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Issue 6529055: [Isolates] Merge crankshaft (r5922 from bleeding_edge). (Closed)
Patch Set: Win32 port Created 9 years, 10 months ago
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1 // Copyright 2010 the V8 project authors. All rights reserved. 1 // Copyright 2010 the V8 project authors. All rights reserved.
2 // Redistribution and use in source and binary forms, with or without 2 // Redistribution and use in source and binary forms, with or without
3 // modification, are permitted provided that the following conditions are 3 // modification, are permitted provided that the following conditions are
4 // met: 4 // met:
5 // 5 //
6 // * Redistributions of source code must retain the above copyright 6 // * Redistributions of source code must retain the above copyright
7 // notice, this list of conditions and the following disclaimer. 7 // notice, this list of conditions and the following disclaimer.
8 // * Redistributions in binary form must reproduce the above 8 // * Redistributions in binary form must reproduce the above
9 // copyright notice, this list of conditions and the following 9 // copyright notice, this list of conditions and the following
10 // disclaimer in the documentation and/or other materials provided 10 // disclaimer in the documentation and/or other materials provided
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98 Scope(Scope* outer_scope, Type type); 98 Scope(Scope* outer_scope, Type type);
99 99
100 virtual ~Scope() { } 100 virtual ~Scope() { }
101 101
102 // Compute top scope and allocate variables. For lazy compilation the top 102 // Compute top scope and allocate variables. For lazy compilation the top
103 // scope only contains the single lazily compiled function, so this 103 // scope only contains the single lazily compiled function, so this
104 // doesn't re-allocate variables repeatedly. 104 // doesn't re-allocate variables repeatedly.
105 static bool Analyze(CompilationInfo* info); 105 static bool Analyze(CompilationInfo* info);
106 106
107 // The scope name is only used for printing/debugging. 107 // The scope name is only used for printing/debugging.
108 void SetScopeName(Handle<String> scope_name) { scope_name_ = scope_name; } 108 void SetScopeName(Handle<String> scope_name) { scope_name_ = scope_name; }
109 109
110 virtual void Initialize(bool inside_with); 110 virtual void Initialize(bool inside_with);
111 111
112 // Called just before leaving a scope. 112 // Called just before leaving a scope.
113 virtual void Leave() { 113 virtual void Leave() {
114 // No cleanup or fixup necessary. 114 // No cleanup or fixup necessary.
115 } 115 }
116 116
117 // --------------------------------------------------------------------------- 117 // ---------------------------------------------------------------------------
118 // Declarations 118 // Declarations
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149 virtual VariableProxy* NewUnresolved(Handle<String> name, bool inside_with); 149 virtual VariableProxy* NewUnresolved(Handle<String> name, bool inside_with);
150 150
151 // Remove a unresolved variable. During parsing, an unresolved variable 151 // Remove a unresolved variable. During parsing, an unresolved variable
152 // may have been added optimistically, but then only the variable name 152 // may have been added optimistically, but then only the variable name
153 // was used (typically for labels). If the variable was not declared, the 153 // was used (typically for labels). If the variable was not declared, the
154 // addition introduced a new unresolved variable which may end up being 154 // addition introduced a new unresolved variable which may end up being
155 // allocated globally as a "ghost" variable. RemoveUnresolved removes 155 // allocated globally as a "ghost" variable. RemoveUnresolved removes
156 // such a variable again if it was added; otherwise this is a no-op. 156 // such a variable again if it was added; otherwise this is a no-op.
157 void RemoveUnresolved(VariableProxy* var); 157 void RemoveUnresolved(VariableProxy* var);
158 158
159 // Creates a new temporary variable in this scope and binds a proxy to it. 159 // Creates a new temporary variable in this scope. The name is only used
160 // The name is only used for printing and cannot be used to find the variable. 160 // for printing and cannot be used to find the variable. In particular,
161 // In particular, the only way to get hold of the temporary is by keeping the 161 // the only way to get hold of the temporary is by keeping the Variable*
162 // VariableProxy* around. 162 // around.
163 virtual VariableProxy* NewTemporary(Handle<String> name); 163 virtual Variable* NewTemporary(Handle<String> name);
164 164
165 // Adds the specific declaration node to the list of declarations in 165 // Adds the specific declaration node to the list of declarations in
166 // this scope. The declarations are processed as part of entering 166 // this scope. The declarations are processed as part of entering
167 // the scope; see codegen.cc:ProcessDeclarations. 167 // the scope; see codegen.cc:ProcessDeclarations.
168 void AddDeclaration(Declaration* declaration); 168 void AddDeclaration(Declaration* declaration);
169 169
170 // --------------------------------------------------------------------------- 170 // ---------------------------------------------------------------------------
171 // Illegal redeclaration support. 171 // Illegal redeclaration support.
