Fix a couple of typos. NFC

Author: jroelofs

llvm/include/llvm/CodeGen/TargetInstrInfo.h

@@ -724,7 +724,7 @@ class TargetInstrInfo : public MCInstrInfo {
     return nullptr;
   }
 
-  /// Analyze the loop code, return true if it cannot be understoo. Upon
+  /// Analyze the loop code, return true if it cannot be understood. Upon
   /// success, this function returns false and returns information about the
   /// induction variable and compare instruction used at the end.
   virtual bool analyzeLoop(MachineLoop &L, MachineInstr *&IndVarInst,
@@ -771,7 +771,7 @@ class TargetInstrInfo : public MCInstrInfo {
 
   /// Second variant of isProfitableToIfCvt. This one
   /// checks for the case where two basic blocks from true and false path
-  /// of a if-then-else (diamond) are predicated on mutally exclusive
+  /// of a if-then-else (diamond) are predicated on mutually exclusive
   /// predicates, where the probability of the true path being taken is given
   /// by Probability, and Confidence is a measure of our confidence that it
   /// will be properly predicted.

llvm/lib/CodeGen/MachineInstr.cpp

@@ -1217,7 +1217,7 @@ bool MachineInstr::isSafeToMove(AAResults *AA, bool &SawStore) const {
 
   // See if this instruction does a load.  If so, we have to guarantee that the
   // loaded value doesn't change between the load and the its intended
-  // destination. The check for isInvariantLoad gives the targe the chance to
+  // destination. The check for isInvariantLoad gives the target the chance to
   // classify the load as always returning a constant, e.g. a constant pool
   // load.
   if (mayLoad() && !isDereferenceableInvariantLoad(AA))