[llvm] [MISched] Add templates for creating custom schedulers (PR #141935)

[Min-Yih Hsu via llvm-commits]

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@@ -1375,6 +1367,41 @@ std::unique_ptr<ScheduleDAGMutation>
 createCopyConstrainDAGMutation(const TargetInstrInfo *TII,
                                const TargetRegisterInfo *TRI);
 
+/// Create the standard converging machine scheduler. This will be used as the
+/// default scheduler if the target does not set a default.
+/// Adds default DAG mutations.
+template <typename Strategy = GenericScheduler>
+ScheduleDAGMILive *createGenericSchedLive(MachineSchedContext *C) {
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mshockwave wrote:

by this point, should we just call this function `createScheduleMILive` or something along this line?

https://github.com/llvm/llvm-project/pull/141935