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Re: [PATCH]: Fix bootstrap compile time blowout on x86_64.


On Sat, 2006-12-09 at 12:20 +0100, Richard Guenther wrote:
> On 12/9/06, Maxim Kuvyrkov <mkuvyrkov@ispras.ru> wrote:
> > Hi!
> >
> > Thanks to Jan Hubicka an issue with compile time blowout came up.  Over
> > 80% of insn-attrtab.c compile time is spent in haifa-sched.c: check_cfg
> > () function which does sanity check of the whole CFG.  There are three
> > callers of check_cfg () at the moment: sched_init (), schedule_block ()
> > and sched_finish ().  While calls from sched_{init, finish} () are done
> > once per function the call from schedule_block () is invoked for every
> > single basic block.  Leaving only two of the three calls - sched_{init,
> > finish} () - will pretty much solve the problem.  Please find the patch
> > attached.
> >
> > OK for trunk and gcc-4_2-branch?

So this is only an issue with checking enabled, then why is this really
an issue?  Yes people might complain about the compile time speed for
bootstrap but this only happens while compiling stage2 if we do
--enable-checking=release.

Thanks,
Andrew Pinski


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