[Interpreter] Basic flow control.

src/compiler/raw-machine-assembler.cc

 // Copyright 2014 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/compiler/raw-machine-assembler.h"
 
 #include "src/code-factory.h"
 #include "src/compiler/pipeline.h"
 #include "src/compiler/scheduler.h"
 
@@ skipping 140 matching lines @@
   int index = 0;
   buffer[index++] = function;
   for (int i = 0; i < param_count; i++) {
     buffer[index++] = args[i];
   }
   buffer[index++] = graph()->start();
   buffer[index++] = graph()->start();
   Node* tail_call =
       graph()->NewNode(common()->TailCall(desc), input_count, buffer);
   schedule()->AddTailCall(CurrentBlock(), tail_call);
+  current_block_ = nullptr;
   return tail_call;
 }
 
 
 Node* RawMachineAssembler::CallFunctionStub0(Node* function, Node* receiver,
                                              Node* context, Node* frame_state,
                                              CallFunctionFlags flags) {
   Callable callable = CodeFactory::CallFunction(isolate(), 0, flags);
   CallDescriptor* desc = Linkage::GetStubCallDescriptor(
       isolate(), zone(), callable.descriptor(), 1,
@@ skipping 158 matching lines @@
   DCHECK_NOT_NULL(schedule_);
   DCHECK(current_block_ != nullptr);
   Node* node = graph()->NewNode(op, input_count, inputs);
   schedule()->AddNode(CurrentBlock(), node);
   return node;
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8