[llvm] [AMDGPU] Reset minOccupancy if unclustered schedule was not run for any region. (PR #162025)

[Dhruva Chakrabarti via llvm-commits]

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@@ -966,6 +966,7 @@ void GCNScheduleDAGMILive::runSchedStages() {
     if (!Stage->initGCNSchedStage())
       continue;
 
+    bool IsAnyRegionScheduled = false;
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dhruvachak wrote:

> Can you make this part of the `UnclusteredHighRPStage`'s state instead of the scheduler itself? I think it makes more sense since the base `finalizeGCNSchedStage` implementation doesn't use this and neither do the other stages.

Agreed. Thanks for the suggestion. I moved the tracking to UnclusteredHighRPStage in the updated patch. 

https://github.com/llvm/llvm-project/pull/162025