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| 1 // Copyright 2006-2008 the V8 project authors. All rights reserved. | 1 // Copyright 2006-2008 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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| 35 #include "zone.h" | 35 #include "zone.h" |
| 36 | 36 |
| 37 namespace v8 { | 37 namespace v8 { |
| 38 namespace internal { | 38 namespace internal { |
| 39 | 39 |
| 40 // CompilationInfo encapsulates some information known at compile time. It | 40 // CompilationInfo encapsulates some information known at compile time. It |
| 41 // is constructed based on the resources available at compile-time. | 41 // is constructed based on the resources available at compile-time. |
| 42 class CompilationInfo BASE_EMBEDDED { | 42 class CompilationInfo BASE_EMBEDDED { |
| 43 public: | 43 public: |
| 44 // Lazy compilation of a JSFunction. | 44 // Lazy compilation of a JSFunction. |
| 45 CompilationInfo(Handle<JSFunction> closure, | 45 CompilationInfo(Handle<JSFunction> closure, int loop_nesting) |
| 46 int loop_nesting, | |
| 47 Handle<Object> receiver) | |
| 48 : closure_(closure), | 46 : closure_(closure), |
| 49 function_(NULL), | 47 function_(NULL), |
| 50 is_eval_(false), | 48 is_eval_(false), |
| 51 loop_nesting_(loop_nesting), | 49 loop_nesting_(loop_nesting) { |
| 52 receiver_(receiver) { | |
| 53 Initialize(); | |
| 54 ASSERT(!closure_.is_null() && | 50 ASSERT(!closure_.is_null() && |
| 55 shared_info_.is_null() && | 51 shared_info_.is_null() && |
| 56 script_.is_null()); | 52 script_.is_null()); |
| 57 } | 53 } |
| 58 | 54 |
| 59 // Lazy compilation based on SharedFunctionInfo. | 55 // Lazy compilation based on SharedFunctionInfo. |
| 60 explicit CompilationInfo(Handle<SharedFunctionInfo> shared_info) | 56 explicit CompilationInfo(Handle<SharedFunctionInfo> shared_info) |
| 61 : shared_info_(shared_info), | 57 : shared_info_(shared_info), |
| 62 function_(NULL), | 58 function_(NULL), |
| 63 is_eval_(false), | 59 is_eval_(false), |
| 64 loop_nesting_(0) { | 60 loop_nesting_(0) { |
| 65 Initialize(); | |
| 66 ASSERT(closure_.is_null() && | 61 ASSERT(closure_.is_null() && |
| 67 !shared_info_.is_null() && | 62 !shared_info_.is_null() && |
| 68 script_.is_null()); | 63 script_.is_null()); |
| 69 } | 64 } |
| 70 | 65 |
| 71 // Eager compilation. | 66 // Eager compilation. |
| 72 CompilationInfo(FunctionLiteral* literal, Handle<Script> script, bool is_eval) | 67 CompilationInfo(FunctionLiteral* literal, Handle<Script> script, bool is_eval) |
| 73 : script_(script), | 68 : script_(script), |
| 74 function_(literal), | 69 function_(literal), |
| 75 is_eval_(is_eval), | 70 is_eval_(is_eval), |
| 76 loop_nesting_(0) { | 71 loop_nesting_(0) { |
| 77 Initialize(); | |
| 78 ASSERT(closure_.is_null() && | 72 ASSERT(closure_.is_null() && |
| 79 shared_info_.is_null() && | 73 shared_info_.is_null() && |
| 80 !script_.is_null()); | 74 !script_.is_null()); |
| 81 } | 75 } |
| 82 | 76 |
| 83 // We can only get a JSFunction if we actually have one. | 77 // We can only get a JSFunction if we actually have one. |
| 84 Handle<JSFunction> closure() { return closure_; } | 78 Handle<JSFunction> closure() { return closure_; } |
| 85 | 79 |
| 86 // We can get a SharedFunctionInfo from a JSFunction or if we actually | 80 // We can get a SharedFunctionInfo from a JSFunction or if we actually |
| 87 // have one. | 81 // have one. |
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| 105 } | 99 } |
| 106 | 100 |
| 107 // There should always be a function literal, but it may be set after | 101 // There should always be a function literal, but it may be set after |
