alanzhao1 wrote:
Figured out a repro - `immintrin.h` doesn't compile if both `-msse` and
`-mno-sse2` are passed to clang:
```
$ cat ~/src/test-mac.c
#include<immintrin.h>
$ bin/clang -msse -mno-sse2 -o /dev/null -c ~/src/test-mac.c
In file included from /usr/local/google/home/ayzhao/src/test-mac.c:1:
In file included from
/usr/local/google/home/ayzhao/src/llvm-project/build/lib/clang/20/include/immintrin.h:660:
/usr/local/google/home/ayzhao/src/llvm-project/build/lib/clang/20/include/amxavx512intrin.h:240:19:
error: unknown type name '__m512bh'
240 | static __inline__ __m512bh __DEFAULT_FN_ATTRS_AVX512
| ^
/usr/local/google/home/ayzhao/src/llvm-project/build/lib/clang/20/include/amxavx512intrin.h:243:10:
error: returning '__attribute__((__vector_size__(32 * sizeof(__bf16))))
__bf16' (vector of 32 '__bf16' values) from a function with incompatible result
type 'int'
243 | return __builtin_ia32_tcvtrowps2pbf16h_internal(m, n, src, u);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/local/google/home/ayzhao/src/llvm-project/build/lib/clang/20/include/amxavx512intrin.h:246:19:
error: unknown type name '__m512bh'
246 | static __inline__ __m512bh __DEFAULT_FN_ATTRS_AVX512
| ^
/usr/local/google/home/ayzhao/src/llvm-project/build/lib/clang/20/include/amxavx512intrin.h:249:10:
error: returning '__attribute__((__vector_size__(32 * sizeof(__bf16))))
__bf16' (vector of 32 '__bf16' values) from a function with incompatible result
type 'int'
249 | return __builtin_ia32_tcvtrowps2pbf16l_internal(m, n, src, u);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/local/google/home/ayzhao/src/llvm-project/build/lib/clang/20/include/amxavx512intrin.h:252:19:
error: unknown type name '__m512h'
252 | static __inline__ __m512h __DEFAULT_FN_ATTRS_AVX512
_tile_cvtrowps2phh_internal(
| ^
/usr/local/google/home/ayzhao/src/llvm-project/build/lib/clang/20/include/amxavx512intrin.h:254:10:
error: returning '__attribute__((__vector_size__(32 * sizeof(_Float16))))
_Float16' (vector of 32 '_Float16' values) from a function with incompatible
result type 'int'
254 | return __builtin_ia32_tcvtrowps2phh_internal(m, n, src, u);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/local/google/home/ayzhao/src/llvm-project/build/lib/clang/20/include/amxavx512intrin.h:257:19:
error: unknown type name '__m512h'
257 | static __inline__ __m512h __DEFAULT_FN_ATTRS_AVX512
_tile_cvtrowps2phl_internal(
| ^
/usr/local/google/home/ayzhao/src/llvm-project/build/lib/clang/20/include/amxavx512intrin.h:259:10:
error: returning '__attribute__((__vector_size__(32 * sizeof(_Float16))))
_Float16' (vector of 32 '_Float16' values) from a function with incompatible
result type 'int'
259 | return __builtin_ia32_tcvtrowps2phl_internal(m, n, src, u);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/local/google/home/ayzhao/src/llvm-project/build/lib/clang/20/include/amxavx512intrin.h:302:8:
error: unknown type name '__m512bh'
302 | static __m512bh __tile_cvtrowps2pbf16h(__tile1024i src0, unsigned src1)
{
| ^
/usr/local/google/home/ayzhao/src/llvm-project/build/lib/clang/20/include/amxavx512intrin.h:321:8:
error: unknown type name '__m512bh'
321 | static __m512bh __tile_cvtrowps2pbf16l(__tile1024i src0, unsigned src1)
{
| ^
/usr/local/google/home/ayzhao/src/llvm-project/build/lib/clang/20/include/amxavx512intrin.h:340:8:
error: unknown type name '__m512h'
340 | static __m512h __tile_cvtrowps2phh(__tile1024i src0, unsigned src1) {
| ^
/usr/local/google/home/ayzhao/src/llvm-project/build/lib/clang/20/include/amxavx512intrin.h:359:8:
error: unknown type name '__m512h'
359 | static __m512h __tile_cvtrowps2phl(__tile1024i src0, unsigned src1) {
| ^
12 errors generated.
```
Test was on an x64 linux system.
https://github.com/llvm/llvm-project/pull/114070
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