Implement tracking and optimizations of packed arrays

src/x64/code-stubs-x64.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 5975 matching lines @@
   // GenerateStoreField calls the stub with two different permutations of
   // registers.  This is the second.
   { REG(rbx), REG(rcx), REG(rdx), EMIT_REMEMBERED_SET },
   // StoreIC::GenerateNormal via GenerateDictionaryStore.
   { REG(rbx), REG(r8), REG(r9), EMIT_REMEMBERED_SET },
   // KeyedStoreIC::GenerateGeneric.
   { REG(rbx), REG(rdx), REG(rcx), EMIT_REMEMBERED_SET},
   // KeyedStoreStubCompiler::GenerateStoreFastElement.
   { REG(rdi), REG(rbx), REG(rcx), EMIT_REMEMBERED_SET},
   { REG(rdx), REG(rdi), REG(rbx), EMIT_REMEMBERED_SET},
-  // ElementsTransitionGenerator::GenerateSmiOnlyToObject
-  // and ElementsTransitionGenerator::GenerateSmiOnlyToObject
+  // ElementsTransitionGenerator::GenerateMapChangeElementTransition
+  // and ElementsTransitionGenerator::GenerateSmiOnlyToDouble
   // and ElementsTransitionGenerator::GenerateDoubleToObject
   { REG(rdx), REG(rbx), REG(rdi), EMIT_REMEMBERED_SET},
   { REG(rdx), REG(rbx), REG(rdi), OMIT_REMEMBERED_SET},
   // ElementsTransitionGenerator::GenerateSmiOnlyToDouble
   // and ElementsTransitionGenerator::GenerateDoubleToObject
   { REG(rdx), REG(r11), REG(r15), EMIT_REMEMBERED_SET},
   // ElementsTransitionGenerator::GenerateDoubleToObject
   { REG(r11), REG(rax), REG(r15), EMIT_REMEMBERED_SET},
   // StoreArrayLiteralElementStub::Generate
   { REG(rbx), REG(rax), REG(rcx), EMIT_REMEMBERED_SET},
@@ skipping 318 matching lines @@
                                  xmm0,
                                  &slow_elements);
   __ ret(0);
 }
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X64