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

[Matt Arsenault via llvm-commits]

================
@@ -0,0 +1,735 @@
+# RUN: llc -mtriple=amdgcn -mcpu=gfx1100 -start-before=machine-scheduler -stop-after=greedy,2 -amdgpu-use-amdgpu-trackers=1 -verify-machineinstrs -debug-only=machine-scheduler %s -o - 2>&1 | FileCheck %s
+
+--- |
+  define amdgpu_kernel void @no_sched_metric_due_to_spills() #0 {
+    ret void
+  }
+
+  attributes #0 = { "amdgpu-flat-work-group-size"="1,256" }
----------------
arsenm wrote:

can you shrink the test with amdgpu-waves-per-eu 

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