[Bug target/54412] minimal 32-byte stack alignment with -mavx on 64-bit Windows
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=54412 --- Comment #43 from Avraham Adler --- Thank you, Dmitry, but that particular solution may not be possible for me. When I try compiling with -mstackrealign -mpreferred-stack-boundary=5 -mincoming-stack-boundary=5 instead of forcing unaligned moves I get "cc1.exe: error: '-mpreferred-stack-boundary=5' is not between 3 and 4". Is that this bug in a different form, something that should be filed separately, or known and intended behavior?
[Bug target/54412] minimal 32-byte stack alignment with -mavx on 64-bit Windows
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=54412 --- Comment #41 from Avraham Adler --- It has been a few years since the last comment. I recently got hit by this bug for the first time in about a decade and a half of compiling R for Windows 64 using GCC 13.2.0 as packaged in Rtools44 [1]. Does it remain true that the only option to get around this bug without killing all AVX2 is to pass "-Wa,-muse-unaligned-vector-move" when compiling using GCC on Windows 64? Thank you. [1] https://stat.ethz.ch/pipermail/r-sig-windows/2024q1/000113.html
