[llvm] [VPlan] Consider address computation cost in VPInterleaveRecipe. (PR #148808)

[David Sherwood via llvm-commits]

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@@ -3666,6 +3666,9 @@ InstructionCost VPInterleaveRecipe::computeCost(ElementCount VF,
       InsertPos->getOpcode(), WideVecTy, IG->getFactor(), Indices,
       IG->getAlign(), AS, Ctx.CostKind, getMask(), NeedsMaskForGaps);
 
+  // Add the address computation cost.
+  Cost += Ctx.TTI.getAddressComputationCost(WideVecTy);
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david-arm wrote:

Yeah, we also add the cost when calculating gathers and scatters.

https://github.com/llvm/llvm-project/pull/148808