Re: Problem with peephole to peephole2 conversion

[Paolo Bonzini <paolo dot bonzini at lu dot unisi dot ch>]

Ashwin Kolhe wrote:

> On 8/25/05, Paolo Bonzini <paolo.bonzini@lu.unisi.ch> wrote:
>  
>
> > I consider this to be less readable than the peep2 way to do it,
> > especially if your peephole2 had three or four instructions.  And
> > peep2_regno_dead_p uses an array (a circular buffer) so it's more
> > efficient.  Indeed dead_or_set_p even has a loop inside it.
> >
> > Paolo
> >    
>
>
> Thanks a lot for ur help. can u give me a pointer to the origin of
> peep2_reg_dead_p?
>  
Do you mean the source code?  A hint: grep ^func_name *.c will get to it 
for every function in gcc.

In this case it is in recog.c, look at peep2_reg_dead_p but also 
peep2_regno_dead_p.  There are other peep2_* functions you may use.

Paolo