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Re: [patch, mips] Fix for PR 54619, GCC aborting with -O -mips16

From: Steve Ellcey <sellcey at mips dot com>
To: Richard Sandiford <rdsandiford at googlemail dot com>
Cc: <gcc-patches at gcc dot gnu dot org>
Date: Wed, 19 Sep 2012 11:39:04 -0700
Subject: Re: [patch, mips] Fix for PR 54619, GCC aborting with -O -mips16
References: <6db5176b-8592-4c9e-b43b-4fe183d7995b@EXCHHUB01.MIPS.com> <87d31h29kn.fsf@talisman.home>

On Wed, 2012-09-19 at 18:42 +0100, Richard Sandiford wrote:

>   This hook is never called with an invalid address.
> 
> Since VOIDmode MEMs aren't valid, I think that should mean it's invalid
> to call this hook (and rtlanal.c:address_cost) with VOIDmode.  I never
> got time to look at that though.  (The culprit in the case I saw was
> tree-ssa-loop-ivopts.c.  Sandra had some improvements in this area,
> so maybe they would fix this too.)

Yes, the test case I put in PR 54619 also shows us getting there from
tree-ssa-loop-ivopts.c with VOIDmode.  I will look a bit more at this
when I get a chance.

Steve Ellcey
sellcey@mips.com

References:
- [patch, mips] Fix for PR 54619, GCC aborting with -O -mips16
  - From: Steve Ellcey
- Re: [patch, mips] Fix for PR 54619, GCC aborting with -O -mips16
  - From: Richard Sandiford

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