--debug-code: sanity-checking instrumentation for Lithium object accesses

src/x64/lithium-codegen-x64.h

 // Copyright 2012 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_X64_LITHIUM_CODEGEN_X64_H_
 #define V8_X64_LITHIUM_CODEGEN_X64_H_
 
 #include "src/x64/lithium-x64.h"
 
 #include "src/checks.h"
@@ skipping 86 matching lines @@
                                    Register object,
                                    Register index);
 
 // Parallel move support.
   void DoParallelMove(LParallelMove* move);
   void DoGap(LGap* instr);
 
   // Emit frame translation commands for an environment.
   void WriteTranslation(LEnvironment* environment, Translation* translation);
 
+#ifdef DEBUG
+  void EmitKeyedAccessCheck(LOperand* elements, Operand operand);
+  void EmitObjectAccessChecks(HObjectAccess* access, Register object,
+                              bool is_store);
+  void EmitCheckMap(Register object, Handle<Map> map);
+  void EmitCheckInstanceType(Register object, InstanceType type,
+                             Condition condition = equal);
+#endif
+
   // Declare methods that deal with the individual node types.
 #define DECLARE_DO(type) void Do##type(L##type* node);
   LITHIUM_CONCRETE_INSTRUCTION_LIST(DECLARE_DO)
 #undef DECLARE_DO
 
  private:
   StrictMode strict_mode() const { return info()->strict_mode(); }
 
   LPlatformChunk* chunk() const { return chunk_; }
   Scope* scope() const { return scope_; }
@@ skipping 270 matching lines @@
   Label entry_;
   Label exit_;
   Label done_;
   Label* external_exit_;
   int instruction_index_;
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_X64_LITHIUM_CODEGEN_X64_H_