[clang] [llvm] [X86] Extend kCFI with a 3-bit arity indicator (PR #121070)

[Alice Ryhl via llvm-commits]

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@@ -254,6 +254,7 @@ FEATURE(is_trivially_constructible, LangOpts.CPlusPlus)
 FEATURE(is_trivially_copyable, LangOpts.CPlusPlus)
 FEATURE(is_union, LangOpts.CPlusPlus)
 FEATURE(kcfi, LangOpts.Sanitize.has(SanitizerKind::KCFI))
+FEATURE(kcfi_x86_arity, LangOpts.Sanitize.has(SanitizerKind::KCFI))
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Darksonn wrote:

I still think it would be best to support both hash types via flags to avoid limiting which compiler versions work together.

https://github.com/llvm/llvm-project/pull/121070