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| 1 // Copyright 2015 the V8 project authors. All rights reserved. | 1 // Copyright 2015 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/compiler/js-global-object-specialization.h" | 5 #include "src/compiler/js-global-object-specialization.h" |
| 6 | 6 |
| 7 #include "src/compilation-dependencies.h" | 7 #include "src/compilation-dependencies.h" |
| 8 #include "src/compiler/access-builder.h" | 8 #include "src/compiler/access-builder.h" |
| 9 #include "src/compiler/common-operator.h" | 9 #include "src/compiler/common-operator.h" |
| 10 #include "src/compiler/js-graph.h" | 10 #include "src/compiler/js-graph.h" |
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| 162 // Don't even bother trying to lower stores to read-only data properties. | 162 // Don't even bother trying to lower stores to read-only data properties. |
| 163 if (property_details.IsReadOnly()) return NoChange(); | 163 if (property_details.IsReadOnly()) return NoChange(); |
| 164 switch (property_details.cell_type()) { | 164 switch (property_details.cell_type()) { |
| 165 case PropertyCellType::kUndefined: { | 165 case PropertyCellType::kUndefined: { |
| 166 return NoChange(); | 166 return NoChange(); |
| 167 } | 167 } |
| 168 case PropertyCellType::kConstant: { | 168 case PropertyCellType::kConstant: { |
| 169 // Record a code dependency on the cell, and just deoptimize if the new | 169 // Record a code dependency on the cell, and just deoptimize if the new |
| 170 // value doesn't match the previous value stored inside the cell. | 170 // value doesn't match the previous value stored inside the cell. |
| 171 dependencies()->AssumePropertyCell(property_cell); | 171 dependencies()->AssumePropertyCell(property_cell); |
| 172 Node* check = | 172 Node* check = graph()->NewNode(simplified()->ReferenceEqual(), value, |
| 173 graph()->NewNode(simplified()->ReferenceEqual(Type::Tagged()), value, | 173 jsgraph()->Constant(property_cell_value)); |
| 174 jsgraph()->Constant(property_cell_value)); | |
| 175 effect = | 174 effect = |
| 176 graph()->NewNode(simplified()->CheckIf(), check, effect, control); | 175 graph()->NewNode(simplified()->CheckIf(), check, effect, control); |
| 177 break; | 176 break; |
| 178 } | 177 } |
| 179 case PropertyCellType::kConstantType: { | 178 case PropertyCellType::kConstantType: { |
| 180 // Record a code dependency on the cell, and just deoptimize if the new | 179 // Record a code dependency on the cell, and just deoptimize if the new |
| 181 // values' type doesn't match the type of the previous value in the cell. | 180 // values' type doesn't match the type of the previous value in the cell. |
| 182 dependencies()->AssumePropertyCell(property_cell); | 181 dependencies()->AssumePropertyCell(property_cell); |
| 183 Type* property_cell_value_type; | 182 Type* property_cell_value_type; |
| 184 if (property_cell_value->IsHeapObject()) { | 183 if (property_cell_value->IsHeapObject()) { |
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| 273 } | 272 } |
| 274 | 273 |
| 275 | 274 |
| 276 SimplifiedOperatorBuilder* JSGlobalObjectSpecialization::simplified() const { | 275 SimplifiedOperatorBuilder* JSGlobalObjectSpecialization::simplified() const { |
| 277 return jsgraph()->simplified(); | 276 return jsgraph()->simplified(); |
| 278 } | 277 } |
| 279 | 278 |
| 280 } // namespace compiler | 279 } // namespace compiler |
| 281 } // namespace internal | 280 } // namespace internal |
| 282 } // namespace v8 | 281 } // namespace v8 |
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