[clang] [compiler-rt] [llvm] [X86] Support APXF to enable __builtin_cpu_supports. (PR #80636)

[Shengchen Kan via cfe-commits]

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@@ -983,6 +983,8 @@ static void getAvailableFeatures(unsigned ECX, unsigned EDX, unsigned MaxLeaf,
     setFeature(FEATURE_USERMSR);
   if (HasLeaf7Subleaf1 && ((EDX >> 19) & 1))
     setFeature(FEATURE_AVX10_1_256);
+  if (HasLeaf7Subleaf1 && ((EDX >> 21) & 1))
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KanRobert wrote:

Add SPEC sentence in your description.

https://github.com/llvm/llvm-project/pull/80636