[llvm] [AMDGPU] Add MaxMemoryClauseSchedStrategy (PR #114957)

[Matt Arsenault via llvm-commits]

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@@ -1287,9 +1309,18 @@ ScheduleDAGInstrs *GCNPassConfig::createMachineScheduler(
   if (ST.enableSIScheduler())
     return createSIMachineScheduler(C);
 
-  if (EnableMaxIlpSchedStrategy)
+  Attribute SchedStrategyAttr =
+      C->MF->getFunction().getFnAttribute("amdgpu-sched-strategy");
+  StringRef SchedStrategy =
+      SchedStrategyAttr.isValid() ? SchedStrategyAttr.getValueAsString() : "";
+
+  if (EnableMaxIlpSchedStrategy || SchedStrategy == "max-ilp")
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arsenm wrote:

Treat the option as an alternative source to the attribute? 

https://github.com/llvm/llvm-project/pull/114957