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Re: Duplicate unspec instruction entries in rs6000.md?

From: Dale Johannesen <dalej at apple dot com>
To: Mike Stump <mrs at apple dot com>
Cc: gcc at gcc dot gnu dot org, Dale Johannesen <dalej at apple dot com>, Daniel Jacobowitz <drow at mvista dot com>
Date: Wed, 14 Jan 2004 13:01:37 -0800
Subject: Re: Duplicate unspec instruction entries in rs6000.md?
References: <4D09D5AE-46D3-11D8-BCF6-003065A77310@apple.com>

On Jan 14, 2004, at 12:50 PM, Mike Stump wrote:

On Wednesday, January 14, 2004, at 11:56 AM, Daniel Jacobowitz wrote:
On Wed, Jan 14, 2004 at 10:54:52AM -0800, Syd Polk wrote:
Is it ok for an UNSPEC and an UNSPEC_VOLATILE to have the same index
number?
Yes.  The UNSPECs are used in (unspec) RTL and the UNSPEC_VOLATILEs in
(unspec_volatile) RTL.
Unless we have number pressure, I thought it would be good to not have them overlap. I think one table for both might be able to avoid some confusion some of the time, any competing factors that make this a bad idea?

Or two tables and different series, say even/odd or positive/negative.

References:
- Re: Duplicate unspec instruction entries in rs6000.md?
  - From: Mike Stump

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