1 files changed, 7 insertions, 0 deletions
diff --git a/llvm/lib/Target/AArch64/AArch64TargetTransformInfo.cpp b/llvm/lib/Target/AArch64/AArch64TargetTransformInfo.cpp
index fede586..47c1ac4 100644
--- a/llvm/lib/Target/AArch64/AArch64TargetTransformInfo.cpp
+++ b/llvm/lib/Target/AArch64/AArch64TargetTransformInfo.cpp
@@ -1032,6 +1032,13 @@ AArch64TTIImpl::getIntrinsicInstrCost(const IntrinsicCostAttributes &ICA,
     }
     break;
   }
+  case Intrinsic::experimental_vector_extract_last_active:
+    if (ST->isSVEorStreamingSVEAvailable()) {
+      auto [LegalCost, _] = getTypeLegalizationCost(ICA.getArgTypes()[0]);
+      // This should turn into chained clastb instructions.
+      return LegalCost;
+    }
+    break;
   default:
     break;
   }