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Re: RFA: DSE replace_read revisited

From: Richard Sandiford <rsandifo at nildram dot co dot uk>
To: bonzini at gnu dot org
Cc: gcc-patches at gcc dot gnu dot org
Date: Wed, 31 Oct 2007 08:31:56 +0000
Subject: Re: RFA: DSE replace_read revisited
References: <87ejff7bhs.fsf@firetop.home> <472599AB.5030404@gnu.org> <873avtr3pb.fsf@firetop.home> <47271D02.2020203@lu.unisi.ch>

Paolo Bonzini <paolo.bonzini@lu.unisi.ch> writes:
> BTW, do you know the circumstances under which you get a subreg/s/v?  It 
> seems like dead code to me and the attached patch bootstraps.

It's for ptr_extend promotion AIUI.

Richard

Follow-Ups:
- Re: RFA: DSE replace_read revisited
  - From: Andrew Pinski

References:
- RFA: DSE replace_read revisited
  - From: Richard Sandiford
- Re: RFA: DSE replace_read revisited
  - From: Paolo Bonzini
- Re: RFA: DSE replace_read revisited
  - From: Richard Sandiford
- Re: RFA: DSE replace_read revisited
  - From: Paolo Bonzini

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