[Bug rtl-optimization/69752] Reload removing instruction with side-effect

[andre.simoesdiasvieira at arm dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69752

--- Comment #1 from Andre Vieira <andre.simoesdiasvieira at arm dot com> ---
Tried it with GCC 5.2.1 and 6.0, all show the same behavior. For 4.9 I couldnt
reproduce the issue.