[interpreter] Support for ES6 super keyword.

src/interpreter/bytecode-register-allocator.h

 // 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/interpreter/bytecodes.h"
 #include "src/zone-containers.h"
 
@@ skipping 56 matching lines @@
 
 // A class than allows the instantiator to allocate temporary registers that are
 // cleaned up when scope is closed.
 class BytecodeRegisterAllocator final {
  public:
   explicit BytecodeRegisterAllocator(Zone* zone,
                                      TemporaryRegisterAllocator* allocator);
   ~BytecodeRegisterAllocator();
   Register NewRegister();
 
+  // Ensure |count| consecutive allocations are available.
   void PrepareForConsecutiveAllocations(size_t count);
+
+  // Get the next consecutive allocation after calling
+  // PrepareForConsecutiveAllocations.
   Register NextConsecutiveRegister();
 
+  // Prepare consecutive register allocations and initialize an array
+  // of registers with the allocations.
+  void PrepareAndInitializeConsecutiveAllocations(Register* registers,
+                                                  size_t count);
+
+  // Returns true if |reg| is allocated in this allocator.
   bool RegisterIsAllocatedInThisScope(Register reg) const;
 
+  // Returns true if unused consecutive allocations remain.
   bool HasConsecutiveAllocations() const { return next_consecutive_count_ > 0; }
 
  private:
   TemporaryRegisterAllocator* base_allocator() const { return base_allocator_; }
 
   TemporaryRegisterAllocator* base_allocator_;
   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_