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[Bug rtl-optimization/83575] [8 Regression] ICE: verify_flow_info failed (error: multiple hot/cold transitions found)
- From: "hubicka at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Tue, 09 Jan 2018 14:37:28 +0000
- Subject: [Bug rtl-optimization/83575] [8 Regression] ICE: verify_flow_info failed (error: multiple hot/cold transitions found)
- Auto-submitted: auto-generated
- References: <bug-83575-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83575
--- Comment #5 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
Once BB order is finalized we should not move them across partitions.
The problem seems to start with loop2_unroll which for some reason introduce
blocks of count 0 that looks like a misupdate of profile, this seems to trigger
some bug in bb-reorder with profile absent.
I will try to take a look.