[Bug middle-end/60484] [4.7/4.8/4.9 Regression] -fdump-rtl-expand and attribute optimize gives incorrect dump file path

[mpolacek at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60484

--- Comment #3 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Anyway, this is because finish_options is called for every optimize attribute
(handle_optimize_attribute->parse_optimize_attribute->decode_options->finish_options)
+ one more time for command line options and every time it adds the directory
prefix.  I guess we should add the directory prefix just once.