[Bug middle-end/58387] [4.9 Regression] wrong code at -Os and above on x86_64-linux-gnu (both 32-bit and 64-bit modes)

[law at redhat dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58387

--- Comment #10 from Jeffrey A. Law <law at redhat dot com> ---
Looks like make_range_step is getting miscompiled.  Still trying to figure out
how/why.