[patch] AVR disable peephole2 when not safe (interrupts)

[Denis Chertykov]

Denis Chertykov <denisc@overta.ru> writes:

> Richard Henderson <rth@redhat.com> writes:
> 
> > On Sun, Dec 24, 2000 at 01:20:38PM +0300, Denis Chertykov wrote:
> > > As I understand GCC can choose a peephole2 scratch register which don't
> > > used by function and this register will be clobbered and not saved/restored
> > > in prologue/epilogue.
> > 
> > Yes.  And normally this doesn't matter, since the chosen register
> > is call-clobbered.  But with your "interrupt" functions, there are
> > no call-clobbered registers.

Richard ! You was right !

> 
> You wrong here !

I was wrong !

I have used my internal GCC with buggy registers definition.

Denis.