[BUG] error: passing '__v2si' (aka 'int') to parameter of incompatible type '__attribute__((__vector_size__(2 * sizeof(int)))) int' (vector of 2 'int' values)

[rvandermeulen]

Ever since Microsoft published an updated Windows 11 26000 SDK last week, I see this build error when trying to build our project:

In file included from C:/Users/Ryan/repos/mozilla/gfx/cairo/cairo/src/win32/cairo-win32-display-surface.c:56:
In file included from C:/PROGRA~2/WI3CF2~1/10/Include/10.0.26100.0/ucrt\wchar.h:29:
In file included from C:\Users\Ryan\.mozbuild\clang\lib\clang\19\include\intrin.h:22:
In file included from C:\Users\Ryan\.mozbuild\clang\lib\clang\19\include\x86intrin.h:15:
In file included from C:\Users\Ryan\.mozbuild\clang\lib\clang\19\include\immintrin.h:20:
C:\Users\Ryan\.mozbuild\clang\lib\clang\19\include\mmintrin.h(73,40): error: passing '__v2si' (aka 'int') to parameter of incompatible type '__attribute__((__vector_size__(2 * sizeof(int)))) int' (vector of 2 'int' values)
   73 |     return __builtin_ia32_vec_ext_v2si((__v2si)__m, 0);
      |                                        ^~~~~~~~~~~
C:\Users\Ryan\.mozbuild\clang\lib\clang\19\include\mmintrin.h(130,43): error: passing '__v4hi' (aka 'short') to parameter of incompatible type '__attribute__((__vector_size__(4 * sizeof(short)))) short' (vector of 4 'short' values)
  130 |     return (__m64)__builtin_ia32_packsswb((__v4hi)__m1, (__v4hi)__m2);
      |                                           ^~~~~~~~~~~~
C:\Users\Ryan\.mozbuild\clang\lib\clang\19\include\mmintrin.h(155,43): error: passing '__v2si' (aka 'int') to parameter of incompatible type '__attribute__((__vector_size__(2 * sizeof(int)))) int' (vector of 2 'int' values)
  155 |     return (__m64)__builtin_ia32_packssdw((__v2si)__m1, (__v2si)__m2);
      |                                           ^~~~~~~~~~~~
C:\Users\Ryan\.mozbuild\clang\lib\clang\19\include\mmintrin.h(180,43): error: passing '__v4hi' (aka 'short') to parameter of incompatible type '__attribute__((__vector_size__(4 * sizeof(short)))) short' (vector of 4 'short' values)
  180 |     return (__m64)__builtin_ia32_packuswb((__v4hi)__m1, (__v4hi)__m2);
      |                                           ^~~~~~~~~~~~
C:\Users\Ryan\.mozbuild\clang\lib\clang\19\include\mmintrin.h(207,44): error: passing '__v8qi' (aka 'char') to parameter of incompatible type '__attribute__((__vector_size__(8 * sizeof(char)))) char' (vector of 8 'char' values)
  207 |     return (__m64)__builtin_ia32_punpckhbw((__v8qi)__m1, (__v8qi)__m2);
      |                                            ^~~~~~~~~~~~
