[llvm] [LV][EVL] Introduce MergeUntilPivot VPInstruction to enable out-loop reduction in EVL vectorization. (PR #101641)

[Florian Hahn via llvm-commits]

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@@ -661,7 +662,16 @@ Value *VPInstruction::generate(VPTransformState &State) {
     }
     return NewPhi;
   }
-
+  case VPInstruction::MergeUntilPivot: {
+    Value *Cond = State.get(getOperand(0), 0);
+    Value *OnTrue = State.get(getOperand(1), 0);
+    Value *OnFalse = State.get(getOperand(2), 0);
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fhahn wrote:

Does this still need a rebase?

https://github.com/llvm/llvm-project/pull/101641