[Bug tree-optimization/58653] [4.7/4.8/4.9 Regression] wrong code (segfaults) at -O3 on x86_64-linux-gnu in 64-bit mode (affecting gcc 4.6 to trunk)

[mpolacek at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58653

--- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
It's the loop unswitching.