public inbox for gcc-bugs@sourceware.org
help / color / mirror / Atom feed
From: "amodra at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/44075]  New: __builtin_eh_return miscompiled
Date: Tue, 11 May 2010 09:47:00 -0000	[thread overview]
Message-ID: <bug-44075-1057@http.gcc.gnu.org/bugzilla/> (raw)

At any optimisation level other than -O0, it seems that __builtin_eh_return
loses its handler arg.  For -m32 -O2 -S the following:

long offset;
void *handler;

void foo (void)
{
  __builtin_eh_return (offset, handler);
}

compiles to:

foo:
        stwu 1,-32(1)
        lis 9,offset@ha
        mflr 0
        stw 0,36(1)
        stw 3,16(1)
        stw 4,20(1)
        stw 5,24(1)
        stw 6,28(1)
        lwz 10,offset@l(9)
        lwz 0,36(1)
        lwz 3,16(1)
        lwz 4,20(1)
        lwz 5,24(1)
        mtlr 0
        lwz 6,28(1)
        addi 1,1,32
        add 1,1,10
        blr


-- 
           Summary: __builtin_eh_return miscompiled
           Product: gcc
           Version: 4.4.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: amodra at gmail dot com
GCC target triplet: powerpc*-*-linux


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44075


             reply	other threads:[~2010-05-11  9:47 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-05-11  9:47 amodra at gmail dot com [this message]
2010-05-12 11:40 ` [Bug target/44075] " amodra at gmail dot com
2010-05-14  0:35 ` amodra at gcc dot gnu dot org
2010-05-17 13:41 ` bergner at gcc dot gnu dot org
2010-06-04  4:57 ` amodra at gcc dot gnu dot org
2010-06-04  4:57 ` amodra at gcc dot gnu dot org
2010-06-04  4:58 ` amodra at gcc dot gnu dot org
2010-06-04  4:59 ` amodra at gmail dot com

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-44075-1057@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).