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

src/compiler/ppc/code-generator-ppc.cc

 // Copyright 2014 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/code-generator.h"
 
 #include "src/ast/scopes.h"
 #include "src/compiler/code-generator-impl.h"
 #include "src/compiler/gap-resolver.h"
 #include "src/compiler/node-matchers.h"
@@ skipping 83 matching lines @@
     }
     UNREACHABLE();
     return MemOperand(r0);
   }
 
   MemOperand MemoryOperand(AddressingMode* mode, size_t first_index = 0) {
     return MemoryOperand(mode, &first_index);
   }
 
   MemOperand ToMemOperand(InstructionOperand* op) const {
-    DCHECK(op != NULL);
+    DCHECK_NOT_NULL(op);
     DCHECK(op->IsStackSlot() || op->IsDoubleStackSlot());
     FrameOffset offset = frame_access_state()->GetFrameOffset(
         AllocatedOperand::cast(op)->index());
     return MemOperand(offset.from_stack_pointer() ? sp : fp, offset.offset());
   }
 };
 
 
 static inline bool HasRegisterInput(Instruction* instr, size_t index) {
   return instr->InputAt(index)->IsRegister();
@@ skipping 1518 matching lines @@
     }
   } else {
     __ Drop(pop_count);
   }
   __ Ret();
 }
 
 
 void CodeGenerator::AssembleMove(InstructionOperand* source,
                                  InstructionOperand* destination) {
-  PPCOperandConverter g(this, NULL);
+  PPCOperandConverter g(this, nullptr);
   // Dispatch on the source and destination operand kinds.  Not all
   // combinations are possible.
   if (source->IsRegister()) {
     DCHECK(destination->IsRegister() || destination->IsStackSlot());
     Register src = g.ToRegister(source);
     if (destination->IsRegister()) {
       __ Move(g.ToRegister(destination), src);
     } else {
       __ StoreP(src, g.ToMemOperand(destination), r0);
     }
@@ skipping 81 matching lines @@
       __ StoreDouble(temp, g.ToMemOperand(destination), r0);
     }
   } else {
     UNREACHABLE();
   }
 }
 
 
 void CodeGenerator::AssembleSwap(InstructionOperand* source,
                                  InstructionOperand* destination) {
-  PPCOperandConverter g(this, NULL);
+  PPCOperandConverter g(this, nullptr);
   // Dispatch on the source and destination operand kinds.  Not all
   // combinations are possible.
   if (source->IsRegister()) {
     // Register-register.
     Register temp = kScratchReg;
     Register src = g.ToRegister(source);
     if (destination->IsRegister()) {
       Register dst = g.ToRegister(destination);
       __ mr(temp, src);
       __ mr(src, dst);
@@ skipping 85 matching lines @@
       padding_size -= v8::internal::Assembler::kInstrSize;
     }
   }
 }
 
 #undef __
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8