[llvm] [SimplifyCFG] Add optimization for switches of powers of two (PR #70977)

[via llvm-commits]

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@@ -42,6 +43,7 @@
 #include "llvm/IR/DataLayout.h"
 #include "llvm/IR/DebugInfo.h"
 #include "llvm/IR/DerivedTypes.h"
+#include "llvm/IR/FMF.h"
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DKay7 wrote:

Sorry. I believe my language server has automatically inserted this header. In fact, this is not necessary.

https://github.com/llvm/llvm-project/pull/70977