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Re: Redundant instructions in loop optimization for x86-64?
- From: Jan Hubicka <hubicka at ucw dot cz>
- To: "H. J. Lu" <hjl at lucon dot org>
- Cc: gcc at gcc dot gnu dot org
- Date: Fri, 10 Sep 2004 11:50:23 +0200
- Subject: Re: Redundant instructions in loop optimization for x86-64?
- References: <20040910000026.GA25099@lucon.org>
> It seems that gcc 3.4 and 4.0 generate redundant instructions in loop
> optimization for x86-64:
>
> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17387
>
> Does anyone know why?
It is a zero extension GCC believe to be essential.
Honza
>
>
> H.J.