[Interpreter] Add support for JS calls.

src/compiler/raw-machine-assembler.cc

Index: src/compiler/raw-machine-assembler.cc
diff --git a/src/compiler/raw-machine-assembler.cc b/src/compiler/raw-machine-assembler.cc
index 623d5a2ed3bf84408c3d32db6184b4459bcb8c9e..f72380a318fbdb20eade8a8af6d544a240306b55 100644
--- a/src/compiler/raw-machine-assembler.cc
+++ b/src/compiler/raw-machine-assembler.cc
@@ -162,6 +162,30 @@ Node* RawMachineAssembler::TailCallN(CallDescriptor* desc, Node* function,
 }
 
 
+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) {