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Re: Empty loop elimination in 4.0 ?

From: Paolo Bonzini <bonzini at gnu dot org>
To: gcc at gcc dot gnu dot org
Date: Wed, 12 Jan 2005 09:09:27 +0100
Subject: Re: Empty loop elimination in 4.0 ?
References: <OF3DD3B111.8D577FDE-ON42256F85.00269B85-42256F85.002A3EC0@il.ibm.com> <41E287CC.8020301@adacore.com> <4qhpfk59.fsf@wanadoo.es> <5AED0E48-6312-11D9-A683-000A95D692F4@physics.uc.edu> <41E29055.5030507@adacore.com> <3E2AC2EC-6314-11D9-A683-000A95D692F4@physics.uc.edu> <41E29BB8.6040509@adacore.com> <pan.2005.01.11.16.12.11.165176@maihem.org> <41E42576.3060804@csr.unibo.it> <E19624BA-6405-11D9-A683-000A95D692F4@physics.uc.edu> <41E44DD8.2070902@csr.unibo.it>

Luca Benini wrote:

Andrew Pinski wrote:

We can convert it if the sizeof(*f) is 1 or if f is a pattern which can converted for use with memset.
How many code-line to optimize 128 (at most) cases over 2^32 cases (at least)?

Though, the common case of zeroing is caught by this optimization.

Paolo

References:
- Re: Empty loop elimination in 4.0 ?
  - From: Michael Veksler
- Re: Empty loop elimination in 4.0 ?
  - From: Robert Dewar
- Re: Empty loop elimination in 4.0 ?
  - From: Oscar Fuentes
- Re: Empty loop elimination in 4.0 ?
  - From: Andrew Pinski
- Re: Empty loop elimination in 4.0 ?
  - From: Robert Dewar
- Re: Empty loop elimination in 4.0 ?
  - From: Andrew Pinski
- Re: Empty loop elimination in 4.0 ?
  - From: Robert Dewar
- Re: Empty loop elimination in 4.0 ?
  - From: Tristan Wibberley
- Re: Empty loop elimination in 4.0 ?
  - From: Luca Benini
- Re: Empty loop elimination in 4.0 ?
  - From: Andrew Pinski
- Re: Empty loop elimination in 4.0 ?
  - From: Luca Benini

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