[llvm] [VPlan] Dispatch to multiple exit blocks via middle blocks. (PR #112138)

[David Sherwood via llvm-commits]

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@@ -1031,7 +1043,9 @@ void VPlan::execute(VPTransformState *State) {
   // VPlan execution rather than earlier during VPlan construction.
   BasicBlock *MiddleBB = State->CFG.ExitBB;
   VPBasicBlock *MiddleVPBB =
-      cast<VPBasicBlock>(getVectorLoopRegion()->getSingleSuccessor());
+      getVectorLoopRegion()->getNumSuccessors() == 1
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david-arm wrote:

One successor only.

https://github.com/llvm/llvm-project/pull/112138