860 | Operand(ebp, StandardFrameConstants::kContextOffset)); |
| 1861 | __ bind(&post_runtime); |
| 1862 | __ pop(result_register()); |
| 1863 | EmitReturnSequence(); |
| 1864 | |
| 1865 | __ bind(&resume); |
| 1866 | context()->Plug(result_register()); |
| 1867 | break; |
| 1868 | } |
| 1869 | |
| 1870 | case Yield::kFinal: { |
| 1871 | VisitForAccumulatorValue(expr->generator_object()); |
| 1872 | __ mov(FieldOperand(result_register(), |
| 1873 | JSGeneratorObject::kContinuationOffset), |
| 1874 | Immediate(Smi::FromInt(JSGeneratorObject::kGeneratorClosed))); |
| 1875 | // Pop value from top-of-stack slot, box result into result register. |
| 1876 | EmitCreateIteratorResult(true); |
| 1877 | EmitUnwindBeforeReturn(); |
| 1878 | EmitReturnSequence(); |
| 1879 | break; |
| 1880 | } |
| 1881 | |
| 1882 | case Yield::kDelegating: { |
| 1883 | VisitForStackValue(expr->generator_object()); |
| 1884 | |
| 1885 | // Initial stack layout is as follows: |
| 1886 | // [sp + 1 * kPointerSize] iter |
| 1887 | // [sp + 0 * kPointerSize] g |
| 1888 | |
| 1889 | Label l_catch, l_try, l_suspend, l_continuation, l_resume; |
| 1890 | Label l_next, l_call, l_loop; |
| 1891 | Register load_receiver = LoadDescriptor::ReceiverRegister(); |
| 1892 | Register load_name = LoadDescriptor::NameRegister(); |
| 1893 | |
| 1894 | // Initial send value is undefined. |
| 1895 | __ mov(eax, isolate()->factory()->undefined_value()); |
| 1896 | __ jmp(&l_next); |
| 1897 | |
| 1898 | // catch (e) { receiver = iter; f = 'throw'; arg = e; goto l_call; } |
| 1899 | __ bind(&l_catch); |
| 1900 | __ mov(load_name, isolate()->factory()->throw_string()); // "throw" |
| 1901 | __ push(load_name); // "throw" |
| 1902 | __ push(Operand(esp, 2 * kPointerSize)); // iter |
| 1903 | __ push(eax); // exception |
| 1904 | __ jmp(&l_call); |
| 1905 | |
| 1906 | // try { received = %yield result } |
| 1907 | // Shuffle the received result above a try handler and yield it without |
| 1908 | // re-boxing. |
| 1909 | __ bind(&l_try); |
| 1910 | __ pop(eax); // result |
| 1911 | int handler_index = NewHandlerTableEntry(); |
| 1912 | EnterTryBlock(handler_index, &l_catch); |
| 1913 | const int try_block_size = TryCatch::kElementCount * kPointerSize; |
| 1914 | __ push(eax); // result |
| 1915 | |
| 1916 | __ jmp(&l_suspend); |
| 1917 | __ bind(&l_continuation); |
| 1918 | __ RecordGeneratorContinuation(); |
| 1919 | __ jmp(&l_resume); |
| 1920 | |
| 1921 | __ bind(&l_suspend); |
| 1922 | const int generator_object_depth = kPointerSize + try_block_size; |
| 1923 | __ mov(eax, Operand(esp, generator_object_depth)); |
| 1924 | __ push(eax); // g |
| 1925 | __ push(Immediate(Smi::FromInt(handler_index))); // handler-index |
| 1926 | DCHECK(l_continuation.pos() > 0 && Smi::IsValid(l_continuation.pos())); |
| 1927 | __ mov(FieldOperand(eax, JSGeneratorObject::kContinuationOffset), |
| 1928 | Immediate(Smi::FromInt(l_continuation.pos()))); |
| 1929 | __ mov(FieldOperand(eax, JSGeneratorObject::kContextOffset), esi); |
| 1930 | __ mov(ecx, esi); |
| 1931 | __ RecordWriteField(eax, JSGeneratorObject::kContextOffset, ecx, edx, |
| 1932 | kDontSaveFPRegs); |
| 1933 | __ CallRuntime(Runtime::kSuspendJSGeneratorObject, 2); |
| 1934 | __ mov(context_register(), |
| 1935 | Operand(ebp, StandardFrameConstants::kContextOffset)); |
| 1936 | __ pop(eax); // result |
| 1937 | EmitReturnSequence(); |
| 1938 | __ bind(&l_resume); // received in eax |
| 1939 | ExitTryBlock(handler_index); |
| 1940 | |
| 1941 | // receiver = iter; f = iter.next; arg = received; |
| 1942 | __ bind(&l_next); |
| 1943 | |
| 1944 | __ mov(load_name, isolate()->factory()->next_string()); |
| 1945 | __ push(load_name); // "next" |
| 1946 | __ push(Operand(esp, 2 * kPointerSize)); // iter |
| 1947 | __ push(eax); // received |
| 1948 | |
| 1949 | // result = receiver[f](arg); |
| 1950 | __ bind(&l_call); |
| 1951 | __ mov(load_receiver, Operand(esp, kPointerSize)); |
| 1952 | __ mov(LoadDescriptor::SlotRegister(), |
| 1953 | Immediate(SmiFromSlot(expr->KeyedLoadFeedbackSlot()))); |
| 1954 | Handle<Code> ic = CodeFactory::KeyedLoadIC(isolate(), SLOPPY).code(); |
| 1955 | CallIC(ic, TypeFeedbackId::None()); |
| 1956 | __ mov(edi, eax); |
| 1957 | __ mov(Operand(esp, 2 * kPointerSize), edi); |
| 1958 | SetCallPosition(expr); |
| 1959 | __ Set(eax, 1); |
| 1960 | __ Call( |
| 1961 | isolate()->builtins()->Call(ConvertReceiverMode::kNotNullOrUndefined), |
| 1962 | RelocInfo::CODE_TARGET); |
| 1963 | |
| 1964 | __ mov(esi, Operand(ebp, StandardFrameConstants::kContextOffset)); |
| 1965 | __ Drop(1); // The function is still on the stack; drop it. |
| 1966 | |
| 1967 | // if (!result.done) goto l_try; |
| 1968 | __ bind(&l_loop); |
| 1969 | __ push(eax); // save result |
| 1970 | __ Move(load_receiver, eax); // result |
| 1971 | __ mov(load_name, |
| 1972 | isolate()->factory()->done_string()); // "done" |
| 1973 | __ mov(LoadDescriptor::SlotRegister(), |
| 1974 | Immediate(SmiFromSlot(expr->DoneFeedbackSlot()))); |
| 1975 | CallLoadIC(NOT_INSIDE_TYPEOF); // result.done in eax |
| 1976 | Handle<Code> bool_ic = ToBooleanStub::GetUninitialized(isolate()); |
| 1977 | CallIC(bool_ic); |
| 1978 | __ CompareRoot(result_register(), Heap::kTrueValueRootIndex); |
| 1979 | __ j(not_equal, &l_try); |
| 1980 | |
| 1981 | // result.value |
| 1982 | __ pop(load_receiver); // result |
| 1983 | __ mov(load_name, |
| 1984 | isolate()->factory()->value_string()); // "value" |
| 1985 | __ mov(LoadDescriptor::SlotRegister(), |
| 1986 | Immediate(SmiFromSlot(expr->ValueFeedbackSlot()))); |
| 1987 | CallLoadIC(NOT_INSIDE_TYPEOF); // result.value in eax |
| 1988 | context()->DropAndPlug(2, eax); // drop iter and g |
| 1989 | break; |
| 1990 | } |
| 1991 | } |
| 1992 | } |
| 1993 | |
| 1994 | |
| 1995 | void FullCodeGenerator::EmitGeneratorResume(Expression *generator, |
| 1996 | Expression *value, |
| 1997 | JSGeneratorObject::ResumeMode resume_mode) { |
| 1998 | // The value stays in eax, and is ultimately read by the resumed generator, as |
| 1999 | // if CallRuntime(Runtime::kSuspendJSGeneratorObject) returned it. Or it |
| 2000 | // is read to throw the value when the resumed generator is already closed. |
| 2001 | // ebx will hold the generator object until the activation has been resumed. |
| 2002 | VisitForStackValue(generator); |
| 2003 | VisitForAccumulatorValue(value); |
| 2004 | __ pop(ebx); |
| 2005 | |
| 2006 | // Load suspended function and context. |
| 2007 | __ mov(esi, FieldOperand(ebx, JSGeneratorObject::kContextOffset)); |
| 2008 | __ mov(edi, FieldOperand(ebx, JSGeneratorObject::kFunctionOffset)); |
| 2009 | |
| 2010 | // Push receiver. |
| 2011 | __ push(FieldOperand(ebx, JSGeneratorObject::kReceiverOffset)); |
| 2012 | |
| 2013 | // Push holes for arguments to generator function. |
| 2014 | __ mov(edx, FieldOperand(edi, JSFunction::kSharedFunctionInfoOffset)); |
| 2015 | __ mov(edx, |
| 2016 | FieldOperand(edx, SharedFunctionInfo::kFormalParameterCountOffset)); |
| 2017 | __ mov(ecx, isolate()->factory()->the_hole_value()); |
| 2018 | Label push_argument_holes, push_frame; |
| 2019 | __ bind(&push_argument_holes); |
| 2020 | __ sub(edx, Immediate(Smi::FromInt(1))); |
| 2021 | __ j(carry, &push_frame); |
| 2022 | __ push(ecx); |
| 2023 | __ jmp(&push_argument_holes); |
| 2024 | |
| 2025 | // Enter a new JavaScript frame, and initialize its slots as they were when |
| 2026 | // the generator was suspended. |
| 2027 | Label resume_frame, done; |
| 2028 | __ bind(&push_frame); |
| 2029 | __ call(&resume_frame); |
| 2030 | __ jmp(&done); |
| 2031 | __ bind(&resume_frame); |
| 2032 | __ push(ebp); // Caller's frame pointer. |
| 2033 | __ mov(ebp, esp); |
| 2034 | __ push(esi); // Callee's context. |
| 2035 | __ push(edi); // Callee's JS Function. |
| 2036 | |
| 2037 | // Load the operand stack size. |
| 2038 | __ mov(edx, FieldOperand(ebx, JSGeneratorObject::kOperandStackOffset)); |
| 2039 | __ mov(edx, FieldOperand(edx, FixedArray::kLengthOffset)); |
| 2040 | __ SmiUntag(edx); |
| 2041 | |
| 2042 | // If we are sending a value and there is no operand stack, we can jump back |
| 2043 | // in directly. |
| 2044 | if (resume_mode == JSGeneratorObject::NEXT) { |
| 2045 | Label slow_resume; |
| 2046 | __ cmp(edx, Immediate(0)); |
| 2047 | __ j(not_zero, &slow_resume); |
| 2048 | __ mov(edx, FieldOperand(edi, JSFunction::kCodeEntryOffset)); |
| 2049 | __ mov(ecx, FieldOperand(ebx, JSGeneratorObject::kContinuationOffset)); |
| 2050 | __ SmiUntag(ecx); |
| 2051 | __ add(edx, ecx); |
| 2052 | __ mov(FieldOperand(ebx, JSGeneratorObject::kContinuationOffset), |
| 2053 | Immediate(Smi::FromInt(JSGeneratorObject::kGeneratorExecuting))); |
| 2054 | __ jmp(edx); |
| 2055 | __ bind(&slow_resume); |
| 2056 | } |
| 2057 | |
| 2058 | // Otherwise, we push holes for the operand stack and call the runtime to fix |
| 2059 | // up the stack and the handlers. |
| 2060 | Label push_operand_holes, call_resume; |
| 2061 | __ bind(&push_operand_holes); |
| 2062 | __ sub(edx, Immediate(1)); |
| 2063 | __ j(carry, &call_resume); |
| 2064 | __ push(ecx); |
| 2065 | __ jmp(&push_operand_holes); |
| 2066 | __ bind(&call_resume); |
| 2067 | __ push(ebx); |
| 2068 | __ push(result_register()); |
| 2069 | __ Push(Smi::FromInt(resume_mode)); |
| 2070 | __ CallRuntime(Runtime::kResumeJSGeneratorObject); |
| 2071 | // Not reached: the runtime call returns elsewhere. |
| 2072 | __ Abort(kGeneratorFailedToResume); |
| 2073 | |
| 2074 | __ bind(&done); |
| 2075 | context()->Plug(result_register()); |
| 2076 | } |
| 2077 | |
| 2078 | |
| 2079 | void FullCodeGenerator::EmitCreateIteratorResult(bool done) { |
| 2080 | Label allocate, done_allocate; |
| 2081 | |
| 2082 | __ Allocate(JSIteratorResult::kSize, eax, ecx, edx, &allocate, TAG_OBJECT); |
| 2083 | __ jmp(&done_allocate, Label::kNear); |
| 2084 | |
| 2085 | __ bind(&allocate); |
| 2086 | __ Push(Smi::FromInt(JSIteratorResult::kSize)); |
| 2087 | __ CallRuntime(Runtime::kAllocateInNewSpace); |
| 2088 | |
| 2089 | __ bind(&done_allocate); |
| 2090 | __ mov(ebx, NativeContextOperand()); |
| 2091 | __ mov(ebx, ContextOperand(ebx, Context::ITERATOR_RESULT_MAP_INDEX)); |
| 2092 | __ mov(FieldOperand(eax, HeapObject::kMapOffset), ebx); |
| 2093 | __ mov(FieldOperand(eax, JSObject::kPropertiesOffset), |
| 2094 | isolate()->factory()->empty_fixed_array()); |
| 2095 | __ mov(FieldOperand(eax, JSObject::kElementsOffset), |
| 2096 | isolate()->factory()->empty_fixed_array()); |
| 2097 | __ pop(FieldOperand(eax, JSIteratorResult::kValueOffset)); |
| 2098 | __ mov(FieldOperand(eax, JSIteratorResult::kDoneOffset), |
| 2099 | isolate()->factory()->ToBoolean(done)); |
| 2100 | STATIC_ASSERT(JSIteratorResult::kSize == 5 * kPointerSize); |
| 2101 | } |
| 2102 | |
| 2103 | |
| 2104 | void FullCodeGenerator::EmitNamedPropertyLoad(Property* prop) { |
| 2105 | SetExpressionPosition(prop); |
| 2106 | Literal* key = prop->key()->AsLiteral(); |
| 2107 | DCHECK(!key->value()->IsSmi()); |
| 2108 | DCHECK(!prop->IsSuperAccess()); |
| 2109 | |
| 2110 | __ mov(LoadDescriptor::NameRegister(), Immediate(key->value())); |
| 2111 | __ mov(LoadDescriptor::SlotRegister(), |
| 2112 | Immediate(SmiFromSlot(prop->PropertyFeedbackSlot()))); |
| 2113 | CallLoadIC(NOT_INSIDE_TYPEOF, language_mode()); |
| 2114 | } |
| 2115 | |
| 2116 | |
| 2117 | void FullCodeGenerator::EmitNamedSuperPropertyLoad(Property* prop) { |
| 2118 | // Stack: receiver, home_object. |
| 2119 | SetExpressionPosition(prop); |
| 2120 | Literal* key = prop->key()->AsLiteral(); |
| 2121 | DCHECK(!key->value()->IsSmi()); |
| 2122 | DCHECK(prop->IsSuperAccess()); |
| 2123 | |
| 2124 | __ push(Immediate(key->value())); |
| 2125 | __ push(Immediate(Smi::FromInt(language_mode()))); |
| 2126 | __ CallRuntime(Runtime::kLoadFromSuper); |
| 2127 | } |
| 2128 | |
| 2129 | |
| 2130 | void FullCodeGenerator::EmitKeyedPropertyLoad(Property* prop) { |
| 2131 | SetExpressionPosition(prop); |
| 2132 | Handle<Code> ic = CodeFactory::KeyedLoadIC(isolate(), language_mode()).code(); |
| 2133 | __ mov(LoadDescriptor::SlotRegister(), |
| 2134 | Immediate(SmiFromSlot(prop->PropertyFeedbackSlot()))); |
| 2135 | CallIC(ic); |
| 2136 | } |
| 2137 | |
| 2138 | |
| 2139 | void FullCodeGenerator::EmitKeyedSuperPropertyLoad(Property* prop) { |
| 2140 | // Stack: receiver, home_object, key. |
| 2141 | SetExpressionPosition(prop); |
| 2142 | __ push(Immediate(Smi::FromInt(language_mode()))); |
| 2143 | __ CallRuntime(Runtime::kLoadKeyedFromSuper); |
| 2144 | } |
| 2145 | |
| 2146 | |
| 2147 | void FullCodeGenerator::EmitInlineSmiBinaryOp(BinaryOperation* expr, |
| 2148 | Token::Value op, |
| 2149 | Expression* left, |
| 2150 | Expression* right) { |
| 2151 | // Do combined smi check of the operands. Left operand is on the |
| 2152 | // stack. Right operand is in eax. |
| 2153 | Label smi_case, done, stub_call; |
| 2154 | __ pop(edx); |
| 2155 | __ mov(ecx, eax); |
| 2156 | __ or_(eax, edx); |
| 2157 | JumpPatchSite patch_site(masm_); |
| 2158 | patch_site.EmitJumpIfSmi(eax, &smi_case, Label::kNear); |
| 2159 | |
| 2160 | __ bind(&stub_call); |
| 2161 | __ mov(eax, ecx); |
| 2162 | Handle<Code> code = |
| 2163 | CodeFactory::BinaryOpIC(isolate(), op, strength(language_mode())).code(); |
| 2164 | CallIC(code, expr->BinaryOperationFeedbackId()); |
| 2165 | patch_site.EmitPatchInfo(); |
| 2166 | __ jmp(&done, Label::kNear); |
| 2167 | |
| 2168 | // Smi case. |
| 2169 | __ bind(&smi_case); |
| 2170 | __ mov(eax, edx); // Copy left operand in case of a stub call. |
| 2171 | |
| 2172 | switch (op) { |
| 2173 | case Token::SAR: |
| 2174 | __ SmiUntag(ecx); |
| 2175 | __ sar_cl(eax); // No checks of result necessary |
| 2176 | __ and_(eax, Immediate(~kSmiTagMask)); |
| 2177 | break; |
| 2178 | case Token::SHL: { |
| 2179 | Label result_ok; |
| 2180 | __ SmiUntag(eax); |
| 2181 | __ SmiUntag(ecx); |
| 2182 | __ shl_cl(eax); |
| 2183 | // Check that the *signed* result fits in a smi. |
| 2184 | __ cmp(eax, 0xc0000000); |
| 2185 | __ j(positive, &result_ok); |
| 2186 | __ SmiTag(ecx); |
| 2187 | __ jmp(&stub_call); |
| 2188 | __ bind(&result_ok); |
| 2189 | __ SmiTag(eax); |
| 2190 | break; |
| 2191 | } |
| 2192 | case Token::SHR: { |
| 2193 | Label result_ok; |
| 2194 | __ SmiUntag(eax); |
| 2195 | __ SmiUntag(ecx); |
| 2196 | __ shr_cl(eax); |
| 2197 | __ test(eax, Immediate(0xc0000000)); |
| 2198 | __ j(zero, &result_ok); |
| 2199 | __ SmiTag(ecx); |
| 2200 | __ jmp(&stub_call); |
| 2201 | __ bind(&result_ok); |
| 2202 | __ SmiTag(eax); |
| 2203 | break; |
| 2204 | } |
| 2205 | case Token::ADD: |
| 2206 | __ add(eax, ecx); |
| 2207 | __ j(overflow, &stub_call); |
| 2208 | break; |
| 2209 | case Token::SUB: |
| 2210 | __ sub(eax, ecx); |
