[llvm] [Analysis] Add getPredicatedExitCount to ScalarEvolution (PR #105649)

[David Sherwood via llvm-commits]

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@@ -871,6 +871,13 @@ class ScalarEvolution {
   const SCEV *getExitCount(const Loop *L, const BasicBlock *ExitingBlock,
                            ExitCountKind Kind = Exact);
 
+  /// Same as above except this uses the predicated backedge taken info and
+  /// may require predicates.
+  const SCEV *
+  getPredicatedExitCount(const Loop *L, const BasicBlock *ExitingBlock,
+                         SmallVector<const SCEVPredicate *, 4> *Predicates,
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david-arm wrote:

Done. I've also posted a NFC patch (https://github.com/llvm/llvm-project/pull/105663) to clean up the existing functions too.

https://github.com/llvm/llvm-project/pull/105649