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Re: Ping^2: A problem simplifying subregs of the hard frame pointer

From: Richard Henderson <rth at redhat dot com>
To: Bernd Schmidt <bernds at codesourcery dot com>
Cc: GCC Patches <gcc-patches at gcc dot gnu dot org>, Richard Earnshaw <rearnsha at arm dot com>
Date: Wed, 28 Jul 2010 09:57:35 -0700
Subject: Re: Ping^2: A problem simplifying subregs of the hard frame pointer
References: <4C36F1BC.8080401@codesourcery.com> <4C403CA8.50008@codesourcery.com> <4C496D19.3050309@codesourcery.com>

On 07/23/2010 03:21 AM, Bernd Schmidt wrote:
> Fix subreg handling of HARD_FRAME_POINTER_REGNUM (not an ARM patch,
> needs review) and revert a Thumb patch which seems to work around the
> problem:
> 
>   http://gcc.gnu.org/ml/gcc-patches/2010-07/msg00756.html

The reload patch looks ok.

The arm patch looks... odd.  What use is a define_expand that
only aborts?  Why not delete the pattern entirely, particularly
since it isn't a pattern name known by the middle-end?

r~

Follow-Ups:
- Re: Ping^2: A problem simplifying subregs of the hard frame pointer
  - From: Bernd Schmidt

References:
- A problem simplifying subregs of the hard frame pointer
  - From: Bernd Schmidt
- Ping: A problem simplifying subregs of the hard frame pointer
  - From: Bernd Schmidt
- Ping^2: A problem simplifying subregs of the hard frame pointer
  - From: Bernd Schmidt

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