1 files changed, 49 insertions, 0 deletions
diff --git a/deps/v8/src/interpreter/bytecode-register-allocator.h b/deps/v8/src/interpreter/bytecode-register-allocator.h
new file mode 100644
index 0000000000..74ab3a4272
--- /dev/null
+++ b/deps/v8/src/interpreter/bytecode-register-allocator.h
@@ -0,0 +1,49 @@
+// 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_