[Bug rtl-optimization/70873] [7 Regressio] 20% performance regression at 482.sphinx3 after r235442 with -O2 -m32 on Haswell.

[bernds at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70873

--- Comment #2 from Bernd Schmidt <bernds at gcc dot gnu.org> ---
Can you give me more information what exactly is causing the stall - which
instructions are affected, and what needs to be done to avoid it?