[clang] [Headers] Don't use unreserved names in avx10_2bf16intrin.h (#161824)

This can cause breakage with user code that does "#define A ...".

This fixes issue #161808.

(cherry picked from commit 3c5c82d)

Author: mstorsjo

clang/lib/Headers/avx10_2bf16intrin.h

@@ -519,34 +519,34 @@ _mm_maskz_min_pbh(__mmask8 __U, __m128bh __A, __m128bh __B) {
       (__mmask8)__U, (__v8bf)_mm_min_pbh(__A, __B), (__v8bf)_mm_setzero_pbh());
 }
 
-static __inline__ int __DEFAULT_FN_ATTRS128 _mm_comieq_sbh(__m128bh A,
-                                                           __m128bh B) {
-  return __builtin_ia32_vcomisbf16eq((__v8bf)A, (__v8bf)B);
+static __inline__ int __DEFAULT_FN_ATTRS128 _mm_comieq_sbh(__m128bh __A,
+                                                           __m128bh __B) {
+  return __builtin_ia32_vcomisbf16eq((__v8bf)__A, (__v8bf)__B);
 }
 
-static __inline__ int __DEFAULT_FN_ATTRS128 _mm_comilt_sbh(__m128bh A,
-                                                           __m128bh B) {
-  return __builtin_ia32_vcomisbf16lt((__v8bf)A, (__v8bf)B);
+static __inline__ int __DEFAULT_FN_ATTRS128 _mm_comilt_sbh(__m128bh __A,
+                                                           __m128bh __B) {
+  return __builtin_ia32_vcomisbf16lt((__v8bf)__A, (__v8bf)__B);
 }
 
-static __inline__ int __DEFAULT_FN_ATTRS128 _mm_comile_sbh(__m128bh A,
-                                                           __m128bh B) {
-  return __builtin_ia32_vcomisbf16le((__v8bf)A, (__v8bf)B);
+static __inline__ int __DEFAULT_FN_ATTRS128 _mm_comile_sbh(__m128bh __A,
+                                                           __m128bh __B) {
+  return __builtin_ia32_vcomisbf16le((__v8bf)__A, (__v8bf)__B);
 }
 
-static __inline__ int __DEFAULT_FN_ATTRS128 _mm_comigt_sbh(__m128bh A,
-                                                           __m128bh B) {
-  return __builtin_ia32_vcomisbf16gt((__v8bf)A, (__v8bf)B);
+static __inline__ int __DEFAULT_FN_ATTRS128 _mm_comigt_sbh(__m128bh __A,
+                                                           __m128bh __B) {
+  return __builtin_ia32_vcomisbf16gt((__v8bf)__A, (__v8bf)__B);
 }
 
-static __inline__ int __DEFAULT_FN_ATTRS128 _mm_comige_sbh(__m128bh A,
-                                                           __m128bh B) {
-  return __builtin_ia32_vcomisbf16ge((__v8bf)A, (__v8bf)B);
+static __inline__ int __DEFAULT_FN_ATTRS128 _mm_comige_sbh(__m128bh __A,
+                                                           __m128bh __B) {
+  return __builtin_ia32_vcomisbf16ge((__v8bf)__A, (__v8bf)__B);
 }
 
-static __inline__ int __DEFAULT_FN_ATTRS128 _mm_comineq_sbh(__m128bh A,
-                                                            __m128bh B) {
-  return __builtin_ia32_vcomisbf16neq((__v8bf)A, (__v8bf)B);
+static __inline__ int __DEFAULT_FN_ATTRS128 _mm_comineq_sbh(__m128bh __A,
+                                                            __m128bh __B) {
+  return __builtin_ia32_vcomisbf16neq((__v8bf)__A, (__v8bf)__B);
 }
 
 #define _mm256_cmp_pbh_mask(__A, __B, __P)                                     \