[C++11] More 'nullptr' conversion. In some cases just using a boolean check instead of comparing to nullptr.

llvm-svn: 206142

1 files changed, 4 insertions, 4 deletions

diff --git a/llvm/lib/CodeGen/MachineSSAUpdater.cpp b/llvm/lib/CodeGen/MachineSSAUpdater.cpp
index 77496ad632d..6e075694cac 100644
--- a/llvm/lib/CodeGen/MachineSSAUpdater.cpp
+++ b/llvm/lib/CodeGen/MachineSSAUpdater.cpp
@@ -36,7 +36,7 @@ static AvailableValsTy &getAvailableVals(void *AV) {
 
 MachineSSAUpdater::MachineSSAUpdater(MachineFunction &MF,
                                      SmallVectorImpl<MachineInstr*> *NewPHI)
-  : AV(0), InsertedPHIs(NewPHI) {
+  : AV(nullptr), InsertedPHIs(NewPHI) {
   TII = MF.getTarget().getInstrInfo();
   MRI = &MF.getRegInfo();
 }
@@ -48,7 +48,7 @@ MachineSSAUpdater::~MachineSSAUpdater() {
 /// Initialize - Reset this object to get ready for a new set of SSA
 /// updates.  ProtoValue is the value used to name PHI nodes.
 void MachineSSAUpdater::Initialize(unsigned V) {
-  if (AV == 0)
+  if (!AV)
     AV = new AvailableValsTy();
   else
     getAvailableVals(AV).clear();
@@ -313,7 +313,7 @@ public:
   static MachineInstr *InstrIsPHI(MachineInstr *I) {
     if (I && I->isPHI())
       return I;
-    return 0;
+    return nullptr;
   }
 
   /// ValueIsPHI - Check if the instruction that defines the specified register
@@ -328,7 +328,7 @@ public:
     MachineInstr *PHI = ValueIsPHI(Val, Updater);
     if (PHI && PHI->getNumOperands() <= 1)
       return PHI;
-    return 0;
+    return nullptr;
   }
 
   /// GetPHIValue - For the specified PHI instruction, return the register