------- Additional Comments From law at redhat dot com 2004-12-02 15:56 -------
Subject: Re: [3.4/4.0 Regression] g++ crash with -O2
and -O3 on input file
On Wed, 2004-12-01 at 22:08 -0800, Richard Henderson wrote:
> On Wed, Dec 01, 2004 at 09:56:51PM -0700, Jeffrey A Law wrote:
> > * tree.h (save_eptr, save_filt): Now file scoped statics.
> > (honor_protect_cleanup_actions): Only create save_eptr and
> > save_filt if they do not already exist.
> > (lower_eh_constructs): Wipe all knowledge of save_eptr and
> > save_filt before returning.
>
> As I just discovered while working through the existance of these
> saves for DannyB, this transformation is incorrect and indeed
> invalidates the entire reason for this save/restore.
>
> The best that we could do is a stack of variable pairs so that
> nested eh regions are handled properly.
>
> Sorry for my earlier misdiagnosis.
Worse things have happened in this world. The patch has been reverted.
jeff
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15855
