[Bug middle-end/53144] [4.7/4.8 Regression] PPRE infinite loop

[hjl.tools at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53144

--- Comment #4 from H.J. Lu <hjl.tools at gmail dot com> 2012-04-28 15:53:10 
UTC ---
(In reply to comment #3)
> 
> H.J., can you try bisecting this?

Sure.  BTW, I created a new git based bisect tool. It works
quite well.