[Bug tree-optimization/69347] [6 regression] excessive compile time with -O2

[dcb314 at hotmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69347

--- Comment #16 from David Binderman <dcb314 at hotmail dot com> ---
I tried the original code with gcc trunk dated 20160125
and compilation time with -O2 and compiler built with
--enable-checking=yes is now downto about 100 seconds.

AFAIK, problem solved.