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

[David Sherwood via llvm-commits]

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@@ -9403,6 +9419,10 @@ void LoopVectorizationPlanner::adjustRecipesForReductions(
   }
   VPBasicBlock *LatchVPBB = VectorLoopRegion->getExitingBasicBlock();
   Builder.setInsertPoint(&*LatchVPBB->begin());
+  if (!VectorLoopRegion->getSingleSuccessor())
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david-arm wrote:

Again, only one successor.

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