[Interpreter] Fixes VisitNewLocalBlockContext to reserve consecutive registers.

src/interpreter/bytecode-generator.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-generator.h"
 
 #include "src/ast/scopes.h"
 #include "src/compiler.h"
 #include "src/interpreter/control-flow-builders.h"
 #include "src/objects.h"
@@ skipping 2056 matching lines @@
   }
 }
 
 
 void BytecodeGenerator::VisitNewLocalBlockContext(Scope* scope) {
   AccumulatorResultScope accumulator_execution_result(this);
   DCHECK(scope->is_block_scope());
 
   // Allocate a new local block context.
   TemporaryRegisterScope temporary_register_scope(builder());
-  Register scope_info = temporary_register_scope.NewRegister();
-  Register closure = temporary_register_scope.NewRegister();
-  DCHECK(Register::AreContiguous(scope_info, closure));
+  temporary_register_scope.PrepareForConsecutiveAllocations(2);
+  Register scope_info = temporary_register_scope.NextConsecutiveRegister();
+  Register closure = temporary_register_scope.NextConsecutiveRegister();
+
   builder()
       ->LoadLiteral(scope->GetScopeInfo(isolate()))
       .StoreAccumulatorInRegister(scope_info);
   VisitFunctionClosureForContext();
   builder()
       ->StoreAccumulatorInRegister(closure)
       .CallRuntime(Runtime::kPushBlockContext, scope_info, 2);
   execution_result()->SetResultInAccumulator();
 }
 
@@ skipping 126 matching lines @@
 }
 
 
 int BytecodeGenerator::feedback_index(FeedbackVectorSlot slot) const {
   return info()->feedback_vector()->GetIndex(slot);
 }
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8