[Bug rtl-optimization/63577] [4.8/4.9/5 Regression]: Huge compile time and memory usage with -O and not -fPIC

[segher at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63577

--- Comment #8 from Segher Boessenkool <segher at gcc dot gnu.org> ---
It's not a very new regression, and it is quite risky in my opinion;
I prefer to have this dealt with in stage1.