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 42namespace v8 { 43namespace internal { 44 45 46class 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