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From: "Amker.Cheng" <amker.cheng@gmail.com>
To: gcc@gcc.gnu.org
Subject: Question about the difference between two instruction scheduling  	passes
Date: Wed, 19 Aug 2009 22:51:00 -0000	[thread overview]
Message-ID: <e8b251c80908190744q56bfaac1k11561d52f2a381a1@mail.gmail.com> (raw)

Hi all:
   I'm currently studying implementation of instruction sched in gcc.

it is possible to schedule insns directly from queue in case
there is nothing better to do and there are still vacant dispatch slots
in the current cycle.

Gcc only does this work in the second pass, but what's the point?
Is it wrong or just not necessary  in the first sched pass?

Thanks.
-- 
Best Regards.

             reply	other threads:[~2009-08-19 14:44 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-08-19 22:51 Amker.Cheng [this message]
2009-08-19 23:26 ` Ian Lance Taylor
2009-08-19 23:47 ` Alex Turjan

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