Visit the Optimized Code Map on first call rather than closure creation.

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index a442ccc662cfc2dd93059e81d3718eef8a81b9f6..c1e08a2d78eb1faa8073860e1484534f3071fb2f 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -6694,6 +6694,18 @@ class SharedFunctionInfo: public HeapObject {
 
   static const int kNotFound = -1;
 
+  // Helpers for assembly code that does a backwards walk of the optimized code
+  // map.
+  static const int kOffsetToPreviousContext =
+      FixedArray::kHeaderSize + kPointerSize * (kContextOffset - kEntryLength);
+  static const int kOffsetToPreviousCachedCode =
+      FixedArray::kHeaderSize +
+      kPointerSize * (kCachedCodeOffset - kEntryLength);
+  static const int kOffsetToPreviousLiterals =
+      FixedArray::kHeaderSize + kPointerSize * (kLiteralsOffset - kEntryLength);
+  static const int kOffsetToPreviousOsrAstId =
+      FixedArray::kHeaderSize + kPointerSize * (kOsrAstIdOffset - kEntryLength);
+
   // [scope_info]: Scope info.
   DECL_ACCESSORS(scope_info, ScopeInfo)