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Re: IRA copy heuristics
On Thu, Sep 4, 2008 at 7:39 PM, Vladimir Makarov <vmakarov@redhat.com> wrote:
> Meanwhile I am going to submit your second patch with an added
> comment. The patch permits gcc to generate the same quality code as
> before your first patch.
Why?
As Richard said before:
"... it changes
the heuristics _without any explanation of why this is necessary_.
IMO, that's unacceptable for our shiny, new (and generally very nice)
register allocator. And I think it's unacceptable even if it happens
to fix a performance regression."
The patch does not seem to have any justification other than it fixes the
symptom.
David