Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1 | // Copyright 2015 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/interpreter/bytecode-generator.h" |
| 6 | |
| 7 | #include "src/ast/scopes.h" |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 8 | #include "src/code-stubs.h" |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 9 | #include "src/compiler.h" |
| 10 | #include "src/interpreter/bytecode-register-allocator.h" |
| 11 | #include "src/interpreter/control-flow-builders.h" |
| 12 | #include "src/objects.h" |
| 13 | #include "src/parsing/parser.h" |
| 14 | #include "src/parsing/token.h" |
| 15 | |
| 16 | namespace v8 { |
| 17 | namespace internal { |
| 18 | namespace interpreter { |
| 19 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 20 | // Scoped class tracking context objects created by the visitor. Represents |
| 21 | // mutations of the context chain within the function body, allowing pushing and |
| 22 | // popping of the current {context_register} during visitation. |
| 23 | class BytecodeGenerator::ContextScope BASE_EMBEDDED { |
| 24 | public: |
| 25 | ContextScope(BytecodeGenerator* generator, Scope* scope, |
| 26 | bool should_pop_context = true) |
| 27 | : generator_(generator), |
| 28 | scope_(scope), |
| 29 | outer_(generator_->execution_context()), |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 30 | register_(Register::current_context()), |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 31 | depth_(0), |
| 32 | should_pop_context_(should_pop_context) { |
| 33 | if (outer_) { |
| 34 | depth_ = outer_->depth_ + 1; |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 35 | |
| 36 | // Push the outer context into a new context register. |
| 37 | Register outer_context_reg(builder()->first_context_register().index() + |
| 38 | outer_->depth_); |
| 39 | outer_->set_register(outer_context_reg); |
| 40 | generator_->builder()->PushContext(outer_context_reg); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 41 | } |
| 42 | generator_->set_execution_context(this); |
| 43 | } |
| 44 | |
| 45 | ~ContextScope() { |
| 46 | if (outer_ && should_pop_context_) { |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 47 | DCHECK_EQ(register_.index(), Register::current_context().index()); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 48 | generator_->builder()->PopContext(outer_->reg()); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 49 | outer_->set_register(register_); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 50 | } |
| 51 | generator_->set_execution_context(outer_); |
| 52 | } |
| 53 | |
| 54 | // Returns the depth of the given |scope| for the current execution context. |
| 55 | int ContextChainDepth(Scope* scope) { |
| 56 | return scope_->ContextChainLength(scope); |
| 57 | } |
| 58 | |
| 59 | // Returns the execution context at |depth| in the current context chain if it |
| 60 | // is a function local execution context, otherwise returns nullptr. |
| 61 | ContextScope* Previous(int depth) { |
| 62 | if (depth > depth_) { |
| 63 | return nullptr; |
| 64 | } |
| 65 | |
| 66 | ContextScope* previous = this; |
| 67 | for (int i = depth; i > 0; --i) { |
| 68 | previous = previous->outer_; |
| 69 | } |
| 70 | return previous; |
| 71 | } |
| 72 | |
| 73 | Scope* scope() const { return scope_; } |
| 74 | Register reg() const { return register_; } |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 75 | bool ShouldPopContext() { return should_pop_context_; } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 76 | |
| 77 | private: |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 78 | const BytecodeArrayBuilder* builder() const { return generator_->builder(); } |
| 79 | |
| 80 | void set_register(Register reg) { register_ = reg; } |
| 81 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 82 | BytecodeGenerator* generator_; |
| 83 | Scope* scope_; |
| 84 | ContextScope* outer_; |
| 85 | Register register_; |
| 86 | int depth_; |
| 87 | bool should_pop_context_; |
| 88 | }; |
| 89 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 90 | // Scoped class for tracking control statements entered by the |
| 91 | // visitor. The pattern derives AstGraphBuilder::ControlScope. |
| 92 | class BytecodeGenerator::ControlScope BASE_EMBEDDED { |
| 93 | public: |
| 94 | explicit ControlScope(BytecodeGenerator* generator) |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 95 | : generator_(generator), outer_(generator->execution_control()), |
| 96 | context_(generator->execution_context()) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 97 | generator_->set_execution_control(this); |
| 98 | } |
| 99 | virtual ~ControlScope() { generator_->set_execution_control(outer()); } |
| 100 | |
| 101 | void Break(Statement* stmt) { PerformCommand(CMD_BREAK, stmt); } |
| 102 | void Continue(Statement* stmt) { PerformCommand(CMD_CONTINUE, stmt); } |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 103 | void ReturnAccumulator() { PerformCommand(CMD_RETURN, nullptr); } |
| 104 | void ReThrowAccumulator() { PerformCommand(CMD_RETHROW, nullptr); } |
| 105 | |
| 106 | class DeferredCommands; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 107 | |
| 108 | protected: |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 109 | enum Command { CMD_BREAK, CMD_CONTINUE, CMD_RETURN, CMD_RETHROW }; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 110 | void PerformCommand(Command command, Statement* statement); |
| 111 | virtual bool Execute(Command command, Statement* statement) = 0; |
| 112 | |
| 113 | BytecodeGenerator* generator() const { return generator_; } |
| 114 | ControlScope* outer() const { return outer_; } |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 115 | ContextScope* context() const { return context_; } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 116 | |
| 117 | private: |
| 118 | BytecodeGenerator* generator_; |
| 119 | ControlScope* outer_; |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 120 | ContextScope* context_; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 121 | |
| 122 | DISALLOW_COPY_AND_ASSIGN(ControlScope); |
| 123 | }; |
| 124 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 125 | // Helper class for a try-finally control scope. It can record intercepted |
| 126 | // control-flow commands that cause entry into a finally-block, and re-apply |
| 127 | // them after again leaving that block. Special tokens are used to identify |
| 128 | // paths going through the finally-block to dispatch after leaving the block. |
| 129 | class BytecodeGenerator::ControlScope::DeferredCommands final { |
| 130 | public: |
| 131 | DeferredCommands(BytecodeGenerator* generator, Register token_register, |
| 132 | Register result_register) |
| 133 | : generator_(generator), |
| 134 | deferred_(generator->zone()), |
| 135 | token_register_(token_register), |
| 136 | result_register_(result_register) {} |
| 137 | |
| 138 | // One recorded control-flow command. |
| 139 | struct Entry { |
| 140 | Command command; // The command type being applied on this path. |
| 141 | Statement* statement; // The target statement for the command or {nullptr}. |
| 142 | int token; // A token identifying this particular path. |
| 143 | }; |
| 144 | |
| 145 | // Records a control-flow command while entering the finally-block. This also |
| 146 | // generates a new dispatch token that identifies one particular path. This |
| 147 | // expects the result to be in the accumulator. |
| 148 | void RecordCommand(Command command, Statement* statement) { |
| 149 | int token = static_cast<int>(deferred_.size()); |
| 150 | deferred_.push_back({command, statement, token}); |
| 151 | |
| 152 | builder()->StoreAccumulatorInRegister(result_register_); |
| 153 | builder()->LoadLiteral(Smi::FromInt(token)); |
| 154 | builder()->StoreAccumulatorInRegister(token_register_); |
| 155 | } |
| 156 | |
| 157 | // Records the dispatch token to be used to identify the re-throw path when |
| 158 | // the finally-block has been entered through the exception handler. This |
| 159 | // expects the exception to be in the accumulator. |
| 160 | void RecordHandlerReThrowPath() { |
| 161 | // The accumulator contains the exception object. |
| 162 | RecordCommand(CMD_RETHROW, nullptr); |
| 163 | } |
| 164 | |
| 165 | // Records the dispatch token to be used to identify the implicit fall-through |
| 166 | // path at the end of a try-block into the corresponding finally-block. |
| 167 | void RecordFallThroughPath() { |
| 168 | builder()->LoadLiteral(Smi::FromInt(-1)); |
| 169 | builder()->StoreAccumulatorInRegister(token_register_); |
| 170 | } |
| 171 | |
| 172 | // Applies all recorded control-flow commands after the finally-block again. |
| 173 | // This generates a dynamic dispatch on the token from the entry point. |
| 174 | void ApplyDeferredCommands() { |
| 175 | // The fall-through path is covered by the default case, hence +1 here. |
| 176 | SwitchBuilder dispatch(builder(), static_cast<int>(deferred_.size() + 1)); |
| 177 | for (size_t i = 0; i < deferred_.size(); ++i) { |
| 178 | Entry& entry = deferred_[i]; |
| 179 | builder()->LoadLiteral(Smi::FromInt(entry.token)); |
| 180 | builder()->CompareOperation(Token::EQ_STRICT, token_register_); |
| 181 | dispatch.Case(static_cast<int>(i)); |
| 182 | } |
| 183 | dispatch.DefaultAt(static_cast<int>(deferred_.size())); |
| 184 | for (size_t i = 0; i < deferred_.size(); ++i) { |
| 185 | Entry& entry = deferred_[i]; |
| 186 | dispatch.SetCaseTarget(static_cast<int>(i)); |
| 187 | builder()->LoadAccumulatorWithRegister(result_register_); |
| 188 | execution_control()->PerformCommand(entry.command, entry.statement); |
| 189 | } |
| 190 | dispatch.SetCaseTarget(static_cast<int>(deferred_.size())); |
| 191 | } |
| 192 | |
| 193 | BytecodeArrayBuilder* builder() { return generator_->builder(); } |
| 194 | ControlScope* execution_control() { return generator_->execution_control(); } |
| 195 | |
| 196 | private: |
| 197 | BytecodeGenerator* generator_; |
| 198 | ZoneVector<Entry> deferred_; |
| 199 | Register token_register_; |
| 200 | Register result_register_; |
| 201 | }; |
| 202 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 203 | // Scoped class for dealing with control flow reaching the function level. |
| 204 | class BytecodeGenerator::ControlScopeForTopLevel final |
| 205 | : public BytecodeGenerator::ControlScope { |
| 206 | public: |
| 207 | explicit ControlScopeForTopLevel(BytecodeGenerator* generator) |
| 208 | : ControlScope(generator) {} |
| 209 | |
| 210 | protected: |
| 211 | bool Execute(Command command, Statement* statement) override { |
| 212 | switch (command) { |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 213 | case CMD_BREAK: // We should never see break/continue in top-level. |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 214 | case CMD_CONTINUE: |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 215 | UNREACHABLE(); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 216 | case CMD_RETURN: |
| 217 | generator()->builder()->Return(); |
| 218 | return true; |
| 219 | case CMD_RETHROW: |
| 220 | generator()->builder()->ReThrow(); |
| 221 | return true; |
| 222 | } |
| 223 | return false; |
| 224 | } |
| 225 | }; |
| 226 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 227 | // Scoped class for enabling break inside blocks and switch blocks. |
| 228 | class BytecodeGenerator::ControlScopeForBreakable final |
| 229 | : public BytecodeGenerator::ControlScope { |
| 230 | public: |
| 231 | ControlScopeForBreakable(BytecodeGenerator* generator, |
| 232 | BreakableStatement* statement, |
| 233 | BreakableControlFlowBuilder* control_builder) |
| 234 | : ControlScope(generator), |
| 235 | statement_(statement), |
| 236 | control_builder_(control_builder) {} |
| 237 | |
| 238 | protected: |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 239 | bool Execute(Command command, Statement* statement) override { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 240 | if (statement != statement_) return false; |
| 241 | switch (command) { |
| 242 | case CMD_BREAK: |
| 243 | control_builder_->Break(); |
| 244 | return true; |
| 245 | case CMD_CONTINUE: |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 246 | case CMD_RETURN: |
| 247 | case CMD_RETHROW: |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 248 | break; |
| 249 | } |
| 250 | return false; |
| 251 | } |
| 252 | |
| 253 | private: |
| 254 | Statement* statement_; |
| 255 | BreakableControlFlowBuilder* control_builder_; |
| 256 | }; |
| 257 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 258 | // Scoped class for enabling 'break' and 'continue' in iteration |
| 259 | // constructs, e.g. do...while, while..., for... |
| 260 | class BytecodeGenerator::ControlScopeForIteration final |
| 261 | : public BytecodeGenerator::ControlScope { |
| 262 | public: |
| 263 | ControlScopeForIteration(BytecodeGenerator* generator, |
| 264 | IterationStatement* statement, |
| 265 | LoopBuilder* loop_builder) |
| 266 | : ControlScope(generator), |
| 267 | statement_(statement), |
| 268 | loop_builder_(loop_builder) {} |
| 269 | |
| 270 | protected: |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 271 | bool Execute(Command command, Statement* statement) override { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 272 | if (statement != statement_) return false; |
| 273 | switch (command) { |
| 274 | case CMD_BREAK: |
| 275 | loop_builder_->Break(); |
| 276 | return true; |
| 277 | case CMD_CONTINUE: |
| 278 | loop_builder_->Continue(); |
| 279 | return true; |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 280 | case CMD_RETURN: |
| 281 | case CMD_RETHROW: |
| 282 | break; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 283 | } |
| 284 | return false; |
| 285 | } |
| 286 | |
| 287 | private: |
| 288 | Statement* statement_; |
| 289 | LoopBuilder* loop_builder_; |
| 290 | }; |
| 291 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 292 | // Scoped class for enabling 'throw' in try-catch constructs. |
| 293 | class BytecodeGenerator::ControlScopeForTryCatch final |
| 294 | : public BytecodeGenerator::ControlScope { |
| 295 | public: |
| 296 | ControlScopeForTryCatch(BytecodeGenerator* generator, |
| 297 | TryCatchBuilder* try_catch_builder) |
| 298 | : ControlScope(generator) { |
| 299 | generator->try_catch_nesting_level_++; |
| 300 | } |
| 301 | virtual ~ControlScopeForTryCatch() { |
| 302 | generator()->try_catch_nesting_level_--; |
| 303 | } |
| 304 | |
| 305 | protected: |
| 306 | bool Execute(Command command, Statement* statement) override { |
| 307 | switch (command) { |
| 308 | case CMD_BREAK: |
| 309 | case CMD_CONTINUE: |
| 310 | case CMD_RETURN: |
| 311 | break; |
| 312 | case CMD_RETHROW: |
| 313 | generator()->builder()->ReThrow(); |
| 314 | return true; |
| 315 | } |
| 316 | return false; |
| 317 | } |
| 318 | }; |
| 319 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 320 | // Scoped class for enabling control flow through try-finally constructs. |
| 321 | class BytecodeGenerator::ControlScopeForTryFinally final |
| 322 | : public BytecodeGenerator::ControlScope { |
| 323 | public: |
| 324 | ControlScopeForTryFinally(BytecodeGenerator* generator, |
| 325 | TryFinallyBuilder* try_finally_builder, |
| 326 | DeferredCommands* commands) |
| 327 | : ControlScope(generator), |
| 328 | try_finally_builder_(try_finally_builder), |
| 329 | commands_(commands) { |
| 330 | generator->try_finally_nesting_level_++; |
| 331 | } |
| 332 | virtual ~ControlScopeForTryFinally() { |
| 333 | generator()->try_finally_nesting_level_--; |
| 334 | } |
| 335 | |
| 336 | protected: |
| 337 | bool Execute(Command command, Statement* statement) override { |
| 338 | switch (command) { |
| 339 | case CMD_BREAK: |
| 340 | case CMD_CONTINUE: |
| 341 | case CMD_RETURN: |
| 342 | case CMD_RETHROW: |
| 343 | commands_->RecordCommand(command, statement); |
| 344 | try_finally_builder_->LeaveTry(); |
| 345 | return true; |
| 346 | } |
| 347 | return false; |
| 348 | } |
| 349 | |
| 350 | private: |
| 351 | TryFinallyBuilder* try_finally_builder_; |
| 352 | DeferredCommands* commands_; |
| 353 | }; |
| 354 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 355 | void BytecodeGenerator::ControlScope::PerformCommand(Command command, |
| 356 | Statement* statement) { |
| 357 | ControlScope* current = this; |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 358 | ContextScope* context = generator()->execution_context(); |
| 359 | // Pop context to the expected depth but do not pop the outermost context. |
| 360 | if (context != current->context() && context->ShouldPopContext()) { |
| 361 | generator()->builder()->PopContext(current->context()->reg()); |
| 362 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 363 | do { |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 364 | if (current->Execute(command, statement)) { |
| 365 | return; |
| 366 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 367 | current = current->outer(); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 368 | if (current->context() != context) { |
| 369 | // Pop context to the expected depth. |
| 370 | // TODO(rmcilroy): Only emit a single context pop. |
| 371 | generator()->builder()->PopContext(current->context()->reg()); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 372 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 373 | } while (current != nullptr); |
| 374 | UNREACHABLE(); |
| 375 | } |
| 376 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 377 | class BytecodeGenerator::RegisterAllocationScope { |
| 378 | public: |
| 379 | explicit RegisterAllocationScope(BytecodeGenerator* generator) |
| 380 | : generator_(generator), |
| 381 | outer_(generator->register_allocator()), |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 382 | allocator_(builder()->zone(), |
| 383 | builder()->temporary_register_allocator()) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 384 | generator_->set_register_allocator(this); |
| 385 | } |
| 386 | |
| 387 | virtual ~RegisterAllocationScope() { |
| 388 | generator_->set_register_allocator(outer_); |
| 389 | } |
| 390 | |
| 391 | Register NewRegister() { |
| 392 | RegisterAllocationScope* current_scope = generator()->register_allocator(); |
| 393 | if ((current_scope == this) || |
| 394 | (current_scope->outer() == this && |
| 395 | !current_scope->allocator_.HasConsecutiveAllocations())) { |
| 396 | // Regular case - Allocating registers in current or outer context. |
| 397 | // VisitForRegisterValue allocates register in outer context. |
| 398 | return allocator_.NewRegister(); |
| 399 | } else { |
| 400 | // If it is required to allocate a register other than current or outer |
| 401 | // scopes, allocate a new temporary register. It might be expensive to |
| 402 | // walk the full context chain and compute the list of consecutive |
| 403 | // reservations in the innerscopes. |
| 404 | UNIMPLEMENTED(); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 405 | return Register::invalid_value(); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 406 | } |
| 407 | } |
| 408 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 409 | void PrepareForConsecutiveAllocations(int count) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 410 | allocator_.PrepareForConsecutiveAllocations(count); |
| 411 | } |
| 412 | |
| 413 | Register NextConsecutiveRegister() { |
| 414 | return allocator_.NextConsecutiveRegister(); |
| 415 | } |
| 416 | |
| 417 | bool RegisterIsAllocatedInThisScope(Register reg) const { |
| 418 | return allocator_.RegisterIsAllocatedInThisScope(reg); |
| 419 | } |
| 420 | |
| 421 | RegisterAllocationScope* outer() const { return outer_; } |
| 422 | |
| 423 | private: |
| 424 | BytecodeGenerator* generator() const { return generator_; } |
| 425 | BytecodeArrayBuilder* builder() const { return generator_->builder(); } |
| 426 | |
| 427 | BytecodeGenerator* generator_; |
| 428 | RegisterAllocationScope* outer_; |
| 429 | BytecodeRegisterAllocator allocator_; |
| 430 | |
| 431 | DISALLOW_COPY_AND_ASSIGN(RegisterAllocationScope); |
| 432 | }; |
| 433 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 434 | // Scoped base class for determining where the result of an expression |
| 435 | // is stored. |
| 436 | class BytecodeGenerator::ExpressionResultScope { |
| 437 | public: |
| 438 | ExpressionResultScope(BytecodeGenerator* generator, Expression::Context kind) |
| 439 | : generator_(generator), |
| 440 | kind_(kind), |
| 441 | outer_(generator->execution_result()), |
| 442 | allocator_(generator), |
| 443 | result_identified_(false) { |
| 444 | generator_->set_execution_result(this); |
| 445 | } |
| 446 | |
| 447 | virtual ~ExpressionResultScope() { |
| 448 | generator_->set_execution_result(outer_); |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 449 | DCHECK(result_identified() || generator_->HasStackOverflow()); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 450 | } |
| 451 | |
| 452 | bool IsEffect() const { return kind_ == Expression::kEffect; } |
| 453 | bool IsValue() const { return kind_ == Expression::kValue; } |
| 454 | |
| 455 | virtual void SetResultInAccumulator() = 0; |
| 456 | virtual void SetResultInRegister(Register reg) = 0; |
| 457 | |
| 458 | protected: |
