[llvm] [LoopVectorize] Add the cost of VPInstruction::AnyOf to vplan (PR #125058)

[Florian Hahn via llvm-commits]

================
@@ -7539,6 +7539,7 @@ VectorizationFactor LoopVectorizationPlanner::computeBestVF() {
                         CM.CostKind);
   precomputeCosts(BestPlan, BestFactor.Width, CostCtx);
   assert((BestFactor.Width == LegacyVF.Width ||
+          Legal->hasUncountableEarlyExit() ||
----------------
fhahn wrote:

Ideally we would be able to reliably check if a VPlan has an early exit directly on the VPlan instead of relying on Legal to do so. Could we check if we have either multiple exit blocks or a single exit block with multiple predecessors?

https://github.com/llvm/llvm-project/pull/125058