| 2211 | __ j(overflow, &stub_call); |
| 2212 | break; |
| 2213 | case Token::MUL: { |
| 2214 | __ SmiUntag(eax); |
| 2215 | __ imul(eax, ecx); |
| 2216 | __ j(overflow, &stub_call); |
| 2217 | __ test(eax, eax); |
| 2218 | __ j(not_zero, &done, Label::kNear); |
| 2219 | __ mov(ebx, edx); |
| 2220 | __ or_(ebx, ecx); |
| 2221 | __ j(negative, &stub_call); |
| 2222 | break; |
| 2223 | } |
| 2224 | case Token::BIT_OR: |
| 2225 | __ or_(eax, ecx); |
| 2226 | break; |
| 2227 | case Token::BIT_AND: |
| 2228 | __ and_(eax, ecx); |
| 2229 | break; |
| 2230 | case Token::BIT_XOR: |
| 2231 | __ xor_(eax, ecx); |
| 2232 | break; |
| 2233 | default: |
| 2234 | UNREACHABLE(); |
| 2235 | } |
| 2236 | |
| 2237 | __ bind(&done); |
| 2238 | context()->Plug(eax); |
| 2239 | } |
| 2240 | |
| 2241 | |
| 2242 | void FullCodeGenerator::EmitClassDefineProperties(ClassLiteral* lit) { |
| 2243 | // Constructor is in eax. |
| 2244 | DCHECK(lit != NULL); |
| 2245 | __ push(eax); |
| 2246 | |
| 2247 | // No access check is needed here since the constructor is created by the |
| 2248 | // class literal. |
| 2249 | Register scratch = ebx; |
| 2250 | __ mov(scratch, FieldOperand(eax, JSFunction::kPrototypeOrInitialMapOffset)); |
| 2251 | __ Push(scratch); |
| 2252 | |
| 2253 | for (int i = 0; i < lit->properties()->length(); i++) { |
| 2254 | ObjectLiteral::Property* property = lit->properties()->at(i); |
| 2255 | Expression* value = property->value(); |
| 2256 | |
| 2257 | if (property->is_static()) { |
| 2258 | __ push(Operand(esp, kPointerSize)); // constructor |
| 2259 | } else { |
| 2260 | __ push(Operand(esp, 0)); // prototype |
| 2261 | } |
| 2262 | EmitPropertyKey(property, lit->GetIdForProperty(i)); |
| 2263 | |
| 2264 | // The static prototype property is read only. We handle the non computed |
| 2265 | // property name case in the parser. Since this is the only case where we |
| 2266 | // need to check for an own read only property we special case this so we do |
| 2267 | // not need to do this for every property. |
| 2268 | if (property->is_static() && property->is_computed_name()) { |
| 2269 | __ CallRuntime(Runtime::kThrowIfStaticPrototype); |
| 2270 | __ push(eax); |
| 2271 | } |
| 2272 | |
| 2273 | VisitForStackValue(value); |
| 2274 | if (NeedsHomeObject(value)) { |
| 2275 | EmitSetHomeObject(value, 2, property->GetSlot()); |
| 2276 | } |
| 2277 | |
| 2278 | switch (property->kind()) { |
| 2279 | case ObjectLiteral::Property::CONSTANT: |
| 2280 | case ObjectLiteral::Property::MATERIALIZED_LITERAL: |
| 2281 | case ObjectLiteral::Property::PROTOTYPE: |
| 2282 | UNREACHABLE(); |
| 2283 | case ObjectLiteral::Property::COMPUTED: |
| 2284 | __ CallRuntime(Runtime::kDefineClassMethod); |
| 2285 | break; |
| 2286 | |
| 2287 | case ObjectLiteral::Property::GETTER: |
| 2288 | __ push(Immediate(Smi::FromInt(DONT_ENUM))); |
| 2289 | __ CallRuntime(Runtime::kDefineGetterPropertyUnchecked); |
| 2290 | break; |
| 2291 | |
| 2292 | case ObjectLiteral::Property::SETTER: |
| 2293 | __ push(Immediate(Smi::FromInt(DONT_ENUM))); |
| 2294 | __ CallRuntime(Runtime::kDefineSetterPropertyUnchecked); |
| 2295 | break; |
| 2296 | } |
| 2297 | } |
| 2298 | |
| 2299 | // Set both the prototype and constructor to have fast properties, and also |
| 2300 | // freeze them in strong mode. |
| 2301 | __ CallRuntime(Runtime::kFinalizeClassDefinition); |
| 2302 | } |
| 2303 | |
| 2304 | |
| 2305 | void FullCodeGenerator::EmitBinaryOp(BinaryOperation* expr, Token::Value op) { |
| 2306 | __ pop(edx); |
| 2307 | Handle<Code> code = |
| 2308 | CodeFactory::BinaryOpIC(isolate(), op, strength(language_mode())).code(); |
| 2309 | JumpPatchSite patch_site(masm_); // unbound, signals no inlined smi code. |
| 2310 | CallIC(code, expr->BinaryOperationFeedbackId()); |
| 2311 | patch_site.EmitPatchInfo(); |
| 2312 | context()->Plug(eax); |
| 2313 | } |
| 2314 | |
| 2315 | |
| 2316 | void FullCodeGenerator::EmitAssignment(Expression* expr, |
| 2317 | FeedbackVectorSlot slot) { |
| 2318 | DCHECK(expr->IsValidReferenceExpressionOrThis()); |
| 2319 | |
| 2320 | Property* prop = expr->AsProperty(); |
| 2321 | LhsKind assign_type = Property::GetAssignType(prop); |
| 2322 | |
| 2323 | switch (assign_type) { |
| 2324 | case VARIABLE: { |
| 2325 | Variable* var = expr->AsVariableProxy()->var(); |
| 2326 | EffectContext context(this); |
| 2327 | EmitVariableAssignment(var, Token::ASSIGN, slot); |
| 2328 | break; |
| 2329 | } |
| 2330 | case NAMED_PROPERTY: { |
| 2331 | __ push(eax); // Preserve value. |
| 2332 | VisitForAccumulatorValue(prop->obj()); |
| 2333 | __ Move(StoreDescriptor::ReceiverRegister(), eax); |
| 2334 | __ pop(StoreDescriptor::ValueRegister()); // Restore value. |
| 2335 | __ mov(StoreDescriptor::NameRegister(), |
| 2336 | prop->key()->AsLiteral()->value()); |
| 2337 | EmitLoadStoreICSlot(slot); |
| 2338 | CallStoreIC(); |
| 2339 | break; |
| 2340 | } |
| 2341 | case NAMED_SUPER_PROPERTY: { |
| 2342 | __ push(eax); |
| 2343 | VisitForStackValue(prop->obj()->AsSuperPropertyReference()->this_var()); |
| 2344 | VisitForAccumulatorValue( |
| 2345 | prop->obj()->AsSuperPropertyReference()->home_object()); |
| 2346 | // stack: value, this; eax: home_object |
| 2347 | Register scratch = ecx; |
| 2348 | Register scratch2 = edx; |
| 2349 | __ mov(scratch, result_register()); // home_object |
| 2350 | __ mov(eax, MemOperand(esp, kPointerSize)); // value |
| 2351 | __ mov(scratch2, MemOperand(esp, 0)); // this |
| 2352 | __ mov(MemOperand(esp, kPointerSize), scratch2); // this |
| 2353 | __ mov(MemOperand(esp, 0), scratch); // home_object |
| 2354 | // stack: this, home_object. eax: value |
| 2355 | EmitNamedSuperPropertyStore(prop); |
| 2356 | break; |
| 2357 | } |
| 2358 | case KEYED_SUPER_PROPERTY: { |
| 2359 | __ push(eax); |
| 2360 | VisitForStackValue(prop->obj()->AsSuperPropertyReference()->this_var()); |
| 2361 | VisitForStackValue( |
| 2362 | prop->obj()->AsSuperPropertyReference()->home_object()); |
| 2363 | VisitForAccumulatorValue(prop->key()); |
| 2364 | Register scratch = ecx; |
| 2365 | Register scratch2 = edx; |
| 2366 | __ mov(scratch2, MemOperand(esp, 2 * kPointerSize)); // value |
| 2367 | // stack: value, this, home_object; eax: key, edx: value |
| 2368 | __ mov(scratch, MemOperand(esp, kPointerSize)); // this |
| 2369 | __ mov(MemOperand(esp, 2 * kPointerSize), scratch); |
| 2370 | __ mov(scratch, MemOperand(esp, 0)); // home_object |
| 2371 | __ mov(MemOperand(esp, kPointerSize), scratch); |
| 2372 | __ mov(MemOperand(esp, 0), eax); |
| 2373 | __ mov(eax, scratch2); |
| 2374 | // stack: this, home_object, key; eax: value. |
| 2375 | EmitKeyedSuperPropertyStore(prop); |
| 2376 | break; |
| 2377 | } |
| 2378 | case KEYED_PROPERTY: { |
| 2379 | __ push(eax); // Preserve value. |
| 2380 | VisitForStackValue(prop->obj()); |
| 2381 | VisitForAccumulatorValue(prop->key()); |
| 2382 | __ Move(StoreDescriptor::NameRegister(), eax); |
| 2383 | __ pop(StoreDescriptor::ReceiverRegister()); // Receiver. |
| 2384 | __ pop(StoreDescriptor::ValueRegister()); // Restore value. |
| 2385 | EmitLoadStoreICSlot(slot); |
| 2386 | Handle<Code> ic = |
| 2387 | CodeFactory::KeyedStoreIC(isolate(), language_mode()).code(); |
| 2388 | CallIC(ic); |
| 2389 | break; |
| 2390 | } |
| 2391 | } |
| 2392 | context()->Plug(eax); |
| 2393 | } |
| 2394 | |
| 2395 | |
| 2396 | void FullCodeGenerator::EmitStoreToStackLocalOrContextSlot( |
| 2397 | Variable* var, MemOperand location) { |
| 2398 | __ mov(location, eax); |
| 2399 | if (var->IsContextSlot()) { |
| 2400 | __ mov(edx, eax); |
| 2401 | int offset = Context::SlotOffset(var->index()); |
| 2402 | __ RecordWriteContextSlot(ecx, offset, edx, ebx, kDontSaveFPRegs); |
| 2403 | } |
| 2404 | } |
| 2405 | |
| 2406 | |
| 2407 | void FullCodeGenerator::EmitVariableAssignment(Variable* var, Token::Value op, |
| 2408 | FeedbackVectorSlot slot) { |
| 2409 | if (var->IsUnallocated()) { |
| 2410 | // Global var, const, or let. |
| 2411 | __ mov(StoreDescriptor::NameRegister(), var->name()); |
| 2412 | __ mov(StoreDescriptor::ReceiverRegister(), NativeContextOperand()); |
| 2413 | __ mov(StoreDescriptor::ReceiverRegister(), |
| 2414 | ContextOperand(StoreDescriptor::ReceiverRegister(), |
| 2415 | Context::EXTENSION_INDEX)); |
| 2416 | EmitLoadStoreICSlot(slot); |
| 2417 | CallStoreIC(); |
| 2418 | |
| 2419 | } else if (var->mode() == LET && op != Token::INIT) { |
| 2420 | // Non-initializing assignment to let variable needs a write barrier. |
| 2421 | DCHECK(!var->IsLookupSlot()); |
| 2422 | DCHECK(var->IsStackAllocated() || var->IsContextSlot()); |
| 2423 | Label assign; |
| 2424 | MemOperand location = VarOperand(var, ecx); |
| 2425 | __ mov(edx, location); |
| 2426 | __ cmp(edx, isolate()->factory()->the_hole_value()); |
| 2427 | __ j(not_equal, &assign, Label::kNear); |
| 2428 | __ push(Immediate(var->name())); |
| 2429 | __ CallRuntime(Runtime::kThrowReferenceError); |
| 2430 | __ bind(&assign); |
| 2431 | EmitStoreToStackLocalOrContextSlot(var, location); |
| 2432 | |
| 2433 | } else if (var->mode() == CONST && op != Token::INIT) { |
| 2434 | // Assignment to const variable needs a write barrier. |
| 2435 | DCHECK(!var->IsLookupSlot()); |
| 2436 | DCHECK(var->IsStackAllocated() || var->IsContextSlot()); |
| 2437 | Label const_error; |
| 2438 | MemOperand location = VarOperand(var, ecx); |
| 2439 | __ mov(edx, location); |
| 2440 | __ cmp(edx, isolate()->factory()->the_hole_value()); |
| 2441 | __ j(not_equal, &const_error, Label::kNear); |
| 2442 | __ push(Immediate(var->name())); |
| 2443 | __ CallRuntime(Runtime::kThrowReferenceError); |
| 2444 | __ bind(&const_error); |
| 2445 | __ CallRuntime(Runtime::kThrowConstAssignError); |
| 2446 | |
| 2447 | } else if (var->is_this() && var->mode() == CONST && op == Token::INIT) { |
| 2448 | // Initializing assignment to const {this} needs a write barrier. |
| 2449 | DCHECK(var->IsStackAllocated() || var->IsContextSlot()); |
| 2450 | Label uninitialized_this; |
| 2451 | MemOperand location = VarOperand(var, ecx); |
| 2452 | __ mov(edx, location); |
| 2453 | __ cmp(edx, isolate()->factory()->the_hole_value()); |
| 2454 | __ j(equal, &uninitialized_this); |
| 2455 | __ push(Immediate(var->name())); |
| 2456 | __ CallRuntime(Runtime::kThrowReferenceError); |
| 2457 | __ bind(&uninitialized_this); |
| 2458 | EmitStoreToStackLocalOrContextSlot(var, location); |
| 2459 | |
| 2460 | } else if (!var->is_const_mode() || |
| 2461 | (var->mode() == CONST && op == Token::INIT)) { |
| 2462 | if (var->IsLookupSlot()) { |
| 2463 | // Assignment to var. |
| 2464 | __ push(eax); // Value. |
| 2465 | __ push(esi); // Context. |
| 2466 | __ push(Immediate(var->name())); |
| 2467 | __ push(Immediate(Smi::FromInt(language_mode()))); |
| 2468 | __ CallRuntime(Runtime::kStoreLookupSlot); |
| 2469 | } else { |
| 2470 | // Assignment to var or initializing assignment to let/const in harmony |
| 2471 | // mode. |
| 2472 | DCHECK(var->IsStackAllocated() || var->IsContextSlot()); |
| 2473 | MemOperand location = VarOperand(var, ecx); |
| 2474 | if (generate_debug_code_ && var->mode() == LET && op == Token::INIT) { |
| 2475 | // Check for an uninitialized let binding. |
| 2476 | __ mov(edx, location); |
| 2477 | __ cmp(edx, isolate()->factory()->the_hole_value()); |
| 2478 | __ Check(equal, kLetBindingReInitialization); |
| 2479 | } |
| 2480 | EmitStoreToStackLocalOrContextSlot(var, location); |
| 2481 | } |
| 2482 | |
| 2483 | } else if (var->mode() == CONST_LEGACY && op == Token::INIT) { |
| 2484 | // Const initializers need a write barrier. |
| 2485 | DCHECK(!var->IsParameter()); // No const parameters. |
| 2486 | if (var->IsLookupSlot()) { |
| 2487 | __ push(eax); |
| 2488 | __ push(esi); |
| 2489 | __ push(Immediate(var->name())); |
| 2490 | __ CallRuntime(Runtime::kInitializeLegacyConstLookupSlot); |
| 2491 | } else { |
| 2492 | DCHECK(var->IsStackLocal() || var->IsContextSlot()); |
| 2493 | Label skip; |
| 2494 | MemOperand location = VarOperand(var, ecx); |
| 2495 | __ mov(edx, location); |
| 2496 | __ cmp(edx, isolate()->factory()->the_hole_value()); |
| 2497 | __ j(not_equal, &skip, Label::kNear); |
| 2498 | EmitStoreToStackLocalOrContextSlot(var, location); |
| 2499 | __ bind(&skip); |
| 2500 | } |
| 2501 | |
| 2502 | } else { |
| 2503 | DCHECK(var->mode() == CONST_LEGACY && op != Token::INIT); |
| 2504 | if (is_strict(language_mode())) { |
| 2505 | __ CallRuntime(Runtime::kThrowConstAssignError); |
| 2506 | } |
| 2507 | // Silently ignore store in sloppy mode. |
| 2508 | } |
| 2509 | } |
| 2510 | |
| 2511 | |
| 2512 | void FullCodeGenerator::EmitNamedPropertyAssignment(Assignment* expr) { |
| 2513 | // Assignment to a property, using a named store IC. |
| 2514 | // eax : value |
| 2515 | // esp[0] : receiver |
| 2516 | Property* prop = expr->target()->AsProperty(); |
| 2517 | DCHECK(prop != NULL); |
| 2518 | DCHECK(prop->key()->IsLiteral()); |
| 2519 | |
| 2520 | __ mov(StoreDescriptor::NameRegister(), prop->key()->AsLiteral()->value()); |
| 2521 | __ pop(StoreDescriptor::ReceiverRegister()); |
| 2522 | EmitLoadStoreICSlot(expr->AssignmentSlot()); |
| 2523 | CallStoreIC(); |
| 2524 | PrepareForBailoutForId(expr->AssignmentId(), TOS_REG); |
| 2525 | context()->Plug(eax); |
| 2526 | } |
| 2527 | |
| 2528 | |
| 2529 | void FullCodeGenerator::EmitNamedSuperPropertyStore(Property* prop) { |
| 2530 | // Assignment to named property of super. |
| 2531 | // eax : value |
| 2532 | // stack : receiver ('this'), home_object |
| 2533 | DCHECK(prop != NULL); |
| 2534 | Literal* key = prop->key()->AsLiteral(); |
| 2535 | DCHECK(key != NULL); |
| 2536 | |
| 2537 | __ push(Immediate(key->value())); |
| 2538 | __ push(eax); |
| 2539 | __ CallRuntime((is_strict(language_mode()) ? Runtime::kStoreToSuper_Strict |
| 2540 | : Runtime::kStoreToSuper_Sloppy)); |
| 2541 | } |
| 2542 | |
| 2543 | |
| 2544 | void FullCodeGenerator::EmitKeyedSuperPropertyStore(Property* prop) { |
| 2545 | // Assignment to named property of super. |
| 2546 | // eax : value |
| 2547 | // stack : receiver ('this'), home_object, key |
| 2548 | |
| 2549 | __ push(eax); |
| 2550 | __ CallRuntime((is_strict(language_mode()) |
| 2551 | ? Runtime::kStoreKeyedToSuper_Strict |
| 2552 | : Runtime::kStoreKeyedToSuper_Sloppy)); |
| 2553 | } |
| 2554 | |
| 2555 | |
| 2556 | void FullCodeGenerator::EmitKeyedPropertyAssignment(Assignment* expr) { |
| 2557 | // Assignment to a property, using a keyed store IC. |
| 2558 | // eax : value |
| 2559 | // esp[0] : key |
| 2560 | // esp[kPointerSize] : receiver |
| 2561 | |
| 2562 | __ pop(StoreDescriptor::NameRegister()); // Key. |
| 2563 | __ pop(StoreDescriptor::ReceiverRegister()); |
| 2564 | DCHECK(StoreDescriptor::ValueRegister().is(eax)); |
| 2565 | Handle<Code> ic = |
