[llvm] [VPlan] Move call widening decision to VPlan. (NFCI) (PR #195518)

[Ramkumar Ramachandra via llvm-commits]

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@@ -356,6 +364,17 @@ struct VPCostContext {
   /// Forwards to LoopVectorizationCostModel::getPredBlockCostDivisor.
   uint64_t getPredBlockCostDivisor(BasicBlock *BB) const;
 
+  /// Returns true if \p I is known to be scalarized at \p VF.
+  bool willBeScalarized(Instruction *I, ElementCount VF) const;
+
+  /// Forwards to LoopVectorizationCostModel::isMaskRequired.
+  bool isMaskRequired(Instruction *I) const;
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artagnon wrote:

Could kindly land these independently?

https://github.com/llvm/llvm-project/pull/195518