This is the mail archive of the gcc-patches@gcc.gnu.org mailing list for the GCC project.

Index Nav:	[Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav:	[Date Prev] [Date Next]	[Thread Prev] [Thread Next]
Other format:	[Raw text]

Re: Scheduler: Save state at the end of a block

From: Andrey Belevantsev <abel at ispras dot ru>
To: Bernd Schmidt <bernds at codesourcery dot com>
Cc: GCC Patches <gcc-patches at gcc dot gnu dot org>
Date: Mon, 13 Aug 2012 16:57:20 +0400
Subject: Re: Scheduler: Save state at the end of a block
References: <5028D7D4.3090209@codesourcery.com>

On 13.08.2012 14:32, Bernd Schmidt wrote:

This is a small patch for sched-rgn that attempts to save DFA state at
the end of a basic block and re-use it in successor blocks. This was a
customer-requested optimization; I've not seen it make much of a
difference in any macro benchmarks.

FWIW, this was definitely helpful for sel-sched on ia64, as far as I recall, and likewise on some of the smaller tests.

Andrey

Bootstrapped and tested on x86_64-linux and also tested on c6x-elf. OK?

Bernd

References:
- Scheduler: Save state at the end of a block
  - From: Bernd Schmidt

Index Nav:	[Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav:	[Date Prev] [Date Next]	[Thread Prev] [Thread Next]