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Re: RFC: machine specific alternative cost modifier

From: Joern Rennecke <joernr at arc dot com>
To: Ian Lance Taylor <iant at google dot com>
Cc: gcc at gcc dot gnu dot org
Date: Fri, 17 Oct 2008 19:03:56 +0100
Subject: Re: RFC: machine specific alternative cost modifier
References: <20081017150109.GB31579@elsdt-razorfish.arc.com> <m3od1j9kse.fsf@google.com>

On Fri, Oct 17, 2008 at 10:46:41AM -0700, Ian Lance Taylor wrote:
> 
> I think you could achieve the same result by writing multiple
> define_insn patterns and using the instruction predicate.

Yes, I could.  But that would quadruple my machine description,
which is already 169 KB, and it would make it harder to maintain.

I think overloading contraints would actually a more useful way to solve
this problem, if I can get it integrated.

Follow-Ups:
- Re: RFC: machine specific alternative cost modifier
  - From: Hans-Peter Nilsson

References:
- RFC: machine specific alternative cost modifier
  - From: Joern Rennecke
- Re: RFC: machine specific alternative cost modifier
  - From: Ian Lance Taylor

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