Re: --disable-checking bootstrap failure

[Nathan Sidwell <nathan at codesourcery dot com>]

Eric Christopher wrote:
> On Fri, 2004-09-10 at 09:24, Nathan Sidwell wrote:
>
> > I have tracked the --disable-checking bootstrap failure to the assertification
> > of tree-cfg.c.  However, the bug is not a misapplied assert, or
> > an assert with sideeffects. It must reside elsewhere.
> >
> > I attach a patch which reinserts the check with an abort, but this is
> > obviously papering over the problem.
> >
> >
> > I've attached a preprocessed tree-cfg.i file, with this patch applied
> > (line 24410).  Removing that line causes miscompilation of the file
> > on (at least) i686-pc-linux-gnu, with '-O2 -g'.
> >
> > It's getting to the end of the day here, and I'm going to have another
> > learning curve figuring out where to look next.  anyone want to help?
>
>
> I've got a little bit so I looked some and tracked it down to -O1
> -fno-tree-dce that compiles and -O1 gets stuck in a loop. So it's a
> conversion somewhere in dce that's causing it. I'll look a bit more, but
> wanted to update.

compiling that .i I posted (with or without the offending line), using
a checking compiler gets me different ICES with -O1 with/without
-fno-tree-dce.

not good.

nathan

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