[llvm] Add option -enable-machine-licm (PR #67589)

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<!--LLVM CODE FORMAT COMMENT: {clang-format}-->

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``````````bash
git-clang-format --diff 5ffbdd9ed5fb719b354e4a46acc8737c5b624f94 76f92c66e8a32e476ca134066a24b5e1a741f7ea -- llvm/lib/CodeGen/MachineLICM.cpp
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View the diff from clang-format here.
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``````````diff
diff --git a/llvm/lib/CodeGen/MachineLICM.cpp b/llvm/lib/CodeGen/MachineLICM.cpp
index a66e80e11..9097bcf9d 100644
--- a/llvm/lib/CodeGen/MachineLICM.cpp
+++ b/llvm/lib/CodeGen/MachineLICM.cpp
@@ -58,10 +58,9 @@ using namespace llvm;
 
 #define DEBUG_TYPE "machinelicm"
 
-static cl::opt<bool>
-EnableMachineLICM("enable-machine-licm",
-                 cl::desc("Enable MachineLICM"),
-                 cl::init(true), cl::Hidden);
+static cl::opt<bool> EnableMachineLICM("enable-machine-licm",
+                                       cl::desc("Enable MachineLICM"),
+                                       cl::init(true), cl::Hidden);
 
 static cl::opt<bool>
 AvoidSpeculation("avoid-speculation",
@@ -335,35 +334,35 @@ INITIALIZE_PASS_END(EarlyMachineLICM, "early-machinelicm",
                     "Early Machine Loop Invariant Code Motion", false, false)
 
 bool MachineLICMBase::runOnMachineFunction(MachineFunction &MF) {
-  if (!EnableMachineLICM || skipFunction(MF.getFunction()))
-    return false;
+    if (!EnableMachineLICM || skipFunction(MF.getFunction()))
+      return false;
 
-  Changed = FirstInLoop = false;
-  const TargetSubtargetInfo &ST = MF.getSubtarget();
-  TII = ST.getInstrInfo();
-  TLI = ST.getTargetLowering();
-  TRI = ST.getRegisterInfo();
-  MFI = &MF.getFrameInfo();
-  MRI = &MF.getRegInfo();
-  SchedModel.init(&ST);
-
-  PreRegAlloc = MRI->isSSA();
-  HasProfileData = MF.getFunction().hasProfileData();
-
-  if (PreRegAlloc)
-    LLVM_DEBUG(dbgs() << "******** Pre-regalloc Machine LICM: ");
-  else
-    LLVM_DEBUG(dbgs() << "******** Post-regalloc Machine LICM: ");
-  LLVM_DEBUG(dbgs() << MF.getName() << " ********\n");
-
-  if (PreRegAlloc) {
-    // Estimate register pressure during pre-regalloc pass.
-    unsigned NumRPS = TRI->getNumRegPressureSets();
-    RegPressure.resize(NumRPS);
-    std::fill(RegPressure.begin(), RegPressure.end(), 0);
-    RegLimit.resize(NumRPS);
-    for (unsigned i = 0, e = NumRPS; i != e; ++i)
-      RegLimit[i] = TRI->getRegPressureSetLimit(MF, i);
+    Changed = FirstInLoop = false;
+    const TargetSubtargetInfo &ST = MF.getSubtarget();
+    TII = ST.getInstrInfo();
+    TLI = ST.getTargetLowering();
+    TRI = ST.getRegisterInfo();
+    MFI = &MF.getFrameInfo();
+    MRI = &MF.getRegInfo();
+    SchedModel.init(&ST);
+
+    PreRegAlloc = MRI->isSSA();
+    HasProfileData = MF.getFunction().hasProfileData();
+
+    if (PreRegAlloc)
+      LLVM_DEBUG(dbgs() << "******** Pre-regalloc Machine LICM: ");
+    else
+      LLVM_DEBUG(dbgs() << "******** Post-regalloc Machine LICM: ");
+    LLVM_DEBUG(dbgs() << MF.getName() << " ********\n");
+
+    if (PreRegAlloc) {
+      // Estimate register pressure during pre-regalloc pass.
+      unsigned NumRPS = TRI->getNumRegPressureSets();
+      RegPressure.resize(NumRPS);
+      std::fill(RegPressure.begin(), RegPressure.end(), 0);
+      RegLimit.resize(NumRPS);
+      for (unsigned i = 0, e = NumRPS; i != e; ++i)
+        RegLimit[i] = TRI->getRegPressureSetLimit(MF, i);
   }
 
   // Get our Loop information...

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https://github.com/llvm/llvm-project/pull/67589