[gcc r13-4187] i386: Uglify some local identifiers in *intrin.h [PR107748]

[Jakub Jelinek <jakub@gcc.gnu.org>]

https://gcc.gnu.org/g:ec8ec09f9414be871e322fecf4ebf53e3687bd22

commit r13-4187-gec8ec09f9414be871e322fecf4ebf53e3687bd22
Author: Jakub Jelinek <jakub@redhat.com>
Date:   Mon Nov 21 10:28:27 2022 +0100

    i386: Uglify some local identifiers in *intrin.h [PR107748]
    
    While reporting PR107748 (where is a problem with non-uglified names,
    but I've left it out because it needs fixing anyway), I've noticed
    various spots where identifiers in *intrin.h headers weren't uglified.
    The following patch fixed those that are related to unions (I've grepped
    for [a-zA-Z]\.[a-zA-Z] spots).
    The reason we need those to be uglified is the same as why the arguments
    of the inlines are __ prefixed and most of automatic vars in the inlines
    - say a, v or u aren't part of implementation namespace and so users could
     #define u whatever->something
     #include <x86intrin.h>
    and it should still work, as long as u is not e.g. one of the names
    of the functions/macros the header provides (_mm* etc.).
    
    2022-11-21  Jakub Jelinek  <jakub@redhat.com>
    
            PR target/107748
            * config/i386/avx512fp16intrin.h (_mm512_castph512_ph128,
            _mm512_castph512_ph256, _mm512_castph128_ph512,
            _mm512_castph256_ph512, _mm512_set1_pch): Uglify names of local
            variables and union members.
            * config/i386/avx512fp16vlintrin.h (_mm256_castph256_ph128,
            _mm256_castph128_ph256, _mm256_set1_pch, _mm_set1_pch): Likewise.
            * config/i386/smmintrin.h (_mm_extract_ps): Likewise.

Diff:
---
 gcc/config/i386/avx512fp16intrin.h   | 44 ++++++++++++++++++------------------
 gcc/config/i386/avx512fp16vlintrin.h | 34 ++++++++++++++--------------
 gcc/config/i386/smmintrin.h          | 13 ++++++-----
 3 files changed, 46 insertions(+), 45 deletions(-)

diff --git a/gcc/config/i386/avx512fp16intrin.h b/gcc/config/i386/avx512fp16intrin.h
index 75f7475ad18..70f2f2b0d7f 100644
--- a/gcc/config/i386/avx512fp16intrin.h
+++ b/gcc/config/i386/avx512fp16intrin.h
@@ -272,10 +272,10 @@ _mm512_castph512_ph128 (__m512h __A)
 {
   union
   {
-    __m128h a[4];
-    __m512h v;
-  } u = { .v = __A };
-  return u.a[0];
+    __m128h __a[4];
+    __m512h __v;
+  } __u = { .__v = __A };
+  return __u.__a[0];
 }
 
 extern __inline __m256h
@@ -284,10 +284,10 @@ _mm512_castph512_ph256 (__m512h __A)
 {
   union
   {
-    __m256h a[2];
-    __m512h v;
-  } u = { .v = __A };
-  return u.a[0];
+    __m256h __a[2];
+    __m512h __v;
+  } __u = { .__v = __A };
+  return __u.__a[0];
 }
 
 extern __inline __m512h
@@ -296,11 +296,11 @@ _mm512_castph128_ph512 (__m128h __A)
 {
   union
   {
-    __m128h a[4];
-    __m512h v;
-  } u;
-  u.a[0] = __A;
-  return u.v;
+    __m128h __a[4];
+    __m512h __v;
+  } __u;
+  __u.__a[0] = __A;
+  return __u.__v;
 }
 
 extern __inline __m512h
@@ -309,11 +309,11 @@ _mm512_castph256_ph512 (__m256h __A)
 {
   union
   {
-    __m256h a[2];
-    __m512h v;
-  } u;
-  u.a[0] = __A;
-  return u.v;
+    __m256h __a[2];
+    __m512h __v;
+  } __u;
+  __u.__a[0] = __A;
+  return __u.__v;
 }
 
 extern __inline __m512h
@@ -7156,11 +7156,11 @@ _mm512_set1_pch (_Float16 _Complex __A)
 {
   union
   {
-    _Float16 _Complex a;
-    float b;
-  } u = { .a = __A};
+    _Float16 _Complex __a;
+    float __b;
+  } __u = { .__a = __A};
 
