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| 1 // Copyright 2012 the V8 project authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #include "src/v8.h" | |
| 6 | |
| 7 #if V8_TARGET_ARCH_MIPS | |
| 8 | |
| 9 // Note on Mips implementation: | |
| 10 // | |
| 11 // The result_register() for mips is the 'v0' register, which is defined | |
| 12 // by the ABI to contain function return values. However, the first | |
| 13 // parameter to a function is defined to be 'a0'. So there are many | |
| 14 // places where we have to move a previous result in v0 to a0 for the | |
| 15 // next call: mov(a0, v0). This is not needed on the other architectures. | |
| 16 | |
| 17 #include "src/code-factory.h" | |
| 18 #include "src/code-stubs.h" | |
| 19 #include "src/codegen.h" | |
| 20 #include "src/compiler.h" | |
| 21 #include "src/debug.h" | |
| 22 #include "src/full-codegen.h" | |
| 23 #include "src/ic/ic.h" | |
| 24 #include "src/parser.h" | |
| 25 #include "src/scopes.h" | |
| 26 | |
| 27 #include "src/mips/code-stubs-mips.h" | |
| 28 #include "src/mips/macro-assembler-mips.h" | |
| 29 | |
| 30 namespace v8 { | |
| 31 namespace internal { | |
| 32 | |
| 33 #define __ ACCESS_MASM(masm_) | |
| 34 | |
| 35 | |
| 36 // A patch site is a location in the code which it is possible to patch. This | |
| 37 // class has a number of methods to emit the code which is patchable and the | |
| 38 // method EmitPatchInfo to record a marker back to the patchable code. This | |
| 39 // marker is a andi zero_reg, rx, #yyyy instruction, and rx * 0x0000ffff + yyyy | |
| 40 // (raw 16 bit immediate value is used) is the delta from the pc to the first | |
| 41 // instruction of the patchable code. | |
| 42 // The marker instruction is effectively a NOP (dest is zero_reg) and will | |
| 43 // never be emitted by normal code. | |
| 44 class JumpPatchSite BASE_EMBEDDED { | |
| 45 public: | |
| 46 explicit JumpPatchSite(MacroAssembler* masm) : masm_(masm) { | |
| 47 #ifdef DEBUG | |
| 48 info_emitted_ = false; | |
| 49 #endif | |
| 50 } | |
| 51 | |
| 52 ~JumpPatchSite() { | |
| 53 DCHECK(patch_site_.is_bound() == info_emitted_); | |
| 54 } | |
| 55 | |
| 56 // When initially emitting this ensure that a jump is always generated to skip | |
| 57 // the inlined smi code. | |
| 58 void EmitJumpIfNotSmi(Register reg, Label* target) { | |
| 59 DCHECK(!patch_site_.is_bound() && !info_emitted_); | |
| 60 Assembler::BlockTrampolinePoolScope block_trampoline_pool(masm_); | |
| 61 __ bind(&patch_site_); | |
| 62 __ andi(at, reg, 0); | |
| 63 // Always taken before patched. | |
| 64 __ BranchShort(target, eq, at, Operand(zero_reg)); | |
| 65 } | |
| 66 | |
| 67 // When initially emitting this ensure that a jump is never generated to skip | |
| 68 // the inlined smi code. | |
| 69 void EmitJumpIfSmi(Register reg, Label* target) { | |
| 70 Assembler::BlockTrampolinePoolScope block_trampoline_pool(masm_); | |
| 71 DCHECK(!patch_site_.is_bound() && !info_emitted_); | |
| 72 __ bind(&patch_site_); | |
| 73 __ andi(at, reg, 0); | |
| 74 // Never taken before patched. | |
| 75 __ BranchShort(target, ne, at, Operand(zero_reg)); | |
| 76 } | |
| 77 | |
| 78 void EmitPatchInfo() { | |
| 79 if (patch_site_.is_bound()) { | |
| 80 int delta_to_patch_site = masm_->InstructionsGeneratedSince(&patch_site_); | |
| 81 Register reg = Register::from_code(delta_to_patch_site / kImm16Mask); | |
| 82 __ andi(zero_reg, reg, delta_to_patch_site % kImm16Mask); | |
| 83 #ifdef DEBUG | |
| 84 info_emitted_ = true; | |
| 85 #endif | |
| 86 } else { | |
| 87 __ nop(); // Signals no inlined code. | |
| 88 } | |
| 89 } | |
| 90 | |
| 91 private: | |
| 92 MacroAssembler* masm_; | |
| 93 Label patch_site_; | |
| 94 #ifdef DEBUG | |
| 95 bool info_emitted_; | |
| 96 #endif | |
| 97 }; | |
| 98 | |
| 99 | |
| 100 // Generate code for a JS function. On entry to the function the receiver | |
| 101 // and arguments have been pushed on the stack left to right. The actual | |
| 102 // argument count matches the formal parameter count expected by the | |
| 103 // function. | |
| 104 // | |
| 105 // The live registers are: | |
| 106 // o a1: the JS function object being called (i.e. ourselves) | |
| 107 // o cp: our context | |
| 108 // o fp: our caller's frame pointer | |
| 109 // o sp: stack pointer | |
| 110 // o ra: return address | |
| 111 // | |
| 112 // The function builds a JS frame. Please see JavaScriptFrameConstants in | |
| 113 // frames-mips.h for its layout. | |
| 114 void FullCodeGenerator::Generate() { | |
| 115 CompilationInfo* info = info_; | |
| 116 profiling_counter_ = isolate()->factory()->NewCell( | |
| 117 Handle<Smi>(Smi::FromInt(FLAG_interrupt_budget), isolate())); | |
| 118 SetFunctionPosition(function()); | |
| 119 Comment cmnt(masm_, "[ function compiled by full code generator"); | |
| 120 | |
| 121 ProfileEntryHookStub::MaybeCallEntryHook(masm_); | |
| 122 | |
| 123 #ifdef DEBUG | |
| 124 if (strlen(FLAG_stop_at) > 0 && | |
| 125 info->function()->name()->IsUtf8EqualTo(CStrVector(FLAG_stop_at))) { | |
| 126 __ stop("stop-at"); | |
| 127 } | |
| 128 #endif | |
| 129 | |
| 130 // Sloppy mode functions and builtins need to replace the receiver with the | |
| 131 // global proxy when called as functions (without an explicit receiver | |
| 132 // object). | |
| 133 if (is_sloppy(info->language_mode()) && !info->is_native() && | |
| 134 info->MayUseThis() && info->scope()->has_this_declaration()) { | |
| 135 Label ok; | |
| 136 int receiver_offset = info->scope()->num_parameters() * kPointerSize; | |
| 137 __ lw(at, MemOperand(sp, receiver_offset)); | |
| 138 __ LoadRoot(a2, Heap::kUndefinedValueRootIndex); | |
| 139 __ Branch(&ok, ne, a2, Operand(at)); | |
| 140 | |
| 141 __ lw(a2, GlobalObjectOperand()); | |
| 142 __ lw(a2, FieldMemOperand(a2, GlobalObject::kGlobalProxyOffset)); | |
| 143 | |
| 144 __ sw(a2, MemOperand(sp, receiver_offset)); | |
| 145 | |
| 146 __ bind(&ok); | |
| 147 } | |
| 148 | |
| 149 // Open a frame scope to indicate that there is a frame on the stack. The | |
| 150 // MANUAL indicates that the scope shouldn't actually generate code to set up | |
| 151 // the frame (that is done below). | |
| 152 FrameScope frame_scope(masm_, StackFrame::MANUAL); | |
| 153 | |
| 154 info->set_prologue_offset(masm_->pc_offset()); | |
| 155 __ Prologue(info->IsCodePreAgingActive()); | |
| 156 info->AddNoFrameRange(0, masm_->pc_offset()); | |
| 157 | |
| 158 { Comment cmnt(masm_, "[ Allocate locals"); | |
| 159 int locals_count = info->scope()->num_stack_slots(); | |
| 160 // Generators allocate locals, if any, in context slots. | |
| 161 DCHECK(!IsGeneratorFunction(info->function()->kind()) || locals_count == 0); | |
| 162 if (locals_count > 0) { | |
| 163 if (locals_count >= 128) { | |
| 164 Label ok; | |
| 165 __ Subu(t5, sp, Operand(locals_count * kPointerSize)); | |
| 166 __ LoadRoot(a2, Heap::kRealStackLimitRootIndex); | |
| 167 __ Branch(&ok, hs, t5, Operand(a2)); | |
| 168 __ InvokeBuiltin(Builtins::STACK_OVERFLOW, CALL_FUNCTION); | |
| 169 __ bind(&ok); | |
| 170 } | |
| 171 __ LoadRoot(t5, Heap::kUndefinedValueRootIndex); | |
| 172 int kMaxPushes = FLAG_optimize_for_size ? 4 : 32; | |
| 173 if (locals_count >= kMaxPushes) { | |
| 174 int loop_iterations = locals_count / kMaxPushes; | |
| 175 __ li(a2, Operand(loop_iterations)); | |
| 176 Label loop_header; | |
| 177 __ bind(&loop_header); | |
| 178 // Do pushes. | |
| 179 __ Subu(sp, sp, Operand(kMaxPushes * kPointerSize)); | |
| 180 for (int i = 0; i < kMaxPushes; i++) { | |
| 181 __ sw(t5, MemOperand(sp, i * kPointerSize)); | |
| 182 } | |
| 183 // Continue loop if not done. | |
| 184 __ Subu(a2, a2, Operand(1)); | |
| 185 __ Branch(&loop_header, ne, a2, Operand(zero_reg)); | |
| 186 } | |
| 187 int remaining = locals_count % kMaxPushes; | |
| 188 // Emit the remaining pushes. | |
| 189 __ Subu(sp, sp, Operand(remaining * kPointerSize)); | |
| 190 for (int i = 0; i < remaining; i++) { | |
| 191 __ sw(t5, MemOperand(sp, i * kPointerSize)); | |
| 192 } | |
| 193 } | |
| 194 } | |
| 195 | |
| 196 bool function_in_register = true; | |
| 197 | |
| 198 // Possibly allocate a local context. | |
| 199 if (info->scope()->num_heap_slots() > 0) { | |
| 200 Comment cmnt(masm_, "[ Allocate context"); | |
| 201 // Argument to NewContext is the function, which is still in a1. | |
| 202 bool need_write_barrier = true; | |
| 203 int slots = info->scope()->num_heap_slots() - Context::MIN_CONTEXT_SLOTS; | |
| 204 if (info->scope()->is_script_scope()) { | |
| 205 __ push(a1); | |
| 206 __ Push(info->scope()->GetScopeInfo(info->isolate())); | |
| 207 __ CallRuntime(Runtime::kNewScriptContext, 2); | |
| 208 } else if (slots <= FastNewContextStub::kMaximumSlots) { | |
| 209 FastNewContextStub stub(isolate(), slots); | |
| 210 __ CallStub(&stub); | |
| 211 // Result of FastNewContextStub is always in new space. | |
| 212 need_write_barrier = false; | |
| 213 } else { | |
| 214 __ push(a1); | |
| 215 __ CallRuntime(Runtime::kNewFunctionContext, 1); | |
| 216 } | |
| 217 function_in_register = false; | |
| 218 // Context is returned in v0. It replaces the context passed to us. | |
| 219 // It's saved in the stack and kept live in cp. | |
| 220 __ mov(cp, v0); | |
| 221 __ sw(v0, MemOperand(fp, StandardFrameConstants::kContextOffset)); | |
| 222 // Copy any necessary parameters into the context. | |
| 223 int num_parameters = info->scope()->num_parameters(); | |
| 224 int first_parameter = info->scope()->has_this_declaration() ? -1 : 0; | |
| 225 for (int i = first_parameter; i < num_parameters; i++) { | |
| 226 Variable* var = (i == -1) ? scope()->receiver() : scope()->parameter(i); | |
| 227 if (var->IsContextSlot()) { | |
| 228 int parameter_offset = StandardFrameConstants::kCallerSPOffset + | |
| 229 (num_parameters - 1 - i) * kPointerSize; | |
| 230 // Load parameter from stack. | |
| 231 __ lw(a0, MemOperand(fp, parameter_offset)); | |
| 232 // Store it in the context. | |
| 233 MemOperand target = ContextOperand(cp, var->index()); | |
| 234 __ sw(a0, target); | |
| 235 | |
| 236 // Update the write barrier. | |
| 237 if (need_write_barrier) { | |
| 238 __ RecordWriteContextSlot( | |
| 239 cp, target.offset(), a0, a3, kRAHasBeenSaved, kDontSaveFPRegs); | |
| 240 } else if (FLAG_debug_code) { | |
| 241 Label done; | |
| 242 __ JumpIfInNewSpace(cp, a0, &done); | |
| 243 __ Abort(kExpectedNewSpaceObject); | |
| 244 __ bind(&done); | |
| 245 } | |
| 246 } | |
| 247 } | |
| 248 } | |
| 249 | |
| 250 // Possibly set up a local binding to the this function which is used in | |
| 251 // derived constructors with super calls. | |
| 252 Variable* this_function_var = scope()->this_function_var(); | |
| 253 if (this_function_var != nullptr) { | |
| 254 Comment cmnt(masm_, "[ This function"); | |
| 255 if (!function_in_register) { | |
| 256 __ lw(a1, MemOperand(fp, JavaScriptFrameConstants::kFunctionOffset)); | |
| 257 // The write barrier clobbers register again, keep is marked as such. | |
| 258 } | |
| 259 SetVar(this_function_var, a1, a2, a3); | |
| 260 } | |
| 261 | |
| 262 Variable* new_target_var = scope()->new_target_var(); | |
| 263 if (new_target_var != nullptr) { | |
| 264 Comment cmnt(masm_, "[ new.target"); | |
| 265 | |
| 266 // Get the frame pointer for the calling frame. | |
| 267 __ lw(a2, MemOperand(fp, StandardFrameConstants::kCallerFPOffset)); | |
| 268 | |
| 269 // Skip the arguments adaptor frame if it exists. | |
| 270 Label check_frame_marker; | |
| 271 __ lw(a1, MemOperand(a2, StandardFrameConstants::kContextOffset)); | |
| 272 __ Branch(&check_frame_marker, ne, a1, | |
| 273 Operand(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR))); | |
| 274 __ lw(a2, MemOperand(a2, StandardFrameConstants::kCallerFPOffset)); | |
| 275 | |
| 276 // Check the marker in the calling frame. | |
| 277 __ bind(&check_frame_marker); | |
| 278 __ lw(a1, MemOperand(a2, StandardFrameConstants::kMarkerOffset)); | |
| 279 | |
| 280 Label non_construct_frame, done; | |
| 281 __ Branch(&non_construct_frame, ne, a1, | |
| 282 Operand(Smi::FromInt(StackFrame::CONSTRUCT))); | |
| 283 | |
| 284 __ lw(v0, | |
| 285 MemOperand(a2, ConstructFrameConstants::kOriginalConstructorOffset)); | |
| 286 __ Branch(&done); | |
| 287 | |
| 288 __ bind(&non_construct_frame); | |
| 289 __ LoadRoot(v0, Heap::kUndefinedValueRootIndex); | |
| 290 __ bind(&done); | |
| 291 | |
| 292 SetVar(new_target_var, v0, a2, a3); | |
| 293 } | |
| 294 | |
| 295 // Possibly allocate RestParameters | |
| 296 int rest_index; | |
| 297 Variable* rest_param = scope()->rest_parameter(&rest_index); | |
| 298 if (rest_param) { | |
| 299 Comment cmnt(masm_, "[ Allocate rest parameter array"); | |
| 300 | |
| 301 int num_parameters = info->scope()->num_parameters(); | |
| 302 int offset = num_parameters * kPointerSize; | |
| 303 | |
| 304 __ Addu(a3, fp, | |
| 305 Operand(StandardFrameConstants::kCallerSPOffset + offset)); | |
| 306 __ li(a2, Operand(Smi::FromInt(num_parameters))); | |
| 307 __ li(a1, Operand(Smi::FromInt(rest_index))); | |
| 308 __ li(a0, Operand(Smi::FromInt(language_mode()))); | |
| 309 __ Push(a3, a2, a1, a0); | |
| 310 | |
| 311 RestParamAccessStub stub(isolate()); | |
| 312 __ CallStub(&stub); | |
| 313 | |
| 314 SetVar(rest_param, v0, a1, a2); | |
| 315 } | |
| 316 | |
| 317 Variable* arguments = scope()->arguments(); | |
| 318 if (arguments != NULL) { | |
| 319 // Function uses arguments object. | |
| 320 Comment cmnt(masm_, "[ Allocate arguments object"); | |
| 321 if (!function_in_register) { | |
| 322 // Load this again, if it's used by the local context below. | |
| 323 __ lw(a3, MemOperand(fp, JavaScriptFrameConstants::kFunctionOffset)); | |
| 324 } else { | |
| 325 __ mov(a3, a1); | |
| 326 } | |
| 327 // Receiver is just before the parameters on the caller's stack. | |
| 328 int num_parameters = info->scope()->num_parameters(); | |
| 329 int offset = num_parameters * kPointerSize; | |
| 330 __ Addu(a2, fp, | |
| 331 Operand(StandardFrameConstants::kCallerSPOffset + offset)); | |
| 332 __ li(a1, Operand(Smi::FromInt(num_parameters))); | |
| 333 __ Push(a3, a2, a1); | |
| 334 | |
| 335 // Arguments to ArgumentsAccessStub: | |
| 336 // function, receiver address, parameter count. | |
| 337 // The stub will rewrite receiever and parameter count if the previous | |
| 338 // stack frame was an arguments adapter frame. | |
| 339 ArgumentsAccessStub::Type type; | |
| 340 if (is_strict(language_mode()) || !is_simple_parameter_list()) { | |
| 341 type = ArgumentsAccessStub::NEW_STRICT; | |
| 342 } else if (function()->has_duplicate_parameters()) { | |
| 343 type = ArgumentsAccessStub::NEW_SLOPPY_SLOW; | |
| 344 } else { | |
| 345 type = ArgumentsAccessStub::NEW_SLOPPY_FAST; | |
| 346 } | |
| 347 ArgumentsAccessStub stub(isolate(), type); | |
| 348 __ CallStub(&stub); | |
| 349 | |
| 350 SetVar(arguments, v0, a1, a2); | |
| 351 } | |
| 352 | |
| 353 if (FLAG_trace) { | |
| 354 __ CallRuntime(Runtime::kTraceEnter, 0); | |
| 355 } | |
| 356 | |
| 357 // Visit the declarations and body unless there is an illegal | |
| 358 // redeclaration. | |
| 359 if (scope()->HasIllegalRedeclaration()) { | |
| 360 Comment cmnt(masm_, "[ Declarations"); | |
| 361 scope()->VisitIllegalRedeclaration(this); | |
| 362 | |
| 363 } else { | |
| 364 PrepareForBailoutForId(BailoutId::FunctionEntry(), NO_REGISTERS); | |
| 365 { Comment cmnt(masm_, "[ Declarations"); | |
| 366 VisitDeclarations(scope()->declarations()); | |
| 367 } | |
| 368 | |
| 369 { Comment cmnt(masm_, "[ Stack check"); | |
| 370 PrepareForBailoutForId(BailoutId::Declarations(), NO_REGISTERS); | |
| 371 Label ok; | |
| 372 __ LoadRoot(at, Heap::kStackLimitRootIndex); | |
| 373 __ Branch(&ok, hs, sp, Operand(at)); | |
| 374 Handle<Code> stack_check = isolate()->builtins()->StackCheck(); | |
| 375 PredictableCodeSizeScope predictable(masm_, | |
| 376 masm_->CallSize(stack_check, RelocInfo::CODE_TARGET)); | |
| 377 __ Call(stack_check, RelocInfo::CODE_TARGET); | |
| 378 __ bind(&ok); | |
| 379 } | |
| 380 | |
| 381 { Comment cmnt(masm_, "[ Body"); | |
| 382 DCHECK(loop_depth() == 0); | |
| 383 VisitStatements(function()->body()); | |
| 384 DCHECK(loop_depth() == 0); | |
| 385 } | |
| 386 } | |
| 387 | |
| 388 // Always emit a 'return undefined' in case control fell off the end of | |
| 389 // the body. | |
| 390 { Comment cmnt(masm_, "[ return <undefined>;"); | |
| 391 __ LoadRoot(v0, Heap::kUndefinedValueRootIndex); | |
| 392 } | |
| 393 EmitReturnSequence(); | |
| 394 } | |
| 395 | |
| 396 | |
| 397 void FullCodeGenerator::ClearAccumulator() { | |
| 398 DCHECK(Smi::FromInt(0) == 0); | |
| 399 __ mov(v0, zero_reg); | |
| 400 } | |
| 401 | |
| 402 | |
| 403 void FullCodeGenerator::EmitProfilingCounterDecrement(int delta) { | |
| 404 __ li(a2, Operand(profiling_counter_)); | |
| 405 __ lw(a3, FieldMemOperand(a2, Cell::kValueOffset)); | |
| 406 __ Subu(a3, a3, Operand(Smi::FromInt(delta))); | |
| 407 __ sw(a3, FieldMemOperand(a2, Cell::kValueOffset)); | |
| 408 } | |
| 409 | |
| 410 | |
| 411 void FullCodeGenerator::EmitProfilingCounterReset() { | |
| 412 int reset_value = FLAG_interrupt_budget; | |
| 413 if (info_->is_debug()) { | |
| 414 // Detect debug break requests as soon as possible. | |
| 415 reset_value = FLAG_interrupt_budget >> 4; | |
| 416 } | |
| 417 __ li(a2, Operand(profiling_counter_)); | |
| 418 __ li(a3, Operand(Smi::FromInt(reset_value))); | |
| 419 __ sw(a3, FieldMemOperand(a2, Cell::kValueOffset)); | |
| 420 } | |
| 421 | |
| 422 | |
| 423 void FullCodeGenerator::EmitBackEdgeBookkeeping(IterationStatement* stmt, | |
| 424 Label* back_edge_target) { | |
| 425 // The generated code is used in Deoptimizer::PatchStackCheckCodeAt so we need | |
| 426 // to make sure it is constant. Branch may emit a skip-or-jump sequence | |
| 427 // instead of the normal Branch. It seems that the "skip" part of that | |
| 428 // sequence is about as long as this Branch would be so it is safe to ignore | |
| 429 // that. | |
| 430 Assembler::BlockTrampolinePoolScope block_trampoline_pool(masm_); | |
| 431 Comment cmnt(masm_, "[ Back edge bookkeeping"); | |
| 432 Label ok; | |
| 433 DCHECK(back_edge_target->is_bound()); | |
| 434 int distance = masm_->SizeOfCodeGeneratedSince(back_edge_target); | |
| 435 int weight = Min(kMaxBackEdgeWeight, | |
| 436 Max(1, distance / kCodeSizeMultiplier)); | |
| 437 EmitProfilingCounterDecrement(weight); | |
| 438 __ slt(at, a3, zero_reg); | |
| 439 __ beq(at, zero_reg, &ok); | |
| 440 // Call will emit a li t9 first, so it is safe to use the delay slot. | |
| 441 __ Call(isolate()->builtins()->InterruptCheck(), RelocInfo::CODE_TARGET); | |
| 442 // Record a mapping of this PC offset to the OSR id. This is used to find | |
| 443 // the AST id from the unoptimized code in order to use it as a key into | |
| 444 // the deoptimization input data found in the optimized code. | |
| 445 RecordBackEdge(stmt->OsrEntryId()); | |
| 446 EmitProfilingCounterReset(); | |
| 447 | |
| 448 __ bind(&ok); | |
| 449 PrepareForBailoutForId(stmt->EntryId(), NO_REGISTERS); | |
| 450 // Record a mapping of the OSR id to this PC. This is used if the OSR | |
| 451 // entry becomes the target of a bailout. We don't expect it to be, but | |
| 452 // we want it to work if it is. | |
| 453 PrepareForBailoutForId(stmt->OsrEntryId(), NO_REGISTERS); | |
| 454 } | |
| 455 | |
| 456 | |
| 457 void FullCodeGenerator::EmitReturnSequence() { | |
| 458 Comment cmnt(masm_, "[ Return sequence"); | |
| 459 if (return_label_.is_bound()) { | |
| 460 __ Branch(&return_label_); | |
| 461 } else { | |
| 462 __ bind(&return_label_); | |
| 463 if (FLAG_trace) { | |
| 464 // Push the return value on the stack as the parameter. | |
| 465 // Runtime::TraceExit returns its parameter in v0. | |
| 466 __ push(v0); | |
| 467 __ CallRuntime(Runtime::kTraceExit, 1); | |
| 468 } | |
| 469 // Pretend that the exit is a backwards jump to the entry. | |
| 470 int weight = 1; | |
| 471 if (info_->ShouldSelfOptimize()) { | |
| 472 weight = FLAG_interrupt_budget / FLAG_self_opt_count; | |
| 473 } else { | |
| 474 int distance = masm_->pc_offset(); | |
| 475 weight = Min(kMaxBackEdgeWeight, | |
| 476 Max(1, distance / kCodeSizeMultiplier)); | |
| 477 } | |
| 478 EmitProfilingCounterDecrement(weight); | |
| 479 Label ok; | |
| 480 __ Branch(&ok, ge, a3, Operand(zero_reg)); | |
| 481 __ push(v0); | |
| 482 __ Call(isolate()->builtins()->InterruptCheck(), | |
| 483 RelocInfo::CODE_TARGET); | |
| 484 __ pop(v0); | |
| 485 EmitProfilingCounterReset(); | |
| 486 __ bind(&ok); | |
| 487 | |
| 488 // Make sure that the constant pool is not emitted inside of the return | |
| 489 // sequence. | |
| 490 { Assembler::BlockTrampolinePoolScope block_trampoline_pool(masm_); | |
| 491 // Here we use masm_-> instead of the __ macro to avoid the code coverage | |
| 492 // tool from instrumenting as we rely on the code size here. | |
| 493 int32_t arg_count = info_->scope()->num_parameters() + 1; | |
| 494 int32_t sp_delta = arg_count * kPointerSize; | |
| 495 SetReturnPosition(function()); | |
| 496 masm_->mov(sp, fp); | |
| 497 int no_frame_start = masm_->pc_offset(); | |
| 498 masm_->MultiPop(static_cast<RegList>(fp.bit() | ra.bit())); | |
| 499 masm_->Addu(sp, sp, Operand(sp_delta)); | |
| 500 masm_->Jump(ra); | |
| 501 info_->AddNoFrameRange(no_frame_start, masm_->pc_offset()); | |
| 502 } | |
| 503 } | |
| 504 } | |
| 505 | |
| 506 | |
| 507 void FullCodeGenerator::StackValueContext::Plug(Variable* var) const { | |
| 508 DCHECK(var->IsStackAllocated() || var->IsContextSlot()); | |
| 509 codegen()->GetVar(result_register(), var); | |
| 510 __ push(result_register()); | |
| 511 } | |
| 512 | |
| 513 | |
| 514 void FullCodeGenerator::EffectContext::Plug(Heap::RootListIndex index) const { | |
| 515 } | |
| 516 | |
| 517 | |
| 518 void FullCodeGenerator::AccumulatorValueContext::Plug( | |
| 519 Heap::RootListIndex index) const { | |
| 520 __ LoadRoot(result_register(), index); | |
| 521 } | |
| 522 | |
| 523 | |
| 524 void FullCodeGenerator::StackValueContext::Plug( | |
| 525 Heap::RootListIndex index) const { | |
| 526 __ LoadRoot(result_register(), index); | |
| 527 __ push(result_register()); | |
| 528 } | |
| 529 | |
| 530 | |
| 531 void FullCodeGenerator::TestContext::Plug(Heap::RootListIndex index) const { | |
| 532 codegen()->PrepareForBailoutBeforeSplit(condition(), | |
| 533 true, | |
| 534 true_label_, | |
| 535 false_label_); | |
| 536 if (index == Heap::kUndefinedValueRootIndex || | |
| 537 index == Heap::kNullValueRootIndex || | |
| 538 index == Heap::kFalseValueRootIndex) { | |
| 539 if (false_label_ != fall_through_) __ Branch(false_label_); | |
| 540 } else if (index == Heap::kTrueValueRootIndex) { | |
| 541 if (true_label_ != fall_through_) __ Branch(true_label_); | |
| 542 } else { | |
| 543 __ LoadRoot(result_register(), index); | |
| 544 codegen()->DoTest(this); | |
| 545 } | |
| 546 } | |
| 547 | |
| 548 | |
| 549 void FullCodeGenerator::EffectContext::Plug(Handle<Object> lit) const { | |
| 550 } | |
| 551 | |
| 552 | |
| 553 void FullCodeGenerator::AccumulatorValueContext::Plug( | |
| 554 Handle<Object> lit) const { | |
| 555 __ li(result_register(), Operand(lit)); | |
| 556 } | |
| 557 | |
| 558 | |
| 559 void FullCodeGenerator::StackValueContext::Plug(Handle<Object> lit) const { | |
| 560 // Immediates cannot be pushed directly. | |
| 561 __ li(result_register(), Operand(lit)); | |
| 562 __ push(result_register()); | |
| 563 } | |
| 564 | |
| 565 | |
| 566 void FullCodeGenerator::TestContext::Plug(Handle<Object> lit) const { | |
| 567 codegen()->PrepareForBailoutBeforeSplit(condition(), | |
| 568 true, | |
| 569 true_label_, | |
| 570 false_label_); | |
| 571 DCHECK(!lit->IsUndetectableObject()); // There are no undetectable literals. | |
| 572 if (lit->IsUndefined() || lit->IsNull() || lit->IsFalse()) { | |
| 573 if (false_label_ != fall_through_) __ Branch(false_label_); | |
| 574 } else if (lit->IsTrue() || lit->IsJSObject()) { | |
| 575 if (true_label_ != fall_through_) __ Branch(true_label_); | |
| 576 } else if (lit->IsString()) { | |
| 577 if (String::cast(*lit)->length() == 0) { | |
| 578 if (false_label_ != fall_through_) __ Branch(false_label_); | |
| 579 } else { | |
| 580 if (true_label_ != fall_through_) __ Branch(true_label_); | |
| 581 } | |
| 582 } else if (lit->IsSmi()) { | |
| 583 if (Smi::cast(*lit)->value() == 0) { | |
| 584 if (false_label_ != fall_through_) __ Branch(false_label_); | |
| 585 } else { | |
| 586 if (true_label_ != fall_through_) __ Branch(true_label_); | |
| 587 } | |
| 588 } else { | |
| 589 // For simplicity we always test the accumulator register. | |
| 590 __ li(result_register(), Operand(lit)); | |
| 591 codegen()->DoTest(this); | |
| 592 } | |
| 593 } | |
| 594 | |
| 595 | |
| 596 void FullCodeGenerator::EffectContext::DropAndPlug(int count, | |
| 597 Register reg) const { | |
| 598 DCHECK(count > 0); | |
| 599 __ Drop(count); | |
| 600 } | |
| 601 | |
| 602 | |
| 603 void FullCodeGenerator::AccumulatorValueContext::DropAndPlug( | |
| 604 int count, | |
| 605 Register reg) const { | |
| 606 DCHECK(count > 0); | |
| 607 __ Drop(count); | |
| 608 __ Move(result_register(), reg); | |
| 609 } | |
| 610 | |
| 611 | |
| 612 void FullCodeGenerator::StackValueContext::DropAndPlug(int count, | |
| 613 Register reg) const { | |
| 614 DCHECK(count > 0); | |
| 615 if (count > 1) __ Drop(count - 1); | |
| 616 __ sw(reg, MemOperand(sp, 0)); | |
| 617 } | |
| 618 | |
| 619 | |
| 620 void FullCodeGenerator::TestContext::DropAndPlug(int count, | |
| 621 Register reg) const { | |
| 622 DCHECK(count > 0); | |
| 623 // For simplicity we always test the accumulator register. | |
| 624 __ Drop(count); | |
| 625 __ Move(result_register(), reg); | |
| 626 codegen()->PrepareForBailoutBeforeSplit(condition(), false, NULL, NULL); | |
| 627 codegen()->DoTest(this); | |
| 628 } | |
| 629 | |
| 630 | |
| 631 void FullCodeGenerator::EffectContext::Plug(Label* materialize_true, | |
| 632 Label* materialize_false) const { | |
| 633 DCHECK(materialize_true == materialize_false); | |
| 634 __ bind(materialize_true); | |
| 635 } | |
| 636 | |
| 637 | |
| 638 void FullCodeGenerator::AccumulatorValueContext::Plug( | |
| 639 Label* materialize_true, | |
| 640 Label* materialize_false) const { | |
| 641 Label done; | |
| 642 __ bind(materialize_true); | |
| 643 __ LoadRoot(result_register(), Heap::kTrueValueRootIndex); | |
| 644 __ Branch(&done); | |
| 645 __ bind(materialize_false); | |
| 646 __ LoadRoot(result_register(), Heap::kFalseValueRootIndex); | |
| 647 __ bind(&done); | |
| 648 } | |
| 649 | |
| 650 | |
| 651 void FullCodeGenerator::StackValueContext::Plug( | |
| 652 Label* materialize_true, | |
| 653 Label* materialize_false) const { | |
| 654 Label done; | |
| 655 __ bind(materialize_true); | |
| 656 __ LoadRoot(at, Heap::kTrueValueRootIndex); | |
| 657 // Push the value as the following branch can clobber at in long branch mode. | |
| 658 __ push(at); | |
| 659 __ Branch(&done); | |
| 660 __ bind(materialize_false); | |
| 661 __ LoadRoot(at, Heap::kFalseValueRootIndex); | |
| 662 __ push(at); | |
| 663 __ bind(&done); | |
| 664 } | |
| 665 | |
| 666 | |
| 667 void FullCodeGenerator::TestContext::Plug(Label* materialize_true, | |
| 668 Label* materialize_false) const { | |
| 669 DCHECK(materialize_true == true_label_); | |
| 670 DCHECK(materialize_false == false_label_); | |
| 671 } | |
| 672 | |
| 673 | |
| 674 void FullCodeGenerator::AccumulatorValueContext::Plug(bool flag) const { | |
| 675 Heap::RootListIndex value_root_index = | |
| 676 flag ? Heap::kTrueValueRootIndex : Heap::kFalseValueRootIndex; | |
| 677 __ LoadRoot(result_register(), value_root_index); | |
| 678 } | |
| 679 | |
| 680 | |
| 681 void FullCodeGenerator::StackValueContext::Plug(bool flag) const { | |
| 682 Heap::RootListIndex value_root_index = | |
| 683 flag ? Heap::kTrueValueRootIndex : Heap::kFalseValueRootIndex; | |
| 684 __ LoadRoot(at, value_root_index); | |
| 685 __ push(at); | |
| 686 } | |
| 687 | |
| 688 | |
| 689 void FullCodeGenerator::TestContext::Plug(bool flag) const { | |
| 690 codegen()->PrepareForBailoutBeforeSplit(condition(), | |
| 691 true, | |
| 692 true_label_, | |
| 693 false_label_); | |
| 694 if (flag) { | |
| 695 if (true_label_ != fall_through_) __ Branch(true_label_); | |
| 696 } else { | |
| 697 if (false_label_ != fall_through_) __ Branch(false_label_); | |
| 698 } | |
| 699 } | |
