No Subject

[David S. Miller]

From: "David S. Miller" <davem@pierdol.cobaltmicro.com>
To: dje@watson.ibm.com
CC: mark@markmitchell.com, law@cygnus.com, meissner@cygnus.com,
	egcs@cygnus.com
In-reply-to: < 9809182120.AA35006@marc.watson.ibm.com > (message from David
	Edelsohn on Fri, 18 Sep 1998 17:20:45 -0400)
Subject: Re: PowerPC build breakage caused by 8/25/98 loop.c change
References:  < 9809182120.AA35006@marc.watson.ibm.com >

   Date: Fri, 18 Sep 1998 17:20:45 -0400
   From: David Edelsohn <dje@watson.ibm.com>

	   I tried building a recent CVS checkout with loop.c reverted
   to version 1.65 on 8/25/98 prior to Mark's loop.c changes.
   Bootstrapping is successful.  Something about those changes
   (possibly the AVOID_CC_MODE_COPIES tweak?) causes PowerPC failures.

If this is your theory, can you test it by reverting the
AVOID_CC_MODE_COPIES parts of the changes?

I believe we've addressed most of the issues wrt. the loop load/store
hoisting.  And this 8/25 change fixes real bugs on any platform which
can create new pseudo registers during move_movables in loop.c

My more recent change to loop.c fixes a bug which existed long before
Mark's load store hoisting code went in, in particular it was
introduced by Rth's loop enhancements some time ago.

Later,
David S. Miller
davem@dm.cobaltmicro.com