-  return (__m512h) _mm512_set1_ps (u.b);
+  return (__m512h) _mm512_set1_ps (__u.__b);
 }
 
 // intrinsics below are alias for f*mul_*ch
diff --git a/gcc/config/i386/avx512fp16vlintrin.h b/gcc/config/i386/avx512fp16vlintrin.h
index 0794498a3d6..2783971accb 100644
--- a/gcc/config/i386/avx512fp16vlintrin.h
+++ b/gcc/config/i386/avx512fp16vlintrin.h
@@ -124,10 +124,10 @@ _mm256_castph256_ph128 (__m256h __A)
 {
   union
   {
-    __m128h a[2];
-    __m256h v;
-  } u = { .v = __A };
-  return u.a[0];
+    __m128h __a[2];
+    __m256h __v;
+  } __u = { .__v = __A };
+  return __u.__a[0];
 }
 
 extern __inline __m256h
@@ -136,11 +136,11 @@ _mm256_castph128_ph256 (__m128h __A)
 {
   union
   {
-    __m128h a[2];
-    __m256h v;
-  } u;
-  u.a[0] = __A;
-  return u.v;
+    __m128h __a[2];
+    __m256h __v;
+  } __u;
+  __u.__a[0] = __A;
+  return __u.__v;
 }
 
 extern __inline __m256h
@@ -3317,11 +3317,11 @@ _mm256_set1_pch (_Float16 _Complex __A)
 {
   union
   {
-    _Float16 _Complex a;
-    float b;
-  } u = { .a = __A };
+    _Float16 _Complex __a;
+    float __b;
+  } __u = { .__a = __A };
 
-  return (__m256h) _mm256_set1_ps (u.b);
+  return (__m256h) _mm256_set1_ps (__u.__b);
 }
 
 extern __inline __m128h
@@ -3330,11 +3330,11 @@ _mm_set1_pch (_Float16 _Complex __A)
 {
   union
   {
-    _Float16 _Complex a;
-    float b;
-  } u = { .a = __A };
+    _Float16 _Complex __a;
+    float __b;
+  } __u = { .__a = __A };
 
-  return (__m128h) _mm_set1_ps (u.b);
+  return (__m128h) _mm_set1_ps (__u.__b);
 }
 
 // intrinsics below are alias for f*mul_*ch
diff --git a/gcc/config/i386/smmintrin.h b/gcc/config/i386/smmintrin.h
index eb6a451c10a..47fd9b8a2c6 100644
--- a/gcc/config/i386/smmintrin.h
+++ b/gcc/config/i386/smmintrin.h
@@ -365,17 +365,18 @@ _mm_insert_ps (__m128 __D, __m128 __S, const int __N)
 extern __inline int __attribute__((__gnu_inline__, __always_inline__, __artificial__))
 _mm_extract_ps (__m128 __X, const int __N)
 {
-  union { int i; float f; } __tmp;
-  __tmp.f = __builtin_ia32_vec_ext_v4sf ((__v4sf)__X, __N);
-  return __tmp.i;
+  union { int __i; float __f; } __tmp;
+  __tmp.__f = __builtin_ia32_vec_ext_v4sf ((__v4sf)__X, __N);
+  return __tmp.__i;
 }
 #else
 #define _mm_extract_ps(X, N)						\
   (__extension__							\
    ({									\
-     union { int i; float f; } __tmp;					\
-     __tmp.f = __builtin_ia32_vec_ext_v4sf ((__v4sf)(__m128)(X), (int)(N)); \
-     __tmp.i;								\
+     union { int __i; float __f; } __tmp;				\
+     __tmp.__f = __builtin_ia32_vec_ext_v4sf ((__v4sf)(__m128)(X),	\
+					      (int)(N));		\
+     __tmp.__i;								\
    }))
 #endif