Remove BaseLoad/StoreStub compilers, and the stub-cache interface duplication.

src/ic.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 1087 matching lines @@
       break;
     case DEBUG_STUB:
       break;
     case GENERIC:
       UNREACHABLE();
       break;
   }
 }
 
 
+Handle<Code> LoadIC::SimpleFieldLoad(int offset,
+                                     bool inobject,
+                                     Representation representation) {
+  if (kind() == Code::LOAD_IC) {
+    LoadFieldStub stub(inobject, offset, representation);
+    return stub.GetCode(isolate());
+  } else {
+    KeyedLoadFieldStub stub(inobject, offset, representation);
+    return stub.GetCode(isolate());
+  }
+}
+
 void LoadIC::UpdateCaches(LookupResult* lookup,
                           Handle<Object> object,
                           Handle<String> name) {
   // TODO(verwaest): It would be nice to support loading fields from smis as
   // well. For now just fail to update the cache.
   if (!object->IsHeapObject()) return;
 
   Handle<HeapObject> receiver = Handle<HeapObject>::cast(object);
 
   Handle<Code> code;
   if (state() == UNINITIALIZED) {
     // This is the first time we execute this inline cache.
     // Set the target to the pre monomorphic stub to delay
     // setting the monomorphic state.
     code = pre_monomorphic_stub();
   } else if (!lookup->IsCacheable()) {
     // Bail out if the result is not cacheable.
     code = slow_stub();
   } else if (object->IsString() &&
              name->Equals(isolate()->heap()->length_string())) {
     int length_index = String::kLengthOffset / kPointerSize;
-    if (target()->is_load_stub()) {
-      LoadFieldStub stub(true, length_index, Representation::Tagged());
-      code = stub.GetCode(isolate());
-    } else {
-      KeyedLoadFieldStub stub(true, length_index, Representation::Tagged());
-      code = stub.GetCode(isolate());
-    }
+    code = SimpleFieldLoad(length_index);
   } else if (!object->IsJSObject()) {
     // TODO(jkummerow): It would be nice to support non-JSObjects in
     // ComputeLoadHandler, then we wouldn't need to go generic here.
     code = slow_stub();
   } else if (!lookup->IsProperty()) {
     code = kind() == Code::LOAD_IC
         ? isolate()->stub_cache()->ComputeLoadNonexistent(
               name, Handle<JSObject>::cast(receiver))
         : slow_stub();
   } else {
@@ skipping 14 matching lines @@
 
 Handle<Code> IC::ComputeHandler(LookupResult* lookup,
                                 Handle<JSObject> receiver,
                                 Handle<String> name,
                                 Handle<Object> value) {
   Handle<Code> code = isolate()->stub_cache()->FindHandler(
       name, receiver, kind());
   if (!code.is_null()) return code;
 
   code = CompileHandler(lookup, receiver, name, value);
-  if (code.is_null()) return slow_stub();
 
   if (code->is_handler() && code->type() != Code::NORMAL) {
     HeapObject::UpdateMapCodeCache(receiver, name, code);
   }
 
