[Bug debug/95360] inconsistent behaviors at -O0

[yangyibiao at hust dot edu.cn]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95360

--- Comment #6 from Yibiao Yang <yangyibiao at hust dot edu.cn> ---
(In reply to Jonathan Wakely from comment #2)
> (In reply to Yibiao Yang from comment #0)
> > As showed, Line 6 is hit first and then hit Line 7 with stepi.
> > However, when using step, gdb is first hit Line 7 and then hit Line 6.
> > This is an inconsistent behaviors between stepi and step
> 
> Why is that a bug? Why is it a GCC bug?

To be honest, I am not sure whether this is a gcc bug or a gdb bug. I am very
sorry for that. 
I report it here as I doubt that the line table is generated incorrectly by
compilers.