From: Joern Rennecke <amylaar@cygnus.co.uk>
To: law@cygnus.com
Cc: amylaar@cygnus.co.uk, wilson@cygnus.com, egcs@cygnus.com
Subject: Re: patch for update_flow_info REG_WAS_0
Date: Fri, 13 Feb 1998 02:16:00 -0000 [thread overview]
Message-ID: <199802131014.KAA10625@phal.cygnus.co.uk> (raw)
In-Reply-To: <25382.887357891@hurl.cygnus.com>
> One might argue that the note should have been removed when the
> insn was deleted. Can you look into that?
I first looked at the REG_WAS_0 description in rtl.texi. It appears that
is a known fact that the insn might be deleted. So I presume that that's
OK, and we have to deal with it.
@findex REG_WAS_0
@item REG_WAS_0
The single output of this insn contained zero before this insn.
@var{op} is the insn that set it to zero. You can rely on this note if
it is present and @var{op} has not been deleted or turned into a @code{note};
its absence implies nothing.
@end table
These notes describe linkages between insns. They occur in pairs: one
insn has one of a pair of notes that points to a second insn, which has
the inverse note pointing back to the first insn.
next prev parent reply other threads:[~1998-02-13 2:16 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
1998-02-12 18:02 Joern Rennecke
1998-02-13 2:04 ` Jeffrey A Law
1998-02-13 2:16 ` Joern Rennecke [this message]
1998-02-13 10:31 ` Jeffrey A Law
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=199802131014.KAA10625@phal.cygnus.co.uk \
--to=amylaar@cygnus.co.uk \
--cc=egcs@cygnus.com \
--cc=law@cygnus.com \
--cc=wilson@cygnus.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).