https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97618
--- Comment #4 from Brecht Sanders <brechtsanders at users dot sourceforge.net> --- Found a smaller project to reproduce the issue with: building BLAKE3 v0.3.7 from https://github.com/BLAKE3-team/BLAKE3 also has the issue when building with GCC11 for 32-bit MinGW-w64. Here I noticed that compiling with -O0 works around the problem, so the issue must be in the compiler optimization for i686.
