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Re: RFA: DSE replace_read revisited

From: Paolo Bonzini <bonzini at gnu dot org>
To: gcc-patches at gcc dot gnu dot org, rsandifo at nildram dot co dot uk
Date: Mon, 29 Oct 2007 09:28:27 +0100
Subject: Re: RFA: DSE replace_read revisited
References: <87ejff7bhs.fsf@firetop.home>

The TCP increase is 3 instructions rather than 1 because of a missed
SIGN_EXTEND optimisation in simplify-rtx.c.  I have a separate patch
for that, but I'm not convinced it's stage 3 material.

It might be worth submitting anyway, since it is in some sense a regression.

Paolo

Follow-Ups:
- Re: RFA: DSE replace_read revisited
  - From: Richard Sandiford

References:
- RFA: DSE replace_read revisited
  - From: Richard Sandiford

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