   return code;
 }
 
 
 Handle<Code> LoadIC::CompileHandler(LookupResult* lookup,
                                     Handle<JSObject> receiver,
                                     Handle<String> name,
                                     Handle<Object> unused) {
   Handle<JSObject> holder(lookup->holder());
+  LoadStubCompiler compiler(isolate(), kind());
+
   switch (lookup->type()) {
-    case FIELD:
-      return isolate()->stub_cache()->ComputeLoadField(
-          name, receiver, holder,
-          lookup->GetFieldIndex(), lookup->representation());
+    case FIELD: {
+      PropertyIndex field = lookup->GetFieldIndex();
+      if (receiver.is_identical_to(holder)) {
+        return SimpleFieldLoad(field.translate(holder),
+                               field.is_inobject(holder),
+                               lookup->representation());
+      }
+      return compiler.CompileLoadField(
+          receiver, holder, name, field, lookup->representation());
+    }
     case CONSTANT: {
       Handle<Object> constant(lookup->GetConstant(), isolate());
       // TODO(2803): Don't compute a stub for cons strings because they cannot
       // be embedded into code.
-      if (constant->IsConsString()) return Handle<Code>::null();
-      return isolate()->stub_cache()->ComputeLoadConstant(
-          name, receiver, holder, constant);
+      if (constant->IsConsString()) break;
+      return compiler.CompileLoadConstant(receiver, holder, name, constant);
     }
     case NORMAL:
+      if (kind() != Code::LOAD_IC) break;
       if (holder->IsGlobalObject()) {
         Handle<GlobalObject> global = Handle<GlobalObject>::cast(holder);
         Handle<PropertyCell> cell(
             global->GetPropertyCell(lookup), isolate());
+        // TODO(verwaest): Turn into a handler.
         return isolate()->stub_cache()->ComputeLoadGlobal(
             name, receiver, global, cell, lookup->IsDontDelete());
       }
       // There is only one shared stub for loading normalized
       // properties. It does not traverse the prototype chain, so the
       // property must be found in the receiver for the stub to be
       // applicable.
       if (!holder.is_identical_to(receiver)) break;
-      return isolate()->stub_cache()->ComputeLoadNormal(name, receiver);
+      return isolate()->builtins()->LoadIC_Normal();
     case CALLBACKS: {
-      {
-        // Use simple field loads for some well-known callback properties.
-        int object_offset;
-        Handle<Map> map(receiver->map());
-        if (Accessors::IsJSObjectFieldAccessor(map, name, &object_offset)) {
-          PropertyIndex index =
-              PropertyIndex::NewHeaderIndex(object_offset / kPointerSize);
-          return isolate()->stub_cache()->ComputeLoadField(
-              name, receiver, receiver, index, Representation::Tagged());
-        }
+      // Use simple field loads for some well-known callback properties.
+      int object_offset;
+      Handle<Map> map(receiver->map());
+      if (Accessors::IsJSObjectFieldAccessor(map, name, &object_offset)) {
+        PropertyIndex index =
+            PropertyIndex::NewHeaderIndex(object_offset / kPointerSize);
+        return compiler.CompileLoadField(
+            receiver, receiver, name, index, Representation::Tagged());
       }
 
       Handle<Object> callback(lookup->GetCallbackObject(), isolate());
       if (callback->IsExecutableAccessorInfo()) {
         Handle<ExecutableAccessorInfo> info =
             Handle<ExecutableAccessorInfo>::cast(callback);
         if (v8::ToCData<Address>(info->getter()) == 0) break;
         if (!info->IsCompatibleReceiver(*receiver)) break;
-        return isolate()->stub_cache()->ComputeLoadCallback(
-            name, receiver, holder, info);
+        return compiler.CompileLoadCallback(receiver, holder, name, info);
       } else if (callback->IsAccessorPair()) {
         Handle<Object> getter(Handle<AccessorPair>::cast(callback)->getter(),
                               isolate());
         if (!getter->IsJSFunction()) break;
         if (holder->IsGlobalObject()) break;
         if (!holder->HasFastProperties()) break;
         Handle<JSFunction> function = Handle<JSFunction>::cast(getter);
         CallOptimization call_optimization(function);
         if (call_optimization.is_simple_api_call() &&
             call_optimization.IsCompatibleReceiver(*receiver)) {
-          return isolate()->stub_cache()->ComputeLoadCallback(
-              name, receiver, holder, call_optimization);
+          return compiler.CompileLoadCallback(
+              receiver, holder, name, call_optimization);
         }
-        return isolate()->stub_cache()->ComputeLoadViaGetter(
-            name, receiver, holder, function);
+        return compiler.CompileLoadViaGetter(receiver, holder, name, function);
       }
       // TODO(dcarney): Handle correctly.
       if (callback->IsDeclaredAccessorInfo()) break;
       ASSERT(callback->IsForeign());
       // No IC support for old-style native accessors.
       break;
     }
     case INTERCEPTOR:
       ASSERT(HasInterceptorGetter(*holder));
-      return isolate()->stub_cache()->ComputeLoadInterceptor(
-          name, receiver, holder);
+      return compiler.CompileLoadInterceptor(receiver, holder, name);
     default:
       break;
   }
-  return Handle<Code>::null();
+
+  return slow_stub();
 }
 
