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| 1 // Copyright 2012 the V8 project authors. All rights reserved. | 1 // Copyright 2012 the V8 project authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 #include "src/ast.h" | 5 #include "src/ast.h" |
| 6 | 6 |
| 7 #include <cmath> // For isfinite. | 7 #include <cmath> // For isfinite. |
| 8 #include "src/builtins.h" | 8 #include "src/builtins.h" |
| 9 #include "src/code-stubs.h" | 9 #include "src/code-stubs.h" |
| 10 #include "src/contexts.h" | 10 #include "src/contexts.h" |
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| 52 const VariableProxy* var_proxy = AsVariableProxy(); | 52 const VariableProxy* var_proxy = AsVariableProxy(); |
| 53 if (var_proxy == NULL) return false; | 53 if (var_proxy == NULL) return false; |
| 54 Variable* var = var_proxy->var(); | 54 Variable* var = var_proxy->var(); |
| 55 // The global identifier "undefined" is immutable. Everything | 55 // The global identifier "undefined" is immutable. Everything |
| 56 // else could be reassigned. | 56 // else could be reassigned. |
| 57 return var != NULL && var->location() == Variable::UNALLOCATED && | 57 return var != NULL && var->location() == Variable::UNALLOCATED && |
| 58 var_proxy->raw_name()->IsOneByteEqualTo("undefined"); | 58 var_proxy->raw_name()->IsOneByteEqualTo("undefined"); |
| 59 } | 59 } |
| 60 | 60 |
| 61 | 61 |
| 62 VariableProxy::VariableProxy(Zone* zone, Variable* var, int position, | 62 VariableProxy::VariableProxy(Zone* zone, Variable* var, int position) |
| 63 IdGen* id_gen) | 63 : Expression(zone, position), |
| 64 : Expression(zone, position, 0, id_gen), | |
| 65 is_this_(var->is_this()), | 64 is_this_(var->is_this()), |
| 66 is_assigned_(false), | 65 is_assigned_(false), |
| 67 is_resolved_(false), | 66 is_resolved_(false), |
| 68 variable_feedback_slot_(FeedbackVectorICSlot::Invalid()), | 67 variable_feedback_slot_(FeedbackVectorICSlot::Invalid()), |
| 69 raw_name_(var->raw_name()), | 68 raw_name_(var->raw_name()), |
| 70 interface_(var->interface()) { | 69 interface_(var->interface()) { |
| 71 BindTo(var); | 70 BindTo(var); |
| 72 } | 71 } |
| 73 | 72 |
| 74 | 73 |
| 75 VariableProxy::VariableProxy(Zone* zone, const AstRawString* name, bool is_this, | 74 VariableProxy::VariableProxy(Zone* zone, const AstRawString* name, bool is_this, |
| 76 Interface* interface, int position, IdGen* id_gen) | 75 Interface* interface, int position) |
| 77 : Expression(zone, position, 0, id_gen), | 76 : Expression(zone, position), |
| 78 is_this_(is_this), | 77 is_this_(is_this), |
| 79 is_assigned_(false), | 78 is_assigned_(false), |
| 80 is_resolved_(false), | 79 is_resolved_(false), |
| 81 variable_feedback_slot_(FeedbackVectorICSlot::Invalid()), | 80 variable_feedback_slot_(FeedbackVectorICSlot::Invalid()), |
| 82 raw_name_(name), | 81 raw_name_(name), |
| 83 interface_(interface) {} | 82 interface_(interface) {} |
| 84 | 83 |
| 85 | 84 |
| 86 void VariableProxy::BindTo(Variable* var) { | 85 void VariableProxy::BindTo(Variable* var) { |
| 87 DCHECK(!FLAG_harmony_modules || interface_->IsUnified(var->interface())); | 86 DCHECK(!FLAG_harmony_modules || interface_->IsUnified(var->interface())); |
| 88 DCHECK((is_this() && var->is_this()) || raw_name() == var->raw_name()); | 87 DCHECK((is_this() && var->is_this()) || raw_name() == var->raw_name()); |
| 89 // Ideally CONST-ness should match. However, this is very hard to achieve | 88 // Ideally CONST-ness should match. However, this is very hard to achieve |
| 90 // because we don't know the exact semantics of conflicting (const and | 89 // because we don't know the exact semantics of conflicting (const and |
| 91 // non-const) multiple variable declarations, const vars introduced via | 90 // non-const) multiple variable declarations, const vars introduced via |
