LiveDebugValues: Fix typos and indentation

Author: arsenm

llvm/lib/CodeGen/LiveDebugValues/VarLocBasedImpl.cpp

@@ -22,7 +22,7 @@
 /// and the VarLocBasedLDV class is an implementation that explicitly tracks
 /// locations, using the VarLoc class.
 ///
-/// The cannonical "available expressions" problem doesn't have expression
+/// The canonical "available expressions" problem doesn't have expression
 /// clobbering, instead when a variable is re-assigned, any expressions using
 /// that variable get invalidated. LiveDebugValues can map onto "available
 /// expressions" by having every register represented by a variable, which is
@@ -826,7 +826,7 @@ VarLocBasedLDV::VarLocBasedLDV() { }
 VarLocBasedLDV::~VarLocBasedLDV() { }
 
 /// Erase a variable from the set of open ranges, and additionally erase any
-/// fragments that may overlap it. If the VarLoc is a buckup location, erase
+/// fragments that may overlap it. If the VarLoc is a backup location, erase
 /// the variable from the EntryValuesBackupVars set, indicating we should stop
 /// tracking its backup entry location. Otherwise, if the VarLoc is primary
 /// location, erase the variable from the Vars set.
@@ -1837,8 +1837,8 @@ bool VarLocBasedLDV::ExtendRanges(MachineFunction &MF, TargetPassConfig *TPC) {
   MachineBasicBlock &First_MBB = *(MF.begin());
   for (auto &MI : First_MBB) {
     collectRegDefs(MI, DefinedRegs, TRI);
-      if (MI.isDebugValue())
-        recordEntryValue(MI, DefinedRegs, OpenRanges, VarLocIDs);
+    if (MI.isDebugValue())
+      recordEntryValue(MI, DefinedRegs, OpenRanges, VarLocIDs);
   }
 
   // Initialize per-block structures and scan for fragment overlaps.