[Bug c/105771] matrix partial transposition with -O3

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105771

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
I think you have an aliasing violation here. Does adding -fno-strict-aliasing
fix the issue?