Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 1 | // Copyright 2013 the V8 project authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
| 4 | |
| 5 | #ifndef V8_TYPING_H_ |
| 6 | #define V8_TYPING_H_ |
| 7 | |
| 8 | #include "src/v8.h" |
| 9 | |
| 10 | #include "src/allocation.h" |
| 11 | #include "src/ast.h" |
| 12 | #include "src/compiler.h" |
| 13 | #include "src/effects.h" |
| 14 | #include "src/scopes.h" |
| 15 | #include "src/type-info.h" |
| 16 | #include "src/types.h" |
| 17 | #include "src/zone.h" |
| 18 | |
| 19 | namespace v8 { |
| 20 | namespace internal { |
| 21 | |
| 22 | |
| 23 | class AstTyper: public AstVisitor { |
| 24 | public: |
| 25 | static void Run(CompilationInfo* info); |
| 26 | |
| 27 | void* operator new(size_t size, Zone* zone) { |
| 28 | return zone->New(static_cast<int>(size)); |
| 29 | } |
| 30 | void operator delete(void* pointer, Zone* zone) { } |
| 31 | void operator delete(void* pointer) { } |
| 32 | |
| 33 | DEFINE_AST_VISITOR_SUBCLASS_MEMBERS(); |
| 34 | |
| 35 | private: |
| 36 | explicit AstTyper(CompilationInfo* info); |
| 37 | |
| 38 | Effect ObservedOnStack(Object* value); |
| 39 | void ObserveTypesAtOsrEntry(IterationStatement* stmt); |
| 40 | |
| 41 | static const int kNoVar = INT_MIN; |
| 42 | typedef v8::internal::Effects<int, kNoVar> Effects; |
| 43 | typedef v8::internal::NestedEffects<int, kNoVar> Store; |
| 44 | |
| 45 | CompilationInfo* info_; |
| 46 | TypeFeedbackOracle oracle_; |
| 47 | Store store_; |
| 48 | |
| 49 | TypeFeedbackOracle* oracle() { return &oracle_; } |
| 50 | |
| 51 | void NarrowType(Expression* e, Bounds b) { |
| 52 | e->set_bounds(Bounds::Both(e->bounds(), b, zone())); |
| 53 | } |
| 54 | void NarrowLowerType(Expression* e, Type* t) { |
| 55 | e->set_bounds(Bounds::NarrowLower(e->bounds(), t, zone())); |
| 56 | } |
| 57 | |
| 58 | Effects EnterEffects() { |
| 59 | store_ = store_.Push(); |
| 60 | return store_.Top(); |
| 61 | } |
| 62 | void ExitEffects() { store_ = store_.Pop(); } |
| 63 | |
| 64 | int parameter_index(int index) { return -index - 2; } |
| 65 | int stack_local_index(int index) { return index; } |
| 66 | |
| 67 | int variable_index(Variable* var) { |
| 68 | // Stack locals have the range [0 .. l] |
| 69 | // Parameters have the range [-1 .. p] |
| 70 | // We map this to [-p-2 .. -1, 0 .. l] |
| 71 | return var->IsStackLocal() ? stack_local_index(var->index()) : |
| 72 | var->IsParameter() ? parameter_index(var->index()) : kNoVar; |
| 73 | } |
| 74 | |
| 75 | void VisitDeclarations(ZoneList<Declaration*>* declarations); |
| 76 | void VisitStatements(ZoneList<Statement*>* statements); |
| 77 | |
| 78 | #define DECLARE_VISIT(type) virtual void Visit##type(type* node); |
| 79 | AST_NODE_LIST(DECLARE_VISIT) |
| 80 | #undef DECLARE_VISIT |
| 81 | |
| 82 | DISALLOW_COPY_AND_ASSIGN(AstTyper); |
| 83 | }; |
| 84 | |
| 85 | } } // namespace v8::internal |
| 86 | |
| 87 | #endif // V8_TYPING_H_ |