Implement tracking and optimizations of packed arrays

src/arm/macro-assembler-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 494 matching lines @@
   void LoadTransitionedArrayMapConditional(
       ElementsKind expected_kind,
       ElementsKind transitioned_kind,
       Register map_in_out,
       Register scratch,
       Label* no_map_match);
 
   // Load the initial map for new Arrays from a JSFunction.
   void LoadInitialArrayMap(Register function_in,
                            Register scratch,
-                           Register map_out);
+                           Register map_out,
+                           bool can_have_holes);
 
   void LoadGlobalFunction(int index, Register function);
 
   // Load the initial map from the global function. The registers
   // function and map can be the same, function is then overwritten.
   void LoadGlobalFunctionInitialMap(Register function,
                                     Register map,
                                     Register scratch);
 
   void InitializeRootRegister() {
@@ skipping 269 matching lines @@
                          Label* fail);
 
   // Check if a map for a JSObject indicates that the object can have both smi
   // and HeapObject elements.  Jump to the specified label if it does not.
   void CheckFastObjectElements(Register map,
                                Register scratch,
                                Label* fail);
 
   // Check if a map for a JSObject indicates that the object has fast smi only
   // elements.  Jump to the specified label if it does not.
-  void CheckFastSmiOnlyElements(Register map,
-                                Register scratch,
-                                Label* fail);
+  void CheckFastSmiElements(Register map,
+                            Register scratch,
+                            Label* fail);
 
   // Check to see if maybe_number can be stored as a double in
   // FastDoubleElements. If it can, store it at the index specified by key in
   // the FastDoubleElements array elements. Otherwise jump to fail, in which
   // case scratch2, scratch3 and scratch4 are unmodified.
   void StoreNumberToDoubleElements(Register value_reg,
                                    Register key_reg,
                                    Register receiver_reg,
                                    Register elements_reg,
                                    Register scratch1,
@@ skipping 560 matching lines @@
 #define __FILE_LINE__ __FILE__ ":" CODE_COVERAGE_TOSTRING(__LINE__)
 #define ACCESS_MASM(masm) masm->stop(__FILE_LINE__); masm->
 #else
 #define ACCESS_MASM(masm) masm->
 #endif
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_ARM_MACRO_ASSEMBLER_ARM_H_