Use mutable heapnumbers to store doubles in fields.

src/stub-cache.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 203 matching lines @@
   handler =
       compiler.CompileLoadNonexistent(receiver, current, cache_name, global);
   JSObject::UpdateMapCodeCache(receiver, cache_name, handler);
   return handler;
 }
 
 
 Handle<Code> StubCache::ComputeLoadField(Handle<Name> name,
                                          Handle<JSObject> receiver,
                                          Handle<JSObject> holder,
-                                         PropertyIndex field) {
+                                         PropertyIndex field,
+                                         Representation representation) {
   if (receiver.is_identical_to(holder)) {
     LoadFieldStub stub(field.is_inobject(holder),
-                       field.translate(holder));
+                       field.translate(holder),
+                       representation);
     return stub.GetCode(isolate());
   }
 
   Handle<JSObject> stub_holder = StubHolder(receiver, holder);
   Handle<Code> stub = FindHandler(
       name, receiver, stub_holder, Code::LOAD_IC, Code::FIELD);
   if (!stub.is_null()) return stub;
 
   LoadStubCompiler compiler(isolate_);
   Handle<Code> handler =
-      compiler.CompileLoadField(receiver, holder, name, field);
+      compiler.CompileLoadField(receiver, holder, name, field, representation);
   JSObject::UpdateMapCodeCache(stub_holder, name, handler);
   return handler;
 }
 
 
 Handle<Code> StubCache::ComputeLoadCallback(
     Handle<Name> name,
     Handle<JSObject> receiver,
     Handle<JSObject> holder,
     Handle<ExecutableAccessorInfo> callback) {
@@ skipping 80 matching lines @@
   Handle<Code> ic =
       compiler.CompileLoadGlobal(receiver, holder, cell, name, is_dont_delete);
   JSObject::UpdateMapCodeCache(stub_holder, name, ic);
   return ic;
 }
 
 
 Handle<Code> StubCache::ComputeKeyedLoadField(Handle<Name> name,
                                               Handle<JSObject> receiver,
                                               Handle<JSObject> holder,
-                                              PropertyIndex field) {
+                                              PropertyIndex field,
+                                              Representation representation) {
   if (receiver.is_identical_to(holder)) {
     KeyedLoadFieldStub stub(field.is_inobject(holder),
-                            field.translate(holder));
+                            field.translate(holder),
+                            representation);
     return stub.GetCode(isolate());
   }
 
   Handle<JSObject> stub_holder = StubHolder(receiver, holder);
   Handle<Code> stub = FindHandler(
       name, receiver, stub_holder, Code::KEYED_LOAD_IC, Code::FIELD);
   if (!stub.is_null()) return stub;
 
   KeyedLoadStubCompiler compiler(isolate_);
   Handle<Code> handler =
-      compiler.CompileLoadField(receiver, holder, name, field);
+      compiler.CompileLoadField(receiver, holder, name, field, representation);
   JSObject::UpdateMapCodeCache(stub_holder, name, handler);
   return handler;
 }
 
 
 Handle<Code> StubCache::ComputeKeyedLoadConstant(Handle<Name> name,
                                                  Handle<JSObject> receiver,
                                                  Handle<JSObject> holder,
                                                  Handle<JSFunction> value) {
   Handle<JSObject> stub_holder = StubHolder(receiver, holder);
@@ skipping 1123 matching lines @@
                                                Label* success) {
   Label miss;
 
   Register reg = HandlerFrontendHeader(object, object_reg, holder, name, &miss);
 
   HandlerFrontendFooter(success, &miss);
   return reg;
 }
 
 
-Handle<Code> BaseLoadStubCompiler::CompileLoadField(Handle<JSObject> object,
-                                                    Handle<JSObject> holder,
-                                                    Handle<Name> name,
-                                                    PropertyIndex field) {
+Handle<Code> BaseLoadStubCompiler::CompileLoadField(
+    Handle<JSObject> object,
+    Handle<JSObject> holder,
+    Handle<Name> name,
+    PropertyIndex field,
+    Representation representation) {
   Label miss;
 
   Register reg = HandlerFrontendHeader(object, receiver(), holder, name, &miss);
 
-  GenerateLoadField(reg, holder, field);
+  GenerateLoadField(reg, holder, field, representation);
 
