This is the mail archive of the mailing list for the GCC project.

Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]
Other format: [Raw text]

Re: --disable-checking bootstrap failure

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 Sidwell    ::   ::     CodeSourcery LLC    ::

Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]