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Re: Dead code removal before sibcall pass

From: Jan Hubicka <jh at suse dot cz>
To: Jan Hubicka <jh at suse dot cz>
Cc: Richard Henderson <rth at redhat dot com>, gcc-patches at gcc dot gnu dot org,matz at suse dot de
Date: Fri, 23 May 2003 20:19:00 +0200
Subject: Re: Dead code removal before sibcall pass
References: <20030521211406.GC1689@kam.mff.cuni.cz> <20030522180710.GE2016@redhat.com> <20030522213811.GB30092@kam.mff.cuni.cz>

> > On Wed, May 21, 2003 at 11:14:06PM +0200, Jan Hubicka wrote:
> > > this patch enables dead code removal before sibcall pass making more sibcalls
> > > to be discovered.
> > 
> > How often does this happen in real life, as opposed to
> > silly test cases?
> The removal of dead code is pretty common, of course.  I didn't made much
> data on how much it affects the amount of found sibcalls but it looks
> easy enought to do and it is always better to kill dead insns in time.
> I will try to bootstrap GCC and count it.
There are no changes in GCC bootstrap times, there are 10 extra sibcalls
in libstdc++ build, so not big deal.
On the other hand I didn't managed to measure any slowdowns.

Honza
> 
> Honza
> > 
> > 
> > r~

References:
- Dead code removal before sibcall pass
  - From: Jan Hubicka
- Re: Dead code removal before sibcall pass
  - From: Richard Henderson
- Re: Dead code removal before sibcall pass
  - From: Jan Hubicka

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