Port FastCloneShallowArrayStub to Turbofan

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 54 matching lines @@
     return value;
   }
 
   compiler::Node* TagParameter(compiler::Node* value, ParameterMode mode) {
     if (mode != SMI_PARAMETERS) value = SmiTag(value);
     return value;
   }
 
   compiler::Node* BooleanMapConstant();
   compiler::Node* EmptyStringConstant();
+  compiler::Node* FixedArrayMapConstant();
+  compiler::Node* FixedCowArrayMapConstant();
   compiler::Node* HeapNumberMapConstant();
   compiler::Node* NoContextConstant();
   compiler::Node* NanConstant();
   compiler::Node* NullConstant();
   compiler::Node* MinusZeroConstant();
   compiler::Node* UndefinedConstant();
   compiler::Node* TheHoleConstant();
   compiler::Node* HashSeed();
   compiler::Node* StaleRegisterConstant();
 
@@ skipping 118 matching lines @@
   // 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);
   // 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);
@@ skipping 87 matching lines @@
   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.
   compiler::Node* AllocateSeqTwoByteString(int length);
   compiler::Node* AllocateSeqTwoByteString(compiler::Node* context,
                                            compiler::Node* length);
-  // Allocated an JSArray
-  compiler::Node* AllocateJSArray(ElementsKind kind, compiler::Node* array_map,
-                                  compiler::Node* capacity,
-                                  compiler::Node* length,
-                                  compiler::Node* allocation_site = nullptr,
-                                  ParameterMode mode = INTEGER_PARAMETERS);
+  // Allocate a JSArray and its elements if capacity is not null.
+  // Also initializes JSArray header fields.
+  compiler::Node* AllocateEmptyJSArray(
+      ElementsKind kind, compiler::Node* array_map, compiler::Node* length,
+      compiler::Node* allocation_site = nullptr,
+      ParameterMode mode = INTEGER_PARAMETERS,
+      compiler::Node* capacity = nullptr);
+  // Allocate a JSArray and fill elements with zero.
+  compiler::Node* AllocateFilledJSArray(
+      ElementsKind kind, compiler::Node* array_map, compiler::Node* capacity,
+      compiler::Node* length, compiler::Node* allocation_site = nullptr,
+      ParameterMode mode = INTEGER_PARAMETERS);
 
   compiler::Node* AllocateFixedArray(ElementsKind kind,
                                      compiler::Node* capacity,
                                      ParameterMode mode = INTEGER_PARAMETERS,
                                      AllocationFlags flags = kNone);
 
   void FillFixedArrayWithValue(ElementsKind kind, compiler::Node* array,
                                compiler::Node* from_index,
                                compiler::Node* to_index,
                                Heap::RootListIndex value_root_index,
@@ skipping 398 matching lines @@
                                            Label* bailout);
 
   static const int kElementLoopUnrollThreshold = 8;
 };
 
 DEFINE_OPERATORS_FOR_FLAGS(CodeStubAssembler::AllocationFlags);
 
 }  // namespace internal
 }  // namespace v8
 #endif  // V8_CODE_STUB_ASSEMBLER_H_