| 700 | |
| 701 | |
| 702 void FullCodeGenerator::DoTest(Expression* condition, | |
| 703 Label* if_true, | |
| 704 Label* if_false, | |
| 705 Label* fall_through) { | |
| 706 __ mov(a0, result_register()); | |
| 707 Handle<Code> ic = ToBooleanStub::GetUninitialized(isolate()); | |
| 708 CallIC(ic, condition->test_id()); | |
| 709 __ mov(at, zero_reg); | |
| 710 Split(ne, v0, Operand(at), if_true, if_false, fall_through); | |
| 711 } | |
| 712 | |
| 713 | |
| 714 void FullCodeGenerator::Split(Condition cc, | |
| 715 Register lhs, | |
| 716 const Operand& rhs, | |
| 717 Label* if_true, | |
| 718 Label* if_false, | |
| 719 Label* fall_through) { | |
| 720 if (if_false == fall_through) { | |
| 721 __ Branch(if_true, cc, lhs, rhs); | |
| 722 } else if (if_true == fall_through) { | |
| 723 __ Branch(if_false, NegateCondition(cc), lhs, rhs); | |
| 724 } else { | |
| 725 __ Branch(if_true, cc, lhs, rhs); | |
| 726 __ Branch(if_false); | |
| 727 } | |
| 728 } | |
| 729 | |
| 730 | |
| 731 MemOperand FullCodeGenerator::StackOperand(Variable* var) { | |
| 732 DCHECK(var->IsStackAllocated()); | |
| 733 // Offset is negative because higher indexes are at lower addresses. | |
| 734 int offset = -var->index() * kPointerSize; | |
| 735 // Adjust by a (parameter or local) base offset. | |
| 736 if (var->IsParameter()) { | |
| 737 offset += (info_->scope()->num_parameters() + 1) * kPointerSize; | |
| 738 } else { | |
| 739 offset += JavaScriptFrameConstants::kLocal0Offset; | |
| 740 } | |
| 741 return MemOperand(fp, offset); | |
| 742 } | |
| 743 | |
| 744 | |
| 745 MemOperand FullCodeGenerator::VarOperand(Variable* var, Register scratch) { | |
| 746 DCHECK(var->IsContextSlot() || var->IsStackAllocated()); | |
| 747 if (var->IsContextSlot()) { | |
| 748 int context_chain_length = scope()->ContextChainLength(var->scope()); | |
| 749 __ LoadContext(scratch, context_chain_length); | |
| 750 return ContextOperand(scratch, var->index()); | |
| 751 } else { | |
| 752 return StackOperand(var); | |
| 753 } | |
| 754 } | |
| 755 | |
| 756 | |
| 757 void FullCodeGenerator::GetVar(Register dest, Variable* var) { | |
| 758 // Use destination as scratch. | |
| 759 MemOperand location = VarOperand(var, dest); | |
| 760 __ lw(dest, location); | |
| 761 } | |
| 762 | |
| 763 | |
| 764 void FullCodeGenerator::SetVar(Variable* var, | |
| 765 Register src, | |
| 766 Register scratch0, | |
| 767 Register scratch1) { | |
| 768 DCHECK(var->IsContextSlot() || var->IsStackAllocated()); | |
| 769 DCHECK(!scratch0.is(src)); | |
| 770 DCHECK(!scratch0.is(scratch1)); | |
| 771 DCHECK(!scratch1.is(src)); | |
| 772 MemOperand location = VarOperand(var, scratch0); | |
| 773 __ sw(src, location); | |
| 774 // Emit the write barrier code if the location is in the heap. | |
| 775 if (var->IsContextSlot()) { | |
| 776 __ RecordWriteContextSlot(scratch0, | |
| 777 location.offset(), | |
| 778 src, | |
| 779 scratch1, | |
| 780 kRAHasBeenSaved, | |
| 781 kDontSaveFPRegs); | |
| 782 } | |
| 783 } | |
| 784 | |
| 785 | |
| 786 void FullCodeGenerator::PrepareForBailoutBeforeSplit(Expression* expr, | |
| 787 bool should_normalize, | |
| 788 Label* if_true, | |
| 789 Label* if_false) { | |
| 790 // Only prepare for bailouts before splits if we're in a test | |
| 791 // context. Otherwise, we let the Visit function deal with the | |
| 792 // preparation to avoid preparing with the same AST id twice. | |
| 793 if (!context()->IsTest() || !info_->IsOptimizable()) return; | |
| 794 | |
| 795 Label skip; | |
| 796 if (should_normalize) __ Branch(&skip); | |
| 797 PrepareForBailout(expr, TOS_REG); | |
| 798 if (should_normalize) { | |
| 799 __ LoadRoot(t0, Heap::kTrueValueRootIndex); | |
| 800 Split(eq, a0, Operand(t0), if_true, if_false, NULL); | |
| 801 __ bind(&skip); | |
| 802 } | |
| 803 } | |
| 804 | |
| 805 | |
| 806 void FullCodeGenerator::EmitDebugCheckDeclarationContext(Variable* variable) { | |
| 807 // The variable in the declaration always resides in the current function | |
| 808 // context. | |
| 809 DCHECK_EQ(0, scope()->ContextChainLength(variable->scope())); | |
| 810 if (generate_debug_code_) { | |
| 811 // Check that we're not inside a with or catch context. | |
| 812 __ lw(a1, FieldMemOperand(cp, HeapObject::kMapOffset)); | |
| 813 __ LoadRoot(t0, Heap::kWithContextMapRootIndex); | |
| 814 __ Check(ne, kDeclarationInWithContext, | |
| 815 a1, Operand(t0)); | |
| 816 __ LoadRoot(t0, Heap::kCatchContextMapRootIndex); | |
| 817 __ Check(ne, kDeclarationInCatchContext, | |
| 818 a1, Operand(t0)); | |
| 819 } | |
| 820 } | |
| 821 | |
| 822 | |
| 823 void FullCodeGenerator::VisitVariableDeclaration( | |
| 824 VariableDeclaration* declaration) { | |
| 825 // If it was not possible to allocate the variable at compile time, we | |
| 826 // need to "declare" it at runtime to make sure it actually exists in the | |
| 827 // local context. | |
| 828 VariableProxy* proxy = declaration->proxy(); | |
| 829 VariableMode mode = declaration->mode(); | |
| 830 Variable* variable = proxy->var(); | |
| 831 bool hole_init = mode == LET || mode == CONST || mode == CONST_LEGACY; | |
| 832 switch (variable->location()) { | |
| 833 case VariableLocation::GLOBAL: | |
| 834 case VariableLocation::UNALLOCATED: | |
| 835 globals_->Add(variable->name(), zone()); | |
| 836 globals_->Add(variable->binding_needs_init() | |
| 837 ? isolate()->factory()->the_hole_value() | |
| 838 : isolate()->factory()->undefined_value(), | |
| 839 zone()); | |
| 840 break; | |
| 841 | |
| 842 case VariableLocation::PARAMETER: | |
| 843 case VariableLocation::LOCAL: | |
| 844 if (hole_init) { | |
| 845 Comment cmnt(masm_, "[ VariableDeclaration"); | |
| 846 __ LoadRoot(t0, Heap::kTheHoleValueRootIndex); | |
| 847 __ sw(t0, StackOperand(variable)); | |
| 848 } | |
| 849 break; | |
| 850 | |
| 851 case VariableLocation::CONTEXT: | |
| 852 if (hole_init) { | |
| 853 Comment cmnt(masm_, "[ VariableDeclaration"); | |
| 854 EmitDebugCheckDeclarationContext(variable); | |
| 855 __ LoadRoot(at, Heap::kTheHoleValueRootIndex); | |
| 856 __ sw(at, ContextOperand(cp, variable->index())); | |
| 857 // No write barrier since the_hole_value is in old space. | |
| 858 PrepareForBailoutForId(proxy->id(), NO_REGISTERS); | |
| 859 } | |
| 860 break; | |
| 861 | |
| 862 case VariableLocation::LOOKUP: { | |
| 863 Comment cmnt(masm_, "[ VariableDeclaration"); | |
| 864 __ li(a2, Operand(variable->name())); | |
| 865 // Declaration nodes are always introduced in one of four modes. | |
| 866 DCHECK(IsDeclaredVariableMode(mode)); | |
| 867 PropertyAttributes attr = | |
| 868 IsImmutableVariableMode(mode) ? READ_ONLY : NONE; | |
| 869 __ li(a1, Operand(Smi::FromInt(attr))); | |
| 870 // Push initial value, if any. | |
| 871 // Note: For variables we must not push an initial value (such as | |
| 872 // 'undefined') because we may have a (legal) redeclaration and we | |
| 873 // must not destroy the current value. | |
| 874 if (hole_init) { | |
| 875 __ LoadRoot(a0, Heap::kTheHoleValueRootIndex); | |
| 876 __ Push(cp, a2, a1, a0); | |
| 877 } else { | |
| 878 DCHECK(Smi::FromInt(0) == 0); | |
| 879 __ mov(a0, zero_reg); // Smi::FromInt(0) indicates no initial value. | |
| 880 __ Push(cp, a2, a1, a0); | |
| 881 } | |
| 882 __ CallRuntime(Runtime::kDeclareLookupSlot, 4); | |
| 883 break; | |
| 884 } | |
| 885 } | |
| 886 } | |
| 887 | |
| 888 | |
| 889 void FullCodeGenerator::VisitFunctionDeclaration( | |
| 890 FunctionDeclaration* declaration) { | |
| 891 VariableProxy* proxy = declaration->proxy(); | |
| 892 Variable* variable = proxy->var(); | |
| 893 switch (variable->location()) { | |
| 894 case VariableLocation::GLOBAL: | |
| 895 case VariableLocation::UNALLOCATED: { | |
| 896 globals_->Add(variable->name(), zone()); | |
| 897 Handle<SharedFunctionInfo> function = | |
| 898 Compiler::GetSharedFunctionInfo(declaration->fun(), script(), info_); | |
| 899 // Check for stack-overflow exception. | |
| 900 if (function.is_null()) return SetStackOverflow(); | |
| 901 globals_->Add(function, zone()); | |
| 902 break; | |
| 903 } | |
| 904 | |
| 905 case VariableLocation::PARAMETER: | |
| 906 case VariableLocation::LOCAL: { | |
| 907 Comment cmnt(masm_, "[ FunctionDeclaration"); | |
| 908 VisitForAccumulatorValue(declaration->fun()); | |
| 909 __ sw(result_register(), StackOperand(variable)); | |
| 910 break; | |
| 911 } | |
| 912 | |
| 913 case VariableLocation::CONTEXT: { | |
| 914 Comment cmnt(masm_, "[ FunctionDeclaration"); | |
| 915 EmitDebugCheckDeclarationContext(variable); | |
| 916 VisitForAccumulatorValue(declaration->fun()); | |
| 917 __ sw(result_register(), ContextOperand(cp, variable->index())); | |
| 918 int offset = Context::SlotOffset(variable->index()); | |
| 919 // We know that we have written a function, which is not a smi. | |
| 920 __ RecordWriteContextSlot(cp, | |
| 921 offset, | |
| 922 result_register(), | |
| 923 a2, | |
| 924 kRAHasBeenSaved, | |
| 925 kDontSaveFPRegs, | |
| 926 EMIT_REMEMBERED_SET, | |
| 927 OMIT_SMI_CHECK); | |
| 928 PrepareForBailoutForId(proxy->id(), NO_REGISTERS); | |
| 929 break; | |
| 930 } | |
| 931 | |
| 932 case VariableLocation::LOOKUP: { | |
| 933 Comment cmnt(masm_, "[ FunctionDeclaration"); | |
| 934 __ li(a2, Operand(variable->name())); | |
| 935 __ li(a1, Operand(Smi::FromInt(NONE))); | |
| 936 __ Push(cp, a2, a1); | |
| 937 // Push initial value for function declaration. | |
| 938 VisitForStackValue(declaration->fun()); | |
| 939 __ CallRuntime(Runtime::kDeclareLookupSlot, 4); | |
| 940 break; | |
| 941 } | |
| 942 } | |
| 943 } | |
| 944 | |
| 945 | |
| 946 void FullCodeGenerator::DeclareGlobals(Handle<FixedArray> pairs) { | |
| 947 // Call the runtime to declare the globals. | |
| 948 // The context is the first argument. | |
| 949 __ li(a1, Operand(pairs)); | |
| 950 __ li(a0, Operand(Smi::FromInt(DeclareGlobalsFlags()))); | |
| 951 __ Push(cp, a1, a0); | |
| 952 __ CallRuntime(Runtime::kDeclareGlobals, 3); | |
| 953 // Return value is ignored. | |
| 954 } | |
| 955 | |
| 956 | |
| 957 void FullCodeGenerator::DeclareModules(Handle<FixedArray> descriptions) { | |
| 958 // Call the runtime to declare the modules. | |
| 959 __ Push(descriptions); | |
| 960 __ CallRuntime(Runtime::kDeclareModules, 1); | |
| 961 // Return value is ignored. | |
| 962 } | |
| 963 | |
| 964 | |
| 965 void FullCodeGenerator::VisitSwitchStatement(SwitchStatement* stmt) { | |
| 966 Comment cmnt(masm_, "[ SwitchStatement"); | |
| 967 Breakable nested_statement(this, stmt); | |
| 968 SetStatementPosition(stmt); | |
| 969 | |
| 970 // Keep the switch value on the stack until a case matches. | |
| 971 VisitForStackValue(stmt->tag()); | |
| 972 PrepareForBailoutForId(stmt->EntryId(), NO_REGISTERS); | |
| 973 | |
| 974 ZoneList<CaseClause*>* clauses = stmt->cases(); | |
| 975 CaseClause* default_clause = NULL; // Can occur anywhere in the list. | |
| 976 | |
| 977 Label next_test; // Recycled for each test. | |
| 978 // Compile all the tests with branches to their bodies. | |
| 979 for (int i = 0; i < clauses->length(); i++) { | |
| 980 CaseClause* clause = clauses->at(i); | |
| 981 clause->body_target()->Unuse(); | |
| 982 | |
| 983 // The default is not a test, but remember it as final fall through. | |
| 984 if (clause->is_default()) { | |
| 985 default_clause = clause; | |
| 986 continue; | |
| 987 } | |
| 988 | |
| 989 Comment cmnt(masm_, "[ Case comparison"); | |
| 990 __ bind(&next_test); | |
| 991 next_test.Unuse(); | |
| 992 | |
| 993 // Compile the label expression. | |
| 994 VisitForAccumulatorValue(clause->label()); | |
| 995 __ mov(a0, result_register()); // CompareStub requires args in a0, a1. | |
| 996 | |
| 997 // Perform the comparison as if via '==='. | |
| 998 __ lw(a1, MemOperand(sp, 0)); // Switch value. | |
| 999 bool inline_smi_code = ShouldInlineSmiCase(Token::EQ_STRICT); | |
| 1000 JumpPatchSite patch_site(masm_); | |
| 1001 if (inline_smi_code) { | |
| 1002 Label slow_case; | |
| 1003 __ or_(a2, a1, a0); | |
| 1004 patch_site.EmitJumpIfNotSmi(a2, &slow_case); | |
| 1005 | |
| 1006 __ Branch(&next_test, ne, a1, Operand(a0)); | |
| 1007 __ Drop(1); // Switch value is no longer needed. | |
| 1008 __ Branch(clause->body_target()); | |
| 1009 | |
| 1010 __ bind(&slow_case); | |
| 1011 } | |
| 1012 | |
| 1013 // Record position before stub call for type feedback. | |
| 1014 SetExpressionPosition(clause); | |
| 1015 Handle<Code> ic = CodeFactory::CompareIC(isolate(), Token::EQ_STRICT, | |
| 1016 strength(language_mode())).code(); | |
| 1017 CallIC(ic, clause->CompareId()); | |
| 1018 patch_site.EmitPatchInfo(); | |
| 1019 | |
| 1020 Label skip; | |
| 1021 __ Branch(&skip); | |
| 1022 PrepareForBailout(clause, TOS_REG); | |
| 1023 __ LoadRoot(at, Heap::kTrueValueRootIndex); | |
| 1024 __ Branch(&next_test, ne, v0, Operand(at)); | |
| 1025 __ Drop(1); | |
| 1026 __ Branch(clause->body_target()); | |
| 1027 __ bind(&skip); | |
| 1028 | |
| 1029 __ Branch(&next_test, ne, v0, Operand(zero_reg)); | |
| 1030 __ Drop(1); // Switch value is no longer needed. | |
| 1031 __ Branch(clause->body_target()); | |
| 1032 } | |
| 1033 | |
| 1034 // Discard the test value and jump to the default if present, otherwise to | |
| 1035 // the end of the statement. | |
| 1036 __ bind(&next_test); | |
| 1037 __ Drop(1); // Switch value is no longer needed. | |
| 1038 if (default_clause == NULL) { | |
| 1039 __ Branch(nested_statement.break_label()); | |
| 1040 } else { | |
| 1041 __ Branch(default_clause->body_target()); | |
| 1042 } | |
| 1043 | |
| 1044 // Compile all the case bodies. | |
| 1045 for (int i = 0; i < clauses->length(); i++) { | |
| 1046 Comment cmnt(masm_, "[ Case body"); | |
| 1047 CaseClause* clause = clauses->at(i); | |
| 1048 __ bind(clause->body_target()); | |
| 1049 PrepareForBailoutForId(clause->EntryId(), NO_REGISTERS); | |
| 1050 VisitStatements(clause->statements()); | |
| 1051 } | |
| 1052 | |
| 1053 __ bind(nested_statement.break_label()); | |
| 1054 PrepareForBailoutForId(stmt->ExitId(), NO_REGISTERS); | |
| 1055 } | |
| 1056 | |
| 1057 | |
| 1058 void FullCodeGenerator::VisitForInStatement(ForInStatement* stmt) { | |
| 1059 Comment cmnt(masm_, "[ ForInStatement"); | |
| 1060 SetStatementPosition(stmt, SKIP_BREAK); | |
| 1061 | |
| 1062 FeedbackVectorSlot slot = stmt->ForInFeedbackSlot(); | |
| 1063 | |
| 1064 Label loop, exit; | |
| 1065 ForIn loop_statement(this, stmt); | |
| 1066 increment_loop_depth(); | |
| 1067 | |
| 1068 // Get the object to enumerate over. If the object is null or undefined, skip | |
| 1069 // over the loop. See ECMA-262 version 5, section 12.6.4. | |
| 1070 SetExpressionAsStatementPosition(stmt->enumerable()); | |
| 1071 VisitForAccumulatorValue(stmt->enumerable()); | |
| 1072 __ mov(a0, result_register()); // Result as param to InvokeBuiltin below. | |
| 1073 __ LoadRoot(at, Heap::kUndefinedValueRootIndex); | |
| 1074 __ Branch(&exit, eq, a0, Operand(at)); | |
| 1075 Register null_value = t1; | |
| 1076 __ LoadRoot(null_value, Heap::kNullValueRootIndex); | |
| 1077 __ Branch(&exit, eq, a0, Operand(null_value)); | |
| 1078 PrepareForBailoutForId(stmt->PrepareId(), TOS_REG); | |
| 1079 __ mov(a0, v0); | |
| 1080 // Convert the object to a JS object. | |
| 1081 Label convert, done_convert; | |
| 1082 __ JumpIfSmi(a0, &convert); | |
| 1083 __ GetObjectType(a0, a1, a1); | |
| 1084 __ Branch(&done_convert, ge, a1, Operand(FIRST_SPEC_OBJECT_TYPE)); | |
| 1085 __ bind(&convert); | |
| 1086 __ push(a0); | |
| 1087 __ InvokeBuiltin(Builtins::TO_OBJECT, CALL_FUNCTION); | |
| 1088 __ mov(a0, v0); | |
| 1089 __ bind(&done_convert); | |
| 1090 PrepareForBailoutForId(stmt->ToObjectId(), TOS_REG); | |
| 1091 __ push(a0); | |
| 1092 | |
| 1093 // Check for proxies. | |
| 1094 Label call_runtime; | |
| 1095 STATIC_ASSERT(FIRST_JS_PROXY_TYPE == FIRST_SPEC_OBJECT_TYPE); | |
| 1096 __ GetObjectType(a0, a1, a1); | |
| 1097 __ Branch(&call_runtime, le, a1, Operand(LAST_JS_PROXY_TYPE)); | |
| 1098 | |
| 1099 // Check cache validity in generated code. This is a fast case for | |
| 1100 // the JSObject::IsSimpleEnum cache validity checks. If we cannot | |
| 1101 // guarantee cache validity, call the runtime system to check cache | |
| 1102 // validity or get the property names in a fixed array. | |
| 1103 __ CheckEnumCache(null_value, &call_runtime); | |
| 1104 | |
| 1105 // The enum cache is valid. Load the map of the object being | |
| 1106 // iterated over and use the cache for the iteration. | |
| 1107 Label use_cache; | |
| 1108 __ lw(v0, FieldMemOperand(a0, HeapObject::kMapOffset)); | |
| 1109 __ Branch(&use_cache); | |
| 1110 | |
| 1111 // Get the set of properties to enumerate. | |
| 1112 __ bind(&call_runtime); | |
| 1113 __ push(a0); // Duplicate the enumerable object on the stack. | |
| 1114 __ CallRuntime(Runtime::kGetPropertyNamesFast, 1); | |
| 1115 PrepareForBailoutForId(stmt->EnumId(), TOS_REG); | |
| 1116 | |
| 1117 // If we got a map from the runtime call, we can do a fast | |
| 1118 // modification check. Otherwise, we got a fixed array, and we have | |
| 1119 // to do a slow check. | |
| 1120 Label fixed_array; | |
| 1121 __ lw(a2, FieldMemOperand(v0, HeapObject::kMapOffset)); | |
| 1122 __ LoadRoot(at, Heap::kMetaMapRootIndex); | |
| 1123 __ Branch(&fixed_array, ne, a2, Operand(at)); | |
| 1124 | |
| 1125 // We got a map in register v0. Get the enumeration cache from it. | |
| 1126 Label no_descriptors; | |
| 1127 __ bind(&use_cache); | |
| 1128 | |
| 1129 __ EnumLength(a1, v0); | |
| 1130 __ Branch(&no_descriptors, eq, a1, Operand(Smi::FromInt(0))); | |
| 1131 | |
| 1132 __ LoadInstanceDescriptors(v0, a2); | |
| 1133 __ lw(a2, FieldMemOperand(a2, DescriptorArray::kEnumCacheOffset)); | |
| 1134 __ lw(a2, FieldMemOperand(a2, DescriptorArray::kEnumCacheBridgeCacheOffset)); | |
| 1135 | |
| 1136 // Set up the four remaining stack slots. | |
| 1137 __ li(a0, Operand(Smi::FromInt(0))); | |
| 1138 // Push map, enumeration cache, enumeration cache length (as smi) and zero. | |
| 1139 __ Push(v0, a2, a1, a0); | |
| 1140 __ jmp(&loop); | |
| 1141 | |
| 1142 __ bind(&no_descriptors); | |
| 1143 __ Drop(1); | |
| 1144 __ jmp(&exit); | |
| 1145 | |
| 1146 // We got a fixed array in register v0. Iterate through that. | |
| 1147 Label non_proxy; | |
| 1148 __ bind(&fixed_array); | |
| 1149 | |
| 1150 __ li(a1, FeedbackVector()); | |
| 1151 __ li(a2, Operand(TypeFeedbackVector::MegamorphicSentinel(isolate()))); | |
| 1152 int vector_index = FeedbackVector()->GetIndex(slot); | |
| 1153 __ sw(a2, FieldMemOperand(a1, FixedArray::OffsetOfElementAt(vector_index))); | |
| 1154 | |
| 1155 __ li(a1, Operand(Smi::FromInt(1))); // Smi indicates slow check | |
| 1156 __ lw(a2, MemOperand(sp, 0 * kPointerSize)); // Get enumerated object | |
| 1157 STATIC_ASSERT(FIRST_JS_PROXY_TYPE == FIRST_SPEC_OBJECT_TYPE); | |
| 1158 __ GetObjectType(a2, a3, a3); | |
| 1159 __ Branch(&non_proxy, gt, a3, Operand(LAST_JS_PROXY_TYPE)); | |
| 1160 __ li(a1, Operand(Smi::FromInt(0))); // Zero indicates proxy | |
| 1161 __ bind(&non_proxy); | |
| 1162 __ Push(a1, v0); // Smi and array | |
| 1163 __ lw(a1, FieldMemOperand(v0, FixedArray::kLengthOffset)); | |
| 1164 __ li(a0, Operand(Smi::FromInt(0))); | |
| 1165 __ Push(a1, a0); // Fixed array length (as smi) and initial index. | |
| 1166 | |
| 1167 // Generate code for doing the condition check. | |
| 1168 PrepareForBailoutForId(stmt->BodyId(), NO_REGISTERS); | |
| 1169 __ bind(&loop); | |
| 1170 SetExpressionAsStatementPosition(stmt->each()); | |
| 1171 | |
| 1172 // Load the current count to a0, load the length to a1. | |
| 1173 __ lw(a0, MemOperand(sp, 0 * kPointerSize)); | |
| 1174 __ lw(a1, MemOperand(sp, 1 * kPointerSize)); | |
| 1175 __ Branch(loop_statement.break_label(), hs, a0, Operand(a1)); | |
| 1176 | |
| 1177 // Get the current entry of the array into register a3. | |
| 1178 __ lw(a2, MemOperand(sp, 2 * kPointerSize)); | |
| 1179 __ Addu(a2, a2, Operand(FixedArray::kHeaderSize - kHeapObjectTag)); | |
| 1180 __ sll(t0, a0, kPointerSizeLog2 - kSmiTagSize); | |
| 1181 __ addu(t0, a2, t0); // Array base + scaled (smi) index. | |
| 1182 __ lw(a3, MemOperand(t0)); // Current entry. | |
| 1183 | |
| 1184 // Get the expected map from the stack or a smi in the | |
| 1185 // permanent slow case into register a2. | |
| 1186 __ lw(a2, MemOperand(sp, 3 * kPointerSize)); | |
| 1187 | |
| 1188 // Check if the expected map still matches that of the enumerable. | |
| 1189 // If not, we may have to filter the key. | |
| 1190 Label update_each; | |
| 1191 __ lw(a1, MemOperand(sp, 4 * kPointerSize)); | |
| 1192 __ lw(t0, FieldMemOperand(a1, HeapObject::kMapOffset)); | |
| 1193 __ Branch(&update_each, eq, t0, Operand(a2)); | |
| 1194 | |
| 1195 // For proxies, no filtering is done. | |
| 1196 // TODO(rossberg): What if only a prototype is a proxy? Not specified yet. | |
| 1197 DCHECK_EQ(static_cast<Smi*>(0), Smi::FromInt(0)); | |
| 1198 __ Branch(&update_each, eq, a2, Operand(zero_reg)); | |
| 1199 | |
| 1200 // Convert the entry to a string or (smi) 0 if it isn't a property | |
| 1201 // any more. If the property has been removed while iterating, we | |
| 1202 // just skip it. | |
| 1203 __ Push(a1, a3); // Enumerable and current entry. | |
| 1204 __ CallRuntime(Runtime::kForInFilter, 2); | |
| 1205 PrepareForBailoutForId(stmt->FilterId(), TOS_REG); | |
| 1206 __ mov(a3, result_register()); | |
| 1207 __ LoadRoot(at, Heap::kUndefinedValueRootIndex); | |
| 1208 __ Branch(loop_statement.continue_label(), eq, a3, Operand(at)); | |
| 1209 | |
| 1210 // Update the 'each' property or variable from the possibly filtered | |
| 1211 // entry in register a3. | |
| 1212 __ bind(&update_each); | |
| 1213 __ mov(result_register(), a3); | |
| 1214 // Perform the assignment as if via '='. | |
| 1215 { EffectContext context(this); | |
| 1216 EmitAssignment(stmt->each(), stmt->EachFeedbackSlot()); | |
| 1217 PrepareForBailoutForId(stmt->AssignmentId(), NO_REGISTERS); | |
| 1218 } | |
| 1219 | |
| 1220 // Generate code for the body of the loop. | |
| 1221 Visit(stmt->body()); | |
| 1222 | |
| 1223 // Generate code for the going to the next element by incrementing | |
| 1224 // the index (smi) stored on top of the stack. | |
| 1225 __ bind(loop_statement.continue_label()); | |
| 1226 __ pop(a0); | |
| 1227 __ Addu(a0, a0, Operand(Smi::FromInt(1))); | |
| 1228 __ push(a0); | |
| 1229 | |
| 1230 EmitBackEdgeBookkeeping(stmt, &loop); | |
| 1231 __ Branch(&loop); | |
| 1232 | |
| 1233 // Remove the pointers stored on the stack. | |
| 1234 __ bind(loop_statement.break_label()); | |
| 1235 __ Drop(5); | |
| 1236 | |
| 1237 // Exit and decrement the loop depth. | |
| 1238 PrepareForBailoutForId(stmt->ExitId(), NO_REGISTERS); | |
| 1239 __ bind(&exit); | |
| 1240 decrement_loop_depth(); | |
| 1241 } | |
| 1242 | |
| 1243 | |
| 1244 void FullCodeGenerator::EmitNewClosure(Handle<SharedFunctionInfo> info, | |
| 1245 bool pretenure) { | |
| 1246 // Use the fast case closure allocation code that allocates in new | |
| 1247 // space for nested functions that don't need literals cloning. If | |
| 1248 // we're running with the --always-opt or the --prepare-always-opt | |
| 1249 // flag, we need to use the runtime function so that the new function | |
| 1250 // we are creating here gets a chance to have its code optimized and | |
| 1251 // doesn't just get a copy of the existing unoptimized code. | |
| 1252 if (!FLAG_always_opt && | |
| 1253 !FLAG_prepare_always_opt && | |
| 1254 !pretenure && | |
| 1255 scope()->is_function_scope() && | |
| 1256 info->num_literals() == 0) { | |
| 1257 FastNewClosureStub stub(isolate(), info->language_mode(), info->kind()); | |
| 1258 __ li(a2, Operand(info)); | |
| 1259 __ CallStub(&stub); | |
| 1260 } else { | |
| 1261 __ li(a0, Operand(info)); | |
| 1262 __ LoadRoot(a1, pretenure ? Heap::kTrueValueRootIndex | |
| 1263 : Heap::kFalseValueRootIndex); | |
| 1264 __ Push(cp, a0, a1); | |
| 1265 __ CallRuntime(Runtime::kNewClosure, 3); | |
| 1266 } | |
| 1267 context()->Plug(v0); | |
| 1268 } | |
| 1269 | |
| 1270 | |
| 1271 void FullCodeGenerator::EmitSetHomeObjectIfNeeded(Expression* initializer, | |
| 1272 int offset, | |
| 1273 FeedbackVectorICSlot slot) { | |
| 1274 if (NeedsHomeObject(initializer)) { | |
| 1275 __ lw(StoreDescriptor::ReceiverRegister(), MemOperand(sp)); | |
| 1276 __ li(StoreDescriptor::NameRegister(), | |
| 1277 Operand(isolate()->factory()->home_object_symbol())); | |
| 1278 __ lw(StoreDescriptor::ValueRegister(), | |
| 1279 MemOperand(sp, offset * kPointerSize)); | |
| 1280 if (FLAG_vector_stores) EmitLoadStoreICSlot(slot); | |
| 1281 CallStoreIC(); | |
| 1282 } | |
| 1283 } | |
| 1284 | |
| 1285 | |
| 1286 void FullCodeGenerator::EmitLoadGlobalCheckExtensions(VariableProxy* proxy, | |
| 1287 TypeofMode typeof_mode, | |
| 1288 Label* slow) { | |
| 1289 Register current = cp; | |
| 1290 Register next = a1; | |
| 1291 Register temp = a2; | |
| 1292 | |
| 1293 Scope* s = scope(); | |
| 1294 while (s != NULL) { | |
| 1295 if (s->num_heap_slots() > 0) { | |
| 1296 if (s->calls_sloppy_eval()) { | |
| 1297 // Check that extension is NULL. | |
| 1298 __ lw(temp, ContextOperand(current, Context::EXTENSION_INDEX)); | |
| 1299 __ Branch(slow, ne, temp, Operand(zero_reg)); | |
| 1300 } | |
| 1301 // Load next context in chain. | |
| 1302 __ lw(next, ContextOperand(current, Context::PREVIOUS_INDEX)); | |
| 1303 // Walk the rest of the chain without clobbering cp. | |
| 1304 current = next; | |
| 1305 } | |
| 1306 // If no outer scope calls eval, we do not need to check more | |
| 1307 // context extensions. | |
| 1308 if (!s->outer_scope_calls_sloppy_eval() || s->is_eval_scope()) break; | |
| 1309 s = s->outer_scope(); | |
| 1310 } | |
| 1311 | |
| 1312 if (s->is_eval_scope()) { | |
| 1313 Label loop, fast; | |
| 1314 if (!current.is(next)) { | |
| 1315 __ Move(next, current); | |
| 1316 } | |
| 1317 __ bind(&loop); | |
| 1318 // Terminate at native context. | |
| 1319 __ lw(temp, FieldMemOperand(next, HeapObject::kMapOffset)); | |
| 1320 __ LoadRoot(t0, Heap::kNativeContextMapRootIndex); | |
| 1321 __ Branch(&fast, eq, temp, Operand(t0)); | |
| 1322 // Check that extension is NULL. | |
| 1323 __ lw(temp, ContextOperand(next, Context::EXTENSION_INDEX)); | |
| 1324 __ Branch(slow, ne, temp, Operand(zero_reg)); | |
| 1325 // Load next context in chain. | |
| 1326 __ lw(next, ContextOperand(next, Context::PREVIOUS_INDEX)); | |
| 1327 __ Branch(&loop); | |
| 1328 __ bind(&fast); | |
| 1329 } | |
| 1330 | |
| 1331 // All extension objects were empty and it is safe to use a normal global | |
| 1332 // load machinery. | |
| 1333 EmitGlobalVariableLoad(proxy, typeof_mode); | |
| 1334 } | |
| 1335 | |
| 1336 | |
| 1337 MemOperand FullCodeGenerator::ContextSlotOperandCheckExtensions(Variable* var, | |
| 1338 Label* slow) { | |
| 1339 DCHECK(var->IsContextSlot()); | |
| 1340 Register context = cp; | |
| 1341 Register next = a3; | |
| 1342 Register temp = t0; | |
| 1343 | |
| 1344 for (Scope* s = scope(); s != var->scope(); s = s->outer_scope()) { | |
| 1345 if (s->num_heap_slots() > 0) { | |
| 1346 if (s->calls_sloppy_eval()) { | |
| 1347 // Check that extension is NULL. | |
| 1348 __ lw(temp, ContextOperand(context, Context::EXTENSION_INDEX)); | |
| 1349 __ Branch(slow, ne, temp, Operand(zero_reg)); | |
| 1350 } | |
| 1351 __ lw(next, ContextOperand(context, Context::PREVIOUS_INDEX)); | |
| 1352 // Walk the rest of the chain without clobbering cp. | |
| 1353 context = next; | |
| 1354 } | |
| 1355 } | |
| 1356 // Check that last extension is NULL. | |
| 1357 __ lw(temp, ContextOperand(context, Context::EXTENSION_INDEX)); | |
| 1358 __ Branch(slow, ne, temp, Operand(zero_reg)); | |
| 1359 | |
| 1360 // This function is used only for loads, not stores, so it's safe to | |
| 1361 // return an cp-based operand (the write barrier cannot be allowed to | |
| 1362 // destroy the cp register). | |
| 1363 return ContextOperand(context, var->index()); | |
| 1364 } | |
| 1365 | |
| 1366 | |
| 1367 void FullCodeGenerator::EmitDynamicLookupFastCase(VariableProxy* proxy, | |
| 1368 TypeofMode typeof_mode, | |
| 1369 Label* slow, Label* done) { | |
| 1370 // Generate fast-case code for variables that might be shadowed by | |
| 1371 // eval-introduced variables. Eval is used a lot without | |
| 1372 // introducing variables. In those cases, we do not want to | |
| 1373 // perform a runtime call for all variables in the scope | |
