https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105771
--- Comment #6 from Franck Behaghel <franckbehaghel_gcc at protonmail dot com> --- Hello, > Does adding -fno-strict-aliasing fix the issue? Right, it does. > I think you have an aliasing violation here. I can not say if we have aliasing violation here. My understanding is that AV happens when mixing pointer type referring to the same address. >I think the way to fix the code is to do this: >transpose_upper_to_lower (mat,&mat); It does not change the result. The issue is still present. > -fno-loop-unroll-and-jam fixes it. Can't check trunk right now whether it's > fixed. I can confirm this too. Regards, Franck
