Implement tracking and optimizations of packed arrays

src/ia32/codegen-ia32.cc

 // 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 333 matching lines @@
   return FUNCTION_CAST<OS::MemCopyFunction>(buffer);
 }
 
 #undef __
 
 // -------------------------------------------------------------------------
 // Code generators
 
 #define __ ACCESS_MASM(masm)
 
-void ElementsTransitionGenerator::GenerateSmiOnlyToObject(
+void ElementsTransitionGenerator::GenerateMapChangeElementTransition(
     MacroAssembler* masm) {
   // ----------- S t a t e -------------
   //  -- eax    : value
   //  -- ebx    : target map
   //  -- ecx    : key
   //  -- edx    : receiver
   //  -- esp[0] : return address
   // -----------------------------------
   // Set transitioned map.
   __ mov(FieldOperand(edx, HeapObject::kMapOffset), ebx);
   __ RecordWriteField(edx,
                       HeapObject::kMapOffset,
                       ebx,
                       edi,
                       kDontSaveFPRegs,
                       EMIT_REMEMBERED_SET,
                       OMIT_SMI_CHECK);
 }
 
 
-void ElementsTransitionGenerator::GenerateSmiOnlyToDouble(
+void ElementsTransitionGenerator::GenerateSmiToDouble(
     MacroAssembler* masm, Label* fail) {
   // ----------- S t a t e -------------
   //  -- eax    : value
   //  -- ebx    : target map
   //  -- ecx    : key
   //  -- edx    : receiver
   //  -- esp[0] : return address
   // -----------------------------------
   Label loop, entry, convert_hole, gc_required, only_change_map;
 
@@ skipping 367 matching lines @@
                                   times_1,
                                   SeqAsciiString::kHeaderSize));
   __ bind(&done);
 }
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_IA32