[llvm] [SCEV] Introduce exact flag for UDiv (PR #225065)

[David Sherwood via llvm-commits]

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@@ -246,11 +246,8 @@ class SCEVCommutativeExpr : public SCEVNAryExpr {
   }
 
   /// Set flags for a non-recurrence without clearing previously set flags.
-  void setFlags(SCEVFlags Flags) {
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david-arm wrote:

Similar to my earlier comment, if this function isn't needed can it be done in a separate NFC PR?

https://github.com/llvm/llvm-project/pull/225065