Index: llvm/lib/Transforms/Scalar/SCCP.cpp
===================================================================
--- llvm/lib/Transforms/Scalar/SCCP.cpp
+++ llvm/lib/Transforms/Scalar/SCCP.cpp
@@ -2052,11 +2052,9 @@
       F->removeParamAttr(A.getArgNo(), Attribute::Returned);
     for (Use &U : F->uses()) {
       CallBase *CB = dyn_cast<CallBase>(U.getUser());
-      if (!CB)
-	continue;
-      for (auto &arg : CB->args()) {
-        CB->removeParamAttr(CB->getArgOperandNo(&arg), Attribute::Returned);
-      }
+      assert(CB && "Use of zapped functions should be valid direct calls!");
+      for (Use &Arg : CB->args())
+        CB->removeParamAttr(CB->getArgOperandNo(&Arg), Attribute::Returned);
     }
   }
   // If we inferred constant or undef values for globals variables, we can