[llvm] [LV] Vectorize conditional scalar assignments (PR #158088)

[Florian Hahn via llvm-commits]

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@@ -1128,6 +1128,8 @@ class LLVM_ABI_FOR_TEST VPInstruction : public VPRecipeWithIRFlags,
     /// Returns the value for vscale.
     VScale,
     OpsEnd = VScale,
+    /// Extracts the last active lane based on a predicate vector operand.
+    ExtractLastActive,
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fhahn wrote:

how does this compare to extract + last-active-lane? Should we lower one to the other assuming all backends can handle it reasonably well?

https://github.com/llvm/llvm-project/pull/158088