Stanislav Mekhanoshin 4aa7fb7752 [AMDGPU] Revert scheduling to reduce spilling ...

We can revert region schedule if new schedule decreases occupancy.
However, if we already have only one wave we would accept any new
schedule even if it blows up register pressure. Such schedule may
result in quite heavy spilling which can be avoided if we reject
this new schedule.

Differential Revision: https://reviews.llvm.org/D72181

2020-01-03 15:20:21 -08:00

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