| 1374 // containing the eval. | |
| 1375 Variable* var = proxy->var(); | |
| 1376 if (var->mode() == DYNAMIC_GLOBAL) { | |
| 1377 EmitLoadGlobalCheckExtensions(proxy, typeof_mode, slow); | |
| 1378 __ Branch(done); | |
| 1379 } else if (var->mode() == DYNAMIC_LOCAL) { | |
| 1380 Variable* local = var->local_if_not_shadowed(); | |
| 1381 __ lw(v0, ContextSlotOperandCheckExtensions(local, slow)); | |
| 1382 if (local->mode() == LET || local->mode() == CONST || | |
| 1383 local->mode() == CONST_LEGACY) { | |
| 1384 __ LoadRoot(at, Heap::kTheHoleValueRootIndex); | |
| 1385 __ subu(at, v0, at); // Sub as compare: at == 0 on eq. | |
| 1386 if (local->mode() == CONST_LEGACY) { | |
| 1387 __ LoadRoot(a0, Heap::kUndefinedValueRootIndex); | |
| 1388 __ Movz(v0, a0, at); // Conditional move: return Undefined if TheHole. | |
| 1389 } else { // LET || CONST | |
| 1390 __ Branch(done, ne, at, Operand(zero_reg)); | |
| 1391 __ li(a0, Operand(var->name())); | |
| 1392 __ push(a0); | |
| 1393 __ CallRuntime(Runtime::kThrowReferenceError, 1); | |
| 1394 } | |
| 1395 } | |
| 1396 __ Branch(done); | |
| 1397 } | |
| 1398 } | |
| 1399 | |
| 1400 | |
| 1401 void FullCodeGenerator::EmitGlobalVariableLoad(VariableProxy* proxy, | |
| 1402 TypeofMode typeof_mode) { | |
| 1403 Variable* var = proxy->var(); | |
| 1404 DCHECK(var->IsUnallocatedOrGlobalSlot() || | |
| 1405 (var->IsLookupSlot() && var->mode() == DYNAMIC_GLOBAL)); | |
| 1406 if (var->IsGlobalSlot()) { | |
| 1407 DCHECK(var->index() > 0); | |
| 1408 DCHECK(var->IsStaticGlobalObjectProperty()); | |
| 1409 // Each var occupies two slots in the context: for reads and writes. | |
| 1410 int slot_index = var->index(); | |
| 1411 int depth = scope()->ContextChainLength(var->scope()); | |
| 1412 __ li(LoadGlobalViaContextDescriptor::DepthRegister(), | |
| 1413 Operand(Smi::FromInt(depth))); | |
| 1414 __ li(LoadGlobalViaContextDescriptor::SlotRegister(), | |
| 1415 Operand(Smi::FromInt(slot_index))); | |
| 1416 __ li(LoadGlobalViaContextDescriptor::NameRegister(), Operand(var->name())); | |
| 1417 LoadGlobalViaContextStub stub(isolate(), depth); | |
| 1418 __ CallStub(&stub); | |
| 1419 | |
| 1420 } else { | |
| 1421 __ lw(LoadDescriptor::ReceiverRegister(), GlobalObjectOperand()); | |
| 1422 __ li(LoadDescriptor::NameRegister(), Operand(var->name())); | |
| 1423 __ li(LoadDescriptor::SlotRegister(), | |
| 1424 Operand(SmiFromSlot(proxy->VariableFeedbackSlot()))); | |
| 1425 CallLoadIC(typeof_mode); | |
| 1426 } | |
| 1427 } | |
| 1428 | |
| 1429 | |
| 1430 void FullCodeGenerator::EmitVariableLoad(VariableProxy* proxy, | |
| 1431 TypeofMode typeof_mode) { | |
| 1432 // Record position before possible IC call. | |
| 1433 SetExpressionPosition(proxy); | |
| 1434 PrepareForBailoutForId(proxy->BeforeId(), NO_REGISTERS); | |
| 1435 Variable* var = proxy->var(); | |
| 1436 | |
| 1437 // Three cases: global variables, lookup variables, and all other types of | |
| 1438 // variables. | |
| 1439 switch (var->location()) { | |
| 1440 case VariableLocation::GLOBAL: | |
| 1441 case VariableLocation::UNALLOCATED: { | |
| 1442 Comment cmnt(masm_, "[ Global variable"); | |
| 1443 EmitGlobalVariableLoad(proxy, typeof_mode); | |
| 1444 context()->Plug(v0); | |
| 1445 break; | |
| 1446 } | |
| 1447 | |
| 1448 case VariableLocation::PARAMETER: | |
| 1449 case VariableLocation::LOCAL: | |
| 1450 case VariableLocation::CONTEXT: { | |
| 1451 DCHECK_EQ(NOT_INSIDE_TYPEOF, typeof_mode); | |
| 1452 Comment cmnt(masm_, var->IsContextSlot() ? "[ Context variable" | |
| 1453 : "[ Stack variable"); | |
| 1454 if (var->binding_needs_init()) { | |
| 1455 // var->scope() may be NULL when the proxy is located in eval code and | |
| 1456 // refers to a potential outside binding. Currently those bindings are | |
| 1457 // always looked up dynamically, i.e. in that case | |
| 1458 // var->location() == LOOKUP. | |
| 1459 // always holds. | |
| 1460 DCHECK(var->scope() != NULL); | |
| 1461 | |
| 1462 // Check if the binding really needs an initialization check. The check | |
| 1463 // can be skipped in the following situation: we have a LET or CONST | |
| 1464 // binding in harmony mode, both the Variable and the VariableProxy have | |
| 1465 // the same declaration scope (i.e. they are both in global code, in the | |
| 1466 // same function or in the same eval code) and the VariableProxy is in | |
| 1467 // the source physically located after the initializer of the variable. | |
| 1468 // | |
| 1469 // We cannot skip any initialization checks for CONST in non-harmony | |
| 1470 // mode because const variables may be declared but never initialized: | |
| 1471 // if (false) { const x; }; var y = x; | |
| 1472 // | |
| 1473 // The condition on the declaration scopes is a conservative check for | |
| 1474 // nested functions that access a binding and are called before the | |
| 1475 // binding is initialized: | |
| 1476 // function() { f(); let x = 1; function f() { x = 2; } } | |
| 1477 // | |
| 1478 bool skip_init_check; | |
| 1479 if (var->scope()->DeclarationScope() != scope()->DeclarationScope()) { | |
| 1480 skip_init_check = false; | |
| 1481 } else if (var->is_this()) { | |
| 1482 CHECK(info_->function() != nullptr && | |
| 1483 (info_->function()->kind() & kSubclassConstructor) != 0); | |
| 1484 // TODO(dslomov): implement 'this' hole check elimination. | |
| 1485 skip_init_check = false; | |
| 1486 } else { | |
| 1487 // Check that we always have valid source position. | |
| 1488 DCHECK(var->initializer_position() != RelocInfo::kNoPosition); | |
| 1489 DCHECK(proxy->position() != RelocInfo::kNoPosition); | |
| 1490 skip_init_check = var->mode() != CONST_LEGACY && | |
| 1491 var->initializer_position() < proxy->position(); | |
| 1492 } | |
| 1493 | |
| 1494 if (!skip_init_check) { | |
| 1495 // Let and const need a read barrier. | |
| 1496 GetVar(v0, var); | |
| 1497 __ LoadRoot(at, Heap::kTheHoleValueRootIndex); | |
| 1498 __ subu(at, v0, at); // Sub as compare: at == 0 on eq. | |
| 1499 if (var->mode() == LET || var->mode() == CONST) { | |
| 1500 // Throw a reference error when using an uninitialized let/const | |
| 1501 // binding in harmony mode. | |
| 1502 Label done; | |
| 1503 __ Branch(&done, ne, at, Operand(zero_reg)); | |
| 1504 __ li(a0, Operand(var->name())); | |
| 1505 __ push(a0); | |
| 1506 __ CallRuntime(Runtime::kThrowReferenceError, 1); | |
| 1507 __ bind(&done); | |
| 1508 } else { | |
| 1509 // Uninitalized const bindings outside of harmony mode are unholed. | |
| 1510 DCHECK(var->mode() == CONST_LEGACY); | |
| 1511 __ LoadRoot(a0, Heap::kUndefinedValueRootIndex); | |
| 1512 __ Movz(v0, a0, at); // Conditional move: Undefined if TheHole. | |
| 1513 } | |
| 1514 context()->Plug(v0); | |
| 1515 break; | |
| 1516 } | |
| 1517 } | |
| 1518 context()->Plug(var); | |
| 1519 break; | |
| 1520 } | |
| 1521 | |
| 1522 case VariableLocation::LOOKUP: { | |
| 1523 Comment cmnt(masm_, "[ Lookup variable"); | |
| 1524 Label done, slow; | |
| 1525 // Generate code for loading from variables potentially shadowed | |
| 1526 // by eval-introduced variables. | |
| 1527 EmitDynamicLookupFastCase(proxy, typeof_mode, &slow, &done); | |
| 1528 __ bind(&slow); | |
| 1529 __ li(a1, Operand(var->name())); | |
| 1530 __ Push(cp, a1); // Context and name. | |
| 1531 Runtime::FunctionId function_id = | |
| 1532 typeof_mode == NOT_INSIDE_TYPEOF | |
| 1533 ? Runtime::kLoadLookupSlot | |
| 1534 : Runtime::kLoadLookupSlotNoReferenceError; | |
| 1535 __ CallRuntime(function_id, 2); | |
| 1536 __ bind(&done); | |
| 1537 context()->Plug(v0); | |
| 1538 } | |
| 1539 } | |
| 1540 } | |
| 1541 | |
| 1542 | |
| 1543 void FullCodeGenerator::VisitRegExpLiteral(RegExpLiteral* expr) { | |
| 1544 Comment cmnt(masm_, "[ RegExpLiteral"); | |
| 1545 Label materialized; | |
| 1546 // Registers will be used as follows: | |
| 1547 // t1 = materialized value (RegExp literal) | |
| 1548 // t0 = JS function, literals array | |
| 1549 // a3 = literal index | |
| 1550 // a2 = RegExp pattern | |
| 1551 // a1 = RegExp flags | |
| 1552 // a0 = RegExp literal clone | |
| 1553 __ lw(a0, MemOperand(fp, JavaScriptFrameConstants::kFunctionOffset)); | |
| 1554 __ lw(t0, FieldMemOperand(a0, JSFunction::kLiteralsOffset)); | |
| 1555 int literal_offset = | |
| 1556 FixedArray::kHeaderSize + expr->literal_index() * kPointerSize; | |
| 1557 __ lw(t1, FieldMemOperand(t0, literal_offset)); | |
| 1558 __ LoadRoot(at, Heap::kUndefinedValueRootIndex); | |
| 1559 __ Branch(&materialized, ne, t1, Operand(at)); | |
| 1560 | |
| 1561 // Create regexp literal using runtime function. | |
| 1562 // Result will be in v0. | |
| 1563 __ li(a3, Operand(Smi::FromInt(expr->literal_index()))); | |
| 1564 __ li(a2, Operand(expr->pattern())); | |
| 1565 __ li(a1, Operand(expr->flags())); | |
| 1566 __ Push(t0, a3, a2, a1); | |
| 1567 __ CallRuntime(Runtime::kMaterializeRegExpLiteral, 4); | |
| 1568 __ mov(t1, v0); | |
| 1569 | |
| 1570 __ bind(&materialized); | |
| 1571 int size = JSRegExp::kSize + JSRegExp::kInObjectFieldCount * kPointerSize; | |
| 1572 Label allocated, runtime_allocate; | |
| 1573 __ Allocate(size, v0, a2, a3, &runtime_allocate, TAG_OBJECT); | |
| 1574 __ jmp(&allocated); | |
| 1575 | |
| 1576 __ bind(&runtime_allocate); | |
| 1577 __ li(a0, Operand(Smi::FromInt(size))); | |
| 1578 __ Push(t1, a0); | |
| 1579 __ CallRuntime(Runtime::kAllocateInNewSpace, 1); | |
| 1580 __ pop(t1); | |
| 1581 | |
| 1582 __ bind(&allocated); | |
| 1583 | |
| 1584 // After this, registers are used as follows: | |
| 1585 // v0: Newly allocated regexp. | |
| 1586 // t1: Materialized regexp. | |
| 1587 // a2: temp. | |
| 1588 __ CopyFields(v0, t1, a2.bit(), size / kPointerSize); | |
| 1589 context()->Plug(v0); | |
| 1590 } | |
| 1591 | |
| 1592 | |
| 1593 void FullCodeGenerator::EmitAccessor(Expression* expression) { | |
| 1594 if (expression == NULL) { | |
| 1595 __ LoadRoot(a1, Heap::kNullValueRootIndex); | |
| 1596 __ push(a1); | |
| 1597 } else { | |
| 1598 VisitForStackValue(expression); | |
| 1599 } | |
| 1600 } | |
| 1601 | |
| 1602 | |
| 1603 void FullCodeGenerator::VisitObjectLiteral(ObjectLiteral* expr) { | |
| 1604 Comment cmnt(masm_, "[ ObjectLiteral"); | |
| 1605 | |
| 1606 Handle<FixedArray> constant_properties = expr->constant_properties(); | |
| 1607 __ lw(a3, MemOperand(fp, JavaScriptFrameConstants::kFunctionOffset)); | |
| 1608 __ lw(a3, FieldMemOperand(a3, JSFunction::kLiteralsOffset)); | |
| 1609 __ li(a2, Operand(Smi::FromInt(expr->literal_index()))); | |
| 1610 __ li(a1, Operand(constant_properties)); | |
| 1611 __ li(a0, Operand(Smi::FromInt(expr->ComputeFlags()))); | |
| 1612 if (MustCreateObjectLiteralWithRuntime(expr)) { | |
| 1613 __ Push(a3, a2, a1, a0); | |
| 1614 __ CallRuntime(Runtime::kCreateObjectLiteral, 4); | |
| 1615 } else { | |
| 1616 FastCloneShallowObjectStub stub(isolate(), expr->properties_count()); | |
| 1617 __ CallStub(&stub); | |
| 1618 } | |
| 1619 PrepareForBailoutForId(expr->CreateLiteralId(), TOS_REG); | |
| 1620 | |
| 1621 // If result_saved is true the result is on top of the stack. If | |
| 1622 // result_saved is false the result is in v0. | |
| 1623 bool result_saved = false; | |
| 1624 | |
| 1625 AccessorTable accessor_table(zone()); | |
| 1626 int property_index = 0; | |
| 1627 // store_slot_index points to the vector IC slot for the next store IC used. | |
| 1628 // ObjectLiteral::ComputeFeedbackRequirements controls the allocation of slots | |
| 1629 // and must be updated if the number of store ICs emitted here changes. | |
| 1630 int store_slot_index = 0; | |
| 1631 for (; property_index < expr->properties()->length(); property_index++) { | |
| 1632 ObjectLiteral::Property* property = expr->properties()->at(property_index); | |
| 1633 if (property->is_computed_name()) break; | |
| 1634 if (property->IsCompileTimeValue()) continue; | |
| 1635 | |
| 1636 Literal* key = property->key()->AsLiteral(); | |
| 1637 Expression* value = property->value(); | |
| 1638 if (!result_saved) { | |
| 1639 __ push(v0); // Save result on stack. | |
| 1640 result_saved = true; | |
| 1641 } | |
| 1642 switch (property->kind()) { | |
| 1643 case ObjectLiteral::Property::CONSTANT: | |
| 1644 UNREACHABLE(); | |
| 1645 case ObjectLiteral::Property::MATERIALIZED_LITERAL: | |
| 1646 DCHECK(!CompileTimeValue::IsCompileTimeValue(property->value())); | |
| 1647 // Fall through. | |
| 1648 case ObjectLiteral::Property::COMPUTED: | |
| 1649 // It is safe to use [[Put]] here because the boilerplate already | |
| 1650 // contains computed properties with an uninitialized value. | |
| 1651 if (key->value()->IsInternalizedString()) { | |
| 1652 if (property->emit_store()) { | |
| 1653 VisitForAccumulatorValue(value); | |
| 1654 __ mov(StoreDescriptor::ValueRegister(), result_register()); | |
| 1655 DCHECK(StoreDescriptor::ValueRegister().is(a0)); | |
| 1656 __ li(StoreDescriptor::NameRegister(), Operand(key->value())); | |
| 1657 __ lw(StoreDescriptor::ReceiverRegister(), MemOperand(sp)); | |
| 1658 if (FLAG_vector_stores) { | |
| 1659 EmitLoadStoreICSlot(expr->GetNthSlot(store_slot_index++)); | |
| 1660 CallStoreIC(); | |
| 1661 } else { | |
| 1662 CallStoreIC(key->LiteralFeedbackId()); | |
| 1663 } | |
| 1664 PrepareForBailoutForId(key->id(), NO_REGISTERS); | |
| 1665 | |
| 1666 if (NeedsHomeObject(value)) { | |
| 1667 __ Move(StoreDescriptor::ReceiverRegister(), v0); | |
| 1668 __ li(StoreDescriptor::NameRegister(), | |
| 1669 Operand(isolate()->factory()->home_object_symbol())); | |
| 1670 __ lw(StoreDescriptor::ValueRegister(), MemOperand(sp)); | |
| 1671 if (FLAG_vector_stores) { | |
| 1672 EmitLoadStoreICSlot(expr->GetNthSlot(store_slot_index++)); | |
| 1673 } | |
| 1674 CallStoreIC(); | |
| 1675 } | |
| 1676 } else { | |
| 1677 VisitForEffect(value); | |
| 1678 } | |
| 1679 break; | |
| 1680 } | |
| 1681 // Duplicate receiver on stack. | |
| 1682 __ lw(a0, MemOperand(sp)); | |
| 1683 __ push(a0); | |
| 1684 VisitForStackValue(key); | |
| 1685 VisitForStackValue(value); | |
| 1686 if (property->emit_store()) { | |
| 1687 EmitSetHomeObjectIfNeeded( | |
| 1688 value, 2, expr->SlotForHomeObject(value, &store_slot_index)); | |
| 1689 __ li(a0, Operand(Smi::FromInt(SLOPPY))); // PropertyAttributes. | |
| 1690 __ push(a0); | |
| 1691 __ CallRuntime(Runtime::kSetProperty, 4); | |
| 1692 } else { | |
| 1693 __ Drop(3); | |
| 1694 } | |
| 1695 break; | |
| 1696 case ObjectLiteral::Property::PROTOTYPE: | |
| 1697 // Duplicate receiver on stack. | |
| 1698 __ lw(a0, MemOperand(sp)); | |
| 1699 __ push(a0); | |
| 1700 VisitForStackValue(value); | |
| 1701 DCHECK(property->emit_store()); | |
| 1702 __ CallRuntime(Runtime::kInternalSetPrototype, 2); | |
| 1703 break; | |
| 1704 case ObjectLiteral::Property::GETTER: | |
| 1705 if (property->emit_store()) { | |
| 1706 accessor_table.lookup(key)->second->getter = value; | |
| 1707 } | |
| 1708 break; | |
| 1709 case ObjectLiteral::Property::SETTER: | |
| 1710 if (property->emit_store()) { | |
| 1711 accessor_table.lookup(key)->second->setter = value; | |
| 1712 } | |
| 1713 break; | |
| 1714 } | |
| 1715 } | |
| 1716 | |
| 1717 // Emit code to define accessors, using only a single call to the runtime for | |
| 1718 // each pair of corresponding getters and setters. | |
| 1719 for (AccessorTable::Iterator it = accessor_table.begin(); | |
| 1720 it != accessor_table.end(); | |
| 1721 ++it) { | |
| 1722 __ lw(a0, MemOperand(sp)); // Duplicate receiver. | |
| 1723 __ push(a0); | |
| 1724 VisitForStackValue(it->first); | |
| 1725 EmitAccessor(it->second->getter); | |
| 1726 EmitSetHomeObjectIfNeeded( | |
| 1727 it->second->getter, 2, | |
| 1728 expr->SlotForHomeObject(it->second->getter, &store_slot_index)); | |
| 1729 EmitAccessor(it->second->setter); | |
| 1730 EmitSetHomeObjectIfNeeded( | |
| 1731 it->second->setter, 3, | |
| 1732 expr->SlotForHomeObject(it->second->setter, &store_slot_index)); | |
| 1733 __ li(a0, Operand(Smi::FromInt(NONE))); | |
| 1734 __ push(a0); | |
| 1735 __ CallRuntime(Runtime::kDefineAccessorPropertyUnchecked, 5); | |
| 1736 } | |
| 1737 | |
| 1738 // Object literals have two parts. The "static" part on the left contains no | |
| 1739 // computed property names, and so we can compute its map ahead of time; see | |
| 1740 // runtime.cc::CreateObjectLiteralBoilerplate. The second "dynamic" part | |
| 1741 // starts with the first computed property name, and continues with all | |
| 1742 // properties to its right. All the code from above initializes the static | |
| 1743 // component of the object literal, and arranges for the map of the result to | |
| 1744 // reflect the static order in which the keys appear. For the dynamic | |
| 1745 // properties, we compile them into a series of "SetOwnProperty" runtime | |
| 1746 // calls. This will preserve insertion order. | |
| 1747 for (; property_index < expr->properties()->length(); property_index++) { | |
| 1748 ObjectLiteral::Property* property = expr->properties()->at(property_index); | |
| 1749 | |
| 1750 Expression* value = property->value(); | |
| 1751 if (!result_saved) { | |
| 1752 __ push(v0); // Save result on the stack | |
| 1753 result_saved = true; | |
| 1754 } | |
| 1755 | |
| 1756 __ lw(a0, MemOperand(sp)); // Duplicate receiver. | |
| 1757 __ push(a0); | |
| 1758 | |
| 1759 if (property->kind() == ObjectLiteral::Property::PROTOTYPE) { | |
| 1760 DCHECK(!property->is_computed_name()); | |
| 1761 VisitForStackValue(value); | |
| 1762 DCHECK(property->emit_store()); | |
| 1763 __ CallRuntime(Runtime::kInternalSetPrototype, 2); | |
| 1764 } else { | |
| 1765 EmitPropertyKey(property, expr->GetIdForProperty(property_index)); | |
| 1766 VisitForStackValue(value); | |
| 1767 EmitSetHomeObjectIfNeeded( | |
| 1768 value, 2, expr->SlotForHomeObject(value, &store_slot_index)); | |
| 1769 | |
| 1770 switch (property->kind()) { | |
| 1771 case ObjectLiteral::Property::CONSTANT: | |
| 1772 case ObjectLiteral::Property::MATERIALIZED_LITERAL: | |
| 1773 case ObjectLiteral::Property::COMPUTED: | |
| 1774 if (property->emit_store()) { | |
| 1775 __ li(a0, Operand(Smi::FromInt(NONE))); | |
| 1776 __ push(a0); | |
| 1777 __ CallRuntime(Runtime::kDefineDataPropertyUnchecked, 4); | |
| 1778 } else { | |
| 1779 __ Drop(3); | |
| 1780 } | |
| 1781 break; | |
| 1782 | |
| 1783 case ObjectLiteral::Property::PROTOTYPE: | |
| 1784 UNREACHABLE(); | |
| 1785 break; | |
| 1786 | |
| 1787 case ObjectLiteral::Property::GETTER: | |
| 1788 __ li(a0, Operand(Smi::FromInt(NONE))); | |
| 1789 __ push(a0); | |
| 1790 __ CallRuntime(Runtime::kDefineGetterPropertyUnchecked, 4); | |
| 1791 break; | |
| 1792 | |
| 1793 case ObjectLiteral::Property::SETTER: | |
| 1794 __ li(a0, Operand(Smi::FromInt(NONE))); | |
| 1795 __ push(a0); | |
| 1796 __ CallRuntime(Runtime::kDefineSetterPropertyUnchecked, 4); | |
| 1797 break; | |
| 1798 } | |
| 1799 } | |
| 1800 } | |
| 1801 | |
| 1802 if (expr->has_function()) { | |
| 1803 DCHECK(result_saved); | |
| 1804 __ lw(a0, MemOperand(sp)); | |
| 1805 __ push(a0); | |
| 1806 __ CallRuntime(Runtime::kToFastProperties, 1); | |
| 1807 } | |
| 1808 | |
| 1809 if (result_saved) { | |
| 1810 context()->PlugTOS(); | |
| 1811 } else { | |
| 1812 context()->Plug(v0); | |
| 1813 } | |
| 1814 | |
| 1815 // Verify that compilation exactly consumed the number of store ic slots that | |
| 1816 // the ObjectLiteral node had to offer. | |
| 1817 DCHECK(!FLAG_vector_stores || store_slot_index == expr->slot_count()); | |
| 1818 } | |
| 1819 | |
| 1820 | |
| 1821 void FullCodeGenerator::VisitArrayLiteral(ArrayLiteral* expr) { | |
| 1822 Comment cmnt(masm_, "[ ArrayLiteral"); | |
| 1823 | |
| 1824 expr->BuildConstantElements(isolate()); | |
| 1825 | |
| 1826 Handle<FixedArray> constant_elements = expr->constant_elements(); | |
| 1827 bool has_fast_elements = | |
| 1828 IsFastObjectElementsKind(expr->constant_elements_kind()); | |
| 1829 | |
| 1830 AllocationSiteMode allocation_site_mode = TRACK_ALLOCATION_SITE; | |
| 1831 if (has_fast_elements && !FLAG_allocation_site_pretenuring) { | |
| 1832 // If the only customer of allocation sites is transitioning, then | |
| 1833 // we can turn it off if we don't have anywhere else to transition to. | |
| 1834 allocation_site_mode = DONT_TRACK_ALLOCATION_SITE; | |
| 1835 } | |
| 1836 | |
| 1837 __ mov(a0, result_register()); | |
| 1838 __ lw(a3, MemOperand(fp, JavaScriptFrameConstants::kFunctionOffset)); | |
| 1839 __ lw(a3, FieldMemOperand(a3, JSFunction::kLiteralsOffset)); | |
| 1840 __ li(a2, Operand(Smi::FromInt(expr->literal_index()))); | |
| 1841 __ li(a1, Operand(constant_elements)); | |
| 1842 if (MustCreateArrayLiteralWithRuntime(expr)) { | |
| 1843 __ li(a0, Operand(Smi::FromInt(expr->ComputeFlags()))); | |
| 1844 __ Push(a3, a2, a1, a0); | |
| 1845 __ CallRuntime(Runtime::kCreateArrayLiteral, 4); | |
| 1846 } else { | |
| 1847 FastCloneShallowArrayStub stub(isolate(), allocation_site_mode); | |
| 1848 __ CallStub(&stub); | |
| 1849 } | |
| 1850 PrepareForBailoutForId(expr->CreateLiteralId(), TOS_REG); | |
| 1851 | |
| 1852 bool result_saved = false; // Is the result saved to the stack? | |
| 1853 ZoneList<Expression*>* subexprs = expr->values(); | |
| 1854 int length = subexprs->length(); | |
| 1855 | |
| 1856 // Emit code to evaluate all the non-constant subexpressions and to store | |
| 1857 // them into the newly cloned array. | |
| 1858 int array_index = 0; | |
| 1859 for (; array_index < length; array_index++) { | |
| 1860 Expression* subexpr = subexprs->at(array_index); | |
| 1861 if (subexpr->IsSpread()) break; | |
| 1862 | |
| 1863 // If the subexpression is a literal or a simple materialized literal it | |
| 1864 // is already set in the cloned array. | |
| 1865 if (CompileTimeValue::IsCompileTimeValue(subexpr)) continue; | |
| 1866 | |
| 1867 if (!result_saved) { | |
| 1868 __ push(v0); // array literal | |
| 1869 __ Push(Smi::FromInt(expr->literal_index())); | |
| 1870 result_saved = true; | |
| 1871 } | |
| 1872 | |
| 1873 VisitForAccumulatorValue(subexpr); | |
| 1874 | |
| 1875 if (has_fast_elements) { | |
| 1876 int offset = FixedArray::kHeaderSize + (array_index * kPointerSize); | |
| 1877 __ lw(t2, MemOperand(sp, kPointerSize)); // Copy of array literal. | |
| 1878 __ lw(a1, FieldMemOperand(t2, JSObject::kElementsOffset)); | |
| 1879 __ sw(result_register(), FieldMemOperand(a1, offset)); | |
| 1880 // Update the write barrier for the array store. | |
| 1881 __ RecordWriteField(a1, offset, result_register(), a2, | |
| 1882 kRAHasBeenSaved, kDontSaveFPRegs, | |
| 1883 EMIT_REMEMBERED_SET, INLINE_SMI_CHECK); | |
| 1884 } else { | |
| 1885 __ li(a3, Operand(Smi::FromInt(array_index))); | |
| 1886 __ mov(a0, result_register()); | |
| 1887 StoreArrayLiteralElementStub stub(isolate()); | |
| 1888 __ CallStub(&stub); | |
| 1889 } | |
| 1890 | |
| 1891 PrepareForBailoutForId(expr->GetIdForElement(array_index), NO_REGISTERS); | |
| 1892 } | |
| 1893 | |
| 1894 // In case the array literal contains spread expressions it has two parts. The | |
| 1895 // first part is the "static" array which has a literal index is handled | |
| 1896 // above. The second part is the part after the first spread expression | |
| 1897 // (inclusive) and these elements gets appended to the array. Note that the | |
| 1898 // number elements an iterable produces is unknown ahead of time. | |
| 1899 if (array_index < length && result_saved) { | |
| 1900 __ Pop(); // literal index | |
| 1901 __ Pop(v0); | |
| 1902 result_saved = false; | |
| 1903 } | |
| 1904 for (; array_index < length; array_index++) { | |
| 1905 Expression* subexpr = subexprs->at(array_index); | |
| 1906 | |
| 1907 __ Push(v0); | |
| 1908 if (subexpr->IsSpread()) { | |
| 1909 VisitForStackValue(subexpr->AsSpread()->expression()); | |
| 1910 __ InvokeBuiltin(Builtins::CONCAT_ITERABLE_TO_ARRAY, CALL_FUNCTION); | |
| 1911 } else { | |
| 1912 VisitForStackValue(subexpr); | |
| 1913 __ CallRuntime(Runtime::kAppendElement, 2); | |
| 1914 } | |
| 1915 | |
| 1916 PrepareForBailoutForId(expr->GetIdForElement(array_index), NO_REGISTERS); | |
| 1917 } | |
| 1918 | |
| 1919 if (result_saved) { | |
| 1920 __ Pop(); // literal index | |
| 1921 context()->PlugTOS(); | |
| 1922 } else { | |
| 1923 context()->Plug(v0); | |
| 1924 } | |
| 1925 } | |
| 1926 | |
| 1927 | |
| 1928 void FullCodeGenerator::VisitAssignment(Assignment* expr) { | |
| 1929 DCHECK(expr->target()->IsValidReferenceExpressionOrThis()); | |
| 1930 | |
| 1931 Comment cmnt(masm_, "[ Assignment"); | |
| 1932 SetExpressionPosition(expr, INSERT_BREAK); | |
| 1933 | |
| 1934 Property* property = expr->target()->AsProperty(); | |
| 1935 LhsKind assign_type = Property::GetAssignType(property); | |
| 1936 | |
| 1937 // Evaluate LHS expression. | |
| 1938 switch (assign_type) { | |
| 1939 case VARIABLE: | |
| 1940 // Nothing to do here. | |
| 1941 break; | |
| 1942 case NAMED_PROPERTY: | |
| 1943 if (expr->is_compound()) { | |
| 1944 // We need the receiver both on the stack and in the register. | |
| 1945 VisitForStackValue(property->obj()); | |
| 1946 __ lw(LoadDescriptor::ReceiverRegister(), MemOperand(sp, 0)); | |
| 1947 } else { | |
| 1948 VisitForStackValue(property->obj()); | |
| 1949 } | |
| 1950 break; | |
| 1951 case NAMED_SUPER_PROPERTY: | |
| 1952 VisitForStackValue( | |
| 1953 property->obj()->AsSuperPropertyReference()->this_var()); | |
| 1954 VisitForAccumulatorValue( | |
| 1955 property->obj()->AsSuperPropertyReference()->home_object()); | |
| 1956 __ Push(result_register()); | |
| 1957 if (expr->is_compound()) { | |
| 1958 const Register scratch = a1; | |
| 1959 __ lw(scratch, MemOperand(sp, kPointerSize)); | |
| 1960 __ Push(scratch, result_register()); | |
| 1961 } | |
| 1962 break; | |
| 1963 case KEYED_SUPER_PROPERTY: { | |
| 1964 const Register scratch = a1; | |
| 1965 VisitForStackValue( | |
| 1966 property->obj()->AsSuperPropertyReference()->this_var()); | |
| 1967 VisitForAccumulatorValue( | |
| 1968 property->obj()->AsSuperPropertyReference()->home_object()); | |
| 1969 __ Move(scratch, result_register()); | |
| 1970 VisitForAccumulatorValue(property->key()); | |
| 1971 __ Push(scratch, result_register()); | |
| 1972 if (expr->is_compound()) { | |
| 1973 const Register scratch1 = t0; | |
| 1974 __ lw(scratch1, MemOperand(sp, 2 * kPointerSize)); | |
| 1975 __ Push(scratch1, scratch, result_register()); | |
| 1976 } | |
| 1977 break; | |
| 1978 } | |
| 1979 case KEYED_PROPERTY: | |
| 1980 // We need the key and receiver on both the stack and in v0 and a1. | |
| 1981 if (expr->is_compound()) { | |
| 1982 VisitForStackValue(property->obj()); | |
| 1983 VisitForStackValue(property->key()); | |
| 1984 __ lw(LoadDescriptor::ReceiverRegister(), | |
| 1985 MemOperand(sp, 1 * kPointerSize)); | |
| 1986 __ lw(LoadDescriptor::NameRegister(), MemOperand(sp, 0)); | |
| 1987 } else { | |
| 1988 VisitForStackValue(property->obj()); | |
| 1989 VisitForStackValue(property->key()); | |
| 1990 } | |
| 1991 break; | |
| 1992 } | |
| 1993 | |
| 1994 // For compound assignments we need another deoptimization point after the | |
| 1995 // variable/property load. | |
| 1996 if (expr->is_compound()) { | |
| 1997 { AccumulatorValueContext context(this); | |
| 1998 switch (assign_type) { | |
| 1999 case VARIABLE: | |
| 2000 EmitVariableLoad(expr->target()->AsVariableProxy()); | |
| 2001 PrepareForBailout(expr->target(), TOS_REG); | |
| 2002 break; | |
| 2003 case NAMED_PROPERTY: | |
| 2004 EmitNamedPropertyLoad(property); | |
| 2005 PrepareForBailoutForId(property->LoadId(), TOS_REG); | |
| 2006 break; | |
| 2007 case NAMED_SUPER_PROPERTY: | |
| 2008 EmitNamedSuperPropertyLoad(property); | |
| 2009 PrepareForBailoutForId(property->LoadId(), TOS_REG); | |
| 2010 break; | |
| 2011 case KEYED_SUPER_PROPERTY: | |
| 2012 EmitKeyedSuperPropertyLoad(property); | |
| 2013 PrepareForBailoutForId(property->LoadId(), TOS_REG); | |
| 2014 break; | |
| 2015 case KEYED_PROPERTY: | |
| 2016 EmitKeyedPropertyLoad(property); | |
| 2017 PrepareForBailoutForId(property->LoadId(), TOS_REG); | |
| 2018 break; | |
| 2019 } | |
| 2020 } | |
| 2021 | |
| 2022 Token::Value op = expr->binary_op(); | |
| 2023 __ push(v0); // Left operand goes on the stack. | |
| 2024 VisitForAccumulatorValue(expr->value()); | |
| 2025 | |
| 2026 AccumulatorValueContext context(this); | |
| 2027 if (ShouldInlineSmiCase(op)) { | |
| 2028 EmitInlineSmiBinaryOp(expr->binary_operation(), | |
| 2029 op, | |
| 2030 expr->target(), | |
