[llvm] [VPlan] Add FinalIVValue VPInstruction. (PR #175651)

[Luke Lau via llvm-commits]

================
@@ -881,6 +881,7 @@ static void legalizeAndOptimizeInductions(VPlan &Plan) {
 /// return null.
 static VPWidenInductionRecipe *
 getOptimizableIVOf(VPValue *VPV, PredicatedScalarEvolution &PSE) {
+  match(VPV, m_FinalIVValue(m_VPValue(VPV), m_VPValue()));
----------------
lukel97 wrote:

Is there a reason why we don't just match the wide IV in optimizeLatchExitInductionUser? And does optimizeEarlyExitInductionUser need updated too

https://github.com/llvm/llvm-project/pull/175651