1 files changed, 10 insertions, 0 deletions
diff --git a/llvm/lib/Target/AArch64/AArch64TargetTransformInfo.cpp b/llvm/lib/Target/AArch64/AArch64TargetTransformInfo.cpp
index aae2fdaf5bec..a6edcf125782 100644
--- a/llvm/lib/Target/AArch64/AArch64TargetTransformInfo.cpp
+++ b/llvm/lib/Target/AArch64/AArch64TargetTransformInfo.cpp
@@ -940,6 +940,16 @@ AArch64TTIImpl::getIntrinsicInstrCost(const IntrinsicCostAttributes &ICA,
     }
     break;
   }
+  case Intrinsic::experimental_cttz_elts: {
+    EVT ArgVT = getTLI()->getValueType(DL, ICA.getArgTypes()[0]);
+    if (!getTLI()->shouldExpandCttzElements(ArgVT)) {
+      // This will consist of a SVE brkb and a cntp instruction. These
+      // typically have the same latency and half the throughput as a vector
+      // add instruction.
+      return 4;
+    }
+    break;
+  }
   default:
     break;
   }