[llvm] [NPM] Make few more passes required - 2 (PR #213608)

[Matt Arsenault via llvm-commits]

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@@ -17,7 +17,7 @@
 #include "llvm/IR/PassManager.h"
 
 namespace llvm {
-struct FlattenCFGPass : OptionalPassInfoMixin<FlattenCFGPass> {
+struct FlattenCFGPass : RequiredPassInfoMixin<FlattenCFGPass> {
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arsenm wrote:

Not required 

https://github.com/llvm/llvm-project/pull/213608