| 459 | ExpressionResultScope* outer() const { return outer_; } |
| 460 | BytecodeArrayBuilder* builder() const { return generator_->builder(); } |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 461 | BytecodeGenerator* generator() const { return generator_; } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 462 | const RegisterAllocationScope* allocator() const { return &allocator_; } |
| 463 | |
| 464 | void set_result_identified() { |
| 465 | DCHECK(!result_identified()); |
| 466 | result_identified_ = true; |
| 467 | } |
| 468 | |
| 469 | bool result_identified() const { return result_identified_; } |
| 470 | |
| 471 | private: |
| 472 | BytecodeGenerator* generator_; |
| 473 | Expression::Context kind_; |
| 474 | ExpressionResultScope* outer_; |
| 475 | RegisterAllocationScope allocator_; |
| 476 | bool result_identified_; |
| 477 | |
| 478 | DISALLOW_COPY_AND_ASSIGN(ExpressionResultScope); |
| 479 | }; |
| 480 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 481 | // Scoped class used when the result of the current expression is not |
| 482 | // expected to produce a result. |
| 483 | class BytecodeGenerator::EffectResultScope final |
| 484 | : public ExpressionResultScope { |
| 485 | public: |
| 486 | explicit EffectResultScope(BytecodeGenerator* generator) |
| 487 | : ExpressionResultScope(generator, Expression::kEffect) { |
| 488 | set_result_identified(); |
| 489 | } |
| 490 | |
| 491 | virtual void SetResultInAccumulator() {} |
| 492 | virtual void SetResultInRegister(Register reg) {} |
| 493 | }; |
| 494 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 495 | // Scoped class used when the result of the current expression to be |
| 496 | // evaluated should go into the interpreter's accumulator register. |
| 497 | class BytecodeGenerator::AccumulatorResultScope final |
| 498 | : public ExpressionResultScope { |
| 499 | public: |
| 500 | explicit AccumulatorResultScope(BytecodeGenerator* generator) |
| 501 | : ExpressionResultScope(generator, Expression::kValue) {} |
| 502 | |
| 503 | virtual void SetResultInAccumulator() { set_result_identified(); } |
| 504 | |
| 505 | virtual void SetResultInRegister(Register reg) { |
| 506 | builder()->LoadAccumulatorWithRegister(reg); |
| 507 | set_result_identified(); |
| 508 | } |
| 509 | }; |
| 510 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 511 | // Scoped class used when the result of the current expression to be |
| 512 | // evaluated should go into an interpreter register. |
| 513 | class BytecodeGenerator::RegisterResultScope final |
| 514 | : public ExpressionResultScope { |
| 515 | public: |
| 516 | explicit RegisterResultScope(BytecodeGenerator* generator) |
| 517 | : ExpressionResultScope(generator, Expression::kValue) {} |
| 518 | |
| 519 | virtual void SetResultInAccumulator() { |
| 520 | result_register_ = allocator()->outer()->NewRegister(); |
| 521 | builder()->StoreAccumulatorInRegister(result_register_); |
| 522 | set_result_identified(); |
| 523 | } |
| 524 | |
| 525 | virtual void SetResultInRegister(Register reg) { |
| 526 | DCHECK(builder()->RegisterIsParameterOrLocal(reg) || |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 527 | (builder()->TemporaryRegisterIsLive(reg) && |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 528 | !allocator()->RegisterIsAllocatedInThisScope(reg))); |
| 529 | result_register_ = reg; |
| 530 | set_result_identified(); |
| 531 | } |
| 532 | |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 533 | Register ResultRegister() { |
| 534 | if (generator()->HasStackOverflow() && !result_identified()) { |
| 535 | SetResultInAccumulator(); |
| 536 | } |
| 537 | return result_register_; |
| 538 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 539 | |
| 540 | private: |
| 541 | Register result_register_; |
| 542 | }; |
| 543 | |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 544 | BytecodeGenerator::BytecodeGenerator(CompilationInfo* info) |
| 545 | : isolate_(info->isolate()), |
| 546 | zone_(info->zone()), |
| 547 | builder_(new (zone()) BytecodeArrayBuilder( |
| 548 | info->isolate(), info->zone(), info->num_parameters_including_this(), |
| 549 | info->scope()->MaxNestedContextChainLength(), |
| 550 | info->scope()->num_stack_slots(), info->literal())), |
| 551 | info_(info), |
| 552 | scope_(info->scope()), |
| 553 | globals_(0, info->zone()), |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 554 | execution_control_(nullptr), |
| 555 | execution_context_(nullptr), |
| 556 | execution_result_(nullptr), |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 557 | register_allocator_(nullptr), |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 558 | generator_resume_points_(info->literal()->yield_count(), info->zone()), |
| 559 | generator_state_(), |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 560 | try_catch_nesting_level_(0), |
| 561 | try_finally_nesting_level_(0) { |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 562 | InitializeAstVisitor(isolate()); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 563 | } |
| 564 | |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 565 | Handle<BytecodeArray> BytecodeGenerator::MakeBytecode() { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 566 | // Initialize the incoming context. |
| 567 | ContextScope incoming_context(this, scope(), false); |
| 568 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 569 | // Initialize control scope. |
| 570 | ControlScopeForTopLevel control(this); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 571 | |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 572 | RegisterAllocationScope register_scope(this); |
| 573 | |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 574 | if (IsResumableFunction(info()->literal()->kind())) { |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 575 | generator_state_ = register_allocator()->NewRegister(); |
| 576 | VisitGeneratorPrologue(); |
| 577 | } |
| 578 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 579 | // Build function context only if there are context allocated variables. |
| 580 | if (scope()->NeedsContext()) { |
| 581 | // Push a new inner context scope for the function. |
| 582 | VisitNewLocalFunctionContext(); |
| 583 | ContextScope local_function_context(this, scope(), false); |
| 584 | VisitBuildLocalActivationContext(); |
| 585 | MakeBytecodeBody(); |
| 586 | } else { |
| 587 | MakeBytecodeBody(); |
| 588 | } |
| 589 | |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 590 | // In generator functions, we may not have visited every yield in the AST |
| 591 | // since we skip some obviously dead code. Hence the generated bytecode may |
| 592 | // contain jumps to unbound labels (resume points that will never be used). |
| 593 | // We bind these now. |
| 594 | for (auto& label : generator_resume_points_) { |
| 595 | if (!label.is_bound()) builder()->Bind(&label); |
| 596 | } |
| 597 | |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 598 | builder()->EnsureReturn(); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 599 | return builder()->ToBytecodeArray(); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 600 | } |
| 601 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 602 | void BytecodeGenerator::MakeBytecodeBody() { |
| 603 | // Build the arguments object if it is used. |
| 604 | VisitArgumentsObject(scope()->arguments()); |
| 605 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 606 | // Build rest arguments array if it is used. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 607 | int rest_index; |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 608 | Variable* rest_parameter = scope()->rest_parameter(&rest_index); |
| 609 | VisitRestArgumentsArray(rest_parameter); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 610 | |
| 611 | // Build assignment to {.this_function} variable if it is used. |
| 612 | VisitThisFunctionVariable(scope()->this_function_var()); |
| 613 | |
| 614 | // Build assignment to {new.target} variable if it is used. |
| 615 | VisitNewTargetVariable(scope()->new_target_var()); |
| 616 | |
| 617 | // TODO(rmcilroy): Emit tracing call if requested to do so. |
| 618 | if (FLAG_trace) { |
| 619 | UNIMPLEMENTED(); |
| 620 | } |
| 621 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 622 | // Visit declarations within the function scope. |
| 623 | VisitDeclarations(scope()->declarations()); |
| 624 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 625 | // Perform a stack-check before the body. |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 626 | builder()->StackCheck(info()->literal()->start_position()); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 627 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 628 | // Visit statements in the function body. |
| 629 | VisitStatements(info()->literal()->body()); |
| 630 | } |
| 631 | |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 632 | void BytecodeGenerator::BuildIndexedJump(Register index, size_t start_index, |
| 633 | size_t size, |
| 634 | ZoneVector<BytecodeLabel>& targets) { |
| 635 | // TODO(neis): Optimize this by using a proper jump table. |
| 636 | for (size_t i = start_index; i < start_index + size; i++) { |
| 637 | DCHECK(0 <= i && i < targets.size()); |
| 638 | builder() |
| 639 | ->LoadLiteral(Smi::FromInt(static_cast<int>(i))) |
| 640 | .CompareOperation(Token::Value::EQ_STRICT, index) |
| 641 | .JumpIfTrue(&(targets[i])); |
| 642 | } |
| 643 | |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 644 | BuildAbort(BailoutReason::kInvalidJumpTableIndex); |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 645 | } |
| 646 | |
| 647 | void BytecodeGenerator::VisitIterationHeader(IterationStatement* stmt, |
| 648 | LoopBuilder* loop_builder) { |
| 649 | // Recall that stmt->yield_count() is always zero inside ordinary |
| 650 | // (i.e. non-generator) functions. |
| 651 | |
| 652 | // Collect all labels for generator resume points within the loop (if any) so |
| 653 | // that they can be bound to the loop header below. Also create fresh labels |
| 654 | // for these resume points, to be used inside the loop. |
| 655 | ZoneVector<BytecodeLabel> resume_points_in_loop(zone()); |
| 656 | size_t first_yield = stmt->first_yield_id(); |
| 657 | for (size_t id = first_yield; id < first_yield + stmt->yield_count(); id++) { |
| 658 | DCHECK(0 <= id && id < generator_resume_points_.size()); |
| 659 | auto& label = generator_resume_points_[id]; |
| 660 | resume_points_in_loop.push_back(label); |
| 661 | generator_resume_points_[id] = BytecodeLabel(); |
| 662 | } |
| 663 | |
| 664 | loop_builder->LoopHeader(&resume_points_in_loop); |
| 665 | |
| 666 | if (stmt->yield_count() > 0) { |
| 667 | // If we are not resuming, fall through to loop body. |
| 668 | // If we are resuming, perform state dispatch. |
| 669 | BytecodeLabel not_resuming; |
| 670 | builder() |
| 671 | ->LoadLiteral(Smi::FromInt(JSGeneratorObject::kGeneratorExecuting)) |
| 672 | .CompareOperation(Token::Value::EQ, generator_state_) |
| 673 | .JumpIfTrue(¬_resuming); |
| 674 | BuildIndexedJump(generator_state_, first_yield, |
| 675 | stmt->yield_count(), generator_resume_points_); |
| 676 | builder()->Bind(¬_resuming); |
| 677 | } |
| 678 | } |
| 679 | |
| 680 | void BytecodeGenerator::VisitGeneratorPrologue() { |
| 681 | // The generator resume trampoline abuses the new.target register both to |
| 682 | // indicate that this is a resume call and to pass in the generator object. |
| 683 | // In ordinary calls, new.target is always undefined because generator |
| 684 | // functions are non-constructable. |
| 685 | Register generator_object = Register::new_target(); |
| 686 | BytecodeLabel regular_call; |
| 687 | builder() |
| 688 | ->LoadAccumulatorWithRegister(generator_object) |
| 689 | .JumpIfUndefined(®ular_call); |
| 690 | |
| 691 | // This is a resume call. Restore registers and perform state dispatch. |
| 692 | // (The current context has already been restored by the trampoline.) |
| 693 | builder() |
| 694 | ->ResumeGenerator(generator_object) |
| 695 | .StoreAccumulatorInRegister(generator_state_); |
| 696 | BuildIndexedJump(generator_state_, 0, generator_resume_points_.size(), |
| 697 | generator_resume_points_); |
| 698 | |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 699 | builder() |
| 700 | ->Bind(®ular_call) |
| 701 | .LoadLiteral(Smi::FromInt(JSGeneratorObject::kGeneratorExecuting)) |
| 702 | .StoreAccumulatorInRegister(generator_state_); |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 703 | // This is a regular call. Fall through to the ordinary function prologue, |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 704 | // after which we will run into the generator object creation and other extra |
| 705 | // code inserted by the parser. |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 706 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 707 | |
| 708 | void BytecodeGenerator::VisitBlock(Block* stmt) { |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 709 | // Visit declarations and statements. |
| 710 | if (stmt->scope() != nullptr && stmt->scope()->NeedsContext()) { |
| 711 | VisitNewLocalBlockContext(stmt->scope()); |
| 712 | ContextScope scope(this, stmt->scope()); |
| 713 | VisitBlockDeclarationsAndStatements(stmt); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 714 | } else { |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 715 | VisitBlockDeclarationsAndStatements(stmt); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 716 | } |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 717 | } |
| 718 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 719 | void BytecodeGenerator::VisitBlockDeclarationsAndStatements(Block* stmt) { |
| 720 | BlockBuilder block_builder(builder()); |
| 721 | ControlScopeForBreakable execution_control(this, stmt, &block_builder); |
| 722 | if (stmt->scope() != nullptr) { |
| 723 | VisitDeclarations(stmt->scope()->declarations()); |
| 724 | } |
| 725 | VisitStatements(stmt->statements()); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 726 | if (stmt->labels() != nullptr) block_builder.EndBlock(); |
| 727 | } |
| 728 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 729 | void BytecodeGenerator::VisitVariableDeclaration(VariableDeclaration* decl) { |
| 730 | Variable* variable = decl->proxy()->var(); |
| 731 | VariableMode mode = decl->mode(); |
| 732 | // Const and let variables are initialized with the hole so that we can |
| 733 | // check that they are only assigned once. |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 734 | bool hole_init = mode == CONST || mode == LET; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 735 | switch (variable->location()) { |
| 736 | case VariableLocation::GLOBAL: |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 737 | case VariableLocation::UNALLOCATED: |
| 738 | DCHECK(!variable->binding_needs_init()); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 739 | globals()->push_back(variable->name()); |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 740 | globals()->push_back(isolate()->factory()->undefined_value()); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 741 | break; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 742 | case VariableLocation::LOCAL: |
| 743 | if (hole_init) { |
| 744 | Register destination(variable->index()); |
| 745 | builder()->LoadTheHole().StoreAccumulatorInRegister(destination); |
| 746 | } |
| 747 | break; |
| 748 | case VariableLocation::PARAMETER: |
| 749 | if (hole_init) { |
| 750 | // The parameter indices are shifted by 1 (receiver is variable |
| 751 | // index -1 but is parameter index 0 in BytecodeArrayBuilder). |
| 752 | Register destination(builder()->Parameter(variable->index() + 1)); |
| 753 | builder()->LoadTheHole().StoreAccumulatorInRegister(destination); |
| 754 | } |
| 755 | break; |
| 756 | case VariableLocation::CONTEXT: |
| 757 | if (hole_init) { |
| 758 | builder()->LoadTheHole().StoreContextSlot(execution_context()->reg(), |
| 759 | variable->index()); |
| 760 | } |
| 761 | break; |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 762 | case VariableLocation::LOOKUP: { |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 763 | DCHECK_EQ(VAR, mode); |
| 764 | DCHECK(!hole_init); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 765 | |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 766 | Register name = register_allocator()->NewRegister(); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 767 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 768 | builder() |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 769 | ->LoadLiteral(variable->name()) |
| 770 | .StoreAccumulatorInRegister(name) |
| 771 | .CallRuntime(Runtime::kDeclareEvalVar, name, 1); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 772 | break; |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 773 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 774 | } |
| 775 | } |
| 776 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 777 | void BytecodeGenerator::VisitFunctionDeclaration(FunctionDeclaration* decl) { |
| 778 | Variable* variable = decl->proxy()->var(); |
| 779 | switch (variable->location()) { |
| 780 | case VariableLocation::GLOBAL: |
| 781 | case VariableLocation::UNALLOCATED: { |
| 782 | Handle<SharedFunctionInfo> function = Compiler::GetSharedFunctionInfo( |
| 783 | decl->fun(), info()->script(), info()); |
| 784 | // Check for stack-overflow exception. |
| 785 | if (function.is_null()) return SetStackOverflow(); |
| 786 | globals()->push_back(variable->name()); |
| 787 | globals()->push_back(function); |
| 788 | break; |
| 789 | } |
| 790 | case VariableLocation::PARAMETER: |
| 791 | case VariableLocation::LOCAL: { |
| 792 | VisitForAccumulatorValue(decl->fun()); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 793 | DCHECK(variable->mode() == LET || variable->mode() == VAR || |
| 794 | variable->mode() == CONST); |
| 795 | VisitVariableAssignment(variable, Token::INIT, |
| 796 | FeedbackVectorSlot::Invalid()); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 797 | break; |
| 798 | } |
| 799 | case VariableLocation::CONTEXT: { |
| 800 | DCHECK_EQ(0, execution_context()->ContextChainDepth(variable->scope())); |
| 801 | VisitForAccumulatorValue(decl->fun()); |
| 802 | builder()->StoreContextSlot(execution_context()->reg(), |
| 803 | variable->index()); |
| 804 | break; |
| 805 | } |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 806 | case VariableLocation::LOOKUP: { |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 807 | register_allocator()->PrepareForConsecutiveAllocations(2); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 808 | Register name = register_allocator()->NextConsecutiveRegister(); |
| 809 | Register literal = register_allocator()->NextConsecutiveRegister(); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 810 | builder()->LoadLiteral(variable->name()).StoreAccumulatorInRegister(name); |
| 811 | |
| 812 | VisitForAccumulatorValue(decl->fun()); |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 813 | builder()->StoreAccumulatorInRegister(literal).CallRuntime( |
| 814 | Runtime::kDeclareEvalFunction, name, 2); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 815 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 816 | } |
| 817 | } |
| 818 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 819 | void BytecodeGenerator::VisitImportDeclaration(ImportDeclaration* decl) { |
| 820 | UNIMPLEMENTED(); |
| 821 | } |
| 822 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 823 | void BytecodeGenerator::VisitExportDeclaration(ExportDeclaration* decl) { |
| 824 | UNIMPLEMENTED(); |
| 825 | } |
| 826 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 827 | void BytecodeGenerator::VisitDeclarations( |
| 828 | ZoneList<Declaration*>* declarations) { |
| 829 | RegisterAllocationScope register_scope(this); |
| 830 | DCHECK(globals()->empty()); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 831 | for (int i = 0; i < declarations->length(); i++) { |
| 832 | RegisterAllocationScope register_scope(this); |
| 833 | Visit(declarations->at(i)); |
| 834 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 835 | if (globals()->empty()) return; |
| 836 | int array_index = 0; |
| 837 | Handle<FixedArray> data = isolate()->factory()->NewFixedArray( |
| 838 | static_cast<int>(globals()->size()), TENURED); |
| 839 | for (Handle<Object> obj : *globals()) data->set(array_index++, *obj); |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 840 | int encoded_flags = info()->GetDeclareGlobalsFlags(); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 841 | |
| 842 | Register pairs = register_allocator()->NewRegister(); |
| 843 | builder()->LoadLiteral(data); |
| 844 | builder()->StoreAccumulatorInRegister(pairs); |
| 845 | |
| 846 | Register flags = register_allocator()->NewRegister(); |
| 847 | builder()->LoadLiteral(Smi::FromInt(encoded_flags)); |
| 848 | builder()->StoreAccumulatorInRegister(flags); |
| 849 | DCHECK(flags.index() == pairs.index() + 1); |
| 850 | |
| 851 | builder()->CallRuntime(Runtime::kDeclareGlobals, pairs, 2); |
| 852 | globals()->clear(); |
| 853 | } |
