[llvm] [clang] [compiler-rt] [X86] Support more ISAs to enable __builtin_cpu_supports (PR #79086)

[Phoebe Wang via llvm-commits]

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@@ -139,20 +139,79 @@ enum ProcessorFeatures {
   FEATURE_AVX512BITALG,
   FEATURE_AVX512BF16,
   FEATURE_AVX512VP2INTERSECT,
+  // Below Features has many missings comparing to gcc, it's because gcc has
+  // some LLVM doesn't include, e.g. FEATURE_ABM, FEATURE_HLE, ...
+  FEATURE_3DNOW,
+  FEATURE_ADX = 40,
+  FEATURE_CLDEMOTE = 42,
+  FEATURE_CLFLUSHOPT,
+  FEATURE_CLWB,
+  FEATURE_CLZERO,
+  FEATURE_CMPXCHG16B,
+
+  FEATURE_ENQCMD = 48,
+  FEATURE_F16C,
+  FEATURE_FSGSBASE,
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phoebewang wrote:

I didn't check others, but think `FEATURE_IBT` should map tp `FeatureSHSTK` in LLVM.

https://github.com/llvm/llvm-project/pull/79086