| 2566 | CodeFactory::KeyedStoreIC(isolate(), language_mode()).code(); |
| 2567 | EmitLoadStoreICSlot(expr->AssignmentSlot()); |
| 2568 | CallIC(ic); |
| 2569 | PrepareForBailoutForId(expr->AssignmentId(), TOS_REG); |
| 2570 | context()->Plug(eax); |
| 2571 | } |
| 2572 | |
| 2573 | |
| 2574 | void FullCodeGenerator::VisitProperty(Property* expr) { |
| 2575 | Comment cmnt(masm_, "[ Property"); |
| 2576 | SetExpressionPosition(expr); |
| 2577 | |
| 2578 | Expression* key = expr->key(); |
| 2579 | |
| 2580 | if (key->IsPropertyName()) { |
| 2581 | if (!expr->IsSuperAccess()) { |
| 2582 | VisitForAccumulatorValue(expr->obj()); |
| 2583 | __ Move(LoadDescriptor::ReceiverRegister(), result_register()); |
| 2584 | EmitNamedPropertyLoad(expr); |
| 2585 | } else { |
| 2586 | VisitForStackValue(expr->obj()->AsSuperPropertyReference()->this_var()); |
| 2587 | VisitForStackValue( |
| 2588 | expr->obj()->AsSuperPropertyReference()->home_object()); |
| 2589 | EmitNamedSuperPropertyLoad(expr); |
| 2590 | } |
| 2591 | } else { |
| 2592 | if (!expr->IsSuperAccess()) { |
| 2593 | VisitForStackValue(expr->obj()); |
| 2594 | VisitForAccumulatorValue(expr->key()); |
| 2595 | __ pop(LoadDescriptor::ReceiverRegister()); // Object. |
| 2596 | __ Move(LoadDescriptor::NameRegister(), result_register()); // Key. |
| 2597 | EmitKeyedPropertyLoad(expr); |
| 2598 | } else { |
| 2599 | VisitForStackValue(expr->obj()->AsSuperPropertyReference()->this_var()); |
| 2600 | VisitForStackValue( |
| 2601 | expr->obj()->AsSuperPropertyReference()->home_object()); |
| 2602 | VisitForStackValue(expr->key()); |
| 2603 | EmitKeyedSuperPropertyLoad(expr); |
| 2604 | } |
| 2605 | } |
| 2606 | PrepareForBailoutForId(expr->LoadId(), TOS_REG); |
| 2607 | context()->Plug(eax); |
| 2608 | } |
| 2609 | |
| 2610 | |
| 2611 | void FullCodeGenerator::CallIC(Handle<Code> code, |
| 2612 | TypeFeedbackId ast_id) { |
| 2613 | ic_total_count_++; |
| 2614 | __ call(code, RelocInfo::CODE_TARGET, ast_id); |
| 2615 | } |
| 2616 | |
| 2617 | |
| 2618 | // Code common for calls using the IC. |
| 2619 | void FullCodeGenerator::EmitCallWithLoadIC(Call* expr) { |
| 2620 | Expression* callee = expr->expression(); |
| 2621 | |
| 2622 | // Get the target function. |
| 2623 | ConvertReceiverMode convert_mode; |
| 2624 | if (callee->IsVariableProxy()) { |
| 2625 | { StackValueContext context(this); |
| 2626 | EmitVariableLoad(callee->AsVariableProxy()); |
| 2627 | PrepareForBailout(callee, NO_REGISTERS); |
| 2628 | } |
| 2629 | // Push undefined as receiver. This is patched in the method prologue if it |
| 2630 | // is a sloppy mode method. |
| 2631 | __ push(Immediate(isolate()->factory()->undefined_value())); |
| 2632 | convert_mode = ConvertReceiverMode::kNullOrUndefined; |
| 2633 | } else { |
| 2634 | // Load the function from the receiver. |
| 2635 | DCHECK(callee->IsProperty()); |
| 2636 | DCHECK(!callee->AsProperty()->IsSuperAccess()); |
| 2637 | __ mov(LoadDescriptor::ReceiverRegister(), Operand(esp, 0)); |
| 2638 | EmitNamedPropertyLoad(callee->AsProperty()); |
| 2639 | PrepareForBailoutForId(callee->AsProperty()->LoadId(), TOS_REG); |
| 2640 | // Push the target function under the receiver. |
| 2641 | __ push(Operand(esp, 0)); |
| 2642 | __ mov(Operand(esp, kPointerSize), eax); |
| 2643 | convert_mode = ConvertReceiverMode::kNotNullOrUndefined; |
| 2644 | } |
| 2645 | |
| 2646 | EmitCall(expr, convert_mode); |
| 2647 | } |
| 2648 | |
| 2649 | |
| 2650 | void FullCodeGenerator::EmitSuperCallWithLoadIC(Call* expr) { |
| 2651 | SetExpressionPosition(expr); |
| 2652 | Expression* callee = expr->expression(); |
| 2653 | DCHECK(callee->IsProperty()); |
| 2654 | Property* prop = callee->AsProperty(); |
| 2655 | DCHECK(prop->IsSuperAccess()); |
| 2656 | |
| 2657 | Literal* key = prop->key()->AsLiteral(); |
| 2658 | DCHECK(!key->value()->IsSmi()); |
| 2659 | // Load the function from the receiver. |
| 2660 | SuperPropertyReference* super_ref = prop->obj()->AsSuperPropertyReference(); |
| 2661 | VisitForStackValue(super_ref->home_object()); |
| 2662 | VisitForAccumulatorValue(super_ref->this_var()); |
| 2663 | __ push(eax); |
| 2664 | __ push(eax); |
| 2665 | __ push(Operand(esp, kPointerSize * 2)); |
| 2666 | __ push(Immediate(key->value())); |
| 2667 | __ push(Immediate(Smi::FromInt(language_mode()))); |
| 2668 | // Stack here: |
| 2669 | // - home_object |
| 2670 | // - this (receiver) |
| 2671 | // - this (receiver) <-- LoadFromSuper will pop here and below. |
| 2672 | // - home_object |
| 2673 | // - key |
| 2674 | // - language_mode |
| 2675 | __ CallRuntime(Runtime::kLoadFromSuper); |
| 2676 | |
| 2677 | // Replace home_object with target function. |
| 2678 | __ mov(Operand(esp, kPointerSize), eax); |
| 2679 | |
| 2680 | // Stack here: |
| 2681 | // - target function |
| 2682 | // - this (receiver) |
| 2683 | EmitCall(expr); |
| 2684 | } |
| 2685 | |
| 2686 | |
| 2687 | // Code common for calls using the IC. |
| 2688 | void FullCodeGenerator::EmitKeyedCallWithLoadIC(Call* expr, |
| 2689 | Expression* key) { |
| 2690 | // Load the key. |
| 2691 | VisitForAccumulatorValue(key); |
| 2692 | |
| 2693 | Expression* callee = expr->expression(); |
| 2694 | |
| 2695 | // Load the function from the receiver. |
| 2696 | DCHECK(callee->IsProperty()); |
| 2697 | __ mov(LoadDescriptor::ReceiverRegister(), Operand(esp, 0)); |
| 2698 | __ mov(LoadDescriptor::NameRegister(), eax); |
| 2699 | EmitKeyedPropertyLoad(callee->AsProperty()); |
| 2700 | PrepareForBailoutForId(callee->AsProperty()->LoadId(), TOS_REG); |
| 2701 | |
| 2702 | // Push the target function under the receiver. |
| 2703 | __ push(Operand(esp, 0)); |
| 2704 | __ mov(Operand(esp, kPointerSize), eax); |
| 2705 | |
| 2706 | EmitCall(expr, ConvertReceiverMode::kNotNullOrUndefined); |
| 2707 | } |
| 2708 | |
| 2709 | |
| 2710 | void FullCodeGenerator::EmitKeyedSuperCallWithLoadIC(Call* expr) { |
| 2711 | Expression* callee = expr->expression(); |
| 2712 | DCHECK(callee->IsProperty()); |
| 2713 | Property* prop = callee->AsProperty(); |
| 2714 | DCHECK(prop->IsSuperAccess()); |
| 2715 | |
| 2716 | SetExpressionPosition(prop); |
| 2717 | // Load the function from the receiver. |
| 2718 | SuperPropertyReference* super_ref = prop->obj()->AsSuperPropertyReference(); |
| 2719 | VisitForStackValue(super_ref->home_object()); |
| 2720 | VisitForAccumulatorValue(super_ref->this_var()); |
| 2721 | __ push(eax); |
| 2722 | __ push(eax); |
| 2723 | __ push(Operand(esp, kPointerSize * 2)); |
| 2724 | VisitForStackValue(prop->key()); |
| 2725 | __ push(Immediate(Smi::FromInt(language_mode()))); |
| 2726 | // Stack here: |
| 2727 | // - home_object |
| 2728 | // - this (receiver) |
| 2729 | // - this (receiver) <-- LoadKeyedFromSuper will pop here and below. |
| 2730 | // - home_object |
| 2731 | // - key |
| 2732 | // - language_mode |
| 2733 | __ CallRuntime(Runtime::kLoadKeyedFromSuper); |
| 2734 | |
| 2735 | // Replace home_object with target function. |
| 2736 | __ mov(Operand(esp, kPointerSize), eax); |
| 2737 | |
| 2738 | // Stack here: |
| 2739 | // - target function |
| 2740 | // - this (receiver) |
| 2741 | EmitCall(expr); |
| 2742 | } |
| 2743 | |
| 2744 | |
| 2745 | void FullCodeGenerator::EmitCall(Call* expr, ConvertReceiverMode mode) { |
| 2746 | // Load the arguments. |
| 2747 | ZoneList<Expression*>* args = expr->arguments(); |
| 2748 | int arg_count = args->length(); |
| 2749 | for (int i = 0; i < arg_count; i++) { |
| 2750 | VisitForStackValue(args->at(i)); |
| 2751 | } |
| 2752 | |
| 2753 | PrepareForBailoutForId(expr->CallId(), NO_REGISTERS); |
| 2754 | SetCallPosition(expr); |
| 2755 | Handle<Code> ic = CodeFactory::CallIC(isolate(), arg_count, mode).code(); |
| 2756 | __ Move(edx, Immediate(SmiFromSlot(expr->CallFeedbackICSlot()))); |
| 2757 | __ mov(edi, Operand(esp, (arg_count + 1) * kPointerSize)); |
| 2758 | // Don't assign a type feedback id to the IC, since type feedback is provided |
| 2759 | // by the vector above. |
| 2760 | CallIC(ic); |
| 2761 | |
| 2762 | RecordJSReturnSite(expr); |
| 2763 | |
| 2764 | // Restore context register. |
| 2765 | __ mov(esi, Operand(ebp, StandardFrameConstants::kContextOffset)); |
| 2766 | |
| 2767 | context()->DropAndPlug(1, eax); |
| 2768 | } |
| 2769 | |
| 2770 | |
| 2771 | void FullCodeGenerator::EmitResolvePossiblyDirectEval(int arg_count) { |
| 2772 | // Push copy of the first argument or undefined if it doesn't exist. |
| 2773 | if (arg_count > 0) { |
| 2774 | __ push(Operand(esp, arg_count * kPointerSize)); |
| 2775 | } else { |
| 2776 | __ push(Immediate(isolate()->factory()->undefined_value())); |
| 2777 | } |
| 2778 | |
| 2779 | // Push the enclosing function. |
| 2780 | __ push(Operand(ebp, JavaScriptFrameConstants::kFunctionOffset)); |
| 2781 | |
| 2782 | // Push the language mode. |
| 2783 | __ push(Immediate(Smi::FromInt(language_mode()))); |
| 2784 | |
| 2785 | // Push the start position of the scope the calls resides in. |
| 2786 | __ push(Immediate(Smi::FromInt(scope()->start_position()))); |
| 2787 | |
| 2788 | // Do the runtime call. |
| 2789 | __ CallRuntime(Runtime::kResolvePossiblyDirectEval); |
| 2790 | } |
| 2791 | |
| 2792 | |
| 2793 | // See http://www.ecma-international.org/ecma-262/6.0/#sec-function-calls. |
| 2794 | void FullCodeGenerator::PushCalleeAndWithBaseObject(Call* expr) { |
| 2795 | VariableProxy* callee = expr->expression()->AsVariableProxy(); |
| 2796 | if (callee->var()->IsLookupSlot()) { |
| 2797 | Label slow, done; |
| 2798 | SetExpressionPosition(callee); |
| 2799 | // Generate code for loading from variables potentially shadowed by |
| 2800 | // eval-introduced variables. |
| 2801 | EmitDynamicLookupFastCase(callee, NOT_INSIDE_TYPEOF, &slow, &done); |
| 2802 | |
| 2803 | __ bind(&slow); |
| 2804 | // Call the runtime to find the function to call (returned in eax) and |
| 2805 | // the object holding it (returned in edx). |
| 2806 | __ push(context_register()); |
| 2807 | __ push(Immediate(callee->name())); |
| 2808 | __ CallRuntime(Runtime::kLoadLookupSlot); |
| 2809 | __ push(eax); // Function. |
| 2810 | __ push(edx); // Receiver. |
| 2811 | PrepareForBailoutForId(expr->LookupId(), NO_REGISTERS); |
| 2812 | |
| 2813 | // If fast case code has been generated, emit code to push the function |
| 2814 | // and receiver and have the slow path jump around this code. |
| 2815 | if (done.is_linked()) { |
| 2816 | Label call; |
| 2817 | __ jmp(&call, Label::kNear); |
| 2818 | __ bind(&done); |
| 2819 | // Push function. |
| 2820 | __ push(eax); |
| 2821 | // The receiver is implicitly the global receiver. Indicate this by |
| 2822 | // passing the hole to the call function stub. |
| 2823 | __ push(Immediate(isolate()->factory()->undefined_value())); |
| 2824 | __ bind(&call); |
| 2825 | } |
| 2826 | } else { |
| 2827 | VisitForStackValue(callee); |
| 2828 | // refEnv.WithBaseObject() |
| 2829 | __ push(Immediate(isolate()->factory()->undefined_value())); |
| 2830 | } |
| 2831 | } |
| 2832 | |
| 2833 | |
| 2834 | void FullCodeGenerator::EmitPossiblyEvalCall(Call* expr) { |
| 2835 | // In a call to eval, we first call RuntimeHidden_ResolvePossiblyDirectEval |
| 2836 | // to resolve the function we need to call. Then we call the resolved |
| 2837 | // function using the given arguments. |
| 2838 | ZoneList<Expression*>* args = expr->arguments(); |
| 2839 | int arg_count = args->length(); |
| 2840 | |
| 2841 | PushCalleeAndWithBaseObject(expr); |
| 2842 | |
| 2843 | // Push the arguments. |
| 2844 | for (int i = 0; i < arg_count; i++) { |
| 2845 | VisitForStackValue(args->at(i)); |
| 2846 | } |
| 2847 | |
| 2848 | // Push a copy of the function (found below the arguments) and |
| 2849 | // resolve eval. |
| 2850 | __ push(Operand(esp, (arg_count + 1) * kPointerSize)); |
| 2851 | EmitResolvePossiblyDirectEval(arg_count); |
| 2852 | |
| 2853 | // Touch up the stack with the resolved function. |
| 2854 | __ mov(Operand(esp, (arg_count + 1) * kPointerSize), eax); |
| 2855 | |
| 2856 | PrepareForBailoutForId(expr->EvalId(), NO_REGISTERS); |
| 2857 | |
| 2858 | SetCallPosition(expr); |
| 2859 | __ mov(edi, Operand(esp, (arg_count + 1) * kPointerSize)); |
| 2860 | __ Set(eax, arg_count); |
| 2861 | __ Call(isolate()->builtins()->Call(), RelocInfo::CODE_TARGET); |
| 2862 | RecordJSReturnSite(expr); |
| 2863 | // Restore context register. |
| 2864 | __ mov(esi, Operand(ebp, StandardFrameConstants::kContextOffset)); |
| 2865 | context()->DropAndPlug(1, eax); |
| 2866 | } |
| 2867 | |
| 2868 | |
| 2869 | void FullCodeGenerator::VisitCallNew(CallNew* expr) { |
| 2870 | Comment cmnt(masm_, "[ CallNew"); |
| 2871 | // According to ECMA-262, section 11.2.2, page 44, the function |
| 2872 | // expression in new calls must be evaluated before the |
| 2873 | // arguments. |
| 2874 | |
| 2875 | // Push constructor on the stack. If it's not a function it's used as |
| 2876 | // receiver for CALL_NON_FUNCTION, otherwise the value on the stack is |
| 2877 | // ignored. |
| 2878 | DCHECK(!expr->expression()->IsSuperPropertyReference()); |
| 2879 | VisitForStackValue(expr->expression()); |
| 2880 | |
| 2881 | // Push the arguments ("left-to-right") on the stack. |
| 2882 | ZoneList<Expression*>* args = expr->arguments(); |
| 2883 | int arg_count = args->length(); |
| 2884 | for (int i = 0; i < arg_count; i++) { |
| 2885 | VisitForStackValue(args->at(i)); |
| 2886 | } |
| 2887 | |
| 2888 | // Call the construct call builtin that handles allocation and |
| 2889 | // constructor invocation. |
| 2890 | SetConstructCallPosition(expr); |
| 2891 | |
| 2892 | // Load function and argument count into edi and eax. |
| 2893 | __ Move(eax, Immediate(arg_count)); |
| 2894 | __ mov(edi, Operand(esp, arg_count * kPointerSize)); |
| 2895 | |
| 2896 | // Record call targets in unoptimized code. |
| 2897 | __ EmitLoadTypeFeedbackVector(ebx); |
| 2898 | __ mov(edx, Immediate(SmiFromSlot(expr->CallNewFeedbackSlot()))); |
| 2899 | |
| 2900 | CallConstructStub stub(isolate()); |
| 2901 | __ call(stub.GetCode(), RelocInfo::CODE_TARGET); |
| 2902 | PrepareForBailoutForId(expr->ReturnId(), TOS_REG); |
| 2903 | // Restore context register. |
| 2904 | __ mov(esi, Operand(ebp, StandardFrameConstants::kContextOffset)); |
| 2905 | context()->Plug(eax); |
| 2906 | } |
| 2907 | |
| 2908 | |
| 2909 | void FullCodeGenerator::EmitSuperConstructorCall(Call* expr) { |
| 2910 | SuperCallReference* super_call_ref = |
| 2911 | expr->expression()->AsSuperCallReference(); |
| 2912 | DCHECK_NOT_NULL(super_call_ref); |
| 2913 | |
| 2914 | // Push the super constructor target on the stack (may be null, |
| 2915 | // but the Construct builtin can deal with that properly). |
| 2916 | VisitForAccumulatorValue(super_call_ref->this_function_var()); |
