public inbox for gcc-bugs@sourceware.org
help / color / mirror / Atom feed
From: "danfuzz at milk dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/17019] THUMB -O1: bad code generated for simple for loop
Date: Fri, 13 Aug 2004 20:07:00 -0000	[thread overview]
Message-ID: <20040813200727.27116.qmail@sourceware.org> (raw)
In-Reply-To: <20040813164249.17019.danfuzz@milk.com>


------- Additional Comments From danfuzz at milk dot com  2004-08-13 20:07 -------
If I compile with -dP, I find that the bmi instruction gets annotated like this:

@(jump_insn 44 74 72 (parallel [
@            (set (pc)
@                (if_then_else (lt (plus:SI (reg/v:SI 0 r0 [orig:68 a ] [68])
@                            (const_int 1 [0x1]))
@                        (const_int 0 [0x0]))
@                    (label_ref 45)
@                    (pc)))
@            (clobber (reg:SI 3 r3))
@        ]) 176 {*addsi3_cbranch_scratch} (insn_list 3 (nil))
@    (expr_list:REG_UNUSED (reg:SI 3 r3)
@        (expr_list:REG_BR_PROB (const_int 3600 [0xe10])
@            (nil))))
@ 0x0004
        bmi     .L7     @ 44    *addsi3_cbranch_scratch/3       [length = 4]

This seems to correspond to arm.md around line 6211.

Assuming that that is indeed the right pattern to match, then it looks like either there's a missing case 
in the switch statement or the which_alternative variable got set incorrectly.

-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17019


  parent reply	other threads:[~2004-08-13 20:07 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2004-08-13 16:42 [Bug target/17019] New: " danfuzz at milk dot com
2004-08-13 16:43 ` [Bug target/17019] " danfuzz at milk dot com
2004-08-13 16:45 ` danfuzz at milk dot com
2004-08-13 17:18 ` danfuzz at milk dot com
2004-08-13 17:23 ` danfuzz at milk dot com
2004-08-13 17:54 ` danfuzz at milk dot com
2004-08-13 20:07 ` danfuzz at milk dot com [this message]
2004-08-13 20:11 ` danfuzz at milk dot com
2004-08-13 21:23 ` danfuzz at milk dot com
2004-08-13 21:34 ` [Bug target/17019] THUMB: bad switch statement in md code for addsi3_cbranch_scratch danfuzz at milk dot com
2004-08-13 21:36 ` danfuzz at milk dot com
2004-08-16 14:53 ` rearnsha at gcc dot gnu dot org
2004-08-17 10:02 ` cvs-commit at gcc dot gnu dot org
2004-08-17 10:18 ` cvs-commit at gcc dot gnu dot org
2004-08-17 11:32 ` cvs-commit at gcc dot gnu dot org
2004-08-17 11:33 ` rearnsha at gcc dot gnu dot org

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=20040813200727.27116.qmail@sourceware.org \
    --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).