Anyone got a tree or RTL corruption bug?

[Mike Stump]

> From: "Zack Weinberg" <zackw@stanford.edu>
> Date: Sun, 13 May 2001 19:40:20 -0700
> To: gcc@gcc.gnu.org

> I'm trying to make debug_tree/rtx more robust in the face of corrupt
> tree/RTL structure.  I finally have a sensible way to check whether
> dereferencing random pointers will cause a segmentation fault.  But
> now I can't find any corruption bugs to test them on.  Can anyone
> suggest something?

Oh, oh, oh, I have a testcase.  Take a tree and then use pr on it.
Then, take a rtx and do a pt on it.  I think it is a great testcase!