[llvm] [VPlan] Simplify BLEND %a, %b, NOT(%m) -> BLEND %b, %a, %m. (PR #128375)

[via llvm-commits]

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@@ -851,8 +851,20 @@ static void simplifyRecipe(VPRecipeBase &R, VPTypeAnalysis &TypeInfo) {
       return;
     }
 
-    if (Blend->isNormalized())
+    if (Blend->isNormalized()) {
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ayalz wrote:

 Better placed below - after normalizing Blend if needed?

https://github.com/llvm/llvm-project/pull/128375