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| 1 // Copyright 2014 the V8 project authors. All rights reserved. | 1 // Copyright 2014 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 #ifndef V8_COMPILER_REPRESENTATION_CHANGE_H_ | 5 #ifndef V8_COMPILER_REPRESENTATION_CHANGE_H_ |
| 6 #define V8_COMPILER_REPRESENTATION_CHANGE_H_ | 6 #define V8_COMPILER_REPRESENTATION_CHANGE_H_ |
| 7 | 7 |
| 8 #include "src/compiler/js-graph.h" | 8 #include "src/compiler/js-graph.h" |
| 9 #include "src/compiler/machine-operator.h" | 9 #include "src/compiler/machine-operator.h" |
| 10 #include "src/compiler/node-properties-inl.h" | 10 #include "src/compiler/node-properties-inl.h" |
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| 214 Node* GetBitRepresentationFor(Node* node, RepTypeUnion output_type) { | 214 Node* GetBitRepresentationFor(Node* node, RepTypeUnion output_type) { |
| 215 // Eagerly fold representation changes for constants. | 215 // Eagerly fold representation changes for constants. |
| 216 switch (node->opcode()) { | 216 switch (node->opcode()) { |
| 217 case IrOpcode::kInt32Constant: { | 217 case IrOpcode::kInt32Constant: { |
| 218 int32_t value = ValueOf<int32_t>(node->op()); | 218 int32_t value = ValueOf<int32_t>(node->op()); |
| 219 if (value == 0 || value == 1) return node; | 219 if (value == 0 || value == 1) return node; |
| 220 return jsgraph()->OneConstant(); // value != 0 | 220 return jsgraph()->OneConstant(); // value != 0 |
| 221 } | 221 } |
| 222 case IrOpcode::kHeapConstant: { | 222 case IrOpcode::kHeapConstant: { |
| 223 Handle<Object> handle = ValueOf<Handle<Object> >(node->op()); | 223 Handle<Object> handle = ValueOf<Handle<Object> >(node->op()); |
| 224 ASSERT(*handle == isolate()->heap()->true_value() || | 224 DCHECK(*handle == isolate()->heap()->true_value() || |
| 225 *handle == isolate()->heap()->false_value()); | 225 *handle == isolate()->heap()->false_value()); |
| 226 return jsgraph()->Int32Constant( | 226 return jsgraph()->Int32Constant( |
| 227 *handle == isolate()->heap()->true_value() ? 1 : 0); | 227 *handle == isolate()->heap()->true_value() ? 1 : 0); |
| 228 } | 228 } |
| 229 default: | 229 default: |
| 230 break; | 230 break; |
| 231 } | 231 } |
| 232 // Select the correct X -> Bit operator. | 232 // Select the correct X -> Bit operator. |
| 233 Operator* op; | 233 Operator* op; |
| 234 if (output_type & rWord32) { | 234 if (output_type & rWord32) { |
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| 372 JSGraph* jsgraph() { return jsgraph_; } | 372 JSGraph* jsgraph() { return jsgraph_; } |
| 373 Isolate* isolate() { return isolate_; } | 373 Isolate* isolate() { return isolate_; } |
| 374 SimplifiedOperatorBuilder* simplified() { return simplified_; } | 374 SimplifiedOperatorBuilder* simplified() { return simplified_; } |
| 375 MachineOperatorBuilder* machine() { return machine_; } | 375 MachineOperatorBuilder* machine() { return machine_; } |
| 376 }; | 376 }; |
| 377 } | 377 } |
| 378 } | 378 } |
| 379 } // namespace v8::internal::compiler | 379 } // namespace v8::internal::compiler |
| 380 | 380 |
| 381 #endif // V8_COMPILER_REPRESENTATION_CHANGE_H_ | 381 #endif // V8_COMPILER_REPRESENTATION_CHANGE_H_ |
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