[Bug tree-optimization/104582] [11/12 Regression] Unoptimal code for __negdi2 (and others) from libgcc2 due to unwanted vectorization

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104582

--- Comment #10 from Richard Biener <rguenth at gcc dot gnu.org> ---
Btw, I think it makes sense to build libgcc with -mno-sse, maybe even
-mgeneral-regs-only.  Or globally with -fno-tree-vectorize (but we likely do
not want
%xmm uses for parameter setup either with the move-by-pieces changes - IIRC
I've seen uses in the unwinder code trapping because of a misaligned stack
in an executable).