[Bug target/109949] new test case experimental/simd/pr109261_constexpr_simd.cc in r12-9647-g3acbaf1b253215 fails

[mkretz at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109949

--- Comment #4 from Matthias Kretz (Vir) <mkretz at gcc dot gnu.org> ---
With -mcpu=power10 I see the issue. The problem has been there all the time and
only surfaced with this test. (It should also have shown on `make check-simd`
in libstdc++.)