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| 1 // Copyright 2009 the V8 project authors. All rights reserved. | 1 // Copyright 2009 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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| 41 namespace v8 { | 41 namespace v8 { |
| 42 namespace internal { | 42 namespace internal { |
| 43 | 43 |
| 44 | 44 |
| 45 class CodeGenSelector: public AstVisitor { | 45 class CodeGenSelector: public AstVisitor { |
| 46 public: | 46 public: |
| 47 enum CodeGenTag { NORMAL, FAST }; | 47 enum CodeGenTag { NORMAL, FAST }; |
| 48 | 48 |
| 49 CodeGenSelector() | 49 CodeGenSelector() |
| 50 : has_supported_syntax_(true), | 50 : has_supported_syntax_(true), |
| 51 location_(Location::Nowhere()) { | 51 location_(Location::Uninitialized()) { |
| 52 } | 52 } |
| 53 | 53 |
| 54 CodeGenTag Select(FunctionLiteral* fun); | 54 CodeGenTag Select(FunctionLiteral* fun); |
| 55 | 55 |
| 56 private: | 56 private: |
| 57 void VisitDeclarations(ZoneList<Declaration*>* decls); | 57 void VisitDeclarations(ZoneList<Declaration*>* decls); |
| 58 void VisitStatements(ZoneList<Statement*>* stmts); | 58 void VisitStatements(ZoneList<Statement*>* stmts); |
| 59 | 59 |
| 60 // Visit an expression in effect context with a desired location of | 60 // Visit an expression in effect context with a desired location of |
| 61 // nowhere. | 61 // nowhere. |
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| 507 | 507 |
| 508 void CodeGenSelector::VisitStatements(ZoneList<Statement*>* stmts) { | 508 void CodeGenSelector::VisitStatements(ZoneList<Statement*>* stmts) { |
| 509 for (int i = 0, len = stmts->length(); i < len; i++) { | 509 for (int i = 0, len = stmts->length(); i < len; i++) { |
| 510 Visit(stmts->at(i)); | 510 Visit(stmts->at(i)); |
| 511 CHECK_BAILOUT; | 511 CHECK_BAILOUT; |
| 512 } | 512 } |
| 513 } | 513 } |
| 514 | 514 |
| 515 | 515 |
| 516 void CodeGenSelector::VisitAsEffect(Expression* expr) { | 516 void CodeGenSelector::VisitAsEffect(Expression* expr) { |
| 517 if (location_.is_nowhere()) { | 517 if (location_.is_effect()) { |
| 518 Visit(expr); | 518 Visit(expr); |
| 519 } else { | 519 } else { |
| 520 Location saved = location_; | 520 Location saved = location_; |
| 521 location_ = Location::Nowhere(); | 521 location_ = Location::Effect(); |
| 522 Visit(expr); | 522 Visit(expr); |
| 523 location_ = saved; | 523 location_ = saved; |
| 524 } | 524 } |
| 525 } | 525 } |
| 526 | 526 |
| 527 | 527 |
| 528 void CodeGenSelector::VisitAsValue(Expression* expr) { | 528 void CodeGenSelector::VisitAsValue(Expression* expr) { |
| 529 if (location_.is_temporary()) { | 529 if (location_.is_value()) { |
| 530 Visit(expr); | 530 Visit(expr); |
| 531 } else { | 531 } else { |
| 532 Location saved = location_; | 532 Location saved = location_; |
| 533 location_ = Location::Temporary(); | 533 location_ = Location::Value(); |
| 534 Visit(expr); | 534 Visit(expr); |
| 535 location_ = saved; | 535 location_ = saved; |
| 536 } | 536 } |
| 537 } | 537 } |
| 538 | 538 |
| 539 | 539 |
| 540 void CodeGenSelector::VisitDeclaration(Declaration* decl) { | 540 void CodeGenSelector::VisitDeclaration(Declaration* decl) { |
| 541 Variable* var = decl->proxy()->var(); | 541 Variable* var = decl->proxy()->var(); |
| 542 if (!var->is_global() || var->mode() == Variable::CONST) { | 542 if (!var->is_global() || var->mode() == Variable::CONST) { |
| 543 BAILOUT("Non-global declaration"); | 543 BAILOUT("Non-global declaration"); |
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| 871 | 871 |
| 872 void CodeGenSelector::VisitThisFunction(ThisFunction* expr) { | 872 void CodeGenSelector::VisitThisFunction(ThisFunction* expr) { |
| 873 BAILOUT("ThisFunction"); | 873 BAILOUT("ThisFunction"); |
| 874 } | 874 } |
| 875 | 875 |
| 876 #undef BAILOUT | 876 #undef BAILOUT |
| 877 #undef CHECK_BAILOUT | 877 #undef CHECK_BAILOUT |
| 878 | 878 |
| 879 | 879 |
| 880 } } // namespace v8::internal | 880 } } // namespace v8::internal |
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