| // Copyright 2015 the V8 project authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef V8_INTERPRETER_BYTECODE_REGISTER_ALLOCATOR_H_ |
| #define V8_INTERPRETER_BYTECODE_REGISTER_ALLOCATOR_H_ |
| |
| #include "src/zone-containers.h" |
| |
| namespace v8 { |
| namespace internal { |
| namespace interpreter { |
| |
| class BytecodeArrayBuilder; |
| class Register; |
| |
| // A class than allows the instantiator to allocate temporary registers that are |
| // cleaned up when scope is closed. |
| class BytecodeRegisterAllocator { |
| public: |
| explicit BytecodeRegisterAllocator(BytecodeArrayBuilder* builder); |
| ~BytecodeRegisterAllocator(); |
| Register NewRegister(); |
| |
| void PrepareForConsecutiveAllocations(size_t count); |
| Register NextConsecutiveRegister(); |
| |
| bool RegisterIsAllocatedInThisScope(Register reg) const; |
| |
| bool HasConsecutiveAllocations() const { return next_consecutive_count_ > 0; } |
| |
| private: |
| void* operator new(size_t size); |
| void operator delete(void* p); |
| |
| BytecodeArrayBuilder* builder_; |
| ZoneVector<int> allocated_; |
| int next_consecutive_register_; |
| int next_consecutive_count_; |
| |
| DISALLOW_COPY_AND_ASSIGN(BytecodeRegisterAllocator); |
| }; |
| |
| } // namespace interpreter |
| } // namespace internal |
| } // namespace v8 |
| |
| |
| #endif // V8_INTERPRETER_BYTECODE_REGISTER_ALLOCATOR_H_ |