Simplify invocation sequence at monomorphic function invocation sites.

src/hydrogen.cc

Index: src/hydrogen.cc
diff --git a/src/hydrogen.cc b/src/hydrogen.cc
index 1fac70edd9bb6e4d95dd7b3d33987994d8e51379..1b61da244825ba264193c8dd5db0dbe54536c1a9 100644
--- a/src/hydrogen.cc
+++ b/src/hydrogen.cc
@@ -6165,9 +6165,11 @@ void HGraphBuilder::VisitCall(Call* expr) {
       if (TryInlineCall(expr, true)) {   // Drop function from environment.
         return;
       } else {
-        call = PreProcessCall(new(zone()) HInvokeFunction(context,
-                                                          function,
-                                                          argument_count));
+        call = PreProcessCall(
+            new(zone()) HInvokeFunction(context,
+                                        function,
+                                        expr->target(),
+                                        argument_count));
         Drop(1);  // The function.
       }