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Side by Side Diff: src/ast/scopes.h

Issue 2262133002: Simplify Scope::AllowsLazyCompilationWithoutContext (Closed) Base URL: https://chromium.googlesource.com/v8/v8.git@master
Patch Set: Created 4 years, 3 months ago
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1 // Copyright 2012 the V8 project authors. All rights reserved. 1 // Copyright 2012 the V8 project authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be 2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file. 3 // found in the LICENSE file.
4 4
5 #ifndef V8_AST_SCOPES_H_ 5 #ifndef V8_AST_SCOPES_H_
6 #define V8_AST_SCOPES_H_ 6 #define V8_AST_SCOPES_H_
7 7
8 #include "src/ast/ast.h" 8 #include "src/ast/ast.h"
9 #include "src/base/hashmap.h" 9 #include "src/base/hashmap.h"
10 #include "src/globals.h" 10 #include "src/globals.h"
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375 375
376 // Determine if we can parse a function literal in this scope lazily. 376 // Determine if we can parse a function literal in this scope lazily.
377 bool AllowsLazyParsing() const; 377 bool AllowsLazyParsing() const;
378 378
379 // Determine if we can use lazy compilation for this scope. 379 // Determine if we can use lazy compilation for this scope.
380 bool AllowsLazyCompilation() const; 380 bool AllowsLazyCompilation() const;
381 381
382 // Determine if we can use lazy compilation for this scope without a context. 382 // Determine if we can use lazy compilation for this scope without a context.
383 bool AllowsLazyCompilationWithoutContext() const; 383 bool AllowsLazyCompilationWithoutContext() const;
384 384
385 // True if the outer context of this scope is always the native context.
386 bool HasTrivialOuterContext() const;
387
388 // The number of contexts between this and scope; zero if this == scope. 385 // The number of contexts between this and scope; zero if this == scope.
389 int ContextChainLength(Scope* scope); 386 int ContextChainLength(Scope* scope);
390 387
391 // The maximum number of nested contexts required for this scope and any inner 388 // The maximum number of nested contexts required for this scope and any inner
392 // scopes. 389 // scopes.
393 int MaxNestedContextChainLength(); 390 int MaxNestedContextChainLength();
394 391
395 // Find the first function, script, eval or (declaration) block scope. This is 392 // Find the first function, script, eval or (declaration) block scope. This is
396 // the scope where var declarations will be hoisted to in the implementation. 393 // the scope where var declarations will be hoisted to in the implementation.
397 DeclarationScope* GetDeclarationScope(); 394 DeclarationScope* GetDeclarationScope();
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586 AstNodeFactory* factory); 583 AstNodeFactory* factory);
587 void ResolveVariablesRecursively(ParseInfo* info, AstNodeFactory* factory); 584 void ResolveVariablesRecursively(ParseInfo* info, AstNodeFactory* factory);
588 585
589 // Finds free variables of this scope. This mutates the unresolved variables 586 // Finds free variables of this scope. This mutates the unresolved variables
590 // list along the way, so full resolution cannot be done afterwards. 587 // list along the way, so full resolution cannot be done afterwards.
591 // If a ParseInfo* is passed, non-free variables will be resolved. 588 // If a ParseInfo* is passed, non-free variables will be resolved.
592 VariableProxy* FetchFreeVariables(DeclarationScope* max_outer_scope, 589 VariableProxy* FetchFreeVariables(DeclarationScope* max_outer_scope,
593 ParseInfo* info = nullptr, 590 ParseInfo* info = nullptr,
594 VariableProxy* stack = nullptr); 591 VariableProxy* stack = nullptr);
595 592
596 bool InsideWithScope() const {
597 for (const Scope* scope = this; scope != nullptr;
598 scope = scope->outer_scope()) {
599 if (scope->is_with_scope()) return true;
600 }
601 return false;
602 }
603
604 // Scope analysis. 593 // Scope analysis.
605 void PropagateScopeInfo(bool outer_scope_calls_sloppy_eval); 594 void PropagateScopeInfo(bool outer_scope_calls_sloppy_eval);
606 bool HasTrivialContext() const;
607 595
608 // Predicates. 596 // Predicates.
609 bool MustAllocate(Variable* var); 597 bool MustAllocate(Variable* var);
610 bool MustAllocateInContext(Variable* var); 598 bool MustAllocateInContext(Variable* var);
611 599
612 // Variable allocation. 600 // Variable allocation.
613 void AllocateStackSlot(Variable* var); 601 void AllocateStackSlot(Variable* var);
614 void AllocateHeapSlot(Variable* var); 602 void AllocateHeapSlot(Variable* var);
615 void AllocateNonParameterLocal(Variable* var); 603 void AllocateNonParameterLocal(Variable* var);
616 void AllocateDeclaredGlobal(Variable* var); 604 void AllocateDeclaredGlobal(Variable* var);
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905 void AllocateModuleVariables(); 893 void AllocateModuleVariables();
906 894
907 private: 895 private:
908 ModuleDescriptor* module_descriptor_; 896 ModuleDescriptor* module_descriptor_;
909 }; 897 };
910 898
911 } // namespace internal 899 } // namespace internal
912 } // namespace v8 900 } // namespace v8
913 901
914 #endif // V8_AST_SCOPES_H_ 902 #endif // V8_AST_SCOPES_H_
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