[stubs] Implement fast TF Builtin for Object.create

src/code-stub-assembler.h

 // Copyright 2016 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_CODE_STUB_ASSEMBLER_H_
 #define V8_CODE_STUB_ASSEMBLER_H_
 
 #include <functional>
 
 #include "src/compiler/code-assembler.h"
@@ skipping 170 matching lines @@
 
   void BranchIfSimd128Equal(compiler::Node* lhs, compiler::Node* lhs_map,
                             compiler::Node* rhs, compiler::Node* rhs_map,
                             Label* if_equal, Label* if_notequal);
   void BranchIfSimd128Equal(compiler::Node* lhs, compiler::Node* rhs,
                             Label* if_equal, Label* if_notequal) {
     BranchIfSimd128Equal(lhs, LoadMap(lhs), rhs, LoadMap(rhs), if_equal,
                          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);
 
   // Load value from current frame by given offset in bytes.
   compiler::Node* LoadFromFrame(int offset,
                                 MachineType rep = MachineType::AnyTagged());
   // Load value from current parent frame by given offset in bytes.
   compiler::Node* LoadFromParentFrame(
       int offset, MachineType rep = MachineType::AnyTagged());
 
@@ skipping 15 matching lines @@
   compiler::Node* LoadAndUntagSmi(compiler::Node* base, int index);
   // Load a SMI root, untag it, and convert to Word32.
   compiler::Node* LoadAndUntagToWord32Root(Heap::RootListIndex root_index);
 
   // Load the floating point value of a HeapNumber.
   compiler::Node* LoadHeapNumberValue(compiler::Node* object);
   // Load the Map of an HeapObject.
   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.
   compiler::Node* LoadProperties(compiler::Node* object);
   // Load the elements backing store of a JSObject.
   compiler::Node* LoadElements(compiler::Node* object);
   // Load the length of a JSArray instance.
   compiler::Node* LoadJSArrayLength(compiler::Node* array);
   // Load the length of a fixed array base instance.
   compiler::Node* LoadFixedArrayBaseLength(compiler::Node* array);
   // Load the length of a fixed array base instance.
   compiler::Node* LoadAndUntagFixedArrayBaseLength(compiler::Node* array);
   // Load the bit field of a Map.
   compiler::Node* LoadMapBitField(compiler::Node* map);
   // Load bit field 2 of a map.
   compiler::Node* LoadMapBitField2(compiler::Node* map);
   // Load bit field 3 of a map.
   compiler::Node* LoadMapBitField3(compiler::Node* map);
   // Load the instance type of a map.
   compiler::Node* LoadMapInstanceType(compiler::Node* map);
   // Load the ElementsKind of a map.
   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).
   compiler::Node* LoadMapInobjectProperties(compiler::Node* map);
   // Load the constructor function index of a Map (only for primitive maps).
   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);
   // Load the hash value of a name as an uint32 value.
   // If {if_hash_not_computed} label is specified then it also checks if
   // hash is actually computed.
   compiler::Node* LoadNameHash(compiler::Node* name,
                                Label* if_hash_not_computed = nullptr);
 
   // Load length field of a String object.
@@ skipping 58 matching lines @@
   // Store an array element to a FixedArray.
   compiler::Node* StoreFixedArrayElement(
       compiler::Node* object, compiler::Node* index, compiler::Node* value,
       WriteBarrierMode barrier_mode = UPDATE_WRITE_BARRIER,
       ParameterMode parameter_mode = INTEGER_PARAMETERS);
 
   compiler::Node* StoreFixedDoubleArrayElement(
       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.
   compiler::Node* AllocateHeapNumberWithValue(compiler::Node* value,
                                               MutableMode mode = IMMUTABLE);
   // Allocate a SeqOneByteString with the given length.
   compiler::Node* AllocateSeqOneByteString(int length);
   compiler::Node* AllocateSeqOneByteString(compiler::Node* context,
                                            compiler::Node* length);
   // Allocate a SeqTwoByteString with the given length.
@@ skipping 27 matching lines @@
 
   // Allocate a RegExpResult with the given length (the number of captures,
   // including the match itself), index (the index where the match starts),
   // and input string. |length| and |index| are expected to be tagged, and
   // |input| must be a string.
   compiler::Node* AllocateRegExpResult(compiler::Node* context,
                                        compiler::Node* length,
                                        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,
       compiler::Node* allocation_site);
   // Allocate and return a JSArray with initialized header fields and its
   // uninitialized elements.
   // The ParameterMode argument is only used for the capacity parameter.
   std::pair<compiler::Node*, compiler::Node*>
   AllocateUninitializedJSArrayWithElements(
       ElementsKind kind, compiler::Node* array_map, compiler::Node* length,
@@ skipping 595 matching lines @@
   static const int kElementLoopUnrollThreshold = 8;
 };
 
 #define CSA_ASSERT(x) Assert((x), #x, __FILE__, __LINE__)
 
 DEFINE_OPERATORS_FOR_FLAGS(CodeStubAssembler::AllocationFlags);
 
 }  // namespace internal
 }  // namespace v8
 #endif  // V8_CODE_STUB_ASSEMBLER_H_