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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 start_position, |
| 63 : Expression(zone, position), | 63 int end_position) |
| 64 : Expression(zone, start_position), |
| 64 bit_field_(IsThisField::encode(var->is_this()) | | 65 bit_field_(IsThisField::encode(var->is_this()) | |
| 65 IsAssignedField::encode(false) | | 66 IsAssignedField::encode(false) | |
| 66 IsResolvedField::encode(false)), | 67 IsResolvedField::encode(false)), |
| 67 variable_feedback_slot_(FeedbackVectorICSlot::Invalid()), | 68 variable_feedback_slot_(FeedbackVectorICSlot::Invalid()), |
| 68 raw_name_(var->raw_name()) { | 69 raw_name_(var->raw_name()), |
| 70 end_position_(end_position) { |
| 69 BindTo(var); | 71 BindTo(var); |
| 70 } | 72 } |
| 71 | 73 |
| 72 | 74 |
| 73 VariableProxy::VariableProxy(Zone* zone, const AstRawString* name, bool is_this, | 75 VariableProxy::VariableProxy(Zone* zone, const AstRawString* name, bool is_this, |
| 74 int position) | 76 int start_position, int end_position) |
| 75 : Expression(zone, position), | 77 : Expression(zone, start_position), |
| 76 bit_field_(IsThisField::encode(is_this) | IsAssignedField::encode(false) | | 78 bit_field_(IsThisField::encode(is_this) | IsAssignedField::encode(false) | |
| 77 IsResolvedField::encode(false)), | 79 IsResolvedField::encode(false)), |
| 78 variable_feedback_slot_(FeedbackVectorICSlot::Invalid()), | 80 variable_feedback_slot_(FeedbackVectorICSlot::Invalid()), |
| 79 raw_name_(name) {} | 81 raw_name_(name), |
| 82 end_position_(end_position) {} |
| 80 | 83 |
| 81 | 84 |
| 82 void VariableProxy::BindTo(Variable* var) { | 85 void VariableProxy::BindTo(Variable* var) { |
| 83 DCHECK((is_this() && var->is_this()) || raw_name() == var->raw_name()); | 86 DCHECK((is_this() && var->is_this()) || raw_name() == var->raw_name()); |
| 84 set_var(var); | 87 set_var(var); |
| 85 set_is_resolved(); | 88 set_is_resolved(); |
| 86 var->set_is_used(); | 89 var->set_is_used(); |
| 87 } | 90 } |
| 88 | 91 |
| 89 | 92 |
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| 1009 // static | 1012 // static |
| 1010 bool Literal::Match(void* literal1, void* literal2) { | 1013 bool Literal::Match(void* literal1, void* literal2) { |
| 1011 const AstValue* x = static_cast<Literal*>(literal1)->raw_value(); | 1014 const AstValue* x = static_cast<Literal*>(literal1)->raw_value(); |
| 1012 const AstValue* y = static_cast<Literal*>(literal2)->raw_value(); | 1015 const AstValue* y = static_cast<Literal*>(literal2)->raw_value(); |
| 1013 return (x->IsString() && y->IsString() && *x->AsString() == *y->AsString()) || | 1016 return (x->IsString() && y->IsString() && *x->AsString() == *y->AsString()) || |
| 1014 (x->IsNumber() && y->IsNumber() && x->AsNumber() == y->AsNumber()); | 1017 (x->IsNumber() && y->IsNumber() && x->AsNumber() == y->AsNumber()); |
| 1015 } | 1018 } |
| 1016 | 1019 |
| 1017 | 1020 |
| 1018 } } // namespace v8::internal | 1021 } } // namespace v8::internal |
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