[Bug rtl-optimization/59811] [4.8/4.9 Regression] Huge increase in memory usage and compile time in combine

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59811

--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
No clear offender in combine.  Points at if_then_else_cond (14% of combine
time).
LRA slowness is calls to find_hard_regno_for, 93% of lra_assign ().