| 854 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 855 | void BytecodeGenerator::VisitStatements(ZoneList<Statement*>* statements) { |
| 856 | for (int i = 0; i < statements->length(); i++) { |
| 857 | // Allocate an outer register allocations scope for the statement. |
| 858 | RegisterAllocationScope allocation_scope(this); |
| 859 | Statement* stmt = statements->at(i); |
| 860 | Visit(stmt); |
| 861 | if (stmt->IsJump()) break; |
| 862 | } |
| 863 | } |
| 864 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 865 | void BytecodeGenerator::VisitExpressionStatement(ExpressionStatement* stmt) { |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 866 | builder()->SetStatementPosition(stmt); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 867 | VisitForEffect(stmt->expression()); |
| 868 | } |
| 869 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 870 | void BytecodeGenerator::VisitEmptyStatement(EmptyStatement* stmt) { |
| 871 | } |
| 872 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 873 | void BytecodeGenerator::VisitIfStatement(IfStatement* stmt) { |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 874 | builder()->SetStatementPosition(stmt); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 875 | BytecodeLabel else_label, end_label; |
| 876 | if (stmt->condition()->ToBooleanIsTrue()) { |
| 877 | // Generate then block unconditionally as always true. |
| 878 | Visit(stmt->then_statement()); |
| 879 | } else if (stmt->condition()->ToBooleanIsFalse()) { |
| 880 | // Generate else block unconditionally if it exists. |
| 881 | if (stmt->HasElseStatement()) { |
| 882 | Visit(stmt->else_statement()); |
| 883 | } |
| 884 | } else { |
| 885 | // TODO(oth): If then statement is BreakStatement or |
| 886 | // ContinueStatement we can reduce number of generated |
| 887 | // jump/jump_ifs here. See BasicLoops test. |
| 888 | VisitForAccumulatorValue(stmt->condition()); |
| 889 | builder()->JumpIfFalse(&else_label); |
| 890 | Visit(stmt->then_statement()); |
| 891 | if (stmt->HasElseStatement()) { |
| 892 | builder()->Jump(&end_label); |
| 893 | builder()->Bind(&else_label); |
| 894 | Visit(stmt->else_statement()); |
| 895 | } else { |
| 896 | builder()->Bind(&else_label); |
| 897 | } |
| 898 | builder()->Bind(&end_label); |
| 899 | } |
| 900 | } |
| 901 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 902 | void BytecodeGenerator::VisitSloppyBlockFunctionStatement( |
| 903 | SloppyBlockFunctionStatement* stmt) { |
| 904 | Visit(stmt->statement()); |
| 905 | } |
| 906 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 907 | void BytecodeGenerator::VisitContinueStatement(ContinueStatement* stmt) { |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 908 | builder()->SetStatementPosition(stmt); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 909 | execution_control()->Continue(stmt->target()); |
| 910 | } |
| 911 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 912 | void BytecodeGenerator::VisitBreakStatement(BreakStatement* stmt) { |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 913 | builder()->SetStatementPosition(stmt); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 914 | execution_control()->Break(stmt->target()); |
| 915 | } |
| 916 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 917 | void BytecodeGenerator::VisitReturnStatement(ReturnStatement* stmt) { |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 918 | builder()->SetStatementPosition(stmt); |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 919 | VisitForAccumulatorValue(stmt->expression()); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 920 | execution_control()->ReturnAccumulator(); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 921 | } |
| 922 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 923 | void BytecodeGenerator::VisitWithStatement(WithStatement* stmt) { |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 924 | builder()->SetStatementPosition(stmt); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 925 | VisitForAccumulatorValue(stmt->expression()); |
| 926 | builder()->CastAccumulatorToJSObject(); |
| 927 | VisitNewLocalWithContext(); |
| 928 | VisitInScope(stmt->statement(), stmt->scope()); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 929 | } |
| 930 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 931 | void BytecodeGenerator::VisitSwitchStatement(SwitchStatement* stmt) { |
| 932 | // We need this scope because we visit for register values. We have to |
| 933 | // maintain a execution result scope where registers can be allocated. |
| 934 | ZoneList<CaseClause*>* clauses = stmt->cases(); |
| 935 | SwitchBuilder switch_builder(builder(), clauses->length()); |
| 936 | ControlScopeForBreakable scope(this, stmt, &switch_builder); |
| 937 | int default_index = -1; |
| 938 | |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 939 | builder()->SetStatementPosition(stmt); |
| 940 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 941 | // Keep the switch value in a register until a case matches. |
| 942 | Register tag = VisitForRegisterValue(stmt->tag()); |
| 943 | |
| 944 | // Iterate over all cases and create nodes for label comparison. |
| 945 | BytecodeLabel done_label; |
| 946 | for (int i = 0; i < clauses->length(); i++) { |
| 947 | CaseClause* clause = clauses->at(i); |
| 948 | |
| 949 | // The default is not a test, remember index. |
| 950 | if (clause->is_default()) { |
| 951 | default_index = i; |
| 952 | continue; |
| 953 | } |
| 954 | |
| 955 | // Perform label comparison as if via '===' with tag. |
| 956 | VisitForAccumulatorValue(clause->label()); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 957 | builder()->CompareOperation(Token::Value::EQ_STRICT, tag); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 958 | switch_builder.Case(i); |
| 959 | } |
| 960 | |
| 961 | if (default_index >= 0) { |
| 962 | // Emit default jump if there is a default case. |
| 963 | switch_builder.DefaultAt(default_index); |
| 964 | } else { |
| 965 | // Otherwise if we have reached here none of the cases matched, so jump to |
| 966 | // done. |
| 967 | builder()->Jump(&done_label); |
| 968 | } |
| 969 | |
| 970 | // Iterate over all cases and create the case bodies. |
| 971 | for (int i = 0; i < clauses->length(); i++) { |
| 972 | CaseClause* clause = clauses->at(i); |
| 973 | switch_builder.SetCaseTarget(i); |
| 974 | VisitStatements(clause->statements()); |
| 975 | } |
| 976 | builder()->Bind(&done_label); |
| 977 | |
| 978 | switch_builder.SetBreakTarget(done_label); |
| 979 | } |
| 980 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 981 | void BytecodeGenerator::VisitCaseClause(CaseClause* clause) { |
| 982 | // Handled entirely in VisitSwitchStatement. |
| 983 | UNREACHABLE(); |
| 984 | } |
| 985 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 986 | void BytecodeGenerator::VisitIterationBody(IterationStatement* stmt, |
| 987 | LoopBuilder* loop_builder) { |
| 988 | ControlScopeForIteration execution_control(this, stmt, loop_builder); |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 989 | builder()->StackCheck(stmt->position()); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 990 | Visit(stmt->body()); |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 991 | loop_builder->SetContinueTarget(); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 992 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 993 | |
| 994 | void BytecodeGenerator::VisitDoWhileStatement(DoWhileStatement* stmt) { |
| 995 | LoopBuilder loop_builder(builder()); |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 996 | VisitIterationHeader(stmt, &loop_builder); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 997 | if (stmt->cond()->ToBooleanIsFalse()) { |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 998 | VisitIterationBody(stmt, &loop_builder); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 999 | } else if (stmt->cond()->ToBooleanIsTrue()) { |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1000 | VisitIterationBody(stmt, &loop_builder); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1001 | loop_builder.JumpToHeader(); |
| 1002 | } else { |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1003 | VisitIterationBody(stmt, &loop_builder); |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 1004 | builder()->SetExpressionAsStatementPosition(stmt->cond()); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1005 | VisitForAccumulatorValue(stmt->cond()); |
| 1006 | loop_builder.JumpToHeaderIfTrue(); |
| 1007 | } |
| 1008 | loop_builder.EndLoop(); |
| 1009 | } |
| 1010 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1011 | void BytecodeGenerator::VisitWhileStatement(WhileStatement* stmt) { |
| 1012 | if (stmt->cond()->ToBooleanIsFalse()) { |
| 1013 | // If the condition is false there is no need to generate the loop. |
| 1014 | return; |
| 1015 | } |
| 1016 | |
| 1017 | LoopBuilder loop_builder(builder()); |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 1018 | VisitIterationHeader(stmt, &loop_builder); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1019 | if (!stmt->cond()->ToBooleanIsTrue()) { |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 1020 | builder()->SetExpressionAsStatementPosition(stmt->cond()); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1021 | VisitForAccumulatorValue(stmt->cond()); |
| 1022 | loop_builder.BreakIfFalse(); |
| 1023 | } |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1024 | VisitIterationBody(stmt, &loop_builder); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1025 | loop_builder.JumpToHeader(); |
| 1026 | loop_builder.EndLoop(); |
| 1027 | } |
| 1028 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1029 | void BytecodeGenerator::VisitForStatement(ForStatement* stmt) { |
| 1030 | if (stmt->init() != nullptr) { |
| 1031 | Visit(stmt->init()); |
| 1032 | } |
| 1033 | if (stmt->cond() && stmt->cond()->ToBooleanIsFalse()) { |
| 1034 | // If the condition is known to be false there is no need to generate |
| 1035 | // body, next or condition blocks. Init block should be generated. |
| 1036 | return; |
| 1037 | } |
| 1038 | |
| 1039 | LoopBuilder loop_builder(builder()); |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 1040 | VisitIterationHeader(stmt, &loop_builder); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1041 | if (stmt->cond() && !stmt->cond()->ToBooleanIsTrue()) { |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 1042 | builder()->SetExpressionAsStatementPosition(stmt->cond()); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1043 | VisitForAccumulatorValue(stmt->cond()); |
| 1044 | loop_builder.BreakIfFalse(); |
| 1045 | } |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1046 | VisitIterationBody(stmt, &loop_builder); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1047 | if (stmt->next() != nullptr) { |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 1048 | builder()->SetStatementPosition(stmt->next()); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1049 | Visit(stmt->next()); |
| 1050 | } |
| 1051 | loop_builder.JumpToHeader(); |
| 1052 | loop_builder.EndLoop(); |
| 1053 | } |
| 1054 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1055 | void BytecodeGenerator::VisitForInAssignment(Expression* expr, |
| 1056 | FeedbackVectorSlot slot) { |
| 1057 | DCHECK(expr->IsValidReferenceExpression()); |
| 1058 | |
| 1059 | // Evaluate assignment starting with the value to be stored in the |
| 1060 | // accumulator. |
| 1061 | Property* property = expr->AsProperty(); |
| 1062 | LhsKind assign_type = Property::GetAssignType(property); |
| 1063 | switch (assign_type) { |
| 1064 | case VARIABLE: { |
| 1065 | Variable* variable = expr->AsVariableProxy()->var(); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1066 | VisitVariableAssignment(variable, Token::ASSIGN, slot); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1067 | break; |
| 1068 | } |
| 1069 | case NAMED_PROPERTY: { |
| 1070 | RegisterAllocationScope register_scope(this); |
| 1071 | Register value = register_allocator()->NewRegister(); |
| 1072 | builder()->StoreAccumulatorInRegister(value); |
| 1073 | Register object = VisitForRegisterValue(property->obj()); |
| 1074 | Handle<String> name = property->key()->AsLiteral()->AsPropertyName(); |
| 1075 | builder()->LoadAccumulatorWithRegister(value); |
| 1076 | builder()->StoreNamedProperty(object, name, feedback_index(slot), |
| 1077 | language_mode()); |
| 1078 | break; |
| 1079 | } |
| 1080 | case KEYED_PROPERTY: { |
| 1081 | RegisterAllocationScope register_scope(this); |
| 1082 | Register value = register_allocator()->NewRegister(); |
| 1083 | builder()->StoreAccumulatorInRegister(value); |
| 1084 | Register object = VisitForRegisterValue(property->obj()); |
| 1085 | Register key = VisitForRegisterValue(property->key()); |
| 1086 | builder()->LoadAccumulatorWithRegister(value); |
| 1087 | builder()->StoreKeyedProperty(object, key, feedback_index(slot), |
| 1088 | language_mode()); |
| 1089 | break; |
| 1090 | } |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1091 | case NAMED_SUPER_PROPERTY: { |
| 1092 | RegisterAllocationScope register_scope(this); |
| 1093 | register_allocator()->PrepareForConsecutiveAllocations(4); |
| 1094 | Register receiver = register_allocator()->NextConsecutiveRegister(); |
| 1095 | Register home_object = register_allocator()->NextConsecutiveRegister(); |
| 1096 | Register name = register_allocator()->NextConsecutiveRegister(); |
| 1097 | Register value = register_allocator()->NextConsecutiveRegister(); |
| 1098 | builder()->StoreAccumulatorInRegister(value); |
| 1099 | SuperPropertyReference* super_property = |
| 1100 | property->obj()->AsSuperPropertyReference(); |
| 1101 | VisitForRegisterValue(super_property->this_var(), receiver); |
| 1102 | VisitForRegisterValue(super_property->home_object(), home_object); |
| 1103 | builder() |
| 1104 | ->LoadLiteral(property->key()->AsLiteral()->AsPropertyName()) |
| 1105 | .StoreAccumulatorInRegister(name); |
| 1106 | BuildNamedSuperPropertyStore(receiver, home_object, name, value); |
| 1107 | break; |
| 1108 | } |
| 1109 | case KEYED_SUPER_PROPERTY: { |
| 1110 | RegisterAllocationScope register_scope(this); |
| 1111 | register_allocator()->PrepareForConsecutiveAllocations(4); |
| 1112 | Register receiver = register_allocator()->NextConsecutiveRegister(); |
| 1113 | Register home_object = register_allocator()->NextConsecutiveRegister(); |
| 1114 | Register key = register_allocator()->NextConsecutiveRegister(); |
| 1115 | Register value = register_allocator()->NextConsecutiveRegister(); |
| 1116 | builder()->StoreAccumulatorInRegister(value); |
| 1117 | SuperPropertyReference* super_property = |
| 1118 | property->obj()->AsSuperPropertyReference(); |
| 1119 | VisitForRegisterValue(super_property->this_var(), receiver); |
| 1120 | VisitForRegisterValue(super_property->home_object(), home_object); |
| 1121 | VisitForRegisterValue(property->key(), key); |
| 1122 | BuildKeyedSuperPropertyStore(receiver, home_object, key, value); |
| 1123 | break; |
| 1124 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1125 | } |
| 1126 | } |
| 1127 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1128 | void BytecodeGenerator::VisitForInStatement(ForInStatement* stmt) { |
| 1129 | if (stmt->subject()->IsNullLiteral() || |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 1130 | stmt->subject()->IsUndefinedLiteral()) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1131 | // ForIn generates lots of code, skip if it wouldn't produce any effects. |
| 1132 | return; |
| 1133 | } |
| 1134 | |
| 1135 | LoopBuilder loop_builder(builder()); |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 1136 | BytecodeLabel subject_null_label, subject_undefined_label; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1137 | |
| 1138 | // Prepare the state for executing ForIn. |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 1139 | builder()->SetExpressionAsStatementPosition(stmt->subject()); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1140 | VisitForAccumulatorValue(stmt->subject()); |
| 1141 | builder()->JumpIfUndefined(&subject_undefined_label); |
| 1142 | builder()->JumpIfNull(&subject_null_label); |
| 1143 | Register receiver = register_allocator()->NewRegister(); |
| 1144 | builder()->CastAccumulatorToJSObject(); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1145 | builder()->StoreAccumulatorInRegister(receiver); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1146 | |
| 1147 | register_allocator()->PrepareForConsecutiveAllocations(3); |
| 1148 | Register cache_type = register_allocator()->NextConsecutiveRegister(); |
| 1149 | Register cache_array = register_allocator()->NextConsecutiveRegister(); |
| 1150 | Register cache_length = register_allocator()->NextConsecutiveRegister(); |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 1151 | // Used as kRegTriple and kRegPair in ForInPrepare and ForInNext. |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1152 | USE(cache_array); |
| 1153 | builder()->ForInPrepare(cache_type); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1154 | |
| 1155 | // Set up loop counter |
| 1156 | Register index = register_allocator()->NewRegister(); |
| 1157 | builder()->LoadLiteral(Smi::FromInt(0)); |
| 1158 | builder()->StoreAccumulatorInRegister(index); |
| 1159 | |
| 1160 | // The loop |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 1161 | VisitIterationHeader(stmt, &loop_builder); |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 1162 | builder()->SetExpressionAsStatementPosition(stmt->each()); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1163 | builder()->ForInDone(index, cache_length); |
| 1164 | loop_builder.BreakIfTrue(); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1165 | DCHECK(Register::AreContiguous(cache_type, cache_array)); |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 1166 | FeedbackVectorSlot slot = stmt->ForInFeedbackSlot(); |
| 1167 | builder()->ForInNext(receiver, index, cache_type, feedback_index(slot)); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1168 | loop_builder.ContinueIfUndefined(); |
| 1169 | VisitForInAssignment(stmt->each(), stmt->EachFeedbackSlot()); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1170 | VisitIterationBody(stmt, &loop_builder); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1171 | builder()->ForInStep(index); |
| 1172 | builder()->StoreAccumulatorInRegister(index); |
| 1173 | loop_builder.JumpToHeader(); |
| 1174 | loop_builder.EndLoop(); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1175 | builder()->Bind(&subject_null_label); |
| 1176 | builder()->Bind(&subject_undefined_label); |
| 1177 | } |
| 1178 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1179 | void BytecodeGenerator::VisitForOfStatement(ForOfStatement* stmt) { |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1180 | LoopBuilder loop_builder(builder()); |
| 1181 | ControlScopeForIteration control_scope(this, stmt, &loop_builder); |
| 1182 | |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 1183 | builder()->SetExpressionAsStatementPosition(stmt->assign_iterator()); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1184 | VisitForEffect(stmt->assign_iterator()); |
| 1185 | |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 1186 | VisitIterationHeader(stmt, &loop_builder); |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 1187 | builder()->SetExpressionAsStatementPosition(stmt->next_result()); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1188 | VisitForEffect(stmt->next_result()); |
| 1189 | VisitForAccumulatorValue(stmt->result_done()); |
| 1190 | loop_builder.BreakIfTrue(); |
| 1191 | |
| 1192 | VisitForEffect(stmt->assign_each()); |
| 1193 | VisitIterationBody(stmt, &loop_builder); |
| 1194 | loop_builder.JumpToHeader(); |
| 1195 | loop_builder.EndLoop(); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1196 | } |
| 1197 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1198 | void BytecodeGenerator::VisitTryCatchStatement(TryCatchStatement* stmt) { |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1199 | TryCatchBuilder try_control_builder(builder()); |
| 1200 | Register no_reg; |
| 1201 | |
| 1202 | // Preserve the context in a dedicated register, so that it can be restored |
| 1203 | // when the handler is entered by the stack-unwinding machinery. |
| 1204 | // TODO(mstarzinger): Be smarter about register allocation. |
| 1205 | Register context = register_allocator()->NewRegister(); |
| 1206 | builder()->MoveRegister(Register::current_context(), context); |
| 1207 | |
| 1208 | // Evaluate the try-block inside a control scope. This simulates a handler |
| 1209 | // that is intercepting 'throw' control commands. |
| 1210 | try_control_builder.BeginTry(context); |
| 1211 | { |
| 1212 | ControlScopeForTryCatch scope(this, &try_control_builder); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1213 | Visit(stmt->try_block()); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1214 | } |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1215 | try_control_builder.EndTry(); |
| 1216 | |
| 1217 | // Create a catch scope that binds the exception. |
| 1218 | VisitNewLocalCatchContext(stmt->variable()); |
