Stanislav Mekhanoshin 799c50fe93 [AMDGPU] Avoid second rescheduling for some regions ...

If a region was not constrained by a high register pressure
and was not rescheduled without clustering we can skip
rescheduling it ClusteredLowOccupancyReschedule stage.

This improves scheduling speed by 25% on some kernels.

Differential Revision: https://reviews.llvm.org/D97506

2021-02-26 12:29:37 -08:00

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