[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 #14 from Segher Boessenkool <segher at gcc dot gnu.org> ---
I'm not sure how to read your remark.  An insn where the result is
not used is not on the critical path by definition; and you seem to
be arguing for -fno-sched-spec by default?