[interpreter] Allow verification and trace-turbo for bytecode handlers.

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"
 
 namespace v8 {
 namespace internal {
 namespace compiler {
 
 RawMachineAssembler::RawMachineAssembler(Isolate* isolate, Graph* graph,
                                          CallDescriptor* call_descriptor,
                                          MachineType word,
                                          MachineOperatorBuilder::Flags flags)
     : isolate_(isolate),
       graph_(graph),
       schedule_(new (zone()) Schedule(zone())),
       machine_(zone(), word, flags),
       common_(zone()),
       call_descriptor_(call_descriptor),
       parameters_(nullptr),
       current_block_(schedule()->start()) {
   int param_count = static_cast<int>(parameter_count());
-  Node* s = graph->NewNode(common_.Start(param_count));
+  // Add an extra input node for the JSFunction parameter to the start node.
+  Node* s = graph->NewNode(common_.Start(param_count + 1));
   graph->SetStart(s);
   if (parameter_count() == 0) return;
   parameters_ = zone()->NewArray<Node*>(param_count);
   for (size_t i = 0; i < parameter_count(); ++i) {
     parameters_[i] =
         NewNode(common()->Parameter(static_cast<int>(i)), graph->start());
   }
 }
 
 
@@ skipping 252 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