[llvm] [VPlan] Model FOR extract of exit value in VPlan. (PR #93395)

[via llvm-commits]

================
@@ -137,6 +137,7 @@ bool VPRecipeBase::mayHaveSideEffects() const {
     case VPInstruction::Not:
     case VPInstruction::CalculateTripCountMinusVF:
     case VPInstruction::CanonicalIVIncrementForPart:
+    case VPInstruction::ExtractFromEnd:
----------------
ayalz wrote:

Oh, this marks ExtractFromEnd as not having side effects.

https://github.com/llvm/llvm-project/pull/93395