[llvm] [AMDGPU] Enable reordering of VMEM loads during clustering (PR #107986)

[Matt Arsenault via llvm-commits]

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@@ -703,12 +708,21 @@ static ScheduleDAGInstrs *createSIMachineScheduler(MachineSchedContext *C) {
   return new SIScheduleDAGMI(C);
 }
 
+static bool getReorderWhileClustering(const MachineFunction *MF) {
+  if (!ReorderWhileClustering)
+    return false;
+  Attribute FnAttr =
+      MF->getFunction().getFnAttribute("amdgpu-reorder-while-clustering");
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arsenm wrote:

I wouldn't add the attribute without a specific need 

https://github.com/llvm/llvm-project/pull/107986