| 2917 | __ AssertFunction(result_register()); |
| 2918 | __ mov(result_register(), |
| 2919 | FieldOperand(result_register(), HeapObject::kMapOffset)); |
| 2920 | __ Push(FieldOperand(result_register(), Map::kPrototypeOffset)); |
| 2921 | |
| 2922 | // Push the arguments ("left-to-right") on the stack. |
| 2923 | ZoneList<Expression*>* args = expr->arguments(); |
| 2924 | int arg_count = args->length(); |
| 2925 | for (int i = 0; i < arg_count; i++) { |
| 2926 | VisitForStackValue(args->at(i)); |
| 2927 | } |
| 2928 | |
| 2929 | // Call the construct call builtin that handles allocation and |
| 2930 | // constructor invocation. |
| 2931 | SetConstructCallPosition(expr); |
| 2932 | |
| 2933 | // Load new target into edx. |
| 2934 | VisitForAccumulatorValue(super_call_ref->new_target_var()); |
| 2935 | __ mov(edx, result_register()); |
| 2936 | |
| 2937 | // Load function and argument count into edi and eax. |
| 2938 | __ Move(eax, Immediate(arg_count)); |
| 2939 | __ mov(edi, Operand(esp, arg_count * kPointerSize)); |
| 2940 | |
| 2941 | __ Call(isolate()->builtins()->Construct(), RelocInfo::CODE_TARGET); |
| 2942 | |
| 2943 | RecordJSReturnSite(expr); |
| 2944 | |
| 2945 | // Restore context register. |
| 2946 | __ mov(esi, Operand(ebp, StandardFrameConstants::kContextOffset)); |
| 2947 | context()->Plug(eax); |
| 2948 | } |
| 2949 | |
| 2950 | |
| 2951 | void FullCodeGenerator::EmitIsSmi(CallRuntime* expr) { |
| 2952 | ZoneList<Expression*>* args = expr->arguments(); |
| 2953 | DCHECK(args->length() == 1); |
| 2954 | |
| 2955 | VisitForAccumulatorValue(args->at(0)); |
| 2956 | |
| 2957 | Label materialize_true, materialize_false; |
| 2958 | Label* if_true = NULL; |
| 2959 | Label* if_false = NULL; |
| 2960 | Label* fall_through = NULL; |
| 2961 | context()->PrepareTest(&materialize_true, &materialize_false, |
| 2962 | &if_true, &if_false, &fall_through); |
| 2963 | |
| 2964 | PrepareForBailoutBeforeSplit(expr, true, if_true, if_false); |
| 2965 | __ test(eax, Immediate(kSmiTagMask)); |
| 2966 | Split(zero, if_true, if_false, fall_through); |
| 2967 | |
| 2968 | context()->Plug(if_true, if_false); |
| 2969 | } |
| 2970 | |
| 2971 | |
| 2972 | void FullCodeGenerator::EmitIsJSReceiver(CallRuntime* expr) { |
| 2973 | ZoneList<Expression*>* args = expr->arguments(); |
| 2974 | DCHECK(args->length() == 1); |
| 2975 | |
| 2976 | VisitForAccumulatorValue(args->at(0)); |
| 2977 | |
| 2978 | Label materialize_true, materialize_false; |
| 2979 | Label* if_true = NULL; |
| 2980 | Label* if_false = NULL; |
| 2981 | Label* fall_through = NULL; |
| 2982 | context()->PrepareTest(&materialize_true, &materialize_false, |
| 2983 | &if_true, &if_false, &fall_through); |
| 2984 | |
| 2985 | __ JumpIfSmi(eax, if_false); |
| 2986 | __ CmpObjectType(eax, FIRST_JS_RECEIVER_TYPE, ebx); |
| 2987 | PrepareForBailoutBeforeSplit(expr, true, if_true, if_false); |
| 2988 | Split(above_equal, if_true, if_false, fall_through); |
| 2989 | |
| 2990 | context()->Plug(if_true, if_false); |
| 2991 | } |
| 2992 | |
| 2993 | |
| 2994 | void FullCodeGenerator::EmitIsSimdValue(CallRuntime* expr) { |
| 2995 | ZoneList<Expression*>* args = expr->arguments(); |
| 2996 | DCHECK(args->length() == 1); |
| 2997 | |
| 2998 | VisitForAccumulatorValue(args->at(0)); |
| 2999 | |
| 3000 | Label materialize_true, materialize_false; |
| 3001 | Label* if_true = NULL; |
| 3002 | Label* if_false = NULL; |
| 3003 | Label* fall_through = NULL; |
| 3004 | context()->PrepareTest(&materialize_true, &materialize_false, &if_true, |
| 3005 | &if_false, &fall_through); |
| 3006 | |
| 3007 | __ JumpIfSmi(eax, if_false); |
| 3008 | __ CmpObjectType(eax, SIMD128_VALUE_TYPE, ebx); |
| 3009 | PrepareForBailoutBeforeSplit(expr, true, if_true, if_false); |
| 3010 | Split(equal, if_true, if_false, fall_through); |
| 3011 | |
| 3012 | context()->Plug(if_true, if_false); |
| 3013 | } |
| 3014 | |
| 3015 | |
| 3016 | void FullCodeGenerator::EmitIsFunction(CallRuntime* expr) { |
| 3017 | ZoneList<Expression*>* args = expr->arguments(); |
| 3018 | DCHECK(args->length() == 1); |
| 3019 | |
| 3020 | VisitForAccumulatorValue(args->at(0)); |
| 3021 | |
| 3022 | Label materialize_true, materialize_false; |
| 3023 | Label* if_true = NULL; |
| 3024 | Label* if_false = NULL; |
| 3025 | Label* fall_through = NULL; |
| 3026 | context()->PrepareTest(&materialize_true, &materialize_false, |
| 3027 | &if_true, &if_false, &fall_through); |
| 3028 | |
| 3029 | __ JumpIfSmi(eax, if_false); |
| 3030 | __ CmpObjectType(eax, FIRST_FUNCTION_TYPE, ebx); |
| 3031 | PrepareForBailoutBeforeSplit(expr, true, if_true, if_false); |
| 3032 | Split(above_equal, if_true, if_false, fall_through); |
| 3033 | |
| 3034 | context()->Plug(if_true, if_false); |
| 3035 | } |
| 3036 | |
| 3037 | |
| 3038 | void FullCodeGenerator::EmitIsMinusZero(CallRuntime* expr) { |
| 3039 | ZoneList<Expression*>* args = expr->arguments(); |
| 3040 | DCHECK(args->length() == 1); |
| 3041 | |
| 3042 | VisitForAccumulatorValue(args->at(0)); |
| 3043 | |
| 3044 | Label materialize_true, materialize_false; |
| 3045 | Label* if_true = NULL; |
| 3046 | Label* if_false = NULL; |
| 3047 | Label* fall_through = NULL; |
| 3048 | context()->PrepareTest(&materialize_true, &materialize_false, |
| 3049 | &if_true, &if_false, &fall_through); |
| 3050 | |
| 3051 | Handle<Map> map = masm()->isolate()->factory()->heap_number_map(); |
| 3052 | __ CheckMap(eax, map, if_false, DO_SMI_CHECK); |
| 3053 | // Check if the exponent half is 0x80000000. Comparing against 1 and |
| 3054 | // checking for overflow is the shortest possible encoding. |
| 3055 | __ cmp(FieldOperand(eax, HeapNumber::kExponentOffset), Immediate(0x1)); |
| 3056 | __ j(no_overflow, if_false); |
| 3057 | __ cmp(FieldOperand(eax, HeapNumber::kMantissaOffset), Immediate(0x0)); |
| 3058 | PrepareForBailoutBeforeSplit(expr, true, if_true, if_false); |
| 3059 | Split(equal, if_true, if_false, fall_through); |
| 3060 | |
| 3061 | context()->Plug(if_true, if_false); |
| 3062 | } |
| 3063 | |
| 3064 | |
| 3065 | void FullCodeGenerator::EmitIsArray(CallRuntime* expr) { |
| 3066 | ZoneList<Expression*>* args = expr->arguments(); |
| 3067 | DCHECK(args->length() == 1); |
| 3068 | |
| 3069 | VisitForAccumulatorValue(args->at(0)); |
| 3070 | |
| 3071 | Label materialize_true, materialize_false; |
| 3072 | Label* if_true = NULL; |
| 3073 | Label* if_false = NULL; |
| 3074 | Label* fall_through = NULL; |
| 3075 | context()->PrepareTest(&materialize_true, &materialize_false, |
| 3076 | &if_true, &if_false, &fall_through); |
| 3077 | |
| 3078 | __ JumpIfSmi(eax, if_false); |
| 3079 | __ CmpObjectType(eax, JS_ARRAY_TYPE, ebx); |
| 3080 | PrepareForBailoutBeforeSplit(expr, true, if_true, if_false); |
| 3081 | Split(equal, if_true, if_false, fall_through); |
| 3082 | |
| 3083 | context()->Plug(if_true, if_false); |
| 3084 | } |
| 3085 | |
| 3086 | |
| 3087 | void FullCodeGenerator::EmitIsTypedArray(CallRuntime* expr) { |
| 3088 | ZoneList<Expression*>* args = expr->arguments(); |
| 3089 | DCHECK(args->length() == 1); |
| 3090 | |
| 3091 | VisitForAccumulatorValue(args->at(0)); |
| 3092 | |
| 3093 | Label materialize_true, materialize_false; |
| 3094 | Label* if_true = NULL; |
| 3095 | Label* if_false = NULL; |
| 3096 | Label* fall_through = NULL; |
| 3097 | context()->PrepareTest(&materialize_true, &materialize_false, &if_true, |
| 3098 | &if_false, &fall_through); |
| 3099 | |
| 3100 | __ JumpIfSmi(eax, if_false); |
| 3101 | __ CmpObjectType(eax, JS_TYPED_ARRAY_TYPE, ebx); |
| 3102 | PrepareForBailoutBeforeSplit(expr, true, if_true, if_false); |
| 3103 | Split(equal, if_true, if_false, fall_through); |
| 3104 | |
| 3105 | context()->Plug(if_true, if_false); |
| 3106 | } |
| 3107 | |
| 3108 | |
| 3109 | void FullCodeGenerator::EmitIsRegExp(CallRuntime* expr) { |
| 3110 | ZoneList<Expression*>* args = expr->arguments(); |
| 3111 | DCHECK(args->length() == 1); |
| 3112 | |
| 3113 | VisitForAccumulatorValue(args->at(0)); |
| 3114 | |
| 3115 | Label materialize_true, materialize_false; |
| 3116 | Label* if_true = NULL; |
| 3117 | Label* if_false = NULL; |
| 3118 | Label* fall_through = NULL; |
| 3119 | context()->PrepareTest(&materialize_true, &materialize_false, |
| 3120 | &if_true, &if_false, &fall_through); |
| 3121 | |
| 3122 | __ JumpIfSmi(eax, if_false); |
| 3123 | __ CmpObjectType(eax, JS_REGEXP_TYPE, ebx); |
| 3124 | PrepareForBailoutBeforeSplit(expr, true, if_true, if_false); |
| 3125 | Split(equal, if_true, if_false, fall_through); |
| 3126 | |
| 3127 | context()->Plug(if_true, if_false); |
| 3128 | } |
| 3129 | |
| 3130 | |
| 3131 | void FullCodeGenerator::EmitIsJSProxy(CallRuntime* expr) { |
| 3132 | ZoneList<Expression*>* args = expr->arguments(); |
| 3133 | DCHECK(args->length() == 1); |
| 3134 | |
| 3135 | VisitForAccumulatorValue(args->at(0)); |
| 3136 | |
| 3137 | Label materialize_true, materialize_false; |
| 3138 | Label* if_true = NULL; |
| 3139 | Label* if_false = NULL; |
| 3140 | Label* fall_through = NULL; |
| 3141 | context()->PrepareTest(&materialize_true, &materialize_false, &if_true, |
| 3142 | &if_false, &fall_through); |
| 3143 | |
| 3144 | __ JumpIfSmi(eax, if_false); |
| 3145 | __ CmpObjectType(eax, JS_PROXY_TYPE, ebx); |
| 3146 | PrepareForBailoutBeforeSplit(expr, true, if_true, if_false); |
| 3147 | Split(equal, if_true, if_false, fall_through); |
| 3148 | |
| 3149 | context()->Plug(if_true, if_false); |
| 3150 | } |
| 3151 | |
| 3152 | |
| 3153 | void FullCodeGenerator::EmitObjectEquals(CallRuntime* expr) { |
| 3154 | ZoneList<Expression*>* args = expr->arguments(); |
| 3155 | DCHECK(args->length() == 2); |
| 3156 | |
| 3157 | // Load the two objects into registers and perform the comparison. |
| 3158 | VisitForStackValue(args->at(0)); |
| 3159 | VisitForAccumulatorValue(args->at(1)); |
| 3160 | |
| 3161 | Label materialize_true, materialize_false; |
| 3162 | Label* if_true = NULL; |
| 3163 | Label* if_false = NULL; |
| 3164 | Label* fall_through = NULL; |
| 3165 | context()->PrepareTest(&materialize_true, &materialize_false, |
| 3166 | &if_true, &if_false, &fall_through); |
| 3167 | |
| 3168 | __ pop(ebx); |
| 3169 | __ cmp(eax, ebx); |
| 3170 | PrepareForBailoutBeforeSplit(expr, true, if_true, if_false); |
| 3171 | Split(equal, if_true, if_false, fall_through); |
| 3172 | |
| 3173 | context()->Plug(if_true, if_false); |
| 3174 | } |
| 3175 | |
| 3176 | |
| 3177 | void FullCodeGenerator::EmitArguments(CallRuntime* expr) { |
| 3178 | ZoneList<Expression*>* args = expr->arguments(); |
| 3179 | DCHECK(args->length() == 1); |
| 3180 | |
| 3181 | // ArgumentsAccessStub expects the key in edx and the formal |
| 3182 | // parameter count in eax. |
| 3183 | VisitForAccumulatorValue(args->at(0)); |
| 3184 | __ mov(edx, eax); |
| 3185 | __ Move(eax, Immediate(Smi::FromInt(info_->scope()->num_parameters()))); |
| 3186 | ArgumentsAccessStub stub(isolate(), ArgumentsAccessStub::READ_ELEMENT); |
| 3187 | __ CallStub(&stub); |
| 3188 | context()->Plug(eax); |
| 3189 | } |
| 3190 | |
| 3191 | |
| 3192 | void FullCodeGenerator::EmitArgumentsLength(CallRuntime* expr) { |
| 3193 | DCHECK(expr->arguments()->length() == 0); |
| 3194 | |
| 3195 | Label exit; |
| 3196 | // Get the number of formal parameters. |
| 3197 | __ Move(eax, Immediate(Smi::FromInt(info_->scope()->num_parameters()))); |
| 3198 | |
| 3199 | // Check if the calling frame is an arguments adaptor frame. |
| 3200 | __ mov(ebx, Operand(ebp, StandardFrameConstants::kCallerFPOffset)); |
| 3201 | __ cmp(Operand(ebx, StandardFrameConstants::kContextOffset), |
| 3202 | Immediate(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR))); |
| 3203 | __ j(not_equal, &exit); |
| 3204 | |
| 3205 | // Arguments adaptor case: Read the arguments length from the |
| 3206 | // adaptor frame. |
| 3207 | __ mov(eax, Operand(ebx, ArgumentsAdaptorFrameConstants::kLengthOffset)); |
| 3208 | |
| 3209 | __ bind(&exit); |
| 3210 | __ AssertSmi(eax); |
| 3211 | context()->Plug(eax); |
| 3212 | } |
| 3213 | |
| 3214 | |
| 3215 | void FullCodeGenerator::EmitClassOf(CallRuntime* expr) { |
| 3216 | ZoneList<Expression*>* args = expr->arguments(); |
| 3217 | DCHECK(args->length() == 1); |
| 3218 | Label done, null, function, non_function_constructor; |
| 3219 | |
| 3220 | VisitForAccumulatorValue(args->at(0)); |
| 3221 | |
| 3222 | // If the object is not a JSReceiver, we return null. |
| 3223 | __ JumpIfSmi(eax, &null, Label::kNear); |
| 3224 | STATIC_ASSERT(LAST_JS_RECEIVER_TYPE == LAST_TYPE); |
| 3225 | __ CmpObjectType(eax, FIRST_JS_RECEIVER_TYPE, eax); |
| 3226 | __ j(below, &null, Label::kNear); |
| 3227 | |
| 3228 | // Return 'Function' for JSFunction objects. |
| 3229 | __ CmpInstanceType(eax, JS_FUNCTION_TYPE); |
| 3230 | __ j(equal, &function, Label::kNear); |
| 3231 | |
| 3232 | // Check if the constructor in the map is a JS function. |
| 3233 | __ GetMapConstructor(eax, eax, ebx); |
| 3234 | __ CmpInstanceType(ebx, JS_FUNCTION_TYPE); |
| 3235 | __ j(not_equal, &non_function_constructor, Label::kNear); |
| 3236 | |
| 3237 | // eax now contains the constructor function. Grab the |
| 3238 | // instance class name from there. |
| 3239 | __ mov(eax, FieldOperand(eax, JSFunction::kSharedFunctionInfoOffset)); |
| 3240 | __ mov(eax, FieldOperand(eax, SharedFunctionInfo::kInstanceClassNameOffset)); |
| 3241 | __ jmp(&done, Label::kNear); |
| 3242 | |
| 3243 | // Non-JS objects have class null. |
| 3244 | __ bind(&null); |
| 3245 | __ mov(eax, isolate()->factory()->null_value()); |
| 3246 | __ jmp(&done, Label::kNear); |
| 3247 | |
| 3248 | // Functions have class 'Function'. |
| 3249 | __ bind(&function); |
| 3250 | __ mov(eax, isolate()->factory()->Function_string()); |
| 3251 | __ jmp(&done, Label::kNear); |
| 3252 | |
| 3253 | // Objects with a non-function constructor have class 'Object'. |
| 3254 | __ bind(&non_function_constructor); |
| 3255 | __ mov(eax, isolate()->factory()->Object_string()); |
| 3256 | |
| 3257 | // All done. |
| 3258 | __ bind(&done); |
| 3259 | |
| 3260 | context()->Plug(eax); |
| 3261 | } |
| 3262 | |
| 3263 | |
| 3264 | void FullCodeGenerator::EmitValueOf(CallRuntime* expr) { |
| 3265 | ZoneList<Expression*>* args = expr->arguments(); |
| 3266 | DCHECK(args->length() == 1); |
| 3267 | |
| 3268 | VisitForAccumulatorValue(args->at(0)); // Load the object. |
| 3269 | |
| 3270 | Label done; |
| 3271 | // If the object is a smi return the object. |
| 3272 | __ JumpIfSmi(eax, &done, Label::kNear); |
| 3273 | // If the object is not a value type, return the object. |
| 3274 | __ CmpObjectType(eax, JS_VALUE_TYPE, ebx); |
| 3275 | __ j(not_equal, &done, Label::kNear); |
| 3276 | __ mov(eax, FieldOperand(eax, JSValue::kValueOffset)); |
| 3277 | |
