[turbofan] Support variable size argument popping in TF-generated functions

test/cctest/compiler/test-run-stubs.cc

Index: test/cctest/compiler/test-run-stubs.cc
diff --git a/test/cctest/compiler/test-run-stubs.cc b/test/cctest/compiler/test-run-stubs.cc
index b34e5d4a51c7e215bd61cb68522d2dd9f73be560..8b6519eac597731d9a4bc2c5c250efd277ea4cc9 100644
--- a/test/cctest/compiler/test-run-stubs.cc
+++ b/test/cctest/compiler/test-run-stubs.cc
@@ -47,10 +47,11 @@ TEST(RunStringLengthStub) {
   Node* vectorParam = graph.NewNode(common.Parameter(4), start);
   Node* theCode = graph.NewNode(common.HeapConstant(code));
   Node* dummyContext = graph.NewNode(common.NumberConstant(0.0));
+  Node* zero = graph.NewNode(common.Int32Constant(0));
   Node* call =
       graph.NewNode(common.Call(descriptor), theCode, receiverParam, nameParam,
                     slotParam, vectorParam, dummyContext, start, start);
-  Node* ret = graph.NewNode(common.Return(), call, call, start);
+  Node* ret = graph.NewNode(common.Return(), zero, call, call, start);
   Node* end = graph.NewNode(common.End(1), ret);
   graph.SetStart(start);
   graph.SetEnd(end);