[interpreter] Support for ES6 super keyword.

src/interpreter/bytecode-register-allocator.cc

 // 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.
 
 #include "src/interpreter/bytecode-register-allocator.h"
 
 #include "src/interpreter/bytecode-array-builder.h"
 
 namespace v8 {
 namespace internal {
@@ skipping 206 matching lines @@
 Register BytecodeRegisterAllocator::NextConsecutiveRegister() {
   DCHECK_GE(next_consecutive_register_, 0);
   DCHECK_GT(next_consecutive_count_, 0);
   base_allocator()->BorrowConsecutiveTemporaryRegister(
       next_consecutive_register_);
   allocated_.push_back(next_consecutive_register_);
   next_consecutive_count_--;
   return Register(next_consecutive_register_++);
 }
 
+void BytecodeRegisterAllocator::PrepareAndInitializeConsecutiveAllocations(
+    Register* registers, size_t count) {
+  PrepareForConsecutiveAllocations(count);
+  for (size_t i = 0; i < count; i++) {
+    registers[i] = NextConsecutiveRegister();
+  }
+}
+
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8