[llvm] [VPlan] Optimize FindLast of (binop %IV, live-in) by sinking. (PR #183911)

[Florian Hahn via llvm-commits]

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@@ -5770,8 +5822,15 @@ void VPlanTransforms::optimizeFindIVReductions(VPlan &Plan,
       VPValue *Sentinel = Plan.getConstantInt(*SentinelVal);
       auto *Cmp = MiddleBuilder.createICmp(CmpInst::ICMP_NE, ReducedIV,
                                            Sentinel, ExitDL);
+
+      // If IV was an expression, sink the expression to the middle block.
+      VPValue *ResultVal = ReducedIV;
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fhahn wrote:

Updated thanks!

https://github.com/llvm/llvm-project/pull/183911