| 1219 | builder()->StoreAccumulatorInRegister(context); |
| 1220 | |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 1221 | // If requested, clear message object as we enter the catch block. |
| 1222 | if (stmt->clear_pending_message()) { |
| 1223 | builder()->CallRuntime(Runtime::kInterpreterClearPendingMessage, no_reg, 0); |
| 1224 | } |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1225 | |
| 1226 | // Load the catch context into the accumulator. |
| 1227 | builder()->LoadAccumulatorWithRegister(context); |
| 1228 | |
| 1229 | // Evaluate the catch-block. |
| 1230 | VisitInScope(stmt->catch_block(), stmt->scope()); |
| 1231 | try_control_builder.EndCatch(); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1232 | } |
| 1233 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1234 | void BytecodeGenerator::VisitTryFinallyStatement(TryFinallyStatement* stmt) { |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1235 | TryFinallyBuilder try_control_builder(builder(), IsInsideTryCatch()); |
| 1236 | Register no_reg; |
| 1237 | |
| 1238 | // We keep a record of all paths that enter the finally-block to be able to |
| 1239 | // dispatch to the correct continuation point after the statements in the |
| 1240 | // finally-block have been evaluated. |
| 1241 | // |
| 1242 | // The try-finally construct can enter the finally-block in three ways: |
| 1243 | // 1. By exiting the try-block normally, falling through at the end. |
| 1244 | // 2. By exiting the try-block with a function-local control flow transfer |
| 1245 | // (i.e. through break/continue/return statements). |
| 1246 | // 3. By exiting the try-block with a thrown exception. |
| 1247 | // |
| 1248 | // The result register semantics depend on how the block was entered: |
| 1249 | // - ReturnStatement: It represents the return value being returned. |
| 1250 | // - ThrowStatement: It represents the exception being thrown. |
| 1251 | // - BreakStatement/ContinueStatement: Undefined and not used. |
| 1252 | // - Falling through into finally-block: Undefined and not used. |
| 1253 | Register token = register_allocator()->NewRegister(); |
| 1254 | Register result = register_allocator()->NewRegister(); |
| 1255 | ControlScope::DeferredCommands commands(this, token, result); |
| 1256 | |
| 1257 | // Preserve the context in a dedicated register, so that it can be restored |
| 1258 | // when the handler is entered by the stack-unwinding machinery. |
| 1259 | // TODO(mstarzinger): Be smarter about register allocation. |
| 1260 | Register context = register_allocator()->NewRegister(); |
| 1261 | builder()->MoveRegister(Register::current_context(), context); |
| 1262 | |
| 1263 | // Evaluate the try-block inside a control scope. This simulates a handler |
| 1264 | // that is intercepting all control commands. |
| 1265 | try_control_builder.BeginTry(context); |
| 1266 | { |
| 1267 | ControlScopeForTryFinally scope(this, &try_control_builder, &commands); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1268 | Visit(stmt->try_block()); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1269 | } |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1270 | try_control_builder.EndTry(); |
| 1271 | |
| 1272 | // Record fall-through and exception cases. |
| 1273 | commands.RecordFallThroughPath(); |
| 1274 | try_control_builder.LeaveTry(); |
| 1275 | try_control_builder.BeginHandler(); |
| 1276 | commands.RecordHandlerReThrowPath(); |
| 1277 | |
| 1278 | // Pending message object is saved on entry. |
| 1279 | try_control_builder.BeginFinally(); |
| 1280 | Register message = context; // Reuse register. |
| 1281 | |
| 1282 | // Clear message object as we enter the finally block. |
| 1283 | builder() |
| 1284 | ->CallRuntime(Runtime::kInterpreterClearPendingMessage, no_reg, 0) |
| 1285 | .StoreAccumulatorInRegister(message); |
| 1286 | |
| 1287 | // Evaluate the finally-block. |
| 1288 | Visit(stmt->finally_block()); |
| 1289 | try_control_builder.EndFinally(); |
| 1290 | |
| 1291 | // Pending message object is restored on exit. |
| 1292 | builder()->CallRuntime(Runtime::kInterpreterSetPendingMessage, message, 1); |
| 1293 | |
| 1294 | // Dynamic dispatch after the finally-block. |
| 1295 | commands.ApplyDeferredCommands(); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1296 | } |
| 1297 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1298 | void BytecodeGenerator::VisitDebuggerStatement(DebuggerStatement* stmt) { |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1299 | builder()->SetStatementPosition(stmt); |
| 1300 | builder()->Debugger(); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1301 | } |
| 1302 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1303 | void BytecodeGenerator::VisitFunctionLiteral(FunctionLiteral* expr) { |
| 1304 | // Find or build a shared function info. |
| 1305 | Handle<SharedFunctionInfo> shared_info = |
| 1306 | Compiler::GetSharedFunctionInfo(expr, info()->script(), info()); |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 1307 | if (shared_info.is_null()) { |
| 1308 | return SetStackOverflow(); |
| 1309 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1310 | builder()->CreateClosure(shared_info, |
| 1311 | expr->pretenure() ? TENURED : NOT_TENURED); |
| 1312 | execution_result()->SetResultInAccumulator(); |
| 1313 | } |
| 1314 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1315 | void BytecodeGenerator::VisitClassLiteral(ClassLiteral* expr) { |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1316 | if (expr->scope()->ContextLocalCount() > 0) { |
| 1317 | VisitNewLocalBlockContext(expr->scope()); |
| 1318 | ContextScope scope(this, expr->scope()); |
| 1319 | VisitDeclarations(expr->scope()->declarations()); |
| 1320 | VisitClassLiteralContents(expr); |
| 1321 | } else { |
| 1322 | VisitDeclarations(expr->scope()->declarations()); |
| 1323 | VisitClassLiteralContents(expr); |
| 1324 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1325 | } |
| 1326 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1327 | void BytecodeGenerator::VisitClassLiteralContents(ClassLiteral* expr) { |
| 1328 | VisitClassLiteralForRuntimeDefinition(expr); |
| 1329 | |
| 1330 | // Load the "prototype" from the constructor. |
| 1331 | register_allocator()->PrepareForConsecutiveAllocations(2); |
| 1332 | Register literal = register_allocator()->NextConsecutiveRegister(); |
| 1333 | Register prototype = register_allocator()->NextConsecutiveRegister(); |
| 1334 | Handle<String> name = isolate()->factory()->prototype_string(); |
| 1335 | FeedbackVectorSlot slot = expr->PrototypeSlot(); |
| 1336 | builder() |
| 1337 | ->StoreAccumulatorInRegister(literal) |
| 1338 | .LoadNamedProperty(literal, name, feedback_index(slot)) |
| 1339 | .StoreAccumulatorInRegister(prototype); |
| 1340 | |
| 1341 | VisitClassLiteralProperties(expr, literal, prototype); |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 1342 | builder()->CallRuntime(Runtime::kToFastProperties, literal, 1); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1343 | // Assign to class variable. |
| 1344 | if (expr->class_variable_proxy() != nullptr) { |
| 1345 | Variable* var = expr->class_variable_proxy()->var(); |
| 1346 | FeedbackVectorSlot slot = expr->NeedsProxySlot() |
| 1347 | ? expr->ProxySlot() |
| 1348 | : FeedbackVectorSlot::Invalid(); |
| 1349 | VisitVariableAssignment(var, Token::INIT, slot); |
| 1350 | } |
| 1351 | execution_result()->SetResultInAccumulator(); |
| 1352 | } |
| 1353 | |
| 1354 | void BytecodeGenerator::VisitClassLiteralForRuntimeDefinition( |
| 1355 | ClassLiteral* expr) { |
| 1356 | AccumulatorResultScope result_scope(this); |
| 1357 | register_allocator()->PrepareForConsecutiveAllocations(4); |
| 1358 | Register extends = register_allocator()->NextConsecutiveRegister(); |
| 1359 | Register constructor = register_allocator()->NextConsecutiveRegister(); |
| 1360 | Register start_position = register_allocator()->NextConsecutiveRegister(); |
| 1361 | Register end_position = register_allocator()->NextConsecutiveRegister(); |
| 1362 | |
| 1363 | VisitForAccumulatorValueOrTheHole(expr->extends()); |
| 1364 | builder()->StoreAccumulatorInRegister(extends); |
| 1365 | |
| 1366 | VisitForAccumulatorValue(expr->constructor()); |
| 1367 | builder() |
| 1368 | ->StoreAccumulatorInRegister(constructor) |
| 1369 | .LoadLiteral(Smi::FromInt(expr->start_position())) |
| 1370 | .StoreAccumulatorInRegister(start_position) |
| 1371 | .LoadLiteral(Smi::FromInt(expr->end_position())) |
| 1372 | .StoreAccumulatorInRegister(end_position) |
| 1373 | .CallRuntime(Runtime::kDefineClass, extends, 4); |
| 1374 | result_scope.SetResultInAccumulator(); |
| 1375 | } |
| 1376 | |
| 1377 | void BytecodeGenerator::VisitClassLiteralProperties(ClassLiteral* expr, |
| 1378 | Register literal, |
| 1379 | Register prototype) { |
| 1380 | RegisterAllocationScope register_scope(this); |
| 1381 | register_allocator()->PrepareForConsecutiveAllocations(5); |
| 1382 | Register receiver = register_allocator()->NextConsecutiveRegister(); |
| 1383 | Register key = register_allocator()->NextConsecutiveRegister(); |
| 1384 | Register value = register_allocator()->NextConsecutiveRegister(); |
| 1385 | Register attr = register_allocator()->NextConsecutiveRegister(); |
| 1386 | Register set_function_name = register_allocator()->NextConsecutiveRegister(); |
| 1387 | |
| 1388 | bool attr_assigned = false; |
| 1389 | Register old_receiver = Register::invalid_value(); |
| 1390 | |
| 1391 | // Create nodes to store method values into the literal. |
| 1392 | for (int i = 0; i < expr->properties()->length(); i++) { |
| 1393 | ObjectLiteral::Property* property = expr->properties()->at(i); |
| 1394 | |
| 1395 | // Set-up receiver. |
| 1396 | Register new_receiver = property->is_static() ? literal : prototype; |
| 1397 | if (new_receiver != old_receiver) { |
| 1398 | builder()->MoveRegister(new_receiver, receiver); |
| 1399 | old_receiver = new_receiver; |
| 1400 | } |
| 1401 | |
| 1402 | VisitForAccumulatorValue(property->key()); |
| 1403 | builder()->CastAccumulatorToName().StoreAccumulatorInRegister(key); |
| 1404 | // The static prototype property is read only. We handle the non computed |
| 1405 | // property name case in the parser. Since this is the only case where we |
| 1406 | // need to check for an own read only property we special case this so we do |
| 1407 | // not need to do this for every property. |
| 1408 | if (property->is_static() && property->is_computed_name()) { |
| 1409 | VisitClassLiteralStaticPrototypeWithComputedName(key); |
| 1410 | } |
| 1411 | VisitForAccumulatorValue(property->value()); |
| 1412 | builder()->StoreAccumulatorInRegister(value); |
| 1413 | |
| 1414 | VisitSetHomeObject(value, receiver, property); |
| 1415 | |
| 1416 | if (!attr_assigned) { |
| 1417 | builder() |
| 1418 | ->LoadLiteral(Smi::FromInt(DONT_ENUM)) |
| 1419 | .StoreAccumulatorInRegister(attr); |
| 1420 | attr_assigned = true; |
| 1421 | } |
| 1422 | |
| 1423 | switch (property->kind()) { |
| 1424 | case ObjectLiteral::Property::CONSTANT: |
| 1425 | case ObjectLiteral::Property::MATERIALIZED_LITERAL: |
| 1426 | case ObjectLiteral::Property::PROTOTYPE: |
| 1427 | // Invalid properties for ES6 classes. |
| 1428 | UNREACHABLE(); |
| 1429 | break; |
| 1430 | case ObjectLiteral::Property::COMPUTED: { |
| 1431 | builder() |
| 1432 | ->LoadLiteral(Smi::FromInt(property->NeedsSetFunctionName())) |
| 1433 | .StoreAccumulatorInRegister(set_function_name); |
| 1434 | builder()->CallRuntime(Runtime::kDefineDataPropertyInLiteral, receiver, |
| 1435 | 5); |
| 1436 | break; |
| 1437 | } |
| 1438 | case ObjectLiteral::Property::GETTER: { |
| 1439 | builder()->CallRuntime(Runtime::kDefineGetterPropertyUnchecked, |
| 1440 | receiver, 4); |
| 1441 | break; |
| 1442 | } |
| 1443 | case ObjectLiteral::Property::SETTER: { |
| 1444 | builder()->CallRuntime(Runtime::kDefineSetterPropertyUnchecked, |
| 1445 | receiver, 4); |
| 1446 | break; |
| 1447 | } |
| 1448 | } |
| 1449 | } |
| 1450 | } |
| 1451 | |
| 1452 | void BytecodeGenerator::VisitClassLiteralStaticPrototypeWithComputedName( |
| 1453 | Register key) { |
| 1454 | BytecodeLabel done; |
| 1455 | builder() |
| 1456 | ->LoadLiteral(isolate()->factory()->prototype_string()) |
| 1457 | .CompareOperation(Token::Value::EQ_STRICT, key) |
| 1458 | .JumpIfFalse(&done) |
| 1459 | .CallRuntime(Runtime::kThrowStaticPrototypeError, Register(0), 0) |
| 1460 | .Bind(&done); |
| 1461 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1462 | |
| 1463 | void BytecodeGenerator::VisitNativeFunctionLiteral( |
| 1464 | NativeFunctionLiteral* expr) { |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1465 | // Find or build a shared function info for the native function template. |
| 1466 | Handle<SharedFunctionInfo> shared_info = |
| 1467 | Compiler::GetSharedFunctionInfoForNative(expr->extension(), expr->name()); |
| 1468 | builder()->CreateClosure(shared_info, NOT_TENURED); |
| 1469 | execution_result()->SetResultInAccumulator(); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1470 | } |
| 1471 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1472 | void BytecodeGenerator::VisitDoExpression(DoExpression* expr) { |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1473 | VisitBlock(expr->block()); |
| 1474 | VisitVariableProxy(expr->result()); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1475 | } |
| 1476 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1477 | void BytecodeGenerator::VisitConditional(Conditional* expr) { |
| 1478 | // TODO(rmcilroy): Spot easy cases where there code would not need to |
| 1479 | // emit the then block or the else block, e.g. condition is |
| 1480 | // obviously true/1/false/0. |
| 1481 | |
| 1482 | BytecodeLabel else_label, end_label; |
| 1483 | |
| 1484 | VisitForAccumulatorValue(expr->condition()); |
| 1485 | builder()->JumpIfFalse(&else_label); |
| 1486 | |
| 1487 | VisitForAccumulatorValue(expr->then_expression()); |
| 1488 | builder()->Jump(&end_label); |
| 1489 | |
| 1490 | builder()->Bind(&else_label); |
| 1491 | VisitForAccumulatorValue(expr->else_expression()); |
| 1492 | builder()->Bind(&end_label); |
| 1493 | |
| 1494 | execution_result()->SetResultInAccumulator(); |
| 1495 | } |
| 1496 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1497 | void BytecodeGenerator::VisitLiteral(Literal* expr) { |
| 1498 | if (!execution_result()->IsEffect()) { |
| 1499 | Handle<Object> value = expr->value(); |
| 1500 | if (value->IsSmi()) { |
| 1501 | builder()->LoadLiteral(Smi::cast(*value)); |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 1502 | } else if (value->IsUndefined(isolate())) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1503 | builder()->LoadUndefined(); |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 1504 | } else if (value->IsTrue(isolate())) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1505 | builder()->LoadTrue(); |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 1506 | } else if (value->IsFalse(isolate())) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1507 | builder()->LoadFalse(); |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 1508 | } else if (value->IsNull(isolate())) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1509 | builder()->LoadNull(); |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 1510 | } else if (value->IsTheHole(isolate())) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1511 | builder()->LoadTheHole(); |
| 1512 | } else { |
| 1513 | builder()->LoadLiteral(value); |
| 1514 | } |
| 1515 | execution_result()->SetResultInAccumulator(); |
| 1516 | } |
| 1517 | } |
| 1518 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1519 | void BytecodeGenerator::VisitRegExpLiteral(RegExpLiteral* expr) { |
| 1520 | // Materialize a regular expression literal. |
| 1521 | builder()->CreateRegExpLiteral(expr->pattern(), expr->literal_index(), |
| 1522 | expr->flags()); |
| 1523 | execution_result()->SetResultInAccumulator(); |
| 1524 | } |
| 1525 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1526 | void BytecodeGenerator::VisitObjectLiteral(ObjectLiteral* expr) { |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 1527 | // Copy the literal boilerplate. |
| 1528 | int fast_clone_properties_count = 0; |
| 1529 | if (FastCloneShallowObjectStub::IsSupported(expr)) { |
| 1530 | STATIC_ASSERT( |
| 1531 | FastCloneShallowObjectStub::kMaximumClonedProperties <= |
| 1532 | 1 << CreateObjectLiteralFlags::FastClonePropertiesCountBits::kShift); |
| 1533 | fast_clone_properties_count = |
| 1534 | FastCloneShallowObjectStub::PropertiesCount(expr->properties_count()); |
| 1535 | } |
| 1536 | uint8_t flags = |
| 1537 | CreateObjectLiteralFlags::FlagsBits::encode(expr->ComputeFlags()) | |
| 1538 | CreateObjectLiteralFlags::FastClonePropertiesCountBits::encode( |
| 1539 | fast_clone_properties_count); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1540 | builder()->CreateObjectLiteral(expr->constant_properties(), |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 1541 | expr->literal_index(), flags); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1542 | |
| 1543 | // Allocate in the outer scope since this register is used to return the |
| 1544 | // expression's results to the caller. |
| 1545 | Register literal = register_allocator()->outer()->NewRegister(); |
| 1546 | builder()->StoreAccumulatorInRegister(literal); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1547 | |
| 1548 | // Store computed values into the literal. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1549 | int property_index = 0; |
| 1550 | AccessorTable accessor_table(zone()); |
| 1551 | for (; property_index < expr->properties()->length(); property_index++) { |
| 1552 | ObjectLiteral::Property* property = expr->properties()->at(property_index); |
| 1553 | if (property->is_computed_name()) break; |
| 1554 | if (property->IsCompileTimeValue()) continue; |
| 1555 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1556 | RegisterAllocationScope inner_register_scope(this); |
| 1557 | Literal* literal_key = property->key()->AsLiteral(); |
| 1558 | switch (property->kind()) { |
| 1559 | case ObjectLiteral::Property::CONSTANT: |
| 1560 | UNREACHABLE(); |
| 1561 | case ObjectLiteral::Property::MATERIALIZED_LITERAL: |
| 1562 | DCHECK(!CompileTimeValue::IsCompileTimeValue(property->value())); |
| 1563 | // Fall through. |
| 1564 | case ObjectLiteral::Property::COMPUTED: { |
| 1565 | // It is safe to use [[Put]] here because the boilerplate already |
| 1566 | // contains computed properties with an uninitialized value. |
| 1567 | if (literal_key->value()->IsInternalizedString()) { |
| 1568 | if (property->emit_store()) { |
| 1569 | VisitForAccumulatorValue(property->value()); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1570 | if (FunctionLiteral::NeedsHomeObject(property->value())) { |
| 1571 | RegisterAllocationScope register_scope(this); |
| 1572 | Register value = register_allocator()->NewRegister(); |
| 1573 | builder()->StoreAccumulatorInRegister(value); |
| 1574 | builder()->StoreNamedProperty( |
| 1575 | literal, literal_key->AsPropertyName(), |
| 1576 | feedback_index(property->GetSlot(0)), language_mode()); |
| 1577 | VisitSetHomeObject(value, literal, property, 1); |
| 1578 | } else { |
| 1579 | builder()->StoreNamedProperty( |
| 1580 | literal, literal_key->AsPropertyName(), |
| 1581 | feedback_index(property->GetSlot(0)), language_mode()); |
| 1582 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1583 | } else { |
| 1584 | VisitForEffect(property->value()); |
| 1585 | } |
| 1586 | } else { |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1587 | register_allocator()->PrepareForConsecutiveAllocations(4); |
| 1588 | Register literal_argument = |
| 1589 | register_allocator()->NextConsecutiveRegister(); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1590 | Register key = register_allocator()->NextConsecutiveRegister(); |
| 1591 | Register value = register_allocator()->NextConsecutiveRegister(); |
| 1592 | Register language = register_allocator()->NextConsecutiveRegister(); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1593 | |
| 1594 | builder()->MoveRegister(literal, literal_argument); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1595 | VisitForAccumulatorValue(property->key()); |
| 1596 | builder()->StoreAccumulatorInRegister(key); |
| 1597 | VisitForAccumulatorValue(property->value()); |
| 1598 | builder()->StoreAccumulatorInRegister(value); |
| 1599 | if (property->emit_store()) { |
| 1600 | builder() |
| 1601 | ->LoadLiteral(Smi::FromInt(SLOPPY)) |
| 1602 | .StoreAccumulatorInRegister(language) |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1603 | .CallRuntime(Runtime::kSetProperty, literal_argument, 4); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1604 | VisitSetHomeObject(value, literal, property); |
| 1605 | } |
| 1606 | } |
| 1607 | break; |
| 1608 | } |
| 1609 | case ObjectLiteral::Property::PROTOTYPE: { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1610 | DCHECK(property->emit_store()); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1611 | register_allocator()->PrepareForConsecutiveAllocations(2); |
| 1612 | Register literal_argument = |
