[llvm] [LV] Vectorize conditional scalar assignments (PR #158088)

[Florian Hahn via llvm-commits]

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@@ -4636,6 +4640,14 @@ LoopVectorizationPlanner::selectInterleaveCount(VPlan &Plan, ElementCount VF,
       any_of(Plan.getVectorLoopRegion()->getEntryBasicBlock()->phis(),
              IsaPred<VPReductionPHIRecipe>);
 
+  // FIXME: implement interleaving for FindLast transform correctly.
+  if (any_of(make_second_range(Legal->getReductionVars()),
+             [](const RecurrenceDescriptor &RdxDesc) {
+               return RecurrenceDescriptor::isFindLastRecurrenceKind(
+                   RdxDesc.getRecurrenceKind());
+             }))
+    return 1;
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fhahn wrote:

oh right.

https://github.com/llvm/llvm-project/pull/158088