 
 static Handle<Object> TryConvertKey(Handle<Object> key, Isolate* isolate) {
   // This helper implements a few common fast cases for converting
   // non-smi keys of keyed loads/stores to a smi or a string.
   if (key->IsHeapNumber()) {
     double value = Handle<HeapNumber>::cast(key)->value();
     if (std::isnan(value)) {
       key = isolate->factory()->nan_string();
@@ skipping 111 matching lines @@
     ASSERT(!stub.is_null());
     set_target(*stub);
     TRACE_IC("LoadIC", key);
   }
 
 
   return Runtime::GetObjectPropertyOrFail(isolate(), object, key);
 }
 
 
-Handle<Code> KeyedLoadIC::CompileHandler(LookupResult* lookup,
-                                         Handle<JSObject> receiver,
-                                         Handle<String> name,
-                                         Handle<Object> value) {
-  // Compute a monomorphic stub.
-  Handle<JSObject> holder(lookup->holder(), isolate());
-  switch (lookup->type()) {
-    case FIELD:
-      return isolate()->stub_cache()->ComputeKeyedLoadField(
-          name, receiver, holder,
-          lookup->GetFieldIndex(), lookup->representation());
-    case CONSTANT: {
-      Handle<Object> constant(lookup->GetConstant(), isolate());
-      // TODO(2803): Don't compute a stub for cons strings because they cannot
-      // be embedded into code.
-      if (constant->IsConsString()) return Handle<Code>::null();
-      return isolate()->stub_cache()->ComputeKeyedLoadConstant(
-          name, receiver, holder, constant);
-    }
-    case CALLBACKS: {
-      Handle<Object> callback_object(lookup->GetCallbackObject(), isolate());
-      // TODO(dcarney): Handle DeclaredAccessorInfo correctly.
-      if (callback_object->IsExecutableAccessorInfo()) {
-        Handle<ExecutableAccessorInfo> callback =
-            Handle<ExecutableAccessorInfo>::cast(callback_object);
-        if (v8::ToCData<Address>(callback->getter()) == 0) break;
-        if (!callback->IsCompatibleReceiver(*receiver)) break;
-        return isolate()->stub_cache()->ComputeKeyedLoadCallback(
-            name, receiver, holder, callback);
-      } else if (callback_object->IsAccessorPair()) {
-        Handle<Object> getter(
-            Handle<AccessorPair>::cast(callback_object)->getter(),
-            isolate());
-        if (!getter->IsJSFunction()) break;
-        if (holder->IsGlobalObject()) break;
-        if (!holder->HasFastProperties()) break;
-        Handle<JSFunction> function = Handle<JSFunction>::cast(getter);
-        CallOptimization call_optimization(function);
-        if (call_optimization.is_simple_api_call() &&
-            call_optimization.IsCompatibleReceiver(*receiver)) {
-          return isolate()->stub_cache()->ComputeKeyedLoadCallback(
-              name, receiver, holder, call_optimization);
-        }
-      }
-      break;
-    }
-    case INTERCEPTOR:
-      ASSERT(HasInterceptorGetter(lookup->holder()));
-      return isolate()->stub_cache()->ComputeKeyedLoadInterceptor(
-          name, receiver, holder);
-    default:
-      // Always rewrite to the generic case so that we do not
-      // repeatedly try to rewrite.
-      return generic_stub();
-  }
-  return Handle<Code>::null();
-}
-
-
 static bool LookupForWrite(Handle<JSObject> receiver,
                            Handle<String> name,
                            Handle<Object> value,
                            LookupResult* lookup,
                            IC* ic) {
   Handle<JSObject> holder = receiver;
   receiver->Lookup(*name, lookup);
   if (lookup->IsFound()) {
     if (lookup->IsReadOnly() || !lookup->IsCacheable()) return false;
 
@@ skipping 177 matching lines @@
   PatchCache(receiver, name, code);
   TRACE_IC("StoreIC", name);
 }
 
