[llvm] [llvm][ScheduleDAG] Re-arrange SUnit's members to make it smaller (PR #94547)

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``````````bash
git-clang-format --diff a9342f2eab7993a3be1d1156070c0d2de21ed973 25196f6b9afbcd6ee8a56cee29f6d8271faaf3b7 -- llvm/include/llvm/CodeGen/ScheduleDAG.h llvm/include/llvm/CodeGen/TargetLowering.h
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View the diff from clang-format here.
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``````````diff
diff --git a/llvm/include/llvm/CodeGen/TargetLowering.h b/llvm/include/llvm/CodeGen/TargetLowering.h
index fc8de4a649..974a5301f6 100644
--- a/llvm/include/llvm/CodeGen/TargetLowering.h
+++ b/llvm/include/llvm/CodeGen/TargetLowering.h
@@ -97,15 +97,15 @@ class Value;
 namespace Sched {
 
 enum Preference : uint8_t {
-  None,        // No preference
-  Source,      // Follow source order.
-  RegPressure, // Scheduling for lowest register pressure.
-  Hybrid,      // Scheduling for both latency and register pressure.
-  ILP,         // Scheduling for ILP in low register pressure mode.
-  VLIW,        // Scheduling for VLIW targets.
-  Fast,        // Fast suboptimal list scheduling
-  Linearize,   // Linearize DAG, no scheduling
-  Last = Linearize  // Marker for the last Sched::Preference
+  None,            // No preference
+  Source,          // Follow source order.
+  RegPressure,     // Scheduling for lowest register pressure.
+  Hybrid,          // Scheduling for both latency and register pressure.
+  ILP,             // Scheduling for ILP in low register pressure mode.
+  VLIW,            // Scheduling for VLIW targets.
+  Fast,            // Fast suboptimal list scheduling
+  Linearize,       // Linearize DAG, no scheduling
+  Last = Linearize // Marker for the last Sched::Preference
 };
 
 } // end namespace Sched

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https://github.com/llvm/llvm-project/pull/94547