[clang] [Headers][X86] Allow integer arithmetic intrinsics to be used in constexpr (PR #152986)

[Simon Pilgrim via cfe-commits]

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@@ -24,7 +24,7 @@
                  __target__("avx512vl,avx512dq,no-evex512"),                   \
                  __min_vector_width__(256)))
 
-static __inline__ __m256i __DEFAULT_FN_ATTRS256
+static __inline__ __m256i __DEFAULT_FN_ATTRS256_CONSTEXPR
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RKSimon wrote:

This was fixed by #153363

https://github.com/llvm/llvm-project/pull/152986