From: Jeffrey A Law <law@cygnus.com>
To: mark@markmitchell.com
Cc: amylaar@cygnus.co.uk, crux@pool.informatik.rwth-aachen.de,
meissner@cygnus.com, toon@moene.indiv.nluug.nl, egcs@cygnus.com
Subject: Re: Reload patch to improve 386 code
Date: Sun, 06 Sep 1998 01:09:00 -0000 [thread overview]
Message-ID: <24271.905058439@hurl.cygnus.com> (raw)
In-Reply-To: <199809060428.VAA02085@smtp.earthlink.net>
In message < 199809060428.VAA02085@smtp.earthlink.net >you write:
> I don't see why the base address tracking code should have to do
> anything. My plan was just to use different alias sets for each spill
> register (we have 2^32 of them, after all!). If you like, you could
> reuse these from function to function, so the maximum number of alias
> sets used up this was would be the number of spills in any one
> function. My guess is that if that gets close to 4 billion, we have
> worse problems.
>
> I'd be happy (delighted, even) to implement this, but I'd like a test
> case that someone things will benefit. (I am in *no* way doubting the
> existence of such a thing, but having one would allow me to verify my
> work.)
Just seemed easier to have a single alias set for spills. I'm not
particularly partial to either solution. They should both work.
As for a testcase. Who knows. I would think it would be reasonably
straightforward to build one.
ANy benefit right now would be in sched2 and possibly reload_cse since
we don't have generalized spill code motion yet.
Presumably we'd need a loop and something in the loop needs to be
spilled to the stack and we need unrelated memory accesses throuh a
pointer which we know nothing about.
jeff
next prev parent reply other threads:[~1998-09-06 1:09 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <Pine.SOL.3.90.970819095143.291G-100000@starsky.informatik.rwth-aachen.de>
1998-09-04 5:03 ` Jeffrey A Law
1998-09-04 5:05 ` Bernd Schmidt
1998-09-04 22:36 ` Joern Rennecke
1998-09-05 4:45 ` Jeffrey A Law
1998-09-05 15:49 ` Joern Rennecke
1998-09-05 15:44 ` Jeffrey A Law
1998-09-06 1:09 ` Mark Mitchell
1998-09-06 1:09 ` Jeffrey A Law [this message]
1998-09-07 9:48 ` Bernd Schmidt
1998-09-07 19:09 ` Joern Rennecke
1998-09-07 18:26 ` Jeffrey A Law
1998-09-07 19:09 ` Jeffrey A Law
1998-09-04 21:38 ` Joern Rennecke
1998-09-04 21:38 ` Jeffrey A Law
1997-08-21 16:51 Problems on PowerPC David Edelsohn
1997-08-21 17:37 ` Reload patch to improve 386 code Bernd Schmidt
-- strict thread matches above, loose matches on Subject: below --
1997-08-21 16:51 Joern Rennecke
1997-08-21 15:20 egcs repository Joel Sherrill
1997-08-21 15:47 ` Reload patch to improve 386 code Bernd Schmidt
1997-08-19 19:00 Joern Rennecke
1997-08-19 8:50 Jakub Jelinek
1997-08-19 7:36 egcs: A new compiler project to merge the existing GCC forks (fwd) Robert Wilhelm
1997-08-19 8:08 ` Reload patch to improve 386 code Bernd Schmidt
1997-08-19 8:08 ` Bernd Schmidt
1997-08-19 8:08 ` Jeffrey A Law
1997-08-18 20:47 Mike Meissner
1997-08-18 20:46 Joern Rennecke
1997-08-18 18:55 David S. Miller
1997-08-18 19:09 ` Jeffrey A Law
1997-08-18 15:36 Toon Moene
1997-08-18 15:11 meissner
1997-08-18 14:53 Monday morning Philippe Laliberte
1997-08-18 14:54 ` Reload patch to improve 386 code Jeffrey A Law
1997-08-18 14:53 meissner
1997-08-18 14:53 Toon Moene
1997-08-18 8:13 Test result for 970814 on native sparc-sun-solaris2.5.1 Klaus Kaempf
1997-08-18 8:22 ` Reload patch to improve 386 code Bernd Schmidt
1997-08-18 10:11 ` Bernd Schmidt
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