[clang] [llvm] [AArch64][llvm] Armv9.8-A: Add support for FEAT_SVE_LRCPC (PR #231430)

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@@ -627,6 +627,10 @@ def FeatureCFLT : ExtensionWithMArch<"cflt", "CFLT", "FEAT_CFLT",
 def FeatureLSC64B : ExtensionWithMArch<"lsc64b", "LSC64B", "FEAT_LSC64B",
   "Enable Armv9.8-A Single-copy atomic 64-byte load/store consistency extension", [FeatureLSCP]>;
 
+def FeatureSVE_LRCPC: ExtensionWithMArch<"sve-lrcpc", "SVE_LRCPC", "FEAT_SVE_LRCPC",
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Lukacma wrote:

I think we should stick to existing naming convention and use just rcpc name.

https://github.com/llvm/llvm-project/pull/231430