Basic support for tracking smi-only arrays on ia32.

src/code-stubs.cc

 // Copyright 2011 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 232 matching lines @@
   stream->Add("InstanceofStub%s%s%s",
               args,
               inline_check,
               return_true_false_object);
 }
 
 
 void KeyedLoadElementStub::Generate(MacroAssembler* masm) {
   switch (elements_kind_) {
     case FAST_ELEMENTS:
+    case FAST_SMI_ONLY_ELEMENTS:
       KeyedLoadStubCompiler::GenerateLoadFastElement(masm);
       break;
     case FAST_DOUBLE_ELEMENTS:
       KeyedLoadStubCompiler::GenerateLoadFastDoubleElement(masm);
       break;
     case EXTERNAL_BYTE_ELEMENTS:
     case EXTERNAL_UNSIGNED_BYTE_ELEMENTS:
     case EXTERNAL_SHORT_ELEMENTS:
     case EXTERNAL_UNSIGNED_SHORT_ELEMENTS:
     case EXTERNAL_INT_ELEMENTS:
     case EXTERNAL_UNSIGNED_INT_ELEMENTS:
     case EXTERNAL_FLOAT_ELEMENTS:
     case EXTERNAL_DOUBLE_ELEMENTS:
     case EXTERNAL_PIXEL_ELEMENTS:
       KeyedLoadStubCompiler::GenerateLoadExternalArray(masm, elements_kind_);
       break;
     case DICTIONARY_ELEMENTS:
       KeyedLoadStubCompiler::GenerateLoadDictionaryElement(masm);
       break;
     case NON_STRICT_ARGUMENTS_ELEMENTS:
       UNREACHABLE();
       break;
   }
 }
 
 
 void KeyedStoreElementStub::Generate(MacroAssembler* masm) {
   switch (elements_kind_) {
     case FAST_ELEMENTS:
-      KeyedStoreStubCompiler::GenerateStoreFastElement(masm, is_js_array_);
+    case FAST_SMI_ONLY_ELEMENTS: {
+      KeyedStoreStubCompiler::StoreObjectAction store_object_action =
+          elements_kind_ == FAST_SMI_ONLY_ELEMENTS
+              ? KeyedStoreStubCompiler::kObjectStoreForcesGeneric
+              : KeyedStoreStubCompiler::kObjectStoreCausesWriteBarrier;
+      KeyedStoreStubCompiler::GenerateStoreFastElement(masm,
+                                                       is_js_array_,
+                                                       store_object_action);
+    }
       break;
     case FAST_DOUBLE_ELEMENTS:
       KeyedStoreStubCompiler::GenerateStoreFastDoubleElement(masm,
                                                              is_js_array_);
       break;
     case EXTERNAL_BYTE_ELEMENTS:
     case EXTERNAL_UNSIGNED_BYTE_ELEMENTS:
     case EXTERNAL_SHORT_ELEMENTS:
     case EXTERNAL_UNSIGNED_SHORT_ELEMENTS:
     case EXTERNAL_INT_ELEMENTS:
@@ skipping 108 matching lines @@
 }
 
 
 bool ToBooleanStub::Types::CanBeUndetectable() const {
   return Contains(ToBooleanStub::SPEC_OBJECT)
       || Contains(ToBooleanStub::STRING);
 }
 
 
 } }  // namespace v8::internal