attribute data structure rewrite

[Mark Mitchell]

Geoffrey Keating wrote:

> As a precondition for other compile speed improvements, I've been 
> rewriting the way that GCC represents attributes.  The result is a 
> medium-size patch that touches every language and many targets (a 
> surprising number of targets don't define any special attributes at all).
>
> 1. Do we think this would be acceptable for stage 3, or should I make 
> a branch?

It might be acceptable for Stage 3 if the subsequent follow-on patches 
demonstrated a noticable performance improvement.  It should be a branch 
until you can demonstrate that improvement.  The final decision on 
acceptability will probably hinge on how mechanical the patch is: even 
if large, if it is quite mechanical (as I would anticipate), that will 
make it less worrisome.

-- 
Mark Mitchell
CodeSourcery, LLC
(916) 791-8304
mark@codesourcery.com