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[Bug middle-end/68664] [6/7 Regression] Speculative sqrt in c-ray main loop causes large slow down
- From: "segher at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Tue, 31 Jan 2017 12:30:32 +0000
- Subject: [Bug middle-end/68664] [6/7 Regression] Speculative sqrt in c-ray main loop causes large slow down
- Auto-submitted: auto-generated
- References: <bug-68664-4@http.gcc.gnu.org/bugzilla/>
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?