[llvm] [VPlan] Extend getSCEVForVPV, use to compute VPReplicateRecipe cost. (PR #161276)

[Florian Hahn via llvm-commits]

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@@ -3071,23 +3071,24 @@ bool VPReplicateRecipe::shouldPack() const {
 
 /// Returns true if \p Ptr is a pointer computation for which the legacy cost
 /// model computes a SCEV expression when computing the address cost.
-static bool shouldUseAddressAccessSCEV(const VPValue *Ptr) {
+static const SCEV *getAddressAccessSCEV(const VPValue *Ptr, ScalarEvolution &SE,
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fhahn wrote:

This is to match the logic in the legacy cost model for now, as it only passes SCEV expressions through to TTI in some cases.

https://github.com/llvm/llvm-project/pull/161276