[llvm] [LV] Optimise users of induction variables in early exit blocks (PR #130766)

[Florian Hahn via llvm-commits]

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@@ -882,6 +882,8 @@ class VPInstruction : public VPRecipeWithIRFlags,
     // Extracts the first active lane of a vector, where the first operand is
     // the predicate, and the second operand is the vector to extract.
     ExtractFirstActive,
+    // Calculates the first active lane index of the vector predicate operand.
+    FirstActiveLane,
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fhahn wrote:

Do we need both `ExtractFirstActive` and `FirstActiveLane` or can we use FirstActiveLane with a regular extract VPInstruction?

https://github.com/llvm/llvm-project/pull/130766