[llvm] [LV] Move emitTransformedIndex to VPlanRecipes (NFC) (PR #187121)

[Ramkumar Ramachandra via llvm-commits]

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@@ -2527,6 +2528,88 @@ bool VPWidenIntOrFpInductionRecipe::isCanonical() const {
          getScalarType() == getRegion()->getCanonicalIVType();
 }
 
+/// Compute the transformed value of Index at offset StartValue using step
+/// StepValue.
+/// For integer induction, returns StartValue + Index * StepValue.
+/// For pointer induction, returns StartValue[Index * StepValue].
+/// FIXME: The newly created binary instructions should contain nsw/nuw
+/// flags, which can be found from the original scalar operations.
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artagnon wrote:

This is now outdated with your revert -- I will share a better patch soon.

https://github.com/llvm/llvm-project/pull/187121