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84 lines
2.3 KiB
84 lines
2.3 KiB
// Copyright 2013 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef V8_TYPING_H_
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#define V8_TYPING_H_
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#include "src/v8.h"
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#include "src/allocation.h"
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#include "src/ast.h"
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#include "src/effects.h"
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#include "src/scopes.h"
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#include "src/type-info.h"
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#include "src/types.h"
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#include "src/zone.h"
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namespace v8 {
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namespace internal {
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class AstTyper: public AstVisitor {
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public:
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static void Run(CompilationInfo* info);
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void* operator new(size_t size, Zone* zone) { return zone->New(size); }
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void operator delete(void* pointer, Zone* zone) { }
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void operator delete(void* pointer) { }
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DEFINE_AST_VISITOR_SUBCLASS_MEMBERS();
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private:
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explicit AstTyper(CompilationInfo* info);
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Effect ObservedOnStack(Object* value);
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void ObserveTypesAtOsrEntry(IterationStatement* stmt);
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static const int kNoVar = INT_MIN;
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typedef v8::internal::Effects<int, kNoVar> Effects;
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typedef v8::internal::NestedEffects<int, kNoVar> Store;
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CompilationInfo* info_;
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TypeFeedbackOracle oracle_;
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Store store_;
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TypeFeedbackOracle* oracle() { return &oracle_; }
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void NarrowType(Expression* e, Bounds b) {
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e->set_bounds(Bounds::Both(e->bounds(), b, zone()));
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}
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void NarrowLowerType(Expression* e, Type* t) {
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e->set_bounds(Bounds::NarrowLower(e->bounds(), t, zone()));
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}
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Effects EnterEffects() {
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store_ = store_.Push();
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return store_.Top();
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}
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void ExitEffects() { store_ = store_.Pop(); }
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int parameter_index(int index) { return -index - 2; }
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int stack_local_index(int index) { return index; }
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int variable_index(Variable* var) {
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// Stack locals have the range [0 .. l]
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// Parameters have the range [-1 .. p]
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// We map this to [-p-2 .. -1, 0 .. l]
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return var->IsStackLocal() ? stack_local_index(var->index()) :
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var->IsParameter() ? parameter_index(var->index()) : kNoVar;
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}
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void VisitDeclarations(ZoneList<Declaration*>* declarations) OVERRIDE;
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void VisitStatements(ZoneList<Statement*>* statements) OVERRIDE;
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#define DECLARE_VISIT(type) virtual void Visit##type(type* node) OVERRIDE;
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AST_NODE_LIST(DECLARE_VISIT)
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#undef DECLARE_VISIT
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DISALLOW_COPY_AND_ASSIGN(AstTyper);
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};
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} } // namespace v8::internal
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#endif // V8_TYPING_H_
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