[Bug middle-end/68664] [6/7 Regression] Speculative sqrt in c-ray main loop causes large slow down

[segher at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68664

--- Comment #12 from Segher Boessenkool <segher at gcc dot gnu.org> ---
new_ready just adds insns to the ready list.  High latency isn't
directly a problem: if we can schedule a high latency insn early
speculatively, that is a _good_ thing!