| 108 // construction (for lazy compilation). | 102 // construction (for lazy compilation). |
| 109 FunctionLiteral* function() { return function_; } | 103 FunctionLiteral* function() { return function_; } |
| 110 void set_function(FunctionLiteral* literal) { function_ = literal; } | 104 void set_function(FunctionLiteral* literal) { function_ = literal; } |
| 111 | 105 |
| 112 // Simple accessors. | 106 // Simple accessors. |
| 113 bool is_eval() { return is_eval_; } | 107 bool is_eval() { return is_eval_; } |
| 114 int loop_nesting() { return loop_nesting_; } | 108 int loop_nesting() { return loop_nesting_; } |
| 115 bool has_receiver() { return !receiver_.is_null(); } | |
| 116 Handle<Object> receiver() { return receiver_; } | |
| 117 | |
| 118 bool has_this_properties() { return has_this_properties_; } | |
| 119 void set_has_this_properties(bool flag) { has_this_properties_ = flag; } | |
| 120 | 109 |
| 121 bool has_global_object() { | 110 bool has_global_object() { |
| 122 return !closure().is_null() && (closure()->context()->global() != NULL); | 111 return !closure().is_null() && (closure()->context()->global() != NULL); |
| 123 } | 112 } |
| 124 | 113 |
| 125 GlobalObject* global_object() { | 114 GlobalObject* global_object() { |
| 126 return has_global_object() ? closure()->context()->global() : NULL; | 115 return has_global_object() ? closure()->context()->global() : NULL; |
| 127 } | 116 } |
| 128 | 117 |
| 129 bool has_globals() { return has_globals_; } | |
| 130 void set_has_globals(bool flag) { has_globals_ = flag; } | |
| 131 | |
| 132 // Derived accessors. | 118 // Derived accessors. |
| 133 Scope* scope() { return function()->scope(); } | 119 Scope* scope() { return function()->scope(); } |
| 134 | 120 |
| 135 private: | 121 private: |
| 136 void Initialize() { | |
| 137 has_this_properties_ = false; | |
| 138 has_globals_ = false; | |
| 139 } | |
| 140 | |
| 141 Handle<JSFunction> closure_; | 122 Handle<JSFunction> closure_; |
| 142 Handle<SharedFunctionInfo> shared_info_; | 123 Handle<SharedFunctionInfo> shared_info_; |
| 143 Handle<Script> script_; | 124 Handle<Script> script_; |
| 144 | 125 |
| 145 FunctionLiteral* function_; | 126 FunctionLiteral* function_; |
| 146 | 127 |
| 147 bool is_eval_; | 128 bool is_eval_; |
| 148 int loop_nesting_; | 129 int loop_nesting_; |
| 149 | 130 |
| 150 Handle<Object> receiver_; | |
| 151 | |
| 152 bool has_this_properties_; | |
| 153 bool has_globals_; | |
| 154 | |
| 155 DISALLOW_COPY_AND_ASSIGN(CompilationInfo); | 131 DISALLOW_COPY_AND_ASSIGN(CompilationInfo); |
| 156 }; | 132 }; |
| 157 | 133 |
| 158 | 134 |
| 159 // The V8 compiler | 135 // The V8 compiler |
| 160 // | 136 // |
| 161 // General strategy: Source code is translated into an anonymous function w/o | 137 // General strategy: Source code is translated into an anonymous function w/o |
| 162 // parameters which then can be executed. If the source code contains other | 138 // parameters which then can be executed. If the source code contains other |
| 163 // functions, they will be compiled and allocated as part of the compilation | 139 // functions, they will be compiled and allocated as part of the compilation |
| 164 // of the source code. | 140 // of the source code. |
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| 237 FrameElement::ClearConstantList(); | 213 FrameElement::ClearConstantList(); |
| 238 Result::ClearConstantList(); | 214 Result::ClearConstantList(); |
| 239 } | 215 } |
| 240 } | 216 } |
| 241 }; | 217 }; |
| 242 | 218 |
| 243 | 219 |
| 244 } } // namespace v8::internal | 220 } } // namespace v8::internal |
| 245 | 221 |
| 246 #endif // V8_COMPILER_H_ | 222 #endif // V8_COMPILER_H_ |
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