[llvm] [LV] Fix cost misaligned when gather/scatter w/ addr is uniform. (PR #157387)

[Florian Hahn via llvm-commits]

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@@ -6905,6 +6905,17 @@ static bool planContainsAdditionalSimplifications(VPlan &Plan,
       if (isa<VPPartialReductionRecipe>(&R))
         return true;
 
+      // The VPlan-based cost model can analyze if recipes are scalar
+      // recursively, but legacy cost model cannot.
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fhahn wrote:

Still pending.

https://github.com/llvm/llvm-project/pull/157387