C:\Users\Ryan\.mozbuild\clang\lib\clang\19\include\mmintrin.h(230,44): error: passing '__v4hi' (aka 'short') to parameter of incompatible type '__attribute__((__vector_size__(4 * sizeof(short)))) short' (vector of 4 'short' values)
  230 |     return (__m64)__builtin_ia32_punpckhwd((__v4hi)__m1, (__v4hi)__m2);
      |                                            ^~~~~~~~~~~~
C:\Users\Ryan\.mozbuild\clang\lib\clang\19\include\mmintrin.h(251,44): error: passing '__v2si' (aka 'int') to parameter of incompatible type '__attribute__((__vector_size__(2 * sizeof(int)))) int' (vector of 2 'int' values)
  251 |     return (__m64)__builtin_ia32_punpckhdq((__v2si)__m1, (__v2si)__m2);
      |                                            ^~~~~~~~~~~~
C:\Users\Ryan\.mozbuild\clang\lib\clang\19\include\mmintrin.h(278,44): error: passing '__v8qi' (aka 'char') to parameter of incompatible type '__attribute__((__vector_size__(8 * sizeof(char)))) char' (vector of 8 'char' values)
  278 |     return (__m64)__builtin_ia32_punpcklbw((__v8qi)__m1, (__v8qi)__m2);
      |                                            ^~~~~~~~~~~~
C:\Users\Ryan\.mozbuild\clang\lib\clang\19\include\mmintrin.h(301,44): error: passing '__v4hi' (aka 'short') to parameter of incompatible type '__attribute__((__vector_size__(4 * sizeof(short)))) short' (vector of 4 'short' values)
  301 |     return (__m64)__builtin_ia32_punpcklwd((__v4hi)__m1, (__v4hi)__m2);
      |                                            ^~~~~~~~~~~~
C:\Users\Ryan\.mozbuild\clang\lib\clang\19\include\mmintrin.h(322,44): error: passing '__v2si' (aka 'int') to parameter of incompatible type '__attribute__((__vector_size__(2 * sizeof(int)))) int' (vector of 2 'int' values)
  322 |     return (__m64)__builtin_ia32_punpckldq((__v2si)__m1, (__v2si)__m2);
      |                                            ^~~~~~~~~~~~
C:\Users\Ryan\.mozbuild\clang\lib\clang\19\include\mmintrin.h(343,40): error: passing '__v8qi' (aka 'char') to parameter of incompatible type '__attribute__((__vector_size__(8 * sizeof(char)))) char' (vector of 8 'char' values)
  343 |     return (__m64)__builtin_ia32_paddb((__v8qi)__m1, (__v8qi)__m2);
      |                                        ^~~~~~~~~~~~
C:\Users\Ryan\.mozbuild\clang\lib\clang\19\include\mmintrin.h(364,40): error: passing '__v4hi' (aka 'short') to parameter of incompatible type '__attribute__((__vector_size__(4 * sizeof(short)))) short' (vector of 4 'short' values)
  364 |     return (__m64)__builtin_ia32_paddw((__v4hi)__m1, (__v4hi)__m2);
      |                                        ^~~~~~~~~~~~
