[turbofan] Factor out platform-independent part of InstructionSelector::VisitCall.

src/compiler/instruction-selector.h

Index: src/compiler/instruction-selector.h
diff --git a/src/compiler/instruction-selector.h b/src/compiler/instruction-selector.h
index 8b68affaf50a33b68a9912f93791186110980678..1288e9aa8953f3493ac7182e20bcabeced38cd38 100644
--- a/src/compiler/instruction-selector.h
+++ b/src/compiler/instruction-selector.h
@@ -216,6 +216,9 @@ class InstructionSelector final {
   void VisitReturn(Node* ret);
   void VisitThrow(Node* value);
 
+  void EmitPrepareArguments(NodeVector* arguments,
+                            const CallDescriptor* descriptor, Node* node);
+
   // ===========================================================================
 
   Schedule* schedule() const { return schedule_; }