https://bugs.llvm.org/show_bug.cgi?id=45928
Bug ID: 45928
Summary: [MachineScheduler] -misched-cutoff option seems broken
Product: libraries
Version: 10.0
Hardware: PC
OS: Linux
Status: NEW
Severity: enhancement
Priority: P
Component: Common Code Generator Code
Assignee: unassignedb...@nondot.org
Reporter: pauls...@linux.vnet.ibm.com
CC: llvm-bugs@lists.llvm.org
Created attachment 23487
--> https://bugs.llvm.org/attachment.cgi?id=23487&action=edit
testcase
I am getting a lot of strange errors with this option (@ e737847):
llc -O3 -mcpu=z13 -misched-cutoff=100 -o crash0.s crash0.ll
crashes after a few times on SystemZ.
with a cutoff=10, it crashes nearly every time.
The crashes are different at different times. It seems that the DAG has reached
its limit but still some scheduling is attempted later on after the DAG has
been rebuilt...
Is this option still used by anyone? I see it was added way back in 2012...
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