Revert of [TypeFeedbackVector] Root literal arrays in function literals slots

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index 7cbc0f4593dacb1e5fc450ca50c0174619b48dc4..c0085e3773f7f6b7f55564b1042f61ed43bdcb32 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -4997,11 +4997,8 @@
     return OffsetOfElementAt(index + kFirstLiteralIndex);
   }
 
-  // Returns true if the vector isn't yet installed.
-  inline bool needs_feedback_vector() const;
   inline TypeFeedbackVector* feedback_vector() const;
   inline void set_feedback_vector(TypeFeedbackVector* vector);
-
   inline Object* literal(int literal_index) const;
   inline void set_literal(int literal_index, Object* literal);
   inline void set_literal_undefined(int literal_index);
@@ -7128,6 +7125,14 @@
 };
 
 
+// Result of searching in an optimized code map of a SharedFunctionInfo. Note
+// that both {code} and {literals} can be NULL to pass search result status.
+struct CodeAndLiterals {
+  Code* code;            // Cached optimized code.
+  LiteralsArray* literals;  // Cached literals array.
+};
+
+
 // SharedFunctionInfo describes the JSFunction information that can be
 // shared by multiple instances of the function.
 class SharedFunctionInfo: public HeapObject {
@@ -7158,7 +7163,11 @@
   DECL_ACCESSORS(optimized_code_map, FixedArray)
 
   // Returns entry from optimized code map for specified context and OSR entry.
-  Code* SearchOptimizedCodeMap(Context* native_context, BailoutId osr_ast_id);
+  // Note that {code == nullptr, literals == nullptr} indicates no matching
+  // entry has been found, whereas {code, literals == nullptr} indicates that
+  // code is context-independent.
+  CodeAndLiterals SearchOptimizedCodeMap(Context* native_context,
+                                         BailoutId osr_ast_id);
 
   // Clear optimized code map.
   void ClearOptimizedCodeMap();
@@ -7184,6 +7193,7 @@
   static void AddToOptimizedCodeMap(Handle<SharedFunctionInfo> shared,
                                     Handle<Context> native_context,
                                     MaybeHandle<Code> code,
+                                    Handle<LiteralsArray> literals,
                                     BailoutId osr_ast_id);
 
   // Set up the link between shared function info and the script. The shared
@@ -7195,7 +7205,8 @@
   static const int kEntriesStart = 0;
   static const int kContextOffset = 0;
   static const int kCachedCodeOffset = 1;
-  static const int kEntryLength = 2;
+  static const int kLiteralsOffset = 2;
+  static const int kEntryLength = 3;
   static const int kInitialLength = kEntriesStart + kEntryLength;
 
   static const int kNotFound = -1;
@@ -7207,6 +7218,8 @@
   static const int kOffsetToPreviousCachedCode =
       FixedArray::kHeaderSize +
       kPointerSize * (kCachedCodeOffset - kEntryLength);
+  static const int kOffsetToPreviousLiterals =
+      FixedArray::kHeaderSize + kPointerSize * (kLiteralsOffset - kEntryLength);
 
   // [scope_info]: Scope info.
   DECL_ACCESSORS(scope_info, ScopeInfo)
@@ -8353,8 +8366,6 @@
   static const int kSize = kNextFunctionLinkOffset + kPointerSize;
 
  private:
-  inline bool needs_literals_array() const;
-
   DISALLOW_IMPLICIT_CONSTRUCTORS(JSFunction);
 };