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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 #ifndef V8_INTERPRETER_BYTECODE_REGISTER_ALLOCATOR_H_ | 5 #ifndef V8_INTERPRETER_BYTECODE_REGISTER_ALLOCATOR_H_ |
| 6 #define V8_INTERPRETER_BYTECODE_REGISTER_ALLOCATOR_H_ | 6 #define V8_INTERPRETER_BYTECODE_REGISTER_ALLOCATOR_H_ |
| 7 | 7 |
| 8 #include "src/interpreter/bytecodes.h" | 8 #include "src/interpreter/bytecodes.h" |
| 9 #include "src/zone-containers.h" | 9 #include "src/zone-containers.h" |
| 10 | 10 |
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| 58 // Allocate a temporary register. | 58 // Allocate a temporary register. |
| 59 int AllocateTemporaryRegister(); | 59 int AllocateTemporaryRegister(); |
| 60 | 60 |
| 61 ZoneSet<int> free_temporaries_; | 61 ZoneSet<int> free_temporaries_; |
| 62 int allocation_base_; | 62 int allocation_base_; |
| 63 int allocation_count_; | 63 int allocation_count_; |
| 64 | 64 |
| 65 DISALLOW_COPY_AND_ASSIGN(TemporaryRegisterAllocator); | 65 DISALLOW_COPY_AND_ASSIGN(TemporaryRegisterAllocator); |
| 66 }; | 66 }; |
| 67 | 67 |
| 68 // A class than allows the instantiator to allocate temporary registers that are | 68 // A class that allows the instantiator to allocate temporary registers that are |
| 69 // cleaned up when scope is closed. | 69 // cleaned up when scope is closed. |
| 70 class BytecodeRegisterAllocator final { | 70 class BytecodeRegisterAllocator final { |
| 71 public: | 71 public: |
| 72 explicit BytecodeRegisterAllocator(Zone* zone, | 72 explicit BytecodeRegisterAllocator(Zone* zone, |
| 73 TemporaryRegisterAllocator* allocator); | 73 TemporaryRegisterAllocator* allocator); |
| 74 ~BytecodeRegisterAllocator(); | 74 ~BytecodeRegisterAllocator(); |
| 75 Register NewRegister(); | 75 Register NewRegister(); |
| 76 | 76 |
| 77 // Ensure |count| consecutive allocations are available. | 77 // Ensure |count| consecutive allocations are available. |
| 78 void PrepareForConsecutiveAllocations(size_t count); | 78 void PrepareForConsecutiveAllocations(size_t count); |
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| 97 | 97 |
| 98 DISALLOW_COPY_AND_ASSIGN(BytecodeRegisterAllocator); | 98 DISALLOW_COPY_AND_ASSIGN(BytecodeRegisterAllocator); |
| 99 }; | 99 }; |
| 100 | 100 |
| 101 } // namespace interpreter | 101 } // namespace interpreter |
| 102 } // namespace internal | 102 } // namespace internal |
| 103 } // namespace v8 | 103 } // namespace v8 |
| 104 | 104 |
| 105 | 105 |
| 106 #endif // V8_INTERPRETER_BYTECODE_REGISTER_ALLOCATOR_H_ | 106 #endif // V8_INTERPRETER_BYTECODE_REGISTER_ALLOCATOR_H_ |
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