[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 #64 from David Binderman <dcb314 at hotmail dot com> ---
(In reply to David Binderman from comment #63)
> (In reply to Martin Liška from comment #62)
> > Can't reproduce with the current master:
> 
> Righto. This is proving unexpectedly hard to reproduce.
> 
> EITHER: I search various values of march= to find out which
> ones work and which ones don't.

Works fine with -march=amdfam10, broken with -march=bdver2.

I have no idea how to work out the halfway point between these two
architectures.