[NFC] fix trivial typos in comments

llvm-svn: 350690

Author: inouehrs

llvm/lib/CodeGen/IfConversion.cpp

@@ -1444,7 +1444,7 @@ bool IfConverter::IfConvertSimple(BBInfo &BBI, IfcvtKind Kind) {
   Redefs.init(*TRI);
 
   if (MRI->tracksLiveness()) {
-    // Initialize liveins to the first BB. These are potentiall redefined by
+    // Initialize liveins to the first BB. These are potentially redefined by
     // predicated instructions.
     Redefs.addLiveIns(CvtMBB);
     Redefs.addLiveIns(NextMBB);
@@ -2148,7 +2148,7 @@ void IfConverter::MergeBlocks(BBInfo &ToBBI, BBInfo &FromBBI, bool AddEdges) {
       // Calculate the edge probability for the edge from ToBBI.BB to Succ,
       // which is a portion of the edge probability from FromMBB to Succ. The
       // portion ratio is the edge probability from ToBBI.BB to FromMBB (if
-      // FromBBI is a successor of ToBBI.BB. See comment below for excepion).
+      // FromBBI is a successor of ToBBI.BB. See comment below for exception).
       NewProb = MBPI->getEdgeProbability(&FromMBB, Succ);
 
       // To2FromProb is 0 when FromMBB is not a successor of ToBBI.BB. This

llvm/lib/CodeGen/MachineBlockPlacement.cpp

@@ -316,7 +316,7 @@ class MachineBlockPlacement : public MachineFunctionPass {
   /// A type for a block filter set.
   using BlockFilterSet = SmallSetVector<const MachineBasicBlock *, 16>;
 
-  /// Pair struct containing basic block and taildup profitiability
+  /// Pair struct containing basic block and taildup profitability
   struct BlockAndTailDupResult {
     MachineBasicBlock *BB;
     bool ShouldTailDup;

llvm/lib/CodeGen/MachinePipeliner.cpp

@@ -1557,7 +1557,7 @@ void SwingSchedulerDAG::Circuits::createAdjacencyStructure(
       }
     }
   }
-  // Add back-eges in the adjacency matrix for the output dependences.
+  // Add back-edges in the adjacency matrix for the output dependences.
   for (auto &OD : OutputDeps)
     if (!Added.test(OD.second)) {
       AdjK[OD.first].push_back(OD.second);
@@ -2773,7 +2773,7 @@ void SwingSchedulerDAG::generateExistingPhis(
       else if (PrologStage >= AccessStage + StageDiff + np &&
                VRMap[PrologStage - StageDiff - np].count(LoopVal) != 0)
         PhiOp1 = VRMap[PrologStage - StageDiff - np][LoopVal];
-      // Check if the Phi has already been scheduled, but the loop intruction
+      // Check if the Phi has already been scheduled, but the loop instruction
       // is either another Phi, or doesn't occur in the loop.
       else if (PrologStage >= AccessStage + StageDiff + np) {
         // If the Phi references another Phi, we need to examine the other

llvm/lib/CodeGen/MachineScheduler.cpp

@@ -2460,13 +2460,13 @@ static unsigned computeRemLatency(SchedBoundary &CurrZone) {
 }
 
 /// Returns true if the current cycle plus remaning latency is greater than
-/// the cirtical path in the scheduling region.
+/// the critical path in the scheduling region.
 bool GenericSchedulerBase::shouldReduceLatency(const CandPolicy &Policy,
                                                SchedBoundary &CurrZone,
                                                bool ComputeRemLatency,
                                                unsigned &RemLatency) const {
   // The current cycle is already greater than the critical path, so we are
-  // already latnecy limited and don't need to compute the remaining latency.
+  // already latency limited and don't need to compute the remaining latency.
   if (CurrZone.getCurrCycle() > Rem.CriticalPath)
     return true;
 

llvm/lib/CodeGen/MachineVerifier.cpp

@@ -683,7 +683,7 @@ MachineVerifier::visitMachineBasicBlockBefore(const MachineBasicBlock *MBB) {
         // out the bottom of the function.
       } else if (MBB->succ_size() == LandingPadSuccs.size()) {
         // It's possible that the block legitimately ends with a noreturn
-        // call or an unreachable, in which case it won't actuall fall
+        // call or an unreachable, in which case it won't actually fall
         // out of the block.
       } else if (MBB->succ_size() != 1+LandingPadSuccs.size()) {
         report("MBB exits via unconditional fall-through but doesn't have "

llvm/lib/CodeGen/RegAllocGreedy.cpp

@@ -318,7 +318,7 @@ class RAGreedy : public MachineFunctionPass,
 
     /// Track new eviction.
     /// The Evictor vreg has evicted the Evictee vreg from Physreg.
-    /// \param PhysReg The phisical register Evictee was evicted from.
+    /// \param PhysReg The physical register Evictee was evicted from.
     /// \param Evictor The evictor Vreg that evicted Evictee.
     /// \param Evictee The evictee Vreg.
     void addEviction(unsigned PhysReg, unsigned Evictor, unsigned Evictee) {

llvm/lib/CodeGen/RegisterCoalescer.cpp

@@ -176,7 +176,7 @@ namespace {
     /// If one def has many copy like uses, and those copy uses are all
     /// rematerialized, the live interval update needed for those
     /// rematerializations will be delayed and done all at once instead
-    /// of being done multiple times. This is to save compile cost becuase
+    /// of being done multiple times. This is to save compile cost because
     /// live interval update is costly.
     void lateLiveIntervalUpdate();