[llvm] [VPlan] Remove unused first mask op from VPBlendRecipe. (PR #87770)

[via llvm-commits]

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@@ -1951,13 +1951,18 @@ class VPBlendRecipe : public VPSingleDefRecipe {
 
   /// Return the number of incoming values, taking into account that a single
   /// incoming value has no mask.
-  unsigned getNumIncomingValues() const { return (getNumOperands() + 1) / 2; }
+  unsigned getNumIncomingValues() const { return (getNumOperands() + 2) / 2; }
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ayalz wrote:

Original code that rounds-up a division by 2 should still be ok?

https://github.com/llvm/llvm-project/pull/87770