Reland [heap] Avoid the use of cells to point from code to new-space objects.

src/heap/remembered-set.cc

Index: src/heap/remembered-set.cc
diff --git a/src/heap/remembered-set.cc b/src/heap/remembered-set.cc
index 0bc5e6e32401de0e4566cf81e37e9d23ab67ab04..6e27c288cf69cafae6fb7a0a06f5b23ee2ecad1e 100644
--- a/src/heap/remembered-set.cc
+++ b/src/heap/remembered-set.cc
@@ -9,6 +9,7 @@
 #include "src/heap/slot-set.h"
 #include "src/heap/spaces.h"
 #include "src/heap/store-buffer.h"
+#include "src/macro-assembler.h"
 
 namespace v8 {
 namespace internal {
@@ -25,6 +26,19 @@ void RememberedSet<direction>::ClearInvalidSlots(Heap* heap) {
       });
     }
   }
+  for (MemoryChunk* chunk : *heap->code_space()) {
+    TypedSlotSet* slots = GetTypedSlotSet(chunk);
+    if (slots != nullptr) {
+      slots->Iterate(
+          [heap, chunk](SlotType type, Address host_addr, Address addr) {
+            if (Marking::IsBlack(Marking::MarkBitFrom(host_addr))) {
+              return KEEP_SLOT;
+            } else {
+              return REMOVE_SLOT;
+            }
+          });
+    }
+  }
 }
 
 template <PointerDirection direction>