[clang] [clang] Separate Intel ADC instrinsics from ADX intrinsics (PR #75992)

[Phoebe Wang via cfe-commits]

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@@ -92,136 +92,11 @@ __INLINE unsigned char
 }
 #endif
 
-/* Intrinsics that are also available if __ADX__ is undefined. */
-
-/// Adds unsigned 32-bit integers \a __x and \a __y, plus 0 or 1 as indicated
-///    by the carry flag \a __cf. Stores the unsigned 32-bit sum in the memory
-///    at \a __p, and returns the 8-bit carry-out (carry flag).
-///
-/// \code{.operation}
-/// temp := (__cf == 0) ? 0 : 1
-/// Store32(__p, __x + __y + temp)
-/// result := CF
-/// \endcode
-///
-/// \headerfile <immintrin.h>
-///
-/// This intrinsic corresponds to the \c ADC instruction.
-///
-/// \param __cf
-///    The 8-bit unsigned carry flag; any non-zero value indicates carry.
-/// \param __x
-///    A 32-bit unsigned addend.
-/// \param __y
-///    A 32-bit unsigned addend.
-/// \param __p
-///    Pointer to memory for storing the sum.
-/// \returns The 8-bit unsigned carry-out value.
-__INLINE unsigned char __DEFAULT_FN_ATTRS _addcarry_u32(unsigned char __cf,
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phoebewang wrote:

`__DEFAULT_FN_ATTRS` is not used in this file, remove it or replace it with `__attribute__((__always_inline__, __nodebug__, __target__("adx")))` for the rest functions.

https://github.com/llvm/llvm-project/pull/75992