| 1613 | register_allocator()->NextConsecutiveRegister(); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1614 | Register value = register_allocator()->NextConsecutiveRegister(); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1615 | |
| 1616 | builder()->MoveRegister(literal, literal_argument); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1617 | VisitForAccumulatorValue(property->value()); |
| 1618 | builder()->StoreAccumulatorInRegister(value).CallRuntime( |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1619 | Runtime::kInternalSetPrototype, literal_argument, 2); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1620 | break; |
| 1621 | } |
| 1622 | case ObjectLiteral::Property::GETTER: |
| 1623 | if (property->emit_store()) { |
| 1624 | accessor_table.lookup(literal_key)->second->getter = property; |
| 1625 | } |
| 1626 | break; |
| 1627 | case ObjectLiteral::Property::SETTER: |
| 1628 | if (property->emit_store()) { |
| 1629 | accessor_table.lookup(literal_key)->second->setter = property; |
| 1630 | } |
| 1631 | break; |
| 1632 | } |
| 1633 | } |
| 1634 | |
| 1635 | // Define accessors, using only a single call to the runtime for each pair of |
| 1636 | // corresponding getters and setters. |
| 1637 | for (AccessorTable::Iterator it = accessor_table.begin(); |
| 1638 | it != accessor_table.end(); ++it) { |
| 1639 | RegisterAllocationScope inner_register_scope(this); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1640 | register_allocator()->PrepareForConsecutiveAllocations(5); |
| 1641 | Register literal_argument = register_allocator()->NextConsecutiveRegister(); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1642 | Register name = register_allocator()->NextConsecutiveRegister(); |
| 1643 | Register getter = register_allocator()->NextConsecutiveRegister(); |
| 1644 | Register setter = register_allocator()->NextConsecutiveRegister(); |
| 1645 | Register attr = register_allocator()->NextConsecutiveRegister(); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1646 | |
| 1647 | builder()->MoveRegister(literal, literal_argument); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1648 | VisitForAccumulatorValue(it->first); |
| 1649 | builder()->StoreAccumulatorInRegister(name); |
| 1650 | VisitObjectLiteralAccessor(literal, it->second->getter, getter); |
| 1651 | VisitObjectLiteralAccessor(literal, it->second->setter, setter); |
| 1652 | builder() |
| 1653 | ->LoadLiteral(Smi::FromInt(NONE)) |
| 1654 | .StoreAccumulatorInRegister(attr) |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1655 | .CallRuntime(Runtime::kDefineAccessorPropertyUnchecked, |
| 1656 | literal_argument, 5); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1657 | } |
| 1658 | |
| 1659 | // Object literals have two parts. The "static" part on the left contains no |
| 1660 | // computed property names, and so we can compute its map ahead of time; see |
| 1661 | // Runtime_CreateObjectLiteralBoilerplate. The second "dynamic" part starts |
| 1662 | // with the first computed property name and continues with all properties to |
| 1663 | // its right. All the code from above initializes the static component of the |
| 1664 | // object literal, and arranges for the map of the result to reflect the |
| 1665 | // static order in which the keys appear. For the dynamic properties, we |
| 1666 | // compile them into a series of "SetOwnProperty" runtime calls. This will |
| 1667 | // preserve insertion order. |
| 1668 | for (; property_index < expr->properties()->length(); property_index++) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1669 | ObjectLiteral::Property* property = expr->properties()->at(property_index); |
| 1670 | RegisterAllocationScope inner_register_scope(this); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1671 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1672 | if (property->kind() == ObjectLiteral::Property::PROTOTYPE) { |
| 1673 | DCHECK(property->emit_store()); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1674 | register_allocator()->PrepareForConsecutiveAllocations(2); |
| 1675 | Register literal_argument = |
| 1676 | register_allocator()->NextConsecutiveRegister(); |
| 1677 | Register value = register_allocator()->NextConsecutiveRegister(); |
| 1678 | |
| 1679 | builder()->MoveRegister(literal, literal_argument); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1680 | VisitForAccumulatorValue(property->value()); |
| 1681 | builder()->StoreAccumulatorInRegister(value).CallRuntime( |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1682 | Runtime::kInternalSetPrototype, literal_argument, 2); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1683 | continue; |
| 1684 | } |
| 1685 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1686 | register_allocator()->PrepareForConsecutiveAllocations(5); |
| 1687 | Register literal_argument = register_allocator()->NextConsecutiveRegister(); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1688 | Register key = register_allocator()->NextConsecutiveRegister(); |
| 1689 | Register value = register_allocator()->NextConsecutiveRegister(); |
| 1690 | Register attr = register_allocator()->NextConsecutiveRegister(); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1691 | DCHECK(Register::AreContiguous(literal_argument, key, value, attr)); |
| 1692 | Register set_function_name = |
| 1693 | register_allocator()->NextConsecutiveRegister(); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1694 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1695 | builder()->MoveRegister(literal, literal_argument); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1696 | VisitForAccumulatorValue(property->key()); |
| 1697 | builder()->CastAccumulatorToName().StoreAccumulatorInRegister(key); |
| 1698 | VisitForAccumulatorValue(property->value()); |
| 1699 | builder()->StoreAccumulatorInRegister(value); |
| 1700 | VisitSetHomeObject(value, literal, property); |
| 1701 | builder()->LoadLiteral(Smi::FromInt(NONE)).StoreAccumulatorInRegister(attr); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1702 | switch (property->kind()) { |
| 1703 | case ObjectLiteral::Property::CONSTANT: |
| 1704 | case ObjectLiteral::Property::COMPUTED: |
| 1705 | case ObjectLiteral::Property::MATERIALIZED_LITERAL: |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1706 | builder() |
| 1707 | ->LoadLiteral(Smi::FromInt(property->NeedsSetFunctionName())) |
| 1708 | .StoreAccumulatorInRegister(set_function_name); |
| 1709 | builder()->CallRuntime(Runtime::kDefineDataPropertyInLiteral, |
| 1710 | literal_argument, 5); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1711 | break; |
| 1712 | case ObjectLiteral::Property::PROTOTYPE: |
| 1713 | UNREACHABLE(); // Handled specially above. |
| 1714 | break; |
| 1715 | case ObjectLiteral::Property::GETTER: |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1716 | builder()->CallRuntime(Runtime::kDefineGetterPropertyUnchecked, |
| 1717 | literal_argument, 4); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1718 | break; |
| 1719 | case ObjectLiteral::Property::SETTER: |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1720 | builder()->CallRuntime(Runtime::kDefineSetterPropertyUnchecked, |
| 1721 | literal_argument, 4); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1722 | break; |
| 1723 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1724 | } |
| 1725 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1726 | execution_result()->SetResultInRegister(literal); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1727 | } |
| 1728 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1729 | void BytecodeGenerator::VisitArrayLiteral(ArrayLiteral* expr) { |
| 1730 | // Deep-copy the literal boilerplate. |
| 1731 | builder()->CreateArrayLiteral(expr->constant_elements(), |
| 1732 | expr->literal_index(), |
| 1733 | expr->ComputeFlags(true)); |
| 1734 | Register index, literal; |
| 1735 | |
| 1736 | // Evaluate all the non-constant subexpressions and store them into the |
| 1737 | // newly cloned array. |
| 1738 | bool literal_in_accumulator = true; |
| 1739 | for (int array_index = 0; array_index < expr->values()->length(); |
| 1740 | array_index++) { |
| 1741 | Expression* subexpr = expr->values()->at(array_index); |
| 1742 | if (CompileTimeValue::IsCompileTimeValue(subexpr)) continue; |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1743 | DCHECK(!subexpr->IsSpread()); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1744 | |
| 1745 | if (literal_in_accumulator) { |
| 1746 | index = register_allocator()->NewRegister(); |
| 1747 | literal = register_allocator()->NewRegister(); |
| 1748 | builder()->StoreAccumulatorInRegister(literal); |
| 1749 | literal_in_accumulator = false; |
| 1750 | } |
| 1751 | |
| 1752 | FeedbackVectorSlot slot = expr->LiteralFeedbackSlot(); |
| 1753 | builder() |
| 1754 | ->LoadLiteral(Smi::FromInt(array_index)) |
| 1755 | .StoreAccumulatorInRegister(index); |
| 1756 | VisitForAccumulatorValue(subexpr); |
| 1757 | builder()->StoreKeyedProperty(literal, index, feedback_index(slot), |
| 1758 | language_mode()); |
| 1759 | } |
| 1760 | |
| 1761 | if (!literal_in_accumulator) { |
| 1762 | // Restore literal array into accumulator. |
| 1763 | builder()->LoadAccumulatorWithRegister(literal); |
| 1764 | } |
| 1765 | execution_result()->SetResultInAccumulator(); |
| 1766 | } |
| 1767 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1768 | void BytecodeGenerator::VisitVariableProxy(VariableProxy* proxy) { |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 1769 | builder()->SetExpressionPosition(proxy); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1770 | VisitVariableLoad(proxy->var(), proxy->VariableFeedbackSlot()); |
| 1771 | } |
| 1772 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1773 | void BytecodeGenerator::BuildHoleCheckForVariableLoad(VariableMode mode, |
| 1774 | Handle<String> name) { |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 1775 | if (mode == LET || mode == CONST) { |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1776 | BuildThrowIfHole(name); |
| 1777 | } |
| 1778 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1779 | |
| 1780 | void BytecodeGenerator::VisitVariableLoad(Variable* variable, |
| 1781 | FeedbackVectorSlot slot, |
| 1782 | TypeofMode typeof_mode) { |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1783 | VariableMode mode = variable->mode(); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1784 | switch (variable->location()) { |
| 1785 | case VariableLocation::LOCAL: { |
| 1786 | Register source(Register(variable->index())); |
| 1787 | builder()->LoadAccumulatorWithRegister(source); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1788 | BuildHoleCheckForVariableLoad(mode, variable->name()); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1789 | execution_result()->SetResultInAccumulator(); |
| 1790 | break; |
| 1791 | } |
| 1792 | case VariableLocation::PARAMETER: { |
| 1793 | // The parameter indices are shifted by 1 (receiver is variable |
| 1794 | // index -1 but is parameter index 0 in BytecodeArrayBuilder). |
| 1795 | Register source = builder()->Parameter(variable->index() + 1); |
| 1796 | builder()->LoadAccumulatorWithRegister(source); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1797 | BuildHoleCheckForVariableLoad(mode, variable->name()); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1798 | execution_result()->SetResultInAccumulator(); |
| 1799 | break; |
| 1800 | } |
| 1801 | case VariableLocation::GLOBAL: |
| 1802 | case VariableLocation::UNALLOCATED: { |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 1803 | builder()->LoadGlobal(feedback_index(slot), typeof_mode); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1804 | execution_result()->SetResultInAccumulator(); |
| 1805 | break; |
| 1806 | } |
| 1807 | case VariableLocation::CONTEXT: { |
| 1808 | int depth = execution_context()->ContextChainDepth(variable->scope()); |
| 1809 | ContextScope* context = execution_context()->Previous(depth); |
| 1810 | Register context_reg; |
| 1811 | if (context) { |
| 1812 | context_reg = context->reg(); |
| 1813 | } else { |
| 1814 | context_reg = register_allocator()->NewRegister(); |
| 1815 | // Walk the context chain to find the context at the given depth. |
| 1816 | // TODO(rmcilroy): Perform this work in a bytecode handler once we have |
| 1817 | // a generic mechanism for performing jumps in interpreter.cc. |
| 1818 | // TODO(mythria): Also update bytecode graph builder with correct depth |
| 1819 | // when this changes. |
| 1820 | builder() |
| 1821 | ->LoadAccumulatorWithRegister(execution_context()->reg()) |
| 1822 | .StoreAccumulatorInRegister(context_reg); |
| 1823 | for (int i = 0; i < depth; ++i) { |
| 1824 | builder() |
| 1825 | ->LoadContextSlot(context_reg, Context::PREVIOUS_INDEX) |
| 1826 | .StoreAccumulatorInRegister(context_reg); |
| 1827 | } |
| 1828 | } |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1829 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1830 | builder()->LoadContextSlot(context_reg, variable->index()); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1831 | BuildHoleCheckForVariableLoad(mode, variable->name()); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1832 | execution_result()->SetResultInAccumulator(); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1833 | break; |
| 1834 | } |
| 1835 | case VariableLocation::LOOKUP: { |
| 1836 | builder()->LoadLookupSlot(variable->name(), typeof_mode); |
| 1837 | execution_result()->SetResultInAccumulator(); |
| 1838 | break; |
| 1839 | } |
| 1840 | } |
| 1841 | } |
| 1842 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1843 | void BytecodeGenerator::VisitVariableLoadForAccumulatorValue( |
| 1844 | Variable* variable, FeedbackVectorSlot slot, TypeofMode typeof_mode) { |
| 1845 | AccumulatorResultScope accumulator_result(this); |
| 1846 | VisitVariableLoad(variable, slot, typeof_mode); |
| 1847 | } |
| 1848 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1849 | Register BytecodeGenerator::VisitVariableLoadForRegisterValue( |
| 1850 | Variable* variable, FeedbackVectorSlot slot, TypeofMode typeof_mode) { |
| 1851 | RegisterResultScope register_scope(this); |
| 1852 | VisitVariableLoad(variable, slot, typeof_mode); |
| 1853 | return register_scope.ResultRegister(); |
| 1854 | } |
| 1855 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1856 | void BytecodeGenerator::BuildNamedSuperPropertyLoad(Register receiver, |
| 1857 | Register home_object, |
| 1858 | Register name) { |
| 1859 | DCHECK(Register::AreContiguous(receiver, home_object, name)); |
| 1860 | builder()->CallRuntime(Runtime::kLoadFromSuper, receiver, 3); |
| 1861 | } |
| 1862 | |
| 1863 | void BytecodeGenerator::BuildKeyedSuperPropertyLoad(Register receiver, |
| 1864 | Register home_object, |
| 1865 | Register key) { |
| 1866 | DCHECK(Register::AreContiguous(receiver, home_object, key)); |
| 1867 | builder()->CallRuntime(Runtime::kLoadKeyedFromSuper, receiver, 3); |
| 1868 | } |
| 1869 | |
| 1870 | void BytecodeGenerator::BuildNamedSuperPropertyStore(Register receiver, |
| 1871 | Register home_object, |
| 1872 | Register name, |
| 1873 | Register value) { |
| 1874 | DCHECK(Register::AreContiguous(receiver, home_object, name, value)); |
| 1875 | Runtime::FunctionId function_id = is_strict(language_mode()) |
| 1876 | ? Runtime::kStoreToSuper_Strict |
| 1877 | : Runtime::kStoreToSuper_Sloppy; |
| 1878 | builder()->CallRuntime(function_id, receiver, 4); |
| 1879 | } |
| 1880 | |
| 1881 | void BytecodeGenerator::BuildKeyedSuperPropertyStore(Register receiver, |
| 1882 | Register home_object, |
| 1883 | Register key, |
| 1884 | Register value) { |
| 1885 | DCHECK(Register::AreContiguous(receiver, home_object, key, value)); |
| 1886 | Runtime::FunctionId function_id = is_strict(language_mode()) |
| 1887 | ? Runtime::kStoreKeyedToSuper_Strict |
| 1888 | : Runtime::kStoreKeyedToSuper_Sloppy; |
| 1889 | builder()->CallRuntime(function_id, receiver, 4); |
| 1890 | } |
| 1891 | |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 1892 | void BytecodeGenerator::BuildAbort(BailoutReason bailout_reason) { |
| 1893 | RegisterAllocationScope register_scope(this); |
| 1894 | Register reason = register_allocator()->NewRegister(); |
| 1895 | builder() |
| 1896 | ->LoadLiteral(Smi::FromInt(static_cast<int>(bailout_reason))) |
| 1897 | .StoreAccumulatorInRegister(reason) |
| 1898 | .CallRuntime(Runtime::kAbort, reason, 1); |
| 1899 | } |
| 1900 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1901 | void BytecodeGenerator::BuildThrowReferenceError(Handle<String> name) { |
| 1902 | RegisterAllocationScope register_scope(this); |
| 1903 | Register name_reg = register_allocator()->NewRegister(); |
| 1904 | builder()->LoadLiteral(name).StoreAccumulatorInRegister(name_reg).CallRuntime( |
| 1905 | Runtime::kThrowReferenceError, name_reg, 1); |
| 1906 | } |
| 1907 | |
| 1908 | void BytecodeGenerator::BuildThrowIfHole(Handle<String> name) { |
| 1909 | // TODO(interpreter): Can the parser reduce the number of checks |
| 1910 | // performed? Or should there be a ThrowIfHole bytecode. |
| 1911 | BytecodeLabel no_reference_error; |
| 1912 | builder()->JumpIfNotHole(&no_reference_error); |
| 1913 | BuildThrowReferenceError(name); |
| 1914 | builder()->Bind(&no_reference_error); |
| 1915 | } |
| 1916 | |
| 1917 | void BytecodeGenerator::BuildThrowIfNotHole(Handle<String> name) { |
| 1918 | // TODO(interpreter): Can the parser reduce the number of checks |
| 1919 | // performed? Or should there be a ThrowIfNotHole bytecode. |
| 1920 | BytecodeLabel no_reference_error, reference_error; |
| 1921 | builder() |
| 1922 | ->JumpIfNotHole(&reference_error) |
| 1923 | .Jump(&no_reference_error) |
| 1924 | .Bind(&reference_error); |
| 1925 | BuildThrowReferenceError(name); |
| 1926 | builder()->Bind(&no_reference_error); |
| 1927 | } |
| 1928 | |
| 1929 | void BytecodeGenerator::BuildThrowReassignConstant(Handle<String> name) { |
| 1930 | // TODO(mythria): This will be replaced by a new bytecode that throws an |
| 1931 | // appropriate error depending on the whether the value is a hole or not. |
| 1932 | BytecodeLabel const_assign_error; |
| 1933 | builder()->JumpIfNotHole(&const_assign_error); |
| 1934 | BuildThrowReferenceError(name); |
| 1935 | builder() |
| 1936 | ->Bind(&const_assign_error) |
| 1937 | .CallRuntime(Runtime::kThrowConstAssignError, Register(), 0); |
| 1938 | } |
| 1939 | |
| 1940 | void BytecodeGenerator::BuildHoleCheckForVariableAssignment(Variable* variable, |
| 1941 | Token::Value op) { |
| 1942 | VariableMode mode = variable->mode(); |
| 1943 | DCHECK(mode != CONST_LEGACY); |
| 1944 | if (mode == CONST && op != Token::INIT) { |
| 1945 | // Non-intializing assignments to constant is not allowed. |
| 1946 | BuildThrowReassignConstant(variable->name()); |
| 1947 | } else if (mode == LET && op != Token::INIT) { |
| 1948 | // Perform an initialization check for let declared variables. |
| 1949 | // E.g. let x = (x = 20); is not allowed. |
| 1950 | BuildThrowIfHole(variable->name()); |
| 1951 | } else { |
| 1952 | DCHECK(variable->is_this() && mode == CONST && op == Token::INIT); |
| 1953 | // Perform an initialization check for 'this'. 'this' variable is the |
| 1954 | // only variable able to trigger bind operations outside the TDZ |
| 1955 | // via 'super' calls. |
| 1956 | BuildThrowIfNotHole(variable->name()); |
| 1957 | } |
| 1958 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1959 | |
| 1960 | void BytecodeGenerator::VisitVariableAssignment(Variable* variable, |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1961 | Token::Value op, |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1962 | FeedbackVectorSlot slot) { |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1963 | VariableMode mode = variable->mode(); |
| 1964 | RegisterAllocationScope assignment_register_scope(this); |
| 1965 | BytecodeLabel end_label; |
| 1966 | bool hole_check_required = |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 1967 | (mode == LET && op != Token::INIT) || |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1968 | (mode == CONST && op != Token::INIT) || |
| 1969 | (mode == CONST && op == Token::INIT && variable->is_this()); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1970 | switch (variable->location()) { |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1971 | case VariableLocation::PARAMETER: |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1972 | case VariableLocation::LOCAL: { |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1973 | Register destination; |
| 1974 | if (VariableLocation::PARAMETER == variable->location()) { |
| 1975 | destination = Register(builder()->Parameter(variable->index() + 1)); |
| 1976 | } else { |
| 1977 | destination = Register(variable->index()); |
| 1978 | } |
| 1979 | |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 1980 | if (mode == CONST_LEGACY && op != Token::INIT) { |
| 1981 | if (is_strict(language_mode())) { |
| 1982 | builder()->CallRuntime(Runtime::kThrowConstAssignError, Register(), |
| 1983 | 0); |
| 1984 | } |
| 1985 | // Non-initializing assignments to legacy constants are ignored |
| 1986 | // in sloppy mode. Break here to avoid storing into variable. |
| 1987 | break; |
| 1988 | } |
