[stubs] Implement fast TF Builtin for Object.create

src/code-stub-assembler.h

Index: src/code-stub-assembler.h
diff --git a/src/code-stub-assembler.h b/src/code-stub-assembler.h
index 8ec67ee82611f8a8907628cc5a59595ec5b2b3ab..4c81ff5d0cd6bb4b6b86b803946a9f7e468a14a1 100644
--- a/src/code-stub-assembler.h
+++ b/src/code-stub-assembler.h
@@ -188,6 +188,11 @@ class CodeStubAssembler : public compiler::CodeAssembler {
                          if_notequal);
   }
 
+  void BranchIfJSReceiver(compiler::Node* object, Label* if_true,

[Igor Sheludko, 2016/10/18 12:33:21]

I think if_receiver/if_not_receiver are better names.

+                          Label* if_false);
+  void BranchIfJSObject(compiler::Node* object, Label* if_true,

[Igor Sheludko, 2016/10/18 12:33:21]

Same here.

+                        Label* if_false);
+
   void BranchIfFastJSArray(compiler::Node* object, compiler::Node* context,
                            Label* if_true, Label* if_false);
 
@@ -223,6 +228,8 @@ class CodeStubAssembler : public compiler::CodeAssembler {
   compiler::Node* LoadMap(compiler::Node* object);
   // Load the instance type of an HeapObject.
   compiler::Node* LoadInstanceType(compiler::Node* object);
+  // Compare the instance the type of the object against the provided one.
+  compiler::Node* HasInstanceType(compiler::Node* object, InstanceType type);
   // Checks that given heap object has given instance type.
   void AssertInstanceType(compiler::Node* object, InstanceType instance_type);
   // Load the properties backing store of a JSObject.
@@ -247,8 +254,14 @@ class CodeStubAssembler : public compiler::CodeAssembler {
   compiler::Node* LoadMapElementsKind(compiler::Node* map);
   // Load the instance descriptors of a map.
   compiler::Node* LoadMapDescriptors(compiler::Node* map);
+  // Load the number of own descriptors from a map.
+  compiler::Node* LoadMapNumberOfOwnDescriptors(compiler::Node* map);
   // Load the prototype of a map.
   compiler::Node* LoadMapPrototype(compiler::Node* map);
+  // Load the prototype info of a map. The result has to be checked if it is a
+  // prototype info object or not.
+  compiler::Node* LoadMapPrototypeInfo(compiler::Node* map,
+                                       Label* if_has_no_proto_info);
   // Load the instance size of a Map.
   compiler::Node* LoadMapInstanceSize(compiler::Node* map);
   // Load the inobject properties count of a Map (valid only for JSObjects).
@@ -257,6 +270,12 @@ class CodeStubAssembler : public compiler::CodeAssembler {
   compiler::Node* LoadMapConstructorFunctionIndex(compiler::Node* map);
   // Load the constructor of a Map (equivalent to Map::GetConstructor()).
   compiler::Node* LoadMapConstructor(compiler::Node* map);
+  // Check whether the map is for fast properties.
+  compiler::Node* IsFastMap(compiler::Node* map);
+  // Check whether the map is for an object with special properties, such as a
+  // JSProxy or an object with interceptors.
+  compiler::Node* IsSpecialReceiverMap(compiler::Node* map);
+  compiler::Node* IsSpecialReceiverInstanceType(compiler::Node* instance_type);
 
   // Load the hash field of a name as an uint32 value.
   compiler::Node* LoadNameHashField(compiler::Node* name);
@@ -335,6 +354,10 @@ class CodeStubAssembler : public compiler::CodeAssembler {
       compiler::Node* object, compiler::Node* index, compiler::Node* value,
       ParameterMode parameter_mode = INTEGER_PARAMETERS);
 
+  void StoreFieldsNoWriteBarrier(compiler::Node* start_address,
+                                 compiler::Node* end_address,
+                                 compiler::Node* value);
+
   // Allocate a HeapNumber without initializing its value.
   compiler::Node* AllocateHeapNumber(MutableMode mode = IMMUTABLE);
   // Allocate a HeapNumber with a specific value.
@@ -382,6 +405,19 @@ class CodeStubAssembler : public compiler::CodeAssembler {
                                        compiler::Node* index,
                                        compiler::Node* input);
 
+  compiler::Node* AllocateJSObjectFromMap(compiler::Node* map,
+                                          compiler::Node* properties = nullptr,
+                                          compiler::Node* elements = nullptr);
+
+  void InitializeJSObjectFromMap(compiler::Node* object, compiler::Node* map,
+                                 compiler::Node* size,
+                                 compiler::Node* properties = nullptr,
+                                 compiler::Node* elements = nullptr);
+
+  void InitializeJSObjectBody(compiler::Node* object, compiler::Node* map,
+                              compiler::Node* size,
+                              int start_offset = JSObject::kHeaderSize);
+
   // Allocate a JSArray without elements and initialize the header fields.
   compiler::Node* AllocateUninitializedJSArrayWithoutElements(
       ElementsKind kind, compiler::Node* array_map, compiler::Node* length,