public inbox for gcc-bugs@sourceware.org
help / color / mirror / Atom feed
From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/18446] We need to distinguish value extension and value truncation
Date: Fri, 02 Jun 2023 05:32:57 +0000	[thread overview]
Message-ID: <bug-18446-4-PjYTW9wc1y@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-18446-4@http.gcc.gnu.org/bugzilla/>

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=18446

--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
The gimple (tree) Level should be all well defined as we use abstract machine
to define it and there are no zero or sign extend dealing with upper bits that
are not part of the original program.

For the RTL level, it is slightly different but we don't do as much loop
optimizations there except for pull things out of the loop and some unrolling.

           reply	other threads:[~2023-06-02  5:32 UTC|newest]

Thread overview: expand[flat|nested]  mbox.gz  Atom feed
 [parent not found: <bug-18446-4@http.gcc.gnu.org/bugzilla/>]

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=bug-18446-4-PjYTW9wc1y@http.gcc.gnu.org/bugzilla/ \
    --to=gcc-bugzilla@gcc.gnu.org \
    --cc=gcc-bugs@gcc.gnu.org \
    /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).