Refactor elements kind conversion.

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 397 matching lines @@
       || Contains(ToBooleanStub::HEAP_NUMBER);
 }
 
 
 bool ToBooleanStub::Types::CanBeUndetectable() const {
   return Contains(ToBooleanStub::SPEC_OBJECT)
       || Contains(ToBooleanStub::STRING);
 }
 
 
-void FastElementsConversionStub::Generate(MacroAssembler* masm) {
-  if (to_ == FAST_ELEMENTS) {
-    if (from_ == FAST_SMI_ONLY_ELEMENTS) {
-      GenerateSmiOnlyToObject(masm, strict_mode_);
-    } else if (from_ == FAST_DOUBLE_ELEMENTS) {
-      GenerateDoubleToObject(masm, strict_mode_);
+void ElementsTransitionAndStoreStub::Generate(MacroAssembler* masm) {
+  Label fail;
+  if (!FLAG_trace_elements_transitions) {
+    if (to_ == FAST_ELEMENTS) {
+      if (from_ == FAST_SMI_ONLY_ELEMENTS) {
+        ElementsTransitionGenerator::GenerateSmiOnlyToObject(masm);
+      } else if (from_ == FAST_DOUBLE_ELEMENTS) {
+        ElementsTransitionGenerator::GenerateDoubleToObject(masm, &fail);
+      } else {
+        UNREACHABLE();
+      }
+      KeyedStoreStubCompiler::GenerateStoreFastElement(masm,
+                                                       is_jsarray_,
+                                                       FAST_ELEMENTS);
+    } else if (from_ == FAST_SMI_ONLY_ELEMENTS && to_ == FAST_DOUBLE_ELEMENTS) {
+      ElementsTransitionGenerator::GenerateSmiOnlyToDouble(masm, &fail);
+      KeyedStoreStubCompiler::GenerateStoreFastDoubleElement(masm, is_jsarray_);
     } else {
       UNREACHABLE();
     }
-    KeyedStoreStubCompiler::GenerateStoreFastElement(masm,
-                                                     is_jsarray_,
-                                                     FAST_ELEMENTS);
-  } else if (from_ == FAST_SMI_ONLY_ELEMENTS && to_ == FAST_DOUBLE_ELEMENTS) {
-    GenerateSmiOnlyToDouble(masm, strict_mode_);
-    KeyedStoreStubCompiler::GenerateStoreFastDoubleElement(masm, is_jsarray_);
-  } else {
-    UNREACHABLE();
   }
+  masm->bind(&fail);
+  KeyedStoreIC::GenerateRuntimeSetProperty(masm, strict_mode_);
 }
 
 } }  // namespace v8::internal