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
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7 // notice, this list of conditions and the following disclaimer.
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33 #include "allocation.h"
36 #include "type-info.h"
46 class AstTyper: public AstVisitor {
48 static void Run(CompilationInfo* info);
50 void* operator new(size_t size, Zone* zone) {
51 return zone->New(static_cast<int>(size));
53 void operator delete(void* pointer, Zone* zone) { }
54 void operator delete(void* pointer) { }
56 DEFINE_AST_VISITOR_SUBCLASS_MEMBERS();
59 explicit AstTyper(CompilationInfo* info);
61 Effect ObservedOnStack(Object* value);
62 void ObserveTypesAtOsrEntry(IterationStatement* stmt);
64 static const int kNoVar = INT_MIN;
65 typedef v8::internal::Effects<int, kNoVar> Effects;
66 typedef v8::internal::NestedEffects<int, kNoVar> Store;
68 CompilationInfo* info_;
69 TypeFeedbackOracle oracle_;
72 TypeFeedbackOracle* oracle() { return &oracle_; }
73 Zone* zone() const { return info_->zone(); }
75 void NarrowType(Expression* e, Bounds b) {
76 e->set_bounds(Bounds::Both(e->bounds(), b, isolate_));
78 void NarrowLowerType(Expression* e, Handle<Type> t) {
79 e->set_bounds(Bounds::NarrowLower(e->bounds(), t, isolate_));
82 Effects EnterEffects() {
83 store_ = store_.Push();
86 void ExitEffects() { store_ = store_.Pop(); }
88 int parameter_index(int index) { return -index - 2; }
89 int stack_local_index(int index) { return index; }
91 int variable_index(Variable* var) {
92 // Stack locals have the range [0 .. l]
93 // Parameters have the range [-1 .. p]
94 // We map this to [-p-2 .. -1, 0 .. l]
95 return var->IsStackLocal() ? stack_local_index(var->index()) :
96 var->IsParameter() ? parameter_index(var->index()) : kNoVar;
99 void VisitDeclarations(ZoneList<Declaration*>* declarations);
100 void VisitStatements(ZoneList<Statement*>* statements);
102 #define DECLARE_VISIT(type) virtual void Visit##type(type* node);
103 AST_NODE_LIST(DECLARE_VISIT)
106 DISALLOW_COPY_AND_ASSIGN(AstTyper);
109 } } // namespace v8::internal
111 #endif // V8_TYPING_H_