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

src/compiler/control-builders.h

 // Copyright 2013 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.
 
 #ifndef V8_COMPILER_CONTROL_BUILDERS_H_
 #define V8_COMPILER_CONTROL_BUILDERS_H_
 
 #include "src/compiler/ast-graph-builder.h"
 #include "src/compiler/node.h"
 
@@ skipping 23 matching lines @@
 
   Builder* builder_;
 };
 
 
 // Tracks control flow for a conditional statement.
 class IfBuilder final : public ControlBuilder {
  public:
   explicit IfBuilder(AstGraphBuilder* builder)
       : ControlBuilder(builder),
-        then_environment_(NULL),
-        else_environment_(NULL) {}
+        then_environment_(nullptr),
+        else_environment_(nullptr) {}
 
   // Primitive control commands.
   void If(Node* condition, BranchHint hint = BranchHint::kNone);
   void Then();
   void Else();
   void End();
 
  private:
   Environment* then_environment_;  // Environment after the 'then' body.
   Environment* else_environment_;  // Environment for the 'else' body.
 };
 
 
 // Tracks control flow for an iteration statement.
 class LoopBuilder final : public ControlBuilder {
  public:
   explicit LoopBuilder(AstGraphBuilder* builder)
       : ControlBuilder(builder),
-        loop_environment_(NULL),
-        continue_environment_(NULL),
-        break_environment_(NULL) {}
+        loop_environment_(nullptr),
+        continue_environment_(nullptr),
+        break_environment_(nullptr) {}
 
   // Primitive control commands.
   void BeginLoop(BitVector* assigned, bool is_osr = false);
   void Continue();
   void EndBody();
   void EndLoop();
 
   // Primitive support for break.
   void Break() final;
 
   // Compound control commands for conditional break.
   void BreakUnless(Node* condition);
   void BreakWhen(Node* condition);
 
  private:
   Environment* loop_environment_;      // Environment of the loop header.
   Environment* continue_environment_;  // Environment after the loop body.
   Environment* break_environment_;     // Environment after the loop exits.
 };
 
 
 // Tracks control flow for a switch statement.
 class SwitchBuilder final : public ControlBuilder {
  public:
   explicit SwitchBuilder(AstGraphBuilder* builder, int case_count)
       : ControlBuilder(builder),
-        body_environment_(NULL),
-        label_environment_(NULL),
-        break_environment_(NULL),
+        body_environment_(nullptr),
+        label_environment_(nullptr),
+        break_environment_(nullptr),
         body_environments_(case_count, zone()) {}
 
   // Primitive control commands.
   void BeginSwitch();
   void BeginLabel(int index, Node* condition);
   void EndLabel();
   void DefaultAt(int index);
   void BeginCase(int index);
   void EndCase();
   void EndSwitch();
 
   // Primitive support for break.
   void Break() final;
 
   // The number of cases within a switch is statically known.
   size_t case_count() const { return body_environments_.size(); }
 
  private:
   Environment* body_environment_;   // Environment after last case body.
   Environment* label_environment_;  // Environment for next label condition.
   Environment* break_environment_;  // Environment after the switch exits.
   ZoneVector<Environment*> body_environments_;
 };
 
 
 // Tracks control flow for a block statement.
 class BlockBuilder final : public ControlBuilder {
  public:
   explicit BlockBuilder(AstGraphBuilder* builder)
-      : ControlBuilder(builder), break_environment_(NULL) {}
+      : ControlBuilder(builder), break_environment_(nullptr) {}
 
   // Primitive control commands.
   void BeginBlock();
   void EndBlock();
 
   // Primitive support for break.
   void Break() final;
 
   // Compound control commands for conditional break.
   void BreakWhen(Node* condition, BranchHint = BranchHint::kNone);
   void BreakUnless(Node* condition, BranchHint hint = BranchHint::kNone);
 
  private:
   Environment* break_environment_;  // Environment after the block exits.
 };
 
 
 // Tracks control flow for a try-catch statement.
 class TryCatchBuilder final : public ControlBuilder {
  public:
   explicit TryCatchBuilder(AstGraphBuilder* builder)
       : ControlBuilder(builder),
-        catch_environment_(NULL),
-        exit_environment_(NULL),
-        exception_node_(NULL) {}
+        catch_environment_(nullptr),
+        exit_environment_(nullptr),
+        exception_node_(nullptr) {}
 
   // Primitive control commands.
   void BeginTry();
   void Throw(Node* exception);
   void EndTry();
   void EndCatch();
 
   // Returns the exception value inside the 'catch' body.
   Node* GetExceptionNode() const { return exception_node_; }
 
  private:
   Environment* catch_environment_;  // Environment for the 'catch' body.
   Environment* exit_environment_;   // Environment after the statement.
   Node* exception_node_;            // Node for exception in 'catch' body.
 };
 
 
 // Tracks control flow for a try-finally statement.
 class TryFinallyBuilder final : public ControlBuilder {
  public:
   explicit TryFinallyBuilder(AstGraphBuilder* builder)
       : ControlBuilder(builder),
-        finally_environment_(NULL),
-        token_node_(NULL),
-        value_node_(NULL) {}
+        finally_environment_(nullptr),
+        token_node_(nullptr),
+        value_node_(nullptr) {}
 
   // Primitive control commands.
   void BeginTry();
   void LeaveTry(Node* token, Node* value);
   void EndTry(Node* token, Node* value);
   void EndFinally();
 
   // Returns the dispatch token value inside the 'finally' body.
   Node* GetDispatchTokenNode() const { return token_node_; }
 
   // Returns the saved result value inside the 'finally' body.
   Node* GetResultValueNode() const { return value_node_; }
 
  private:
   Environment* finally_environment_;  // Environment for the 'finally' body.
   Node* token_node_;                  // Node for token in 'finally' body.
   Node* value_node_;                  // Node for value in 'finally' body.
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_CONTROL_BUILDERS_H_