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Re: Limits of stage3 changes

From: Paolo Bonzini <bonzini at gnu dot org>
To: Steven Bosscher <stevenb dot gcc at gmail dot com>, GCC Development <gcc at gcc dot gnu dot org>
Date: Sat, 17 Nov 2007 12:49:53 +0100
Subject: Re: Limits of stage3 changes
References: <571f6b510711161443r4727c091h1f6f211b0a7c119a@mail.gmail.com>

My favorite example of this lack of follow-through is gcse.c.  It
computes reg-def chains and monotonic insn IDs. Guess what df-scan
provides?

This is great. I did that for combine and CSE, but I didn't know GCSE as well. From the description from my first read I like this patch, and I think you are the person that has studied GCSE more so I trust it a lot. (Most of this could be done in postreload GCSE too, by the way).

Paolo

References:
- Limits of stage3 changes
  - From: Steven Bosscher

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