1 files changed, 6 insertions, 0 deletions
diff --git a/llvm/lib/Transforms/Vectorize/VPlanTransforms.cpp b/llvm/lib/Transforms/Vectorize/VPlanTransforms.cpp
index 44a7275..05a0e15 100644
--- a/llvm/lib/Transforms/Vectorize/VPlanTransforms.cpp
+++ b/llvm/lib/Transforms/Vectorize/VPlanTransforms.cpp
@@ -1141,6 +1141,12 @@ static void simplifyRecipe(VPRecipeBase &R, VPTypeAnalysis &TypeInfo) {
     return;
   }
 
+  if (auto *Phi = dyn_cast<VPFirstOrderRecurrencePHIRecipe>(Def)) {
+    if (Phi->getOperand(0) == Phi->getOperand(1))
+      Def->replaceAllUsesWith(Phi->getOperand(0));
+    return;
+  }
+
   // Some simplifications can only be applied after unrolling. Perform them
   // below.
   if (!Plan->isUnrolled())