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Re: ARM: Enable scheduling for Thumb-2

From: Daniel Jacobowitz <drow at false dot org>
To: Ramana Radhakrishnan <ramana dot radhakrishnan at arm dot com>
Cc: gcc-patches at gcc dot gnu dot org, Richard Earnshaw <Richard dot Earnshaw at arm dot com>, Paul Brook <paul at codesourcery dot com>
Date: Sat, 14 Nov 2009 14:24:33 -0500
Subject: Re: ARM: Enable scheduling for Thumb-2
References: <20091110211129.GA30336@caradoc.them.org> <1258133079.23100.94.camel@e200593-lin.cambridge.arm.com>

On Fri, Nov 13, 2009 at 05:24:39PM +0000, Ramana Radhakrishnan wrote:
> 
> On Tue, 2009-11-10 at 16:11 -0500, Daniel Jacobowitz wrote:
> > I came across this ??? comment... in my testing, enabling scheduling
> > for Thumb-2 is size-neutral and has performance benefits ranging from
> > 1% to 20%.  A couple of performance tests regress, but they are
> > reasonable problems with non-clairvoyant register allocation
> > (something was spilled because scheduling increased lifetimes).
> > 
> 
> This broke CSiBe builds for -Os and Thumb2 - I've filed
> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42031
> 
> for this. Could you take a look at this ? 

Thanks for fixing this, Richard!

I'm surprised this did not show up in my testing...

-- 
Daniel Jacobowitz
CodeSourcery

Follow-Ups:
- Re: ARM: Enable scheduling for Thumb-2
  - From: Matthias Klose

References:
- ARM: Enable scheduling for Thumb-2
  - From: Daniel Jacobowitz
- Re: ARM: Enable scheduling for Thumb-2
  - From: Ramana Radhakrishnan

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