| 3278 | __ bind(&done); |
| 3279 | context()->Plug(eax); |
| 3280 | } |
| 3281 | |
| 3282 | |
| 3283 | void FullCodeGenerator::EmitIsDate(CallRuntime* expr) { |
| 3284 | ZoneList<Expression*>* args = expr->arguments(); |
| 3285 | DCHECK_EQ(1, args->length()); |
| 3286 | |
| 3287 | VisitForAccumulatorValue(args->at(0)); |
| 3288 | |
| 3289 | Label materialize_true, materialize_false; |
| 3290 | Label* if_true = nullptr; |
| 3291 | Label* if_false = nullptr; |
| 3292 | Label* fall_through = nullptr; |
| 3293 | context()->PrepareTest(&materialize_true, &materialize_false, &if_true, |
| 3294 | &if_false, &fall_through); |
| 3295 | |
| 3296 | __ JumpIfSmi(eax, if_false); |
| 3297 | __ CmpObjectType(eax, JS_DATE_TYPE, ebx); |
| 3298 | PrepareForBailoutBeforeSplit(expr, true, if_true, if_false); |
| 3299 | Split(equal, if_true, if_false, fall_through); |
| 3300 | |
| 3301 | context()->Plug(if_true, if_false); |
| 3302 | } |
| 3303 | |
| 3304 | |
| 3305 | void FullCodeGenerator::EmitOneByteSeqStringSetChar(CallRuntime* expr) { |
| 3306 | ZoneList<Expression*>* args = expr->arguments(); |
| 3307 | DCHECK_EQ(3, args->length()); |
| 3308 | |
| 3309 | Register string = eax; |
| 3310 | Register index = ebx; |
| 3311 | Register value = ecx; |
| 3312 | |
| 3313 | VisitForStackValue(args->at(0)); // index |
| 3314 | VisitForStackValue(args->at(1)); // value |
| 3315 | VisitForAccumulatorValue(args->at(2)); // string |
| 3316 | |
| 3317 | __ pop(value); |
| 3318 | __ pop(index); |
| 3319 | |
| 3320 | if (FLAG_debug_code) { |
| 3321 | __ test(value, Immediate(kSmiTagMask)); |
| 3322 | __ Check(zero, kNonSmiValue); |
| 3323 | __ test(index, Immediate(kSmiTagMask)); |
| 3324 | __ Check(zero, kNonSmiValue); |
| 3325 | } |
| 3326 | |
| 3327 | __ SmiUntag(value); |
| 3328 | __ SmiUntag(index); |
| 3329 | |
| 3330 | if (FLAG_debug_code) { |
| 3331 | static const uint32_t one_byte_seq_type = kSeqStringTag | kOneByteStringTag; |
| 3332 | __ EmitSeqStringSetCharCheck(string, index, value, one_byte_seq_type); |
| 3333 | } |
| 3334 | |
| 3335 | __ mov_b(FieldOperand(string, index, times_1, SeqOneByteString::kHeaderSize), |
| 3336 | value); |
| 3337 | context()->Plug(string); |
| 3338 | } |
| 3339 | |
| 3340 | |
| 3341 | void FullCodeGenerator::EmitTwoByteSeqStringSetChar(CallRuntime* expr) { |
| 3342 | ZoneList<Expression*>* args = expr->arguments(); |
| 3343 | DCHECK_EQ(3, args->length()); |
| 3344 | |
| 3345 | Register string = eax; |
| 3346 | Register index = ebx; |
| 3347 | Register value = ecx; |
| 3348 | |
| 3349 | VisitForStackValue(args->at(0)); // index |
| 3350 | VisitForStackValue(args->at(1)); // value |
| 3351 | VisitForAccumulatorValue(args->at(2)); // string |
| 3352 | __ pop(value); |
| 3353 | __ pop(index); |
| 3354 | |
| 3355 | if (FLAG_debug_code) { |
| 3356 | __ test(value, Immediate(kSmiTagMask)); |
| 3357 | __ Check(zero, kNonSmiValue); |
| 3358 | __ test(index, Immediate(kSmiTagMask)); |
| 3359 | __ Check(zero, kNonSmiValue); |
| 3360 | __ SmiUntag(index); |
| 3361 | static const uint32_t two_byte_seq_type = kSeqStringTag | kTwoByteStringTag; |
| 3362 | __ EmitSeqStringSetCharCheck(string, index, value, two_byte_seq_type); |
| 3363 | __ SmiTag(index); |
| 3364 | } |
| 3365 | |
| 3366 | __ SmiUntag(value); |
| 3367 | // No need to untag a smi for two-byte addressing. |
| 3368 | __ mov_w(FieldOperand(string, index, times_1, SeqTwoByteString::kHeaderSize), |
| 3369 | value); |
| 3370 | context()->Plug(string); |
| 3371 | } |
| 3372 | |
| 3373 | |
| 3374 | void FullCodeGenerator::EmitSetValueOf(CallRuntime* expr) { |
| 3375 | ZoneList<Expression*>* args = expr->arguments(); |
| 3376 | DCHECK(args->length() == 2); |
| 3377 | |
| 3378 | VisitForStackValue(args->at(0)); // Load the object. |
| 3379 | VisitForAccumulatorValue(args->at(1)); // Load the value. |
| 3380 | __ pop(ebx); // eax = value. ebx = object. |
| 3381 | |
| 3382 | Label done; |
| 3383 | // If the object is a smi, return the value. |
| 3384 | __ JumpIfSmi(ebx, &done, Label::kNear); |
| 3385 | |
| 3386 | // If the object is not a value type, return the value. |
| 3387 | __ CmpObjectType(ebx, JS_VALUE_TYPE, ecx); |
| 3388 | __ j(not_equal, &done, Label::kNear); |
| 3389 | |
| 3390 | // Store the value. |
| 3391 | __ mov(FieldOperand(ebx, JSValue::kValueOffset), eax); |
| 3392 | |
| 3393 | // Update the write barrier. Save the value as it will be |
| 3394 | // overwritten by the write barrier code and is needed afterward. |
| 3395 | __ mov(edx, eax); |
| 3396 | __ RecordWriteField(ebx, JSValue::kValueOffset, edx, ecx, kDontSaveFPRegs); |
| 3397 | |
| 3398 | __ bind(&done); |
| 3399 | context()->Plug(eax); |
| 3400 | } |
| 3401 | |
| 3402 | |
| 3403 | void FullCodeGenerator::EmitToInteger(CallRuntime* expr) { |
| 3404 | ZoneList<Expression*>* args = expr->arguments(); |
| 3405 | DCHECK_EQ(1, args->length()); |
| 3406 | |
| 3407 | // Load the argument into eax and convert it. |
| 3408 | VisitForAccumulatorValue(args->at(0)); |
| 3409 | |
| 3410 | // Convert the object to an integer. |
| 3411 | Label done_convert; |
| 3412 | __ JumpIfSmi(eax, &done_convert, Label::kNear); |
| 3413 | __ Push(eax); |
| 3414 | __ CallRuntime(Runtime::kToInteger); |
| 3415 | __ bind(&done_convert); |
| 3416 | context()->Plug(eax); |
| 3417 | } |
| 3418 | |
| 3419 | |
| 3420 | void FullCodeGenerator::EmitToName(CallRuntime* expr) { |
| 3421 | ZoneList<Expression*>* args = expr->arguments(); |
| 3422 | DCHECK_EQ(1, args->length()); |
| 3423 | |
| 3424 | // Load the argument into eax and convert it. |
| 3425 | VisitForAccumulatorValue(args->at(0)); |
| 3426 | |
| 3427 | // Convert the object to a name. |
| 3428 | Label convert, done_convert; |
| 3429 | __ JumpIfSmi(eax, &convert, Label::kNear); |
| 3430 | STATIC_ASSERT(FIRST_NAME_TYPE == FIRST_TYPE); |
| 3431 | __ CmpObjectType(eax, LAST_NAME_TYPE, ecx); |
| 3432 | __ j(below_equal, &done_convert, Label::kNear); |
| 3433 | __ bind(&convert); |
| 3434 | __ Push(eax); |
| 3435 | __ CallRuntime(Runtime::kToName); |
| 3436 | __ bind(&done_convert); |
| 3437 | context()->Plug(eax); |
| 3438 | } |
| 3439 | |
| 3440 | |
| 3441 | void FullCodeGenerator::EmitStringCharFromCode(CallRuntime* expr) { |
| 3442 | ZoneList<Expression*>* args = expr->arguments(); |
| 3443 | DCHECK(args->length() == 1); |
| 3444 | |
| 3445 | VisitForAccumulatorValue(args->at(0)); |
| 3446 | |
| 3447 | Label done; |
| 3448 | StringCharFromCodeGenerator generator(eax, ebx); |
| 3449 | generator.GenerateFast(masm_); |
| 3450 | __ jmp(&done); |
| 3451 | |
| 3452 | NopRuntimeCallHelper call_helper; |
| 3453 | generator.GenerateSlow(masm_, call_helper); |
| 3454 | |
| 3455 | __ bind(&done); |
| 3456 | context()->Plug(ebx); |
| 3457 | } |
| 3458 | |
| 3459 | |
| 3460 | void FullCodeGenerator::EmitStringCharCodeAt(CallRuntime* expr) { |
| 3461 | ZoneList<Expression*>* args = expr->arguments(); |
| 3462 | DCHECK(args->length() == 2); |
| 3463 | |
| 3464 | VisitForStackValue(args->at(0)); |
| 3465 | VisitForAccumulatorValue(args->at(1)); |
| 3466 | |
| 3467 | Register object = ebx; |
| 3468 | Register index = eax; |
| 3469 | Register result = edx; |
| 3470 | |
| 3471 | __ pop(object); |
| 3472 | |
| 3473 | Label need_conversion; |
| 3474 | Label index_out_of_range; |
| 3475 | Label done; |
| 3476 | StringCharCodeAtGenerator generator(object, |
| 3477 | index, |
| 3478 | result, |
| 3479 | &need_conversion, |
| 3480 | &need_conversion, |
| 3481 | &index_out_of_range, |
| 3482 | STRING_INDEX_IS_NUMBER); |
| 3483 | generator.GenerateFast(masm_); |
| 3484 | __ jmp(&done); |
| 3485 | |
| 3486 | __ bind(&index_out_of_range); |
| 3487 | // When the index is out of range, the spec requires us to return |
| 3488 | // NaN. |
| 3489 | __ Move(result, Immediate(isolate()->factory()->nan_value())); |
| 3490 | __ jmp(&done); |
| 3491 | |
| 3492 | __ bind(&need_conversion); |
| 3493 | // Move the undefined value into the result register, which will |
| 3494 | // trigger conversion. |
| 3495 | __ Move(result, Immediate(isolate()->factory()->undefined_value())); |
| 3496 | __ jmp(&done); |
| 3497 | |
| 3498 | NopRuntimeCallHelper call_helper; |
| 3499 | generator.GenerateSlow(masm_, NOT_PART_OF_IC_HANDLER, call_helper); |
| 3500 | |
| 3501 | __ bind(&done); |
| 3502 | context()->Plug(result); |
| 3503 | } |
| 3504 | |
| 3505 | |
| 3506 | void FullCodeGenerator::EmitStringCharAt(CallRuntime* expr) { |
| 3507 | ZoneList<Expression*>* args = expr->arguments(); |
| 3508 | DCHECK(args->length() == 2); |
| 3509 | |
| 3510 | VisitForStackValue(args->at(0)); |
| 3511 | VisitForAccumulatorValue(args->at(1)); |
| 3512 | |
| 3513 | Register object = ebx; |
| 3514 | Register index = eax; |
| 3515 | Register scratch = edx; |
| 3516 | Register result = eax; |
| 3517 | |
| 3518 | __ pop(object); |
| 3519 | |
| 3520 | Label need_conversion; |
| 3521 | Label index_out_of_range; |
| 3522 | Label done; |
| 3523 | StringCharAtGenerator generator(object, |
| 3524 | index, |
| 3525 | scratch, |
| 3526 | result, |
| 3527 | &need_conversion, |
| 3528 | &need_conversion, |
| 3529 | &index_out_of_range, |
| 3530 | STRING_INDEX_IS_NUMBER); |
| 3531 | generator.GenerateFast(masm_); |
| 3532 | __ jmp(&done); |
| 3533 | |
| 3534 | __ bind(&index_out_of_range); |
| 3535 | // When the index is out of range, the spec requires us to return |
| 3536 | // the empty string. |
| 3537 | __ Move(result, Immediate(isolate()->factory()->empty_string())); |
| 3538 | __ jmp(&done); |
| 3539 | |
| 3540 | __ bind(&need_conversion); |
| 3541 | // Move smi zero into the result register, which will trigger |
| 3542 | // conversion. |
| 3543 | __ Move(result, Immediate(Smi::FromInt(0))); |
| 3544 | __ jmp(&done); |
| 3545 | |
| 3546 | NopRuntimeCallHelper call_helper; |
| 3547 | generator.GenerateSlow(masm_, NOT_PART_OF_IC_HANDLER, call_helper); |
| 3548 | |
| 3549 | __ bind(&done); |
| 3550 | context()->Plug(result); |
| 3551 | } |
| 3552 | |
| 3553 | |
| 3554 | void FullCodeGenerator::EmitCall(CallRuntime* expr) { |
| 3555 | ZoneList<Expression*>* args = expr->arguments(); |
| 3556 | DCHECK_LE(2, args->length()); |
| 3557 | // Push target, receiver and arguments onto the stack. |
| 3558 | for (Expression* const arg : *args) { |
| 3559 | VisitForStackValue(arg); |
| 3560 | } |
| 3561 | PrepareForBailoutForId(expr->CallId(), NO_REGISTERS); |
| 3562 | // Move target to edi. |
| 3563 | int const argc = args->length() - 2; |
| 3564 | __ mov(edi, Operand(esp, (argc + 1) * kPointerSize)); |
| 3565 | // Call the target. |
| 3566 | __ mov(eax, Immediate(argc)); |
| 3567 | __ Call(isolate()->builtins()->Call(), RelocInfo::CODE_TARGET); |
| 3568 | // Restore context register. |
| 3569 | __ mov(esi, Operand(ebp, StandardFrameConstants::kContextOffset)); |
| 3570 | // Discard the function left on TOS. |
| 3571 | context()->DropAndPlug(1, eax); |
| 3572 | } |
| 3573 | |
| 3574 | |
| 3575 | void FullCodeGenerator::EmitHasCachedArrayIndex(CallRuntime* expr) { |
| 3576 | ZoneList<Expression*>* args = expr->arguments(); |
| 3577 | DCHECK(args->length() == 1); |
| 3578 | |
| 3579 | VisitForAccumulatorValue(args->at(0)); |
| 3580 | |
| 3581 | __ AssertString(eax); |
| 3582 | |
| 3583 | Label materialize_true, materialize_false; |
| 3584 | Label* if_true = NULL; |
| 3585 | Label* if_false = NULL; |
| 3586 | Label* fall_through = NULL; |
| 3587 | context()->PrepareTest(&materialize_true, &materialize_false, |
| 3588 | &if_true, &if_false, &fall_through); |
| 3589 | |
| 3590 | __ test(FieldOperand(eax, String::kHashFieldOffset), |
| 3591 | Immediate(String::kContainsCachedArrayIndexMask)); |
| 3592 | PrepareForBailoutBeforeSplit(expr, true, if_true, if_false); |
| 3593 | Split(zero, if_true, if_false, fall_through); |
| 3594 | |
| 3595 | context()->Plug(if_true, if_false); |
| 3596 | } |
| 3597 | |
| 3598 | |
| 3599 | void FullCodeGenerator::EmitGetCachedArrayIndex(CallRuntime* expr) { |
| 3600 | ZoneList<Expression*>* args = expr->arguments(); |
| 3601 | DCHECK(args->length() == 1); |
| 3602 | VisitForAccumulatorValue(args->at(0)); |
| 3603 | |
| 3604 | __ AssertString(eax); |
| 3605 | |
| 3606 | __ mov(eax, FieldOperand(eax, String::kHashFieldOffset)); |
| 3607 | __ IndexFromHash(eax, eax); |
| 3608 | |
| 3609 | context()->Plug(eax); |
| 3610 | } |
| 3611 | |
| 3612 | |
| 3613 | void FullCodeGenerator::EmitGetSuperConstructor(CallRuntime* expr) { |
| 3614 | ZoneList<Expression*>* args = expr->arguments(); |
| 3615 | DCHECK_EQ(1, args->length()); |
| 3616 | VisitForAccumulatorValue(args->at(0)); |
| 3617 | __ AssertFunction(eax); |
| 3618 | __ mov(eax, FieldOperand(eax, HeapObject::kMapOffset)); |
| 3619 | __ mov(eax, FieldOperand(eax, Map::kPrototypeOffset)); |
| 3620 | context()->Plug(eax); |
| 3621 | } |
| 3622 | |
| 3623 | |
| 3624 | void FullCodeGenerator::EmitFastOneByteArrayJoin(CallRuntime* expr) { |
| 3625 | Label bailout, done, one_char_separator, long_separator, |
| 3626 | non_trivial_array, not_size_one_array, loop, |
| 3627 | loop_1, loop_1_condition, loop_2, loop_2_entry, loop_3, loop_3_entry; |
| 3628 | |
| 3629 | ZoneList<Expression*>* args = expr->arguments(); |
| 3630 | DCHECK(args->length() == 2); |
| 3631 | // We will leave the separator on the stack until the end of the function. |
| 3632 | VisitForStackValue(args->at(1)); |
| 3633 | // Load this to eax (= array) |
| 3634 | VisitForAccumulatorValue(args->at(0)); |
| 3635 | // All aliases of the same register have disjoint lifetimes. |
| 3636 | Register array = eax; |
| 3637 | Register elements = no_reg; // Will be eax. |
| 3638 | |
| 3639 | Register index = edx; |
| 3640 | |
| 3641 | Register string_length = ecx; |
| 3642 | |
| 3643 | Register string = esi; |
| 3644 | |
| 3645 | Register scratch = ebx; |
| 3646 | |
| 3647 | Register array_length = edi; |
| 3648 | Register result_pos = no_reg; // Will be edi. |
| 3649 | |
| 3650 | // Separator operand is already pushed. |
| 3651 | Operand separator_operand = Operand(esp, 2 * kPointerSize); |
| 3652 | Operand result_operand = Operand(esp, 1 * kPointerSize); |
| 3653 | Operand array_length_operand = Operand(esp, 0); |
| 3654 | __ sub(esp, Immediate(2 * kPointerSize)); |
| 3655 | __ cld(); |
| 3656 | // Check that the array is a JSArray |
| 3657 | __ JumpIfSmi(array, &bailout); |
| 3658 | __ CmpObjectType(array, JS_ARRAY_TYPE, scratch); |
| 3659 | __ j(not_equal, &bailout); |
| 3660 | |
| 3661 | // Check that the array has fast elements. |
| 3662 | __ CheckFastElements(scratch, &bailout); |
| 3663 | |
| 3664 | // If the array has length zero, return the empty string. |
| 3665 | __ mov(array_length, FieldOperand(array, JSArray::kLengthOffset)); |
| 3666 | __ SmiUntag(array_length); |
| 3667 | __ j(not_zero, &non_trivial_array); |
