[Bug target/63206] Gcc 4.9.1 Generated code needlessly stacks r3

[pype_1999.geo at yahoo dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63206

--- Comment #2 from Pype <pype_1999.geo at yahoo dot com> ---
reproduced with tail-call + r3 stack bug on 
 4.8.3
 4.8.4
 4.9.2
 5.1
appears fixed in 
 5.3