[Bug tree-optimization/122456] [16 regression] LTO+profiledbootstrap failure on aarch64 since r16-4604-g8b9cd6490ce507

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=122456

--- Comment #8 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #7)
> (In reply to Andrew Pinski from comment #6)
> > (In reply to Andrew Macleod from comment #5)
> > > It does not reproduce on x86_64 either...
> > 
> > Hmm, that might give me an idea. Maybe someone is misusing char? thinking it
> > is signed but on aarch64 it is unsigned by default.
> > Maybe one thing to try is to force unsigned char by default for x86_64 or
> > force signed char by default for aarch64. 
> > 
> > That is change:
> > #define DEFAULT_SIGNED_CHAR 0
> > 
> > in aarch64/aarch64.h to 1.
> > 
> > or define it to 0 in i386/i386.h.
> 
> If I get sometime tomorrow I will do this experiment unless someone beats me
> to it.

That experiment failed with the same failure as reported here.