| 2031 expr->value()); | |
| 2032 } else { | |
| 2033 EmitBinaryOp(expr->binary_operation(), op); | |
| 2034 } | |
| 2035 | |
| 2036 // Deoptimization point in case the binary operation may have side effects. | |
| 2037 PrepareForBailout(expr->binary_operation(), TOS_REG); | |
| 2038 } else { | |
| 2039 VisitForAccumulatorValue(expr->value()); | |
| 2040 } | |
| 2041 | |
| 2042 SetExpressionPosition(expr); | |
| 2043 | |
| 2044 // Store the value. | |
| 2045 switch (assign_type) { | |
| 2046 case VARIABLE: | |
| 2047 EmitVariableAssignment(expr->target()->AsVariableProxy()->var(), | |
| 2048 expr->op(), expr->AssignmentSlot()); | |
| 2049 PrepareForBailoutForId(expr->AssignmentId(), TOS_REG); | |
| 2050 context()->Plug(v0); | |
| 2051 break; | |
| 2052 case NAMED_PROPERTY: | |
| 2053 EmitNamedPropertyAssignment(expr); | |
| 2054 break; | |
| 2055 case NAMED_SUPER_PROPERTY: | |
| 2056 EmitNamedSuperPropertyStore(property); | |
| 2057 context()->Plug(v0); | |
| 2058 break; | |
| 2059 case KEYED_SUPER_PROPERTY: | |
| 2060 EmitKeyedSuperPropertyStore(property); | |
| 2061 context()->Plug(v0); | |
| 2062 break; | |
| 2063 case KEYED_PROPERTY: | |
| 2064 EmitKeyedPropertyAssignment(expr); | |
| 2065 break; | |
| 2066 } | |
| 2067 } | |
| 2068 | |
| 2069 | |
| 2070 void FullCodeGenerator::VisitYield(Yield* expr) { | |
| 2071 Comment cmnt(masm_, "[ Yield"); | |
| 2072 SetExpressionPosition(expr); | |
| 2073 | |
| 2074 // Evaluate yielded value first; the initial iterator definition depends on | |
| 2075 // this. It stays on the stack while we update the iterator. | |
| 2076 VisitForStackValue(expr->expression()); | |
| 2077 | |
| 2078 switch (expr->yield_kind()) { | |
| 2079 case Yield::kSuspend: | |
| 2080 // Pop value from top-of-stack slot; box result into result register. | |
| 2081 EmitCreateIteratorResult(false); | |
| 2082 __ push(result_register()); | |
| 2083 // Fall through. | |
| 2084 case Yield::kInitial: { | |
| 2085 Label suspend, continuation, post_runtime, resume; | |
| 2086 | |
| 2087 __ jmp(&suspend); | |
| 2088 __ bind(&continuation); | |
| 2089 __ RecordGeneratorContinuation(); | |
| 2090 __ jmp(&resume); | |
| 2091 | |
| 2092 __ bind(&suspend); | |
| 2093 VisitForAccumulatorValue(expr->generator_object()); | |
| 2094 DCHECK(continuation.pos() > 0 && Smi::IsValid(continuation.pos())); | |
| 2095 __ li(a1, Operand(Smi::FromInt(continuation.pos()))); | |
| 2096 __ sw(a1, FieldMemOperand(v0, JSGeneratorObject::kContinuationOffset)); | |
| 2097 __ sw(cp, FieldMemOperand(v0, JSGeneratorObject::kContextOffset)); | |
| 2098 __ mov(a1, cp); | |
| 2099 __ RecordWriteField(v0, JSGeneratorObject::kContextOffset, a1, a2, | |
| 2100 kRAHasBeenSaved, kDontSaveFPRegs); | |
| 2101 __ Addu(a1, fp, Operand(StandardFrameConstants::kExpressionsOffset)); | |
| 2102 __ Branch(&post_runtime, eq, sp, Operand(a1)); | |
| 2103 __ push(v0); // generator object | |
| 2104 __ CallRuntime(Runtime::kSuspendJSGeneratorObject, 1); | |
| 2105 __ lw(cp, MemOperand(fp, StandardFrameConstants::kContextOffset)); | |
| 2106 __ bind(&post_runtime); | |
| 2107 __ pop(result_register()); | |
| 2108 EmitReturnSequence(); | |
| 2109 | |
| 2110 __ bind(&resume); | |
| 2111 context()->Plug(result_register()); | |
| 2112 break; | |
| 2113 } | |
| 2114 | |
| 2115 case Yield::kFinal: { | |
| 2116 VisitForAccumulatorValue(expr->generator_object()); | |
| 2117 __ li(a1, Operand(Smi::FromInt(JSGeneratorObject::kGeneratorClosed))); | |
| 2118 __ sw(a1, FieldMemOperand(result_register(), | |
| 2119 JSGeneratorObject::kContinuationOffset)); | |
| 2120 // Pop value from top-of-stack slot, box result into result register. | |
| 2121 EmitCreateIteratorResult(true); | |
| 2122 EmitUnwindBeforeReturn(); | |
| 2123 EmitReturnSequence(); | |
| 2124 break; | |
| 2125 } | |
| 2126 | |
| 2127 case Yield::kDelegating: { | |
| 2128 VisitForStackValue(expr->generator_object()); | |
| 2129 | |
| 2130 // Initial stack layout is as follows: | |
| 2131 // [sp + 1 * kPointerSize] iter | |
| 2132 // [sp + 0 * kPointerSize] g | |
| 2133 | |
| 2134 Label l_catch, l_try, l_suspend, l_continuation, l_resume; | |
| 2135 Label l_next, l_call; | |
| 2136 Register load_receiver = LoadDescriptor::ReceiverRegister(); | |
| 2137 Register load_name = LoadDescriptor::NameRegister(); | |
| 2138 | |
| 2139 // Initial send value is undefined. | |
| 2140 __ LoadRoot(a0, Heap::kUndefinedValueRootIndex); | |
| 2141 __ Branch(&l_next); | |
| 2142 | |
| 2143 // catch (e) { receiver = iter; f = 'throw'; arg = e; goto l_call; } | |
| 2144 __ bind(&l_catch); | |
| 2145 __ mov(a0, v0); | |
| 2146 __ LoadRoot(load_name, Heap::kthrow_stringRootIndex); // "throw" | |
| 2147 __ lw(a3, MemOperand(sp, 1 * kPointerSize)); // iter | |
| 2148 __ Push(load_name, a3, a0); // "throw", iter, except | |
| 2149 __ jmp(&l_call); | |
| 2150 | |
| 2151 // try { received = %yield result } | |
| 2152 // Shuffle the received result above a try handler and yield it without | |
| 2153 // re-boxing. | |
| 2154 __ bind(&l_try); | |
| 2155 __ pop(a0); // result | |
| 2156 int handler_index = NewHandlerTableEntry(); | |
| 2157 EnterTryBlock(handler_index, &l_catch); | |
| 2158 const int try_block_size = TryCatch::kElementCount * kPointerSize; | |
| 2159 __ push(a0); // result | |
| 2160 | |
| 2161 __ jmp(&l_suspend); | |
| 2162 __ bind(&l_continuation); | |
| 2163 __ RecordGeneratorContinuation(); | |
| 2164 __ mov(a0, v0); | |
| 2165 __ jmp(&l_resume); | |
| 2166 | |
| 2167 __ bind(&l_suspend); | |
| 2168 const int generator_object_depth = kPointerSize + try_block_size; | |
| 2169 __ lw(a0, MemOperand(sp, generator_object_depth)); | |
| 2170 __ push(a0); // g | |
| 2171 __ Push(Smi::FromInt(handler_index)); // handler-index | |
| 2172 DCHECK(l_continuation.pos() > 0 && Smi::IsValid(l_continuation.pos())); | |
| 2173 __ li(a1, Operand(Smi::FromInt(l_continuation.pos()))); | |
| 2174 __ sw(a1, FieldMemOperand(a0, JSGeneratorObject::kContinuationOffset)); | |
| 2175 __ sw(cp, FieldMemOperand(a0, JSGeneratorObject::kContextOffset)); | |
| 2176 __ mov(a1, cp); | |
| 2177 __ RecordWriteField(a0, JSGeneratorObject::kContextOffset, a1, a2, | |
| 2178 kRAHasBeenSaved, kDontSaveFPRegs); | |
| 2179 __ CallRuntime(Runtime::kSuspendJSGeneratorObject, 2); | |
| 2180 __ lw(cp, MemOperand(fp, StandardFrameConstants::kContextOffset)); | |
| 2181 __ pop(v0); // result | |
| 2182 EmitReturnSequence(); | |
| 2183 __ mov(a0, v0); | |
| 2184 __ bind(&l_resume); // received in a0 | |
| 2185 ExitTryBlock(handler_index); | |
| 2186 | |
| 2187 // receiver = iter; f = 'next'; arg = received; | |
| 2188 __ bind(&l_next); | |
| 2189 | |
| 2190 __ LoadRoot(load_name, Heap::knext_stringRootIndex); // "next" | |
| 2191 __ lw(a3, MemOperand(sp, 1 * kPointerSize)); // iter | |
| 2192 __ Push(load_name, a3, a0); // "next", iter, received | |
| 2193 | |
| 2194 // result = receiver[f](arg); | |
| 2195 __ bind(&l_call); | |
| 2196 __ lw(load_receiver, MemOperand(sp, kPointerSize)); | |
| 2197 __ lw(load_name, MemOperand(sp, 2 * kPointerSize)); | |
| 2198 __ li(LoadDescriptor::SlotRegister(), | |
| 2199 Operand(SmiFromSlot(expr->KeyedLoadFeedbackSlot()))); | |
| 2200 Handle<Code> ic = CodeFactory::KeyedLoadIC(isolate(), SLOPPY).code(); | |
| 2201 CallIC(ic, TypeFeedbackId::None()); | |
| 2202 __ mov(a0, v0); | |
| 2203 __ mov(a1, a0); | |
| 2204 __ sw(a1, MemOperand(sp, 2 * kPointerSize)); | |
| 2205 SetCallPosition(expr, 1); | |
| 2206 CallFunctionStub stub(isolate(), 1, CALL_AS_METHOD); | |
| 2207 __ CallStub(&stub); | |
| 2208 | |
| 2209 __ lw(cp, MemOperand(fp, StandardFrameConstants::kContextOffset)); | |
| 2210 __ Drop(1); // The function is still on the stack; drop it. | |
| 2211 | |
| 2212 // if (!result.done) goto l_try; | |
| 2213 __ Move(load_receiver, v0); | |
| 2214 | |
| 2215 __ push(load_receiver); // save result | |
| 2216 __ LoadRoot(load_name, Heap::kdone_stringRootIndex); // "done" | |
| 2217 __ li(LoadDescriptor::SlotRegister(), | |
| 2218 Operand(SmiFromSlot(expr->DoneFeedbackSlot()))); | |
| 2219 CallLoadIC(NOT_INSIDE_TYPEOF); // v0=result.done | |
| 2220 __ mov(a0, v0); | |
| 2221 Handle<Code> bool_ic = ToBooleanStub::GetUninitialized(isolate()); | |
| 2222 CallIC(bool_ic); | |
| 2223 __ Branch(&l_try, eq, v0, Operand(zero_reg)); | |
| 2224 | |
| 2225 // result.value | |
| 2226 __ pop(load_receiver); // result | |
| 2227 __ LoadRoot(load_name, Heap::kvalue_stringRootIndex); // "value" | |
| 2228 __ li(LoadDescriptor::SlotRegister(), | |
| 2229 Operand(SmiFromSlot(expr->ValueFeedbackSlot()))); | |
| 2230 CallLoadIC(NOT_INSIDE_TYPEOF); // v0=result.value | |
| 2231 context()->DropAndPlug(2, v0); // drop iter and g | |
| 2232 break; | |
| 2233 } | |
| 2234 } | |
| 2235 } | |
| 2236 | |
| 2237 | |
| 2238 void FullCodeGenerator::EmitGeneratorResume(Expression *generator, | |
| 2239 Expression *value, | |
| 2240 JSGeneratorObject::ResumeMode resume_mode) { | |
| 2241 // The value stays in a0, and is ultimately read by the resumed generator, as | |
| 2242 // if CallRuntime(Runtime::kSuspendJSGeneratorObject) returned it. Or it | |
| 2243 // is read to throw the value when the resumed generator is already closed. | |
| 2244 // a1 will hold the generator object until the activation has been resumed. | |
| 2245 VisitForStackValue(generator); | |
| 2246 VisitForAccumulatorValue(value); | |
| 2247 __ pop(a1); | |
| 2248 | |
| 2249 // Load suspended function and context. | |
| 2250 __ lw(cp, FieldMemOperand(a1, JSGeneratorObject::kContextOffset)); | |
| 2251 __ lw(t0, FieldMemOperand(a1, JSGeneratorObject::kFunctionOffset)); | |
| 2252 | |
| 2253 // Load receiver and store as the first argument. | |
| 2254 __ lw(a2, FieldMemOperand(a1, JSGeneratorObject::kReceiverOffset)); | |
| 2255 __ push(a2); | |
| 2256 | |
| 2257 // Push holes for the rest of the arguments to the generator function. | |
| 2258 __ lw(a3, FieldMemOperand(t0, JSFunction::kSharedFunctionInfoOffset)); | |
| 2259 __ lw(a3, | |
| 2260 FieldMemOperand(a3, SharedFunctionInfo::kFormalParameterCountOffset)); | |
| 2261 __ LoadRoot(a2, Heap::kTheHoleValueRootIndex); | |
| 2262 Label push_argument_holes, push_frame; | |
| 2263 __ bind(&push_argument_holes); | |
| 2264 __ Subu(a3, a3, Operand(Smi::FromInt(1))); | |
| 2265 __ Branch(&push_frame, lt, a3, Operand(zero_reg)); | |
| 2266 __ push(a2); | |
| 2267 __ jmp(&push_argument_holes); | |
| 2268 | |
| 2269 // Enter a new JavaScript frame, and initialize its slots as they were when | |
| 2270 // the generator was suspended. | |
| 2271 Label resume_frame, done; | |
| 2272 __ bind(&push_frame); | |
| 2273 __ Call(&resume_frame); | |
| 2274 __ jmp(&done); | |
| 2275 __ bind(&resume_frame); | |
| 2276 // ra = return address. | |
| 2277 // fp = caller's frame pointer. | |
| 2278 // cp = callee's context, | |
| 2279 // t0 = callee's JS function. | |
| 2280 __ Push(ra, fp, cp, t0); | |
| 2281 // Adjust FP to point to saved FP. | |
| 2282 __ Addu(fp, sp, 2 * kPointerSize); | |
| 2283 | |
| 2284 // Load the operand stack size. | |
| 2285 __ lw(a3, FieldMemOperand(a1, JSGeneratorObject::kOperandStackOffset)); | |
| 2286 __ lw(a3, FieldMemOperand(a3, FixedArray::kLengthOffset)); | |
| 2287 __ SmiUntag(a3); | |
| 2288 | |
| 2289 // If we are sending a value and there is no operand stack, we can jump back | |
| 2290 // in directly. | |
| 2291 if (resume_mode == JSGeneratorObject::NEXT) { | |
| 2292 Label slow_resume; | |
| 2293 __ Branch(&slow_resume, ne, a3, Operand(zero_reg)); | |
| 2294 __ lw(a3, FieldMemOperand(t0, JSFunction::kCodeEntryOffset)); | |
| 2295 __ lw(a2, FieldMemOperand(a1, JSGeneratorObject::kContinuationOffset)); | |
| 2296 __ SmiUntag(a2); | |
| 2297 __ Addu(a3, a3, Operand(a2)); | |
| 2298 __ li(a2, Operand(Smi::FromInt(JSGeneratorObject::kGeneratorExecuting))); | |
| 2299 __ sw(a2, FieldMemOperand(a1, JSGeneratorObject::kContinuationOffset)); | |
| 2300 __ Jump(a3); | |
| 2301 __ bind(&slow_resume); | |
| 2302 } | |
| 2303 | |
| 2304 // Otherwise, we push holes for the operand stack and call the runtime to fix | |
| 2305 // up the stack and the handlers. | |
| 2306 Label push_operand_holes, call_resume; | |
| 2307 __ bind(&push_operand_holes); | |
| 2308 __ Subu(a3, a3, Operand(1)); | |
| 2309 __ Branch(&call_resume, lt, a3, Operand(zero_reg)); | |
| 2310 __ push(a2); | |
| 2311 __ Branch(&push_operand_holes); | |
| 2312 __ bind(&call_resume); | |
| 2313 DCHECK(!result_register().is(a1)); | |
| 2314 __ Push(a1, result_register()); | |
| 2315 __ Push(Smi::FromInt(resume_mode)); | |
| 2316 __ CallRuntime(Runtime::kResumeJSGeneratorObject, 3); | |
| 2317 // Not reached: the runtime call returns elsewhere. | |
| 2318 __ stop("not-reached"); | |
| 2319 | |
| 2320 __ bind(&done); | |
| 2321 context()->Plug(result_register()); | |
| 2322 } | |
| 2323 | |
| 2324 | |
| 2325 void FullCodeGenerator::EmitCreateIteratorResult(bool done) { | |
| 2326 Label gc_required; | |
| 2327 Label allocated; | |
| 2328 | |
| 2329 const int instance_size = 5 * kPointerSize; | |
| 2330 DCHECK_EQ(isolate()->native_context()->iterator_result_map()->instance_size(), | |
| 2331 instance_size); | |
| 2332 | |
| 2333 __ Allocate(instance_size, v0, a2, a3, &gc_required, TAG_OBJECT); | |
| 2334 __ jmp(&allocated); | |
| 2335 | |
| 2336 __ bind(&gc_required); | |
| 2337 __ Push(Smi::FromInt(instance_size)); | |
| 2338 __ CallRuntime(Runtime::kAllocateInNewSpace, 1); | |
| 2339 __ lw(context_register(), | |
| 2340 MemOperand(fp, StandardFrameConstants::kContextOffset)); | |
| 2341 | |
| 2342 __ bind(&allocated); | |
| 2343 __ lw(a1, ContextOperand(cp, Context::GLOBAL_OBJECT_INDEX)); | |
| 2344 __ lw(a1, FieldMemOperand(a1, GlobalObject::kNativeContextOffset)); | |
| 2345 __ lw(a1, ContextOperand(a1, Context::ITERATOR_RESULT_MAP_INDEX)); | |
| 2346 __ pop(a2); | |
| 2347 __ li(a3, Operand(isolate()->factory()->ToBoolean(done))); | |
| 2348 __ li(t0, Operand(isolate()->factory()->empty_fixed_array())); | |
| 2349 __ sw(a1, FieldMemOperand(v0, HeapObject::kMapOffset)); | |
| 2350 __ sw(t0, FieldMemOperand(v0, JSObject::kPropertiesOffset)); | |
| 2351 __ sw(t0, FieldMemOperand(v0, JSObject::kElementsOffset)); | |
| 2352 __ sw(a2, | |
| 2353 FieldMemOperand(v0, JSGeneratorObject::kResultValuePropertyOffset)); | |
| 2354 __ sw(a3, | |
| 2355 FieldMemOperand(v0, JSGeneratorObject::kResultDonePropertyOffset)); | |
| 2356 | |
| 2357 // Only the value field needs a write barrier, as the other values are in the | |
| 2358 // root set. | |
| 2359 __ RecordWriteField(v0, JSGeneratorObject::kResultValuePropertyOffset, | |
| 2360 a2, a3, kRAHasBeenSaved, kDontSaveFPRegs); | |
| 2361 } | |
| 2362 | |
| 2363 | |
| 2364 void FullCodeGenerator::EmitNamedPropertyLoad(Property* prop) { | |
| 2365 SetExpressionPosition(prop); | |
| 2366 Literal* key = prop->key()->AsLiteral(); | |
| 2367 DCHECK(!prop->IsSuperAccess()); | |
| 2368 | |
| 2369 __ li(LoadDescriptor::NameRegister(), Operand(key->value())); | |
| 2370 __ li(LoadDescriptor::SlotRegister(), | |
| 2371 Operand(SmiFromSlot(prop->PropertyFeedbackSlot()))); | |
| 2372 CallLoadIC(NOT_INSIDE_TYPEOF, language_mode()); | |
| 2373 } | |
| 2374 | |
| 2375 | |
| 2376 void FullCodeGenerator::EmitNamedSuperPropertyLoad(Property* prop) { | |
| 2377 // Stack: receiver, home_object. | |
| 2378 SetExpressionPosition(prop); | |
| 2379 | |
| 2380 Literal* key = prop->key()->AsLiteral(); | |
| 2381 DCHECK(!key->value()->IsSmi()); | |
| 2382 DCHECK(prop->IsSuperAccess()); | |
| 2383 | |
| 2384 __ Push(key->value()); | |
| 2385 __ Push(Smi::FromInt(language_mode())); | |
| 2386 __ CallRuntime(Runtime::kLoadFromSuper, 4); | |
| 2387 } | |
| 2388 | |
| 2389 | |
| 2390 void FullCodeGenerator::EmitKeyedPropertyLoad(Property* prop) { | |
| 2391 SetExpressionPosition(prop); | |
| 2392 Handle<Code> ic = CodeFactory::KeyedLoadIC(isolate(), language_mode()).code(); | |
| 2393 __ li(LoadDescriptor::SlotRegister(), | |
| 2394 Operand(SmiFromSlot(prop->PropertyFeedbackSlot()))); | |
| 2395 CallIC(ic); | |
| 2396 } | |
| 2397 | |
| 2398 | |
| 2399 void FullCodeGenerator::EmitKeyedSuperPropertyLoad(Property* prop) { | |
| 2400 // Stack: receiver, home_object, key. | |
| 2401 SetExpressionPosition(prop); | |
| 2402 __ Push(Smi::FromInt(language_mode())); | |
| 2403 __ CallRuntime(Runtime::kLoadKeyedFromSuper, 4); | |
| 2404 } | |
| 2405 | |
| 2406 | |
| 2407 void FullCodeGenerator::EmitInlineSmiBinaryOp(BinaryOperation* expr, | |
| 2408 Token::Value op, | |
| 2409 Expression* left_expr, | |
| 2410 Expression* right_expr) { | |
| 2411 Label done, smi_case, stub_call; | |
| 2412 | |
| 2413 Register scratch1 = a2; | |
| 2414 Register scratch2 = a3; | |
| 2415 | |
| 2416 // Get the arguments. | |
| 2417 Register left = a1; | |
| 2418 Register right = a0; | |
| 2419 __ pop(left); | |
| 2420 __ mov(a0, result_register()); | |
| 2421 | |
| 2422 // Perform combined smi check on both operands. | |
| 2423 __ Or(scratch1, left, Operand(right)); | |
| 2424 STATIC_ASSERT(kSmiTag == 0); | |
| 2425 JumpPatchSite patch_site(masm_); | |
| 2426 patch_site.EmitJumpIfSmi(scratch1, &smi_case); | |
| 2427 | |
| 2428 __ bind(&stub_call); | |
| 2429 Handle<Code> code = | |
| 2430 CodeFactory::BinaryOpIC(isolate(), op, strength(language_mode())).code(); | |
| 2431 CallIC(code, expr->BinaryOperationFeedbackId()); | |
| 2432 patch_site.EmitPatchInfo(); | |
| 2433 __ jmp(&done); | |
| 2434 | |
| 2435 __ bind(&smi_case); | |
| 2436 // Smi case. This code works the same way as the smi-smi case in the type | |
| 2437 // recording binary operation stub, see | |
| 2438 switch (op) { | |
| 2439 case Token::SAR: | |
| 2440 __ GetLeastBitsFromSmi(scratch1, right, 5); | |
| 2441 __ srav(right, left, scratch1); | |
| 2442 __ And(v0, right, Operand(~kSmiTagMask)); | |
| 2443 break; | |
| 2444 case Token::SHL: { | |
| 2445 __ SmiUntag(scratch1, left); | |
| 2446 __ GetLeastBitsFromSmi(scratch2, right, 5); | |
| 2447 __ sllv(scratch1, scratch1, scratch2); | |
| 2448 __ Addu(scratch2, scratch1, Operand(0x40000000)); | |
| 2449 __ Branch(&stub_call, lt, scratch2, Operand(zero_reg)); | |
| 2450 __ SmiTag(v0, scratch1); | |
| 2451 break; | |
| 2452 } | |
| 2453 case Token::SHR: { | |
| 2454 __ SmiUntag(scratch1, left); | |
| 2455 __ GetLeastBitsFromSmi(scratch2, right, 5); | |
| 2456 __ srlv(scratch1, scratch1, scratch2); | |
| 2457 __ And(scratch2, scratch1, 0xc0000000); | |
| 2458 __ Branch(&stub_call, ne, scratch2, Operand(zero_reg)); | |
| 2459 __ SmiTag(v0, scratch1); | |
| 2460 break; | |
| 2461 } | |
| 2462 case Token::ADD: | |
| 2463 __ AdduAndCheckForOverflow(v0, left, right, scratch1); | |
| 2464 __ BranchOnOverflow(&stub_call, scratch1); | |
| 2465 break; | |
| 2466 case Token::SUB: | |
| 2467 __ SubuAndCheckForOverflow(v0, left, right, scratch1); | |
| 2468 __ BranchOnOverflow(&stub_call, scratch1); | |
| 2469 break; | |
| 2470 case Token::MUL: { | |
| 2471 __ SmiUntag(scratch1, right); | |
| 2472 __ Mul(scratch2, v0, left, scratch1); | |
| 2473 __ sra(scratch1, v0, 31); | |
| 2474 __ Branch(&stub_call, ne, scratch1, Operand(scratch2)); | |
| 2475 __ Branch(&done, ne, v0, Operand(zero_reg)); | |
| 2476 __ Addu(scratch2, right, left); | |
| 2477 __ Branch(&stub_call, lt, scratch2, Operand(zero_reg)); | |
| 2478 DCHECK(Smi::FromInt(0) == 0); | |
| 2479 __ mov(v0, zero_reg); | |
| 2480 break; | |
| 2481 } | |
| 2482 case Token::BIT_OR: | |
| 2483 __ Or(v0, left, Operand(right)); | |
| 2484 break; | |
| 2485 case Token::BIT_AND: | |
| 2486 __ And(v0, left, Operand(right)); | |
| 2487 break; | |
| 2488 case Token::BIT_XOR: | |
| 2489 __ Xor(v0, left, Operand(right)); | |
| 2490 break; | |
| 2491 default: | |
| 2492 UNREACHABLE(); | |
| 2493 } | |
| 2494 | |
| 2495 __ bind(&done); | |
| 2496 context()->Plug(v0); | |
| 2497 } | |
| 2498 | |
| 2499 | |
| 2500 void FullCodeGenerator::EmitClassDefineProperties(ClassLiteral* lit, | |
| 2501 int* used_store_slots) { | |
| 2502 // Constructor is in v0. | |
| 2503 DCHECK(lit != NULL); | |
| 2504 __ push(v0); | |
| 2505 | |
| 2506 // No access check is needed here since the constructor is created by the | |
| 2507 // class literal. | |
| 2508 Register scratch = a1; | |
| 2509 __ lw(scratch, | |
| 2510 FieldMemOperand(v0, JSFunction::kPrototypeOrInitialMapOffset)); | |
| 2511 __ push(scratch); | |
| 2512 | |
| 2513 for (int i = 0; i < lit->properties()->length(); i++) { | |
| 2514 ObjectLiteral::Property* property = lit->properties()->at(i); | |
| 2515 Expression* value = property->value(); | |
| 2516 | |
| 2517 if (property->is_static()) { | |
| 2518 __ lw(scratch, MemOperand(sp, kPointerSize)); // constructor | |
| 2519 } else { | |
| 2520 __ lw(scratch, MemOperand(sp, 0)); // prototype | |
| 2521 } | |
| 2522 __ push(scratch); | |
| 2523 EmitPropertyKey(property, lit->GetIdForProperty(i)); | |
| 2524 | |
| 2525 // The static prototype property is read only. We handle the non computed | |
| 2526 // property name case in the parser. Since this is the only case where we | |
| 2527 // need to check for an own read only property we special case this so we do | |
| 2528 // not need to do this for every property. | |
| 2529 if (property->is_static() && property->is_computed_name()) { | |
| 2530 __ CallRuntime(Runtime::kThrowIfStaticPrototype, 1); | |
| 2531 __ push(v0); | |
| 2532 } | |
| 2533 | |
| 2534 VisitForStackValue(value); | |
| 2535 EmitSetHomeObjectIfNeeded(value, 2, | |
| 2536 lit->SlotForHomeObject(value, used_store_slots)); | |
| 2537 | |
| 2538 switch (property->kind()) { | |
| 2539 case ObjectLiteral::Property::CONSTANT: | |
| 2540 case ObjectLiteral::Property::MATERIALIZED_LITERAL: | |
| 2541 case ObjectLiteral::Property::PROTOTYPE: | |
| 2542 UNREACHABLE(); | |
| 2543 case ObjectLiteral::Property::COMPUTED: | |
| 2544 __ CallRuntime(Runtime::kDefineClassMethod, 3); | |
| 2545 break; | |
| 2546 | |
| 2547 case ObjectLiteral::Property::GETTER: | |
| 2548 __ li(a0, Operand(Smi::FromInt(DONT_ENUM))); | |
| 2549 __ push(a0); | |
| 2550 __ CallRuntime(Runtime::kDefineGetterPropertyUnchecked, 4); | |
| 2551 break; | |
| 2552 | |
| 2553 case ObjectLiteral::Property::SETTER: | |
| 2554 __ li(a0, Operand(Smi::FromInt(DONT_ENUM))); | |
| 2555 __ push(a0); | |
| 2556 __ CallRuntime(Runtime::kDefineSetterPropertyUnchecked, 4); | |
| 2557 break; | |
| 2558 | |
| 2559 default: | |
| 2560 UNREACHABLE(); | |
| 2561 } | |
| 2562 } | |
| 2563 | |
| 2564 // prototype | |
| 2565 __ CallRuntime(Runtime::kToFastProperties, 1); | |
| 2566 | |
| 2567 // constructor | |
| 2568 __ CallRuntime(Runtime::kToFastProperties, 1); | |
| 2569 | |
| 2570 if (is_strong(language_mode())) { | |
| 2571 __ lw(scratch, | |
| 2572 FieldMemOperand(v0, JSFunction::kPrototypeOrInitialMapOffset)); | |
| 2573 __ Push(v0, scratch); | |
| 2574 // TODO(conradw): It would be more efficient to define the properties with | |
| 2575 // the right attributes the first time round. | |
| 2576 // Freeze the prototype. | |
| 2577 __ CallRuntime(Runtime::kObjectFreeze, 1); | |
| 2578 // Freeze the constructor. | |
| 2579 __ CallRuntime(Runtime::kObjectFreeze, 1); | |
| 2580 } | |
| 2581 } | |
| 2582 | |
| 2583 | |
| 2584 void FullCodeGenerator::EmitBinaryOp(BinaryOperation* expr, Token::Value op) { | |
| 2585 __ mov(a0, result_register()); | |
| 2586 __ pop(a1); | |
| 2587 Handle<Code> code = | |
| 2588 CodeFactory::BinaryOpIC(isolate(), op, strength(language_mode())).code(); | |
| 2589 JumpPatchSite patch_site(masm_); // unbound, signals no inlined smi code. | |
| 2590 CallIC(code, expr->BinaryOperationFeedbackId()); | |
| 2591 patch_site.EmitPatchInfo(); | |
| 2592 context()->Plug(v0); | |
| 2593 } | |
| 2594 | |
| 2595 | |
| 2596 void FullCodeGenerator::EmitAssignment(Expression* expr, | |
| 2597 FeedbackVectorICSlot slot) { | |
| 2598 DCHECK(expr->IsValidReferenceExpressionOrThis()); | |
| 2599 | |
| 2600 Property* prop = expr->AsProperty(); | |
| 2601 LhsKind assign_type = Property::GetAssignType(prop); | |
| 2602 | |
| 2603 switch (assign_type) { | |
| 2604 case VARIABLE: { | |
| 2605 Variable* var = expr->AsVariableProxy()->var(); | |
| 2606 EffectContext context(this); | |
| 2607 EmitVariableAssignment(var, Token::ASSIGN, slot); | |
| 2608 break; | |
| 2609 } | |
| 2610 case NAMED_PROPERTY: { | |
| 2611 __ push(result_register()); // Preserve value. | |
| 2612 VisitForAccumulatorValue(prop->obj()); | |
| 2613 __ mov(StoreDescriptor::ReceiverRegister(), result_register()); | |
| 2614 __ pop(StoreDescriptor::ValueRegister()); // Restore value. | |
| 2615 __ li(StoreDescriptor::NameRegister(), | |
| 2616 Operand(prop->key()->AsLiteral()->value())); | |
| 2617 if (FLAG_vector_stores) EmitLoadStoreICSlot(slot); | |
| 2618 CallStoreIC(); | |
| 2619 break; | |
| 2620 } | |
| 2621 case NAMED_SUPER_PROPERTY: { | |
| 2622 __ Push(v0); | |
| 2623 VisitForStackValue(prop->obj()->AsSuperPropertyReference()->this_var()); | |
| 2624 VisitForAccumulatorValue( | |
| 2625 prop->obj()->AsSuperPropertyReference()->home_object()); | |
| 2626 // stack: value, this; v0: home_object | |
| 2627 Register scratch = a2; | |
| 2628 Register scratch2 = a3; | |
| 2629 __ mov(scratch, result_register()); // home_object | |
| 2630 __ lw(v0, MemOperand(sp, kPointerSize)); // value | |
| 2631 __ lw(scratch2, MemOperand(sp, 0)); // this | |
| 2632 __ sw(scratch2, MemOperand(sp, kPointerSize)); // this | |
| 2633 __ sw(scratch, MemOperand(sp, 0)); // home_object | |
| 2634 // stack: this, home_object; v0: value | |
| 2635 EmitNamedSuperPropertyStore(prop); | |
| 2636 break; | |
| 2637 } | |
| 2638 case KEYED_SUPER_PROPERTY: { | |
| 2639 __ Push(v0); | |
| 2640 VisitForStackValue(prop->obj()->AsSuperPropertyReference()->this_var()); | |
| 2641 VisitForStackValue( | |
| 2642 prop->obj()->AsSuperPropertyReference()->home_object()); | |
| 2643 VisitForAccumulatorValue(prop->key()); | |
| 2644 Register scratch = a2; | |
| 2645 Register scratch2 = a3; | |
| 2646 __ lw(scratch2, MemOperand(sp, 2 * kPointerSize)); // value | |
| 2647 // stack: value, this, home_object; v0: key, a3: value | |
| 2648 __ lw(scratch, MemOperand(sp, kPointerSize)); // this | |
| 2649 __ sw(scratch, MemOperand(sp, 2 * kPointerSize)); | |
| 2650 __ lw(scratch, MemOperand(sp, 0)); // home_object | |
| 2651 __ sw(scratch, MemOperand(sp, kPointerSize)); | |
| 2652 __ sw(v0, MemOperand(sp, 0)); | |
| 2653 __ Move(v0, scratch2); | |
| 2654 // stack: this, home_object, key; v0: value. | |
| 2655 EmitKeyedSuperPropertyStore(prop); | |
| 2656 break; | |
| 2657 } | |
| 2658 case KEYED_PROPERTY: { | |
| 2659 __ push(result_register()); // Preserve value. | |
| 2660 VisitForStackValue(prop->obj()); | |
| 2661 VisitForAccumulatorValue(prop->key()); | |
| 2662 __ mov(StoreDescriptor::NameRegister(), result_register()); | |
| 2663 __ Pop(StoreDescriptor::ValueRegister(), | |
| 2664 StoreDescriptor::ReceiverRegister()); | |
| 2665 if (FLAG_vector_stores) EmitLoadStoreICSlot(slot); | |
| 2666 Handle<Code> ic = | |
| 2667 CodeFactory::KeyedStoreIC(isolate(), language_mode()).code(); | |
| 2668 CallIC(ic); | |
| 2669 break; | |
| 2670 } | |
| 2671 } | |
| 2672 context()->Plug(v0); | |
| 2673 } | |
| 2674 | |
| 2675 | |
| 2676 void FullCodeGenerator::EmitStoreToStackLocalOrContextSlot( | |
| 2677 Variable* var, MemOperand location) { | |
| 2678 __ sw(result_register(), location); | |
| 2679 if (var->IsContextSlot()) { | |
| 2680 // RecordWrite may destroy all its register arguments. | |
| 2681 __ Move(a3, result_register()); | |
| 2682 int offset = Context::SlotOffset(var->index()); | |
| 2683 __ RecordWriteContextSlot( | |
| 2684 a1, offset, a3, a2, kRAHasBeenSaved, kDontSaveFPRegs); | |
| 2685 } | |
| 2686 } | |
| 2687 | |
| 2688 | |
| 2689 void FullCodeGenerator::EmitVariableAssignment(Variable* var, Token::Value op, | |
| 2690 FeedbackVectorICSlot slot) { | |
| 2691 if (var->IsUnallocated()) { | |
| 2692 // Global var, const, or let. | |
| 2693 __ mov(StoreDescriptor::ValueRegister(), result_register()); | |
| 2694 __ li(StoreDescriptor::NameRegister(), Operand(var->name())); | |
| 2695 __ lw(StoreDescriptor::ReceiverRegister(), GlobalObjectOperand()); | |
| 2696 if (FLAG_vector_stores) EmitLoadStoreICSlot(slot); | |
| 2697 CallStoreIC(); | |
| 2698 | |
| 2699 } else if (var->IsGlobalSlot()) { | |
| 2700 // Global var, const, or let. | |
| 2701 DCHECK(var->index() > 0); | |
| 2702 DCHECK(var->IsStaticGlobalObjectProperty()); | |
| 2703 // Each var occupies two slots in the context: for reads and writes. | |
| 2704 int slot_index = var->index() + 1; | |
