[Bug target/61730] Cygwin AVX __m256i return value misaligned

[roland at rschulz dot eu]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61730

--- Comment #1 from Roland Schulz <roland at rschulz dot eu> ---
It is probably a duplicate of 54412 or 49001 (which seem duplicates of each
other). The bugs I found previous where about 16-byte alignment and that has
been fixed. But the 32-byte alignment required for AVX doesn't seem to be
supported under Windows (both under Cygwin and Mingw).