[llvm] [SCEVExpander] Expand UDiv avoiding UB when in seq_min/max. (PR #92177)

[Florian Hahn via llvm-commits]

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@@ -510,9 +510,12 @@ class SCEVUMinExpr : public SCEVMinMaxExpr {
 
 /// This node is the base class for sequential/in-order min/max selections.
 /// Note that their fundamental difference from SCEVMinMaxExpr's is that they
-/// are early-returning upon reaching saturation point.
-/// I.e. given `0 umin_seq poison`, the result will be `0`,
-/// while the result of `0 umin poison` is `poison`.
+/// are early-returning
+///  * upon reaching saturation point
+///    I.e. given `0 umin_seq poison`, the result will be `0`,
+///    while the result of `0 umin poison` is `poison`.
+///  * if any operand may trigger UB, e.g. if there is an UDiv operand that may
+///    divide by 0.
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fhahn wrote:

Thanks, should be updated in https://github.com/llvm/llvm-project/pull/110824

https://github.com/llvm/llvm-project/pull/92177