| 2705 int depth = scope()->ContextChainLength(var->scope()); | |
| 2706 __ li(StoreGlobalViaContextDescriptor::DepthRegister(), | |
| 2707 Operand(Smi::FromInt(depth))); | |
| 2708 __ li(StoreGlobalViaContextDescriptor::SlotRegister(), | |
| 2709 Operand(Smi::FromInt(slot_index))); | |
| 2710 __ li(StoreGlobalViaContextDescriptor::NameRegister(), | |
| 2711 Operand(var->name())); | |
| 2712 __ mov(StoreGlobalViaContextDescriptor::ValueRegister(), result_register()); | |
| 2713 StoreGlobalViaContextStub stub(isolate(), depth, language_mode()); | |
| 2714 __ CallStub(&stub); | |
| 2715 | |
| 2716 } else if (var->mode() == LET && op != Token::INIT_LET) { | |
| 2717 // Non-initializing assignment to let variable needs a write barrier. | |
| 2718 DCHECK(!var->IsLookupSlot()); | |
| 2719 DCHECK(var->IsStackAllocated() || var->IsContextSlot()); | |
| 2720 Label assign; | |
| 2721 MemOperand location = VarOperand(var, a1); | |
| 2722 __ lw(a3, location); | |
| 2723 __ LoadRoot(t0, Heap::kTheHoleValueRootIndex); | |
| 2724 __ Branch(&assign, ne, a3, Operand(t0)); | |
| 2725 __ li(a3, Operand(var->name())); | |
| 2726 __ push(a3); | |
| 2727 __ CallRuntime(Runtime::kThrowReferenceError, 1); | |
| 2728 // Perform the assignment. | |
| 2729 __ bind(&assign); | |
| 2730 EmitStoreToStackLocalOrContextSlot(var, location); | |
| 2731 | |
| 2732 } else if (var->mode() == CONST && op != Token::INIT_CONST) { | |
| 2733 // Assignment to const variable needs a write barrier. | |
| 2734 DCHECK(!var->IsLookupSlot()); | |
| 2735 DCHECK(var->IsStackAllocated() || var->IsContextSlot()); | |
| 2736 Label const_error; | |
| 2737 MemOperand location = VarOperand(var, a1); | |
| 2738 __ lw(a3, location); | |
| 2739 __ LoadRoot(at, Heap::kTheHoleValueRootIndex); | |
| 2740 __ Branch(&const_error, ne, a3, Operand(at)); | |
| 2741 __ li(a3, Operand(var->name())); | |
| 2742 __ push(a3); | |
| 2743 __ CallRuntime(Runtime::kThrowReferenceError, 1); | |
| 2744 __ bind(&const_error); | |
| 2745 __ CallRuntime(Runtime::kThrowConstAssignError, 0); | |
| 2746 | |
| 2747 } else if (var->is_this() && op == Token::INIT_CONST) { | |
| 2748 // Initializing assignment to const {this} needs a write barrier. | |
| 2749 DCHECK(var->IsStackAllocated() || var->IsContextSlot()); | |
| 2750 Label uninitialized_this; | |
| 2751 MemOperand location = VarOperand(var, a1); | |
| 2752 __ lw(a3, location); | |
| 2753 __ LoadRoot(at, Heap::kTheHoleValueRootIndex); | |
| 2754 __ Branch(&uninitialized_this, eq, a3, Operand(at)); | |
| 2755 __ li(a0, Operand(var->name())); | |
| 2756 __ Push(a0); | |
| 2757 __ CallRuntime(Runtime::kThrowReferenceError, 1); | |
| 2758 __ bind(&uninitialized_this); | |
| 2759 EmitStoreToStackLocalOrContextSlot(var, location); | |
| 2760 | |
| 2761 } else if (!var->is_const_mode() || op == Token::INIT_CONST) { | |
| 2762 if (var->IsLookupSlot()) { | |
| 2763 // Assignment to var. | |
| 2764 __ li(a1, Operand(var->name())); | |
| 2765 __ li(a0, Operand(Smi::FromInt(language_mode()))); | |
| 2766 __ Push(v0, cp, a1, a0); // Value, context, name, language mode. | |
| 2767 __ CallRuntime(Runtime::kStoreLookupSlot, 4); | |
| 2768 } else { | |
| 2769 // Assignment to var or initializing assignment to let/const in harmony | |
| 2770 // mode. | |
| 2771 DCHECK((var->IsStackAllocated() || var->IsContextSlot())); | |
| 2772 MemOperand location = VarOperand(var, a1); | |
| 2773 if (generate_debug_code_ && op == Token::INIT_LET) { | |
| 2774 // Check for an uninitialized let binding. | |
| 2775 __ lw(a2, location); | |
| 2776 __ LoadRoot(t0, Heap::kTheHoleValueRootIndex); | |
| 2777 __ Check(eq, kLetBindingReInitialization, a2, Operand(t0)); | |
| 2778 } | |
| 2779 EmitStoreToStackLocalOrContextSlot(var, location); | |
| 2780 } | |
| 2781 | |
| 2782 } else if (op == Token::INIT_CONST_LEGACY) { | |
| 2783 // Const initializers need a write barrier. | |
| 2784 DCHECK(!var->IsParameter()); // No const parameters. | |
| 2785 if (var->IsLookupSlot()) { | |
| 2786 __ li(a0, Operand(var->name())); | |
| 2787 __ Push(v0, cp, a0); // Context and name. | |
| 2788 __ CallRuntime(Runtime::kInitializeLegacyConstLookupSlot, 3); | |
| 2789 } else { | |
| 2790 DCHECK(var->IsStackAllocated() || var->IsContextSlot()); | |
| 2791 Label skip; | |
| 2792 MemOperand location = VarOperand(var, a1); | |
| 2793 __ lw(a2, location); | |
| 2794 __ LoadRoot(at, Heap::kTheHoleValueRootIndex); | |
| 2795 __ Branch(&skip, ne, a2, Operand(at)); | |
| 2796 EmitStoreToStackLocalOrContextSlot(var, location); | |
| 2797 __ bind(&skip); | |
| 2798 } | |
| 2799 | |
| 2800 } else { | |
| 2801 DCHECK(var->mode() == CONST_LEGACY && op != Token::INIT_CONST_LEGACY); | |
| 2802 if (is_strict(language_mode())) { | |
| 2803 __ CallRuntime(Runtime::kThrowConstAssignError, 0); | |
| 2804 } | |
| 2805 // Silently ignore store in sloppy mode. | |
| 2806 } | |
| 2807 } | |
| 2808 | |
| 2809 | |
| 2810 void FullCodeGenerator::EmitNamedPropertyAssignment(Assignment* expr) { | |
| 2811 // Assignment to a property, using a named store IC. | |
| 2812 Property* prop = expr->target()->AsProperty(); | |
| 2813 DCHECK(prop != NULL); | |
| 2814 DCHECK(prop->key()->IsLiteral()); | |
| 2815 | |
| 2816 __ mov(StoreDescriptor::ValueRegister(), result_register()); | |
| 2817 __ li(StoreDescriptor::NameRegister(), | |
| 2818 Operand(prop->key()->AsLiteral()->value())); | |
| 2819 __ pop(StoreDescriptor::ReceiverRegister()); | |
| 2820 if (FLAG_vector_stores) { | |
| 2821 EmitLoadStoreICSlot(expr->AssignmentSlot()); | |
| 2822 CallStoreIC(); | |
| 2823 } else { | |
| 2824 CallStoreIC(expr->AssignmentFeedbackId()); | |
| 2825 } | |
| 2826 | |
| 2827 PrepareForBailoutForId(expr->AssignmentId(), TOS_REG); | |
| 2828 context()->Plug(v0); | |
| 2829 } | |
| 2830 | |
| 2831 | |
| 2832 void FullCodeGenerator::EmitNamedSuperPropertyStore(Property* prop) { | |
| 2833 // Assignment to named property of super. | |
| 2834 // v0 : value | |
| 2835 // stack : receiver ('this'), home_object | |
| 2836 DCHECK(prop != NULL); | |
| 2837 Literal* key = prop->key()->AsLiteral(); | |
| 2838 DCHECK(key != NULL); | |
| 2839 | |
| 2840 __ Push(key->value()); | |
| 2841 __ Push(v0); | |
| 2842 __ CallRuntime((is_strict(language_mode()) ? Runtime::kStoreToSuper_Strict | |
| 2843 : Runtime::kStoreToSuper_Sloppy), | |
| 2844 4); | |
| 2845 } | |
| 2846 | |
| 2847 | |
| 2848 void FullCodeGenerator::EmitKeyedSuperPropertyStore(Property* prop) { | |
| 2849 // Assignment to named property of super. | |
| 2850 // v0 : value | |
| 2851 // stack : receiver ('this'), home_object, key | |
| 2852 DCHECK(prop != NULL); | |
| 2853 | |
| 2854 __ Push(v0); | |
| 2855 __ CallRuntime( | |
| 2856 (is_strict(language_mode()) ? Runtime::kStoreKeyedToSuper_Strict | |
| 2857 : Runtime::kStoreKeyedToSuper_Sloppy), | |
| 2858 4); | |
| 2859 } | |
| 2860 | |
| 2861 | |
| 2862 void FullCodeGenerator::EmitKeyedPropertyAssignment(Assignment* expr) { | |
| 2863 // Assignment to a property, using a keyed store IC. | |
| 2864 // Call keyed store IC. | |
| 2865 // The arguments are: | |
| 2866 // - a0 is the value, | |
| 2867 // - a1 is the key, | |
| 2868 // - a2 is the receiver. | |
| 2869 __ mov(StoreDescriptor::ValueRegister(), result_register()); | |
| 2870 __ Pop(StoreDescriptor::ReceiverRegister(), StoreDescriptor::NameRegister()); | |
| 2871 DCHECK(StoreDescriptor::ValueRegister().is(a0)); | |
| 2872 | |
| 2873 Handle<Code> ic = | |
| 2874 CodeFactory::KeyedStoreIC(isolate(), language_mode()).code(); | |
| 2875 if (FLAG_vector_stores) { | |
| 2876 EmitLoadStoreICSlot(expr->AssignmentSlot()); | |
| 2877 CallIC(ic); | |
| 2878 } else { | |
| 2879 CallIC(ic, expr->AssignmentFeedbackId()); | |
| 2880 } | |
| 2881 | |
| 2882 PrepareForBailoutForId(expr->AssignmentId(), TOS_REG); | |
| 2883 context()->Plug(v0); | |
| 2884 } | |
| 2885 | |
| 2886 | |
| 2887 void FullCodeGenerator::VisitProperty(Property* expr) { | |
| 2888 Comment cmnt(masm_, "[ Property"); | |
| 2889 SetExpressionPosition(expr); | |
| 2890 | |
| 2891 Expression* key = expr->key(); | |
| 2892 | |
| 2893 if (key->IsPropertyName()) { | |
| 2894 if (!expr->IsSuperAccess()) { | |
| 2895 VisitForAccumulatorValue(expr->obj()); | |
| 2896 __ Move(LoadDescriptor::ReceiverRegister(), v0); | |
| 2897 EmitNamedPropertyLoad(expr); | |
| 2898 } else { | |
| 2899 VisitForStackValue(expr->obj()->AsSuperPropertyReference()->this_var()); | |
| 2900 VisitForStackValue( | |
| 2901 expr->obj()->AsSuperPropertyReference()->home_object()); | |
| 2902 EmitNamedSuperPropertyLoad(expr); | |
| 2903 } | |
| 2904 } else { | |
| 2905 if (!expr->IsSuperAccess()) { | |
| 2906 VisitForStackValue(expr->obj()); | |
| 2907 VisitForAccumulatorValue(expr->key()); | |
| 2908 __ Move(LoadDescriptor::NameRegister(), v0); | |
| 2909 __ pop(LoadDescriptor::ReceiverRegister()); | |
| 2910 EmitKeyedPropertyLoad(expr); | |
| 2911 } else { | |
| 2912 VisitForStackValue(expr->obj()->AsSuperPropertyReference()->this_var()); | |
| 2913 VisitForStackValue( | |
| 2914 expr->obj()->AsSuperPropertyReference()->home_object()); | |
| 2915 VisitForStackValue(expr->key()); | |
| 2916 EmitKeyedSuperPropertyLoad(expr); | |
| 2917 } | |
| 2918 } | |
| 2919 PrepareForBailoutForId(expr->LoadId(), TOS_REG); | |
| 2920 context()->Plug(v0); | |
| 2921 } | |
| 2922 | |
| 2923 | |
| 2924 void FullCodeGenerator::CallIC(Handle<Code> code, | |
| 2925 TypeFeedbackId id) { | |
| 2926 ic_total_count_++; | |
| 2927 __ Call(code, RelocInfo::CODE_TARGET, id); | |
| 2928 } | |
| 2929 | |
| 2930 | |
| 2931 // Code common for calls using the IC. | |
| 2932 void FullCodeGenerator::EmitCallWithLoadIC(Call* expr) { | |
| 2933 Expression* callee = expr->expression(); | |
| 2934 | |
| 2935 CallICState::CallType call_type = | |
| 2936 callee->IsVariableProxy() ? CallICState::FUNCTION : CallICState::METHOD; | |
| 2937 | |
| 2938 // Get the target function. | |
| 2939 if (call_type == CallICState::FUNCTION) { | |
| 2940 { StackValueContext context(this); | |
| 2941 EmitVariableLoad(callee->AsVariableProxy()); | |
| 2942 PrepareForBailout(callee, NO_REGISTERS); | |
| 2943 } | |
| 2944 // Push undefined as receiver. This is patched in the method prologue if it | |
| 2945 // is a sloppy mode method. | |
| 2946 __ LoadRoot(at, Heap::kUndefinedValueRootIndex); | |
| 2947 __ push(at); | |
| 2948 } else { | |
| 2949 // Load the function from the receiver. | |
| 2950 DCHECK(callee->IsProperty()); | |
| 2951 DCHECK(!callee->AsProperty()->IsSuperAccess()); | |
| 2952 __ lw(LoadDescriptor::ReceiverRegister(), MemOperand(sp, 0)); | |
| 2953 EmitNamedPropertyLoad(callee->AsProperty()); | |
| 2954 PrepareForBailoutForId(callee->AsProperty()->LoadId(), TOS_REG); | |
| 2955 // Push the target function under the receiver. | |
| 2956 __ lw(at, MemOperand(sp, 0)); | |
| 2957 __ push(at); | |
| 2958 __ sw(v0, MemOperand(sp, kPointerSize)); | |
| 2959 } | |
| 2960 | |
| 2961 EmitCall(expr, call_type); | |
| 2962 } | |
| 2963 | |
| 2964 | |
| 2965 void FullCodeGenerator::EmitSuperCallWithLoadIC(Call* expr) { | |
| 2966 SetExpressionPosition(expr); | |
| 2967 Expression* callee = expr->expression(); | |
| 2968 DCHECK(callee->IsProperty()); | |
| 2969 Property* prop = callee->AsProperty(); | |
| 2970 DCHECK(prop->IsSuperAccess()); | |
| 2971 | |
| 2972 Literal* key = prop->key()->AsLiteral(); | |
| 2973 DCHECK(!key->value()->IsSmi()); | |
| 2974 // Load the function from the receiver. | |
| 2975 const Register scratch = a1; | |
| 2976 SuperPropertyReference* super_ref = prop->obj()->AsSuperPropertyReference(); | |
| 2977 VisitForAccumulatorValue(super_ref->home_object()); | |
| 2978 __ mov(scratch, v0); | |
| 2979 VisitForAccumulatorValue(super_ref->this_var()); | |
| 2980 __ Push(scratch, v0, v0, scratch); | |
| 2981 __ Push(key->value()); | |
| 2982 __ Push(Smi::FromInt(language_mode())); | |
| 2983 | |
| 2984 // Stack here: | |
| 2985 // - home_object | |
| 2986 // - this (receiver) | |
| 2987 // - this (receiver) <-- LoadFromSuper will pop here and below. | |
| 2988 // - home_object | |
| 2989 // - key | |
| 2990 // - language_mode | |
| 2991 __ CallRuntime(Runtime::kLoadFromSuper, 4); | |
| 2992 | |
| 2993 // Replace home_object with target function. | |
| 2994 __ sw(v0, MemOperand(sp, kPointerSize)); | |
| 2995 | |
| 2996 // Stack here: | |
| 2997 // - target function | |
| 2998 // - this (receiver) | |
| 2999 EmitCall(expr, CallICState::METHOD); | |
| 3000 } | |
| 3001 | |
| 3002 | |
| 3003 // Code common for calls using the IC. | |
| 3004 void FullCodeGenerator::EmitKeyedCallWithLoadIC(Call* expr, | |
| 3005 Expression* key) { | |
| 3006 // Load the key. | |
| 3007 VisitForAccumulatorValue(key); | |
| 3008 | |
| 3009 Expression* callee = expr->expression(); | |
| 3010 | |
| 3011 // Load the function from the receiver. | |
| 3012 DCHECK(callee->IsProperty()); | |
| 3013 __ lw(LoadDescriptor::ReceiverRegister(), MemOperand(sp, 0)); | |
| 3014 __ Move(LoadDescriptor::NameRegister(), v0); | |
| 3015 EmitKeyedPropertyLoad(callee->AsProperty()); | |
| 3016 PrepareForBailoutForId(callee->AsProperty()->LoadId(), TOS_REG); | |
| 3017 | |
| 3018 // Push the target function under the receiver. | |
| 3019 __ lw(at, MemOperand(sp, 0)); | |
| 3020 __ push(at); | |
| 3021 __ sw(v0, MemOperand(sp, kPointerSize)); | |
| 3022 | |
| 3023 EmitCall(expr, CallICState::METHOD); | |
| 3024 } | |
| 3025 | |
| 3026 | |
| 3027 void FullCodeGenerator::EmitKeyedSuperCallWithLoadIC(Call* expr) { | |
| 3028 Expression* callee = expr->expression(); | |
| 3029 DCHECK(callee->IsProperty()); | |
| 3030 Property* prop = callee->AsProperty(); | |
| 3031 DCHECK(prop->IsSuperAccess()); | |
| 3032 | |
| 3033 SetExpressionPosition(prop); | |
| 3034 // Load the function from the receiver. | |
| 3035 const Register scratch = a1; | |
| 3036 SuperPropertyReference* super_ref = prop->obj()->AsSuperPropertyReference(); | |
| 3037 VisitForAccumulatorValue(super_ref->home_object()); | |
| 3038 __ Move(scratch, v0); | |
| 3039 VisitForAccumulatorValue(super_ref->this_var()); | |
| 3040 __ Push(scratch, v0, v0, scratch); | |
| 3041 VisitForStackValue(prop->key()); | |
| 3042 __ Push(Smi::FromInt(language_mode())); | |
| 3043 | |
| 3044 // Stack here: | |
| 3045 // - home_object | |
| 3046 // - this (receiver) | |
| 3047 // - this (receiver) <-- LoadKeyedFromSuper will pop here and below. | |
| 3048 // - home_object | |
| 3049 // - key | |
| 3050 // - language_mode | |
| 3051 __ CallRuntime(Runtime::kLoadKeyedFromSuper, 4); | |
| 3052 | |
| 3053 // Replace home_object with target function. | |
| 3054 __ sw(v0, MemOperand(sp, kPointerSize)); | |
| 3055 | |
| 3056 // Stack here: | |
| 3057 // - target function | |
| 3058 // - this (receiver) | |
| 3059 EmitCall(expr, CallICState::METHOD); | |
| 3060 } | |
| 3061 | |
| 3062 | |
| 3063 void FullCodeGenerator::EmitCall(Call* expr, CallICState::CallType call_type) { | |
| 3064 // Load the arguments. | |
| 3065 ZoneList<Expression*>* args = expr->arguments(); | |
| 3066 int arg_count = args->length(); | |
| 3067 for (int i = 0; i < arg_count; i++) { | |
| 3068 VisitForStackValue(args->at(i)); | |
| 3069 } | |
| 3070 | |
| 3071 // Record source position of the IC call. | |
| 3072 SetCallPosition(expr, arg_count); | |
| 3073 Handle<Code> ic = CodeFactory::CallIC(isolate(), arg_count, call_type).code(); | |
| 3074 __ li(a3, Operand(SmiFromSlot(expr->CallFeedbackICSlot()))); | |
| 3075 __ lw(a1, MemOperand(sp, (arg_count + 1) * kPointerSize)); | |
| 3076 // Don't assign a type feedback id to the IC, since type feedback is provided | |
| 3077 // by the vector above. | |
| 3078 CallIC(ic); | |
| 3079 | |
| 3080 RecordJSReturnSite(expr); | |
| 3081 // Restore context register. | |
| 3082 __ lw(cp, MemOperand(fp, StandardFrameConstants::kContextOffset)); | |
| 3083 context()->DropAndPlug(1, v0); | |
| 3084 } | |
| 3085 | |
| 3086 | |
| 3087 void FullCodeGenerator::EmitResolvePossiblyDirectEval(int arg_count) { | |
| 3088 // t3: copy of the first argument or undefined if it doesn't exist. | |
| 3089 if (arg_count > 0) { | |
| 3090 __ lw(t3, MemOperand(sp, arg_count * kPointerSize)); | |
| 3091 } else { | |
| 3092 __ LoadRoot(t3, Heap::kUndefinedValueRootIndex); | |
| 3093 } | |
| 3094 | |
| 3095 // t2: the receiver of the enclosing function. | |
| 3096 __ lw(t2, MemOperand(fp, JavaScriptFrameConstants::kFunctionOffset)); | |
| 3097 | |
| 3098 // t1: the language mode. | |
| 3099 __ li(t1, Operand(Smi::FromInt(language_mode()))); | |
| 3100 | |
| 3101 // t0: the start position of the scope the calls resides in. | |
| 3102 __ li(t0, Operand(Smi::FromInt(scope()->start_position()))); | |
| 3103 | |
| 3104 // Do the runtime call. | |
| 3105 __ Push(t3, t2, t1, t0); | |
| 3106 __ CallRuntime(Runtime::kResolvePossiblyDirectEval, 5); | |
| 3107 } | |
| 3108 | |
| 3109 | |
| 3110 // See http://www.ecma-international.org/ecma-262/6.0/#sec-function-calls. | |
| 3111 void FullCodeGenerator::PushCalleeAndWithBaseObject(Call* expr) { | |
| 3112 VariableProxy* callee = expr->expression()->AsVariableProxy(); | |
| 3113 if (callee->var()->IsLookupSlot()) { | |
| 3114 Label slow, done; | |
| 3115 | |
| 3116 SetExpressionPosition(callee); | |
| 3117 // Generate code for loading from variables potentially shadowed by | |
| 3118 // eval-introduced variables. | |
| 3119 EmitDynamicLookupFastCase(callee, NOT_INSIDE_TYPEOF, &slow, &done); | |
| 3120 | |
| 3121 __ bind(&slow); | |
| 3122 // Call the runtime to find the function to call (returned in v0) | |
| 3123 // and the object holding it (returned in v1). | |
| 3124 DCHECK(!context_register().is(a2)); | |
| 3125 __ li(a2, Operand(callee->name())); | |
| 3126 __ Push(context_register(), a2); | |
| 3127 __ CallRuntime(Runtime::kLoadLookupSlot, 2); | |
| 3128 __ Push(v0, v1); // Function, receiver. | |
| 3129 PrepareForBailoutForId(expr->LookupId(), NO_REGISTERS); | |
| 3130 | |
| 3131 // If fast case code has been generated, emit code to push the | |
| 3132 // function and receiver and have the slow path jump around this | |
| 3133 // code. | |
| 3134 if (done.is_linked()) { | |
| 3135 Label call; | |
| 3136 __ Branch(&call); | |
| 3137 __ bind(&done); | |
| 3138 // Push function. | |
| 3139 __ push(v0); | |
| 3140 // The receiver is implicitly the global receiver. Indicate this | |
| 3141 // by passing the hole to the call function stub. | |
| 3142 __ LoadRoot(a1, Heap::kUndefinedValueRootIndex); | |
| 3143 __ push(a1); | |
| 3144 __ bind(&call); | |
| 3145 } | |
| 3146 } else { | |
| 3147 VisitForStackValue(callee); | |
| 3148 // refEnv.WithBaseObject() | |
| 3149 __ LoadRoot(a2, Heap::kUndefinedValueRootIndex); | |
| 3150 __ push(a2); // Reserved receiver slot. | |
| 3151 } | |
| 3152 } | |
| 3153 | |
| 3154 | |
| 3155 void FullCodeGenerator::VisitCall(Call* expr) { | |
| 3156 #ifdef DEBUG | |
| 3157 // We want to verify that RecordJSReturnSite gets called on all paths | |
| 3158 // through this function. Avoid early returns. | |
| 3159 expr->return_is_recorded_ = false; | |
| 3160 #endif | |
| 3161 | |
| 3162 Comment cmnt(masm_, "[ Call"); | |
| 3163 Expression* callee = expr->expression(); | |
| 3164 Call::CallType call_type = expr->GetCallType(isolate()); | |
| 3165 | |
| 3166 if (call_type == Call::POSSIBLY_EVAL_CALL) { | |
| 3167 // In a call to eval, we first call RuntimeHidden_ResolvePossiblyDirectEval | |
| 3168 // to resolve the function we need to call. Then we call the resolved | |
| 3169 // function using the given arguments. | |
| 3170 ZoneList<Expression*>* args = expr->arguments(); | |
| 3171 int arg_count = args->length(); | |
| 3172 PushCalleeAndWithBaseObject(expr); | |
| 3173 | |
| 3174 // Push the arguments. | |
| 3175 for (int i = 0; i < arg_count; i++) { | |
| 3176 VisitForStackValue(args->at(i)); | |
| 3177 } | |
| 3178 | |
| 3179 // Push a copy of the function (found below the arguments) and | |
| 3180 // resolve eval. | |
| 3181 __ lw(a1, MemOperand(sp, (arg_count + 1) * kPointerSize)); | |
| 3182 __ push(a1); | |
| 3183 EmitResolvePossiblyDirectEval(arg_count); | |
| 3184 | |
| 3185 // Touch up the stack with the resolved function. | |
| 3186 __ sw(v0, MemOperand(sp, (arg_count + 1) * kPointerSize)); | |
| 3187 | |
| 3188 PrepareForBailoutForId(expr->EvalId(), NO_REGISTERS); | |
| 3189 // Record source position for debugger. | |
| 3190 SetCallPosition(expr, arg_count); | |
| 3191 CallFunctionStub stub(isolate(), arg_count, NO_CALL_FUNCTION_FLAGS); | |
| 3192 __ lw(a1, MemOperand(sp, (arg_count + 1) * kPointerSize)); | |
| 3193 __ CallStub(&stub); | |
| 3194 RecordJSReturnSite(expr); | |
| 3195 // Restore context register. | |
| 3196 __ lw(cp, MemOperand(fp, StandardFrameConstants::kContextOffset)); | |
| 3197 context()->DropAndPlug(1, v0); | |
| 3198 } else if (call_type == Call::GLOBAL_CALL) { | |
| 3199 EmitCallWithLoadIC(expr); | |
| 3200 } else if (call_type == Call::LOOKUP_SLOT_CALL) { | |
| 3201 // Call to a lookup slot (dynamically introduced variable). | |
| 3202 PushCalleeAndWithBaseObject(expr); | |
| 3203 EmitCall(expr); | |
| 3204 } else if (call_type == Call::PROPERTY_CALL) { | |
| 3205 Property* property = callee->AsProperty(); | |
| 3206 bool is_named_call = property->key()->IsPropertyName(); | |
| 3207 if (property->IsSuperAccess()) { | |
| 3208 if (is_named_call) { | |
| 3209 EmitSuperCallWithLoadIC(expr); | |
| 3210 } else { | |
| 3211 EmitKeyedSuperCallWithLoadIC(expr); | |
| 3212 } | |
| 3213 } else { | |
| 3214 VisitForStackValue(property->obj()); | |
| 3215 if (is_named_call) { | |
| 3216 EmitCallWithLoadIC(expr); | |
| 3217 } else { | |
| 3218 EmitKeyedCallWithLoadIC(expr, property->key()); | |
| 3219 } | |
| 3220 } | |
| 3221 } else if (call_type == Call::SUPER_CALL) { | |
| 3222 EmitSuperConstructorCall(expr); | |
| 3223 } else { | |
| 3224 DCHECK(call_type == Call::OTHER_CALL); | |
| 3225 // Call to an arbitrary expression not handled specially above. | |
| 3226 VisitForStackValue(callee); | |
| 3227 __ LoadRoot(a1, Heap::kUndefinedValueRootIndex); | |
| 3228 __ push(a1); | |
| 3229 // Emit function call. | |
| 3230 EmitCall(expr); | |
| 3231 } | |
| 3232 | |
| 3233 #ifdef DEBUG | |
| 3234 // RecordJSReturnSite should have been called. | |
| 3235 DCHECK(expr->return_is_recorded_); | |
| 3236 #endif | |
| 3237 } | |
| 3238 | |
| 3239 | |
| 3240 void FullCodeGenerator::VisitCallNew(CallNew* expr) { | |
| 3241 Comment cmnt(masm_, "[ CallNew"); | |
| 3242 // According to ECMA-262, section 11.2.2, page 44, the function | |
| 3243 // expression in new calls must be evaluated before the | |
| 3244 // arguments. | |
| 3245 | |
| 3246 // Push constructor on the stack. If it's not a function it's used as | |
| 3247 // receiver for CALL_NON_FUNCTION, otherwise the value on the stack is | |
| 3248 // ignored. | |
| 3249 DCHECK(!expr->expression()->IsSuperPropertyReference()); | |
| 3250 VisitForStackValue(expr->expression()); | |
| 3251 | |
| 3252 // Push the arguments ("left-to-right") on the stack. | |
| 3253 ZoneList<Expression*>* args = expr->arguments(); | |
| 3254 int arg_count = args->length(); | |
| 3255 for (int i = 0; i < arg_count; i++) { | |
| 3256 VisitForStackValue(args->at(i)); | |
| 3257 } | |
| 3258 | |
| 3259 // Call the construct call builtin that handles allocation and | |
| 3260 // constructor invocation. | |
| 3261 SetConstructCallPosition(expr); | |
| 3262 | |
| 3263 // Load function and argument count into a1 and a0. | |
| 3264 __ li(a0, Operand(arg_count)); | |
| 3265 __ lw(a1, MemOperand(sp, arg_count * kPointerSize)); | |
| 3266 | |
| 3267 // Record call targets in unoptimized code. | |
| 3268 if (FLAG_pretenuring_call_new) { | |
| 3269 EnsureSlotContainsAllocationSite(expr->AllocationSiteFeedbackSlot()); | |
| 3270 DCHECK(expr->AllocationSiteFeedbackSlot().ToInt() == | |
| 3271 expr->CallNewFeedbackSlot().ToInt() + 1); | |
| 3272 } | |
| 3273 | |
| 3274 __ li(a2, FeedbackVector()); | |
| 3275 __ li(a3, Operand(SmiFromSlot(expr->CallNewFeedbackSlot()))); | |
| 3276 | |
| 3277 CallConstructStub stub(isolate(), RECORD_CONSTRUCTOR_TARGET); | |
| 3278 __ Call(stub.GetCode(), RelocInfo::CONSTRUCT_CALL); | |
| 3279 PrepareForBailoutForId(expr->ReturnId(), TOS_REG); | |
| 3280 context()->Plug(v0); | |
| 3281 } | |
| 3282 | |
| 3283 | |
| 3284 void FullCodeGenerator::EmitSuperConstructorCall(Call* expr) { | |
| 3285 SuperCallReference* super_call_ref = | |
| 3286 expr->expression()->AsSuperCallReference(); | |
| 3287 DCHECK_NOT_NULL(super_call_ref); | |
| 3288 | |
| 3289 EmitLoadSuperConstructor(super_call_ref); | |
| 3290 __ push(result_register()); | |
| 3291 | |
| 3292 // Push the arguments ("left-to-right") on the stack. | |
| 3293 ZoneList<Expression*>* args = expr->arguments(); | |
| 3294 int arg_count = args->length(); | |
| 3295 for (int i = 0; i < arg_count; i++) { | |
| 3296 VisitForStackValue(args->at(i)); | |
| 3297 } | |
| 3298 | |
| 3299 // Call the construct call builtin that handles allocation and | |
| 3300 // constructor invocation. | |
| 3301 SetConstructCallPosition(expr); | |
| 3302 | |
| 3303 // Load original constructor into t0. | |
| 3304 VisitForAccumulatorValue(super_call_ref->new_target_var()); | |
| 3305 __ mov(t0, result_register()); | |
| 3306 | |
| 3307 // Load function and argument count into a1 and a0. | |
| 3308 __ li(a0, Operand(arg_count)); | |
| 3309 __ lw(a1, MemOperand(sp, arg_count * kPointerSize)); | |
| 3310 | |
| 3311 // Record call targets in unoptimized code. | |
| 3312 if (FLAG_pretenuring_call_new) { | |
| 3313 UNREACHABLE(); | |
| 3314 /* TODO(dslomov): support pretenuring. | |
| 3315 EnsureSlotContainsAllocationSite(expr->AllocationSiteFeedbackSlot()); | |
| 3316 DCHECK(expr->AllocationSiteFeedbackSlot().ToInt() == | |
| 3317 expr->CallNewFeedbackSlot().ToInt() + 1); | |
| 3318 */ | |
| 3319 } | |
| 3320 | |
| 3321 __ li(a2, FeedbackVector()); | |
| 3322 __ li(a3, Operand(SmiFromSlot(expr->CallFeedbackSlot()))); | |
| 3323 | |
| 3324 CallConstructStub stub(isolate(), SUPER_CALL_RECORD_TARGET); | |
| 3325 __ Call(stub.GetCode(), RelocInfo::CONSTRUCT_CALL); | |
| 3326 | |
| 3327 RecordJSReturnSite(expr); | |
| 3328 | |
| 3329 context()->Plug(v0); | |
| 3330 } | |
| 3331 | |
| 3332 | |
| 3333 void FullCodeGenerator::EmitIsSmi(CallRuntime* expr) { | |
| 3334 ZoneList<Expression*>* args = expr->arguments(); | |
| 3335 DCHECK(args->length() == 1); | |
| 3336 | |
| 3337 VisitForAccumulatorValue(args->at(0)); | |
| 3338 | |
| 3339 Label materialize_true, materialize_false; | |
| 3340 Label* if_true = NULL; | |
| 3341 Label* if_false = NULL; | |
| 3342 Label* fall_through = NULL; | |
| 3343 context()->PrepareTest(&materialize_true, &materialize_false, | |
| 3344 &if_true, &if_false, &fall_through); | |
| 3345 | |
| 3346 PrepareForBailoutBeforeSplit(expr, true, if_true, if_false); | |
| 3347 __ SmiTst(v0, t0); | |
| 3348 Split(eq, t0, Operand(zero_reg), if_true, if_false, fall_through); | |
| 3349 | |
| 3350 context()->Plug(if_true, if_false); | |
| 3351 } | |
| 3352 | |
| 3353 | |
| 3354 void FullCodeGenerator::EmitIsNonNegativeSmi(CallRuntime* expr) { | |
| 3355 ZoneList<Expression*>* args = expr->arguments(); | |
| 3356 DCHECK(args->length() == 1); | |
| 3357 | |
| 3358 VisitForAccumulatorValue(args->at(0)); | |
| 3359 | |
| 3360 Label materialize_true, materialize_false; | |
| 3361 Label* if_true = NULL; | |
| 3362 Label* if_false = NULL; | |
| 3363 Label* fall_through = NULL; | |
| 3364 context()->PrepareTest(&materialize_true, &materialize_false, | |
| 3365 &if_true, &if_false, &fall_through); | |
| 3366 | |
| 3367 PrepareForBailoutBeforeSplit(expr, true, if_true, if_false); | |
| 3368 __ NonNegativeSmiTst(v0, at); | |
| 3369 Split(eq, at, Operand(zero_reg), if_true, if_false, fall_through); | |
| 3370 | |
| 3371 context()->Plug(if_true, if_false); | |
| 3372 } | |
| 3373 | |
| 3374 | |
| 3375 void FullCodeGenerator::EmitIsObject(CallRuntime* expr) { | |
| 3376 ZoneList<Expression*>* args = expr->arguments(); | |
| 3377 DCHECK(args->length() == 1); | |
| 3378 | |
| 3379 VisitForAccumulatorValue(args->at(0)); | |
| 3380 | |
| 3381 Label materialize_true, materialize_false; | |
| 3382 Label* if_true = NULL; | |
| 3383 Label* if_false = NULL; | |
| 3384 Label* fall_through = NULL; | |
| 3385 context()->PrepareTest(&materialize_true, &materialize_false, | |
| 3386 &if_true, &if_false, &fall_through); | |
| 3387 | |
| 3388 __ JumpIfSmi(v0, if_false); | |
| 3389 __ LoadRoot(at, Heap::kNullValueRootIndex); | |
| 3390 __ Branch(if_true, eq, v0, Operand(at)); | |