C:\Users\Ryan\.mozbuild\clang\lib\clang\19\include\mmintrin.h(385,40): error: passing '__v2si' (aka 'int') to parameter of incompatible type '__attribute__((__vector_size__(2 * sizeof(int)))) int' (vector of 2 'int' values)
  385 |     return (__m64)__builtin_ia32_paddd((__v2si)__m1, (__v2si)__m2);
      |                                        ^~~~~~~~~~~~
C:\Users\Ryan\.mozbuild\clang\lib\clang\19\include\mmintrin.h(409,41): error: passing '__v8qi' (aka 'char') to parameter of incompatible type '__attribute__((__vector_size__(8 * sizeof(char)))) char' (vector of 8 'char' values)
  409 |     return (__m64)__builtin_ia32_paddsb((__v8qi)__m1, (__v8qi)__m2);
      |                                         ^~~~~~~~~~~~
C:\Users\Ryan\.mozbuild\clang\lib\clang\19\include\mmintrin.h(433,41): error: passing '__v4hi' (aka 'short') to parameter of incompatible type '__attribute__((__vector_size__(4 * sizeof(short)))) short' (vector of 4 'short' values)
  433 |     return (__m64)__builtin_ia32_paddsw((__v4hi)__m1, (__v4hi)__m2);
      |                                         ^~~~~~~~~~~~
C:\Users\Ryan\.mozbuild\clang\lib\clang\19\include\mmintrin.h(456,42): error: passing '__v8qi' (aka 'char') to parameter of incompatible type '__attribute__((__vector_size__(8 * sizeof(char)))) char' (vector of 8 'char' values)
  456 |     return (__m64)__builtin_ia32_paddusb((__v8qi)__m1, (__v8qi)__m2);
      |                                          ^~~~~~~~~~~~
C:\Users\Ryan\.mozbuild\clang\lib\clang\19\include\mmintrin.h(479,42): error: passing '__v4hi' (aka 'short') to parameter of incompatible type '__attribute__((__vector_size__(4 * sizeof(short)))) short' (vector of 4 'short' values)
  479 |     return (__m64)__builtin_ia32_paddusw((__v4hi)__m1, (__v4hi)__m2);
      |                                          ^~~~~~~~~~~~
C:\Users\Ryan\.mozbuild\clang\lib\clang\19\include\mmintrin.h(500,40): error: passing '__v8qi' (aka 'char') to parameter of incompatible type '__attribute__((__vector_size__(8 * sizeof(char)))) char' (vector of 8 'char' values)
  500 |     return (__m64)__builtin_ia32_psubb((__v8qi)__m1, (__v8qi)__m2);
      |                                        ^~~~~~~~~~~~
C:\Users\Ryan\.mozbuild\clang\lib\clang\19\include\mmintrin.h(521,40): error: passing '__v4hi' (aka 'short') to parameter of incompatible type '__attribute__((__vector_size__(4 * sizeof(short)))) short' (vector of 4 'short' values)
  521 |     return (__m64)__builtin_ia32_psubw((__v4hi)__m1, (__v4hi)__m2);
      |                                        ^~~~~~~~~~~~
fatal error: too many errors emitted, stopping now [-ferror-limit=]

