Simplify HeapSlot to make it trivially copyable

This removes the constructors, which were never called since we allocate arrays of HeapSlot with pod_malloc. The destructor is only ever called explicitly since we free this memory with js_free so it has been renamed to destroy(). Also removed is an unused manual barrier.

1 files changed, 4 insertions, 6 deletions

diff --git a/js/src/vm/NativeObject.h b/js/src/vm/NativeObject.h
index f4199b4cf6..4dbc167ab6 100644
--- a/js/src/vm/NativeObject.h
+++ b/js/src/vm/NativeObject.h
@@ -876,7 +876,7 @@ class NativeObject : public ShapedObject
         MOZ_ASSERT(end <= getDenseInitializedLength());
         MOZ_ASSERT(!denseElementsAreCopyOnWrite());
         for (size_t i = start; i < end; i++)
-            elements_[i].HeapSlot::~HeapSlot();
+            elements_[i].destroy();
     }
 
     /*
@@ -885,7 +885,7 @@ class NativeObject : public ShapedObject
      */
     void prepareSlotRangeForOverwrite(size_t start, size_t end) {
         for (size_t i = start; i < end; i++)
-            getSlotAddressUnchecked(i)->HeapSlot::~HeapSlot();
+            getSlotAddressUnchecked(i)->destroy();
     }
 
   public:
@@ -1130,8 +1130,7 @@ class NativeObject : public ShapedObject
                     dst->set(this, HeapSlot::Element, dst - elements_, *src);
             }
         } else {
-            memmove(reinterpret_cast<Value*>(elements_ + dstStart), elements_ + srcStart,
-                    count * sizeof(Value));
+            memmove(elements_ + dstStart, elements_ + srcStart, count * sizeof(HeapSlot));
             elementsRangeWriteBarrierPost(dstStart, count);
         }
     }
@@ -1144,8 +1143,7 @@ class NativeObject : public ShapedObject
         MOZ_ASSERT(!denseElementsAreCopyOnWrite());
         MOZ_ASSERT(!denseElementsAreFrozen());
 
-        memmove(reinterpret_cast<Value*>(elements_ + dstStart), elements_ + srcStart,
-                count * sizeof(Value));
+        memmove(elements_ + dstStart, elements_ + srcStart, count * sizeof(HeapSlot));
         elementsRangeWriteBarrierPost(dstStart, count);
     }