| 3391 __ lw(a2, FieldMemOperand(v0, HeapObject::kMapOffset)); | |
| 3392 // Undetectable objects behave like undefined when tested with typeof. | |
| 3393 __ lbu(a1, FieldMemOperand(a2, Map::kBitFieldOffset)); | |
| 3394 __ And(at, a1, Operand(1 << Map::kIsUndetectable)); | |
| 3395 __ Branch(if_false, ne, at, Operand(zero_reg)); | |
| 3396 __ lbu(a1, FieldMemOperand(a2, Map::kInstanceTypeOffset)); | |
| 3397 __ Branch(if_false, lt, a1, Operand(FIRST_NONCALLABLE_SPEC_OBJECT_TYPE)); | |
| 3398 PrepareForBailoutBeforeSplit(expr, true, if_true, if_false); | |
| 3399 Split(le, a1, Operand(LAST_NONCALLABLE_SPEC_OBJECT_TYPE), | |
| 3400 if_true, if_false, fall_through); | |
| 3401 | |
| 3402 context()->Plug(if_true, if_false); | |
| 3403 } | |
| 3404 | |
| 3405 | |
| 3406 void FullCodeGenerator::EmitIsSpecObject(CallRuntime* expr) { | |
| 3407 ZoneList<Expression*>* args = expr->arguments(); | |
| 3408 DCHECK(args->length() == 1); | |
| 3409 | |
| 3410 VisitForAccumulatorValue(args->at(0)); | |
| 3411 | |
| 3412 Label materialize_true, materialize_false; | |
| 3413 Label* if_true = NULL; | |
| 3414 Label* if_false = NULL; | |
| 3415 Label* fall_through = NULL; | |
| 3416 context()->PrepareTest(&materialize_true, &materialize_false, | |
| 3417 &if_true, &if_false, &fall_through); | |
| 3418 | |
| 3419 __ JumpIfSmi(v0, if_false); | |
| 3420 __ GetObjectType(v0, a1, a1); | |
| 3421 PrepareForBailoutBeforeSplit(expr, true, if_true, if_false); | |
| 3422 Split(ge, a1, Operand(FIRST_SPEC_OBJECT_TYPE), | |
| 3423 if_true, if_false, fall_through); | |
| 3424 | |
| 3425 context()->Plug(if_true, if_false); | |
| 3426 } | |
| 3427 | |
| 3428 | |
| 3429 void FullCodeGenerator::EmitIsUndetectableObject(CallRuntime* expr) { | |
| 3430 ZoneList<Expression*>* args = expr->arguments(); | |
| 3431 DCHECK(args->length() == 1); | |
| 3432 | |
| 3433 VisitForAccumulatorValue(args->at(0)); | |
| 3434 | |
| 3435 Label materialize_true, materialize_false; | |
| 3436 Label* if_true = NULL; | |
| 3437 Label* if_false = NULL; | |
| 3438 Label* fall_through = NULL; | |
| 3439 context()->PrepareTest(&materialize_true, &materialize_false, | |
| 3440 &if_true, &if_false, &fall_through); | |
| 3441 | |
| 3442 __ JumpIfSmi(v0, if_false); | |
| 3443 __ lw(a1, FieldMemOperand(v0, HeapObject::kMapOffset)); | |
| 3444 __ lbu(a1, FieldMemOperand(a1, Map::kBitFieldOffset)); | |
| 3445 PrepareForBailoutBeforeSplit(expr, true, if_true, if_false); | |
| 3446 __ And(at, a1, Operand(1 << Map::kIsUndetectable)); | |
| 3447 Split(ne, at, Operand(zero_reg), if_true, if_false, fall_through); | |
| 3448 | |
| 3449 context()->Plug(if_true, if_false); | |
| 3450 } | |
| 3451 | |
| 3452 | |
| 3453 void FullCodeGenerator::EmitIsStringWrapperSafeForDefaultValueOf( | |
| 3454 CallRuntime* expr) { | |
| 3455 ZoneList<Expression*>* args = expr->arguments(); | |
| 3456 DCHECK(args->length() == 1); | |
| 3457 | |
| 3458 VisitForAccumulatorValue(args->at(0)); | |
| 3459 | |
| 3460 Label materialize_true, materialize_false, skip_lookup; | |
| 3461 Label* if_true = NULL; | |
| 3462 Label* if_false = NULL; | |
| 3463 Label* fall_through = NULL; | |
| 3464 context()->PrepareTest(&materialize_true, &materialize_false, | |
| 3465 &if_true, &if_false, &fall_through); | |
| 3466 | |
| 3467 __ AssertNotSmi(v0); | |
| 3468 | |
| 3469 __ lw(a1, FieldMemOperand(v0, HeapObject::kMapOffset)); | |
| 3470 __ lbu(t0, FieldMemOperand(a1, Map::kBitField2Offset)); | |
| 3471 __ And(t0, t0, 1 << Map::kStringWrapperSafeForDefaultValueOf); | |
| 3472 __ Branch(&skip_lookup, ne, t0, Operand(zero_reg)); | |
| 3473 | |
| 3474 // Check for fast case object. Generate false result for slow case object. | |
| 3475 __ lw(a2, FieldMemOperand(v0, JSObject::kPropertiesOffset)); | |
| 3476 __ lw(a2, FieldMemOperand(a2, HeapObject::kMapOffset)); | |
| 3477 __ LoadRoot(t0, Heap::kHashTableMapRootIndex); | |
| 3478 __ Branch(if_false, eq, a2, Operand(t0)); | |
| 3479 | |
| 3480 // Look for valueOf name in the descriptor array, and indicate false if | |
| 3481 // found. Since we omit an enumeration index check, if it is added via a | |
| 3482 // transition that shares its descriptor array, this is a false positive. | |
| 3483 Label entry, loop, done; | |
| 3484 | |
| 3485 // Skip loop if no descriptors are valid. | |
| 3486 __ NumberOfOwnDescriptors(a3, a1); | |
| 3487 __ Branch(&done, eq, a3, Operand(zero_reg)); | |
| 3488 | |
| 3489 __ LoadInstanceDescriptors(a1, t0); | |
| 3490 // t0: descriptor array. | |
| 3491 // a3: valid entries in the descriptor array. | |
| 3492 STATIC_ASSERT(kSmiTag == 0); | |
| 3493 STATIC_ASSERT(kSmiTagSize == 1); | |
| 3494 STATIC_ASSERT(kPointerSize == 4); | |
| 3495 __ li(at, Operand(DescriptorArray::kDescriptorSize)); | |
| 3496 __ Mul(a3, a3, at); | |
| 3497 // Calculate location of the first key name. | |
| 3498 __ Addu(t0, t0, Operand(DescriptorArray::kFirstOffset - kHeapObjectTag)); | |
| 3499 // Calculate the end of the descriptor array. | |
| 3500 __ mov(a2, t0); | |
| 3501 __ sll(t1, a3, kPointerSizeLog2); | |
| 3502 __ Addu(a2, a2, t1); | |
| 3503 | |
| 3504 // Loop through all the keys in the descriptor array. If one of these is the | |
| 3505 // string "valueOf" the result is false. | |
| 3506 // The use of t2 to store the valueOf string assumes that it is not otherwise | |
| 3507 // used in the loop below. | |
| 3508 __ li(t2, Operand(isolate()->factory()->value_of_string())); | |
| 3509 __ jmp(&entry); | |
| 3510 __ bind(&loop); | |
| 3511 __ lw(a3, MemOperand(t0, 0)); | |
| 3512 __ Branch(if_false, eq, a3, Operand(t2)); | |
| 3513 __ Addu(t0, t0, Operand(DescriptorArray::kDescriptorSize * kPointerSize)); | |
| 3514 __ bind(&entry); | |
| 3515 __ Branch(&loop, ne, t0, Operand(a2)); | |
| 3516 | |
| 3517 __ bind(&done); | |
| 3518 | |
| 3519 // Set the bit in the map to indicate that there is no local valueOf field. | |
| 3520 __ lbu(a2, FieldMemOperand(a1, Map::kBitField2Offset)); | |
| 3521 __ Or(a2, a2, Operand(1 << Map::kStringWrapperSafeForDefaultValueOf)); | |
| 3522 __ sb(a2, FieldMemOperand(a1, Map::kBitField2Offset)); | |
| 3523 | |
| 3524 __ bind(&skip_lookup); | |
| 3525 | |
| 3526 // If a valueOf property is not found on the object check that its | |
| 3527 // prototype is the un-modified String prototype. If not result is false. | |
| 3528 __ lw(a2, FieldMemOperand(a1, Map::kPrototypeOffset)); | |
| 3529 __ JumpIfSmi(a2, if_false); | |
| 3530 __ lw(a2, FieldMemOperand(a2, HeapObject::kMapOffset)); | |
| 3531 __ lw(a3, ContextOperand(cp, Context::GLOBAL_OBJECT_INDEX)); | |
| 3532 __ lw(a3, FieldMemOperand(a3, GlobalObject::kNativeContextOffset)); | |
| 3533 __ lw(a3, ContextOperand(a3, Context::STRING_FUNCTION_PROTOTYPE_MAP_INDEX)); | |
| 3534 PrepareForBailoutBeforeSplit(expr, true, if_true, if_false); | |
| 3535 Split(eq, a2, Operand(a3), if_true, if_false, fall_through); | |
| 3536 | |
| 3537 context()->Plug(if_true, if_false); | |
| 3538 } | |
| 3539 | |
| 3540 | |
| 3541 void FullCodeGenerator::EmitIsFunction(CallRuntime* expr) { | |
| 3542 ZoneList<Expression*>* args = expr->arguments(); | |
| 3543 DCHECK(args->length() == 1); | |
| 3544 | |
| 3545 VisitForAccumulatorValue(args->at(0)); | |
| 3546 | |
| 3547 Label materialize_true, materialize_false; | |
| 3548 Label* if_true = NULL; | |
| 3549 Label* if_false = NULL; | |
| 3550 Label* fall_through = NULL; | |
| 3551 context()->PrepareTest(&materialize_true, &materialize_false, | |
| 3552 &if_true, &if_false, &fall_through); | |
| 3553 | |
| 3554 __ JumpIfSmi(v0, if_false); | |
| 3555 __ GetObjectType(v0, a1, a2); | |
| 3556 PrepareForBailoutBeforeSplit(expr, true, if_true, if_false); | |
| 3557 __ Branch(if_true, eq, a2, Operand(JS_FUNCTION_TYPE)); | |
| 3558 __ Branch(if_false); | |
| 3559 | |
| 3560 context()->Plug(if_true, if_false); | |
| 3561 } | |
| 3562 | |
| 3563 | |
| 3564 void FullCodeGenerator::EmitIsMinusZero(CallRuntime* expr) { | |
| 3565 ZoneList<Expression*>* args = expr->arguments(); | |
| 3566 DCHECK(args->length() == 1); | |
| 3567 | |
| 3568 VisitForAccumulatorValue(args->at(0)); | |
| 3569 | |
| 3570 Label materialize_true, materialize_false; | |
| 3571 Label* if_true = NULL; | |
| 3572 Label* if_false = NULL; | |
| 3573 Label* fall_through = NULL; | |
| 3574 context()->PrepareTest(&materialize_true, &materialize_false, | |
| 3575 &if_true, &if_false, &fall_through); | |
| 3576 | |
| 3577 __ CheckMap(v0, a1, Heap::kHeapNumberMapRootIndex, if_false, DO_SMI_CHECK); | |
| 3578 __ lw(a2, FieldMemOperand(v0, HeapNumber::kExponentOffset)); | |
| 3579 __ lw(a1, FieldMemOperand(v0, HeapNumber::kMantissaOffset)); | |
| 3580 __ li(t0, 0x80000000); | |
| 3581 Label not_nan; | |
| 3582 __ Branch(¬_nan, ne, a2, Operand(t0)); | |
| 3583 __ mov(t0, zero_reg); | |
| 3584 __ mov(a2, a1); | |
| 3585 __ bind(¬_nan); | |
| 3586 | |
| 3587 PrepareForBailoutBeforeSplit(expr, true, if_true, if_false); | |
| 3588 Split(eq, a2, Operand(t0), if_true, if_false, fall_through); | |
| 3589 | |
| 3590 context()->Plug(if_true, if_false); | |
| 3591 } | |
| 3592 | |
| 3593 | |
| 3594 void FullCodeGenerator::EmitIsArray(CallRuntime* expr) { | |
| 3595 ZoneList<Expression*>* args = expr->arguments(); | |
| 3596 DCHECK(args->length() == 1); | |
| 3597 | |
| 3598 VisitForAccumulatorValue(args->at(0)); | |
| 3599 | |
| 3600 Label materialize_true, materialize_false; | |
| 3601 Label* if_true = NULL; | |
| 3602 Label* if_false = NULL; | |
| 3603 Label* fall_through = NULL; | |
| 3604 context()->PrepareTest(&materialize_true, &materialize_false, | |
| 3605 &if_true, &if_false, &fall_through); | |
| 3606 | |
| 3607 __ JumpIfSmi(v0, if_false); | |
| 3608 __ GetObjectType(v0, a1, a1); | |
| 3609 PrepareForBailoutBeforeSplit(expr, true, if_true, if_false); | |
| 3610 Split(eq, a1, Operand(JS_ARRAY_TYPE), | |
| 3611 if_true, if_false, fall_through); | |
| 3612 | |
| 3613 context()->Plug(if_true, if_false); | |
| 3614 } | |
| 3615 | |
| 3616 | |
| 3617 void FullCodeGenerator::EmitIsTypedArray(CallRuntime* expr) { | |
| 3618 ZoneList<Expression*>* args = expr->arguments(); | |
| 3619 DCHECK(args->length() == 1); | |
| 3620 | |
| 3621 VisitForAccumulatorValue(args->at(0)); | |
| 3622 | |
| 3623 Label materialize_true, materialize_false; | |
| 3624 Label* if_true = NULL; | |
| 3625 Label* if_false = NULL; | |
| 3626 Label* fall_through = NULL; | |
| 3627 context()->PrepareTest(&materialize_true, &materialize_false, &if_true, | |
| 3628 &if_false, &fall_through); | |
| 3629 | |
| 3630 __ JumpIfSmi(v0, if_false); | |
| 3631 __ GetObjectType(v0, a1, a1); | |
| 3632 PrepareForBailoutBeforeSplit(expr, true, if_true, if_false); | |
| 3633 Split(eq, a1, Operand(JS_TYPED_ARRAY_TYPE), if_true, if_false, fall_through); | |
| 3634 | |
| 3635 context()->Plug(if_true, if_false); | |
| 3636 } | |
| 3637 | |
| 3638 | |
| 3639 void FullCodeGenerator::EmitIsRegExp(CallRuntime* expr) { | |
| 3640 ZoneList<Expression*>* args = expr->arguments(); | |
| 3641 DCHECK(args->length() == 1); | |
| 3642 | |
| 3643 VisitForAccumulatorValue(args->at(0)); | |
| 3644 | |
| 3645 Label materialize_true, materialize_false; | |
| 3646 Label* if_true = NULL; | |
| 3647 Label* if_false = NULL; | |
| 3648 Label* fall_through = NULL; | |
| 3649 context()->PrepareTest(&materialize_true, &materialize_false, | |
| 3650 &if_true, &if_false, &fall_through); | |
| 3651 | |
| 3652 __ JumpIfSmi(v0, if_false); | |
| 3653 __ GetObjectType(v0, a1, a1); | |
| 3654 PrepareForBailoutBeforeSplit(expr, true, if_true, if_false); | |
| 3655 Split(eq, a1, Operand(JS_REGEXP_TYPE), if_true, if_false, fall_through); | |
| 3656 | |
| 3657 context()->Plug(if_true, if_false); | |
| 3658 } | |
| 3659 | |
| 3660 | |
| 3661 void FullCodeGenerator::EmitIsJSProxy(CallRuntime* expr) { | |
| 3662 ZoneList<Expression*>* args = expr->arguments(); | |
| 3663 DCHECK(args->length() == 1); | |
| 3664 | |
| 3665 VisitForAccumulatorValue(args->at(0)); | |
| 3666 | |
| 3667 Label materialize_true, materialize_false; | |
| 3668 Label* if_true = NULL; | |
| 3669 Label* if_false = NULL; | |
| 3670 Label* fall_through = NULL; | |
| 3671 context()->PrepareTest(&materialize_true, &materialize_false, &if_true, | |
| 3672 &if_false, &fall_through); | |
| 3673 | |
| 3674 __ JumpIfSmi(v0, if_false); | |
| 3675 Register map = a1; | |
| 3676 Register type_reg = a2; | |
| 3677 __ GetObjectType(v0, map, type_reg); | |
| 3678 __ Subu(type_reg, type_reg, Operand(FIRST_JS_PROXY_TYPE)); | |
| 3679 PrepareForBailoutBeforeSplit(expr, true, if_true, if_false); | |
| 3680 Split(ls, type_reg, Operand(LAST_JS_PROXY_TYPE - FIRST_JS_PROXY_TYPE), | |
| 3681 if_true, if_false, fall_through); | |
| 3682 | |
| 3683 context()->Plug(if_true, if_false); | |
| 3684 } | |
| 3685 | |
| 3686 | |
| 3687 void FullCodeGenerator::EmitIsConstructCall(CallRuntime* expr) { | |
| 3688 DCHECK(expr->arguments()->length() == 0); | |
| 3689 | |
| 3690 Label materialize_true, materialize_false; | |
| 3691 Label* if_true = NULL; | |
| 3692 Label* if_false = NULL; | |
| 3693 Label* fall_through = NULL; | |
| 3694 context()->PrepareTest(&materialize_true, &materialize_false, | |
| 3695 &if_true, &if_false, &fall_through); | |
| 3696 | |
| 3697 // Get the frame pointer for the calling frame. | |
| 3698 __ lw(a2, MemOperand(fp, StandardFrameConstants::kCallerFPOffset)); | |
| 3699 | |
| 3700 // Skip the arguments adaptor frame if it exists. | |
| 3701 Label check_frame_marker; | |
| 3702 __ lw(a1, MemOperand(a2, StandardFrameConstants::kContextOffset)); | |
| 3703 __ Branch(&check_frame_marker, ne, | |
| 3704 a1, Operand(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR))); | |
| 3705 __ lw(a2, MemOperand(a2, StandardFrameConstants::kCallerFPOffset)); | |
| 3706 | |
| 3707 // Check the marker in the calling frame. | |
| 3708 __ bind(&check_frame_marker); | |
| 3709 __ lw(a1, MemOperand(a2, StandardFrameConstants::kMarkerOffset)); | |
| 3710 PrepareForBailoutBeforeSplit(expr, true, if_true, if_false); | |
| 3711 Split(eq, a1, Operand(Smi::FromInt(StackFrame::CONSTRUCT)), | |
| 3712 if_true, if_false, fall_through); | |
| 3713 | |
| 3714 context()->Plug(if_true, if_false); | |
| 3715 } | |
| 3716 | |
| 3717 | |
| 3718 void FullCodeGenerator::EmitObjectEquals(CallRuntime* expr) { | |
| 3719 ZoneList<Expression*>* args = expr->arguments(); | |
| 3720 DCHECK(args->length() == 2); | |
| 3721 | |
| 3722 // Load the two objects into registers and perform the comparison. | |
| 3723 VisitForStackValue(args->at(0)); | |
| 3724 VisitForAccumulatorValue(args->at(1)); | |
| 3725 | |
| 3726 Label materialize_true, materialize_false; | |
| 3727 Label* if_true = NULL; | |
| 3728 Label* if_false = NULL; | |
| 3729 Label* fall_through = NULL; | |
| 3730 context()->PrepareTest(&materialize_true, &materialize_false, | |
| 3731 &if_true, &if_false, &fall_through); | |
| 3732 | |
| 3733 __ pop(a1); | |
| 3734 PrepareForBailoutBeforeSplit(expr, true, if_true, if_false); | |
| 3735 Split(eq, v0, Operand(a1), if_true, if_false, fall_through); | |
| 3736 | |
| 3737 context()->Plug(if_true, if_false); | |
| 3738 } | |
| 3739 | |
| 3740 | |
| 3741 void FullCodeGenerator::EmitArguments(CallRuntime* expr) { | |
| 3742 ZoneList<Expression*>* args = expr->arguments(); | |
| 3743 DCHECK(args->length() == 1); | |
| 3744 | |
| 3745 // ArgumentsAccessStub expects the key in a1 and the formal | |
| 3746 // parameter count in a0. | |
| 3747 VisitForAccumulatorValue(args->at(0)); | |
| 3748 __ mov(a1, v0); | |
| 3749 __ li(a0, Operand(Smi::FromInt(info_->scope()->num_parameters()))); | |
| 3750 ArgumentsAccessStub stub(isolate(), ArgumentsAccessStub::READ_ELEMENT); | |
| 3751 __ CallStub(&stub); | |
| 3752 context()->Plug(v0); | |
| 3753 } | |
| 3754 | |
| 3755 | |
| 3756 void FullCodeGenerator::EmitArgumentsLength(CallRuntime* expr) { | |
| 3757 DCHECK(expr->arguments()->length() == 0); | |
| 3758 Label exit; | |
| 3759 // Get the number of formal parameters. | |
| 3760 __ li(v0, Operand(Smi::FromInt(info_->scope()->num_parameters()))); | |
| 3761 | |
| 3762 // Check if the calling frame is an arguments adaptor frame. | |
| 3763 __ lw(a2, MemOperand(fp, StandardFrameConstants::kCallerFPOffset)); | |
| 3764 __ lw(a3, MemOperand(a2, StandardFrameConstants::kContextOffset)); | |
| 3765 __ Branch(&exit, ne, a3, | |
| 3766 Operand(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR))); | |
| 3767 | |
| 3768 // Arguments adaptor case: Read the arguments length from the | |
| 3769 // adaptor frame. | |
| 3770 __ lw(v0, MemOperand(a2, ArgumentsAdaptorFrameConstants::kLengthOffset)); | |
| 3771 | |
| 3772 __ bind(&exit); | |
| 3773 context()->Plug(v0); | |
| 3774 } | |
| 3775 | |
| 3776 | |
| 3777 void FullCodeGenerator::EmitClassOf(CallRuntime* expr) { | |
| 3778 ZoneList<Expression*>* args = expr->arguments(); | |
| 3779 DCHECK(args->length() == 1); | |
| 3780 Label done, null, function, non_function_constructor; | |
| 3781 | |
| 3782 VisitForAccumulatorValue(args->at(0)); | |
| 3783 | |
| 3784 // If the object is a smi, we return null. | |
| 3785 __ JumpIfSmi(v0, &null); | |
| 3786 | |
| 3787 // Check that the object is a JS object but take special care of JS | |
| 3788 // functions to make sure they have 'Function' as their class. | |
| 3789 // Assume that there are only two callable types, and one of them is at | |
| 3790 // either end of the type range for JS object types. Saves extra comparisons. | |
| 3791 STATIC_ASSERT(NUM_OF_CALLABLE_SPEC_OBJECT_TYPES == 2); | |
| 3792 __ GetObjectType(v0, v0, a1); // Map is now in v0. | |
| 3793 __ Branch(&null, lt, a1, Operand(FIRST_SPEC_OBJECT_TYPE)); | |
| 3794 | |
| 3795 STATIC_ASSERT(FIRST_NONCALLABLE_SPEC_OBJECT_TYPE == | |
| 3796 FIRST_SPEC_OBJECT_TYPE + 1); | |
| 3797 __ Branch(&function, eq, a1, Operand(FIRST_SPEC_OBJECT_TYPE)); | |
| 3798 | |
| 3799 STATIC_ASSERT(LAST_NONCALLABLE_SPEC_OBJECT_TYPE == | |
| 3800 LAST_SPEC_OBJECT_TYPE - 1); | |
| 3801 __ Branch(&function, eq, a1, Operand(LAST_SPEC_OBJECT_TYPE)); | |
| 3802 // Assume that there is no larger type. | |
| 3803 STATIC_ASSERT(LAST_NONCALLABLE_SPEC_OBJECT_TYPE == LAST_TYPE - 1); | |
| 3804 | |
| 3805 // Check if the constructor in the map is a JS function. | |
| 3806 Register instance_type = a2; | |
| 3807 __ GetMapConstructor(v0, v0, a1, instance_type); | |
| 3808 __ Branch(&non_function_constructor, ne, instance_type, | |
| 3809 Operand(JS_FUNCTION_TYPE)); | |
| 3810 | |
| 3811 // v0 now contains the constructor function. Grab the | |
| 3812 // instance class name from there. | |
| 3813 __ lw(v0, FieldMemOperand(v0, JSFunction::kSharedFunctionInfoOffset)); | |
| 3814 __ lw(v0, FieldMemOperand(v0, SharedFunctionInfo::kInstanceClassNameOffset)); | |
| 3815 __ Branch(&done); | |
| 3816 | |
| 3817 // Functions have class 'Function'. | |
| 3818 __ bind(&function); | |
| 3819 __ LoadRoot(v0, Heap::kFunction_stringRootIndex); | |
| 3820 __ jmp(&done); | |
| 3821 | |
| 3822 // Objects with a non-function constructor have class 'Object'. | |
| 3823 __ bind(&non_function_constructor); | |
| 3824 __ LoadRoot(v0, Heap::kObject_stringRootIndex); | |
| 3825 __ jmp(&done); | |
| 3826 | |
| 3827 // Non-JS objects have class null. | |
| 3828 __ bind(&null); | |
| 3829 __ LoadRoot(v0, Heap::kNullValueRootIndex); | |
| 3830 | |
| 3831 // All done. | |
| 3832 __ bind(&done); | |
| 3833 | |
| 3834 context()->Plug(v0); | |
| 3835 } | |
| 3836 | |
| 3837 | |
| 3838 void FullCodeGenerator::EmitValueOf(CallRuntime* expr) { | |
| 3839 ZoneList<Expression*>* args = expr->arguments(); | |
| 3840 DCHECK(args->length() == 1); | |
| 3841 | |
| 3842 VisitForAccumulatorValue(args->at(0)); // Load the object. | |
| 3843 | |
| 3844 Label done; | |
| 3845 // If the object is a smi return the object. | |
| 3846 __ JumpIfSmi(v0, &done); | |
| 3847 // If the object is not a value type, return the object. | |
| 3848 __ GetObjectType(v0, a1, a1); | |
| 3849 __ Branch(&done, ne, a1, Operand(JS_VALUE_TYPE)); | |
| 3850 | |
| 3851 __ lw(v0, FieldMemOperand(v0, JSValue::kValueOffset)); | |
| 3852 | |
| 3853 __ bind(&done); | |
| 3854 context()->Plug(v0); | |
| 3855 } | |
| 3856 | |
| 3857 | |
| 3858 void FullCodeGenerator::EmitIsDate(CallRuntime* expr) { | |
| 3859 ZoneList<Expression*>* args = expr->arguments(); | |
| 3860 DCHECK_EQ(1, args->length()); | |
| 3861 | |
| 3862 VisitForAccumulatorValue(args->at(0)); | |
| 3863 | |
| 3864 Label materialize_true, materialize_false; | |
| 3865 Label* if_true = nullptr; | |
| 3866 Label* if_false = nullptr; | |
| 3867 Label* fall_through = nullptr; | |
| 3868 context()->PrepareTest(&materialize_true, &materialize_false, &if_true, | |
| 3869 &if_false, &fall_through); | |
| 3870 | |
| 3871 __ JumpIfSmi(v0, if_false); | |
| 3872 __ GetObjectType(v0, a1, a1); | |
| 3873 PrepareForBailoutBeforeSplit(expr, true, if_true, if_false); | |
| 3874 Split(eq, a1, Operand(JS_DATE_TYPE), if_true, if_false, fall_through); | |
| 3875 | |
| 3876 context()->Plug(if_true, if_false); | |
| 3877 } | |
| 3878 | |
| 3879 | |
| 3880 void FullCodeGenerator::EmitDateField(CallRuntime* expr) { | |
| 3881 ZoneList<Expression*>* args = expr->arguments(); | |
| 3882 DCHECK(args->length() == 2); | |
| 3883 DCHECK_NOT_NULL(args->at(1)->AsLiteral()); | |
| 3884 Smi* index = Smi::cast(*(args->at(1)->AsLiteral()->value())); | |
| 3885 | |
| 3886 VisitForAccumulatorValue(args->at(0)); // Load the object. | |
| 3887 | |
| 3888 Register object = v0; | |
| 3889 Register result = v0; | |
| 3890 Register scratch0 = t5; | |
| 3891 Register scratch1 = a1; | |
| 3892 | |
| 3893 if (index->value() == 0) { | |
| 3894 __ lw(result, FieldMemOperand(object, JSDate::kValueOffset)); | |
| 3895 } else { | |
| 3896 Label runtime, done; | |
| 3897 if (index->value() < JSDate::kFirstUncachedField) { | |
| 3898 ExternalReference stamp = ExternalReference::date_cache_stamp(isolate()); | |
| 3899 __ li(scratch1, Operand(stamp)); | |
| 3900 __ lw(scratch1, MemOperand(scratch1)); | |
| 3901 __ lw(scratch0, FieldMemOperand(object, JSDate::kCacheStampOffset)); | |
| 3902 __ Branch(&runtime, ne, scratch1, Operand(scratch0)); | |
| 3903 __ lw(result, FieldMemOperand(object, JSDate::kValueOffset + | |
| 3904 kPointerSize * index->value())); | |
| 3905 __ jmp(&done); | |
| 3906 } | |
| 3907 __ bind(&runtime); | |
| 3908 __ PrepareCallCFunction(2, scratch1); | |
| 3909 __ li(a1, Operand(index)); | |
| 3910 __ Move(a0, object); | |
| 3911 __ CallCFunction(ExternalReference::get_date_field_function(isolate()), 2); | |
| 3912 __ bind(&done); | |
| 3913 } | |
| 3914 | |
| 3915 context()->Plug(result); | |
| 3916 } | |
| 3917 | |
| 3918 | |
| 3919 void FullCodeGenerator::EmitOneByteSeqStringSetChar(CallRuntime* expr) { | |
| 3920 ZoneList<Expression*>* args = expr->arguments(); | |
| 3921 DCHECK_EQ(3, args->length()); | |
| 3922 | |
| 3923 Register string = v0; | |
| 3924 Register index = a1; | |
| 3925 Register value = a2; | |
| 3926 | |
| 3927 VisitForStackValue(args->at(0)); // index | |
| 3928 VisitForStackValue(args->at(1)); // value | |
| 3929 VisitForAccumulatorValue(args->at(2)); // string | |
| 3930 __ Pop(index, value); | |
| 3931 | |
| 3932 if (FLAG_debug_code) { | |
| 3933 __ SmiTst(value, at); | |
| 3934 __ Check(eq, kNonSmiValue, at, Operand(zero_reg)); | |
| 3935 __ SmiTst(index, at); | |
| 3936 __ Check(eq, kNonSmiIndex, at, Operand(zero_reg)); | |
| 3937 __ SmiUntag(index, index); | |
| 3938 static const uint32_t one_byte_seq_type = kSeqStringTag | kOneByteStringTag; | |
| 3939 Register scratch = t5; | |
| 3940 __ EmitSeqStringSetCharCheck( | |
| 3941 string, index, value, scratch, one_byte_seq_type); | |
| 3942 __ SmiTag(index, index); | |
| 3943 } | |
| 3944 | |
| 3945 __ SmiUntag(value, value); | |
| 3946 __ Addu(at, | |
| 3947 string, | |
| 3948 Operand(SeqOneByteString::kHeaderSize - kHeapObjectTag)); | |
| 3949 __ SmiUntag(index); | |
| 3950 __ Addu(at, at, index); | |
| 3951 __ sb(value, MemOperand(at)); | |
| 3952 context()->Plug(string); | |
| 3953 } | |
| 3954 | |
| 3955 | |
| 3956 void FullCodeGenerator::EmitTwoByteSeqStringSetChar(CallRuntime* expr) { | |
| 3957 ZoneList<Expression*>* args = expr->arguments(); | |
| 3958 DCHECK_EQ(3, args->length()); | |
| 3959 | |
| 3960 Register string = v0; | |
| 3961 Register index = a1; | |
| 3962 Register value = a2; | |
| 3963 | |
| 3964 VisitForStackValue(args->at(0)); // index | |
| 3965 VisitForStackValue(args->at(1)); // value | |
| 3966 VisitForAccumulatorValue(args->at(2)); // string | |
| 3967 __ Pop(index, value); | |
| 3968 | |
| 3969 if (FLAG_debug_code) { | |
| 3970 __ SmiTst(value, at); | |
| 3971 __ Check(eq, kNonSmiValue, at, Operand(zero_reg)); | |
| 3972 __ SmiTst(index, at); | |
| 3973 __ Check(eq, kNonSmiIndex, at, Operand(zero_reg)); | |
| 3974 __ SmiUntag(index, index); | |
| 3975 static const uint32_t two_byte_seq_type = kSeqStringTag | kTwoByteStringTag; | |
| 3976 Register scratch = t5; | |
| 3977 __ EmitSeqStringSetCharCheck( | |
| 3978 string, index, value, scratch, two_byte_seq_type); | |
| 3979 __ SmiTag(index, index); | |
| 3980 } | |
| 3981 | |
| 3982 __ SmiUntag(value, value); | |
| 3983 __ Addu(at, | |
| 3984 string, | |
| 3985 Operand(SeqTwoByteString::kHeaderSize - kHeapObjectTag)); | |
| 3986 __ Addu(at, at, index); | |
| 3987 STATIC_ASSERT(kSmiTagSize == 1 && kSmiTag == 0); | |
| 3988 __ sh(value, MemOperand(at)); | |
| 3989 context()->Plug(string); | |
| 3990 } | |
| 3991 | |
| 3992 | |
| 3993 void FullCodeGenerator::EmitSetValueOf(CallRuntime* expr) { | |
| 3994 ZoneList<Expression*>* args = expr->arguments(); | |
| 3995 DCHECK(args->length() == 2); | |
| 3996 | |
| 3997 VisitForStackValue(args->at(0)); // Load the object. | |
| 3998 VisitForAccumulatorValue(args->at(1)); // Load the value. | |
| 3999 __ pop(a1); // v0 = value. a1 = object. | |
| 4000 | |
| 4001 Label done; | |
| 4002 // If the object is a smi, return the value. | |
| 4003 __ JumpIfSmi(a1, &done); | |
| 4004 | |
| 4005 // If the object is not a value type, return the value. | |
| 4006 __ GetObjectType(a1, a2, a2); | |
| 4007 __ Branch(&done, ne, a2, Operand(JS_VALUE_TYPE)); | |
| 4008 | |
| 4009 // Store the value. | |
| 4010 __ sw(v0, FieldMemOperand(a1, JSValue::kValueOffset)); | |
| 4011 // Update the write barrier. Save the value as it will be | |
| 4012 // overwritten by the write barrier code and is needed afterward. | |
| 4013 __ mov(a2, v0); | |
| 4014 __ RecordWriteField( | |
| 4015 a1, JSValue::kValueOffset, a2, a3, kRAHasBeenSaved, kDontSaveFPRegs); | |
| 4016 | |
| 4017 __ bind(&done); | |
| 4018 context()->Plug(v0); | |
| 4019 } | |
| 4020 | |
| 4021 | |
| 4022 void FullCodeGenerator::EmitNumberToString(CallRuntime* expr) { | |
| 4023 ZoneList<Expression*>* args = expr->arguments(); | |
| 4024 DCHECK_EQ(args->length(), 1); | |
| 4025 | |
| 4026 // Load the argument into a0 and call the stub. | |
| 4027 VisitForAccumulatorValue(args->at(0)); | |
| 4028 __ mov(a0, result_register()); | |
| 4029 | |
| 4030 NumberToStringStub stub(isolate()); | |
| 4031 __ CallStub(&stub); | |
| 4032 context()->Plug(v0); | |
| 4033 } | |
| 4034 | |
| 4035 | |
| 4036 void FullCodeGenerator::EmitStringCharFromCode(CallRuntime* expr) { | |
| 4037 ZoneList<Expression*>* args = expr->arguments(); | |
| 4038 DCHECK(args->length() == 1); | |
| 4039 | |
| 4040 VisitForAccumulatorValue(args->at(0)); | |
| 4041 | |
| 4042 Label done; | |
| 4043 StringCharFromCodeGenerator generator(v0, a1); | |
| 4044 generator.GenerateFast(masm_); | |
| 4045 __ jmp(&done); | |
| 4046 | |
| 4047 NopRuntimeCallHelper call_helper; | |
| 4048 generator.GenerateSlow(masm_, call_helper); | |
| 4049 | |
| 4050 __ bind(&done); | |
| 4051 context()->Plug(a1); | |
| 4052 } | |
| 4053 | |
| 4054 | |
| 4055 void FullCodeGenerator::EmitStringCharCodeAt(CallRuntime* expr) { | |
| 4056 ZoneList<Expression*>* args = expr->arguments(); | |
| 4057 DCHECK(args->length() == 2); | |
| 4058 | |
| 4059 VisitForStackValue(args->at(0)); | |
| 4060 VisitForAccumulatorValue(args->at(1)); | |
| 4061 __ mov(a0, result_register()); | |
| 4062 | |
| 4063 Register object = a1; | |
| 4064 Register index = a0; | |
| 4065 Register result = v0; | |
| 4066 | |
| 4067 __ pop(object); | |
| 4068 | |
| 4069 Label need_conversion; | |
| 4070 Label index_out_of_range; | |
| 4071 Label done; | |
| 4072 StringCharCodeAtGenerator generator(object, | |
| 4073 index, | |
| 4074 result, | |
| 4075 &need_conversion, | |
| 4076 &need_conversion, | |
| 4077 &index_out_of_range, | |
| 4078 STRING_INDEX_IS_NUMBER); | |