This looks potentially like it may have a similar cause to #95133 (which we were also hitting as Skia is a part of our project). Also looks maybe related to #91415 filed previously?

[frederick-vs-ja]

The problematic code was significantly changed by #96540. Could you verify this with Clang 20?

[llvmbot]

@llvm/issue-subscribers-backend-x86

Author: Ryan VanderMeulen (rvandermeulen)

Ever since Microsoft published an updated Windows 11 26000 SDK last week, I see this build error when trying to build our project: ``` In file included from C:/Users/Ryan/repos/mozilla/gfx/cairo/cairo/src/win32/cairo-win32-display-surface.c:56: In file included from C:/PROGRA~2/WI3CF2~1/10/Include/10.0.26100.0/ucrt\wchar.h:29: In file included from C:\Users\Ryan\.mozbuild\clang\lib\clang\19\include\intrin.h:22: In file included from C:\Users\Ryan\.mozbuild\clang\lib\clang\19\include\x86intrin.h:15: In file included from C:\Users\Ryan\.mozbuild\clang\lib\clang\19\include\immintrin.h:20: C:\Users\Ryan\.mozbuild\clang\lib\clang\19\include\mmintrin.h(73,40): error: passing '__v2si' (aka 'int') to parameter of incompatible type '__attribute__((__vector_size__(2 * sizeof(int)))) int' (vector of 2 'int' values) 73 | return __builtin_ia32_vec_ext_v2si((__v2si)__m, 0); | ^~~~~~~~~~~ C:\Users\Ryan\.mozbuild\clang\lib\clang\19\include\mmintrin.h(130,43): error: passing '__v4hi' (aka 'short') to parameter of incompatible type '__attribute__((__vector_size__(4 * sizeof(short)))) short' (vector of 4 'short' values) 130 | return (__m64)__builtin_ia32_packsswb((__v4hi)__m1, (__v4hi)__m2); | ^~~~~~~~~~~~ C:\Users\Ryan\.mozbuild\clang\lib\clang\19\include\mmintrin.h(155,43): error: passing '__v2si' (aka 'int') to parameter of incompatible type '__attribute__((__vector_size__(2 * sizeof(int)))) int' (vector of 2 'int' values) 155 | return (__m64)__builtin_ia32_packssdw((__v2si)__m1, (__v2si)__m2); | ^~~~~~~~~~~~ C:\Users\Ryan\.mozbuild\clang\lib\clang\19\include\mmintrin.h(180,43): error: passing '__v4hi' (aka 'short') to parameter of incompatible type '__attribute__((__vector_size__(4 * sizeof(short)))) short' (vector of 4 'short' values) 180 | return (__m64)__builtin_ia32_packuswb((__v4hi)__m1, (__v4hi)__m2); | ^~~~~~~~~~~~ C:\Users\Ryan\.mozbuild\clang\lib\clang\19\include\mmintrin.h(207,44): error: passing '__v8qi' (aka 'char') to parameter of incompatible type '__attribute__((__vector_size__(8 * sizeof(char)))) char' (vector of 8 'char' values) 207 | return (__m64)__builtin_ia32_punpckhbw((__v8qi)__m1, (__v8qi)__m2); | ^~~~~~~~~~~~ C:\Users\Ryan\.mozbuild\clang\lib\clang\19\include\mmintrin.h(230,44): error: passing '__v4hi' (aka 'short') to parameter of incompatible type '__attribute__((__vector_size__(4 * sizeof(short)))) short' (vector of 4 'short' values) 230 | return (__m64)__builtin_ia32_punpckhwd((__v4hi)__m1, (__v4hi)__m2); | ^~~~~~~~~~~~ C:\Users\Ryan\.mozbuild\clang\lib\clang\19\include\mmintrin.h(251,44): error: passing '__v2si' (aka 'int') to parameter of incompatible type '__attribute__((__vector_size__(2 * sizeof(int)))) int' (vector of 2 'int' values) 251 | return (__m64)__builtin_ia32_punpckhdq((__v2si)__m1, (__v2si)__m2); | ^~~~~~~~~~~~ C:\Users\Ryan\.mozbuild\clang\lib\clang\19\include\mmintrin.h(278,44): error: passing '__v8qi' (aka 'char') to parameter of incompatible type '__attribute__((__vector_size__(8 * sizeof(char)))) char' (vector of 8 'char' values) 278 | return (__m64)__builtin_ia32_punpcklbw((__v8qi)__m1, (__v8qi)__m2); | ^~~~~~~~~~~~ C:\Users\Ryan\.mozbuild\clang\lib\clang\19\include\mmintrin.h(301,44): error: passing '__v4hi' (aka 'short') to parameter of incompatible type '__attribute__((__vector_size__(4 * sizeof(short)))) short' (vector of 4 'short' values) 301 | return (__m64)__builtin_ia32_punpcklwd((__v4hi)__m1, (__v4hi)__m2); | ^~~~~~~~~~~~ C:\Users\Ryan\.mozbuild\clang\lib\clang\19\include\mmintrin.h(322,44): error: passing '__v2si' (aka 'int') to parameter of incompatible type '__attribute__((__vector_size__(2 * sizeof(int)))) int' (vector of 2 'int' values) 322 | return (__m64)__builtin_ia32_punpckldq((__v2si)__m1, (__v2si)__m2); | ^~~~~~~~~~~~ C:\Users\Ryan\.mozbuild\clang\lib\clang\19\include\mmintrin.h(343,40): error: passing '__v8qi' (aka 'char') to parameter of incompatible type '__attribute__((__vector_size__(8 * sizeof(char)))) char' (vector of 8 'char' values) 343 | return (__m64)__builtin_ia32_paddb((__v8qi)__m1, (__v8qi)__m2); | ^~~~~~~~~~~~ C:\Users\Ryan\.mozbuild\clang\lib\clang\19\include\mmintrin.h(364,40): error: passing '__v4hi' (aka 'short') to parameter of incompatible type '__attribute__((__vector_size__(4 * sizeof(short)))) short' (vector of 4 'short' values) 364 | return (__m64)__builtin_ia32_paddw((__v4hi)__m1, (__v4hi)__m2); | ^~~~~~~~~~~~ C:\Users\Ryan\.mozbuild\clang\lib\clang\19\include\mmintrin.h(385,40): error: passing '__v2si' (aka 'int') to parameter of incompatible type '__attribute__((__vector_size__(2 * sizeof(int)))) int' (vector of 2 'int' values) 385 | return (__m64)__builtin_ia32_paddd((__v2si)__m1, (__v2si)__m2); | ^~~~~~~~~~~~ C:\Users\Ryan\.mozbuild\clang\lib\clang\19\include\mmintrin.h(409,41): error: passing '__v8qi' (aka 'char') to parameter of incompatible type '__attribute__((__vector_size__(8 * sizeof(char)))) char' (vector of 8 'char' values) 409 | return (__m64)__builtin_ia32_paddsb((__v8qi)__m1, (__v8qi)__m2); | ^~~~~~~~~~~~ C:\Users\Ryan\.mozbuild\clang\lib\clang\19\include\mmintrin.h(433,41): error: passing '__v4hi' (aka 'short') to parameter of incompatible type '__attribute__((__vector_size__(4 * sizeof(short)))) short' (vector of 4 'short' values) 433 | return (__m64)__builtin_ia32_paddsw((__v4hi)__m1, (__v4hi)__m2); | ^~~~~~~~~~~~ C:\Users\Ryan\.mozbuild\clang\lib\clang\19\include\mmintrin.h(456,42): error: passing '__v8qi' (aka 'char') to parameter of incompatible type '__attribute__((__vector_size__(8 * sizeof(char)))) char' (vector of 8 'char' values) 456 | return (__m64)__builtin_ia32_paddusb((__v8qi)__m1, (__v8qi)__m2); | ^~~~~~~~~~~~ C:\Users\Ryan\.mozbuild\clang\lib\clang\19\include\mmintrin.h(479,42): error: passing '__v4hi' (aka 'short') to parameter of incompatible type '__attribute__((__vector_size__(4 * sizeof(short)))) short' (vector of 4 'short' values) 479 | return (__m64)__builtin_ia32_paddusw((__v4hi)__m1, (__v4hi)__m2); | ^~~~~~~~~~~~ C:\Users\Ryan\.mozbuild\clang\lib\clang\19\include\mmintrin.h(500,40): error: passing '__v8qi' (aka 'char') to parameter of incompatible type '__attribute__((__vector_size__(8 * sizeof(char)))) char' (vector of 8 'char' values) 500 | return (__m64)__builtin_ia32_psubb((__v8qi)__m1, (__v8qi)__m2); | ^~~~~~~~~~~~ C:\Users\Ryan\.mozbuild\clang\lib\clang\19\include\mmintrin.h(521,40): error: passing '__v4hi' (aka 'short') to parameter of incompatible type '__attribute__((__vector_size__(4 * sizeof(short)))) short' (vector of 4 'short' values) 521 | return (__m64)__builtin_ia32_psubw((__v4hi)__m1, (__v4hi)__m2); | ^~~~~~~~~~~~ fatal error: too many errors emitted, stopping now [-ferror-limit=] ```