 
 Handle<Code> StoreIC::CompileHandler(LookupResult* lookup,
                                      Handle<JSObject> receiver,
                                      Handle<String> name,
                                      Handle<Object> value) {
   Handle<JSObject> holder(lookup->holder());
+  StoreStubCompiler compiler(isolate(), strict_mode(), kind());
   switch (lookup->type()) {
     case FIELD:
-      return isolate()->stub_cache()->ComputeStoreField(
-          name, receiver, lookup, strict_mode());
+      return compiler.CompileStoreField(receiver, lookup, name);
+    case TRANSITION: {
+      // Explicitly pass in the receiver map since LookupForWrite may have
+      // stored something else than the receiver in the holder.
+      Handle<Map> transition(
+          lookup->GetTransitionTarget(receiver->map()), isolate());
+      int descriptor = transition->LastAdded();
+
+      DescriptorArray* target_descriptors = transition->instance_descriptors();
+      PropertyDetails details = target_descriptors->GetDetails(descriptor);
+
+      if (details.type() == CALLBACKS || details.attributes() != NONE) break;
+
+      return compiler.CompileStoreTransition(
+          receiver, lookup, transition, name);
+    }
     case NORMAL:
+      if (kind() == Code::KEYED_STORE_IC) break;
       if (receiver->IsGlobalObject()) {
         // The stub generated for the global object picks the value directly
         // from the property cell. So the property must be directly on the
         // global object.
         Handle<GlobalObject> global = Handle<GlobalObject>::cast(receiver);
         Handle<PropertyCell> cell(
             global->GetPropertyCell(lookup), isolate());
+        // TODO(verwaest): Turn into a handler.
         return isolate()->stub_cache()->ComputeStoreGlobal(
             name, global, cell, value, strict_mode());
       }
       ASSERT(holder.is_identical_to(receiver));
-      return isolate()->stub_cache()->ComputeStoreNormal(strict_mode());
+      return strict_mode() == kStrictMode
+          ? isolate()->builtins()->StoreIC_Normal_Strict()
+          : isolate()->builtins()->StoreIC_Normal();
     case CALLBACKS: {
+      if (kind() == Code::KEYED_STORE_IC) break;
       Handle<Object> callback(lookup->GetCallbackObject(), isolate());
       if (callback->IsExecutableAccessorInfo()) {
         Handle<ExecutableAccessorInfo> info =
             Handle<ExecutableAccessorInfo>::cast(callback);
         if (v8::ToCData<Address>(info->setter()) == 0) break;
         if (!holder->HasFastProperties()) break;
         if (!info->IsCompatibleReceiver(*receiver)) break;
-        return isolate()->stub_cache()->ComputeStoreCallback(
-            name, receiver, holder, info, strict_mode());
+        return compiler.CompileStoreCallback(receiver, holder, name, info);
       } else if (callback->IsAccessorPair()) {
         Handle<Object> setter(
             Handle<AccessorPair>::cast(callback)->setter(), isolate());
         if (!setter->IsJSFunction()) break;
         if (holder->IsGlobalObject()) break;
         if (!holder->HasFastProperties()) break;
         Handle<JSFunction> function = Handle<JSFunction>::cast(setter);
         CallOptimization call_optimization(function);
         if (call_optimization.is_simple_api_call() &&
             call_optimization.IsCompatibleReceiver(*receiver)) {
-          return isolate()->stub_cache()->ComputeStoreCallback(
-              name, receiver, holder, call_optimization, strict_mode());
+          return compiler.CompileStoreCallback(
+              receiver, holder, name, call_optimization);
         }
-        return isolate()->stub_cache()->ComputeStoreViaSetter(
-            name, receiver, holder, Handle<JSFunction>::cast(setter),
-            strict_mode());
+        return compiler.CompileStoreViaSetter(
+            receiver, holder, name, Handle<JSFunction>::cast(setter));
       }
       // TODO(dcarney): Handle correctly.
       if (callback->IsDeclaredAccessorInfo()) break;
       ASSERT(callback->IsForeign());
       // No IC support for old-style native accessors.
       break;
     }
     case INTERCEPTOR:
+      if (kind() == Code::KEYED_STORE_IC) break;
       ASSERT(HasInterceptorSetter(*receiver));
-      return isolate()->stub_cache()->ComputeStoreInterceptor(
-          name, receiver, strict_mode());
+      return compiler.CompileStoreInterceptor(receiver, name);
     case CONSTANT:
       break;
-    case TRANSITION: {
-      // Explicitly pass in the receiver map since LookupForWrite may have
-      // stored something else than the receiver in the holder.
-      Handle<Map> transition(
-          lookup->GetTransitionTarget(receiver->map()), isolate());
-      int descriptor = transition->LastAdded();
-
-      DescriptorArray* target_descriptors = transition->instance_descriptors();
-      PropertyDetails details = target_descriptors->GetDetails(descriptor);
-
-      if (details.type() == CALLBACKS || details.attributes() != NONE) break;
-
-      return isolate()->stub_cache()->ComputeStoreTransition(
-          name, receiver, lookup, transition, strict_mode());
-    }
     case NONEXISTENT:
     case HANDLER:
       UNREACHABLE();
       break;
   }
-  return Handle<Code>::null();
+  return slow_stub();
 }
 
