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Re: Fold constant shifts in combine

From: Jan Hubicka <jh at suse dot cz>
To: Neil Booth <neil at daikokuya dot co dot uk>
Cc: Jan Hubicka <jh at suse dot cz>, gcc-patches at gcc dot gnu dot org, rth at redhat dot com
Date: Thu, 20 Feb 2003 10:24:25 +0100
Subject: Re: Fold constant shifts in combine
References: <20030219175819.GF11112@kam.mff.cuni.cz> <20030219204233.GC10335@daikokuya.co.uk>

> Jan Hubicka wrote:-
> 
> > Most of the shifts exceeding argument type are already simplified by the
> > generic code, but in some cases it does not match.
> 
> Isn't it better to fix wherever they're falling through or being
> generated?  Otherwise, if they are eventually fixed, we have stale code
fold_const can not simplify this as it needs information from two
separate statements.
Or if you are refering to source code, it comes from automatically
generated one.

Honza
> that no-one really knows if it does anything useful.
> 
> Neil.

References:
- Fold constant shifts in combine
  - From: Jan Hubicka
- Re: Fold constant shifts in combine
  - From: Neil Booth

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