   __ bind(&miss);
   TailCallBuiltin(masm(), MissBuiltin(kind()));
 
   // Return the generated code.
   return GetCode(kind(), Code::FIELD, name);
 }
 
 
-// Load a fast property out of a holder object (src). In-object properties
-// are loaded directly otherwise the property is loaded from the properties
-// fixed array.
-void StubCompiler::GenerateFastPropertyLoad(MacroAssembler* masm,
-                                            Register dst,
-                                            Register src,
-                                            Handle<JSObject> holder,
-                                            PropertyIndex index) {
-  DoGenerateFastPropertyLoad(
-      masm, dst, src, index.is_inobject(holder), index.translate(holder));
-}
-
-
 Handle<Code> BaseLoadStubCompiler::CompileLoadConstant(
     Handle<JSObject> object,
     Handle<JSObject> holder,
     Handle<Name> name,
     Handle<JSFunction> value) {
   Label success;
   HandlerFrontend(object, receiver(), holder, name, &success);
   __ bind(&success);
   GenerateLoadConstant(value);
 
@@ skipping 42 matching lines @@
 void BaseLoadStubCompiler::GenerateLoadPostInterceptor(
     Register interceptor_reg,
     Handle<JSObject> interceptor_holder,
     Handle<Name> name,
     LookupResult* lookup) {
   Label success;
   Handle<JSObject> holder(lookup->holder());
   if (lookup->IsField()) {
     PropertyIndex field = lookup->GetFieldIndex();
     if (interceptor_holder.is_identical_to(holder)) {
-      GenerateLoadField(interceptor_reg, holder, field);
+      GenerateLoadField(
+          interceptor_reg, holder, field, lookup->representation());
     } else {
       // We found FIELD property in prototype chain of interceptor's holder.
       // Retrieve a field from field's holder.
       Register reg = HandlerFrontend(
           interceptor_holder, interceptor_reg, holder, name, &success);
       __ bind(&success);
-      GenerateLoadField(reg, holder, field);
+      GenerateLoadField(
+          reg, holder, field, lookup->representation());
     }
   } else {
     // We found CALLBACKS property in prototype chain of interceptor's
     // holder.
     ASSERT(lookup->type() == CALLBACKS);
     Handle<ExecutableAccessorInfo> callback(
         ExecutableAccessorInfo::cast(lookup->GetCallbackObject()));
     ASSERT(callback->getter() != NULL);
 
     Register reg = CallbackHandlerFrontend(
@@ skipping 31 matching lines @@
   // Return the generated code.
   return GetCode(kind(), Code::CALLBACKS, name);
 }
 
 
 Handle<Code> BaseStoreStubCompiler::CompileStoreTransition(
     Handle<JSObject> object,
     LookupResult* lookup,
     Handle<Map> transition,
     Handle<Name> name) {
-  Label miss, miss_restore_name;
+  Label miss, miss_restore_name, slow;
 
   GenerateNameCheck(name, this->name(), &miss);
 
   GenerateStoreTransition(masm(),
                           object,
                           lookup,
                           transition,
                           name,
                           receiver(), this->name(), value(),
                           scratch1(), scratch2(),
                           &miss,
-                          &miss_restore_name);
+                          &miss_restore_name,
+                          &slow);
 
   // Handle store cache miss.
   GenerateRestoreName(masm(), &miss_restore_name, name);
   __ bind(&miss);
   TailCallBuiltin(masm(), MissBuiltin(kind()));
 
+  GenerateRestoreName(masm(), &slow, name);
+  TailCallBuiltin(masm(), SlowBuiltin(kind()));
+
   // Return the generated code.
   return GetICCode(kind(), Code::MAP_TRANSITION, name);
 }
 
 
 Handle<Code> BaseStoreStubCompiler::CompileStoreField(Handle<JSObject> object,
                                                       LookupResult* lookup,
                                                       Handle<Name> name) {
   Label miss;
 
@@ skipping 411 matching lines @@
           Handle<FunctionTemplateInfo>(
               FunctionTemplateInfo::cast(signature->receiver()));
     }
   }
 
   is_simple_api_call_ = true;
 }
 
 
 } }  // namespace v8::internal