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Re: [RFA][PATCH] Fix tree-optimization/59919

From: Jeff Law <law at redhat dot com>
To: Jakub Jelinek <jakub at redhat dot com>
Cc: gcc-patches <gcc-patches at gcc dot gnu dot org>
Date: Fri, 24 Jan 2014 09:51:24 -0700
Subject: Re: [RFA][PATCH] Fix tree-optimization/59919
Authentication-results: sourceware.org; auth=none
References: <52E1881B dot 7020009 at redhat dot com> <20140124105250 dot GO892 at tucnak dot redhat dot com> <52E2963E dot 8090207 at redhat dot com> <20140124164141 dot GS892 at tucnak dot redhat dot com>

On 01/24/14 09:41, Jakub Jelinek wrote:


The only downside is we lose the ability to backward propagate
through a typecast which feeds an argument in such a call.   But
that's probably not a big deal.


I couldn't actually reproduce any backwards propagation,
since now all pointer casts are useless, so the code to walk the pointer
casts is likely just dead.

I ran across some not terribly long ago and added similar code to DOM.You just need to try harder :-)



jeff

References:
- [RFA][PATCH] Fix tree-optimization/59919
  - From: Jeff Law
- Re: [RFA][PATCH] Fix tree-optimization/59919
  - From: Jakub Jelinek
- Re: [RFA][PATCH] Fix tree-optimization/59919
  - From: Jeff Law
- Re: [RFA][PATCH] Fix tree-optimization/59919
  - From: Jakub Jelinek

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