Refactor platform-specific code for determining shared stub for keyed load/stores.

src/x64/stub-cache-x64.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 2512 matching lines @@
   __ bind(&miss);
   __ DecrementCounter(counters->keyed_store_field(), 1);
   Handle<Code> ic = isolate()->builtins()->KeyedStoreIC_Miss();
   __ Jump(ic, RelocInfo::CODE_TARGET);
 
   // Return the generated code.
   return GetCode(transition == NULL ? FIELD : MAP_TRANSITION, name);
 }
 
 
-MaybeObject* KeyedStoreStubCompiler::CompileStoreElement(
-    Map* receiver_map) {
+MaybeObject* KeyedStoreStubCompiler::CompileStoreElement(Map* receiver_map) {
   // ----------- S t a t e -------------
   //  -- rax    : value
   //  -- rcx    : key
   //  -- rdx    : receiver
   //  -- rsp[0] : return address
   // -----------------------------------
-  MaybeObject* maybe_stub;
-  if (receiver_map->has_fast_elements()) {
-    bool is_js_array = receiver_map->instance_type() == JS_ARRAY_TYPE;
-    maybe_stub = KeyedStoreFastElementStub(is_js_array).TryGetCode();
-  } else {
-    ASSERT(receiver_map->has_external_array_elements());
-    JSObject::ElementsKind elements_kind = receiver_map->elements_kind();
-    maybe_stub = KeyedStoreExternalArrayStub(elements_kind).TryGetCode();
-  }
   Code* stub;
+  MaybeObject* maybe_stub = ComputeSharedKeyedStoreElementStub(receiver_map);
   if (!maybe_stub->To(&stub)) return maybe_stub;
   __ DispatchMap(rdx,
                  Handle<Map>(receiver_map),
                  Handle<Code>(stub),
                  DO_SMI_CHECK);
 
   Handle<Code> ic = isolate()->builtins()->KeyedStoreIC_Miss();
   __ jmp(ic, RelocInfo::CODE_TARGET);
 
   // Return the generated code.
@@ skipping 434 matching lines @@
   return GetCode(CALLBACKS, name);
 }
 
 
 MaybeObject* KeyedLoadStubCompiler::CompileLoadElement(Map* receiver_map) {
   // ----------- S t a t e -------------
   //  -- rax    : key
   //  -- rdx    : receiver
   //  -- rsp[0] : return address
   // -----------------------------------
-  MaybeObject* maybe_stub;
-  if (receiver_map->has_fast_elements()) {
-    maybe_stub = KeyedLoadFastElementStub().TryGetCode();
-  } else {
-    ASSERT(receiver_map->has_external_array_elements());
-    JSObject::ElementsKind elements_kind = receiver_map->elements_kind();
-    maybe_stub = KeyedLoadExternalArrayStub(elements_kind).TryGetCode();
-  }
   Code* stub;
+  MaybeObject* maybe_stub = ComputeSharedKeyedLoadElementStub(receiver_map);
   if (!maybe_stub->To(&stub)) return maybe_stub;
   __ DispatchMap(rdx,
                  Handle<Map>(receiver_map),
                  Handle<Code>(stub),
                  DO_SMI_CHECK);
 
   Handle<Code> ic = isolate()->builtins()->KeyedLoadIC_Miss();
   __ jmp(ic, RelocInfo::CODE_TARGET);
 
   // Return the generated code.
@@ skipping 573 matching lines @@
       masm->isolate()->builtins()->KeyedStoreIC_MissForceGeneric();
   __ jmp(ic_force_generic, RelocInfo::CODE_TARGET);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X64