[Bug tree-optimization/92860] [9/10/11/12 regression] Global flags affected by -O settings are clobbered by optimize attribute

[dcb314 at hotmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92860

--- Comment #46 from David Binderman <dcb314 at hotmail dot com> ---
(In reply to David Binderman from comment #43)
> Rebroken, this time during bootstrap, so much more serious.

> I'll have a go at dropping the -O3 -march=native back downto
> -O2 and see what happens.

-O2 fine. I'll try -O3 without the -march=native.