[Interpreter] Add support for JS calls.

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 144 matching lines @@
   }
   buffer[index++] = graph()->start();
   buffer[index++] = graph()->start();
   Node* tail_call =
       graph()->NewNode(common()->TailCall(desc), input_count, buffer);
   schedule()->AddTailCall(CurrentBlock(), tail_call);
   return tail_call;
 }
 
 
+Node* RawMachineAssembler::CallVarArgs(CallDescriptor* desc, Node* function,
+                                       Node** fixed_args, Node* first_var_arg,
+                                       Node* last_var_arg) {
+  DCHECK(desc->HasVarArgs());
+  int fixed_param_count =
+      static_cast<int>(desc->GetMachineSignature()->parameter_count());
+  int input_count = fixed_param_count + 5;
+  Node** buffer = zone()->NewArray<Node*>(input_count);
+  int index = 0;
+  buffer[index++] = function;
+  for (int i = 0; i < fixed_param_count; i++) {
+    buffer[index++] = fixed_args[i];
+  }
+  buffer[index++] = first_var_arg;
+  buffer[index++] = last_var_arg;
+  buffer[index++] = graph()->start();
+  buffer[index++] = graph()->start();
+  Node* call =
+      graph()->NewNode(common()->CallVarArgs(desc), input_count, buffer);
+  schedule()->AddNode(CurrentBlock(), call);
+  return 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,
       CallDescriptor::kNeedsFrameState, Operator::kNoProperties);
   Node* stub_code = HeapConstant(callable.code());
   Node* call = graph()->NewNode(common()->Call(desc), stub_code, function,
                                 receiver, context, frame_state,
@@ skipping 137 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