[llvm] [LoopVectorize] Perform loop versioning for some early exit loops (PR #120603)

[Florian Hahn via llvm-commits]

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@@ -423,6 +430,19 @@ class LoopVectorizationLegality {
   unsigned getNumStores() const { return LAI->getNumStores(); }
   unsigned getNumLoads() const { return LAI->getNumLoads(); }
 
+  /// Return the number of pointers in the loop that could potentially fault in
+  /// a loop with uncountable early exits.
+  unsigned getNumPotentiallyFaultingPointers() const {
+    return PotentiallyFaultingPtrs.size();
+  }
+
+  /// Return a vector of all potentially faulting pointers in a loop with
+  /// uncountable early exits.
+  const SmallVectorImpl<std::pair<const SCEV *, Type *>> *
+  getPotentiallyFaultingPointers() const {
+    return &PotentiallyFaultingPtrs;
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fhahn wrote:

Can we just return an `ArrayRef` here, or do we need to return a pointer

https://github.com/llvm/llvm-project/pull/120603