Subzero: Convert NULL->nullptr.

src/IceOperand.cpp

 //===- subzero/src/IceOperand.cpp - High-level operand implementation -----===//
 //
 //                        The Subzero Code Generator
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 //
 // This file implements the Operand class and its target-independent
@@ skipping 161 matching lines @@
       if (SingleUseNode != Node)
         MakeMulti = true;
       break;
     case MBS_MultiBlock:
       break;
     }
   }
 
   if (MakeMulti) {
     MultiBlock = MBS_MultiBlock;
-    SingleUseNode = NULL;
+    SingleUseNode = nullptr;
   }
 }
 
 void VariableTracking::markDef(MetadataKind TrackingKind, const Inst *Instr,
                                const CfgNode *Node) {
   // TODO(stichnot): If the definition occurs in the last instruction
   // of the block, consider not marking this as a separate use.  But
   // be careful not to omit all uses of the variable if markDef() and
   // markUse() both use this optimization.
   assert(Node);
   // Verify that instructions are added in increasing order.
 #ifndef NDEBUG
   if (TrackingKind == VMK_All) {
     const Inst *LastInstruction =
         Definitions.empty() ? FirstOrSingleDefinition : Definitions.back();
-    assert(LastInstruction == NULL ||
+    assert(LastInstruction == nullptr ||
            Instr->getNumber() >= LastInstruction->getNumber());
   }
 #endif
   const bool IsFromDef = true;
   const bool IsImplicit = false;
   markUse(TrackingKind, Instr, Node, IsFromDef, IsImplicit);
   if (TrackingKind == VMK_Uses)
     return;
-  if (FirstOrSingleDefinition == NULL)
+  if (FirstOrSingleDefinition == nullptr)
     FirstOrSingleDefinition = Instr;
   else if (TrackingKind == VMK_All)
     Definitions.push_back(Instr);
   switch (MultiDef) {
   case MDS_Unknown:
-    assert(SingleDefNode == NULL);
+    assert(SingleDefNode == nullptr);
     MultiDef = MDS_SingleDef;
     SingleDefNode = Node;
     break;
   case MDS_SingleDef:
     assert(SingleDefNode);
     if (Node == SingleDefNode) {
       MultiDef = MDS_MultiDefSingleBlock;
     } else {
       MultiDef = MDS_MultiDefMultiBlock;
-      SingleDefNode = NULL;
+      SingleDefNode = nullptr;
     }
     break;
   case MDS_MultiDefSingleBlock:
     assert(SingleDefNode);
     if (Node != SingleDefNode) {
       MultiDef = MDS_MultiDefMultiBlock;
-      SingleDefNode = NULL;
+      SingleDefNode = nullptr;
     }
     break;
   case MDS_MultiDefMultiBlock:
-    assert(SingleDefNode == NULL);
+    assert(SingleDefNode == nullptr);
     break;
   }
 }
 
 const Inst *VariableTracking::getFirstDefinition() const {
   switch (MultiDef) {
   case MDS_Unknown:
   case MDS_MultiDefMultiBlock:
-    return NULL;
+    return nullptr;
   case MDS_SingleDef:
   case MDS_MultiDefSingleBlock:
     assert(FirstOrSingleDefinition);
     return FirstOrSingleDefinition;
   }
-  return NULL;
+  return nullptr;
 }
 
 const Inst *VariableTracking::getSingleDefinition() const {
   switch (MultiDef) {
   case MDS_Unknown:
   case MDS_MultiDefMultiBlock:
   case MDS_MultiDefSingleBlock:
-    return NULL;
+    return nullptr;
   case MDS_SingleDef:
     assert(FirstOrSingleDefinition);
     return FirstOrSingleDefinition;
   }
-  return NULL;
+  return nullptr;
 }
 
 void VariablesMetadata::init(MetadataKind TrackingKind) {
   TimerMarker T(TimerStack::TT_vmetadata, Func);
   Kind = TrackingKind;
   Metadata.clear();
   Metadata.resize(Func->getNumVariables());
 
   // Mark implicit args as being used in the entry node.
   for (Variable *Var : Func->getImplicitArgs()) {
-    const Inst *NoInst = NULL;
+    const Inst *NoInst = nullptr;
     const CfgNode *EntryNode = Func->getEntryNode();
     const bool IsFromDef = false;
     const bool IsImplicit = true;
     Metadata[Var->getIndex()]
         .markUse(Kind, NoInst, EntryNode, IsFromDef, IsImplicit);
   }
 
   for (CfgNode *Node : Func->getNodes())
     addNode(Node);
 }
@@ skipping 65 matching lines @@
   if (!isTracked(Var))
     return true; // conservative answer
   SizeT VarNum = Var->getIndex();
   // Conservatively return true if the state is unknown.
   return Metadata[VarNum].getMultiBlock() != VariableTracking::MBS_SingleBlock;
 }
 
 const Inst *VariablesMetadata::getFirstDefinition(const Variable *Var) const {
   assert(Kind != VMK_Uses);
   if (!isTracked(Var))
-    return NULL; // conservative answer
+    return nullptr; // conservative answer
   SizeT VarNum = Var->getIndex();
   return Metadata[VarNum].getFirstDefinition();
 }
 
 const Inst *VariablesMetadata::getSingleDefinition(const Variable *Var) const {
   assert(Kind != VMK_Uses);
   if (!isTracked(Var))
-    return NULL; // conservative answer
+    return nullptr; // conservative answer
   SizeT VarNum = Var->getIndex();
   return Metadata[VarNum].getSingleDefinition();
 }
 
 const InstDefList &
 VariablesMetadata::getLatterDefinitions(const Variable *Var) const {
   assert(Kind == VMK_All);
   if (!isTracked(Var))
     return NoDefinitions;
   SizeT VarNum = Var->getIndex();
   return Metadata[VarNum].getLatterDefinitions();
 }
 
 const CfgNode *VariablesMetadata::getLocalUseNode(const Variable *Var) const {
   if (!isTracked(Var))
-    return NULL; // conservative answer
+    return nullptr; // conservative answer
   SizeT VarNum = Var->getIndex();
   return Metadata[VarNum].getNode();
 }
 
 const InstDefList VariablesMetadata::NoDefinitions;
 
 // ======================== dump routines ======================== //
 
 void Variable::emit(const Cfg *Func) const {
   if (ALLOW_DUMP)
     Func->getTarget()->emitVariable(this);
 }
 
 void Variable::dump(const Cfg *Func, Ostream &Str) const {
   if (!ALLOW_DUMP)
     return;
-  if (Func == NULL) {
+  if (Func == nullptr) {
     Str << "%" << getName(Func);
     return;
   }
   if (Func->getContext()->isVerbose(IceV_RegOrigins) ||
       (!hasReg() && !Func->getTarget()->hasComputedFrame()))
     Str << "%" << getName(Func);
   if (hasReg()) {
     if (Func->getContext()->isVerbose(IceV_RegOrigins))
       Str << ":";
     Str << Func->getTarget()->getRegName(RegNum, getType());
@@ skipping 72 matching lines @@
   if (!ALLOW_DUMP)
     return Str;
   if (W.getWeight() == RegWeight::Inf)
     Str << "Inf";
   else
     Str << W.getWeight();
   return Str;
 }
 
 } // end of namespace Ice