[stubs] Port FastNewObjectStub to TF

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 294 matching lines @@
   Node* LoadAndUntagToWord32Root(Heap::RootListIndex root_index);
 
   // Load the floating point value of a HeapNumber.
   Node* LoadHeapNumberValue(Node* object);
   // Load the Map of an HeapObject.
   Node* LoadMap(Node* object);
   // Load the instance type of an HeapObject.
   Node* LoadInstanceType(Node* object);
   // Compare the instance the type of the object against the provided one.
   Node* HasInstanceType(Node* object, InstanceType type);
+  Node* DoesntHaveInstanceType(Node* object, InstanceType type);
   // Load the properties backing store of a JSObject.
   Node* LoadProperties(Node* object);
   // Load the elements backing store of a JSObject.
   Node* LoadElements(Node* object);
   // Load the length of a JSArray instance.
   Node* LoadJSArrayLength(Node* array);
   // Load the length of a fixed array base instance.
   Node* LoadFixedArrayBaseLength(Node* array);
   // Load the length of a fixed array base instance.
   Node* LoadAndUntagFixedArrayBaseLength(Node* array);
@@ skipping 447 matching lines @@
   template <typename T>
   Node* IsSetWord(Node* word) {
     return IsSetWord(word, T::kMask);
   }
 
   // Returns true if any of the mask's bits in given |word| are set.
   Node* IsSetWord(Node* word, uint32_t mask) {
     return WordNotEqual(WordAnd(word, IntPtrConstant(mask)), IntPtrConstant(0));
   }
 
+  // Returns true if all of the |T|'s bits in given |word32| are clear.
+  template <typename T>
+  Node* IsClearWord32(Node* word32) {
+    return IsClearWord32(word32, T::kMask);
+  }
+
+  // Returns true if all of the mask's bits in given |word32| are clear.
+  Node* IsClearWord32(Node* word32, uint32_t mask) {
+    return Word32Equal(Word32And(word32, Int32Constant(mask)),
+                       Int32Constant(0));
+  }
+
+  // Returns true if all of the |T|'s bits in given |word| are clear.
+  template <typename T>
+  Node* IsClearWord(Node* word) {
+    return IsClearWord(word, T::kMask);
+  }
+
+  // Returns true if all of the mask's bits in given |word| are clear.
+  Node* IsClearWord(Node* word, uint32_t mask) {
+    return WordEqual(WordAnd(word, IntPtrConstant(mask)), IntPtrConstant(0));
+  }
+
   void SetCounter(StatsCounter* counter, int value);
   void IncrementCounter(StatsCounter* counter, int delta);
   void DecrementCounter(StatsCounter* counter, int delta);
 
   void Increment(Variable& variable, int value = 1,
                  ParameterMode mode = INTPTR_PARAMETERS);
 
   // Generates "if (false) goto label" code. Useful for marking a label as
   // "live" to avoid assertion failures during graph building. In the resulting
   // code this check will be eliminated.
@@ skipping 246 matching lines @@
                                ParameterMode mode, int header_size) {
     return ElementOffsetFromIndex(element_count, kind, mode, header_size);
   }
 
   Node* GetFixedArrayAllocationSize(Node* element_count, ElementsKind kind,
                                     ParameterMode mode) {
     return GetArrayAllocationSize(element_count, kind, mode,
                                   FixedArray::kHeaderSize);
   }
 
+  void InitializeFieldsWithRoot(Node* object, Node* start_offset,
+                                Node* end_offset, Heap::RootListIndex root);
+
   enum RelationalComparisonMode {
     kLessThan,
     kLessThanOrEqual,
     kGreaterThan,
     kGreaterThanOrEqual
   };
 
   Node* RelationalComparison(RelationalComparisonMode mode, Node* lhs,
                              Node* rhs, Node* context);
 
@@ skipping 156 matching lines @@
   }
 #else
 #define CSA_SLOW_ASSERT(csa, x) ((void)0)
 #endif
 
 DEFINE_OPERATORS_FOR_FLAGS(CodeStubAssembler::AllocationFlags);
 
 }  // namespace internal
 }  // namespace v8
 #endif  // V8_CODE_STUB_ASSEMBLER_H_