[turbofan] Build s/NULL/nullptr/g and CHECK(x != nullptr) to CHECK_NOT_NULL(x).

src/compiler/representation-change.cc

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/compiler/representation-change.h"
 
 #include <sstream>
 
 #include "src/base/bits.h"
 #include "src/code-factory.h"
@@ skipping 410 matching lines @@
     case IrOpcode::kNumberBitwiseAnd:
       return machine()->Word32And();
     case IrOpcode::kNumberEqual:
       return machine()->Word32Equal();
     case IrOpcode::kNumberLessThan:
       return machine()->Int32LessThan();
     case IrOpcode::kNumberLessThanOrEqual:
       return machine()->Int32LessThanOrEqual();
     default:
       UNREACHABLE();
-      return NULL;
+      return nullptr;
   }
 }
 
 
 const Operator* RepresentationChanger::Uint32OperatorFor(
     IrOpcode::Value opcode) {
   switch (opcode) {
     case IrOpcode::kNumberAdd:
       return machine()->Int32Add();
     case IrOpcode::kNumberSubtract:
       return machine()->Int32Sub();
     case IrOpcode::kNumberMultiply:
       return machine()->Int32Mul();
     case IrOpcode::kNumberDivide:
       return machine()->Uint32Div();
     case IrOpcode::kNumberModulus:
       return machine()->Uint32Mod();
     case IrOpcode::kNumberEqual:
       return machine()->Word32Equal();
     case IrOpcode::kNumberLessThan:
       return machine()->Uint32LessThan();
     case IrOpcode::kNumberLessThanOrEqual:
       return machine()->Uint32LessThanOrEqual();
     default:
       UNREACHABLE();
-      return NULL;
+      return nullptr;
   }
 }
 
 
 const Operator* RepresentationChanger::Float64OperatorFor(
     IrOpcode::Value opcode) {
   switch (opcode) {
     case IrOpcode::kNumberAdd:
       return machine()->Float64Add();
     case IrOpcode::kNumberSubtract:
       return machine()->Float64Sub();
     case IrOpcode::kNumberMultiply:
       return machine()->Float64Mul();
     case IrOpcode::kNumberDivide:
       return machine()->Float64Div();
     case IrOpcode::kNumberModulus:
       return machine()->Float64Mod();
     case IrOpcode::kNumberEqual:
       return machine()->Float64Equal();
     case IrOpcode::kNumberLessThan:
       return machine()->Float64LessThan();
     case IrOpcode::kNumberLessThanOrEqual:
       return machine()->Float64LessThanOrEqual();
     default:
       UNREACHABLE();
-      return NULL;
+      return nullptr;
   }
 }
 
 
 MachineSemantic RepresentationChanger::TypeFromUpperBound(Type* type) {
   CHECK(!type->Is(Type::None()));
   if (type->Is(Type::Signed32())) return MachineSemantic::kInt32;
   if (type->Is(Type::Unsigned32())) return MachineSemantic::kUint32;
   if (type->Is(Type::Number())) return MachineSemantic::kNumber;
   if (type->Is(Type::Boolean())) return MachineSemantic::kBool;
@@ skipping 27 matching lines @@
 
 
 Node* RepresentationChanger::InsertChangeTaggedToFloat64(Node* node) {
   return jsgraph()->graph()->NewNode(simplified()->ChangeTaggedToFloat64(),
                                      node);
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8