Index: include/llvm/CodeGen/MachineFunction.h
===================================================================
--- include/llvm/CodeGen/MachineFunction.h
+++ include/llvm/CodeGen/MachineFunction.h
@@ -294,7 +294,7 @@
   bool HasInlineAsm = false;
 
   /// True if any WinCFI instruction have been emitted in this function.
-  Optional<bool> HasWinCFI;
+  bool HasWinCFI = false;
 
   /// Current high-level properties of the IR of the function (e.g. is in SSA
   /// form or whether registers have been allocated)
@@ -484,8 +484,7 @@
   }
 
   bool hasWinCFI() const {
-    assert(HasWinCFI.hasValue() && "HasWinCFI not set yet!");
-    return *HasWinCFI;
+    return HasWinCFI;
   }
   void setHasWinCFI(bool v) { HasWinCFI = v; }