This looks potentially like it may have a similar cause to #95133 (which we were also hitting as Skia is a part of our project). Also looks maybe related to #91415 filed previously?

[rvandermeulen]

@frederick-vs-ja It appears that clang-20 just hits a different set of errors.

In file included from C:/Users/Ryan/repos/mozilla/gfx/cairo/cairo/src/win32/cairo-win32-device.c:46:
In file included from C:/PROGRA~2/WI3CF2~1/10/Include/10.0.26100.0/ucrt\wchar.h:29:
In file included from C:\Users\Ryan\.mozbuild\clang\lib\clang\20\include\intrin.h:22:
In file included from C:\Users\Ryan\.mozbuild\clang\lib\clang\20\include\x86intrin.h:15:
In file included from C:\Users\Ryan\.mozbuild\clang\lib\clang\20\include\immintrin.h:20:
C:\Users\Ryan\.mozbuild\clang\lib\clang\20\include\mmintrin.h(108,25): error: subscripted value is not an array, pointer, or vector
  108 |     return ((__v2si)__m)[0];
      |            ~~~~~~~~~~~~~^~
C:\Users\Ryan\.mozbuild\clang\lib\clang\20\include\mmintrin.h(166,17): error: first two arguments to '__builtin_shufflevector' must be vectors
  166 |         (__v8hi)__builtin_shufflevector(__m1, __m2, 0, 1), (__v8hi){}));
      |                 ^                       ~~~~~~~~~~
C:\Users\Ryan\.mozbuild\clang\lib\clang\20\include\mmintrin.h(59,44): note: expanded from macro '__trunc64'
   59 |   (__m64) __builtin_shufflevector((__v2di)(x), __extension__(__v2di){}, 0)
      |                                            ^
C:\Users\Ryan\.mozbuild\clang\lib\clang\20\include\mmintrin.h(166,9): error: passing '__v8hi' (aka 'short') to parameter of incompatible type '__attribute__((__vector_size__(8 * sizeof(short)))) short' (vector of 8 'short' values)
  166 |         (__v8hi)__builtin_shufflevector(__m1, __m2, 0, 1), (__v8hi){}));
      |         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
C:\Users\Ryan\.mozbuild\clang\lib\clang\20\include\mmintrin.h(59,44): note: expanded from macro '__trunc64'
   59 |   (__m64) __builtin_shufflevector((__v2di)(x), __extension__(__v2di){}, 0)
      |                                            ^
C:\Users\Ryan\.mozbuild\clang\lib\clang\20\include\mmintrin.h(165,12): error: first two arguments to '__builtin_shufflevector' must be vectors
  165 |     return __trunc64(__builtin_ia32_packsswb128(
      |            ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  166 |         (__v8hi)__builtin_shufflevector(__m1, __m2, 0, 1), (__v8hi){}));
      |         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
C:\Users\Ryan\.mozbuild\clang\lib\clang\20\include\mmintrin.h(59,11): note: expanded from macro '__trunc64'
   59 |   (__m64) __builtin_shufflevector((__v2di)(x), __extension__(__v2di){}, 0)
      |           ^                       ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
C:\Users\Ryan\.mozbuild\clang\lib\clang\20\include\mmintrin.h(192,17): error: first two arguments to '__builtin_shufflevector' must be vectors
  192 |         (__v4si)__builtin_shufflevector(__m1, __m2, 0, 1), (__v4si){}));
      |                 ^                       ~~~~~~~~~~
C:\Users\Ryan\.mozbuild\clang\lib\clang\20\include\mmintrin.h(59,44): note: expanded from macro '__trunc64'
   59 |   (__m64) __builtin_shufflevector((__v2di)(x), __extension__(__v2di){}, 0)
      |                                            ^
C:\Users\Ryan\.mozbuild\clang\lib\clang\20\include\mmintrin.h(192,9): error: passing '__v4si' (aka 'int') to parameter of incompatible type '__attribute__((__vector_size__(4 * sizeof(int)))) int' (vector of 4 'int' values)
  192 |         (__v4si)__builtin_shufflevector(__m1, __m2, 0, 1), (__v4si){}));
      |         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
C:\Users\Ryan\.mozbuild\clang\lib\clang\20\include\mmintrin.h(59,44): note: expanded from macro '__trunc64'
   59 |   (__m64) __builtin_shufflevector((__v2di)(x), __extension__(__v2di){}, 0)
      |                                            ^
