[Bug target/11087] gcc miscompiles raid1.c from linux kernel

[falk dot hueffner at student dot uni-tuebingen dot de]

PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11087



------- Additional Comments From falk dot hueffner at student dot uni-tuebingen dot de  2003-10-14 14:44 -------
Subject: Re:  gcc miscompiles raid1.c from linux kernel

"tst at worldonline dot ch" <gcc-bugzilla@gcc.gnu.org> writes:

> In which version/release the patch is included *and* the tarball is
> verified, that the patch is in?

In no release. It has been added to the 3.3 CVS branch and should
therefore be in the 3.3.2 release tarball when it gets created.

> So i tested gcc 2.95-3, 2.96, 3.3 and the new sources form cvs from
> yesterday (still open). And everyone crashs in raid1.c. 

Are you sure the patch was already in when you checked out gcc? Is it
mentioned in the changelog?

> I checked out the raid1.c standalone program, and it *never*
> crashs.

That is weird. It certainly does for me:

falk@juist:/tmp% uname -a                                                       Linux juist 2.6.0-test3 #2 Sat Aug 9 20:21:49 CEST 2003 alpha GNU/Linux
falk@juist:/tmp% gcc-3.3 --version
gcc-3.3 (GCC) 3.3.2 20031005 (Debian prerelease)
falk@juist:/tmp% wget --quiet "http://gcc.gnu.org/bugzilla/attachment.cgi?id=4161&action=view" -O raid1.c
falk@juist:/tmp% gcc-3.3 -O2 raid1.c && ./a.out
zsh: segmentation fault (core dumped)  ./a.out

The crash goes away with the patch.