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Re: Speculative prefetching: report

From: David Edelsohn <dje at watson dot ibm dot com>
To: Dale Johannesen <dalej at apple dot com>
Cc: Andrew Pinski <pinskia at physics dot uc dot edu>, "gcc at gcc dot gnu dot org List" <gcc at gcc dot gnu dot org>, Zdenek Dvorak <rakdver at atrey dot karlin dot mff dot cuni dot cz>
Date: Tue, 12 Oct 2004 17:26:41 -0400
Subject: Re: Speculative prefetching: report
References: <4C13D718-1C83-11D9-BA32-000A95D7CD40@apple.com> <6119ECAD-1C85-11D9-BF4C-000A95D692F4@physics.uc.edu> <22305146-1C87-11D9-BA32-000A95D7CD40@apple.com>

	I would recommend opening two Bugzilla bug reports:

1) -fspeculative-prefetching consumes too much BE resources.
2) -fspeculative-prefetching should not be included in
-fprofile-generate/use because of the resource issue problems.

Then I would submit a patch for the second PR to remove
-fspeculative-prefetching from -fprofile-generate/use.

	This gives us concrete issues that we can track and the second
item is a regression from GCC 3.4 that we can ensure gets fixed before GCC
4.0 is released.

David

References:
- Speculative prefetching: report
  - From: Dale Johannesen
- Re: Speculative prefetching: report
  - From: Andrew Pinski
- Re: Speculative prefetching: report
  - From: Dale Johannesen

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