[C++] Use 'nullptr'. Target edition.

llvm-svn: 207197
diff --git a/llvm/lib/Target/X86/X86SelectionDAGInfo.cpp b/llvm/lib/Target/X86/X86SelectionDAGInfo.cpp
index 4c4f9bb..b422480 100644
--- a/llvm/lib/Target/X86/X86SelectionDAGInfo.cpp
+++ b/llvm/lib/Target/X86/X86SelectionDAGInfo.cpp
@@ -51,7 +51,7 @@
     ConstantSDNode *V = dyn_cast<ConstantSDNode>(Src);
 
     if (const char *bzeroEntry =  V &&
-        V->isNullValue() ? Subtarget->getBZeroEntry() : 0) {
+        V->isNullValue() ? Subtarget->getBZeroEntry() : nullptr) {
       EVT IntPtr = TLI.getPointerTy();
       Type *IntPtrTy = getDataLayout()->getIntPtrType(*DAG.getContext());
       TargetLowering::ArgListTy Args;
@@ -78,7 +78,7 @@
   }
 
   uint64_t SizeVal = ConstantSize->getZExtValue();
-  SDValue InFlag(0, 0);
+  SDValue InFlag;
   EVT AVT;
   SDValue Count;
   ConstantSDNode *ValC = dyn_cast<ConstantSDNode>(Src);
@@ -226,7 +226,7 @@
   SDValue Count = DAG.getIntPtrConstant(CountVal);
   unsigned BytesLeft = SizeVal % UBytes;
 
-  SDValue InFlag(0, 0);
+  SDValue InFlag;
   Chain  = DAG.getCopyToReg(Chain, dl, Subtarget->is64Bit() ? X86::RCX :
                                                               X86::ECX,
                             Count, InFlag);