Out-of-line constant pool on Arm: Stage 2 - Introduce ConstantPoolArray object.

src/heap.h

Index: src/heap.h
diff --git a/src/heap.h b/src/heap.h
index f5b99d6e53dd28d794baac7b99807eeb90d8fb08..52d932f54b4465ae01d297e8db8f9139dfbf76fd 100644
--- a/src/heap.h
+++ b/src/heap.h
@@ -71,6 +71,7 @@ namespace internal {
   V(Map, scope_info_map, ScopeInfoMap)                                         \
   V(Map, fixed_cow_array_map, FixedCOWArrayMap)                                \
   V(Map, fixed_double_array_map, FixedDoubleArrayMap)                          \
+  V(Map, constant_pool_array_map, ConstantPoolArrayMap)                        \
   V(Object, no_interceptor_result_sentinel, NoInterceptorResultSentinel)       \
   V(Map, hash_table_map, HashTableMap)                                         \
   V(FixedArray, empty_fixed_array, EmptyFixedArray)                            \
@@ -943,6 +944,16 @@ class Heap {
   MUST_USE_RESULT MaybeObject* CopyFixedDoubleArrayWithMap(
       FixedDoubleArray* src, Map* map);
 
+  // Make a copy of src and return it. Returns
+  // Failure::RetryAfterGC(requested_bytes, space) if the allocation failed.
+  MUST_USE_RESULT inline MaybeObject* CopyConstantPoolArray(
+      ConstantPoolArray* src);
+
+  // Make a copy of src, set the map, and return the copy. Returns
+  // Failure::RetryAfterGC(requested_bytes, space) if the allocation failed.
+  MUST_USE_RESULT MaybeObject* CopyConstantPoolArrayWithMap(
+      ConstantPoolArray* src, Map* map);
+
   // Allocates a fixed array initialized with the hole values.
   // Returns Failure::RetryAfterGC(requested_bytes, space) if the allocation
   // failed.
@@ -951,6 +962,11 @@ class Heap {
       int length,
       PretenureFlag pretenure = NOT_TENURED);
 
+  MUST_USE_RESULT MaybeObject* AllocateConstantPoolArray(
+      int first_int64_index,
+      int first_ptr_index,
+      int first_int32_index);
+
   // Allocates a fixed double array with uninitialized values. Returns
   // Failure::RetryAfterGC(requested_bytes, space) if the allocation failed.
   // Please note this does not perform a garbage collection.