Re: [PATCH, ARM] Delete obsolete patterns

[Richard Earnshaw <Richard dot Earnshaw at buzzard dot freeserve dot co dot uk>]

On Sat, 30 Jul 2005 20:37:45 +0200, "Giovanni Bajo" wrote:
> Richard Earnshaw <Richard.Earnshaw@buzzard.freeserve.co.uk> wrote:
> 
> > I've been meaning to do this for a while.  Now that we have
> > pre/post_modify the patterns that match the equivalent rtl sequences
> > are (at least in theory) redundant.  This patch removes them and thus
> > deletes a large chunk of code and most of the legacy define_peephole
> > insns on the ARM.
> 
> 
> What is the impact of this patch on code generation? Did you happen to test
> CSIBE?

I haven't measured it, but it *should* be zero if the pre/post_modify code 
in the rtl optimizers is working correctly.

Even if not, the effect is likely to be very small given how often these 
match.

R.