| 3668 | __ mov(result_operand, isolate()->factory()->empty_string()); |
| 3669 | __ jmp(&done); |
| 3670 | |
| 3671 | // Save the array length. |
| 3672 | __ bind(&non_trivial_array); |
| 3673 | __ mov(array_length_operand, array_length); |
| 3674 | |
| 3675 | // Save the FixedArray containing array's elements. |
| 3676 | // End of array's live range. |
| 3677 | elements = array; |
| 3678 | __ mov(elements, FieldOperand(array, JSArray::kElementsOffset)); |
| 3679 | array = no_reg; |
| 3680 | |
| 3681 | |
| 3682 | // Check that all array elements are sequential one-byte strings, and |
| 3683 | // accumulate the sum of their lengths, as a smi-encoded value. |
| 3684 | __ Move(index, Immediate(0)); |
| 3685 | __ Move(string_length, Immediate(0)); |
| 3686 | // Loop condition: while (index < length). |
| 3687 | // Live loop registers: index, array_length, string, |
| 3688 | // scratch, string_length, elements. |
| 3689 | if (generate_debug_code_) { |
| 3690 | __ cmp(index, array_length); |
| 3691 | __ Assert(less, kNoEmptyArraysHereInEmitFastOneByteArrayJoin); |
| 3692 | } |
| 3693 | __ bind(&loop); |
| 3694 | __ mov(string, FieldOperand(elements, |
| 3695 | index, |
| 3696 | times_pointer_size, |
| 3697 | FixedArray::kHeaderSize)); |
| 3698 | __ JumpIfSmi(string, &bailout); |
| 3699 | __ mov(scratch, FieldOperand(string, HeapObject::kMapOffset)); |
| 3700 | __ movzx_b(scratch, FieldOperand(scratch, Map::kInstanceTypeOffset)); |
| 3701 | __ and_(scratch, Immediate( |
| 3702 | kIsNotStringMask | kStringEncodingMask | kStringRepresentationMask)); |
| 3703 | __ cmp(scratch, kStringTag | kOneByteStringTag | kSeqStringTag); |
| 3704 | __ j(not_equal, &bailout); |
| 3705 | __ add(string_length, |
| 3706 | FieldOperand(string, SeqOneByteString::kLengthOffset)); |
| 3707 | __ j(overflow, &bailout); |
| 3708 | __ add(index, Immediate(1)); |
| 3709 | __ cmp(index, array_length); |
| 3710 | __ j(less, &loop); |
| 3711 | |
| 3712 | // If array_length is 1, return elements[0], a string. |
| 3713 | __ cmp(array_length, 1); |
| 3714 | __ j(not_equal, ¬_size_one_array); |
| 3715 | __ mov(scratch, FieldOperand(elements, FixedArray::kHeaderSize)); |
| 3716 | __ mov(result_operand, scratch); |
| 3717 | __ jmp(&done); |
| 3718 | |
| 3719 | __ bind(¬_size_one_array); |
| 3720 | |
| 3721 | // End of array_length live range. |
| 3722 | result_pos = array_length; |
| 3723 | array_length = no_reg; |
| 3724 | |
| 3725 | // Live registers: |
| 3726 | // string_length: Sum of string lengths, as a smi. |
| 3727 | // elements: FixedArray of strings. |
| 3728 | |
| 3729 | // Check that the separator is a flat one-byte string. |
| 3730 | __ mov(string, separator_operand); |
| 3731 | __ JumpIfSmi(string, &bailout); |
| 3732 | __ mov(scratch, FieldOperand(string, HeapObject::kMapOffset)); |
| 3733 | __ movzx_b(scratch, FieldOperand(scratch, Map::kInstanceTypeOffset)); |
| 3734 | __ and_(scratch, Immediate( |
| 3735 | kIsNotStringMask | kStringEncodingMask | kStringRepresentationMask)); |
| 3736 | __ cmp(scratch, kStringTag | kOneByteStringTag | kSeqStringTag); |
| 3737 | __ j(not_equal, &bailout); |
| 3738 | |
| 3739 | // Add (separator length times array_length) - separator length |
| 3740 | // to string_length. |
| 3741 | __ mov(scratch, separator_operand); |
| 3742 | __ mov(scratch, FieldOperand(scratch, SeqOneByteString::kLengthOffset)); |
| 3743 | __ sub(string_length, scratch); // May be negative, temporarily. |
| 3744 | __ imul(scratch, array_length_operand); |
| 3745 | __ j(overflow, &bailout); |
| 3746 | __ add(string_length, scratch); |
| 3747 | __ j(overflow, &bailout); |
| 3748 | |
| 3749 | __ shr(string_length, 1); |
| 3750 | |
| 3751 | // Bailout for large object allocations. |
| 3752 | __ cmp(string_length, Page::kMaxRegularHeapObjectSize); |
| 3753 | __ j(greater, &bailout); |
| 3754 | |
| 3755 | // Live registers and stack values: |
| 3756 | // string_length |
| 3757 | // elements |
| 3758 | __ AllocateOneByteString(result_pos, string_length, scratch, index, string, |
| 3759 | &bailout); |
| 3760 | __ mov(result_operand, result_pos); |
| 3761 | __ lea(result_pos, FieldOperand(result_pos, SeqOneByteString::kHeaderSize)); |
| 3762 | |
| 3763 | |
| 3764 | __ mov(string, separator_operand); |
| 3765 | __ cmp(FieldOperand(string, SeqOneByteString::kLengthOffset), |
| 3766 | Immediate(Smi::FromInt(1))); |
| 3767 | __ j(equal, &one_char_separator); |
| 3768 | __ j(greater, &long_separator); |
| 3769 | |
| 3770 | |
| 3771 | // Empty separator case |
| 3772 | __ mov(index, Immediate(0)); |
| 3773 | __ jmp(&loop_1_condition); |
| 3774 | // Loop condition: while (index < length). |
| 3775 | __ bind(&loop_1); |
| 3776 | // Each iteration of the loop concatenates one string to the result. |
| 3777 | // Live values in registers: |
| 3778 | // index: which element of the elements array we are adding to the result. |
| 3779 | // result_pos: the position to which we are currently copying characters. |
| 3780 | // elements: the FixedArray of strings we are joining. |
| 3781 | |
| 3782 | // Get string = array[index]. |
| 3783 | __ mov(string, FieldOperand(elements, index, |
| 3784 | times_pointer_size, |
| 3785 | FixedArray::kHeaderSize)); |
| 3786 | __ mov(string_length, |
| 3787 | FieldOperand(string, String::kLengthOffset)); |
| 3788 | __ shr(string_length, 1); |
| 3789 | __ lea(string, |
| 3790 | FieldOperand(string, SeqOneByteString::kHeaderSize)); |
| 3791 | __ CopyBytes(string, result_pos, string_length, scratch); |
| 3792 | __ add(index, Immediate(1)); |
| 3793 | __ bind(&loop_1_condition); |
| 3794 | __ cmp(index, array_length_operand); |
| 3795 | __ j(less, &loop_1); // End while (index < length). |
| 3796 | __ jmp(&done); |
| 3797 | |
| 3798 | |
| 3799 | |
| 3800 | // One-character separator case |
| 3801 | __ bind(&one_char_separator); |
| 3802 | // Replace separator with its one-byte character value. |
| 3803 | __ mov_b(scratch, FieldOperand(string, SeqOneByteString::kHeaderSize)); |
| 3804 | __ mov_b(separator_operand, scratch); |
| 3805 | |
| 3806 | __ Move(index, Immediate(0)); |
| 3807 | // Jump into the loop after the code that copies the separator, so the first |
| 3808 | // element is not preceded by a separator |
| 3809 | __ jmp(&loop_2_entry); |
| 3810 | // Loop condition: while (index < length). |
| 3811 | __ bind(&loop_2); |
| 3812 | // Each iteration of the loop concatenates one string to the result. |
| 3813 | // Live values in registers: |
| 3814 | // index: which element of the elements array we are adding to the result. |
| 3815 | // result_pos: the position to which we are currently copying characters. |
| 3816 | |
| 3817 | // Copy the separator character to the result. |
| 3818 | __ mov_b(scratch, separator_operand); |
| 3819 | __ mov_b(Operand(result_pos, 0), scratch); |
| 3820 | __ inc(result_pos); |
| 3821 | |
| 3822 | __ bind(&loop_2_entry); |
| 3823 | // Get string = array[index]. |
| 3824 | __ mov(string, FieldOperand(elements, index, |
| 3825 | times_pointer_size, |
| 3826 | FixedArray::kHeaderSize)); |
| 3827 | __ mov(string_length, |
| 3828 | FieldOperand(string, String::kLengthOffset)); |
| 3829 | __ shr(string_length, 1); |
| 3830 | __ lea(string, |
| 3831 | FieldOperand(string, SeqOneByteString::kHeaderSize)); |
| 3832 | __ CopyBytes(string, result_pos, string_length, scratch); |
| 3833 | __ add(index, Immediate(1)); |
| 3834 | |
| 3835 | __ cmp(index, array_length_operand); |
| 3836 | __ j(less, &loop_2); // End while (index < length). |
| 3837 | __ jmp(&done); |
| 3838 | |
| 3839 | |
| 3840 | // Long separator case (separator is more than one character). |
| 3841 | __ bind(&long_separator); |
| 3842 | |
| 3843 | __ Move(index, Immediate(0)); |
| 3844 | // Jump into the loop after the code that copies the separator, so the first |
| 3845 | // element is not preceded by a separator |
| 3846 | __ jmp(&loop_3_entry); |
| 3847 | // Loop condition: while (index < length). |
| 3848 | __ bind(&loop_3); |
| 3849 | // Each iteration of the loop concatenates one string to the result. |
| 3850 | // Live values in registers: |
| 3851 | // index: which element of the elements array we are adding to the result. |
| 3852 | // result_pos: the position to which we are currently copying characters. |
| 3853 | |
| 3854 | // Copy the separator to the result. |
| 3855 | __ mov(string, separator_operand); |
| 3856 | __ mov(string_length, |
| 3857 | FieldOperand(string, String::kLengthOffset)); |
| 3858 | __ shr(string_length, 1); |
| 3859 | __ lea(string, |
| 3860 | FieldOperand(string, SeqOneByteString::kHeaderSize)); |
| 3861 | __ CopyBytes(string, result_pos, string_length, scratch); |
| 3862 | |
| 3863 | __ bind(&loop_3_entry); |
| 3864 | // Get string = array[index]. |
| 3865 | __ mov(string, FieldOperand(elements, index, |
| 3866 | times_pointer_size, |
| 3867 | FixedArray::kHeaderSize)); |
| 3868 | __ mov(string_length, |
| 3869 | FieldOperand(string, String::kLengthOffset)); |
| 3870 | __ shr(string_length, 1); |
| 3871 | __ lea(string, |
| 3872 | FieldOperand(string, SeqOneByteString::kHeaderSize)); |
| 3873 | __ CopyBytes(string, result_pos, string_length, scratch); |
| 3874 | __ add(index, Immediate(1)); |
| 3875 | |
| 3876 | __ cmp(index, array_length_operand); |
| 3877 | __ j(less, &loop_3); // End while (index < length). |
| 3878 | __ jmp(&done); |
| 3879 | |
| 3880 | |
| 3881 | __ bind(&bailout); |
| 3882 | __ mov(result_operand, isolate()->factory()->undefined_value()); |
| 3883 | __ bind(&done); |
| 3884 | __ mov(eax, result_operand); |
| 3885 | // Drop temp values from the stack, and restore context register. |
| 3886 | __ add(esp, Immediate(3 * kPointerSize)); |
| 3887 | |
| 3888 | __ mov(esi, Operand(ebp, StandardFrameConstants::kContextOffset)); |
| 3889 | context()->Plug(eax); |
| 3890 | } |
| 3891 | |
| 3892 | |
| 3893 | void FullCodeGenerator::EmitDebugIsActive(CallRuntime* expr) { |
| 3894 | DCHECK(expr->arguments()->length() == 0); |
| 3895 | ExternalReference debug_is_active = |
| 3896 | ExternalReference::debug_is_active_address(isolate()); |
| 3897 | __ movzx_b(eax, Operand::StaticVariable(debug_is_active)); |
| 3898 | __ SmiTag(eax); |
| 3899 | context()->Plug(eax); |
| 3900 | } |
| 3901 | |
| 3902 | |
| 3903 | void FullCodeGenerator::EmitCreateIterResultObject(CallRuntime* expr) { |
| 3904 | ZoneList<Expression*>* args = expr->arguments(); |
| 3905 | DCHECK_EQ(2, args->length()); |
| 3906 | VisitForStackValue(args->at(0)); |
| 3907 | VisitForStackValue(args->at(1)); |
| 3908 | |
| 3909 | Label runtime, done; |
| 3910 | |
| 3911 | __ Allocate(JSIteratorResult::kSize, eax, ecx, edx, &runtime, TAG_OBJECT); |
| 3912 | __ mov(ebx, NativeContextOperand()); |
| 3913 | __ mov(ebx, ContextOperand(ebx, Context::ITERATOR_RESULT_MAP_INDEX)); |
| 3914 | __ mov(FieldOperand(eax, HeapObject::kMapOffset), ebx); |
| 3915 | __ mov(FieldOperand(eax, JSObject::kPropertiesOffset), |
| 3916 | isolate()->factory()->empty_fixed_array()); |
| 3917 | __ mov(FieldOperand(eax, JSObject::kElementsOffset), |
| 3918 | isolate()->factory()->empty_fixed_array()); |
| 3919 | __ pop(FieldOperand(eax, JSIteratorResult::kDoneOffset)); |
| 3920 | __ pop(FieldOperand(eax, JSIteratorResult::kValueOffset)); |
| 3921 | STATIC_ASSERT(JSIteratorResult::kSize == 5 * kPointerSize); |
| 3922 | __ jmp(&done, Label::kNear); |
| 3923 | |
| 3924 | __ bind(&runtime); |
| 3925 | __ CallRuntime(Runtime::kCreateIterResultObject); |
| 3926 | |
| 3927 | __ bind(&done); |
| 3928 | context()->Plug(eax); |
| 3929 | } |
| 3930 | |
| 3931 | |
| 3932 | void FullCodeGenerator::EmitLoadJSRuntimeFunction(CallRuntime* expr) { |
| 3933 | // Push undefined as receiver. |
| 3934 | __ push(Immediate(isolate()->factory()->undefined_value())); |
| 3935 | |
| 3936 | __ LoadGlobalFunction(expr->context_index(), eax); |
| 3937 | } |
| 3938 | |
| 3939 | |
| 3940 | void FullCodeGenerator::EmitCallJSRuntimeFunction(CallRuntime* expr) { |
| 3941 | ZoneList<Expression*>* args = expr->arguments(); |
| 3942 | int arg_count = args->length(); |
| 3943 | |
| 3944 | SetCallPosition(expr); |
| 3945 | __ mov(edi, Operand(esp, (arg_count + 1) * kPointerSize)); |
| 3946 | __ Set(eax, arg_count); |
| 3947 | __ Call(isolate()->builtins()->Call(ConvertReceiverMode::kNullOrUndefined), |
| 3948 | RelocInfo::CODE_TARGET); |
| 3949 | } |
| 3950 | |
| 3951 | |
| 3952 | void FullCodeGenerator::VisitCallRuntime(CallRuntime* expr) { |
| 3953 | ZoneList<Expression*>* args = expr->arguments(); |
| 3954 | int arg_count = args->length(); |
| 3955 | |
| 3956 | if (expr->is_jsruntime()) { |
| 3957 | Comment cmnt(masm_, "[ CallRuntime"); |
| 3958 | EmitLoadJSRuntimeFunction(expr); |
| 3959 | |
| 3960 | // Push the target function under the receiver. |
| 3961 | __ push(Operand(esp, 0)); |
| 3962 | __ mov(Operand(esp, kPointerSize), eax); |
| 3963 | |
| 3964 | // Push the arguments ("left-to-right"). |
| 3965 | for (int i = 0; i < arg_count; i++) { |
| 3966 | VisitForStackValue(args->at(i)); |
| 3967 | } |
| 3968 | |
| 3969 | PrepareForBailoutForId(expr->CallId(), NO_REGISTERS); |
| 3970 | EmitCallJSRuntimeFunction(expr); |
| 3971 | |
| 3972 | // Restore context register. |
| 3973 | __ mov(esi, Operand(ebp, StandardFrameConstants::kContextOffset)); |
| 3974 | context()->DropAndPlug(1, eax); |
| 3975 | |
| 3976 | } else { |
| 3977 | const Runtime::Function* function = expr->function(); |
| 3978 | switch (function->function_id) { |
| 3979 | #define CALL_INTRINSIC_GENERATOR(Name) \ |
| 3980 | case Runtime::kInline##Name: { \ |
| 3981 | Comment cmnt(masm_, "[ Inline" #Name); \ |
| 3982 | return Emit##Name(expr); \ |
| 3983 | } |
| 3984 | FOR_EACH_FULL_CODE_INTRINSIC(CALL_INTRINSIC_GENERATOR) |
| 3985 | #undef CALL_INTRINSIC_GENERATOR |
| 3986 | default: { |
| 3987 | Comment cmnt(masm_, "[ CallRuntime for unhandled intrinsic"); |
| 3988 | // Push the arguments ("left-to-right"). |
| 3989 | for (int i = 0; i < arg_count; i++) { |
| 3990 | VisitForStackValue(args->at(i)); |
| 3991 | } |
| 3992 | |
| 3993 | // Call the C runtime function. |
| 3994 | PrepareForBailoutForId(expr->CallId(), NO_REGISTERS); |
| 3995 | __ CallRuntime(expr->function(), arg_count); |
| 3996 | context()->Plug(eax); |
| 3997 | } |
| 3998 | } |
| 3999 | } |
| 4000 | } |
| 4001 | |
| 4002 | |
| 4003 | void FullCodeGenerator::VisitUnaryOperation(UnaryOperation* expr) { |
| 4004 | switch (expr->op()) { |
| 4005 | case Token::DELETE: { |
| 4006 | Comment cmnt(masm_, "[ UnaryOperation (DELETE)"); |
| 4007 | Property* property = expr->expression()->AsProperty(); |
| 4008 | VariableProxy* proxy = expr->expression()->AsVariableProxy(); |
| 4009 | |
| 4010 | if (property != NULL) { |
| 4011 | VisitForStackValue(property->obj()); |
| 4012 | VisitForStackValue(property->key()); |