 
 Handle<Code> KeyedStoreIC::StoreElementStub(Handle<JSObject> receiver,
                                             KeyedAccessStoreMode store_mode) {
   // Don't handle megamorphic property accesses for INTERCEPTORS or CALLBACKS
   // via megamorphic stubs, since they don't have a map in their relocation info
   // and so the stubs can't be harvested for the object needed for a map check.
   if (target()->type() != Code::NORMAL) {
     TRACE_GENERIC_IC(isolate(), "KeyedIC", "non-NORMAL target type");
@@ skipping 290 matching lines @@
     ASSERT(!stub.is_null());
     set_target(*stub);
     TRACE_IC("StoreIC", key);
   }
 
   return Runtime::SetObjectPropertyOrFail(
       isolate(), object , key, value, NONE, strict_mode());
 }
 
 
-Handle<Code> KeyedStoreIC::CompileHandler(LookupResult* lookup,
-                                          Handle<JSObject> receiver,
-                                          Handle<String> name,
-                                          Handle<Object> value) {
-  // If the property has a non-field type allowing map transitions
-  // where there is extra room in the object, we leave the IC in its
-  // current state.
-  switch (lookup->type()) {
-    case FIELD:
-      return isolate()->stub_cache()->ComputeKeyedStoreField(
-          name, receiver, lookup, strict_mode());
-    case TRANSITION: {
-      // Explicitly pass in the receiver map since LookupForWrite may have
-      // stored something else than the receiver in the holder.
-      Handle<Map> transition(
-          lookup->GetTransitionTarget(receiver->map()), isolate());
-      int descriptor = transition->LastAdded();
-
-      DescriptorArray* target_descriptors = transition->instance_descriptors();
-      PropertyDetails details = target_descriptors->GetDetails(descriptor);
-
-      if (details.type() != CALLBACKS && details.attributes() == NONE) {
-        return isolate()->stub_cache()->ComputeKeyedStoreTransition(
-            name, receiver, lookup, transition, strict_mode());
-      }
-      // fall through.
-    }
-    case NORMAL:
-    case CONSTANT:
-    case CALLBACKS:
-    case INTERCEPTOR:
-      // Always rewrite to the generic case so that we do not
-      // repeatedly try to rewrite.
-      return generic_stub();
-    case HANDLER:
-    case NONEXISTENT:
-      UNREACHABLE();
-      break;
-  }
-  return Handle<Code>::null();
-}
-
-
 #undef TRACE_IC
 
 
 // ----------------------------------------------------------------------------
 // Static IC stub generators.
 //
 
 // Used from ic-<arch>.cc.
 RUNTIME_FUNCTION(MaybeObject*, CallIC_Miss) {
   HandleScope scope(isolate);
@@ skipping 712 matching lines @@
 #undef ADDR
 };
 
 
 Address IC::AddressFromUtilityId(IC::UtilityId id) {
   return IC_utilities[id];
 }
 
 
 } }  // namespace v8::internal