[llvm] [compiler-rt] [X86] Support "f16c" and "avx512fp16" for __builtin_cpu_supports (PR #78384)

[Phoebe Wang via llvm-commits]

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@@ -184,12 +185,12 @@ X86_FEATURE       (AMX_TILE,        "amx-tile")
 X86_FEATURE       (CLDEMOTE,        "cldemote")
 X86_FEATURE       (CLFLUSHOPT,      "clflushopt")
 X86_FEATURE       (CLWB,            "clwb")
+X86_FEATURE_COMPAT(F16C,            "f16c",                  38)
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phoebewang wrote:

Can we test them in clang/test?

https://github.com/llvm/llvm-project/pull/78384