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[Bug target/79570] [5/6/7 Regression] ICE in sel-sched-ir.c:4534 in pr69956.c
- From: "aoliva at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Tue, 21 Feb 2017 01:13:31 +0000
- Subject: [Bug target/79570] [5/6/7 Regression] ICE in sel-sched-ir.c:4534 in pr69956.c
- Auto-submitted: auto-generated
- References: <bug-79570-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79570
--- Comment #8 from Alexandre Oliva <aoliva at gcc dot gnu.org> ---
> Alexandre, do you recall why debug insns at heads of basic blocks are special?
I'm afraid I don't remember, but if I had to guess, I'd say it's because debug
insns normally wouldn't be at the border of scheduling groups, but if they are
at the top of a BB, then they might, and then they require closer attention to
keep debug and non-debug compilations in sync.