| 4079 generator.GenerateFast(masm_); | |
| 4080 __ jmp(&done); | |
| 4081 | |
| 4082 __ bind(&index_out_of_range); | |
| 4083 // When the index is out of range, the spec requires us to return | |
| 4084 // NaN. | |
| 4085 __ LoadRoot(result, Heap::kNanValueRootIndex); | |
| 4086 __ jmp(&done); | |
| 4087 | |
| 4088 __ bind(&need_conversion); | |
| 4089 // Load the undefined value into the result register, which will | |
| 4090 // trigger conversion. | |
| 4091 __ LoadRoot(result, Heap::kUndefinedValueRootIndex); | |
| 4092 __ jmp(&done); | |
| 4093 | |
| 4094 NopRuntimeCallHelper call_helper; | |
| 4095 generator.GenerateSlow(masm_, NOT_PART_OF_IC_HANDLER, call_helper); | |
| 4096 | |
| 4097 __ bind(&done); | |
| 4098 context()->Plug(result); | |
| 4099 } | |
| 4100 | |
| 4101 | |
| 4102 void FullCodeGenerator::EmitStringCharAt(CallRuntime* expr) { | |
| 4103 ZoneList<Expression*>* args = expr->arguments(); | |
| 4104 DCHECK(args->length() == 2); | |
| 4105 | |
| 4106 VisitForStackValue(args->at(0)); | |
| 4107 VisitForAccumulatorValue(args->at(1)); | |
| 4108 __ mov(a0, result_register()); | |
| 4109 | |
| 4110 Register object = a1; | |
| 4111 Register index = a0; | |
| 4112 Register scratch = a3; | |
| 4113 Register result = v0; | |
| 4114 | |
| 4115 __ pop(object); | |
| 4116 | |
| 4117 Label need_conversion; | |
| 4118 Label index_out_of_range; | |
| 4119 Label done; | |
| 4120 StringCharAtGenerator generator(object, | |
| 4121 index, | |
| 4122 scratch, | |
| 4123 result, | |
| 4124 &need_conversion, | |
| 4125 &need_conversion, | |
| 4126 &index_out_of_range, | |
| 4127 STRING_INDEX_IS_NUMBER); | |
| 4128 generator.GenerateFast(masm_); | |
| 4129 __ jmp(&done); | |
| 4130 | |
| 4131 __ bind(&index_out_of_range); | |
| 4132 // When the index is out of range, the spec requires us to return | |
| 4133 // the empty string. | |
| 4134 __ LoadRoot(result, Heap::kempty_stringRootIndex); | |
| 4135 __ jmp(&done); | |
| 4136 | |
| 4137 __ bind(&need_conversion); | |
| 4138 // Move smi zero into the result register, which will trigger | |
| 4139 // conversion. | |
| 4140 __ li(result, Operand(Smi::FromInt(0))); | |
| 4141 __ jmp(&done); | |
| 4142 | |
| 4143 NopRuntimeCallHelper call_helper; | |
| 4144 generator.GenerateSlow(masm_, NOT_PART_OF_IC_HANDLER, call_helper); | |
| 4145 | |
| 4146 __ bind(&done); | |
| 4147 context()->Plug(result); | |
| 4148 } | |
| 4149 | |
| 4150 | |
| 4151 void FullCodeGenerator::EmitStringAdd(CallRuntime* expr) { | |
| 4152 ZoneList<Expression*>* args = expr->arguments(); | |
| 4153 DCHECK_EQ(2, args->length()); | |
| 4154 VisitForStackValue(args->at(0)); | |
| 4155 VisitForAccumulatorValue(args->at(1)); | |
| 4156 | |
| 4157 __ pop(a1); | |
| 4158 __ mov(a0, result_register()); // StringAddStub requires args in a0, a1. | |
| 4159 StringAddStub stub(isolate(), STRING_ADD_CHECK_BOTH, NOT_TENURED); | |
| 4160 __ CallStub(&stub); | |
| 4161 context()->Plug(v0); | |
| 4162 } | |
| 4163 | |
| 4164 | |
| 4165 void FullCodeGenerator::EmitCallFunction(CallRuntime* expr) { | |
| 4166 ZoneList<Expression*>* args = expr->arguments(); | |
| 4167 DCHECK(args->length() >= 2); | |
| 4168 | |
| 4169 int arg_count = args->length() - 2; // 2 ~ receiver and function. | |
| 4170 for (int i = 0; i < arg_count + 1; i++) { | |
| 4171 VisitForStackValue(args->at(i)); | |
| 4172 } | |
| 4173 VisitForAccumulatorValue(args->last()); // Function. | |
| 4174 | |
| 4175 Label runtime, done; | |
| 4176 // Check for non-function argument (including proxy). | |
| 4177 __ JumpIfSmi(v0, &runtime); | |
| 4178 __ GetObjectType(v0, a1, a1); | |
| 4179 __ Branch(&runtime, ne, a1, Operand(JS_FUNCTION_TYPE)); | |
| 4180 | |
| 4181 // InvokeFunction requires the function in a1. Move it in there. | |
| 4182 __ mov(a1, result_register()); | |
| 4183 ParameterCount count(arg_count); | |
| 4184 __ InvokeFunction(a1, count, CALL_FUNCTION, NullCallWrapper()); | |
| 4185 __ lw(cp, MemOperand(fp, StandardFrameConstants::kContextOffset)); | |
| 4186 __ jmp(&done); | |
| 4187 | |
| 4188 __ bind(&runtime); | |
| 4189 __ push(v0); | |
| 4190 __ CallRuntime(Runtime::kCall, args->length()); | |
| 4191 __ bind(&done); | |
| 4192 | |
| 4193 context()->Plug(v0); | |
| 4194 } | |
| 4195 | |
| 4196 | |
| 4197 void FullCodeGenerator::EmitDefaultConstructorCallSuper(CallRuntime* expr) { | |
| 4198 ZoneList<Expression*>* args = expr->arguments(); | |
| 4199 DCHECK(args->length() == 2); | |
| 4200 | |
| 4201 // new.target | |
| 4202 VisitForStackValue(args->at(0)); | |
| 4203 | |
| 4204 // .this_function | |
| 4205 VisitForStackValue(args->at(1)); | |
| 4206 __ CallRuntime(Runtime::kGetPrototype, 1); | |
| 4207 __ Push(result_register()); | |
| 4208 | |
| 4209 // Load original constructor into t0. | |
| 4210 __ lw(t0, MemOperand(sp, 1 * kPointerSize)); | |
| 4211 | |
| 4212 // Check if the calling frame is an arguments adaptor frame. | |
| 4213 Label adaptor_frame, args_set_up, runtime; | |
| 4214 __ lw(a2, MemOperand(fp, StandardFrameConstants::kCallerFPOffset)); | |
| 4215 __ lw(a3, MemOperand(a2, StandardFrameConstants::kContextOffset)); | |
| 4216 __ Branch(&adaptor_frame, eq, a3, | |
| 4217 Operand(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR))); | |
| 4218 // default constructor has no arguments, so no adaptor frame means no args. | |
| 4219 __ mov(a0, zero_reg); | |
| 4220 __ Branch(&args_set_up); | |
| 4221 | |
| 4222 // Copy arguments from adaptor frame. | |
| 4223 { | |
| 4224 __ bind(&adaptor_frame); | |
| 4225 __ lw(a1, MemOperand(a2, ArgumentsAdaptorFrameConstants::kLengthOffset)); | |
| 4226 __ SmiUntag(a1, a1); | |
| 4227 | |
| 4228 __ mov(a0, a1); | |
| 4229 | |
| 4230 // Get arguments pointer in a2. | |
| 4231 __ sll(at, a1, kPointerSizeLog2); | |
| 4232 __ addu(a2, a2, at); | |
| 4233 __ Addu(a2, a2, Operand(StandardFrameConstants::kCallerSPOffset)); | |
| 4234 Label loop; | |
| 4235 __ bind(&loop); | |
| 4236 // Pre-decrement a2 with kPointerSize on each iteration. | |
| 4237 // Pre-decrement in order to skip receiver. | |
| 4238 __ Addu(a2, a2, Operand(-kPointerSize)); | |
| 4239 __ lw(a3, MemOperand(a2)); | |
| 4240 __ Push(a3); | |
| 4241 __ Addu(a1, a1, Operand(-1)); | |
| 4242 __ Branch(&loop, ne, a1, Operand(zero_reg)); | |
| 4243 } | |
| 4244 | |
| 4245 __ bind(&args_set_up); | |
| 4246 __ sll(at, a0, kPointerSizeLog2); | |
| 4247 __ Addu(at, at, Operand(sp)); | |
| 4248 __ lw(a1, MemOperand(at, 0)); | |
| 4249 __ LoadRoot(a2, Heap::kUndefinedValueRootIndex); | |
| 4250 | |
| 4251 CallConstructStub stub(isolate(), SUPER_CONSTRUCTOR_CALL); | |
| 4252 __ Call(stub.GetCode(), RelocInfo::CONSTRUCT_CALL); | |
| 4253 | |
| 4254 __ Drop(1); | |
| 4255 | |
| 4256 context()->Plug(result_register()); | |
| 4257 } | |
| 4258 | |
| 4259 | |
| 4260 void FullCodeGenerator::EmitRegExpConstructResult(CallRuntime* expr) { | |
| 4261 RegExpConstructResultStub stub(isolate()); | |
| 4262 ZoneList<Expression*>* args = expr->arguments(); | |
| 4263 DCHECK(args->length() == 3); | |
| 4264 VisitForStackValue(args->at(0)); | |
| 4265 VisitForStackValue(args->at(1)); | |
| 4266 VisitForAccumulatorValue(args->at(2)); | |
| 4267 __ mov(a0, result_register()); | |
| 4268 __ pop(a1); | |
| 4269 __ pop(a2); | |
| 4270 __ CallStub(&stub); | |
| 4271 context()->Plug(v0); | |
| 4272 } | |
| 4273 | |
| 4274 | |
| 4275 void FullCodeGenerator::EmitGetFromCache(CallRuntime* expr) { | |
| 4276 ZoneList<Expression*>* args = expr->arguments(); | |
| 4277 DCHECK_EQ(2, args->length()); | |
| 4278 | |
| 4279 DCHECK_NOT_NULL(args->at(0)->AsLiteral()); | |
| 4280 int cache_id = Smi::cast(*(args->at(0)->AsLiteral()->value()))->value(); | |
| 4281 | |
| 4282 Handle<FixedArray> jsfunction_result_caches( | |
| 4283 isolate()->native_context()->jsfunction_result_caches()); | |
| 4284 if (jsfunction_result_caches->length() <= cache_id) { | |
| 4285 __ Abort(kAttemptToUseUndefinedCache); | |
| 4286 __ LoadRoot(v0, Heap::kUndefinedValueRootIndex); | |
| 4287 context()->Plug(v0); | |
| 4288 return; | |
| 4289 } | |
| 4290 | |
| 4291 VisitForAccumulatorValue(args->at(1)); | |
| 4292 | |
| 4293 Register key = v0; | |
| 4294 Register cache = a1; | |
| 4295 __ lw(cache, ContextOperand(cp, Context::GLOBAL_OBJECT_INDEX)); | |
| 4296 __ lw(cache, FieldMemOperand(cache, GlobalObject::kNativeContextOffset)); | |
| 4297 __ lw(cache, | |
| 4298 ContextOperand( | |
| 4299 cache, Context::JSFUNCTION_RESULT_CACHES_INDEX)); | |
| 4300 __ lw(cache, | |
| 4301 FieldMemOperand(cache, FixedArray::OffsetOfElementAt(cache_id))); | |
| 4302 | |
| 4303 | |
| 4304 Label done, not_found; | |
| 4305 STATIC_ASSERT(kSmiTag == 0 && kSmiTagSize == 1); | |
| 4306 __ lw(a2, FieldMemOperand(cache, JSFunctionResultCache::kFingerOffset)); | |
| 4307 // a2 now holds finger offset as a smi. | |
| 4308 __ Addu(a3, cache, Operand(FixedArray::kHeaderSize - kHeapObjectTag)); | |
| 4309 // a3 now points to the start of fixed array elements. | |
| 4310 __ sll(at, a2, kPointerSizeLog2 - kSmiTagSize); | |
| 4311 __ addu(a3, a3, at); | |
| 4312 // a3 now points to key of indexed element of cache. | |
| 4313 __ lw(a2, MemOperand(a3)); | |
| 4314 __ Branch(¬_found, ne, key, Operand(a2)); | |
| 4315 | |
| 4316 __ lw(v0, MemOperand(a3, kPointerSize)); | |
| 4317 __ Branch(&done); | |
| 4318 | |
| 4319 __ bind(¬_found); | |
| 4320 // Call runtime to perform the lookup. | |
| 4321 __ Push(cache, key); | |
| 4322 __ CallRuntime(Runtime::kGetFromCacheRT, 2); | |
| 4323 | |
| 4324 __ bind(&done); | |
| 4325 context()->Plug(v0); | |
| 4326 } | |
| 4327 | |
| 4328 | |
| 4329 void FullCodeGenerator::EmitHasCachedArrayIndex(CallRuntime* expr) { | |
| 4330 ZoneList<Expression*>* args = expr->arguments(); | |
| 4331 VisitForAccumulatorValue(args->at(0)); | |
| 4332 | |
| 4333 Label materialize_true, materialize_false; | |
| 4334 Label* if_true = NULL; | |
| 4335 Label* if_false = NULL; | |
| 4336 Label* fall_through = NULL; | |
| 4337 context()->PrepareTest(&materialize_true, &materialize_false, | |
| 4338 &if_true, &if_false, &fall_through); | |
| 4339 | |
| 4340 __ lw(a0, FieldMemOperand(v0, String::kHashFieldOffset)); | |
| 4341 __ And(a0, a0, Operand(String::kContainsCachedArrayIndexMask)); | |
| 4342 | |
| 4343 PrepareForBailoutBeforeSplit(expr, true, if_true, if_false); | |
| 4344 Split(eq, a0, Operand(zero_reg), if_true, if_false, fall_through); | |
| 4345 | |
| 4346 context()->Plug(if_true, if_false); | |
| 4347 } | |
| 4348 | |
| 4349 | |
| 4350 void FullCodeGenerator::EmitGetCachedArrayIndex(CallRuntime* expr) { | |
| 4351 ZoneList<Expression*>* args = expr->arguments(); | |
| 4352 DCHECK(args->length() == 1); | |
| 4353 VisitForAccumulatorValue(args->at(0)); | |
| 4354 | |
| 4355 __ AssertString(v0); | |
| 4356 | |
| 4357 __ lw(v0, FieldMemOperand(v0, String::kHashFieldOffset)); | |
| 4358 __ IndexFromHash(v0, v0); | |
| 4359 | |
| 4360 context()->Plug(v0); | |
| 4361 } | |
| 4362 | |
| 4363 | |
| 4364 void FullCodeGenerator::EmitFastOneByteArrayJoin(CallRuntime* expr) { | |
| 4365 Label bailout, done, one_char_separator, long_separator, | |
| 4366 non_trivial_array, not_size_one_array, loop, | |
| 4367 empty_separator_loop, one_char_separator_loop, | |
| 4368 one_char_separator_loop_entry, long_separator_loop; | |
| 4369 ZoneList<Expression*>* args = expr->arguments(); | |
| 4370 DCHECK(args->length() == 2); | |
| 4371 VisitForStackValue(args->at(1)); | |
| 4372 VisitForAccumulatorValue(args->at(0)); | |
| 4373 | |
| 4374 // All aliases of the same register have disjoint lifetimes. | |
| 4375 Register array = v0; | |
| 4376 Register elements = no_reg; // Will be v0. | |
| 4377 Register result = no_reg; // Will be v0. | |
| 4378 Register separator = a1; | |
| 4379 Register array_length = a2; | |
| 4380 Register result_pos = no_reg; // Will be a2. | |
| 4381 Register string_length = a3; | |
| 4382 Register string = t0; | |
| 4383 Register element = t1; | |
| 4384 Register elements_end = t2; | |
| 4385 Register scratch1 = t3; | |
| 4386 Register scratch2 = t5; | |
| 4387 Register scratch3 = t4; | |
| 4388 | |
| 4389 // Separator operand is on the stack. | |
| 4390 __ pop(separator); | |
| 4391 | |
| 4392 // Check that the array is a JSArray. | |
| 4393 __ JumpIfSmi(array, &bailout); | |
| 4394 __ GetObjectType(array, scratch1, scratch2); | |
| 4395 __ Branch(&bailout, ne, scratch2, Operand(JS_ARRAY_TYPE)); | |
| 4396 | |
| 4397 // Check that the array has fast elements. | |
| 4398 __ CheckFastElements(scratch1, scratch2, &bailout); | |
| 4399 | |
| 4400 // If the array has length zero, return the empty string. | |
| 4401 __ lw(array_length, FieldMemOperand(array, JSArray::kLengthOffset)); | |
| 4402 __ SmiUntag(array_length); | |
| 4403 __ Branch(&non_trivial_array, ne, array_length, Operand(zero_reg)); | |
| 4404 __ LoadRoot(v0, Heap::kempty_stringRootIndex); | |
| 4405 __ Branch(&done); | |
| 4406 | |
| 4407 __ bind(&non_trivial_array); | |
| 4408 | |
| 4409 // Get the FixedArray containing array's elements. | |
| 4410 elements = array; | |
| 4411 __ lw(elements, FieldMemOperand(array, JSArray::kElementsOffset)); | |
| 4412 array = no_reg; // End of array's live range. | |
| 4413 | |
| 4414 // Check that all array elements are sequential one-byte strings, and | |
| 4415 // accumulate the sum of their lengths, as a smi-encoded value. | |
| 4416 __ mov(string_length, zero_reg); | |
| 4417 __ Addu(element, | |
| 4418 elements, Operand(FixedArray::kHeaderSize - kHeapObjectTag)); | |
| 4419 __ sll(elements_end, array_length, kPointerSizeLog2); | |
| 4420 __ Addu(elements_end, element, elements_end); | |
| 4421 // Loop condition: while (element < elements_end). | |
| 4422 // Live values in registers: | |
| 4423 // elements: Fixed array of strings. | |
| 4424 // array_length: Length of the fixed array of strings (not smi) | |
| 4425 // separator: Separator string | |
| 4426 // string_length: Accumulated sum of string lengths (smi). | |
| 4427 // element: Current array element. | |
| 4428 // elements_end: Array end. | |
| 4429 if (generate_debug_code_) { | |
| 4430 __ Assert(gt, kNoEmptyArraysHereInEmitFastOneByteArrayJoin, array_length, | |
| 4431 Operand(zero_reg)); | |
| 4432 } | |
| 4433 __ bind(&loop); | |
| 4434 __ lw(string, MemOperand(element)); | |
| 4435 __ Addu(element, element, kPointerSize); | |
| 4436 __ JumpIfSmi(string, &bailout); | |
| 4437 __ lw(scratch1, FieldMemOperand(string, HeapObject::kMapOffset)); | |
| 4438 __ lbu(scratch1, FieldMemOperand(scratch1, Map::kInstanceTypeOffset)); | |
| 4439 __ JumpIfInstanceTypeIsNotSequentialOneByte(scratch1, scratch2, &bailout); | |
| 4440 __ lw(scratch1, FieldMemOperand(string, SeqOneByteString::kLengthOffset)); | |
| 4441 __ AdduAndCheckForOverflow(string_length, string_length, scratch1, scratch3); | |
| 4442 __ BranchOnOverflow(&bailout, scratch3); | |
| 4443 __ Branch(&loop, lt, element, Operand(elements_end)); | |
| 4444 | |
| 4445 // If array_length is 1, return elements[0], a string. | |
| 4446 __ Branch(¬_size_one_array, ne, array_length, Operand(1)); | |
| 4447 __ lw(v0, FieldMemOperand(elements, FixedArray::kHeaderSize)); | |
| 4448 __ Branch(&done); | |
| 4449 | |
| 4450 __ bind(¬_size_one_array); | |
| 4451 | |
| 4452 // Live values in registers: | |
| 4453 // separator: Separator string | |
| 4454 // array_length: Length of the array. | |
| 4455 // string_length: Sum of string lengths (smi). | |
| 4456 // elements: FixedArray of strings. | |
| 4457 | |
| 4458 // Check that the separator is a flat one-byte string. | |
| 4459 __ JumpIfSmi(separator, &bailout); | |
| 4460 __ lw(scratch1, FieldMemOperand(separator, HeapObject::kMapOffset)); | |
| 4461 __ lbu(scratch1, FieldMemOperand(scratch1, Map::kInstanceTypeOffset)); | |
| 4462 __ JumpIfInstanceTypeIsNotSequentialOneByte(scratch1, scratch2, &bailout); | |
| 4463 | |
| 4464 // Add (separator length times array_length) - separator length to the | |
| 4465 // string_length to get the length of the result string. array_length is not | |
| 4466 // smi but the other values are, so the result is a smi. | |
| 4467 __ lw(scratch1, FieldMemOperand(separator, SeqOneByteString::kLengthOffset)); | |
| 4468 __ Subu(string_length, string_length, Operand(scratch1)); | |
| 4469 __ Mul(scratch3, scratch2, array_length, scratch1); | |
| 4470 // Check for smi overflow. No overflow if higher 33 bits of 64-bit result are | |
| 4471 // zero. | |
| 4472 __ Branch(&bailout, ne, scratch3, Operand(zero_reg)); | |
| 4473 __ And(scratch3, scratch2, Operand(0x80000000)); | |
| 4474 __ Branch(&bailout, ne, scratch3, Operand(zero_reg)); | |
| 4475 __ AdduAndCheckForOverflow(string_length, string_length, scratch2, scratch3); | |
| 4476 __ BranchOnOverflow(&bailout, scratch3); | |
| 4477 __ SmiUntag(string_length); | |
| 4478 | |
| 4479 // Get first element in the array to free up the elements register to be used | |
| 4480 // for the result. | |
| 4481 __ Addu(element, | |
| 4482 elements, Operand(FixedArray::kHeaderSize - kHeapObjectTag)); | |
| 4483 result = elements; // End of live range for elements. | |
| 4484 elements = no_reg; | |
| 4485 // Live values in registers: | |
| 4486 // element: First array element | |
| 4487 // separator: Separator string | |
| 4488 // string_length: Length of result string (not smi) | |
| 4489 // array_length: Length of the array. | |
| 4490 __ AllocateOneByteString(result, string_length, scratch1, scratch2, | |
| 4491 elements_end, &bailout); | |
| 4492 // Prepare for looping. Set up elements_end to end of the array. Set | |
| 4493 // result_pos to the position of the result where to write the first | |
| 4494 // character. | |
| 4495 __ sll(elements_end, array_length, kPointerSizeLog2); | |
| 4496 __ Addu(elements_end, element, elements_end); | |
| 4497 result_pos = array_length; // End of live range for array_length. | |
| 4498 array_length = no_reg; | |
| 4499 __ Addu(result_pos, | |
| 4500 result, | |
| 4501 Operand(SeqOneByteString::kHeaderSize - kHeapObjectTag)); | |
| 4502 | |
| 4503 // Check the length of the separator. | |
| 4504 __ lw(scratch1, FieldMemOperand(separator, SeqOneByteString::kLengthOffset)); | |
| 4505 __ li(at, Operand(Smi::FromInt(1))); | |
| 4506 __ Branch(&one_char_separator, eq, scratch1, Operand(at)); | |
| 4507 __ Branch(&long_separator, gt, scratch1, Operand(at)); | |
| 4508 | |
| 4509 // Empty separator case. | |
| 4510 __ bind(&empty_separator_loop); | |
| 4511 // Live values in registers: | |
| 4512 // result_pos: the position to which we are currently copying characters. | |
| 4513 // element: Current array element. | |
| 4514 // elements_end: Array end. | |
| 4515 | |
| 4516 // Copy next array element to the result. | |
| 4517 __ lw(string, MemOperand(element)); | |
| 4518 __ Addu(element, element, kPointerSize); | |
| 4519 __ lw(string_length, FieldMemOperand(string, String::kLengthOffset)); | |
| 4520 __ SmiUntag(string_length); | |
| 4521 __ Addu(string, string, SeqOneByteString::kHeaderSize - kHeapObjectTag); | |
| 4522 __ CopyBytes(string, result_pos, string_length, scratch1); | |
| 4523 // End while (element < elements_end). | |
| 4524 __ Branch(&empty_separator_loop, lt, element, Operand(elements_end)); | |
| 4525 DCHECK(result.is(v0)); | |
| 4526 __ Branch(&done); | |
| 4527 | |
| 4528 // One-character separator case. | |
| 4529 __ bind(&one_char_separator); | |
| 4530 // Replace separator with its one-byte character value. | |
| 4531 __ lbu(separator, FieldMemOperand(separator, SeqOneByteString::kHeaderSize)); | |
| 4532 // Jump into the loop after the code that copies the separator, so the first | |
| 4533 // element is not preceded by a separator. | |
| 4534 __ jmp(&one_char_separator_loop_entry); | |
| 4535 | |
| 4536 __ bind(&one_char_separator_loop); | |
| 4537 // Live values in registers: | |
| 4538 // result_pos: the position to which we are currently copying characters. | |
| 4539 // element: Current array element. | |
| 4540 // elements_end: Array end. | |
| 4541 // separator: Single separator one-byte char (in lower byte). | |
| 4542 | |
| 4543 // Copy the separator character to the result. | |
| 4544 __ sb(separator, MemOperand(result_pos)); | |
| 4545 __ Addu(result_pos, result_pos, 1); | |
| 4546 | |
| 4547 // Copy next array element to the result. | |
| 4548 __ bind(&one_char_separator_loop_entry); | |
| 4549 __ lw(string, MemOperand(element)); | |
| 4550 __ Addu(element, element, kPointerSize); | |
| 4551 __ lw(string_length, FieldMemOperand(string, String::kLengthOffset)); | |
| 4552 __ SmiUntag(string_length); | |
| 4553 __ Addu(string, string, SeqOneByteString::kHeaderSize - kHeapObjectTag); | |
| 4554 __ CopyBytes(string, result_pos, string_length, scratch1); | |
| 4555 // End while (element < elements_end). | |
| 4556 __ Branch(&one_char_separator_loop, lt, element, Operand(elements_end)); | |
| 4557 DCHECK(result.is(v0)); | |
| 4558 __ Branch(&done); | |
| 4559 | |
| 4560 // Long separator case (separator is more than one character). Entry is at the | |
| 4561 // label long_separator below. | |
| 4562 __ bind(&long_separator_loop); | |
| 4563 // Live values in registers: | |
| 4564 // result_pos: the position to which we are currently copying characters. | |
| 4565 // element: Current array element. | |
| 4566 // elements_end: Array end. | |
| 4567 // separator: Separator string. | |
| 4568 | |
| 4569 // Copy the separator to the result. | |
| 4570 __ lw(string_length, FieldMemOperand(separator, String::kLengthOffset)); | |
| 4571 __ SmiUntag(string_length); | |
| 4572 __ Addu(string, | |
| 4573 separator, | |
| 4574 Operand(SeqOneByteString::kHeaderSize - kHeapObjectTag)); | |
| 4575 __ CopyBytes(string, result_pos, string_length, scratch1); | |
| 4576 | |
| 4577 __ bind(&long_separator); | |
| 4578 __ lw(string, MemOperand(element)); | |
| 4579 __ Addu(element, element, kPointerSize); | |
| 4580 __ lw(string_length, FieldMemOperand(string, String::kLengthOffset)); | |
| 4581 __ SmiUntag(string_length); | |
| 4582 __ Addu(string, string, SeqOneByteString::kHeaderSize - kHeapObjectTag); | |
| 4583 __ CopyBytes(string, result_pos, string_length, scratch1); | |
| 4584 // End while (element < elements_end). | |
| 4585 __ Branch(&long_separator_loop, lt, element, Operand(elements_end)); | |
| 4586 DCHECK(result.is(v0)); | |
| 4587 __ Branch(&done); | |
| 4588 | |
| 4589 __ bind(&bailout); | |
| 4590 __ LoadRoot(v0, Heap::kUndefinedValueRootIndex); | |
| 4591 __ bind(&done); | |
| 4592 context()->Plug(v0); | |
| 4593 } | |
| 4594 | |
| 4595 | |
| 4596 void FullCodeGenerator::EmitDebugIsActive(CallRuntime* expr) { | |
| 4597 DCHECK(expr->arguments()->length() == 0); | |
| 4598 ExternalReference debug_is_active = | |
| 4599 ExternalReference::debug_is_active_address(isolate()); | |
| 4600 __ li(at, Operand(debug_is_active)); | |
| 4601 __ lb(v0, MemOperand(at)); | |
| 4602 __ SmiTag(v0); | |
| 4603 context()->Plug(v0); | |
| 4604 } | |
| 4605 | |
| 4606 | |
| 4607 void FullCodeGenerator::EmitLoadJSRuntimeFunction(CallRuntime* expr) { | |
| 4608 // Push the builtins object as the receiver. | |
| 4609 Register receiver = LoadDescriptor::ReceiverRegister(); | |
| 4610 __ lw(receiver, GlobalObjectOperand()); | |
| 4611 __ lw(receiver, FieldMemOperand(receiver, GlobalObject::kBuiltinsOffset)); | |
| 4612 __ push(receiver); | |
| 4613 | |
| 4614 // Load the function from the receiver. | |
| 4615 __ li(LoadDescriptor::NameRegister(), Operand(expr->name())); | |
| 4616 __ li(LoadDescriptor::SlotRegister(), | |
| 4617 Operand(SmiFromSlot(expr->CallRuntimeFeedbackSlot()))); | |
| 4618 CallLoadIC(NOT_INSIDE_TYPEOF); | |
| 4619 } | |
| 4620 | |
| 4621 | |
| 4622 void FullCodeGenerator::EmitCallJSRuntimeFunction(CallRuntime* expr) { | |
| 4623 ZoneList<Expression*>* args = expr->arguments(); | |
| 4624 int arg_count = args->length(); | |
| 4625 | |
| 4626 SetCallPosition(expr, arg_count); | |
| 4627 CallFunctionStub stub(isolate(), arg_count, NO_CALL_FUNCTION_FLAGS); | |
| 4628 __ lw(a1, MemOperand(sp, (arg_count + 1) * kPointerSize)); | |
| 4629 __ CallStub(&stub); | |
| 4630 } | |
| 4631 | |
| 4632 | |
| 4633 void FullCodeGenerator::VisitCallRuntime(CallRuntime* expr) { | |
| 4634 ZoneList<Expression*>* args = expr->arguments(); | |
| 4635 int arg_count = args->length(); | |
| 4636 | |
| 4637 if (expr->is_jsruntime()) { | |
| 4638 Comment cmnt(masm_, "[ CallRuntime"); | |
| 4639 EmitLoadJSRuntimeFunction(expr); | |
| 4640 | |
| 4641 // Push the target function under the receiver. | |
| 4642 __ lw(at, MemOperand(sp, 0)); | |
| 4643 __ push(at); | |
| 4644 __ sw(v0, MemOperand(sp, kPointerSize)); | |
| 4645 | |
| 4646 // Push the arguments ("left-to-right"). | |
| 4647 for (int i = 0; i < arg_count; i++) { | |
| 4648 VisitForStackValue(args->at(i)); | |
| 4649 } | |
| 4650 | |
| 4651 PrepareForBailoutForId(expr->CallId(), NO_REGISTERS); | |
| 4652 EmitCallJSRuntimeFunction(expr); | |
| 4653 | |
| 4654 // Restore context register. | |
| 4655 __ lw(cp, MemOperand(fp, StandardFrameConstants::kContextOffset)); | |
| 4656 | |
| 4657 context()->DropAndPlug(1, v0); | |
| 4658 | |
| 4659 } else { | |
| 4660 const Runtime::Function* function = expr->function(); | |
| 4661 switch (function->function_id) { | |
| 4662 #define CALL_INTRINSIC_GENERATOR(Name) \ | |
| 4663 case Runtime::kInline##Name: { \ | |
| 4664 Comment cmnt(masm_, "[ Inline" #Name); \ | |
| 4665 return Emit##Name(expr); \ | |
| 4666 } | |
| 4667 FOR_EACH_FULL_CODE_INTRINSIC(CALL_INTRINSIC_GENERATOR) | |
| 4668 #undef CALL_INTRINSIC_GENERATOR | |
| 4669 default: { | |
| 4670 Comment cmnt(masm_, "[ CallRuntime for unhandled intrinsic"); | |
| 4671 // Push the arguments ("left-to-right"). | |
| 4672 for (int i = 0; i < arg_count; i++) { | |
| 4673 VisitForStackValue(args->at(i)); | |
| 4674 } | |
| 4675 | |
| 4676 // Call the C runtime function. | |
| 4677 PrepareForBailoutForId(expr->CallId(), NO_REGISTERS); | |
| 4678 __ CallRuntime(expr->function(), arg_count); | |
| 4679 context()->Plug(v0); | |
| 4680 } | |
| 4681 } | |
| 4682 } | |
| 4683 } | |
| 4684 | |
| 4685 | |
| 4686 void FullCodeGenerator::VisitUnaryOperation(UnaryOperation* expr) { | |
| 4687 switch (expr->op()) { | |
| 4688 case Token::DELETE: { | |
| 4689 Comment cmnt(masm_, "[ UnaryOperation (DELETE)"); | |
| 4690 Property* property = expr->expression()->AsProperty(); | |
| 4691 VariableProxy* proxy = expr->expression()->AsVariableProxy(); | |
| 4692 | |
| 4693 if (property != NULL) { | |
| 4694 VisitForStackValue(property->obj()); | |
| 4695 VisitForStackValue(property->key()); | |
| 4696 __ li(a1, Operand(Smi::FromInt(language_mode()))); | |
| 4697 __ push(a1); | |
| 4698 __ InvokeBuiltin(Builtins::DELETE, CALL_FUNCTION); | |
| 4699 context()->Plug(v0); | |
| 4700 } else if (proxy != NULL) { | |
| 4701 Variable* var = proxy->var(); | |
| 4702 // Delete of an unqualified identifier is disallowed in strict mode but | |
| 4703 // "delete this" is allowed. | |
| 4704 bool is_this = var->HasThisName(isolate()); | |
| 4705 DCHECK(is_sloppy(language_mode()) || is_this); | |
| 4706 if (var->IsUnallocatedOrGlobalSlot()) { | |
| 4707 __ lw(a2, GlobalObjectOperand()); | |
| 4708 __ li(a1, Operand(var->name())); | |
| 4709 __ li(a0, Operand(Smi::FromInt(SLOPPY))); | |
| 4710 __ Push(a2, a1, a0); | |
| 4711 __ InvokeBuiltin(Builtins::DELETE, CALL_FUNCTION); | |
| 4712 context()->Plug(v0); | |
| 4713 } else if (var->IsStackAllocated() || var->IsContextSlot()) { | |
| 4714 // Result of deleting non-global, non-dynamic variables is false. | |
| 4715 // The subexpression does not have side effects. | |
| 4716 context()->Plug(is_this); | |
| 4717 } else { | |
| 4718 // Non-global variable. Call the runtime to try to delete from the | |
| 4719 // context where the variable was introduced. | |
| 4720 DCHECK(!context_register().is(a2)); | |
| 4721 __ li(a2, Operand(var->name())); | |
| 4722 __ Push(context_register(), a2); | |
| 4723 __ CallRuntime(Runtime::kDeleteLookupSlot, 2); | |
| 4724 context()->Plug(v0); | |
| 4725 } | |
| 4726 } else { | |
| 4727 // Result of deleting non-property, non-variable reference is true. | |
| 4728 // The subexpression may have side effects. | |
| 4729 VisitForEffect(expr->expression()); | |
| 4730 context()->Plug(true); | |
| 4731 } | |
| 4732 break; | |
| 4733 } | |
| 4734 | |
| 4735 case Token::VOID: { | |
| 4736 Comment cmnt(masm_, "[ UnaryOperation (VOID)"); | |
| 4737 VisitForEffect(expr->expression()); | |
| 4738 context()->Plug(Heap::kUndefinedValueRootIndex); | |
| 4739 break; | |