| 1989 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1990 | if (hole_check_required) { |
| 1991 | // Load destination to check for hole. |
| 1992 | Register value_temp = register_allocator()->NewRegister(); |
| 1993 | builder() |
| 1994 | ->StoreAccumulatorInRegister(value_temp) |
| 1995 | .LoadAccumulatorWithRegister(destination); |
| 1996 | |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 1997 | BuildHoleCheckForVariableAssignment(variable, op); |
| 1998 | builder()->LoadAccumulatorWithRegister(value_temp); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1999 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2000 | builder()->StoreAccumulatorInRegister(destination); |
| 2001 | break; |
| 2002 | } |
| 2003 | case VariableLocation::GLOBAL: |
| 2004 | case VariableLocation::UNALLOCATED: { |
| 2005 | builder()->StoreGlobal(variable->name(), feedback_index(slot), |
| 2006 | language_mode()); |
| 2007 | break; |
| 2008 | } |
| 2009 | case VariableLocation::CONTEXT: { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2010 | int depth = execution_context()->ContextChainDepth(variable->scope()); |
| 2011 | ContextScope* context = execution_context()->Previous(depth); |
| 2012 | Register context_reg; |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 2013 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2014 | if (context) { |
| 2015 | context_reg = context->reg(); |
| 2016 | } else { |
| 2017 | Register value_temp = register_allocator()->NewRegister(); |
| 2018 | context_reg = register_allocator()->NewRegister(); |
| 2019 | // Walk the context chain to find the context at the given depth. |
| 2020 | // TODO(rmcilroy): Perform this work in a bytecode handler once we have |
| 2021 | // a generic mechanism for performing jumps in interpreter.cc. |
| 2022 | // TODO(mythria): Also update bytecode graph builder with correct depth |
| 2023 | // when this changes. |
| 2024 | builder() |
| 2025 | ->StoreAccumulatorInRegister(value_temp) |
| 2026 | .LoadAccumulatorWithRegister(execution_context()->reg()) |
| 2027 | .StoreAccumulatorInRegister(context_reg); |
| 2028 | for (int i = 0; i < depth; ++i) { |
| 2029 | builder() |
| 2030 | ->LoadContextSlot(context_reg, Context::PREVIOUS_INDEX) |
| 2031 | .StoreAccumulatorInRegister(context_reg); |
| 2032 | } |
| 2033 | builder()->LoadAccumulatorWithRegister(value_temp); |
| 2034 | } |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 2035 | |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 2036 | if (mode == CONST_LEGACY && op != Token::INIT) { |
| 2037 | if (is_strict(language_mode())) { |
| 2038 | builder()->CallRuntime(Runtime::kThrowConstAssignError, Register(), |
| 2039 | 0); |
| 2040 | } |
| 2041 | // Non-initializing assignments to legacy constants are ignored |
| 2042 | // in sloppy mode. Break here to avoid storing into variable. |
| 2043 | break; |
| 2044 | } |
| 2045 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 2046 | if (hole_check_required) { |
| 2047 | // Load destination to check for hole. |
| 2048 | Register value_temp = register_allocator()->NewRegister(); |
| 2049 | builder() |
| 2050 | ->StoreAccumulatorInRegister(value_temp) |
| 2051 | .LoadContextSlot(context_reg, variable->index()); |
| 2052 | |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 2053 | BuildHoleCheckForVariableAssignment(variable, op); |
| 2054 | builder()->LoadAccumulatorWithRegister(value_temp); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 2055 | } |
| 2056 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2057 | builder()->StoreContextSlot(context_reg, variable->index()); |
| 2058 | break; |
| 2059 | } |
| 2060 | case VariableLocation::LOOKUP: { |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 2061 | DCHECK_NE(CONST_LEGACY, variable->mode()); |
| 2062 | builder()->StoreLookupSlot(variable->name(), language_mode()); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2063 | break; |
| 2064 | } |
| 2065 | } |
| 2066 | } |
| 2067 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2068 | void BytecodeGenerator::VisitAssignment(Assignment* expr) { |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 2069 | DCHECK(expr->target()->IsValidReferenceExpressionOrThis()); |
| 2070 | Register object, key, home_object, value; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2071 | Handle<String> name; |
| 2072 | |
| 2073 | // Left-hand side can only be a property, a global or a variable slot. |
| 2074 | Property* property = expr->target()->AsProperty(); |
| 2075 | LhsKind assign_type = Property::GetAssignType(property); |
| 2076 | |
| 2077 | // Evaluate LHS expression. |
| 2078 | switch (assign_type) { |
| 2079 | case VARIABLE: |
| 2080 | // Nothing to do to evaluate variable assignment LHS. |
| 2081 | break; |
| 2082 | case NAMED_PROPERTY: { |
| 2083 | object = VisitForRegisterValue(property->obj()); |
| 2084 | name = property->key()->AsLiteral()->AsPropertyName(); |
| 2085 | break; |
| 2086 | } |
| 2087 | case KEYED_PROPERTY: { |
| 2088 | object = VisitForRegisterValue(property->obj()); |
| 2089 | if (expr->is_compound()) { |
| 2090 | // Use VisitForAccumulator and store to register so that the key is |
| 2091 | // still in the accumulator for loading the old value below. |
| 2092 | key = register_allocator()->NewRegister(); |
| 2093 | VisitForAccumulatorValue(property->key()); |
| 2094 | builder()->StoreAccumulatorInRegister(key); |
| 2095 | } else { |
| 2096 | key = VisitForRegisterValue(property->key()); |
| 2097 | } |
| 2098 | break; |
| 2099 | } |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 2100 | case NAMED_SUPER_PROPERTY: { |
| 2101 | register_allocator()->PrepareForConsecutiveAllocations(4); |
| 2102 | object = register_allocator()->NextConsecutiveRegister(); |
| 2103 | home_object = register_allocator()->NextConsecutiveRegister(); |
| 2104 | key = register_allocator()->NextConsecutiveRegister(); |
| 2105 | value = register_allocator()->NextConsecutiveRegister(); |
| 2106 | SuperPropertyReference* super_property = |
| 2107 | property->obj()->AsSuperPropertyReference(); |
| 2108 | VisitForRegisterValue(super_property->this_var(), object); |
| 2109 | VisitForRegisterValue(super_property->home_object(), home_object); |
| 2110 | builder() |
| 2111 | ->LoadLiteral(property->key()->AsLiteral()->AsPropertyName()) |
| 2112 | .StoreAccumulatorInRegister(key); |
| 2113 | break; |
| 2114 | } |
| 2115 | case KEYED_SUPER_PROPERTY: { |
| 2116 | register_allocator()->PrepareForConsecutiveAllocations(4); |
| 2117 | object = register_allocator()->NextConsecutiveRegister(); |
| 2118 | home_object = register_allocator()->NextConsecutiveRegister(); |
| 2119 | key = register_allocator()->NextConsecutiveRegister(); |
| 2120 | value = register_allocator()->NextConsecutiveRegister(); |
| 2121 | builder()->StoreAccumulatorInRegister(value); |
| 2122 | SuperPropertyReference* super_property = |
| 2123 | property->obj()->AsSuperPropertyReference(); |
| 2124 | VisitForRegisterValue(super_property->this_var(), object); |
| 2125 | VisitForRegisterValue(super_property->home_object(), home_object); |
| 2126 | VisitForRegisterValue(property->key(), key); |
| 2127 | break; |
| 2128 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2129 | } |
| 2130 | |
| 2131 | // Evaluate the value and potentially handle compound assignments by loading |
| 2132 | // the left-hand side value and performing a binary operation. |
| 2133 | if (expr->is_compound()) { |
| 2134 | Register old_value; |
| 2135 | switch (assign_type) { |
| 2136 | case VARIABLE: { |
| 2137 | VariableProxy* proxy = expr->target()->AsVariableProxy(); |
| 2138 | old_value = VisitVariableLoadForRegisterValue( |
| 2139 | proxy->var(), proxy->VariableFeedbackSlot()); |
| 2140 | break; |
| 2141 | } |
| 2142 | case NAMED_PROPERTY: { |
| 2143 | FeedbackVectorSlot slot = property->PropertyFeedbackSlot(); |
| 2144 | old_value = register_allocator()->NewRegister(); |
| 2145 | builder() |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 2146 | ->LoadNamedProperty(object, name, feedback_index(slot)) |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2147 | .StoreAccumulatorInRegister(old_value); |
| 2148 | break; |
| 2149 | } |
| 2150 | case KEYED_PROPERTY: { |
| 2151 | // Key is already in accumulator at this point due to evaluating the |
| 2152 | // LHS above. |
| 2153 | FeedbackVectorSlot slot = property->PropertyFeedbackSlot(); |
| 2154 | old_value = register_allocator()->NewRegister(); |
| 2155 | builder() |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 2156 | ->LoadKeyedProperty(object, feedback_index(slot)) |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2157 | .StoreAccumulatorInRegister(old_value); |
| 2158 | break; |
| 2159 | } |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 2160 | case NAMED_SUPER_PROPERTY: { |
| 2161 | old_value = register_allocator()->NewRegister(); |
| 2162 | BuildNamedSuperPropertyLoad(object, home_object, key); |
| 2163 | builder()->StoreAccumulatorInRegister(old_value); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2164 | break; |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 2165 | } |
| 2166 | case KEYED_SUPER_PROPERTY: { |
| 2167 | old_value = register_allocator()->NewRegister(); |
| 2168 | BuildKeyedSuperPropertyLoad(object, home_object, key); |
| 2169 | builder()->StoreAccumulatorInRegister(old_value); |
| 2170 | break; |
| 2171 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2172 | } |
| 2173 | VisitForAccumulatorValue(expr->value()); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 2174 | builder()->BinaryOperation(expr->binary_op(), old_value); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2175 | } else { |
| 2176 | VisitForAccumulatorValue(expr->value()); |
| 2177 | } |
| 2178 | |
| 2179 | // Store the value. |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 2180 | builder()->SetExpressionPosition(expr); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2181 | FeedbackVectorSlot slot = expr->AssignmentSlot(); |
| 2182 | switch (assign_type) { |
| 2183 | case VARIABLE: { |
| 2184 | // TODO(oth): The VisitVariableAssignment() call is hard to reason about. |
| 2185 | // Is the value in the accumulator safe? Yes, but scary. |
| 2186 | Variable* variable = expr->target()->AsVariableProxy()->var(); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 2187 | VisitVariableAssignment(variable, expr->op(), slot); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2188 | break; |
| 2189 | } |
| 2190 | case NAMED_PROPERTY: |
| 2191 | builder()->StoreNamedProperty(object, name, feedback_index(slot), |
| 2192 | language_mode()); |
| 2193 | break; |
| 2194 | case KEYED_PROPERTY: |
| 2195 | builder()->StoreKeyedProperty(object, key, feedback_index(slot), |
| 2196 | language_mode()); |
| 2197 | break; |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 2198 | case NAMED_SUPER_PROPERTY: { |
| 2199 | builder()->StoreAccumulatorInRegister(value); |
| 2200 | BuildNamedSuperPropertyStore(object, home_object, key, value); |
| 2201 | break; |
| 2202 | } |
| 2203 | case KEYED_SUPER_PROPERTY: { |
| 2204 | builder()->StoreAccumulatorInRegister(value); |
| 2205 | BuildKeyedSuperPropertyStore(object, home_object, key, value); |
| 2206 | break; |
| 2207 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2208 | } |
| 2209 | execution_result()->SetResultInAccumulator(); |
| 2210 | } |
| 2211 | |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 2212 | void BytecodeGenerator::VisitYield(Yield* expr) { |
| 2213 | builder()->SetExpressionPosition(expr); |
| 2214 | Register value = VisitForRegisterValue(expr->expression()); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2215 | |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 2216 | Register generator = VisitForRegisterValue(expr->generator_object()); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2217 | |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 2218 | // Save context, registers, and state. Then return. |
| 2219 | builder() |
| 2220 | ->LoadLiteral(Smi::FromInt(expr->yield_id())) |
| 2221 | .SuspendGenerator(generator) |
| 2222 | .LoadAccumulatorWithRegister(value) |
| 2223 | .Return(); // Hard return (ignore any finally blocks). |
| 2224 | |
| 2225 | builder()->Bind(&(generator_resume_points_[expr->yield_id()])); |
| 2226 | // Upon resume, we continue here. |
| 2227 | |
| 2228 | { |
| 2229 | RegisterAllocationScope register_scope(this); |
| 2230 | |
| 2231 | // Update state to indicate that we have finished resuming. Loop headers |
| 2232 | // rely on this. |
| 2233 | builder() |
| 2234 | ->LoadLiteral(Smi::FromInt(JSGeneratorObject::kGeneratorExecuting)) |
| 2235 | .StoreAccumulatorInRegister(generator_state_); |
| 2236 | |
| 2237 | Register input = register_allocator()->NewRegister(); |
| 2238 | builder() |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 2239 | ->CallRuntime(Runtime::kInlineGeneratorGetInputOrDebugPos, generator, 1) |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 2240 | .StoreAccumulatorInRegister(input); |
| 2241 | |
| 2242 | Register resume_mode = register_allocator()->NewRegister(); |
| 2243 | builder() |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 2244 | ->CallRuntime(Runtime::kInlineGeneratorGetResumeMode, generator, 1) |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 2245 | .StoreAccumulatorInRegister(resume_mode); |
| 2246 | |
| 2247 | // Now dispatch on resume mode. |
| 2248 | |
| 2249 | BytecodeLabel resume_with_next; |
| 2250 | BytecodeLabel resume_with_return; |
| 2251 | BytecodeLabel resume_with_throw; |
| 2252 | |
| 2253 | builder() |
| 2254 | ->LoadLiteral(Smi::FromInt(JSGeneratorObject::kNext)) |
| 2255 | .CompareOperation(Token::EQ_STRICT, resume_mode) |
| 2256 | .JumpIfTrue(&resume_with_next) |
| 2257 | .LoadLiteral(Smi::FromInt(JSGeneratorObject::kThrow)) |
| 2258 | .CompareOperation(Token::EQ_STRICT, resume_mode) |
| 2259 | .JumpIfTrue(&resume_with_throw) |
| 2260 | .Jump(&resume_with_return); |
| 2261 | |
| 2262 | builder()->Bind(&resume_with_return); |
| 2263 | { |
| 2264 | register_allocator()->PrepareForConsecutiveAllocations(2); |
| 2265 | Register value = register_allocator()->NextConsecutiveRegister(); |
| 2266 | Register done = register_allocator()->NextConsecutiveRegister(); |
| 2267 | builder() |
| 2268 | ->MoveRegister(input, value) |
| 2269 | .LoadTrue() |
| 2270 | .StoreAccumulatorInRegister(done) |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 2271 | .CallRuntime(Runtime::kInlineCreateIterResultObject, value, 2); |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 2272 | execution_control()->ReturnAccumulator(); |
| 2273 | } |
| 2274 | |
| 2275 | builder()->Bind(&resume_with_throw); |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 2276 | builder()->SetExpressionPosition(expr); |
| 2277 | builder()->LoadAccumulatorWithRegister(input).Throw(); |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 2278 | |
| 2279 | builder()->Bind(&resume_with_next); |
| 2280 | builder()->LoadAccumulatorWithRegister(input); |
| 2281 | } |
| 2282 | execution_result()->SetResultInAccumulator(); |
| 2283 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2284 | |
| 2285 | void BytecodeGenerator::VisitThrow(Throw* expr) { |
| 2286 | VisitForAccumulatorValue(expr->exception()); |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 2287 | builder()->SetExpressionPosition(expr); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2288 | builder()->Throw(); |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 2289 | // Throw statements are modeled as expressions instead of statements. These |
| 2290 | // are converted from assignment statements in Rewriter::ReWrite pass. An |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 2291 | // assignment statement expects a value in the accumulator. This is a hack to |
| 2292 | // avoid DCHECK fails assert accumulator has been set. |
| 2293 | execution_result()->SetResultInAccumulator(); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2294 | } |
| 2295 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2296 | void BytecodeGenerator::VisitPropertyLoad(Register obj, Property* expr) { |
| 2297 | LhsKind property_kind = Property::GetAssignType(expr); |
| 2298 | FeedbackVectorSlot slot = expr->PropertyFeedbackSlot(); |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 2299 | builder()->SetExpressionPosition(expr); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2300 | switch (property_kind) { |
| 2301 | case VARIABLE: |
| 2302 | UNREACHABLE(); |
| 2303 | case NAMED_PROPERTY: { |
| 2304 | builder()->LoadNamedProperty(obj, |
| 2305 | expr->key()->AsLiteral()->AsPropertyName(), |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 2306 | feedback_index(slot)); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2307 | break; |
| 2308 | } |
| 2309 | case KEYED_PROPERTY: { |
| 2310 | VisitForAccumulatorValue(expr->key()); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 2311 | builder()->LoadKeyedProperty(obj, feedback_index(slot)); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2312 | break; |
| 2313 | } |
| 2314 | case NAMED_SUPER_PROPERTY: |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 2315 | VisitNamedSuperPropertyLoad(expr, Register::invalid_value()); |
| 2316 | break; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2317 | case KEYED_SUPER_PROPERTY: |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 2318 | VisitKeyedSuperPropertyLoad(expr, Register::invalid_value()); |
| 2319 | break; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2320 | } |
| 2321 | execution_result()->SetResultInAccumulator(); |
| 2322 | } |
| 2323 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2324 | void BytecodeGenerator::VisitPropertyLoadForAccumulator(Register obj, |
| 2325 | Property* expr) { |
| 2326 | AccumulatorResultScope result_scope(this); |
| 2327 | VisitPropertyLoad(obj, expr); |
| 2328 | } |
| 2329 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 2330 | void BytecodeGenerator::VisitNamedSuperPropertyLoad(Property* property, |
| 2331 | Register opt_receiver_out) { |
| 2332 | RegisterAllocationScope register_scope(this); |
| 2333 | register_allocator()->PrepareForConsecutiveAllocations(3); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2334 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 2335 | Register receiver, home_object, name; |
| 2336 | receiver = register_allocator()->NextConsecutiveRegister(); |
| 2337 | home_object = register_allocator()->NextConsecutiveRegister(); |
| 2338 | name = register_allocator()->NextConsecutiveRegister(); |
| 2339 | SuperPropertyReference* super_property = |
| 2340 | property->obj()->AsSuperPropertyReference(); |
| 2341 | VisitForRegisterValue(super_property->this_var(), receiver); |
| 2342 | VisitForRegisterValue(super_property->home_object(), home_object); |
| 2343 | builder() |
| 2344 | ->LoadLiteral(property->key()->AsLiteral()->AsPropertyName()) |
| 2345 | .StoreAccumulatorInRegister(name); |
| 2346 | BuildNamedSuperPropertyLoad(receiver, home_object, name); |
| 2347 | |
| 2348 | if (opt_receiver_out.is_valid()) { |
| 2349 | builder()->MoveRegister(receiver, opt_receiver_out); |
| 2350 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2351 | } |
| 2352 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 2353 | void BytecodeGenerator::VisitKeyedSuperPropertyLoad(Property* property, |
| 2354 | Register opt_receiver_out) { |
| 2355 | RegisterAllocationScope register_scope(this); |
| 2356 | register_allocator()->PrepareForConsecutiveAllocations(3); |
| 2357 | |
| 2358 | Register receiver, home_object, key; |
| 2359 | receiver = register_allocator()->NextConsecutiveRegister(); |
| 2360 | home_object = register_allocator()->NextConsecutiveRegister(); |
| 2361 | key = register_allocator()->NextConsecutiveRegister(); |
| 2362 | SuperPropertyReference* super_property = |
| 2363 | property->obj()->AsSuperPropertyReference(); |
| 2364 | VisitForRegisterValue(super_property->this_var(), receiver); |
| 2365 | VisitForRegisterValue(super_property->home_object(), home_object); |
| 2366 | VisitForRegisterValue(property->key(), key); |
| 2367 | BuildKeyedSuperPropertyLoad(receiver, home_object, key); |
| 2368 | |
| 2369 | if (opt_receiver_out.is_valid()) { |
| 2370 | builder()->MoveRegister(receiver, opt_receiver_out); |
| 2371 | } |
| 2372 | } |
| 2373 | |
| 2374 | void BytecodeGenerator::VisitProperty(Property* expr) { |
| 2375 | LhsKind property_kind = Property::GetAssignType(expr); |
| 2376 | if (property_kind != NAMED_SUPER_PROPERTY && |
| 2377 | property_kind != KEYED_SUPER_PROPERTY) { |
| 2378 | Register obj = VisitForRegisterValue(expr->obj()); |
| 2379 | VisitPropertyLoad(obj, expr); |
| 2380 | } else { |
| 2381 | VisitPropertyLoad(Register::invalid_value(), expr); |
| 2382 | } |
| 2383 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2384 | |
| 2385 | Register BytecodeGenerator::VisitArguments(ZoneList<Expression*>* args) { |
| 2386 | if (args->length() == 0) { |
| 2387 | return Register(); |
| 2388 | } |
| 2389 | |
| 2390 | // Visit arguments and place in a contiguous block of temporary |
| 2391 | // registers. Return the first temporary register corresponding to |
| 2392 | // the first argument. |
| 2393 | // |
| 2394 | // NB the caller may have already called |
| 2395 | // PrepareForConsecutiveAllocations() with args->length() + N. The |
