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

[marxin at gcc dot gnu.org]

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

--- Comment #75 from Martin Liška <marxin at gcc dot gnu.org> ---
(In reply to David Binderman from comment #74)
> (In reply to Martin Liška from comment #72)
> > You will manage, it's not rocket science.
> > 
> > So please, add break point at the place it triggers the ICE and do:
> > 
> > (gdb) p &ptr1->x_help_flag
> > (gdb) p &ptr2->x_help_flag
> 
> For this to work, I had to replace the options-save.o with a version
> compiled by -O0 and that made the problem go away ;-<

Or you would have to print &ptr1->x_help_flag with a printf and then
use gdb for the memory.

> 
> I am still happy to walk away from this bug report. It is known
> to occur on only one variant of one architecture and it is hard
> to reproduce. I can think of better things to work on in gcc.

Ok...

> 
> As far as finding a machine with a bdver2 architecture, I suspect
> any more recent AMD machine would be fine. 
> 
> Has no one checked the compile farm ?

No, there's not a bdver2 machine.