Vector ICs: Introduce an InstanceType for the type feedback vector.

src/heap/heap.h

Index: src/heap/heap.h
diff --git a/src/heap/heap.h b/src/heap/heap.h
index a57a46d85edd6c351bc66be96d192271b6be3578..02174e0cee7c18fecc94933d0b6aad00aa0b5ef2 100644
--- a/src/heap/heap.h
+++ b/src/heap/heap.h
@@ -53,11 +53,13 @@ namespace internal {
   V(Map, scope_info_map, ScopeInfoMap)                                         \
   V(Map, fixed_cow_array_map, FixedCOWArrayMap)                                \
   V(Map, fixed_double_array_map, FixedDoubleArrayMap)                          \
+  V(Map, feedback_vector_map, FeedbackVectorMap)                               \
   V(Map, weak_cell_map, WeakCellMap)                                           \
   V(Map, one_byte_string_map, OneByteStringMap)                                \
   V(Map, one_byte_internalized_string_map, OneByteInternalizedStringMap)       \
   V(Map, function_context_map, FunctionContextMap)                             \
   V(FixedArray, empty_fixed_array, EmptyFixedArray)                            \
+  V(Object, empty_feedback_vector, EmptyFeedbackVector)                        \
   V(ByteArray, empty_byte_array, EmptyByteArray)                               \
   V(DescriptorArray, empty_descriptor_array, EmptyDescriptorArray)             \
   /* The roots above this line should be boring from a GC point of view.    */ \
@@ -564,6 +566,7 @@ enum ArrayStorageAllocationMode {
 };
 
 
+class FeedbackVectorSpec;
 class Heap {
  public:
   // Configure heap size in MB before setup. Return false if the heap has been
@@ -2008,6 +2011,11 @@ class Heap {
   MUST_USE_RESULT inline AllocationResult CopyFixedDoubleArray(
       FixedDoubleArray* src);
 
+  MUST_USE_RESULT inline AllocationResult CopyTypeFeedbackVector(
+      TypeFeedbackVector* src);
+  MUST_USE_RESULT AllocationResult
+  CopyTypeFeedbackVectorWithMap(TypeFeedbackVector* src, Map* map);
+
   // Computes a single character string where the character has code.
   // A cache is used for one-byte (Latin1) codes.
   MUST_USE_RESULT AllocationResult
@@ -2016,6 +2024,9 @@ class Heap {
   // Allocate a symbol in old space.
   MUST_USE_RESULT AllocationResult AllocateSymbol();
 
+  template <typename Spec>
+  MUST_USE_RESULT AllocationResult AllocateTypeFeedbackVector(const Spec* spec);
+
   // Allocates an external array of the specified length and type.
   MUST_USE_RESULT AllocationResult
       AllocateExternalArray(int length, ExternalArrayType array_type,
@@ -2047,6 +2058,9 @@ class Heap {
   // Allocate empty fixed array.
   MUST_USE_RESULT AllocationResult AllocateEmptyFixedArray();
 
+  // Allocate empty feedback vector.
+  MUST_USE_RESULT AllocationResult AllocateEmptyFeedbackVector();
+
   // Allocate empty external array of given type.
   MUST_USE_RESULT AllocationResult
       AllocateEmptyExternalArray(ExternalArrayType array_type);