Never hchange nan-hole to hole or hole to nan-hole.

src/arm/lithium-codegen-arm.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 262 matching lines @@
                          CallKind call_kind,
                          R1State r1_state);
 
   void LoadHeapObject(Register result, Handle<HeapObject> object);
 
   void RecordSafepointWithLazyDeopt(LInstruction* instr,
                                     SafepointMode safepoint_mode);
 
   void RegisterEnvironmentForDeoptimization(LEnvironment* environment,
                                             Safepoint::DeoptMode mode);
-  void DeoptimizeIf(Condition cc,
+  void DeoptimizeIf(Condition condition,
                     LEnvironment* environment,
                     Deoptimizer::BailoutType bailout_type);
-  void DeoptimizeIf(Condition cc, LEnvironment* environment);
-  void ApplyCheckIf(Condition cc, LBoundsCheck* check);
+  void DeoptimizeIf(Condition condition, LEnvironment* environment);
+  void ApplyCheckIf(Condition condition, LBoundsCheck* check);
 
   void AddToTranslation(LEnvironment* environment,
                         Translation* translation,
                         LOperand* op,
                         bool is_tagged,
                         bool is_uint32,
                         int* object_index_pointer,
                         int* dematerialized_index_pointer);
   void RegisterDependentCodeForEmbeddedMaps(Handle<Code> code);
   void PopulateDeoptimizationData(Handle<Code> code);
@@ skipping 17 matching lines @@
                                     int arguments,
                                     Safepoint::DeoptMode mode);
   void RecordSafepointWithRegistersAndDoubles(LPointerMap* pointers,
                                               int arguments,
                                               Safepoint::DeoptMode mode);
   void RecordPosition(int position);
 
   static Condition TokenToCondition(Token::Value op, bool is_unsigned);
   void EmitGoto(int block);
   template<class InstrType>
-  void EmitBranch(InstrType instr, Condition cc);
+  void EmitBranch(InstrType instr, Condition condition);
+  template<class InstrType>
+  void EmitFalseBranch(InstrType instr, Condition condition);
   void EmitNumberUntagD(Register input,
                         DwVfpRegister result,
                         bool allow_undefined_as_nan,
                         bool deoptimize_on_minus_zero,
                         LEnvironment* env,
                         NumberUntagDMode mode);
 
   // Emits optimized code for typeof x == "y".  Modifies input register.
   // Returns the condition on which a final split to
   // true and false label should be made, to optimize fallthrough.
@@ skipping 158 matching lines @@
   LCodeGen* codegen_;
   Label entry_;
   Label exit_;
   Label* external_exit_;
   int instruction_index_;
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_ARM_LITHIUM_CODEGEN_ARM_H_