| 4740 } | |
| 4741 | |
| 4742 case Token::NOT: { | |
| 4743 Comment cmnt(masm_, "[ UnaryOperation (NOT)"); | |
| 4744 if (context()->IsEffect()) { | |
| 4745 // Unary NOT has no side effects so it's only necessary to visit the | |
| 4746 // subexpression. Match the optimizing compiler by not branching. | |
| 4747 VisitForEffect(expr->expression()); | |
| 4748 } else if (context()->IsTest()) { | |
| 4749 const TestContext* test = TestContext::cast(context()); | |
| 4750 // The labels are swapped for the recursive call. | |
| 4751 VisitForControl(expr->expression(), | |
| 4752 test->false_label(), | |
| 4753 test->true_label(), | |
| 4754 test->fall_through()); | |
| 4755 context()->Plug(test->true_label(), test->false_label()); | |
| 4756 } else { | |
| 4757 // We handle value contexts explicitly rather than simply visiting | |
| 4758 // for control and plugging the control flow into the context, | |
| 4759 // because we need to prepare a pair of extra administrative AST ids | |
| 4760 // for the optimizing compiler. | |
| 4761 DCHECK(context()->IsAccumulatorValue() || context()->IsStackValue()); | |
| 4762 Label materialize_true, materialize_false, done; | |
| 4763 VisitForControl(expr->expression(), | |
| 4764 &materialize_false, | |
| 4765 &materialize_true, | |
| 4766 &materialize_true); | |
| 4767 __ bind(&materialize_true); | |
| 4768 PrepareForBailoutForId(expr->MaterializeTrueId(), NO_REGISTERS); | |
| 4769 __ LoadRoot(v0, Heap::kTrueValueRootIndex); | |
| 4770 if (context()->IsStackValue()) __ push(v0); | |
| 4771 __ jmp(&done); | |
| 4772 __ bind(&materialize_false); | |
| 4773 PrepareForBailoutForId(expr->MaterializeFalseId(), NO_REGISTERS); | |
| 4774 __ LoadRoot(v0, Heap::kFalseValueRootIndex); | |
| 4775 if (context()->IsStackValue()) __ push(v0); | |
| 4776 __ bind(&done); | |
| 4777 } | |
| 4778 break; | |
| 4779 } | |
| 4780 | |
| 4781 case Token::TYPEOF: { | |
| 4782 Comment cmnt(masm_, "[ UnaryOperation (TYPEOF)"); | |
| 4783 { | |
| 4784 AccumulatorValueContext context(this); | |
| 4785 VisitForTypeofValue(expr->expression()); | |
| 4786 } | |
| 4787 __ mov(a3, v0); | |
| 4788 TypeofStub typeof_stub(isolate()); | |
| 4789 __ CallStub(&typeof_stub); | |
| 4790 context()->Plug(v0); | |
| 4791 break; | |
| 4792 } | |
| 4793 | |
| 4794 default: | |
| 4795 UNREACHABLE(); | |
| 4796 } | |
| 4797 } | |
| 4798 | |
| 4799 | |
| 4800 void FullCodeGenerator::VisitCountOperation(CountOperation* expr) { | |
| 4801 DCHECK(expr->expression()->IsValidReferenceExpressionOrThis()); | |
| 4802 | |
| 4803 Comment cmnt(masm_, "[ CountOperation"); | |
| 4804 | |
| 4805 Property* prop = expr->expression()->AsProperty(); | |
| 4806 LhsKind assign_type = Property::GetAssignType(prop); | |
| 4807 | |
| 4808 // Evaluate expression and get value. | |
| 4809 if (assign_type == VARIABLE) { | |
| 4810 DCHECK(expr->expression()->AsVariableProxy()->var() != NULL); | |
| 4811 AccumulatorValueContext context(this); | |
| 4812 EmitVariableLoad(expr->expression()->AsVariableProxy()); | |
| 4813 } else { | |
| 4814 // Reserve space for result of postfix operation. | |
| 4815 if (expr->is_postfix() && !context()->IsEffect()) { | |
| 4816 __ li(at, Operand(Smi::FromInt(0))); | |
| 4817 __ push(at); | |
| 4818 } | |
| 4819 switch (assign_type) { | |
| 4820 case NAMED_PROPERTY: { | |
| 4821 // Put the object both on the stack and in the register. | |
| 4822 VisitForStackValue(prop->obj()); | |
| 4823 __ lw(LoadDescriptor::ReceiverRegister(), MemOperand(sp, 0)); | |
| 4824 EmitNamedPropertyLoad(prop); | |
| 4825 break; | |
| 4826 } | |
| 4827 | |
| 4828 case NAMED_SUPER_PROPERTY: { | |
| 4829 VisitForStackValue(prop->obj()->AsSuperPropertyReference()->this_var()); | |
| 4830 VisitForAccumulatorValue( | |
| 4831 prop->obj()->AsSuperPropertyReference()->home_object()); | |
| 4832 __ Push(result_register()); | |
| 4833 const Register scratch = a1; | |
| 4834 __ lw(scratch, MemOperand(sp, kPointerSize)); | |
| 4835 __ Push(scratch, result_register()); | |
| 4836 EmitNamedSuperPropertyLoad(prop); | |
| 4837 break; | |
| 4838 } | |
| 4839 | |
| 4840 case KEYED_SUPER_PROPERTY: { | |
| 4841 VisitForStackValue(prop->obj()->AsSuperPropertyReference()->this_var()); | |
| 4842 VisitForAccumulatorValue( | |
| 4843 prop->obj()->AsSuperPropertyReference()->home_object()); | |
| 4844 const Register scratch = a1; | |
| 4845 const Register scratch1 = t0; | |
| 4846 __ Move(scratch, result_register()); | |
| 4847 VisitForAccumulatorValue(prop->key()); | |
| 4848 __ Push(scratch, result_register()); | |
| 4849 __ lw(scratch1, MemOperand(sp, 2 * kPointerSize)); | |
| 4850 __ Push(scratch1, scratch, result_register()); | |
| 4851 EmitKeyedSuperPropertyLoad(prop); | |
| 4852 break; | |
| 4853 } | |
| 4854 | |
| 4855 case KEYED_PROPERTY: { | |
| 4856 VisitForStackValue(prop->obj()); | |
| 4857 VisitForStackValue(prop->key()); | |
| 4858 __ lw(LoadDescriptor::ReceiverRegister(), | |
| 4859 MemOperand(sp, 1 * kPointerSize)); | |
| 4860 __ lw(LoadDescriptor::NameRegister(), MemOperand(sp, 0)); | |
| 4861 EmitKeyedPropertyLoad(prop); | |
| 4862 break; | |
| 4863 } | |
| 4864 | |
| 4865 case VARIABLE: | |
| 4866 UNREACHABLE(); | |
| 4867 } | |
| 4868 } | |
| 4869 | |
| 4870 // We need a second deoptimization point after loading the value | |
| 4871 // in case evaluating the property load my have a side effect. | |
| 4872 if (assign_type == VARIABLE) { | |
| 4873 PrepareForBailout(expr->expression(), TOS_REG); | |
| 4874 } else { | |
| 4875 PrepareForBailoutForId(prop->LoadId(), TOS_REG); | |
| 4876 } | |
| 4877 | |
| 4878 // Inline smi case if we are in a loop. | |
| 4879 Label stub_call, done; | |
| 4880 JumpPatchSite patch_site(masm_); | |
| 4881 | |
| 4882 int count_value = expr->op() == Token::INC ? 1 : -1; | |
| 4883 __ mov(a0, v0); | |
| 4884 if (ShouldInlineSmiCase(expr->op())) { | |
| 4885 Label slow; | |
| 4886 patch_site.EmitJumpIfNotSmi(v0, &slow); | |
| 4887 | |
| 4888 // Save result for postfix expressions. | |
| 4889 if (expr->is_postfix()) { | |
| 4890 if (!context()->IsEffect()) { | |
| 4891 // Save the result on the stack. If we have a named or keyed property | |
| 4892 // we store the result under the receiver that is currently on top | |
| 4893 // of the stack. | |
| 4894 switch (assign_type) { | |
| 4895 case VARIABLE: | |
| 4896 __ push(v0); | |
| 4897 break; | |
| 4898 case NAMED_PROPERTY: | |
| 4899 __ sw(v0, MemOperand(sp, kPointerSize)); | |
| 4900 break; | |
| 4901 case NAMED_SUPER_PROPERTY: | |
| 4902 __ sw(v0, MemOperand(sp, 2 * kPointerSize)); | |
| 4903 break; | |
| 4904 case KEYED_PROPERTY: | |
| 4905 __ sw(v0, MemOperand(sp, 2 * kPointerSize)); | |
| 4906 break; | |
| 4907 case KEYED_SUPER_PROPERTY: | |
| 4908 __ sw(v0, MemOperand(sp, 3 * kPointerSize)); | |
| 4909 break; | |
| 4910 } | |
| 4911 } | |
| 4912 } | |
| 4913 | |
| 4914 Register scratch1 = a1; | |
| 4915 Register scratch2 = t0; | |
| 4916 __ li(scratch1, Operand(Smi::FromInt(count_value))); | |
| 4917 __ AdduAndCheckForOverflow(v0, v0, scratch1, scratch2); | |
| 4918 __ BranchOnNoOverflow(&done, scratch2); | |
| 4919 // Call stub. Undo operation first. | |
| 4920 __ Move(v0, a0); | |
| 4921 __ jmp(&stub_call); | |
| 4922 __ bind(&slow); | |
| 4923 } | |
| 4924 if (!is_strong(language_mode())) { | |
| 4925 ToNumberStub convert_stub(isolate()); | |
| 4926 __ CallStub(&convert_stub); | |
| 4927 PrepareForBailoutForId(expr->ToNumberId(), TOS_REG); | |
| 4928 } | |
| 4929 | |
| 4930 // Save result for postfix expressions. | |
| 4931 if (expr->is_postfix()) { | |
| 4932 if (!context()->IsEffect()) { | |
| 4933 // Save the result on the stack. If we have a named or keyed property | |
| 4934 // we store the result under the receiver that is currently on top | |
| 4935 // of the stack. | |
| 4936 switch (assign_type) { | |
| 4937 case VARIABLE: | |
| 4938 __ push(v0); | |
| 4939 break; | |
| 4940 case NAMED_PROPERTY: | |
| 4941 __ sw(v0, MemOperand(sp, kPointerSize)); | |
| 4942 break; | |
| 4943 case NAMED_SUPER_PROPERTY: | |
| 4944 __ sw(v0, MemOperand(sp, 2 * kPointerSize)); | |
| 4945 break; | |
| 4946 case KEYED_PROPERTY: | |
| 4947 __ sw(v0, MemOperand(sp, 2 * kPointerSize)); | |
| 4948 break; | |
| 4949 case KEYED_SUPER_PROPERTY: | |
| 4950 __ sw(v0, MemOperand(sp, 3 * kPointerSize)); | |
| 4951 break; | |
| 4952 } | |
| 4953 } | |
| 4954 } | |
| 4955 | |
| 4956 __ bind(&stub_call); | |
| 4957 __ mov(a1, v0); | |
| 4958 __ li(a0, Operand(Smi::FromInt(count_value))); | |
| 4959 | |
| 4960 SetExpressionPosition(expr); | |
| 4961 | |
| 4962 | |
| 4963 Handle<Code> code = CodeFactory::BinaryOpIC(isolate(), Token::ADD, | |
| 4964 strength(language_mode())).code(); | |
| 4965 CallIC(code, expr->CountBinOpFeedbackId()); | |
| 4966 patch_site.EmitPatchInfo(); | |
| 4967 __ bind(&done); | |
| 4968 | |
| 4969 if (is_strong(language_mode())) { | |
| 4970 PrepareForBailoutForId(expr->ToNumberId(), TOS_REG); | |
| 4971 } | |
| 4972 // Store the value returned in v0. | |
| 4973 switch (assign_type) { | |
| 4974 case VARIABLE: | |
| 4975 if (expr->is_postfix()) { | |
| 4976 { EffectContext context(this); | |
| 4977 EmitVariableAssignment(expr->expression()->AsVariableProxy()->var(), | |
| 4978 Token::ASSIGN, expr->CountSlot()); | |
| 4979 PrepareForBailoutForId(expr->AssignmentId(), TOS_REG); | |
| 4980 context.Plug(v0); | |
| 4981 } | |
| 4982 // For all contexts except EffectConstant we have the result on | |
| 4983 // top of the stack. | |
| 4984 if (!context()->IsEffect()) { | |
| 4985 context()->PlugTOS(); | |
| 4986 } | |
| 4987 } else { | |
| 4988 EmitVariableAssignment(expr->expression()->AsVariableProxy()->var(), | |
| 4989 Token::ASSIGN, expr->CountSlot()); | |
| 4990 PrepareForBailoutForId(expr->AssignmentId(), TOS_REG); | |
| 4991 context()->Plug(v0); | |
| 4992 } | |
| 4993 break; | |
| 4994 case NAMED_PROPERTY: { | |
| 4995 __ mov(StoreDescriptor::ValueRegister(), result_register()); | |
| 4996 __ li(StoreDescriptor::NameRegister(), | |
| 4997 Operand(prop->key()->AsLiteral()->value())); | |
| 4998 __ pop(StoreDescriptor::ReceiverRegister()); | |
| 4999 if (FLAG_vector_stores) { | |
| 5000 EmitLoadStoreICSlot(expr->CountSlot()); | |
| 5001 CallStoreIC(); | |
| 5002 } else { | |
| 5003 CallStoreIC(expr->CountStoreFeedbackId()); | |
| 5004 } | |
| 5005 PrepareForBailoutForId(expr->AssignmentId(), TOS_REG); | |
| 5006 if (expr->is_postfix()) { | |
| 5007 if (!context()->IsEffect()) { | |
| 5008 context()->PlugTOS(); | |
| 5009 } | |
| 5010 } else { | |
| 5011 context()->Plug(v0); | |
| 5012 } | |
| 5013 break; | |
| 5014 } | |
| 5015 case NAMED_SUPER_PROPERTY: { | |
| 5016 EmitNamedSuperPropertyStore(prop); | |
| 5017 if (expr->is_postfix()) { | |
| 5018 if (!context()->IsEffect()) { | |
| 5019 context()->PlugTOS(); | |
| 5020 } | |
| 5021 } else { | |
| 5022 context()->Plug(v0); | |
| 5023 } | |
| 5024 break; | |
| 5025 } | |
| 5026 case KEYED_SUPER_PROPERTY: { | |
| 5027 EmitKeyedSuperPropertyStore(prop); | |
| 5028 if (expr->is_postfix()) { | |
| 5029 if (!context()->IsEffect()) { | |
| 5030 context()->PlugTOS(); | |
| 5031 } | |
| 5032 } else { | |
| 5033 context()->Plug(v0); | |
| 5034 } | |
| 5035 break; | |
| 5036 } | |
| 5037 case KEYED_PROPERTY: { | |
| 5038 __ mov(StoreDescriptor::ValueRegister(), result_register()); | |
| 5039 __ Pop(StoreDescriptor::ReceiverRegister(), | |
| 5040 StoreDescriptor::NameRegister()); | |
| 5041 Handle<Code> ic = | |
| 5042 CodeFactory::KeyedStoreIC(isolate(), language_mode()).code(); | |
| 5043 if (FLAG_vector_stores) { | |
| 5044 EmitLoadStoreICSlot(expr->CountSlot()); | |
| 5045 CallIC(ic); | |
| 5046 } else { | |
| 5047 CallIC(ic, expr->CountStoreFeedbackId()); | |
| 5048 } | |
| 5049 PrepareForBailoutForId(expr->AssignmentId(), TOS_REG); | |
| 5050 if (expr->is_postfix()) { | |
| 5051 if (!context()->IsEffect()) { | |
| 5052 context()->PlugTOS(); | |
| 5053 } | |
| 5054 } else { | |
| 5055 context()->Plug(v0); | |
| 5056 } | |
| 5057 break; | |
| 5058 } | |
| 5059 } | |
| 5060 } | |
| 5061 | |
| 5062 | |
| 5063 void FullCodeGenerator::EmitLiteralCompareTypeof(Expression* expr, | |
| 5064 Expression* sub_expr, | |
| 5065 Handle<String> check) { | |
| 5066 Label materialize_true, materialize_false; | |
| 5067 Label* if_true = NULL; | |
| 5068 Label* if_false = NULL; | |
| 5069 Label* fall_through = NULL; | |
| 5070 context()->PrepareTest(&materialize_true, &materialize_false, | |
| 5071 &if_true, &if_false, &fall_through); | |
| 5072 | |
| 5073 { AccumulatorValueContext context(this); | |
| 5074 VisitForTypeofValue(sub_expr); | |
| 5075 } | |
| 5076 PrepareForBailoutBeforeSplit(expr, true, if_true, if_false); | |
| 5077 | |
| 5078 Factory* factory = isolate()->factory(); | |
| 5079 if (String::Equals(check, factory->number_string())) { | |
| 5080 __ JumpIfSmi(v0, if_true); | |
| 5081 __ lw(v0, FieldMemOperand(v0, HeapObject::kMapOffset)); | |
| 5082 __ LoadRoot(at, Heap::kHeapNumberMapRootIndex); | |
| 5083 Split(eq, v0, Operand(at), if_true, if_false, fall_through); | |
| 5084 } else if (String::Equals(check, factory->string_string())) { | |
| 5085 __ JumpIfSmi(v0, if_false); | |
| 5086 // Check for undetectable objects => false. | |
| 5087 __ GetObjectType(v0, v0, a1); | |
| 5088 __ Branch(if_false, ge, a1, Operand(FIRST_NONSTRING_TYPE)); | |
| 5089 __ lbu(a1, FieldMemOperand(v0, Map::kBitFieldOffset)); | |
| 5090 __ And(a1, a1, Operand(1 << Map::kIsUndetectable)); | |
| 5091 Split(eq, a1, Operand(zero_reg), | |
| 5092 if_true, if_false, fall_through); | |
| 5093 } else if (String::Equals(check, factory->symbol_string())) { | |
| 5094 __ JumpIfSmi(v0, if_false); | |
| 5095 __ GetObjectType(v0, v0, a1); | |
| 5096 Split(eq, a1, Operand(SYMBOL_TYPE), if_true, if_false, fall_through); | |
| 5097 } else if (String::Equals(check, factory->float32x4_string())) { | |
| 5098 __ JumpIfSmi(v0, if_false); | |
| 5099 __ GetObjectType(v0, v0, a1); | |
| 5100 Split(eq, a1, Operand(FLOAT32X4_TYPE), if_true, if_false, fall_through); | |
| 5101 } else if (String::Equals(check, factory->boolean_string())) { | |
| 5102 __ LoadRoot(at, Heap::kTrueValueRootIndex); | |
| 5103 __ Branch(if_true, eq, v0, Operand(at)); | |
| 5104 __ LoadRoot(at, Heap::kFalseValueRootIndex); | |
| 5105 Split(eq, v0, Operand(at), if_true, if_false, fall_through); | |
| 5106 } else if (String::Equals(check, factory->undefined_string())) { | |
| 5107 __ LoadRoot(at, Heap::kUndefinedValueRootIndex); | |
| 5108 __ Branch(if_true, eq, v0, Operand(at)); | |
| 5109 __ JumpIfSmi(v0, if_false); | |
| 5110 // Check for undetectable objects => true. | |
| 5111 __ lw(v0, FieldMemOperand(v0, HeapObject::kMapOffset)); | |
| 5112 __ lbu(a1, FieldMemOperand(v0, Map::kBitFieldOffset)); | |
| 5113 __ And(a1, a1, Operand(1 << Map::kIsUndetectable)); | |
| 5114 Split(ne, a1, Operand(zero_reg), if_true, if_false, fall_through); | |
| 5115 } else if (String::Equals(check, factory->function_string())) { | |
| 5116 __ JumpIfSmi(v0, if_false); | |
| 5117 STATIC_ASSERT(NUM_OF_CALLABLE_SPEC_OBJECT_TYPES == 2); | |
| 5118 __ GetObjectType(v0, v0, a1); | |
| 5119 __ Branch(if_true, eq, a1, Operand(JS_FUNCTION_TYPE)); | |
| 5120 Split(eq, a1, Operand(JS_FUNCTION_PROXY_TYPE), | |
| 5121 if_true, if_false, fall_through); | |
| 5122 } else if (String::Equals(check, factory->object_string())) { | |
| 5123 __ JumpIfSmi(v0, if_false); | |
| 5124 __ LoadRoot(at, Heap::kNullValueRootIndex); | |
| 5125 __ Branch(if_true, eq, v0, Operand(at)); | |
| 5126 // Check for JS objects => true. | |
| 5127 __ GetObjectType(v0, v0, a1); | |
| 5128 __ Branch(if_false, lt, a1, Operand(FIRST_NONCALLABLE_SPEC_OBJECT_TYPE)); | |
| 5129 __ lbu(a1, FieldMemOperand(v0, Map::kInstanceTypeOffset)); | |
| 5130 __ Branch(if_false, gt, a1, Operand(LAST_NONCALLABLE_SPEC_OBJECT_TYPE)); | |
| 5131 // Check for undetectable objects => false. | |
| 5132 __ lbu(a1, FieldMemOperand(v0, Map::kBitFieldOffset)); | |
| 5133 __ And(a1, a1, Operand(1 << Map::kIsUndetectable)); | |
| 5134 Split(eq, a1, Operand(zero_reg), if_true, if_false, fall_through); | |
| 5135 } else { | |
| 5136 if (if_false != fall_through) __ jmp(if_false); | |
| 5137 } | |
| 5138 context()->Plug(if_true, if_false); | |
| 5139 } | |
| 5140 | |
| 5141 | |
| 5142 void FullCodeGenerator::VisitCompareOperation(CompareOperation* expr) { | |
| 5143 Comment cmnt(masm_, "[ CompareOperation"); | |
| 5144 SetExpressionPosition(expr); | |
| 5145 | |
| 5146 // First we try a fast inlined version of the compare when one of | |
| 5147 // the operands is a literal. | |
| 5148 if (TryLiteralCompare(expr)) return; | |
| 5149 | |
| 5150 // Always perform the comparison for its control flow. Pack the result | |
| 5151 // into the expression's context after the comparison is performed. | |
| 5152 Label materialize_true, materialize_false; | |
| 5153 Label* if_true = NULL; | |
| 5154 Label* if_false = NULL; | |
| 5155 Label* fall_through = NULL; | |
| 5156 context()->PrepareTest(&materialize_true, &materialize_false, | |
| 5157 &if_true, &if_false, &fall_through); | |
| 5158 | |
| 5159 Token::Value op = expr->op(); | |
| 5160 VisitForStackValue(expr->left()); | |
| 5161 switch (op) { | |
| 5162 case Token::IN: | |
| 5163 VisitForStackValue(expr->right()); | |
| 5164 __ InvokeBuiltin(Builtins::IN, CALL_FUNCTION); | |
| 5165 PrepareForBailoutBeforeSplit(expr, false, NULL, NULL); | |
| 5166 __ LoadRoot(t0, Heap::kTrueValueRootIndex); | |
| 5167 Split(eq, v0, Operand(t0), if_true, if_false, fall_through); | |
| 5168 break; | |
| 5169 | |
| 5170 case Token::INSTANCEOF: { | |
| 5171 VisitForStackValue(expr->right()); | |
| 5172 InstanceofStub stub(isolate(), InstanceofStub::kNoFlags); | |
| 5173 __ CallStub(&stub); | |
| 5174 PrepareForBailoutBeforeSplit(expr, true, if_true, if_false); | |
| 5175 // The stub returns 0 for true. | |
| 5176 Split(eq, v0, Operand(zero_reg), if_true, if_false, fall_through); | |
| 5177 break; | |
| 5178 } | |
| 5179 | |
| 5180 default: { | |
| 5181 VisitForAccumulatorValue(expr->right()); | |
| 5182 Condition cc = CompareIC::ComputeCondition(op); | |
| 5183 __ mov(a0, result_register()); | |
| 5184 __ pop(a1); | |
| 5185 | |
| 5186 bool inline_smi_code = ShouldInlineSmiCase(op); | |
| 5187 JumpPatchSite patch_site(masm_); | |
| 5188 if (inline_smi_code) { | |
| 5189 Label slow_case; | |
| 5190 __ Or(a2, a0, Operand(a1)); | |
| 5191 patch_site.EmitJumpIfNotSmi(a2, &slow_case); | |
| 5192 Split(cc, a1, Operand(a0), if_true, if_false, NULL); | |
| 5193 __ bind(&slow_case); | |
| 5194 } | |
| 5195 | |
| 5196 Handle<Code> ic = CodeFactory::CompareIC( | |
| 5197 isolate(), op, strength(language_mode())).code(); | |
| 5198 CallIC(ic, expr->CompareOperationFeedbackId()); | |
| 5199 patch_site.EmitPatchInfo(); | |
| 5200 PrepareForBailoutBeforeSplit(expr, true, if_true, if_false); | |
| 5201 Split(cc, v0, Operand(zero_reg), if_true, if_false, fall_through); | |
| 5202 } | |
| 5203 } | |
| 5204 | |
| 5205 // Convert the result of the comparison into one expected for this | |
| 5206 // expression's context. | |
| 5207 context()->Plug(if_true, if_false); | |
| 5208 } | |
| 5209 | |
| 5210 | |
| 5211 void FullCodeGenerator::EmitLiteralCompareNil(CompareOperation* expr, | |
| 5212 Expression* sub_expr, | |
| 5213 NilValue nil) { | |
| 5214 Label materialize_true, materialize_false; | |
| 5215 Label* if_true = NULL; | |
| 5216 Label* if_false = NULL; | |
| 5217 Label* fall_through = NULL; | |
| 5218 context()->PrepareTest(&materialize_true, &materialize_false, | |
| 5219 &if_true, &if_false, &fall_through); | |
| 5220 | |
| 5221 VisitForAccumulatorValue(sub_expr); | |
| 5222 PrepareForBailoutBeforeSplit(expr, true, if_true, if_false); | |
| 5223 __ mov(a0, result_register()); | |
| 5224 if (expr->op() == Token::EQ_STRICT) { | |
| 5225 Heap::RootListIndex nil_value = nil == kNullValue ? | |
| 5226 Heap::kNullValueRootIndex : | |
| 5227 Heap::kUndefinedValueRootIndex; | |
| 5228 __ LoadRoot(a1, nil_value); | |
| 5229 Split(eq, a0, Operand(a1), if_true, if_false, fall_through); | |
| 5230 } else { | |
| 5231 Handle<Code> ic = CompareNilICStub::GetUninitialized(isolate(), nil); | |
| 5232 CallIC(ic, expr->CompareOperationFeedbackId()); | |
| 5233 Split(ne, v0, Operand(zero_reg), if_true, if_false, fall_through); | |
| 5234 } | |
| 5235 context()->Plug(if_true, if_false); | |
| 5236 } | |
| 5237 | |
| 5238 | |
| 5239 void FullCodeGenerator::VisitThisFunction(ThisFunction* expr) { | |
| 5240 __ lw(v0, MemOperand(fp, JavaScriptFrameConstants::kFunctionOffset)); | |
| 5241 context()->Plug(v0); | |
| 5242 } | |
| 5243 | |
| 5244 | |
| 5245 Register FullCodeGenerator::result_register() { | |
| 5246 return v0; | |
| 5247 } | |
| 5248 | |
| 5249 | |
| 5250 Register FullCodeGenerator::context_register() { | |
| 5251 return cp; | |
| 5252 } | |
| 5253 | |
| 5254 | |
| 5255 void FullCodeGenerator::StoreToFrameField(int frame_offset, Register value) { | |
| 5256 DCHECK_EQ(POINTER_SIZE_ALIGN(frame_offset), frame_offset); | |
| 5257 __ sw(value, MemOperand(fp, frame_offset)); | |
| 5258 } | |
| 5259 | |
| 5260 | |
| 5261 void FullCodeGenerator::LoadContextField(Register dst, int context_index) { | |
| 5262 __ lw(dst, ContextOperand(cp, context_index)); | |
| 5263 } | |
| 5264 | |
| 5265 | |
| 5266 void FullCodeGenerator::PushFunctionArgumentForContextAllocation() { | |
| 5267 Scope* declaration_scope = scope()->DeclarationScope(); | |
| 5268 if (declaration_scope->is_script_scope() || | |
| 5269 declaration_scope->is_module_scope()) { | |
| 5270 // Contexts nested in the native context have a canonical empty function | |
| 5271 // as their closure, not the anonymous closure containing the global | |
| 5272 // code. Pass a smi sentinel and let the runtime look up the empty | |
| 5273 // function. | |
| 5274 __ li(at, Operand(Smi::FromInt(0))); | |
| 5275 } else if (declaration_scope->is_eval_scope()) { | |
| 5276 // Contexts created by a call to eval have the same closure as the | |
| 5277 // context calling eval, not the anonymous closure containing the eval | |
| 5278 // code. Fetch it from the context. | |
| 5279 __ lw(at, ContextOperand(cp, Context::CLOSURE_INDEX)); | |
| 5280 } else { | |
| 5281 DCHECK(declaration_scope->is_function_scope()); | |
| 5282 __ lw(at, MemOperand(fp, JavaScriptFrameConstants::kFunctionOffset)); | |
| 5283 } | |
| 5284 __ push(at); | |
| 5285 } | |
| 5286 | |
| 5287 | |
| 5288 // ---------------------------------------------------------------------------- | |
| 5289 // Non-local control flow support. | |
| 5290 | |
| 5291 void FullCodeGenerator::EnterFinallyBlock() { | |
| 5292 DCHECK(!result_register().is(a1)); | |
| 5293 // Store result register while executing finally block. | |
| 5294 __ push(result_register()); | |
| 5295 // Cook return address in link register to stack (smi encoded Code* delta). | |
| 5296 __ Subu(a1, ra, Operand(masm_->CodeObject())); | |
| 5297 DCHECK_EQ(1, kSmiTagSize + kSmiShiftSize); | |
| 5298 STATIC_ASSERT(0 == kSmiTag); | |
| 5299 __ Addu(a1, a1, Operand(a1)); // Convert to smi. | |
| 5300 | |
| 5301 // Store result register while executing finally block. | |
| 5302 __ push(a1); | |
| 5303 | |
| 5304 // Store pending message while executing finally block. | |
| 5305 ExternalReference pending_message_obj = | |
| 5306 ExternalReference::address_of_pending_message_obj(isolate()); | |
| 5307 __ li(at, Operand(pending_message_obj)); | |
| 5308 __ lw(a1, MemOperand(at)); | |
| 5309 __ push(a1); | |
| 5310 | |
| 5311 ClearPendingMessage(); | |
| 5312 } | |
| 5313 | |
| 5314 | |
| 5315 void FullCodeGenerator::ExitFinallyBlock() { | |
| 5316 DCHECK(!result_register().is(a1)); | |
| 5317 // Restore pending message from stack. | |
| 5318 __ pop(a1); | |
| 5319 ExternalReference pending_message_obj = | |
| 5320 ExternalReference::address_of_pending_message_obj(isolate()); | |
| 5321 __ li(at, Operand(pending_message_obj)); | |
| 5322 __ sw(a1, MemOperand(at)); | |
| 5323 | |
| 5324 // Restore result register from stack. | |
| 5325 __ pop(a1); | |
| 5326 | |
| 5327 // Uncook return address and return. | |
| 5328 __ pop(result_register()); | |
| 5329 DCHECK_EQ(1, kSmiTagSize + kSmiShiftSize); | |
| 5330 __ sra(a1, a1, 1); // Un-smi-tag value. | |
| 5331 __ Addu(at, a1, Operand(masm_->CodeObject())); | |
| 5332 __ Jump(at); | |
| 5333 } | |
| 5334 | |
| 5335 | |
| 5336 void FullCodeGenerator::ClearPendingMessage() { | |
| 5337 DCHECK(!result_register().is(a1)); | |
| 5338 ExternalReference pending_message_obj = | |
| 5339 ExternalReference::address_of_pending_message_obj(isolate()); | |
| 5340 __ LoadRoot(a1, Heap::kTheHoleValueRootIndex); | |
| 5341 __ li(at, Operand(pending_message_obj)); | |
| 5342 __ sw(a1, MemOperand(at)); | |
| 5343 } | |
| 5344 | |
| 5345 | |
| 5346 void FullCodeGenerator::EmitLoadStoreICSlot(FeedbackVectorICSlot slot) { | |
| 5347 DCHECK(FLAG_vector_stores && !slot.IsInvalid()); | |
| 5348 __ li(VectorStoreICTrampolineDescriptor::SlotRegister(), | |
| 5349 Operand(SmiFromSlot(slot))); | |
| 5350 } | |
| 5351 | |
| 5352 | |
| 5353 #undef __ | |
| 5354 | |
| 5355 | |
| 5356 void BackEdgeTable::PatchAt(Code* unoptimized_code, | |
| 5357 Address pc, | |
| 5358 BackEdgeState target_state, | |
| 5359 Code* replacement_code) { | |
| 5360 static const int kInstrSize = Assembler::kInstrSize; | |
| 5361 Address branch_address = pc - 6 * kInstrSize; | |
| 5362 CodePatcher patcher(branch_address, 1); | |
| 5363 | |
| 5364 switch (target_state) { | |
| 5365 case INTERRUPT: | |
| 5366 // slt at, a3, zero_reg (in case of count based interrupts) | |
| 5367 // beq at, zero_reg, ok | |
| 5368 // lui t9, <interrupt stub address> upper | |
| 5369 // ori t9, <interrupt stub address> lower | |
| 5370 // jalr t9 | |
| 5371 // nop | |
| 5372 // ok-label ----- pc_after points here | |
| 5373 patcher.masm()->slt(at, a3, zero_reg); | |
| 5374 break; | |
| 5375 case ON_STACK_REPLACEMENT: | |
| 5376 case OSR_AFTER_STACK_CHECK: | |
| 5377 // addiu at, zero_reg, 1 | |
| 5378 // beq at, zero_reg, ok ;; Not changed | |
| 5379 // lui t9, <on-stack replacement address> upper | |
| 5380 // ori t9, <on-stack replacement address> lower | |
| 5381 // jalr t9 ;; Not changed | |
| 5382 // nop ;; Not changed | |
| 5383 // ok-label ----- pc_after points here | |
| 5384 patcher.masm()->addiu(at, zero_reg, 1); | |
| 5385 break; | |
| 5386 } | |
| 5387 Address pc_immediate_load_address = pc - 4 * kInstrSize; | |
| 5388 // Replace the stack check address in the load-immediate (lui/ori pair) | |
| 5389 // with the entry address of the replacement code. | |
| 5390 Assembler::set_target_address_at(pc_immediate_load_address, | |
| 5391 replacement_code->entry()); | |
| 5392 | |
| 5393 unoptimized_code->GetHeap()->incremental_marking()->RecordCodeTargetPatch( | |
| 5394 unoptimized_code, pc_immediate_load_address, replacement_code); | |
| 5395 } | |
| 5396 | |
| 5397 | |
| 5398 BackEdgeTable::BackEdgeState BackEdgeTable::GetBackEdgeState( | |
| 5399 Isolate* isolate, | |
| 5400 Code* unoptimized_code, | |
| 5401 Address pc) { | |
| 5402 static const int kInstrSize = Assembler::kInstrSize; | |
| 5403 Address branch_address = pc - 6 * kInstrSize; | |
| 5404 Address pc_immediate_load_address = pc - 4 * kInstrSize; | |
| 5405 | |
| 5406 DCHECK(Assembler::IsBeq(Assembler::instr_at(pc - 5 * kInstrSize))); | |
| 5407 if (!Assembler::IsAddImmediate(Assembler::instr_at(branch_address))) { | |
| 5408 DCHECK(reinterpret_cast<uint32_t>( | |
| 5409 Assembler::target_address_at(pc_immediate_load_address)) == | |
| 5410 reinterpret_cast<uint32_t>( | |
| 5411 isolate->builtins()->InterruptCheck()->entry())); | |
| 5412 return INTERRUPT; | |
| 5413 } | |
| 5414 | |
| 5415 DCHECK(Assembler::IsAddImmediate(Assembler::instr_at(branch_address))); | |
| 5416 | |
| 5417 if (reinterpret_cast<uint32_t>( | |
| 5418 Assembler::target_address_at(pc_immediate_load_address)) == | |
| 5419 reinterpret_cast<uint32_t>( | |
| 5420 isolate->builtins()->OnStackReplacement()->entry())) { | |
| 5421 return ON_STACK_REPLACEMENT; | |
| 5422 } | |
| 5423 | |
| 5424 DCHECK(reinterpret_cast<uint32_t>( | |
| 5425 Assembler::target_address_at(pc_immediate_load_address)) == | |
| 5426 reinterpret_cast<uint32_t>( | |
| 5427 isolate->builtins()->OsrAfterStackCheck()->entry())); | |
| 5428 return OSR_AFTER_STACK_CHECK; | |
| 5429 } | |
| 5430 | |
| 5431 | |
| 5432 } // namespace internal | |
| 5433 } // namespace v8 | |
| 5434 | |
| 5435 #endif // V8_TARGET_ARCH_MIPS | |
| OLD | NEW |