tests fail on powerpc64 with clang: xsimd_vsx_register.hpp:67:61: error: cannot use 'long' with '__vector bool' and other errors

[drew-parsons]

powerpc64 tests of xsimd 14.0.0 on debian (ppc64el) are passing with gcc 15 but failing with clang 21.

A full test log can be seen at https://ci.debian.net/data/autopkgtest/unstable/ppc64el/x/xsimd/68549628/log.gz

2007s [  5%] Building CXX object CMakeFiles/test_xsimd.dir/test_api.cpp.o
2007s /usr/bin/clang++ -DXSIMD_ENABLE_XTL_COMPLEX=1  -Wunused-parameter -Wextra -Wreorder -Wshorten-64-to-32 -std=c++17 -g -fPIC -mcpu=native -mtune=native -O3 -DNDEBUG -MD -MT CMakeFiles/test_xsimd.dir/test_api.cpp.o -MF CMakeFiles/test_xsimd.dir/test_api.cpp.o.d -o CMakeFiles/test_xsimd.dir/test_api.cpp.o -c /tmp/autopkgtest-lxc.egz8qg2i/downtmp/build.Yvf/src/test/test_api.cpp
2010s In file included from /tmp/autopkgtest-lxc.egz8qg2i/downtmp/build.Yvf/src/test/test_api.cpp:12:
2010s In file included from /usr/include/xsimd/xsimd.hpp:63:
2010s In file included from /usr/include/xsimd/memory/xsimd_aligned_allocator.hpp:27:
2010s In file included from /usr/include/xsimd/memory/../config/xsimd_arch.hpp:19:
2010s In file included from /usr/include/xsimd/memory/../config/../types/xsimd_all_registers.hpp:51:
2010s /usr/include/xsimd/memory/../config/../types/xsimd_vsx_register.hpp:67:61: error: cannot use 'long' with '__vector bool'
2010s    67 |         XSIMD_DECLARE_SIMD_BOOL_VSX_REGISTER(unsigned long, long);
2010s       |                                                             ^
2010s /usr/include/xsimd/memory/../config/../types/xsimd_vsx_register.hpp:68:52: error: cannot use 'long' with '__vector bool'
2010s    68 |         XSIMD_DECLARE_SIMD_BOOL_VSX_REGISTER(long, long);
2010s       |                                                    ^
2010s /usr/include/xsimd/memory/../config/../types/xsimd_vsx_register.hpp:70:54: error: cannot use 'long' with '__vector bool'
2010s    70 |         XSIMD_DECLARE_SIMD_BOOL_VSX_REGISTER(double, long);
2010s       |                                                      ^
...
1988s 19 errors generated.
1988s make[2]: *** [CMakeFiles/test_xsimd.dir/build.make:93: CMakeFiles/test_xsimd.dir/test_api.cpp.o] Error 1

If it's working fine with gcc, does that mean there might be clang option that could fix the issue. Or should it be considered a bug in clang?

[drew-parsons]

19 errors. I showed the first one in the opening description for brevity. A summary of the (classes of) errors is

1984s /usr/include/xsimd/memory/../config/../types/xsimd_vsx_register.hpp:67:61: error: cannot use 'long' with '__vector bool'
1984s    67 |         XSIMD_DECLARE_SIMD_BOOL_VSX_REGISTER(unsigned long, long);
1984s       |                                                             ^
...
1987s In file included from /usr/include/xsimd/xsimd.hpp:77:
1987s In file included from /usr/include/xsimd/types/xsimd_batch.hpp:520:
1987s In file included from /usr/include/xsimd/types/../arch/xsimd_isa.hpp:136:
1987s /usr/include/xsimd/types/../arch/./xsimd_vsx.hpp:429:20: error: no matching function for call to 'vec_ld'
1987s   429 |             return vec_ld(0, reinterpret_cast<const typename batch<T, A>::register_type*>(mem));
...
1987s In file included from /usr/include/xsimd/types/../arch/xsimd_isa.hpp:136:
1987s /usr/include/xsimd/types/../arch/./xsimd_vsx.hpp:752:20: error: no matching function for call to 'vec_st'
1987s   752 |             return vec_st(self.data, 0, reinterpret_cast<typename batch<T, A>::register_type*>(mem));
...
1987s In file included from /usr/include/xsimd/types/../arch/xsimd_isa.hpp:136:
1987s /usr/include/xsimd/types/../arch/./xsimd_vsx.hpp:436:20: error: no matching function for call to 'vec_vsx_ld'
1987s   436 |             return vec_vsx_ld(0, (typename batch<T, A>::register_type const*)mem);
...
1987s In file included from /usr/include/xsimd/types/../arch/xsimd_isa.hpp:136:
1987s /usr/include/xsimd/types/../arch/./xsimd_vsx.hpp:335:24: error: call to 'vec_cmpeq' is ambiguous
1987s   335 |             auto res = vec_cmpeq(self.data, other.data);
...
1987s In file included from /usr/include/xsimd/types/../arch/xsimd_isa.hpp:136:
1987s /usr/include/xsimd/types/../arch/./xsimd_vsx.hpp:222:20: error: call to 'vec_splats' is ambiguous
1987s   222 |             return vec_splats(val);
...
1987s In file included from /usr/include/xsimd/types/../arch/xsimd_isa.hpp:136:
1987s /usr/include/xsimd/types/../arch/./xsimd_vsx.hpp:130:20: error: call to 'vec_and' is ambiguous
1987s   130 |             return vec_and(self.data, other.data);
...
1987s In file included from /usr/include/xsimd/types/../arch/xsimd_isa.hpp:136:
1987s /usr/include/xsimd/types/../arch/./xsimd_vsx.hpp:759:20: error: no matching function for call to 'vec_vsx_st'
1987s   759 |             return vec_vsx_st(self.data, 0, reinterpret_cast<typename batch<T, A>::register_type*>(mem));
...
1987s In file included from /usr/include/xsimd/types/../arch/xsimd_isa.hpp:136:
1987s /usr/include/xsimd/types/../arch/./xsimd_vsx.hpp:335:24: error: call to 'vec_cmpeq' is ambiguous
1987s   335 |             auto res = vec_cmpeq(self.data, other.data);