[llvm] [LLVM] Improve the DemandedBits Analysis (PR #148880)

[Yingwei Zheng via llvm-commits]

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@@ -36,6 +36,7 @@
 #include "llvm/Support/Casting.h"
 #include "llvm/Support/Debug.h"
 #include "llvm/Support/KnownBits.h"
+#include "llvm/Support/MathExtras.h"
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dtcxzyw wrote:

```suggestion
```
Unused.

https://github.com/llvm/llvm-project/pull/148880