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

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@206142 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 4 insertions, 4 deletions

diff --git a/lib/CodeGen/LiveRangeEdit.cpp b/lib/CodeGen/LiveRangeEdit.cpp
index 891eaab1a59..e506b680b51 100644
--- a/lib/CodeGen/LiveRangeEdit.cpp
+++ b/lib/CodeGen/LiveRangeEdit.cpp
@@ -164,7 +164,7 @@ void LiveRangeEdit::eraseVirtReg(unsigned Reg) {
 
 bool LiveRangeEdit::foldAsLoad(LiveInterval *LI,
                                SmallVectorImpl<MachineInstr*> &Dead) {
-  MachineInstr *DefMI = 0, *UseMI = 0;
+  MachineInstr *DefMI = nullptr, *UseMI = nullptr;
 
   // Check that there is a single def and a single use.
   for (MachineOperand &MO : MRI.reg_nodbg_operands(LI->reg)) {
@@ -197,7 +197,7 @@ bool LiveRangeEdit::foldAsLoad(LiveInterval *LI,
   // We also need to make sure it is safe to move the load.
   // Assume there are stores between DefMI and UseMI.
   bool SawStore = true;
-  if (!DefMI->isSafeToMove(&TII, 0, SawStore))
+  if (!DefMI->isSafeToMove(&TII, nullptr, SawStore))
     return false;
 
   DEBUG(dbgs() << "Try to fold single def: " << *DefMI
@@ -213,7 +213,7 @@ bool LiveRangeEdit::foldAsLoad(LiveInterval *LI,
   DEBUG(dbgs() << "                folded: " << *FoldMI);
   LIS.ReplaceMachineInstrInMaps(UseMI, FoldMI);
   UseMI->eraseFromParent();
-  DefMI->addRegisterDead(LI->reg, 0);
+  DefMI->addRegisterDead(LI->reg, nullptr);
   Dead.push_back(DefMI);
   ++NumDCEFoldedLoads;
   return true;
@@ -236,7 +236,7 @@ void LiveRangeEdit::eliminateDeadDef(MachineInstr *MI, ToShrinkSet &ToShrink) {
 
   // Use the same criteria as DeadMachineInstructionElim.
   bool SawStore = false;
-  if (!MI->isSafeToMove(&TII, 0, SawStore)) {
+  if (!MI->isSafeToMove(&TII, nullptr, SawStore)) {
     DEBUG(dbgs() << "Can't delete: " << Idx << '\t' << *MI);
     return;
   }