[llvm] SCEV: return std::nullopt for invalid TC (NFC) (PR #94162)

[Ramkumar Ramachandra via llvm-commits]

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@@ -6822,8 +6822,8 @@ canFoldTermCondOfLoop(Loop *L, ScalarEvolution &SE, DominatorTree &DT,
   // the allowed cost with the loops trip count as best we can.
   const unsigned ExpansionBudget = [&]() {
     unsigned Budget = 2 * SCEVCheapExpansionBudget;
-    if (unsigned SmallTC = SE.getSmallConstantMaxTripCount(L))
-      return std::min(Budget, SmallTC);
+    if (std::optional<unsigned> SmallTC = SE.getSmallConstantMaxTripCount(L))
+      return std::min(Budget, *SmallTC);
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artagnon wrote:

Yes.

https://github.com/llvm/llvm-project/pull/94162