[llvm] [AMDGPU] Examine instructions in pending queues during scheduling (PR #147653)

[Matt Arsenault via llvm-commits]

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@@ -319,17 +327,45 @@ void GCNSchedStrategy::initCandidate(SchedCandidate &Cand, SUnit *SU,
   }
 }
 
+static bool shouldCheckPending(SchedBoundary &Zone,
+                               const TargetSchedModel *SchedModel) {
+  const unsigned ReadyListLimit = 256;
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arsenm wrote:

Can you replace the bool flag with a value for this limit? Disable will be implied by 0 

https://github.com/llvm/llvm-project/pull/147653