[Bug middle-end/58479] [4.9 Regression] slow var-tracking on x86_64-linux at -O1 (and above) with -g, but checking disabled

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58479

--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Alex, your thoughts on this?