1 files changed, 10 insertions, 3 deletions
diff --git a/llvm/lib/Target/AArch64/AArch64TargetTransformInfo.cpp b/llvm/lib/Target/AArch64/AArch64TargetTransformInfo.cpp
index fede586..655e818 100644
--- a/llvm/lib/Target/AArch64/AArch64TargetTransformInfo.cpp
+++ b/llvm/lib/Target/AArch64/AArch64TargetTransformInfo.cpp
@@ -308,9 +308,9 @@ bool AArch64TTIImpl::areInlineCompatible(const Function *Caller,
   return (EffectiveCallerBits & EffectiveCalleeBits) == EffectiveCalleeBits;
 }
 
-bool AArch64TTIImpl::areTypesABICompatible(
-    const Function *Caller, const Function *Callee,
-    const ArrayRef<Type *> &Types) const {
+bool AArch64TTIImpl::areTypesABICompatible(const Function *Caller,
+                                           const Function *Callee,
+                                           ArrayRef<Type *> Types) const {
   if (!BaseT::areTypesABICompatible(Caller, Callee, Types))
     return false;
 
@@ -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;
   }