[llvm] [VPlan] Unroll VPReplicateRecipe by VF. (PR #142433)

[Florian Hahn via llvm-commits]

================
@@ -907,6 +907,12 @@ class VPInstruction : public VPRecipeWithIRFlags,
     BranchOnCount,
     BranchOnCond,
     Broadcast,
+    /// Creates a vector containing all operands. The vector element count
----------------
fhahn wrote:

Yep scalable vectors aren't supported, updated to say `Creates a fixed-width vector ...`, thanks

https://github.com/llvm/llvm-project/pull/142433