C:\Users\Ryan\.mozbuild\clang\lib\clang\20\include\mmintrin.h(191,12): error: first two arguments to '__builtin_shufflevector' must be vectors
  191 |     return __trunc64(__builtin_ia32_packssdw128(
      |            ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  192 |         (__v4si)__builtin_shufflevector(__m1, __m2, 0, 1), (__v4si){}));
      |         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
C:\Users\Ryan\.mozbuild\clang\lib\clang\20\include\mmintrin.h(59,11): note: expanded from macro '__trunc64'
   59 |   (__m64) __builtin_shufflevector((__v2di)(x), __extension__(__v2di){}, 0)
      |           ^                       ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
C:\Users\Ryan\.mozbuild\clang\lib\clang\20\include\mmintrin.h(218,17): error: first two arguments to '__builtin_shufflevector' must be vectors
  218 |         (__v8hi)__builtin_shufflevector(__m1, __m2, 0, 1), (__v8hi){}));
      |                 ^                       ~~~~~~~~~~
C:\Users\Ryan\.mozbuild\clang\lib\clang\20\include\mmintrin.h(59,44): note: expanded from macro '__trunc64'
   59 |   (__m64) __builtin_shufflevector((__v2di)(x), __extension__(__v2di){}, 0)
      |                                            ^
C:\Users\Ryan\.mozbuild\clang\lib\clang\20\include\mmintrin.h(218,9): error: passing '__v8hi' (aka 'short') to parameter of incompatible type '__attribute__((__vector_size__(8 * sizeof(short)))) short' (vector of 8 'short' values)
  218 |         (__v8hi)__builtin_shufflevector(__m1, __m2, 0, 1), (__v8hi){}));
      |         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
C:\Users\Ryan\.mozbuild\clang\lib\clang\20\include\mmintrin.h(59,44): note: expanded from macro '__trunc64'
   59 |   (__m64) __builtin_shufflevector((__v2di)(x), __extension__(__v2di){}, 0)
      |                                            ^
C:\Users\Ryan\.mozbuild\clang\lib\clang\20\include\mmintrin.h(217,12): error: first two arguments to '__builtin_shufflevector' must be vectors
   217 |     return __trunc64(__builtin_ia32_packuswb128(
       |            ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   218 |         (__v8hi)__builtin_shufflevector(__m1, __m2, 0, 1), (__v8hi){}));
       |         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 C:\Users\Ryan\.mozbuild\clang\lib\clang\20\include\mmintrin.h(59,11): note: expanded from macro '__trunc64'
    59 |   (__m64) __builtin_shufflevector((__v2di)(x), __extension__(__v2di){}, 0)
       |           ^                       ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 C:\Users\Ryan\.mozbuild\clang\lib\clang\20\include\mmintrin.h(245,19): error: first two arguments to '__builtin_shufflevector' must be vectors
   245 |     return (__m64)__builtin_shufflevector((__v8qi)__m1, (__v8qi)__m2,
       |                   ^                       ~~~~~~~~~~~~~~~~~~~~~~~~~~
 C:\Users\Ryan\.mozbuild\clang\lib\clang\20\include\mmintrin.h(269,19): error: first two arguments to '__builtin_shufflevector' must be vectors
   269 |     return (__m64)__builtin_shufflevector((__v4hi)__m1, (__v4hi)__m2,
       |                   ^                       ~~~~~~~~~~~~~~~~~~~~~~~~~~
 C:\Users\Ryan\.mozbuild\clang\lib\clang\20\include\mmintrin.h(291,19): error: first two arguments to '__builtin_shufflevector' must be vectors
   291 |     return (__m64)__builtin_shufflevector((__v2si)__m1, (__v2si)__m2, 1, 3);
       |                   ^                       ~~~~~~~~~~~~~~~~~~~~~~~~~~
 C:\Users\Ryan\.mozbuild\clang\lib\clang\20\include\mmintrin.h(318,19): error: first two arguments to '__builtin_shufflevector' must be vectors
   318 |     return (__m64)__builtin_shufflevector((__v8qi)__m1, (__v8qi)__m2,
       |                   ^                       ~~~~~~~~~~~~~~~~~~~~~~~~~~
 C:\Users\Ryan\.mozbuild\clang\lib\clang\20\include\mmintrin.h(342,19): error: first two arguments to '__builtin_shufflevector' must be vectors
