[llvm] [ScheduleDAG] Allow disabling the SchedModel / Itineraries during Scheduling (PR #138057)

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``````````bash
git-clang-format --diff HEAD~1 HEAD --extensions h,cpp -- llvm/include/llvm/CodeGen/TargetSchedule.h llvm/lib/CodeGen/ScheduleDAGInstrs.cpp llvm/lib/CodeGen/TargetSchedule.cpp
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View the diff from clang-format here.
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``````````diff
diff --git a/llvm/include/llvm/CodeGen/TargetSchedule.h b/llvm/include/llvm/CodeGen/TargetSchedule.h
index da7b9fa29..85a177621 100644
--- a/llvm/include/llvm/CodeGen/TargetSchedule.h
+++ b/llvm/include/llvm/CodeGen/TargetSchedule.h
@@ -56,8 +56,8 @@ public:
   /// The machine model API keeps a copy of the top-level MCSchedModel table
   /// indices and may query TargetSubtargetInfo and TargetInstrInfo to resolve
   /// dynamic properties.
-  void init(const TargetSubtargetInfo *TSInfo,
-            bool EnableSModel = true, bool EnableSItins = true);
+  void init(const TargetSubtargetInfo *TSInfo, bool EnableSModel = true,
+            bool EnableSItins = true);
 
   /// Return the MCSchedClassDesc for this instruction.
   const MCSchedClassDesc *resolveSchedClass(const MachineInstr *MI) const;
diff --git a/llvm/lib/CodeGen/ScheduleDAGInstrs.cpp b/llvm/lib/CodeGen/ScheduleDAGInstrs.cpp
index 710d7ec75..eae2e8c11 100644
--- a/llvm/lib/CodeGen/ScheduleDAGInstrs.cpp
+++ b/llvm/lib/CodeGen/ScheduleDAGInstrs.cpp
@@ -69,11 +69,13 @@ static cl::opt<bool>
 static cl::opt<bool> UseTBAA("use-tbaa-in-sched-mi", cl::Hidden,
     cl::init(true), cl::desc("Enable use of TBAA during MI DAG construction"));
 
-static cl::opt<bool> EnableSchedModel("schedmodel", cl::Hidden, cl::init(true),
-  cl::desc("Use TargetSchedModel for latency lookup"));
+static cl::opt<bool>
+    EnableSchedModel("schedmodel", cl::Hidden, cl::init(true),
+                     cl::desc("Use TargetSchedModel for latency lookup"));
 
-static cl::opt<bool> EnableSchedItins("scheditins", cl::Hidden, cl::init(true),
-  cl::desc("Use InstrItineraryData for latency lookup"));
+static cl::opt<bool>
+    EnableSchedItins("scheditins", cl::Hidden, cl::init(true),
+                     cl::desc("Use InstrItineraryData for latency lookup"));
 
 // Note: the two options below might be used in tuning compile time vs
 // output quality. Setting HugeRegion so large that it will never be
diff --git a/llvm/lib/CodeGen/TargetSchedule.cpp b/llvm/lib/CodeGen/TargetSchedule.cpp
index 1dd293ced..7ae9e0e37 100644
--- a/llvm/lib/CodeGen/TargetSchedule.cpp
+++ b/llvm/lib/CodeGen/TargetSchedule.cpp
@@ -41,7 +41,8 @@ bool TargetSchedModel::hasInstrItineraries() const {
   return EnableSchedItins && !InstrItins.isEmpty();
 }
 
-void TargetSchedModel::init(const TargetSubtargetInfo *TSInfo, bool EnableSModel, bool EnableSItins) {
+void TargetSchedModel::init(const TargetSubtargetInfo *TSInfo,
+                            bool EnableSModel, bool EnableSItins) {
   STI = TSInfo;
   SchedModel = TSInfo->getSchedModel();
   TII = TSInfo->getInstrInfo();

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https://github.com/llvm/llvm-project/pull/138057