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Re: [PATCH] rs6000: Add "cannot_copy" attribute, use it (PR67788, PR67789)
- From: Segher Boessenkool <segher at kernel dot crashing dot org>
- To: David Edelsohn <dje dot gcc at gmail dot com>
- Cc: GCC Patches <gcc-patches at gcc dot gnu dot org>
- Date: Thu, 1 Oct 2015 12:39:26 -0500
- Subject: Re: [PATCH] rs6000: Add "cannot_copy" attribute, use it (PR67788, PR67789)
- Authentication-results: sourceware.org; auth=none
- References: <a9b51088209febfc8bb481884100aa1bb6b5245e dot 1443679075 dot git dot segher at kernel dot crashing dot org> <CAGWvnynh4og-d6ZUrFS7zJPTuYe2aQr6+xv=FA9FjO7EC3otuQ at mail dot gmail dot com>
On Thu, Oct 01, 2015 at 10:08:50AM -0400, David Edelsohn wrote:
> Is this expensive enough that it is worth limiting the definition of
> the hook to configurations that include 32-bit SVR4 support so that
> not every configuration incurs the overhead?
I don't think so. That won't save the call to the target hook, and
that is a big part of the overhead already.
Segher