| 4013 | __ CallRuntime(is_strict(language_mode()) |
| 4014 | ? Runtime::kDeleteProperty_Strict |
| 4015 | : Runtime::kDeleteProperty_Sloppy); |
| 4016 | context()->Plug(eax); |
| 4017 | } else if (proxy != NULL) { |
| 4018 | Variable* var = proxy->var(); |
| 4019 | // Delete of an unqualified identifier is disallowed in strict mode but |
| 4020 | // "delete this" is allowed. |
| 4021 | bool is_this = var->HasThisName(isolate()); |
| 4022 | DCHECK(is_sloppy(language_mode()) || is_this); |
| 4023 | if (var->IsUnallocatedOrGlobalSlot()) { |
| 4024 | __ mov(eax, NativeContextOperand()); |
| 4025 | __ push(ContextOperand(eax, Context::EXTENSION_INDEX)); |
| 4026 | __ push(Immediate(var->name())); |
| 4027 | __ CallRuntime(Runtime::kDeleteProperty_Sloppy); |
| 4028 | context()->Plug(eax); |
| 4029 | } else if (var->IsStackAllocated() || var->IsContextSlot()) { |
| 4030 | // Result of deleting non-global variables is false. 'this' is |
| 4031 | // not really a variable, though we implement it as one. The |
| 4032 | // subexpression does not have side effects. |
| 4033 | context()->Plug(is_this); |
| 4034 | } else { |
| 4035 | // Non-global variable. Call the runtime to try to delete from the |
| 4036 | // context where the variable was introduced. |
| 4037 | __ push(context_register()); |
| 4038 | __ push(Immediate(var->name())); |
| 4039 | __ CallRuntime(Runtime::kDeleteLookupSlot); |
| 4040 | context()->Plug(eax); |
| 4041 | } |
| 4042 | } else { |
| 4043 | // Result of deleting non-property, non-variable reference is true. |
| 4044 | // The subexpression may have side effects. |
| 4045 | VisitForEffect(expr->expression()); |
| 4046 | context()->Plug(true); |
| 4047 | } |
| 4048 | break; |
| 4049 | } |
| 4050 | |
| 4051 | case Token::VOID: { |
| 4052 | Comment cmnt(masm_, "[ UnaryOperation (VOID)"); |
| 4053 | VisitForEffect(expr->expression()); |
| 4054 | context()->Plug(isolate()->factory()->undefined_value()); |
| 4055 | break; |
| 4056 | } |
| 4057 | |
| 4058 | case Token::NOT: { |
| 4059 | Comment cmnt(masm_, "[ UnaryOperation (NOT)"); |
| 4060 | if (context()->IsEffect()) { |
| 4061 | // Unary NOT has no side effects so it's only necessary to visit the |
| 4062 | // subexpression. Match the optimizing compiler by not branching. |
| 4063 | VisitForEffect(expr->expression()); |
| 4064 | } else if (context()->IsTest()) { |
| 4065 | const TestContext* test = TestContext::cast(context()); |
| 4066 | // The labels are swapped for the recursive call. |
| 4067 | VisitForControl(expr->expression(), |
| 4068 | test->false_label(), |
| 4069 | test->true_label(), |
| 4070 | test->fall_through()); |
| 4071 | context()->Plug(test->true_label(), test->false_label()); |
| 4072 | } else { |
| 4073 | // We handle value contexts explicitly rather than simply visiting |
| 4074 | // for control and plugging the control flow into the context, |
| 4075 | // because we need to prepare a pair of extra administrative AST ids |
| 4076 | // for the optimizing compiler. |
| 4077 | DCHECK(context()->IsAccumulatorValue() || context()->IsStackValue()); |
| 4078 | Label materialize_true, materialize_false, done; |
| 4079 | VisitForControl(expr->expression(), |
| 4080 | &materialize_false, |
| 4081 | &materialize_true, |
| 4082 | &materialize_true); |
| 4083 | __ bind(&materialize_true); |
| 4084 | PrepareForBailoutForId(expr->MaterializeTrueId(), NO_REGISTERS); |
| 4085 | if (context()->IsAccumulatorValue()) { |
| 4086 | __ mov(eax, isolate()->factory()->true_value()); |
| 4087 | } else { |
| 4088 | __ Push(isolate()->factory()->true_value()); |
| 4089 | } |
| 4090 | __ jmp(&done, Label::kNear); |
| 4091 | __ bind(&materialize_false); |
| 4092 | PrepareForBailoutForId(expr->MaterializeFalseId(), NO_REGISTERS); |
| 4093 | if (context()->IsAccumulatorValue()) { |
| 4094 | __ mov(eax, isolate()->factory()->false_value()); |
| 4095 | } else { |
| 4096 | __ Push(isolate()->factory()->false_value()); |
| 4097 | } |
| 4098 | __ bind(&done); |
| 4099 | } |
| 4100 | break; |
| 4101 | } |
| 4102 | |
| 4103 | case Token::TYPEOF: { |
| 4104 | Comment cmnt(masm_, "[ UnaryOperation (TYPEOF)"); |
| 4105 | { |
| 4106 | AccumulatorValueContext context(this); |
| 4107 | VisitForTypeofValue(expr->expression()); |
| 4108 | } |
| 4109 | __ mov(ebx, eax); |
| 4110 | TypeofStub typeof_stub(isolate()); |
| 4111 | __ CallStub(&typeof_stub); |
| 4112 | context()->Plug(eax); |
| 4113 | break; |
| 4114 | } |
| 4115 | |
| 4116 | default: |
| 4117 | UNREACHABLE(); |
| 4118 | } |
| 4119 | } |
| 4120 | |
| 4121 | |
| 4122 | void FullCodeGenerator::VisitCountOperation(CountOperation* expr) { |
| 4123 | DCHECK(expr->expression()->IsValidReferenceExpressionOrThis()); |
| 4124 | |
| 4125 | Comment cmnt(masm_, "[ CountOperation"); |
| 4126 | |
| 4127 | Property* prop = expr->expression()->AsProperty(); |
| 4128 | LhsKind assign_type = Property::GetAssignType(prop); |
| 4129 | |
| 4130 | // Evaluate expression and get value. |
| 4131 | if (assign_type == VARIABLE) { |
| 4132 | DCHECK(expr->expression()->AsVariableProxy()->var() != NULL); |
| 4133 | AccumulatorValueContext context(this); |
| 4134 | EmitVariableLoad(expr->expression()->AsVariableProxy()); |
| 4135 | } else { |
| 4136 | // Reserve space for result of postfix operation. |
| 4137 | if (expr->is_postfix() && !context()->IsEffect()) { |
| 4138 | __ push(Immediate(Smi::FromInt(0))); |
| 4139 | } |
| 4140 | switch (assign_type) { |
| 4141 | case NAMED_PROPERTY: { |
| 4142 | // Put the object both on the stack and in the register. |
| 4143 | VisitForStackValue(prop->obj()); |
| 4144 | __ mov(LoadDescriptor::ReceiverRegister(), Operand(esp, 0)); |
| 4145 | EmitNamedPropertyLoad(prop); |
| 4146 | break; |
| 4147 | } |
| 4148 | |
| 4149 | case NAMED_SUPER_PROPERTY: { |
| 4150 | VisitForStackValue(prop->obj()->AsSuperPropertyReference()->this_var()); |
| 4151 | VisitForAccumulatorValue( |
| 4152 | prop->obj()->AsSuperPropertyReference()->home_object()); |
| 4153 | __ push(result_register()); |
| 4154 | __ push(MemOperand(esp, kPointerSize)); |
| 4155 | __ push(result_register()); |
| 4156 | EmitNamedSuperPropertyLoad(prop); |
| 4157 | break; |
| 4158 | } |
| 4159 | |
| 4160 | case KEYED_SUPER_PROPERTY: { |
| 4161 | VisitForStackValue(prop->obj()->AsSuperPropertyReference()->this_var()); |
| 4162 | VisitForStackValue( |
| 4163 | prop->obj()->AsSuperPropertyReference()->home_object()); |
| 4164 | VisitForAccumulatorValue(prop->key()); |
| 4165 | __ push(result_register()); |
| 4166 | __ push(MemOperand(esp, 2 * kPointerSize)); |
| 4167 | __ push(MemOperand(esp, 2 * kPointerSize)); |
| 4168 | __ push(result_register()); |
| 4169 | EmitKeyedSuperPropertyLoad(prop); |
| 4170 | break; |
| 4171 | } |
| 4172 | |
| 4173 | case KEYED_PROPERTY: { |
| 4174 | VisitForStackValue(prop->obj()); |
| 4175 | VisitForStackValue(prop->key()); |
| 4176 | __ mov(LoadDescriptor::ReceiverRegister(), |
| 4177 | Operand(esp, kPointerSize)); // Object. |
| 4178 | __ mov(LoadDescriptor::NameRegister(), Operand(esp, 0)); // Key. |
| 4179 | EmitKeyedPropertyLoad(prop); |
| 4180 | break; |
| 4181 | } |
| 4182 | |
| 4183 | case VARIABLE: |
| 4184 | UNREACHABLE(); |
| 4185 | } |
| 4186 | } |
| 4187 | |
| 4188 | // We need a second deoptimization point after loading the value |
| 4189 | // in case evaluating the property load my have a side effect. |
| 4190 | if (assign_type == VARIABLE) { |
| 4191 | PrepareForBailout(expr->expression(), TOS_REG); |
| 4192 | } else { |
| 4193 | PrepareForBailoutForId(prop->LoadId(), TOS_REG); |
| 4194 | } |
| 4195 | |
| 4196 | // Inline smi case if we are in a loop. |
| 4197 | Label done, stub_call; |
| 4198 | JumpPatchSite patch_site(masm_); |
| 4199 | if (ShouldInlineSmiCase(expr->op())) { |
| 4200 | Label slow; |
| 4201 | patch_site.EmitJumpIfNotSmi(eax, &slow, Label::kNear); |
| 4202 | |
| 4203 | // Save result for postfix expressions. |
| 4204 | if (expr->is_postfix()) { |
| 4205 | if (!context()->IsEffect()) { |
| 4206 | // Save the result on the stack. If we have a named or keyed property |
| 4207 | // we store the result under the receiver that is currently on top |
| 4208 | // of the stack. |
| 4209 | switch (assign_type) { |
| 4210 | case VARIABLE: |
| 4211 | __ push(eax); |
| 4212 | break; |
| 4213 | case NAMED_PROPERTY: |
| 4214 | __ mov(Operand(esp, kPointerSize), eax); |
| 4215 | break; |
| 4216 | case NAMED_SUPER_PROPERTY: |
| 4217 | __ mov(Operand(esp, 2 * kPointerSize), eax); |
| 4218 | break; |
| 4219 | case KEYED_PROPERTY: |
| 4220 | __ mov(Operand(esp, 2 * kPointerSize), eax); |
| 4221 | break; |
| 4222 | case KEYED_SUPER_PROPERTY: |
| 4223 | __ mov(Operand(esp, 3 * kPointerSize), eax); |
| 4224 | break; |
| 4225 | } |
| 4226 | } |
| 4227 | } |
| 4228 | |
| 4229 | if (expr->op() == Token::INC) { |
| 4230 | __ add(eax, Immediate(Smi::FromInt(1))); |
| 4231 | } else { |
| 4232 | __ sub(eax, Immediate(Smi::FromInt(1))); |
| 4233 | } |
| 4234 | __ j(no_overflow, &done, Label::kNear); |
| 4235 | // Call stub. Undo operation first. |
| 4236 | if (expr->op() == Token::INC) { |
| 4237 | __ sub(eax, Immediate(Smi::FromInt(1))); |
| 4238 | } else { |
| 4239 | __ add(eax, Immediate(Smi::FromInt(1))); |
| 4240 | } |
| 4241 | __ jmp(&stub_call, Label::kNear); |
| 4242 | __ bind(&slow); |
| 4243 | } |
| 4244 | if (!is_strong(language_mode())) { |
| 4245 | ToNumberStub convert_stub(isolate()); |
| 4246 | __ CallStub(&convert_stub); |
| 4247 | PrepareForBailoutForId(expr->ToNumberId(), TOS_REG); |
| 4248 | } |
| 4249 | |
| 4250 | // Save result for postfix expressions. |
| 4251 | if (expr->is_postfix()) { |
| 4252 | if (!context()->IsEffect()) { |
| 4253 | // Save the result on the stack. If we have a named or keyed property |
| 4254 | // we store the result under the receiver that is currently on top |
| 4255 | // of the stack. |
| 4256 | switch (assign_type) { |
| 4257 | case VARIABLE: |
| 4258 | __ push(eax); |
| 4259 | break; |
| 4260 | case NAMED_PROPERTY: |
| 4261 | __ mov(Operand(esp, kPointerSize), eax); |
| 4262 | break; |
| 4263 | case NAMED_SUPER_PROPERTY: |
| 4264 | __ mov(Operand(esp, 2 * kPointerSize), eax); |
| 4265 | break; |
| 4266 | case KEYED_PROPERTY: |
| 4267 | __ mov(Operand(esp, 2 * kPointerSize), eax); |
| 4268 | break; |
| 4269 | case KEYED_SUPER_PROPERTY: |
| 4270 | __ mov(Operand(esp, 3 * kPointerSize), eax); |
| 4271 | break; |
| 4272 | } |
| 4273 | } |
| 4274 | } |
| 4275 | |
| 4276 | SetExpressionPosition(expr); |
| 4277 | |
| 4278 | // Call stub for +1/-1. |
| 4279 | __ bind(&stub_call); |
| 4280 | __ mov(edx, eax); |
| 4281 | __ mov(eax, Immediate(Smi::FromInt(1))); |
| 4282 | Handle<Code> code = CodeFactory::BinaryOpIC(isolate(), expr->binary_op(), |
| 4283 | strength(language_mode())).code(); |
| 4284 | CallIC(code, expr->CountBinOpFeedbackId()); |
| 4285 | patch_site.EmitPatchInfo(); |
| 4286 | __ bind(&done); |
| 4287 | |
| 4288 | if (is_strong(language_mode())) { |
| 4289 | PrepareForBailoutForId(expr->ToNumberId(), TOS_REG); |
| 4290 | } |
| 4291 | // Store the value returned in eax. |
| 4292 | switch (assign_type) { |
| 4293 | case VARIABLE: |
| 4294 | if (expr->is_postfix()) { |
| 4295 | // Perform the assignment as if via '='. |
| 4296 | { EffectContext context(this); |
| 4297 | EmitVariableAssignment(expr->expression()->AsVariableProxy()->var(), |
| 4298 | Token::ASSIGN, expr->CountSlot()); |
| 4299 | PrepareForBailoutForId(expr->AssignmentId(), TOS_REG); |
| 4300 | context.Plug(eax); |
| 4301 | } |
| 4302 | // For all contexts except EffectContext We have the result on |
| 4303 | // top of the stack. |
| 4304 | if (!context()->IsEffect()) { |
| 4305 | context()->PlugTOS(); |
| 4306 | } |
| 4307 | } else { |
| 4308 | // Perform the assignment as if via '='. |
| 4309 | EmitVariableAssignment(expr->expression()->AsVariableProxy()->var(), |
| 4310 | Token::ASSIGN, expr->CountSlot()); |
| 4311 | PrepareForBailoutForId(expr->AssignmentId(), TOS_REG); |
| 4312 | context()->Plug(eax); |
| 4313 | } |
| 4314 | break; |
| 4315 | case NAMED_PROPERTY: { |
| 4316 | __ mov(StoreDescriptor::NameRegister(), |
| 4317 | prop->key()->AsLiteral()->value()); |
| 4318 | __ pop(StoreDescriptor::ReceiverRegister()); |
| 4319 | EmitLoadStoreICSlot(expr->CountSlot()); |
| 4320 | CallStoreIC(); |
| 4321 | PrepareForBailoutForId(expr->AssignmentId(), TOS_REG); |
| 4322 | if (expr->is_postfix()) { |
| 4323 | if (!context()->IsEffect()) { |
| 4324 | context()->PlugTOS(); |
| 4325 | } |
| 4326 | } else { |
| 4327 | context()->Plug(eax); |
| 4328 | } |
| 4329 | break; |
| 4330 | } |
| 4331 | case NAMED_SUPER_PROPERTY: { |
| 4332 | EmitNamedSuperPropertyStore(prop); |
| 4333 | if (expr->is_postfix()) { |
| 4334 | if (!context()->IsEffect()) { |
| 4335 | context()->PlugTOS(); |
| 4336 | } |
| 4337 | } else { |
| 4338 | context()->Plug(eax); |
| 4339 | } |
| 4340 | break; |
| 4341 | } |
| 4342 | case KEYED_SUPER_PROPERTY: { |
| 4343 | EmitKeyedSuperPropertyStore(prop); |
| 4344 | if (expr->is_postfix()) { |
| 4345 | if (!context()->IsEffect()) { |
| 4346 | context()->PlugTOS(); |
| 4347 | } |
| 4348 | } else { |
| 4349 | context()->Plug(eax); |
| 4350 | } |
| 4351 | break; |
| 4352 | } |
| 4353 | case KEYED_PROPERTY: { |
| 4354 | __ pop(StoreDescriptor::NameRegister()); |
| 4355 | __ pop(StoreDescriptor::ReceiverRegister()); |
| 4356 | Handle<Code> ic = |
| 4357 | CodeFactory::KeyedStoreIC(isolate(), language_mode()).code(); |
| 4358 | EmitLoadStoreICSlot(expr->CountSlot()); |
| 4359 | CallIC(ic); |
| 4360 | PrepareForBailoutForId(expr->AssignmentId(), TOS_REG); |
| 4361 | if (expr->is_postfix()) { |
| 4362 | // Result is on the stack |
| 4363 | if (!context()->IsEffect()) { |
| 4364 | context()->PlugTOS(); |
| 4365 | } |
| 4366 | } else { |
| 4367 | context()->Plug(eax); |
| 4368 | } |
| 4369 | break; |
| 4370 | } |
| 4371 | } |
| 4372 | } |
| 4373 | |
| 4374 | |
| 4375 | void FullCodeGenerator::EmitLiteralCompareTypeof(Expression* expr, |
| 4376 | Expression* sub_expr, |
| 4377 | Handle<String> check) { |
| 4378 | Label materialize_true, materialize_false; |
| 4379 | Label* if_true = NULL; |
| 4380 | Label* if_false = NULL; |
| 4381 | Label* fall_through = NULL; |
| 4382 | context()->PrepareTest(&materialize_true, &materialize_false, |
| 4383 | &if_true, &if_false, &fall_through); |
| 4384 | |
| 4385 | { AccumulatorValueContext context(this); |
| 4386 | VisitForTypeofValue(sub_expr); |
| 4387 | } |
| 4388 | PrepareForBailoutBeforeSplit(expr, true, if_true, if_false); |
| 4389 | |
| 4390 | Factory* factory = isolate()->factory(); |
| 4391 | if (String::Equals(check, factory->number_string())) { |
| 4392 | __ JumpIfSmi(eax, if_true); |
| 4393 | __ cmp(FieldOperand(eax, HeapObject::kMapOffset), |
| 4394 | isolate()->factory()->heap_number_map()); |
