[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",
+                                  "C1Nano", "C1-Nano ARM Processors",[
+                                  FeatureFuseAES,
+                                  FeatureFuseAdrpAdd,
+                                  FeaturePostRAScheduler,
+                                  FeatureUseWzrToVecMove,
+                                  FeatureUseFixedOverScalableIfEqualCost]>;
+
+def TuneC1Pro : SubtargetFeature<"c1-pro", "ARMProcFamily",
+                                  "C1Pro", "C1-Pro ARM Processors",[
+                                  FeatureFuseAES,
+                                  FeaturePostRAScheduler,
+                                  FeatureCmpBccFusion,
+                                  FeatureALULSLFast,
+                                  FeatureFuseAdrpAdd,
+                                  FeatureFuseCmpCSel,
+                                  FeatureFuseCmpCSet,
+                                  FeatureEnableSelectOptimize,
+                                  FeaturePredictableSelectIsExpensive]>;
+
+def TuneC1Premium : SubtargetFeature<"c1-premium", "ARMProcFamily",
+                                  "C1Premium", "C1-Premium ARM Processors",[
+                                  FeatureALULSLFast,
+                                  FeatureFuseAdrpAdd,
+                                  FeatureFuseAES,
+                                  FeaturePostRAScheduler,
+                                  FeatureEnableSelectOptimize,
+                                  FeaturePredictableSelectIsExpensive]>;
+
+def TuneC1Ultra : SubtargetFeature<"c1-ultra", "ARMProcFamily",
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davemgreen wrote:

And following on after the TuneC1Premium, I believe.

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