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1 // Copyright (c) 2014, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2014, the Dart project authors. Please see the AUTHORS file |
2 // for details. All rights reserved. Use of this source code is governed by a | 2 // for details. All rights reserved. Use of this source code is governed by a |
3 // BSD-style license that can be found in the LICENSE file. | 3 // BSD-style license that can be found in the LICENSE file. |
4 | 4 |
5 #ifndef VM_AST_TRANSFORMER_H_ | 5 #ifndef VM_AST_TRANSFORMER_H_ |
6 #define VM_AST_TRANSFORMER_H_ | 6 #define VM_AST_TRANSFORMER_H_ |
7 | 7 |
8 #include "platform/assert.h" | 8 #include "platform/assert.h" |
9 #include "vm/ast.h" | 9 #include "vm/ast.h" |
10 | 10 |
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34 // t_2 = :result_param; | 34 // t_2 = :result_param; |
35 // t_3 = foo(); | 35 // t_3 = foo(); |
36 // t_4 = t_2.operator+(t_3); | 36 // t_4 = t_2.operator+(t_3); |
37 // | 37 // |
38 // and a resulting expression of a load of t_4. | 38 // and a resulting expression of a load of t_4. |
39 // | 39 // |
40 class AwaitTransformer : public AstNodeVisitor { | 40 class AwaitTransformer : public AstNodeVisitor { |
41 public: | 41 public: |
42 AwaitTransformer(SequenceNode* preamble, | 42 AwaitTransformer(SequenceNode* preamble, |
43 const Library& library, | 43 const Library& library, |
44 ParsedFunction* const parsed_function) | 44 ParsedFunction* const parsed_function, |
45 : preamble_(preamble), | 45 LocalScope* function_top); |
46 temp_cnt_(0), | |
47 library_(library), | |
48 parsed_function_(parsed_function), | |
49 isolate_(Isolate::Current()) { | |
50 // We later on save the continuation context and modify the jump counter | |
51 // from within the preamble context (in the FlowGraphBuilder). Look up the | |
52 // needed variables to get their corresponding aliases. | |
53 preamble->scope()->LookupVariable(Symbols::AwaitContextVar(), false); | |
54 preamble->scope()->LookupVariable(Symbols::AwaitJumpVar(), false); | |
55 } | |
56 | 46 |
57 #define DECLARE_VISIT(BaseName) \ | 47 #define DECLARE_VISIT(BaseName) \ |
58 virtual void Visit##BaseName##Node(BaseName##Node* node); | 48 virtual void Visit##BaseName##Node(BaseName##Node* node); |
59 | 49 |
60 FOR_EACH_NODE(DECLARE_VISIT) | 50 FOR_EACH_NODE(DECLARE_VISIT) |
61 #undef DECLARE_VISIT | 51 #undef DECLARE_VISIT |
62 | 52 |
63 AstNode* Transform(AstNode* expr); | 53 AstNode* Transform(AstNode* expr); |
64 | 54 |
65 private: | 55 private: |
66 LocalVariable* EnsureCurrentTempVar(); | 56 LocalVariable* EnsureCurrentTempVar(); |
67 LocalVariable* AddToPreambleNewTempVar(AstNode* node); | 57 LocalVariable* AddToPreambleNewTempVar(AstNode* node); |
68 ArgumentListNode* TransformArguments(ArgumentListNode* node); | 58 ArgumentListNode* TransformArguments(ArgumentListNode* node); |
69 AstNode* LazyTransform(const Token::Kind kind, | 59 AstNode* LazyTransform(const Token::Kind kind, |
70 AstNode* new_left, | 60 AstNode* new_left, |
71 AstNode* right); | 61 AstNode* right); |
| 62 LocalScope* ChainNewScope(LocalScope* parent); |
| 63 LocalVariable* GetVariableInScope(LocalScope* scope, const String& symbol); |
72 | 64 |
73 void NextTempVar() { temp_cnt_++; } | 65 void NextTempVar() { temp_cnt_++; } |
74 | 66 |
75 Isolate* isolate() const { return isolate_; } | 67 Isolate* isolate() const { return isolate_; } |
76 | 68 |
77 SequenceNode* preamble_; | 69 SequenceNode* preamble_; |
78 int32_t temp_cnt_; | 70 int32_t temp_cnt_; |
79 AstNode* result_; | 71 AstNode* result_; |
80 const Library& library_; | 72 const Library& library_; |
81 ParsedFunction* const parsed_function_; | 73 ParsedFunction* const parsed_function_; |
| 74 LocalScope* function_top_; |
82 | 75 |
83 Isolate* isolate_; | 76 Isolate* isolate_; |
84 | 77 |
85 DISALLOW_COPY_AND_ASSIGN(AwaitTransformer); | 78 DISALLOW_COPY_AND_ASSIGN(AwaitTransformer); |
86 }; | 79 }; |
87 | 80 |
88 } // namespace dart | 81 } // namespace dart |
89 | 82 |
90 #endif // VM_AST_TRANSFORMER_H_ | 83 #endif // VM_AST_TRANSFORMER_H_ |
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