| 2396 | // second call here will be a no-op provided there have been N or |
| 2397 | // less calls to NextConsecutiveRegister(). Otherwise, the arguments |
| 2398 | // here will be consecutive, but they will not be consecutive with |
| 2399 | // earlier consecutive allocations made by the caller. |
| 2400 | register_allocator()->PrepareForConsecutiveAllocations(args->length()); |
| 2401 | |
| 2402 | // Visit for first argument that goes into returned register |
| 2403 | Register first_arg = register_allocator()->NextConsecutiveRegister(); |
| 2404 | VisitForAccumulatorValue(args->at(0)); |
| 2405 | builder()->StoreAccumulatorInRegister(first_arg); |
| 2406 | |
| 2407 | // Visit remaining arguments |
| 2408 | for (int i = 1; i < static_cast<int>(args->length()); i++) { |
| 2409 | Register ith_arg = register_allocator()->NextConsecutiveRegister(); |
| 2410 | VisitForAccumulatorValue(args->at(i)); |
| 2411 | builder()->StoreAccumulatorInRegister(ith_arg); |
| 2412 | DCHECK(ith_arg.index() - i == first_arg.index()); |
| 2413 | } |
| 2414 | return first_arg; |
| 2415 | } |
| 2416 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2417 | void BytecodeGenerator::VisitCall(Call* expr) { |
| 2418 | Expression* callee_expr = expr->expression(); |
| 2419 | Call::CallType call_type = expr->GetCallType(isolate()); |
| 2420 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 2421 | if (call_type == Call::SUPER_CALL) { |
| 2422 | return VisitCallSuper(expr); |
| 2423 | } |
| 2424 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2425 | // Prepare the callee and the receiver to the function call. This depends on |
| 2426 | // the semantics of the underlying call type. |
| 2427 | |
| 2428 | // The receiver and arguments need to be allocated consecutively for |
| 2429 | // Call(). We allocate the callee and receiver consecutively for calls to |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 2430 | // %LoadLookupSlotForCall. Future optimizations could avoid this there are |
| 2431 | // no arguments or the receiver and arguments are already consecutive. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2432 | ZoneList<Expression*>* args = expr->arguments(); |
| 2433 | register_allocator()->PrepareForConsecutiveAllocations(args->length() + 2); |
| 2434 | Register callee = register_allocator()->NextConsecutiveRegister(); |
| 2435 | Register receiver = register_allocator()->NextConsecutiveRegister(); |
| 2436 | |
| 2437 | switch (call_type) { |
| 2438 | case Call::NAMED_PROPERTY_CALL: |
| 2439 | case Call::KEYED_PROPERTY_CALL: { |
| 2440 | Property* property = callee_expr->AsProperty(); |
| 2441 | VisitForAccumulatorValue(property->obj()); |
| 2442 | builder()->StoreAccumulatorInRegister(receiver); |
| 2443 | VisitPropertyLoadForAccumulator(receiver, property); |
| 2444 | builder()->StoreAccumulatorInRegister(callee); |
| 2445 | break; |
| 2446 | } |
| 2447 | case Call::GLOBAL_CALL: { |
| 2448 | // Receiver is undefined for global calls. |
| 2449 | builder()->LoadUndefined().StoreAccumulatorInRegister(receiver); |
| 2450 | // Load callee as a global variable. |
| 2451 | VariableProxy* proxy = callee_expr->AsVariableProxy(); |
| 2452 | VisitVariableLoadForAccumulatorValue(proxy->var(), |
| 2453 | proxy->VariableFeedbackSlot()); |
| 2454 | builder()->StoreAccumulatorInRegister(callee); |
| 2455 | break; |
| 2456 | } |
| 2457 | case Call::LOOKUP_SLOT_CALL: |
| 2458 | case Call::POSSIBLY_EVAL_CALL: { |
| 2459 | if (callee_expr->AsVariableProxy()->var()->IsLookupSlot()) { |
| 2460 | RegisterAllocationScope inner_register_scope(this); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 2461 | Register name = register_allocator()->NewRegister(); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2462 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 2463 | // Call %LoadLookupSlotForCall to get the callee and receiver. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2464 | DCHECK(Register::AreContiguous(callee, receiver)); |
| 2465 | Variable* variable = callee_expr->AsVariableProxy()->var(); |
| 2466 | builder() |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 2467 | ->LoadLiteral(variable->name()) |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2468 | .StoreAccumulatorInRegister(name) |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 2469 | .CallRuntimeForPair(Runtime::kLoadLookupSlotForCall, name, 1, |
| 2470 | callee); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2471 | break; |
| 2472 | } |
| 2473 | // Fall through. |
| 2474 | DCHECK_EQ(call_type, Call::POSSIBLY_EVAL_CALL); |
| 2475 | } |
| 2476 | case Call::OTHER_CALL: { |
| 2477 | builder()->LoadUndefined().StoreAccumulatorInRegister(receiver); |
| 2478 | VisitForAccumulatorValue(callee_expr); |
| 2479 | builder()->StoreAccumulatorInRegister(callee); |
| 2480 | break; |
| 2481 | } |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 2482 | case Call::NAMED_SUPER_PROPERTY_CALL: { |
| 2483 | Property* property = callee_expr->AsProperty(); |
| 2484 | VisitNamedSuperPropertyLoad(property, receiver); |
| 2485 | builder()->StoreAccumulatorInRegister(callee); |
| 2486 | break; |
| 2487 | } |
| 2488 | case Call::KEYED_SUPER_PROPERTY_CALL: { |
| 2489 | Property* property = callee_expr->AsProperty(); |
| 2490 | VisitKeyedSuperPropertyLoad(property, receiver); |
| 2491 | builder()->StoreAccumulatorInRegister(callee); |
| 2492 | break; |
| 2493 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2494 | case Call::SUPER_CALL: |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 2495 | UNREACHABLE(); |
| 2496 | break; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2497 | } |
| 2498 | |
| 2499 | // Evaluate all arguments to the function call and store in sequential |
| 2500 | // registers. |
| 2501 | Register arg = VisitArguments(args); |
| 2502 | CHECK(args->length() == 0 || arg.index() == receiver.index() + 1); |
| 2503 | |
| 2504 | // Resolve callee for a potential direct eval call. This block will mutate the |
| 2505 | // callee value. |
| 2506 | if (call_type == Call::POSSIBLY_EVAL_CALL && args->length() > 0) { |
| 2507 | RegisterAllocationScope inner_register_scope(this); |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 2508 | register_allocator()->PrepareForConsecutiveAllocations(6); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2509 | Register callee_for_eval = register_allocator()->NextConsecutiveRegister(); |
| 2510 | Register source = register_allocator()->NextConsecutiveRegister(); |
| 2511 | Register function = register_allocator()->NextConsecutiveRegister(); |
| 2512 | Register language = register_allocator()->NextConsecutiveRegister(); |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 2513 | Register eval_scope_position = |
| 2514 | register_allocator()->NextConsecutiveRegister(); |
| 2515 | Register eval_position = register_allocator()->NextConsecutiveRegister(); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2516 | |
| 2517 | // Set up arguments for ResolvePossiblyDirectEval by copying callee, source |
| 2518 | // strings and function closure, and loading language and |
| 2519 | // position. |
| 2520 | builder() |
| 2521 | ->MoveRegister(callee, callee_for_eval) |
| 2522 | .MoveRegister(arg, source) |
| 2523 | .MoveRegister(Register::function_closure(), function) |
| 2524 | .LoadLiteral(Smi::FromInt(language_mode())) |
| 2525 | .StoreAccumulatorInRegister(language) |
| 2526 | .LoadLiteral( |
| 2527 | Smi::FromInt(execution_context()->scope()->start_position())) |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 2528 | .StoreAccumulatorInRegister(eval_scope_position) |
| 2529 | .LoadLiteral(Smi::FromInt(expr->position())) |
| 2530 | .StoreAccumulatorInRegister(eval_position); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2531 | |
| 2532 | // Call ResolvePossiblyDirectEval and modify the callee. |
| 2533 | builder() |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 2534 | ->CallRuntime(Runtime::kResolvePossiblyDirectEval, callee_for_eval, 6) |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2535 | .StoreAccumulatorInRegister(callee); |
| 2536 | } |
| 2537 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 2538 | builder()->SetExpressionPosition(expr); |
| 2539 | builder()->Call(callee, receiver, 1 + args->length(), |
| 2540 | feedback_index(expr->CallFeedbackICSlot()), |
| 2541 | expr->tail_call_mode()); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2542 | execution_result()->SetResultInAccumulator(); |
| 2543 | } |
| 2544 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 2545 | void BytecodeGenerator::VisitCallSuper(Call* expr) { |
| 2546 | RegisterAllocationScope register_scope(this); |
| 2547 | SuperCallReference* super = expr->expression()->AsSuperCallReference(); |
| 2548 | |
| 2549 | // Prepare the constructor to the super call. |
| 2550 | Register this_function = register_allocator()->NewRegister(); |
| 2551 | VisitForAccumulatorValue(super->this_function_var()); |
| 2552 | builder() |
| 2553 | ->StoreAccumulatorInRegister(this_function) |
| 2554 | .CallRuntime(Runtime::kInlineGetSuperConstructor, this_function, 1); |
| 2555 | |
| 2556 | Register constructor = this_function; // Re-use dead this_function register. |
| 2557 | builder()->StoreAccumulatorInRegister(constructor); |
| 2558 | |
| 2559 | ZoneList<Expression*>* args = expr->arguments(); |
| 2560 | Register first_arg = VisitArguments(args); |
| 2561 | |
| 2562 | // The new target is loaded into the accumulator from the |
| 2563 | // {new.target} variable. |
| 2564 | VisitForAccumulatorValue(super->new_target_var()); |
| 2565 | |
| 2566 | // Call construct. |
| 2567 | builder()->SetExpressionPosition(expr); |
| 2568 | builder()->New(constructor, first_arg, args->length()); |
| 2569 | execution_result()->SetResultInAccumulator(); |
| 2570 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2571 | |
| 2572 | void BytecodeGenerator::VisitCallNew(CallNew* expr) { |
| 2573 | Register constructor = register_allocator()->NewRegister(); |
| 2574 | VisitForAccumulatorValue(expr->expression()); |
| 2575 | builder()->StoreAccumulatorInRegister(constructor); |
| 2576 | |
| 2577 | ZoneList<Expression*>* args = expr->arguments(); |
| 2578 | Register first_arg = VisitArguments(args); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 2579 | |
| 2580 | builder()->SetExpressionPosition(expr); |
| 2581 | // The accumulator holds new target which is the same as the |
| 2582 | // constructor for CallNew. |
| 2583 | builder() |
| 2584 | ->LoadAccumulatorWithRegister(constructor) |
| 2585 | .New(constructor, first_arg, args->length()); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2586 | execution_result()->SetResultInAccumulator(); |
| 2587 | } |
| 2588 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2589 | void BytecodeGenerator::VisitCallRuntime(CallRuntime* expr) { |
| 2590 | ZoneList<Expression*>* args = expr->arguments(); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2591 | if (expr->is_jsruntime()) { |
| 2592 | // Allocate a register for the receiver and load it with undefined. |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 2593 | register_allocator()->PrepareForConsecutiveAllocations(1 + args->length()); |
| 2594 | Register receiver = register_allocator()->NextConsecutiveRegister(); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2595 | builder()->LoadUndefined().StoreAccumulatorInRegister(receiver); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 2596 | Register first_arg = VisitArguments(args); |
| 2597 | CHECK(args->length() == 0 || first_arg.index() == receiver.index() + 1); |
| 2598 | builder()->CallJSRuntime(expr->context_index(), receiver, |
| 2599 | 1 + args->length()); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2600 | } else { |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 2601 | // Evaluate all arguments to the runtime call. |
| 2602 | Register first_arg = VisitArguments(args); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2603 | Runtime::FunctionId function_id = expr->function()->function_id; |
| 2604 | builder()->CallRuntime(function_id, first_arg, args->length()); |
| 2605 | } |
| 2606 | execution_result()->SetResultInAccumulator(); |
| 2607 | } |
| 2608 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2609 | void BytecodeGenerator::VisitVoid(UnaryOperation* expr) { |
| 2610 | VisitForEffect(expr->expression()); |
| 2611 | builder()->LoadUndefined(); |
| 2612 | execution_result()->SetResultInAccumulator(); |
| 2613 | } |
| 2614 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2615 | void BytecodeGenerator::VisitTypeOf(UnaryOperation* expr) { |
| 2616 | if (expr->expression()->IsVariableProxy()) { |
| 2617 | // Typeof does not throw a reference error on global variables, hence we |
| 2618 | // perform a non-contextual load in case the operand is a variable proxy. |
| 2619 | VariableProxy* proxy = expr->expression()->AsVariableProxy(); |
| 2620 | VisitVariableLoadForAccumulatorValue( |
| 2621 | proxy->var(), proxy->VariableFeedbackSlot(), INSIDE_TYPEOF); |
| 2622 | } else { |
| 2623 | VisitForAccumulatorValue(expr->expression()); |
| 2624 | } |
| 2625 | builder()->TypeOf(); |
| 2626 | execution_result()->SetResultInAccumulator(); |
| 2627 | } |
| 2628 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2629 | void BytecodeGenerator::VisitNot(UnaryOperation* expr) { |
| 2630 | VisitForAccumulatorValue(expr->expression()); |
| 2631 | builder()->LogicalNot(); |
| 2632 | execution_result()->SetResultInAccumulator(); |
| 2633 | } |
| 2634 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2635 | void BytecodeGenerator::VisitUnaryOperation(UnaryOperation* expr) { |
| 2636 | switch (expr->op()) { |
| 2637 | case Token::Value::NOT: |
| 2638 | VisitNot(expr); |
| 2639 | break; |
| 2640 | case Token::Value::TYPEOF: |
| 2641 | VisitTypeOf(expr); |
| 2642 | break; |
| 2643 | case Token::Value::VOID: |
| 2644 | VisitVoid(expr); |
| 2645 | break; |
| 2646 | case Token::Value::DELETE: |
| 2647 | VisitDelete(expr); |
| 2648 | break; |
| 2649 | case Token::Value::BIT_NOT: |
| 2650 | case Token::Value::ADD: |
| 2651 | case Token::Value::SUB: |
| 2652 | // These operators are converted to an equivalent binary operators in |
| 2653 | // the parser. These operators are not expected to be visited here. |
| 2654 | UNREACHABLE(); |
| 2655 | default: |
| 2656 | UNREACHABLE(); |
| 2657 | } |
| 2658 | } |
| 2659 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2660 | void BytecodeGenerator::VisitDelete(UnaryOperation* expr) { |
| 2661 | if (expr->expression()->IsProperty()) { |
| 2662 | // Delete of an object property is allowed both in sloppy |
| 2663 | // and strict modes. |
| 2664 | Property* property = expr->expression()->AsProperty(); |
| 2665 | Register object = VisitForRegisterValue(property->obj()); |
| 2666 | VisitForAccumulatorValue(property->key()); |
| 2667 | builder()->Delete(object, language_mode()); |
| 2668 | } else if (expr->expression()->IsVariableProxy()) { |
| 2669 | // Delete of an unqualified identifier is allowed in sloppy mode but is |
| 2670 | // not allowed in strict mode. Deleting 'this' is allowed in both modes. |
| 2671 | VariableProxy* proxy = expr->expression()->AsVariableProxy(); |
| 2672 | Variable* variable = proxy->var(); |
| 2673 | DCHECK(is_sloppy(language_mode()) || variable->HasThisName(isolate())); |
| 2674 | switch (variable->location()) { |
| 2675 | case VariableLocation::GLOBAL: |
| 2676 | case VariableLocation::UNALLOCATED: { |
| 2677 | // Global var, let, const or variables not explicitly declared. |
| 2678 | Register native_context = register_allocator()->NewRegister(); |
| 2679 | Register global_object = register_allocator()->NewRegister(); |
| 2680 | builder() |
| 2681 | ->LoadContextSlot(execution_context()->reg(), |
| 2682 | Context::NATIVE_CONTEXT_INDEX) |
| 2683 | .StoreAccumulatorInRegister(native_context) |
| 2684 | .LoadContextSlot(native_context, Context::EXTENSION_INDEX) |
| 2685 | .StoreAccumulatorInRegister(global_object) |
| 2686 | .LoadLiteral(variable->name()) |
| 2687 | .Delete(global_object, language_mode()); |
| 2688 | break; |
| 2689 | } |
| 2690 | case VariableLocation::PARAMETER: |
| 2691 | case VariableLocation::LOCAL: |
| 2692 | case VariableLocation::CONTEXT: { |
| 2693 | // Deleting local var/let/const, context variables, and arguments |
| 2694 | // does not have any effect. |
| 2695 | if (variable->HasThisName(isolate())) { |
| 2696 | builder()->LoadTrue(); |
| 2697 | } else { |
| 2698 | builder()->LoadFalse(); |
| 2699 | } |
| 2700 | break; |
| 2701 | } |
| 2702 | case VariableLocation::LOOKUP: { |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 2703 | Register name_reg = register_allocator()->NewRegister(); |
| 2704 | builder() |
| 2705 | ->LoadLiteral(variable->name()) |
| 2706 | .StoreAccumulatorInRegister(name_reg) |
| 2707 | .CallRuntime(Runtime::kDeleteLookupSlot, name_reg, 1); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2708 | break; |
| 2709 | } |
| 2710 | default: |
| 2711 | UNREACHABLE(); |
| 2712 | } |
| 2713 | } else { |
| 2714 | // Delete of an unresolvable reference returns true. |
| 2715 | VisitForEffect(expr->expression()); |
| 2716 | builder()->LoadTrue(); |
| 2717 | } |
| 2718 | execution_result()->SetResultInAccumulator(); |
| 2719 | } |
| 2720 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2721 | void BytecodeGenerator::VisitCountOperation(CountOperation* expr) { |
| 2722 | DCHECK(expr->expression()->IsValidReferenceExpressionOrThis()); |
| 2723 | |
| 2724 | // Left-hand side can only be a property, a global or a variable slot. |
| 2725 | Property* property = expr->expression()->AsProperty(); |
| 2726 | LhsKind assign_type = Property::GetAssignType(property); |
| 2727 | |
| 2728 | // TODO(rmcilroy): Set is_postfix to false if visiting for effect. |
| 2729 | bool is_postfix = expr->is_postfix(); |
| 2730 | |
| 2731 | // Evaluate LHS expression and get old value. |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 2732 | Register object, home_object, key, old_value, value; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2733 | Handle<String> name; |
| 2734 | switch (assign_type) { |
| 2735 | case VARIABLE: { |
| 2736 | VariableProxy* proxy = expr->expression()->AsVariableProxy(); |
| 2737 | VisitVariableLoadForAccumulatorValue(proxy->var(), |
| 2738 | proxy->VariableFeedbackSlot()); |
| 2739 | break; |
| 2740 | } |
| 2741 | case NAMED_PROPERTY: { |
| 2742 | FeedbackVectorSlot slot = property->PropertyFeedbackSlot(); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 2743 | object = VisitForRegisterValue(property->obj()); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2744 | name = property->key()->AsLiteral()->AsPropertyName(); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 2745 | builder()->LoadNamedProperty(object, name, feedback_index(slot)); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2746 | break; |
| 2747 | } |
| 2748 | case KEYED_PROPERTY: { |
| 2749 | FeedbackVectorSlot slot = property->PropertyFeedbackSlot(); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 2750 | object = VisitForRegisterValue(property->obj()); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2751 | // Use visit for accumulator here since we need the key in the accumulator |
| 2752 | // for the LoadKeyedProperty. |
| 2753 | key = register_allocator()->NewRegister(); |
| 2754 | VisitForAccumulatorValue(property->key()); |
| 2755 | builder()->StoreAccumulatorInRegister(key).LoadKeyedProperty( |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 2756 | object, feedback_index(slot)); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2757 | break; |
| 2758 | } |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 2759 | case NAMED_SUPER_PROPERTY: { |
| 2760 | register_allocator()->PrepareForConsecutiveAllocations(4); |
| 2761 | object = register_allocator()->NextConsecutiveRegister(); |
| 2762 | home_object = register_allocator()->NextConsecutiveRegister(); |
| 2763 | key = register_allocator()->NextConsecutiveRegister(); |
| 2764 | value = register_allocator()->NextConsecutiveRegister(); |
| 2765 | SuperPropertyReference* super_property = |
| 2766 | property->obj()->AsSuperPropertyReference(); |
| 2767 | VisitForRegisterValue(super_property->this_var(), object); |
| 2768 | VisitForRegisterValue(super_property->home_object(), home_object); |
| 2769 | builder() |
| 2770 | ->LoadLiteral(property->key()->AsLiteral()->AsPropertyName()) |
| 2771 | .StoreAccumulatorInRegister(key); |
| 2772 | BuildNamedSuperPropertyLoad(object, home_object, key); |
| 2773 | break; |
| 2774 | } |
| 2775 | case KEYED_SUPER_PROPERTY: { |
| 2776 | register_allocator()->PrepareForConsecutiveAllocations(4); |
| 2777 | object = register_allocator()->NextConsecutiveRegister(); |
| 2778 | home_object = register_allocator()->NextConsecutiveRegister(); |
| 2779 | key = register_allocator()->NextConsecutiveRegister(); |
| 2780 | value = register_allocator()->NextConsecutiveRegister(); |
| 2781 | builder()->StoreAccumulatorInRegister(value); |
| 2782 | SuperPropertyReference* super_property = |
| 2783 | property->obj()->AsSuperPropertyReference(); |
| 2784 | VisitForRegisterValue(super_property->this_var(), object); |
| 2785 | VisitForRegisterValue(super_property->home_object(), home_object); |
