[Interpreter] Add support for JS calls.

src/compiler/instruction-selector-impl.h

Index: src/compiler/instruction-selector-impl.h
diff --git a/src/compiler/instruction-selector-impl.h b/src/compiler/instruction-selector-impl.h
index e22f5458697b852f59300dc5e4011298673da45e..9710bfb93f5ec9d048a781c923f14facdd1b1bfc 100644
--- a/src/compiler/instruction-selector-impl.h
+++ b/src/compiler/instruction-selector-impl.h
@@ -376,6 +376,10 @@ struct CallBuffer {
                : (frame_state_descriptor->GetTotalSize() +
                   1);  // Include deopt id.
   }
+
+  size_t non_argument_input_count() const {
+    return descriptor->HasVarArgs() ? descriptor->VarArgsInputCount() : 0;
+  }
 };
 
 }  // namespace compiler