[clang] [compiler-rt] [llvm] [X86] Sync multiversion features with libgcc and refactor internal feature tables (PR #168750)

[Phoebe Wang via llvm-commits]

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@@ -761,10 +764,7 @@ llvm::X86::getCpuSupportsMask(ArrayRef<StringRef> FeatureStrs) {
   std::array<uint32_t, 4> FeatureMask{};
   for (StringRef FeatureStr : FeatureStrs) {
     unsigned Feature = StringSwitch<unsigned>(FeatureStr)
-#define X86_FEATURE_COMPAT(ENUM, STR, PRIORITY)                                \
-  .Case(STR, llvm::X86::FEATURE_##ENUM)
-#define X86_MICROARCH_LEVEL(ENUM, STR, PRIORITY)                               \
-  .Case(STR, llvm::X86::FEATURE_##ENUM)
+#define X86_FEATURE_COMPAT(ENUM, STR, PRIORITY, ABI_VALUE) .Case(STR, ABI_VALUE)
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phoebewang wrote:

This makes `ENUM` useless, since we can always use `ABI_VALUE` instead. But I still like the `ENUM` for readability.

https://github.com/llvm/llvm-project/pull/168750