[llvm] [clang] [compiler-rt] [AArch64][SME] Add support for sme-fa64 (PR #70809)

[Matthew Devereau via cfe-commits]

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@@ -1363,6 +1367,8 @@ static void __init_cpu_features_constructor(unsigned long hwcap,
     setCPUFeature(FEAT_SME_I64);
   if (hwcap2 & HWCAP2_SME_F64F64)
     setCPUFeature(FEAT_SME_F64);
+  if (hwcap2 & HWCAP2_SME_FA64)
+    setCPUFeature(FEAT_SME_FA64);
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MDevereau wrote:

Do you want me to delete the definition of `HWCAP2_SME_FA64` or are you fine with this being left in for later use?

https://github.com/llvm/llvm-project/pull/70809