[Bug rtl-optimization/67396] [4.9/5/6 regression] Performance regression compiling variadic function with many arguments in RTL DSE

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67396

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Target|                            |x86_64-*-*
          Component|target                      |rtl-optimization
            Version|unknown                     |5.2.0
   Target Milestone|---                         |4.9.4
            Summary|[4.9/5.0 regression]        |[4.9/5/6 regression]
                   |Performance regression      |Performance regression
                   |compiling variadic function |compiling variadic function
                   |with many arguments         |with many arguments in RTL
                   |                            |DSE

--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
I suppose this is a quite old quadraticness in RTL DSE (or rather
find_base_term).