| 4395 | Split(equal, if_true, if_false, fall_through); |
| 4396 | } else if (String::Equals(check, factory->string_string())) { |
| 4397 | __ JumpIfSmi(eax, if_false); |
| 4398 | __ CmpObjectType(eax, FIRST_NONSTRING_TYPE, edx); |
| 4399 | Split(below, if_true, if_false, fall_through); |
| 4400 | } else if (String::Equals(check, factory->symbol_string())) { |
| 4401 | __ JumpIfSmi(eax, if_false); |
| 4402 | __ CmpObjectType(eax, SYMBOL_TYPE, edx); |
| 4403 | Split(equal, if_true, if_false, fall_through); |
| 4404 | } else if (String::Equals(check, factory->boolean_string())) { |
| 4405 | __ cmp(eax, isolate()->factory()->true_value()); |
| 4406 | __ j(equal, if_true); |
| 4407 | __ cmp(eax, isolate()->factory()->false_value()); |
| 4408 | Split(equal, if_true, if_false, fall_through); |
| 4409 | } else if (String::Equals(check, factory->undefined_string())) { |
| 4410 | __ cmp(eax, isolate()->factory()->undefined_value()); |
| 4411 | __ j(equal, if_true); |
| 4412 | __ JumpIfSmi(eax, if_false); |
| 4413 | // Check for undetectable objects => true. |
| 4414 | __ mov(edx, FieldOperand(eax, HeapObject::kMapOffset)); |
| 4415 | __ test_b(FieldOperand(edx, Map::kBitFieldOffset), |
| 4416 | 1 << Map::kIsUndetectable); |
| 4417 | Split(not_zero, if_true, if_false, fall_through); |
| 4418 | } else if (String::Equals(check, factory->function_string())) { |
| 4419 | __ JumpIfSmi(eax, if_false); |
| 4420 | // Check for callable and not undetectable objects => true. |
| 4421 | __ mov(edx, FieldOperand(eax, HeapObject::kMapOffset)); |
| 4422 | __ movzx_b(ecx, FieldOperand(edx, Map::kBitFieldOffset)); |
| 4423 | __ and_(ecx, (1 << Map::kIsCallable) | (1 << Map::kIsUndetectable)); |
| 4424 | __ cmp(ecx, 1 << Map::kIsCallable); |
| 4425 | Split(equal, if_true, if_false, fall_through); |
| 4426 | } else if (String::Equals(check, factory->object_string())) { |
| 4427 | __ JumpIfSmi(eax, if_false); |
| 4428 | __ cmp(eax, isolate()->factory()->null_value()); |
| 4429 | __ j(equal, if_true); |
| 4430 | STATIC_ASSERT(LAST_JS_RECEIVER_TYPE == LAST_TYPE); |
| 4431 | __ CmpObjectType(eax, FIRST_JS_RECEIVER_TYPE, edx); |
| 4432 | __ j(below, if_false); |
| 4433 | // Check for callable or undetectable objects => false. |
| 4434 | __ test_b(FieldOperand(edx, Map::kBitFieldOffset), |
| 4435 | (1 << Map::kIsCallable) | (1 << Map::kIsUndetectable)); |
| 4436 | Split(zero, if_true, if_false, fall_through); |
| 4437 | // clang-format off |
| 4438 | #define SIMD128_TYPE(TYPE, Type, type, lane_count, lane_type) \ |
| 4439 | } else if (String::Equals(check, factory->type##_string())) { \ |
| 4440 | __ JumpIfSmi(eax, if_false); \ |
| 4441 | __ cmp(FieldOperand(eax, HeapObject::kMapOffset), \ |
| 4442 | isolate()->factory()->type##_map()); \ |
| 4443 | Split(equal, if_true, if_false, fall_through); |
| 4444 | SIMD128_TYPES(SIMD128_TYPE) |
| 4445 | #undef SIMD128_TYPE |
| 4446 | // clang-format on |
| 4447 | } else { |
| 4448 | if (if_false != fall_through) __ jmp(if_false); |
| 4449 | } |
| 4450 | context()->Plug(if_true, if_false); |
| 4451 | } |
| 4452 | |
| 4453 | |
| 4454 | void FullCodeGenerator::VisitCompareOperation(CompareOperation* expr) { |
| 4455 | Comment cmnt(masm_, "[ CompareOperation"); |
| 4456 | SetExpressionPosition(expr); |
| 4457 | |
| 4458 | // First we try a fast inlined version of the compare when one of |
| 4459 | // the operands is a literal. |
| 4460 | if (TryLiteralCompare(expr)) return; |
| 4461 | |
| 4462 | // Always perform the comparison for its control flow. Pack the result |
| 4463 | // into the expression's context after the comparison is performed. |
| 4464 | Label materialize_true, materialize_false; |
| 4465 | Label* if_true = NULL; |
| 4466 | Label* if_false = NULL; |
| 4467 | Label* fall_through = NULL; |
| 4468 | context()->PrepareTest(&materialize_true, &materialize_false, |
| 4469 | &if_true, &if_false, &fall_through); |
| 4470 | |
| 4471 | Token::Value op = expr->op(); |
| 4472 | VisitForStackValue(expr->left()); |
| 4473 | switch (op) { |
| 4474 | case Token::IN: |
| 4475 | VisitForStackValue(expr->right()); |
| 4476 | __ CallRuntime(Runtime::kHasProperty); |
| 4477 | PrepareForBailoutBeforeSplit(expr, false, NULL, NULL); |
| 4478 | __ cmp(eax, isolate()->factory()->true_value()); |
| 4479 | Split(equal, if_true, if_false, fall_through); |
| 4480 | break; |
| 4481 | |
| 4482 | case Token::INSTANCEOF: { |
| 4483 | VisitForAccumulatorValue(expr->right()); |
| 4484 | __ Pop(edx); |
| 4485 | InstanceOfStub stub(isolate()); |
| 4486 | __ CallStub(&stub); |
| 4487 | PrepareForBailoutBeforeSplit(expr, false, NULL, NULL); |
| 4488 | __ cmp(eax, isolate()->factory()->true_value()); |
| 4489 | Split(equal, if_true, if_false, fall_through); |
| 4490 | break; |
| 4491 | } |
| 4492 | |
| 4493 | default: { |
| 4494 | VisitForAccumulatorValue(expr->right()); |
| 4495 | Condition cc = CompareIC::ComputeCondition(op); |
| 4496 | __ pop(edx); |
| 4497 | |
| 4498 | bool inline_smi_code = ShouldInlineSmiCase(op); |
| 4499 | JumpPatchSite patch_site(masm_); |
| 4500 | if (inline_smi_code) { |
| 4501 | Label slow_case; |
| 4502 | __ mov(ecx, edx); |
| 4503 | __ or_(ecx, eax); |
| 4504 | patch_site.EmitJumpIfNotSmi(ecx, &slow_case, Label::kNear); |
| 4505 | __ cmp(edx, eax); |
| 4506 | Split(cc, if_true, if_false, NULL); |
| 4507 | __ bind(&slow_case); |
| 4508 | } |
| 4509 | |
| 4510 | Handle<Code> ic = CodeFactory::CompareIC( |
| 4511 | isolate(), op, strength(language_mode())).code(); |
| 4512 | CallIC(ic, expr->CompareOperationFeedbackId()); |
| 4513 | patch_site.EmitPatchInfo(); |
| 4514 | |
| 4515 | PrepareForBailoutBeforeSplit(expr, true, if_true, if_false); |
| 4516 | __ test(eax, eax); |
| 4517 | Split(cc, if_true, if_false, fall_through); |
| 4518 | } |
| 4519 | } |
| 4520 | |
| 4521 | // Convert the result of the comparison into one expected for this |
| 4522 | // expression's context. |
| 4523 | context()->Plug(if_true, if_false); |
| 4524 | } |
| 4525 | |
| 4526 | |
| 4527 | void FullCodeGenerator::EmitLiteralCompareNil(CompareOperation* expr, |
| 4528 | Expression* sub_expr, |
| 4529 | NilValue nil) { |
| 4530 | Label materialize_true, materialize_false; |
| 4531 | Label* if_true = NULL; |
| 4532 | Label* if_false = NULL; |
| 4533 | Label* fall_through = NULL; |
| 4534 | context()->PrepareTest(&materialize_true, &materialize_false, |
| 4535 | &if_true, &if_false, &fall_through); |
| 4536 | |
| 4537 | VisitForAccumulatorValue(sub_expr); |
| 4538 | PrepareForBailoutBeforeSplit(expr, true, if_true, if_false); |
| 4539 | |
| 4540 | Handle<Object> nil_value = nil == kNullValue |
| 4541 | ? isolate()->factory()->null_value() |
| 4542 | : isolate()->factory()->undefined_value(); |
| 4543 | if (expr->op() == Token::EQ_STRICT) { |
| 4544 | __ cmp(eax, nil_value); |
| 4545 | Split(equal, if_true, if_false, fall_through); |
| 4546 | } else { |
| 4547 | Handle<Code> ic = CompareNilICStub::GetUninitialized(isolate(), nil); |
| 4548 | CallIC(ic, expr->CompareOperationFeedbackId()); |
| 4549 | __ cmp(eax, isolate()->factory()->true_value()); |
| 4550 | Split(equal, if_true, if_false, fall_through); |
| 4551 | } |
| 4552 | context()->Plug(if_true, if_false); |
| 4553 | } |
| 4554 | |
| 4555 | |
| 4556 | void FullCodeGenerator::VisitThisFunction(ThisFunction* expr) { |
| 4557 | __ mov(eax, Operand(ebp, JavaScriptFrameConstants::kFunctionOffset)); |
| 4558 | context()->Plug(eax); |
| 4559 | } |
| 4560 | |
| 4561 | |
| 4562 | Register FullCodeGenerator::result_register() { |
| 4563 | return eax; |
| 4564 | } |
| 4565 | |
| 4566 | |
| 4567 | Register FullCodeGenerator::context_register() { |
| 4568 | return esi; |
| 4569 | } |
| 4570 | |
| 4571 | |
| 4572 | void FullCodeGenerator::StoreToFrameField(int frame_offset, Register value) { |
| 4573 | DCHECK_EQ(POINTER_SIZE_ALIGN(frame_offset), frame_offset); |
| 4574 | __ mov(Operand(ebp, frame_offset), value); |
| 4575 | } |
| 4576 | |
| 4577 | |
| 4578 | void FullCodeGenerator::LoadContextField(Register dst, int context_index) { |
| 4579 | __ mov(dst, ContextOperand(esi, context_index)); |
| 4580 | } |
| 4581 | |
| 4582 | |
| 4583 | void FullCodeGenerator::PushFunctionArgumentForContextAllocation() { |
| 4584 | Scope* closure_scope = scope()->ClosureScope(); |
| 4585 | if (closure_scope->is_script_scope() || |
| 4586 | closure_scope->is_module_scope()) { |
| 4587 | // Contexts nested in the native context have a canonical empty function |
| 4588 | // as their closure, not the anonymous closure containing the global |
| 4589 | // code. |
| 4590 | __ mov(eax, NativeContextOperand()); |
| 4591 | __ push(ContextOperand(eax, Context::CLOSURE_INDEX)); |
| 4592 | } else if (closure_scope->is_eval_scope()) { |
| 4593 | // Contexts nested inside eval code have the same closure as the context |
| 4594 | // calling eval, not the anonymous closure containing the eval code. |
| 4595 | // Fetch it from the context. |
| 4596 | __ push(ContextOperand(esi, Context::CLOSURE_INDEX)); |
| 4597 | } else { |
| 4598 | DCHECK(closure_scope->is_function_scope()); |
| 4599 | __ push(Operand(ebp, JavaScriptFrameConstants::kFunctionOffset)); |
| 4600 | } |
| 4601 | } |
| 4602 | |
| 4603 | |
| 4604 | // ---------------------------------------------------------------------------- |
| 4605 | // Non-local control flow support. |
| 4606 | |
| 4607 | void FullCodeGenerator::EnterFinallyBlock() { |
| 4608 | // Cook return address on top of stack (smi encoded Code* delta) |
| 4609 | DCHECK(!result_register().is(edx)); |
| 4610 | __ pop(edx); |
| 4611 | __ sub(edx, Immediate(masm_->CodeObject())); |
| 4612 | STATIC_ASSERT(kSmiTagSize + kSmiShiftSize == 1); |
| 4613 | STATIC_ASSERT(kSmiTag == 0); |
| 4614 | __ SmiTag(edx); |
| 4615 | __ push(edx); |
| 4616 | |
| 4617 | // Store result register while executing finally block. |
| 4618 | __ push(result_register()); |
| 4619 | |
| 4620 | // Store pending message while executing finally block. |
| 4621 | ExternalReference pending_message_obj = |
| 4622 | ExternalReference::address_of_pending_message_obj(isolate()); |
| 4623 | __ mov(edx, Operand::StaticVariable(pending_message_obj)); |
| 4624 | __ push(edx); |
| 4625 | |
| 4626 | ClearPendingMessage(); |
| 4627 | } |
| 4628 | |
| 4629 | |
| 4630 | void FullCodeGenerator::ExitFinallyBlock() { |
| 4631 | DCHECK(!result_register().is(edx)); |
| 4632 | // Restore pending message from stack. |
| 4633 | __ pop(edx); |
| 4634 | ExternalReference pending_message_obj = |
| 4635 | ExternalReference::address_of_pending_message_obj(isolate()); |
| 4636 | __ mov(Operand::StaticVariable(pending_message_obj), edx); |
| 4637 | |
| 4638 | // Restore result register from stack. |
| 4639 | __ pop(result_register()); |
| 4640 | |
| 4641 | // Uncook return address. |
| 4642 | __ pop(edx); |
| 4643 | __ SmiUntag(edx); |
| 4644 | __ add(edx, Immediate(masm_->CodeObject())); |
| 4645 | __ jmp(edx); |
| 4646 | } |
| 4647 | |
| 4648 | |
| 4649 | void FullCodeGenerator::ClearPendingMessage() { |
| 4650 | DCHECK(!result_register().is(edx)); |
| 4651 | ExternalReference pending_message_obj = |
| 4652 | ExternalReference::address_of_pending_message_obj(isolate()); |
| 4653 | __ mov(edx, Immediate(isolate()->factory()->the_hole_value())); |
| 4654 | __ mov(Operand::StaticVariable(pending_message_obj), edx); |
| 4655 | } |
| 4656 | |
| 4657 | |
| 4658 | void FullCodeGenerator::EmitLoadStoreICSlot(FeedbackVectorSlot slot) { |
| 4659 | DCHECK(!slot.IsInvalid()); |
| 4660 | __ mov(VectorStoreICTrampolineDescriptor::SlotRegister(), |
| 4661 | Immediate(SmiFromSlot(slot))); |
| 4662 | } |
| 4663 | |
| 4664 | |
| 4665 | #undef __ |
| 4666 | |
| 4667 | |
| 4668 | static const byte kJnsInstruction = 0x79; |
| 4669 | static const byte kJnsOffset = 0x11; |
| 4670 | static const byte kNopByteOne = 0x66; |
| 4671 | static const byte kNopByteTwo = 0x90; |
| 4672 | #ifdef DEBUG |
| 4673 | static const byte kCallInstruction = 0xe8; |
| 4674 | #endif |
| 4675 | |
| 4676 | |
| 4677 | void BackEdgeTable::PatchAt(Code* unoptimized_code, |
| 4678 | Address pc, |
| 4679 | BackEdgeState target_state, |
| 4680 | Code* replacement_code) { |
| 4681 | Address call_target_address = pc - kIntSize; |
| 4682 | Address jns_instr_address = call_target_address - 3; |
| 4683 | Address jns_offset_address = call_target_address - 2; |
| 4684 | |
| 4685 | switch (target_state) { |
| 4686 | case INTERRUPT: |
| 4687 | // sub <profiling_counter>, <delta> ;; Not changed |
| 4688 | // jns ok |
| 4689 | // call <interrupt stub> |
| 4690 | // ok: |
| 4691 | *jns_instr_address = kJnsInstruction; |
| 4692 | *jns_offset_address = kJnsOffset; |
| 4693 | break; |
| 4694 | case ON_STACK_REPLACEMENT: |
| 4695 | case OSR_AFTER_STACK_CHECK: |
| 4696 | // sub <profiling_counter>, <delta> ;; Not changed |
| 4697 | // nop |
| 4698 | // nop |
| 4699 | // call <on-stack replacment> |
| 4700 | // ok: |
| 4701 | *jns_instr_address = kNopByteOne; |
| 4702 | *jns_offset_address = kNopByteTwo; |
| 4703 | break; |
| 4704 | } |
| 4705 | |
| 4706 | Assembler::set_target_address_at(unoptimized_code->GetIsolate(), |
| 4707 | call_target_address, unoptimized_code, |
| 4708 | replacement_code->entry()); |
| 4709 | unoptimized_code->GetHeap()->incremental_marking()->RecordCodeTargetPatch( |
| 4710 | unoptimized_code, call_target_address, replacement_code); |
| 4711 | } |
| 4712 | |
| 4713 | |
| 4714 | BackEdgeTable::BackEdgeState BackEdgeTable::GetBackEdgeState( |
| 4715 | Isolate* isolate, |
| 4716 | Code* unoptimized_code, |
| 4717 | Address pc) { |
| 4718 | Address call_target_address = pc - kIntSize; |
| 4719 | Address jns_instr_address = call_target_address - 3; |
| 4720 | DCHECK_EQ(kCallInstruction, *(call_target_address - 1)); |
| 4721 | |
| 4722 | if (*jns_instr_address == kJnsInstruction) { |
| 4723 | DCHECK_EQ(kJnsOffset, *(call_target_address - 2)); |
| 4724 | DCHECK_EQ(isolate->builtins()->InterruptCheck()->entry(), |
| 4725 | Assembler::target_address_at(call_target_address, |
| 4726 | unoptimized_code)); |
| 4727 | return INTERRUPT; |
| 4728 | } |
| 4729 | |
| 4730 | DCHECK_EQ(kNopByteOne, *jns_instr_address); |
| 4731 | DCHECK_EQ(kNopByteTwo, *(call_target_address - 2)); |
| 4732 | |
| 4733 | if (Assembler::target_address_at(call_target_address, unoptimized_code) == |
| 4734 | isolate->builtins()->OnStackReplacement()->entry()) { |
| 4735 | return ON_STACK_REPLACEMENT; |
| 4736 | } |
| 4737 | |
| 4738 | DCHECK_EQ(isolate->builtins()->OsrAfterStackCheck()->entry(), |
| 4739 | Assembler::target_address_at(call_target_address, |
| 4740 | unoptimized_code)); |
| 4741 | return OSR_AFTER_STACK_CHECK; |
| 4742 | } |
| 4743 | |
| 4744 | |
| 4745 | } // namespace internal |
| 4746 | } // namespace v8 |
| 4747 | |
| 4748 | #endif // V8_TARGET_ARCH_X87 |