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[Bug rtl-optimization/79985] ICE in code_motion_path_driver, at sel-sched.c:6580
- From: "abel at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Mon, 13 Mar 2017 14:07:29 +0000
- Subject: [Bug rtl-optimization/79985] ICE in code_motion_path_driver, at sel-sched.c:6580
- Auto-submitted: auto-generated
- References: <bug-79985-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79985
--- Comment #5 from Andrey Belevantsev <abel at gcc dot gnu.org> ---
Well, we can special case this in sel-sched either along the lines of
df-scan.c, or even easier, just forbid any asm reordering given the DF hunk.
Generally speaking, we've been bitten a couple of times by this in the past
(i.e. by the difference between the DF code and the sched-deps view of the
dependencies between a pair of insns). It's just a consequence of the
situation when we lack in the RTL the single authoritative place about the insn
DF information.