172 172
173 // Set an expression node that will be executed when the scope is 173 // Set an expression node that will be executed when the scope is
174 // entered. We only keep track of one illegal redeclaration node per 174 // entered. We only keep track of one illegal redeclaration node per
175 // scope - the first one - so if you try to set it multiple times 175 // scope - the first one - so if you try to set it multiple times
176 // the additional requests will be silently ignored. 176 // the additional requests will be silently ignored.
177 void SetIllegalRedeclaration(Expression* expression); 177 void SetIllegalRedeclaration(Expression* expression);
178 178
179 // Visit the illegal redeclaration expression. Do not call if the 179 // Visit the illegal redeclaration expression. Do not call if the
180 // scope doesn't have an illegal redeclaration node. 180 // scope doesn't have an illegal redeclaration node.
181 void VisitIllegalRedeclaration(AstVisitor* visitor); 181 void VisitIllegalRedeclaration(AstVisitor* visitor);
182 182
183 // Check if the scope has (at least) one illegal redeclaration. 183 // Check if the scope has (at least) one illegal redeclaration.
184 bool HasIllegalRedeclaration() const { return illegal_redecl_ != NULL; } 184 bool HasIllegalRedeclaration() const { return illegal_redecl_ != NULL; }
185 185
186 186
187 // --------------------------------------------------------------------------- 187 // ---------------------------------------------------------------------------
188 // Scope-specific info. 188 // Scope-specific info.
189 189
190 // Inform the scope that the corresponding code contains a with statement. 190 // Inform the scope that the corresponding code contains a with statement.
191 void RecordWithStatement() { scope_contains_with_ = true; } 191 void RecordWithStatement() { scope_contains_with_ = true; }
192 192
193 // Inform the scope that the corresponding code contains an eval call. 193 // Inform the scope that the corresponding code contains an eval call.
194 void RecordEvalCall() { scope_calls_eval_ = true; } 194 void RecordEvalCall() { scope_calls_eval_ = true; }
195 195
196 196
197 // --------------------------------------------------------------------------- 197 // ---------------------------------------------------------------------------
198 // Predicates. 198 // Predicates.
199 199
200 // Specific scope types. 200 // Specific scope types.
201 bool is_eval_scope() const { return type_ == EVAL_SCOPE; } 201 bool is_eval_scope() const { return type_ == EVAL_SCOPE; }
202 bool is_function_scope() const { return type_ == FUNCTION_SCOPE; } 202 bool is_function_scope() const { return type_ == FUNCTION_SCOPE; }
203 bool is_global_scope() const { return type_ == GLOBAL_SCOPE; } 203 bool is_global_scope() const { return type_ == GLOBAL_SCOPE; }
204 204
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416 } 416 }
417 ASSERT(inside_with_level_ <= nesting_level_); 417 ASSERT(inside_with_level_ <= nesting_level_);
418 } 418 }
419 419
420 virtual Variable* Lookup(Handle<String> name) { return NULL; } 420 virtual Variable* Lookup(Handle<String> name) { return NULL; }
421 421
422 virtual VariableProxy* NewUnresolved(Handle<String> name, bool inside_with) { 422 virtual VariableProxy* NewUnresolved(Handle<String> name, bool inside_with) {
423 return NULL; 423 return NULL;
424 } 424 }
425 425
426 virtual VariableProxy* NewTemporary(Handle<String> name) { return NULL; } 426 virtual Variable* NewTemporary(Handle<String> name) { return NULL; }
427 427
428 virtual bool HasTrivialOuterContext() const { 428 virtual bool HasTrivialOuterContext() const {
429 return (nesting_level_ == 0 || inside_with_level_ <= 0); 429 return (nesting_level_ == 0 || inside_with_level_ <= 0);
430 } 430 }
431 431
432 private: 432 private:
433 static const int kNotInsideWith = -1; 433 static const int kNotInsideWith = -1;
434 // Number of surrounding scopes of the current scope. 434 // Number of surrounding scopes of the current scope.
435 int nesting_level_; 435 int nesting_level_;
436 // Nesting level of outermost scope that is contained in a with statement, 436 // Nesting level of outermost scope that is contained in a with statement,
437 // or kNotInsideWith if there are no with's around the current scope. 437 // or kNotInsideWith if there are no with's around the current scope.
438 int inside_with_level_; 438 int inside_with_level_;
439 }; 439 };
440 440
441 441
442 } } // namespace v8::internal 442 } } // namespace v8::internal
443 443
444 #endif // V8_SCOPES_H_ 444 #endif // V8_SCOPES_H_
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