[clang] [llvm] [AArch64][llvm] Add support for Permission Overlays Extension 2 (FEAT_S1POE2) (PR #164912)

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@@ -814,10 +814,12 @@ def lookupBTIByName : SearchIndex {
   let Key = ["Name"];
 }
 
+def : BTI<"r",  0b000>;
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CarolineConcatto wrote:

Can you point me where this is being changed?

https://github.com/llvm/llvm-project/pull/164912