[Bug rtl-optimization/59429] Missed optimization opportunity in qsort-style comparison functions

[hjl.tools at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59429

--- Comment #1 from H.J. Lu <hjl.tools at gmail dot com> ---
gold has

--icf [none,all,safe]       Identical Code Folding. '--icf=safe' Folds ctors,
dtors and functions whose pointers are definitely not taken.

which should help it at link-time.