| 92 // eval() etc. Const-ness and variable declarations are a complete mess | 91 // eval() etc. Const-ness and variable declarations are a complete mess |
| 93 // in JS. Sigh... | 92 // in JS. Sigh... |
| 94 set_var(var); | 93 set_var(var); |
| 95 set_is_resolved(); | 94 set_is_resolved(); |
| 96 var->set_is_used(); | 95 var->set_is_used(); |
| 97 } | 96 } |
| 98 | 97 |
| 99 | 98 |
| 100 Assignment::Assignment(Zone* zone, Token::Value op, Expression* target, | 99 Assignment::Assignment(Zone* zone, Token::Value op, Expression* target, |
| 101 Expression* value, int pos, IdGen* id_gen) | 100 Expression* value, int pos) |
| 102 : Expression(zone, pos, num_ids(), id_gen), | 101 : Expression(zone, pos), |
| 103 is_uninitialized_(false), | 102 is_uninitialized_(false), |
| 104 key_type_(ELEMENT), | 103 key_type_(ELEMENT), |
| 105 store_mode_(STANDARD_STORE), | 104 store_mode_(STANDARD_STORE), |
| 106 op_(op), | 105 op_(op), |
| 107 target_(target), | 106 target_(target), |
| 108 value_(value), | 107 value_(value), |
| 109 binary_operation_(NULL) {} | 108 binary_operation_(NULL) {} |
| 110 | 109 |
| 111 | 110 |
| 112 Token::Value Assignment::binary_op() const { | 111 Token::Value Assignment::binary_op() const { |
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| 983 RegExpTree* node = nodes->at(i); | 982 RegExpTree* node = nodes->at(i); |
| 984 int node_min_match = node->min_match(); | 983 int node_min_match = node->min_match(); |
| 985 min_match_ = IncreaseBy(min_match_, node_min_match); | 984 min_match_ = IncreaseBy(min_match_, node_min_match); |
| 986 int node_max_match = node->max_match(); | 985 int node_max_match = node->max_match(); |
| 987 max_match_ = IncreaseBy(max_match_, node_max_match); | 986 max_match_ = IncreaseBy(max_match_, node_max_match); |
| 988 } | 987 } |
| 989 } | 988 } |
| 990 | 989 |
| 991 | 990 |
| 992 CaseClause::CaseClause(Zone* zone, Expression* label, | 991 CaseClause::CaseClause(Zone* zone, Expression* label, |
| 993 ZoneList<Statement*>* statements, int pos, IdGen* id_gen) | 992 ZoneList<Statement*>* statements, int pos) |
| 994 : Expression(zone, pos, num_ids(), id_gen), | 993 : Expression(zone, pos), |
| 995 label_(label), | 994 label_(label), |
| 996 statements_(statements), | 995 statements_(statements), |
| 997 compare_type_(Type::None(zone)) {} | 996 compare_type_(Type::None(zone)) {} |
| 998 | 997 |
| 999 | 998 |
| 1000 #define REGULAR_NODE(NodeType) \ | 999 #define REGULAR_NODE(NodeType) \ |
| 1001 void AstConstructionVisitor::Visit##NodeType(NodeType* node) { \ | 1000 void AstConstructionVisitor::Visit##NodeType(NodeType* node) { \ |
| 1002 increase_node_count(); \ | 1001 increase_node_count(); \ |
| 1003 } | 1002 } |
| 1004 #define REGULAR_NODE_WITH_FEEDBACK_SLOTS(NodeType) \ | 1003 #define REGULAR_NODE_WITH_FEEDBACK_SLOTS(NodeType) \ |
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| 1145 // static | 1144 // static |
| 1146 bool Literal::Match(void* literal1, void* literal2) { | 1145 bool Literal::Match(void* literal1, void* literal2) { |
| 1147 const AstValue* x = static_cast<Literal*>(literal1)->raw_value(); | 1146 const AstValue* x = static_cast<Literal*>(literal1)->raw_value(); |
| 1148 const AstValue* y = static_cast<Literal*>(literal2)->raw_value(); | 1147 const AstValue* y = static_cast<Literal*>(literal2)->raw_value(); |
| 1149 return (x->IsString() && y->IsString() && *x->AsString() == *y->AsString()) || | 1148 return (x->IsString() && y->IsString() && *x->AsString() == *y->AsString()) || |
| 1150 (x->IsNumber() && y->IsNumber() && x->AsNumber() == y->AsNumber()); | 1149 (x->IsNumber() && y->IsNumber() && x->AsNumber() == y->AsNumber()); |
| 1151 } | 1150 } |
| 1152 | 1151 |
| 1153 | 1152 |
| 1154 } } // namespace v8::internal | 1153 } } // namespace v8::internal |
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