[llvm] [LoopVectorize] Use predicated version of getSmallConstantMaxTripCount (PR #109928)

[Florian Hahn via llvm-commits]

================
@@ -2447,6 +2451,9 @@ class PredicatedScalarEvolution {
 
   /// The symbolic backedge taken count.
   const SCEV *SymbolicMaxBackedgeCount = nullptr;
+
+  /// The constant max trip count for the loop.
+  std::optional<unsigned> SmallConstantMaxTripCount;
----------------
fhahn wrote:

```suggestion
const SCEV* SmallConstantMaxTripCount = nullptr;
```

for consistency with `BackedgeCount` and `SymbolicMaxBackedgeCount` above?

https://github.com/llvm/llvm-project/pull/109928