   342 |     return (__m64)__builtin_shufflevector((__v4hi)__m1, (__v4hi)__m2,
       |                   ^                       ~~~~~~~~~~~~~~~~~~~~~~~~~~
 C:\Users\Ryan\.mozbuild\clang\lib\clang\20\include\mmintrin.h(364,19): error: first two arguments to '__builtin_shufflevector' must be vectors
   364 |     return (__m64)__builtin_shufflevector((__v2si)__m1, (__v2si)__m2, 0, 2);
       |                   ^                       ~~~~~~~~~~~~~~~~~~~~~~~~~~
 C:\Users\Ryan\.mozbuild\clang\lib\clang\20\include\mmintrin.h(707,56): error: first two arguments to '__builtin_shufflevector' must be vectors
   707 |     return __trunc64(__builtin_ia32_pmaddwd128((__v8hi)__anyext128(__m1),
       |            ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~
   708 |                                                (__v8hi)__anyext128(__m2)));
       |                                                ~~~~~~~~~~~~~~~~~~~~~~~~~~~
 C:\Users\Ryan\.mozbuild\clang\lib\clang\20\include\mmintrin.h(61,13): note: expanded from macro '__anyext128'
    61 |   (__m128i) __builtin_shufflevector((__v2si)(x), __extension__(__v2si){}, 0,   \
       |             ^
 C:\Users\Ryan\.mozbuild\clang\lib\clang\20\include\mmintrin.h(59,44): note: expanded from macro '__trunc64'
    59 |   (__m64) __builtin_shufflevector((__v2di)(x), __extension__(__v2di){}, 0)
       |                                            ^
 C:\Users\Ryan\.mozbuild\clang\lib\clang\20\include\mmintrin.h(708,56): error: first two arguments to '__builtin_shufflevector' must be vectors
   707 |     return __trunc64(__builtin_ia32_pmaddwd128((__v8hi)__anyext128(__m1),
       |            ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  708 |                                                (__v8hi)__anyext128(__m2)));
      |                                                ~~~~~~~~^~~~~~~~~~~~~~~~~~~
C:\Users\Ryan\.mozbuild\clang\lib\clang\20\include\mmintrin.h(61,13): note: expanded from macro '__anyext128'
   61 |   (__m128i) __builtin_shufflevector((__v2si)(x), __extension__(__v2si){}, 0,   \
      |             ^
C:\Users\Ryan\.mozbuild\clang\lib\clang\20\include\mmintrin.h(59,44): note: expanded from macro '__trunc64'
   59 |   (__m64) __builtin_shufflevector((__v2di)(x), __extension__(__v2di){}, 0)
      |                                            ^
C:\Users\Ryan\.mozbuild\clang\lib\clang\20\include\mmintrin.h(707,48): error: passing '__v8hi' (aka 'short') to parameter of incompatible type '__attribute__((__vector_size__(8 * sizeof(short)))) short' (vector of 8 'short' values)
  707 |     return __trunc64(__builtin_ia32_pmaddwd128((__v8hi)__anyext128(__m1),
      |            ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~
  708 |                                                (__v8hi)__anyext128(__m2)));
      |                                                ~~~~~~~~~~~~~~~~~~~~~~~~~~~
C:\Users\Ryan\.mozbuild\clang\lib\clang\20\include\mmintrin.h(59,44): note: expanded from macro '__trunc64'
   59 |   (__m64) __builtin_shufflevector((__v2di)(x), __extension__(__v2di){}, 0)
      |                                            ^
fatal error: too many errors emitted, stopping now [-ferror-limit=]

[phoebewang]

It looks like the same issue as #91415, which was solved through adjusting the position of head files.

I think it might be cuased by some header files (probably from Windows) define the same __m64, __v8hi etc. before including immintrin.h. Since the direct reason pointing to Microsoft update, maybe ask for Microsoft community to check first?

[rvandermeulen]

I've submitted https://developercommunity.visualstudio.com/t/Build-failures-with-Windows-SDK-26100-Fe/10854761?port=1025&fsid=8471f8bf-b046-436a-a697-ac791ad1bff9

[rvandermeulen]

This ended up being a bug in libcairo. Patch submitted upstream.
https://gitlab.freedesktop.org/cairo/cairo/-/merge_requests/612