[Bug tree-optimization/65797] [5 regression] IPA ICF causes function to be emitted with no debug line info

[ian at airs dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65797

--- Comment #7 from Ian Lance Taylor <ian at airs dot com> ---
With gold's ICF, as I understand it, there is a function name and file/line
information for every function in the backtrace.  It may not be the name or the
file/line info you expect, but it's there.

What broke the Go testcase is that there was no information at all.

It's not urgent for Go, by the way, as I've committed a workaround.  But I
think it would be nice to fix for GCC 5 if possible.