[clang] [X86][AVX10] Permit AVX512 options/features used together with AVX10 (PR #71318)

[Phoebe Wang via cfe-commits]

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@@ -15,8 +15,12 @@
 #define __AVX2INTRIN_H
 
 /* Define the default attributes for the functions in this file. */
-#define __DEFAULT_FN_ATTRS256 __attribute__((__always_inline__, __nodebug__, __target__("avx2"), __min_vector_width__(256)))
-#define __DEFAULT_FN_ATTRS128 __attribute__((__always_inline__, __nodebug__, __target__("avx2"), __min_vector_width__(128)))
+#define __DEFAULT_FN_ATTRS256                                                  \
+  __attribute__((__always_inline__, __nodebug__,                               \
+                 __target__("avx2,no-evex512"), __min_vector_width__(256)))
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phoebewang wrote:

We have defined parts AVX512 intrinsics with `no-evex512` and some of them will call into these AVX2 intrinsics.
Then we are facing a problem that we cannot call them in some cases because we didn't specify `no-evex512` for them.

https://github.com/llvm/llvm-project/pull/71318