[clang] [llvm] [AArch64] Add support for C1 CPUs (PR #171124)

[David Green via llvm-commits]

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@@ -669,6 +669,48 @@ def TuneNeoverseV3AE : SubtargetFeature<"neoversev3AE", "ARMProcFamily", "Neover
                                       FeatureAvoidLDAPUR,
                                       FeaturePredictableSelectIsExpensive]>;
 
+def TuneC1Nano : SubtargetFeature<"c1-nano", "ARMProcFamily",
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davemgreen wrote:

I would move this to follow the TuneA520AE, so as to help keep them in order.

https://github.com/llvm/llvm-project/pull/171124