From: Richard Henderson <rth@cygnus.com>
To: Mark Mitchell <mark@codesourcery.com>
Cc: geoffk@cygnus.com, gcc@gcc.gnu.org
Subject: Re: ssa bootstrap problem on x86 (cmpstrsi_1 pattern)
Date: Thu, 27 Jul 2000 14:48:00 -0000 [thread overview]
Message-ID: <20000727144813.A625@cygnus.com> (raw)
In-Reply-To: <20000727131011W.mitchell@codesourcery.com>
On Thu, Jul 27, 2000 at 01:10:11PM -0700, Mark Mitchell wrote:
> I think we need to bite the bullet and get the CLOBBERs out of there;
> otherwise, we are forced to do some kind of dataflow anlaysis in SSA...
Not at all. We have a register set, once, to an unspecified value.
That unspecified value is "valid" everywhere, just as with a register
set to a useful value.
r~
next prev parent reply other threads:[~2000-07-27 14:48 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2000-07-22 21:24 Geoff Keating
2000-07-23 0:50 ` Mark Mitchell
2000-07-24 11:51 ` Geoff Keating
2000-07-25 3:20 ` Richard Earnshaw
2000-07-26 22:55 ` Mark Mitchell
2000-07-27 12:50 ` Geoff Keating
2000-07-27 13:10 ` Mark Mitchell
2000-07-27 14:48 ` Richard Henderson [this message]
2000-07-27 15:13 ` Mark Mitchell
2000-07-27 15:14 ` Richard Henderson
2000-07-27 15:28 ` Mark Mitchell
2000-07-27 15:35 ` Richard Henderson
2000-07-27 15:42 ` Mark Mitchell
2000-07-27 15:46 ` Geoff Keating
2000-07-27 15:44 ` Geoff Keating
2000-07-27 16:01 ` Mark Mitchell
2000-07-27 16:59 ` Joern Rennecke
2000-07-27 17:22 ` Mark Mitchell
2000-07-27 17:57 ` Michael Meissner
2000-07-27 18:31 ` Mark Mitchell
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