Subzero: Convert NULL->nullptr.

src/IceCfg.cpp

 //===- subzero/src/IceCfg.cpp - Control flow graph 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 Cfg class, including constant pool
 // management.
 //
 //===----------------------------------------------------------------------===//
 
 #include "IceCfg.h"
 #include "IceCfgNode.h"
 #include "IceClFlags.h"
 #include "IceDefs.h"
 #include "IceInst.h"
 #include "IceLiveness.h"
 #include "IceOperand.h"
 #include "IceTargetLowering.h"
 
 namespace Ice {
 
-thread_local const Cfg *Cfg::CurrentCfg = NULL;
+thread_local const Cfg *Cfg::CurrentCfg = nullptr;
 
 ArenaAllocator *getCurrentCfgAllocator() {
   return Cfg::getCurrentCfgAllocator();
 }
 
 Cfg::Cfg(GlobalContext *Ctx)
     : Ctx(Ctx), FunctionName(""), ReturnType(IceType_void),
       IsInternalLinkage(false), HasError(false), FocusedTiming(false),
-      ErrorMessage(""), Entry(NULL), NextInstNumber(Inst::NumberInitial),
+      ErrorMessage(""), Entry(nullptr), NextInstNumber(Inst::NumberInitial),
       Allocator(new ArenaAllocator()), Live(nullptr),
       Target(TargetLowering::createLowering(Ctx->getTargetArch(), this)),
       VMetadata(new VariablesMetadata(this)),
       TargetAssembler(
           TargetLowering::createAssembler(Ctx->getTargetArch(), this)),
-      CurrentNode(NULL) {
+      CurrentNode(nullptr) {
   assert(!Ctx->isIRGenerationDisabled() &&
          "Attempt to build cfg when IR generation disabled");
 }
 
 Cfg::~Cfg() {
-  // TODO(stichnot,kschimpf): Set CurrentCfg=NULL in the dtor for
+  // TODO(stichnot,kschimpf): Set CurrentCfg=nullptr in the dtor for
   // safety.  This can't be done currently because the translator
   // manages the Cfg by creating a new Cfg (which sets CurrentCfg to
   // the new value), then deleting the old Cfg (which would then reset
-  // CurrentCfg to NULL).
+  // CurrentCfg to nullptr).
 }
 
 void Cfg::setError(const IceString &Message) {
   HasError = true;
   ErrorMessage = Message;
   Ctx->getStrDump() << "ICE translation error: " << ErrorMessage << "\n";
 }
 
 CfgNode *Cfg::makeNode() {
   SizeT LabelIndex = Nodes.size();
@@ skipping 269 matching lines @@
   }
 }
 
 // Traverse every Variable of every Inst and verify that it
 // appears within the Variable's computed live range.
 bool Cfg::validateLiveness() const {
   TimerMarker T(TimerStack::TT_validateLiveness, this);
   bool Valid = true;
   Ostream &Str = Ctx->getStrDump();
   for (CfgNode *Node : Nodes) {
-    Inst *FirstInst = NULL;
+    Inst *FirstInst = nullptr;
     for (auto Inst = Node->getInsts().begin(), E = Node->getInsts().end();
          Inst != E; ++Inst) {
       if (Inst->isDeleted())
         continue;
-      if (FirstInst == NULL)
+      if (FirstInst == nullptr)
         FirstInst = Inst;
       InstNumberT InstNumber = Inst->getNumber();
       if (Variable *Dest = Inst->getDest()) {
         if (!Dest->getIgnoreLiveness()) {
           bool Invalid = false;
           const bool IsDest = true;
           if (!Dest->getLiveRange().containsValue(InstNumber, IsDest))
             Invalid = true;
           // Check that this instruction actually *begins* Dest's live
           // range, by checking that Dest is not live in the previous
@@ skipping 46 matching lines @@
   for (CfgNode *Node : Nodes) {
     Node->contractIfEmpty();
   }
 }
 
 void Cfg::doBranchOpt() {
   TimerMarker T(TimerStack::TT_doBranchOpt, this);
   for (auto I = Nodes.begin(), E = Nodes.end(); I != E; ++I) {
     auto NextNode = I;
     ++NextNode;
-    (*I)->doBranchOpt(NextNode == E ? NULL : *NextNode);
+    (*I)->doBranchOpt(NextNode == E ? nullptr : *NextNode);
   }
 }
 
 // ======================== Dump routines ======================== //
 
 void Cfg::emitTextHeader(const IceString &MangledName) {
   // Note: Still used by emit IAS.
   Ostream &Str = Ctx->getStrEmit();
   Str << "\t.text\n";
   if (Ctx->getFlags().FunctionSections)
@@ skipping 97 matching lines @@
     }
   }
   // Print each basic block
   for (CfgNode *Node : Nodes)
     Node->dump(this);
   if (getContext()->isVerbose(IceV_Instructions))
     Str << "}\n";
 }
 
 } // end of namespace Ice