[Bug c/125571] compiling with gcc 380 times slower than clang (19 minutes vs 3 seconds)

[ebotcazou at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=125571

--- Comment #19 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
> The only option is likely to go for a different PHI insertion algorithm that
> does not require iterated dominance frontiers (but by construction is then
> less optimal).

I suppose that it is too late to go back in time and do not go into SSA form
for cases like this?