diff --git a/llvm/lib/Target/AArch64/AArch64TargetTransformInfo.cpp b/llvm/lib/Target/AArch64/AArch64TargetTransformInfo.cpp
index 385ba9a..191bdab 100644
--- a/llvm/lib/Target/AArch64/AArch64TargetTransformInfo.cpp
+++ b/llvm/lib/Target/AArch64/AArch64TargetTransformInfo.cpp
@@ -737,6 +737,11 @@
   if (auto BinOpCombine = tryCombineFromSVBoolBinOp(IC, II))
     return BinOpCombine;
 
+  // Ignore converts to/from svcount_t.
+  if (isa<TargetExtType>(II.getArgOperand(0)->getType()) ||
+      isa<TargetExtType>(II.getType()))
+    return std::nullopt;
+
   SmallVector<Instruction *, 32> CandidatesForRemoval;
   Value *Cursor = II.getOperand(0), *EarliestReplacement = nullptr;