| 2786 | VisitForRegisterValue(property->key(), key); |
| 2787 | BuildKeyedSuperPropertyLoad(object, home_object, key); |
| 2788 | break; |
| 2789 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2790 | } |
| 2791 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2792 | // Save result for postfix expressions. |
| 2793 | if (is_postfix) { |
| 2794 | old_value = register_allocator()->outer()->NewRegister(); |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 2795 | |
| 2796 | // Convert old value into a number before saving it. |
| 2797 | builder()->CastAccumulatorToNumber().StoreAccumulatorInRegister(old_value); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2798 | } |
| 2799 | |
| 2800 | // Perform +1/-1 operation. |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 2801 | builder()->CountOperation(expr->binary_op()); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2802 | |
| 2803 | // Store the value. |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 2804 | builder()->SetExpressionPosition(expr); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2805 | FeedbackVectorSlot feedback_slot = expr->CountSlot(); |
| 2806 | switch (assign_type) { |
| 2807 | case VARIABLE: { |
| 2808 | Variable* variable = expr->expression()->AsVariableProxy()->var(); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 2809 | VisitVariableAssignment(variable, expr->op(), feedback_slot); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2810 | break; |
| 2811 | } |
| 2812 | case NAMED_PROPERTY: { |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 2813 | builder()->StoreNamedProperty(object, name, feedback_index(feedback_slot), |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2814 | language_mode()); |
| 2815 | break; |
| 2816 | } |
| 2817 | case KEYED_PROPERTY: { |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 2818 | builder()->StoreKeyedProperty(object, key, feedback_index(feedback_slot), |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2819 | language_mode()); |
| 2820 | break; |
| 2821 | } |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 2822 | case NAMED_SUPER_PROPERTY: { |
| 2823 | builder()->StoreAccumulatorInRegister(value); |
| 2824 | BuildNamedSuperPropertyStore(object, home_object, key, value); |
| 2825 | break; |
| 2826 | } |
| 2827 | case KEYED_SUPER_PROPERTY: { |
| 2828 | builder()->StoreAccumulatorInRegister(value); |
| 2829 | BuildKeyedSuperPropertyStore(object, home_object, key, value); |
| 2830 | break; |
| 2831 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2832 | } |
| 2833 | |
| 2834 | // Restore old value for postfix expressions. |
| 2835 | if (is_postfix) { |
| 2836 | execution_result()->SetResultInRegister(old_value); |
| 2837 | } else { |
| 2838 | execution_result()->SetResultInAccumulator(); |
| 2839 | } |
| 2840 | } |
| 2841 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2842 | void BytecodeGenerator::VisitBinaryOperation(BinaryOperation* binop) { |
| 2843 | switch (binop->op()) { |
| 2844 | case Token::COMMA: |
| 2845 | VisitCommaExpression(binop); |
| 2846 | break; |
| 2847 | case Token::OR: |
| 2848 | VisitLogicalOrExpression(binop); |
| 2849 | break; |
| 2850 | case Token::AND: |
| 2851 | VisitLogicalAndExpression(binop); |
| 2852 | break; |
| 2853 | default: |
| 2854 | VisitArithmeticExpression(binop); |
| 2855 | break; |
| 2856 | } |
| 2857 | } |
| 2858 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2859 | void BytecodeGenerator::VisitCompareOperation(CompareOperation* expr) { |
| 2860 | Register lhs = VisitForRegisterValue(expr->left()); |
| 2861 | VisitForAccumulatorValue(expr->right()); |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 2862 | builder()->SetExpressionPosition(expr); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 2863 | builder()->CompareOperation(expr->op(), lhs); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2864 | execution_result()->SetResultInAccumulator(); |
| 2865 | } |
| 2866 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2867 | void BytecodeGenerator::VisitArithmeticExpression(BinaryOperation* expr) { |
| 2868 | Register lhs = VisitForRegisterValue(expr->left()); |
| 2869 | VisitForAccumulatorValue(expr->right()); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 2870 | builder()->BinaryOperation(expr->op(), lhs); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2871 | execution_result()->SetResultInAccumulator(); |
| 2872 | } |
| 2873 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2874 | void BytecodeGenerator::VisitSpread(Spread* expr) { UNREACHABLE(); } |
| 2875 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2876 | void BytecodeGenerator::VisitEmptyParentheses(EmptyParentheses* expr) { |
| 2877 | UNREACHABLE(); |
| 2878 | } |
| 2879 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2880 | void BytecodeGenerator::VisitThisFunction(ThisFunction* expr) { |
| 2881 | execution_result()->SetResultInRegister(Register::function_closure()); |
| 2882 | } |
| 2883 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2884 | void BytecodeGenerator::VisitSuperCallReference(SuperCallReference* expr) { |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 2885 | // Handled by VisitCall(). |
| 2886 | UNREACHABLE(); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2887 | } |
| 2888 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2889 | void BytecodeGenerator::VisitSuperPropertyReference( |
| 2890 | SuperPropertyReference* expr) { |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 2891 | builder()->CallRuntime(Runtime::kThrowUnsupportedSuperError, Register(0), 0); |
| 2892 | execution_result()->SetResultInAccumulator(); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2893 | } |
| 2894 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2895 | void BytecodeGenerator::VisitCommaExpression(BinaryOperation* binop) { |
| 2896 | VisitForEffect(binop->left()); |
| 2897 | Visit(binop->right()); |
| 2898 | } |
| 2899 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2900 | void BytecodeGenerator::VisitLogicalOrExpression(BinaryOperation* binop) { |
| 2901 | Expression* left = binop->left(); |
| 2902 | Expression* right = binop->right(); |
| 2903 | |
| 2904 | // Short-circuit evaluation- If it is known that left is always true, |
| 2905 | // no need to visit right |
| 2906 | if (left->ToBooleanIsTrue()) { |
| 2907 | VisitForAccumulatorValue(left); |
| 2908 | } else { |
| 2909 | BytecodeLabel end_label; |
| 2910 | VisitForAccumulatorValue(left); |
| 2911 | builder()->JumpIfTrue(&end_label); |
| 2912 | VisitForAccumulatorValue(right); |
| 2913 | builder()->Bind(&end_label); |
| 2914 | } |
| 2915 | execution_result()->SetResultInAccumulator(); |
| 2916 | } |
| 2917 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2918 | void BytecodeGenerator::VisitLogicalAndExpression(BinaryOperation* binop) { |
| 2919 | Expression* left = binop->left(); |
| 2920 | Expression* right = binop->right(); |
| 2921 | |
| 2922 | // Short-circuit evaluation- If it is known that left is always false, |
| 2923 | // no need to visit right |
| 2924 | if (left->ToBooleanIsFalse()) { |
| 2925 | VisitForAccumulatorValue(left); |
| 2926 | } else { |
| 2927 | BytecodeLabel end_label; |
| 2928 | VisitForAccumulatorValue(left); |
| 2929 | builder()->JumpIfFalse(&end_label); |
| 2930 | VisitForAccumulatorValue(right); |
| 2931 | builder()->Bind(&end_label); |
| 2932 | } |
| 2933 | execution_result()->SetResultInAccumulator(); |
| 2934 | } |
| 2935 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 2936 | void BytecodeGenerator::VisitRewritableExpression(RewritableExpression* expr) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2937 | Visit(expr->expression()); |
| 2938 | } |
| 2939 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2940 | void BytecodeGenerator::VisitNewLocalFunctionContext() { |
| 2941 | AccumulatorResultScope accumulator_execution_result(this); |
| 2942 | Scope* scope = this->scope(); |
| 2943 | |
| 2944 | // Allocate a new local context. |
| 2945 | if (scope->is_script_scope()) { |
| 2946 | RegisterAllocationScope register_scope(this); |
| 2947 | Register closure = register_allocator()->NewRegister(); |
| 2948 | Register scope_info = register_allocator()->NewRegister(); |
| 2949 | DCHECK(Register::AreContiguous(closure, scope_info)); |
| 2950 | builder() |
| 2951 | ->LoadAccumulatorWithRegister(Register::function_closure()) |
| 2952 | .StoreAccumulatorInRegister(closure) |
| 2953 | .LoadLiteral(scope->GetScopeInfo(isolate())) |
| 2954 | .StoreAccumulatorInRegister(scope_info) |
| 2955 | .CallRuntime(Runtime::kNewScriptContext, closure, 2); |
| 2956 | } else { |
| 2957 | builder()->CallRuntime(Runtime::kNewFunctionContext, |
| 2958 | Register::function_closure(), 1); |
| 2959 | } |
| 2960 | execution_result()->SetResultInAccumulator(); |
| 2961 | } |
| 2962 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2963 | void BytecodeGenerator::VisitBuildLocalActivationContext() { |
| 2964 | Scope* scope = this->scope(); |
| 2965 | |
| 2966 | if (scope->has_this_declaration() && scope->receiver()->IsContextSlot()) { |
| 2967 | Variable* variable = scope->receiver(); |
| 2968 | Register receiver(builder()->Parameter(0)); |
| 2969 | // Context variable (at bottom of the context chain). |
| 2970 | DCHECK_EQ(0, scope->ContextChainLength(variable->scope())); |
| 2971 | builder()->LoadAccumulatorWithRegister(receiver).StoreContextSlot( |
| 2972 | execution_context()->reg(), variable->index()); |
| 2973 | } |
| 2974 | |
| 2975 | // Copy parameters into context if necessary. |
| 2976 | int num_parameters = scope->num_parameters(); |
| 2977 | for (int i = 0; i < num_parameters; i++) { |
| 2978 | Variable* variable = scope->parameter(i); |
| 2979 | if (!variable->IsContextSlot()) continue; |
| 2980 | |
| 2981 | // The parameter indices are shifted by 1 (receiver is variable |
| 2982 | // index -1 but is parameter index 0 in BytecodeArrayBuilder). |
| 2983 | Register parameter(builder()->Parameter(i + 1)); |
| 2984 | // Context variable (at bottom of the context chain). |
| 2985 | DCHECK_EQ(0, scope->ContextChainLength(variable->scope())); |
| 2986 | builder()->LoadAccumulatorWithRegister(parameter) |
| 2987 | .StoreContextSlot(execution_context()->reg(), variable->index()); |
| 2988 | } |
| 2989 | } |
| 2990 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2991 | void BytecodeGenerator::VisitNewLocalBlockContext(Scope* scope) { |
| 2992 | AccumulatorResultScope accumulator_execution_result(this); |
| 2993 | DCHECK(scope->is_block_scope()); |
| 2994 | |
| 2995 | // Allocate a new local block context. |
| 2996 | register_allocator()->PrepareForConsecutiveAllocations(2); |
| 2997 | Register scope_info = register_allocator()->NextConsecutiveRegister(); |
| 2998 | Register closure = register_allocator()->NextConsecutiveRegister(); |
| 2999 | |
| 3000 | builder() |
| 3001 | ->LoadLiteral(scope->GetScopeInfo(isolate())) |
| 3002 | .StoreAccumulatorInRegister(scope_info); |
| 3003 | VisitFunctionClosureForContext(); |
| 3004 | builder() |
| 3005 | ->StoreAccumulatorInRegister(closure) |
| 3006 | .CallRuntime(Runtime::kPushBlockContext, scope_info, 2); |
| 3007 | execution_result()->SetResultInAccumulator(); |
| 3008 | } |
| 3009 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 3010 | void BytecodeGenerator::VisitNewLocalWithContext() { |
| 3011 | AccumulatorResultScope accumulator_execution_result(this); |
| 3012 | |
| 3013 | register_allocator()->PrepareForConsecutiveAllocations(2); |
| 3014 | Register extension_object = register_allocator()->NextConsecutiveRegister(); |
| 3015 | Register closure = register_allocator()->NextConsecutiveRegister(); |
| 3016 | |
| 3017 | builder()->StoreAccumulatorInRegister(extension_object); |
| 3018 | VisitFunctionClosureForContext(); |
| 3019 | builder()->StoreAccumulatorInRegister(closure).CallRuntime( |
| 3020 | Runtime::kPushWithContext, extension_object, 2); |
| 3021 | execution_result()->SetResultInAccumulator(); |
| 3022 | } |
| 3023 | |
| 3024 | void BytecodeGenerator::VisitNewLocalCatchContext(Variable* variable) { |
| 3025 | AccumulatorResultScope accumulator_execution_result(this); |
| 3026 | DCHECK(variable->IsContextSlot()); |
| 3027 | |
| 3028 | // Allocate a new local block context. |
| 3029 | register_allocator()->PrepareForConsecutiveAllocations(3); |
| 3030 | Register name = register_allocator()->NextConsecutiveRegister(); |
| 3031 | Register exception = register_allocator()->NextConsecutiveRegister(); |
| 3032 | Register closure = register_allocator()->NextConsecutiveRegister(); |
| 3033 | |
| 3034 | builder() |
| 3035 | ->StoreAccumulatorInRegister(exception) |
| 3036 | .LoadLiteral(variable->name()) |
| 3037 | .StoreAccumulatorInRegister(name); |
| 3038 | VisitFunctionClosureForContext(); |
| 3039 | builder()->StoreAccumulatorInRegister(closure).CallRuntime( |
| 3040 | Runtime::kPushCatchContext, name, 3); |
| 3041 | execution_result()->SetResultInAccumulator(); |
| 3042 | } |
| 3043 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3044 | void BytecodeGenerator::VisitObjectLiteralAccessor( |
| 3045 | Register home_object, ObjectLiteralProperty* property, Register value_out) { |
| 3046 | // TODO(rmcilroy): Replace value_out with VisitForRegister(); |
| 3047 | if (property == nullptr) { |
| 3048 | builder()->LoadNull().StoreAccumulatorInRegister(value_out); |
| 3049 | } else { |
| 3050 | VisitForAccumulatorValue(property->value()); |
| 3051 | builder()->StoreAccumulatorInRegister(value_out); |
| 3052 | VisitSetHomeObject(value_out, home_object, property); |
| 3053 | } |
| 3054 | } |
| 3055 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3056 | void BytecodeGenerator::VisitSetHomeObject(Register value, Register home_object, |
| 3057 | ObjectLiteralProperty* property, |
| 3058 | int slot_number) { |
| 3059 | Expression* expr = property->value(); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 3060 | if (FunctionLiteral::NeedsHomeObject(expr)) { |
| 3061 | Handle<Name> name = isolate()->factory()->home_object_symbol(); |
| 3062 | FeedbackVectorSlot slot = property->GetSlot(slot_number); |
| 3063 | builder() |
| 3064 | ->LoadAccumulatorWithRegister(home_object) |
| 3065 | .StoreNamedProperty(value, name, feedback_index(slot), language_mode()); |
| 3066 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3067 | } |
| 3068 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3069 | void BytecodeGenerator::VisitArgumentsObject(Variable* variable) { |
| 3070 | if (variable == nullptr) return; |
| 3071 | |
| 3072 | DCHECK(variable->IsContextSlot() || variable->IsStackAllocated()); |
| 3073 | |
| 3074 | // Allocate and initialize a new arguments object and assign to the |
| 3075 | // {arguments} variable. |
| 3076 | CreateArgumentsType type = |
| 3077 | is_strict(language_mode()) || !info()->has_simple_parameters() |
| 3078 | ? CreateArgumentsType::kUnmappedArguments |
| 3079 | : CreateArgumentsType::kMappedArguments; |
| 3080 | builder()->CreateArguments(type); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 3081 | VisitVariableAssignment(variable, Token::ASSIGN, |
| 3082 | FeedbackVectorSlot::Invalid()); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3083 | } |
| 3084 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 3085 | void BytecodeGenerator::VisitRestArgumentsArray(Variable* rest) { |
| 3086 | if (rest == nullptr) return; |
| 3087 | |
| 3088 | // Allocate and initialize a new rest parameter and assign to the {rest} |
| 3089 | // variable. |
| 3090 | builder()->CreateArguments(CreateArgumentsType::kRestParameter); |
| 3091 | DCHECK(rest->IsContextSlot() || rest->IsStackAllocated()); |
| 3092 | VisitVariableAssignment(rest, Token::ASSIGN, FeedbackVectorSlot::Invalid()); |
| 3093 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3094 | |
| 3095 | void BytecodeGenerator::VisitThisFunctionVariable(Variable* variable) { |
| 3096 | if (variable == nullptr) return; |
| 3097 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3098 | // Store the closure we were called with in the given variable. |
| 3099 | builder()->LoadAccumulatorWithRegister(Register::function_closure()); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 3100 | VisitVariableAssignment(variable, Token::INIT, FeedbackVectorSlot::Invalid()); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3101 | } |
| 3102 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3103 | void BytecodeGenerator::VisitNewTargetVariable(Variable* variable) { |
| 3104 | if (variable == nullptr) return; |
| 3105 | |
| 3106 | // Store the new target we were called with in the given variable. |
| 3107 | builder()->LoadAccumulatorWithRegister(Register::new_target()); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 3108 | VisitVariableAssignment(variable, Token::INIT, FeedbackVectorSlot::Invalid()); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3109 | } |
| 3110 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3111 | void BytecodeGenerator::VisitFunctionClosureForContext() { |
| 3112 | AccumulatorResultScope accumulator_execution_result(this); |
| 3113 | Scope* closure_scope = execution_context()->scope()->ClosureScope(); |
| 3114 | if (closure_scope->is_script_scope() || |
| 3115 | closure_scope->is_module_scope()) { |
| 3116 | // Contexts nested in the native context have a canonical empty function as |
| 3117 | // their closure, not the anonymous closure containing the global code. |
| 3118 | Register native_context = register_allocator()->NewRegister(); |
| 3119 | builder() |
| 3120 | ->LoadContextSlot(execution_context()->reg(), |
| 3121 | Context::NATIVE_CONTEXT_INDEX) |
| 3122 | .StoreAccumulatorInRegister(native_context) |
| 3123 | .LoadContextSlot(native_context, Context::CLOSURE_INDEX); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 3124 | } else if (closure_scope->is_eval_scope()) { |
| 3125 | // Contexts created by a call to eval have the same closure as the |
| 3126 | // context calling eval, not the anonymous closure containing the eval |
| 3127 | // code. Fetch it from the context. |
| 3128 | builder()->LoadContextSlot(execution_context()->reg(), |
| 3129 | Context::CLOSURE_INDEX); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3130 | } else { |
| 3131 | DCHECK(closure_scope->is_function_scope()); |
| 3132 | builder()->LoadAccumulatorWithRegister(Register::function_closure()); |
| 3133 | } |
| 3134 | execution_result()->SetResultInAccumulator(); |
| 3135 | } |
| 3136 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3137 | // Visits the expression |expr| and places the result in the accumulator. |
| 3138 | void BytecodeGenerator::VisitForAccumulatorValue(Expression* expr) { |
| 3139 | AccumulatorResultScope accumulator_scope(this); |
| 3140 | Visit(expr); |
| 3141 | } |
| 3142 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 3143 | void BytecodeGenerator::VisitForAccumulatorValueOrTheHole(Expression* expr) { |
| 3144 | if (expr == nullptr) { |
| 3145 | builder()->LoadTheHole(); |
| 3146 | } else { |
| 3147 | VisitForAccumulatorValue(expr); |
| 3148 | } |
| 3149 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3150 | |
| 3151 | // Visits the expression |expr| and discards the result. |
| 3152 | void BytecodeGenerator::VisitForEffect(Expression* expr) { |
| 3153 | EffectResultScope effect_scope(this); |
| 3154 | Visit(expr); |
| 3155 | } |
| 3156 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3157 | // Visits the expression |expr| and returns the register containing |
| 3158 | // the expression result. |
| 3159 | Register BytecodeGenerator::VisitForRegisterValue(Expression* expr) { |
| 3160 | RegisterResultScope register_scope(this); |
| 3161 | Visit(expr); |
| 3162 | return register_scope.ResultRegister(); |
| 3163 | } |
| 3164 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 3165 | // Visits the expression |expr| and stores the expression result in |
| 3166 | // |destination|. |
| 3167 | void BytecodeGenerator::VisitForRegisterValue(Expression* expr, |
| 3168 | Register destination) { |
| 3169 | AccumulatorResultScope register_scope(this); |
| 3170 | Visit(expr); |
| 3171 | builder()->StoreAccumulatorInRegister(destination); |
| 3172 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3173 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 3174 | void BytecodeGenerator::VisitInScope(Statement* stmt, Scope* scope) { |
| 3175 | ContextScope context_scope(this, scope); |
| 3176 | DCHECK(scope->declarations()->is_empty()); |
| 3177 | Visit(stmt); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3178 | } |
| 3179 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3180 | LanguageMode BytecodeGenerator::language_mode() const { |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 3181 | return execution_context()->scope()->language_mode(); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3182 | } |
| 3183 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3184 | int BytecodeGenerator::feedback_index(FeedbackVectorSlot slot) const { |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 3185 | return TypeFeedbackVector::GetIndex(slot); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3186 | } |
| 3187 | |
| 3188 | } // namespace interpreter |
| 3189 | } // namespace internal |
| 3190 | } // namespace v8 |