This is the mail archive of the gcc@gcc.gnu.org mailing list for the GCC project.

Index Nav:	[Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav:	[Date Prev] [Date Next]	[Thread Prev] [Thread Next]
Other format:	[Raw text]

Re: possible regression... where to look at?

From: Dmitry <diwil at spec dot ru>
To: Richard Henderson <rth at redhat dot com>
Cc: gcc at gcc dot gnu dot org
Date: Mon, 15 Mar 2004 21:14:16 +0300
Subject: Re: possible regression... where to look at?
References: <200403121526.06765.diwil@spec.ru> <20040312233035.GA27743@redhat.com>

Richard,
This happens regardless to the rtx_cost value.
So, currently shift costs COSTs_N_INSNS (10) whereas and costs 2 of them.

Even when I undefine all 'cost' stuff from the code it behaves the same.

Cheers,
Dmitry.

On Saturday 13 March 2004 02:30, Richard Henderson wrote:
> On Fri, Mar 12, 2004 at 03:26:06PM +0300, Dmitry wrote:
> > Is it general gcc-3.4 regression or I have to define something extra?
>
> If you have your rtx_cost set up such that shift is more expensive
> than and, then I'd classify it as a bug.
>
>
> r~

References:
- possible regression... where to look at?
  - From: Dmitry
- Re: possible regression... where to look at?
  - From: Richard Henderson

Index Nav:	[Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav:	[Date Prev] [Date Next]	[Thread Prev] [Thread Next]