1 // Copyright 2013 the V8 project authors. All rights reserved. 2 // Redistribution and use in source and binary forms, with or without 3 // modification, are permitted provided that the following conditions are 4 // met: 5 // 6 // * Redistributions of source code must retain the above copyright 7 // notice, this list of conditions and the following disclaimer. 8 // * Redistributions in binary form must reproduce the above 9 // copyright notice, this list of conditions and the following 10 // disclaimer in the documentation and/or other materials provided 11 // with the distribution. 12 // * Neither the name of Google Inc. nor the names of its 13 // contributors may be used to endorse or promote products derived 14 // from this software without specific prior written permission. 15 // 16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 28 #ifndef V8_TYPING_H_ 29 #define V8_TYPING_H_ 30 31 #include "v8.h" 32 33 #include "allocation.h" 34 #include "ast.h" 35 #include "compiler.h" 36 #include "type-info.h" 37 #include "types.h" 38 #include "effects.h" 39 #include "zone.h" 40 #include "scopes.h" 41 42 namespace v8 { 43 namespace internal { 44 45 46 class AstTyper: public AstVisitor { 47 public: 48 static void Run(CompilationInfo* info); 49 50 void* operator new(size_t size, Zone* zone) { 51 return zone->New(static_cast<int>(size)); 52 } 53 void operator delete(void* pointer, Zone* zone) { } 54 void operator delete(void* pointer) { } 55 56 DEFINE_AST_VISITOR_SUBCLASS_MEMBERS(); 57 58 private: 59 explicit AstTyper(CompilationInfo* info); 60 61 static const int kNoVar = INT_MIN; 62 typedef v8::internal::Effects<int, kNoVar> Effects; 63 typedef v8::internal::NestedEffects<int, kNoVar> Store; 64 65 CompilationInfo* info_; 66 TypeFeedbackOracle oracle_; 67 Store store_; 68 69 TypeFeedbackOracle* oracle() { return &oracle_; } 70 Zone* zone() const { return info_->zone(); } 71 72 void NarrowType(Expression* e, Bounds b) { 73 e->set_bounds(Bounds::Both(e->bounds(), b, isolate_)); 74 } 75 void NarrowLowerType(Expression* e, Handle<Type> t) { 76 e->set_bounds(Bounds::NarrowLower(e->bounds(), t, isolate_)); 77 } 78 79 Effects EnterEffects() { 80 store_ = store_.Push(); 81 return store_.Top(); 82 } 83 void ExitEffects() { store_ = store_.Pop(); } 84 85 int variable_index(Variable* var) { 86 return var->IsStackLocal() ? var->index() : 87 var->IsParameter() ? -var->index() : kNoVar; 88 } 89 90 void VisitDeclarations(ZoneList<Declaration*>* declarations); 91 void VisitStatements(ZoneList<Statement*>* statements); 92 93 #define DECLARE_VISIT(type) virtual void Visit##type(type* node); 94 AST_NODE_LIST(DECLARE_VISIT) 95 #undef DECLARE_VISIT 96 97 DISALLOW_COPY_AND_ASSIGN(AstTyper); 98 }; 99 100 } } // namespace v8::internal 101 102 #endif // V8_TYPING_H_ 103
