[MachineScheduler] -misched-cutoff option seems broken


as reported at https://bugs.llvm.org/show_bug.cgi?id=45928, the -misched-cutoff option is old and apparently not working correctly when used (causes compilation crashes).

As discussed on Bugzilla, if no one is using this perhaps it should be removed?


Hi Jonas:

I personally think this is a handy feature, and never meet problem with PowerPC target.
Maybe we shouldn’t remove a feature just due to some bug (or even bug else exposed by it?)

From the description in bug report, looks like memory corruption issue?
Is it possible that it is due to target implementation?
eg: how SystemZ implement the target hooks, like pickNode etc.


Jinsong Ji (纪金松), PhD.

XL/LLVM on Power Compiler Development
E-mail: jji@us.ibm.com

graycol.gifJonas Paulsson via llvm-dev —05/22/2020 03:23:08 AM—Hi, as reported at INVALID URI REMOVED