Remove custom weak handling of monomorphic IC.

src/objects-inl.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 //
 // Review notes:
 //
 // - The use of macros in these inline functions may seem superfluous
 // but it is absolutely needed to make sure gcc generates optimal
 // code. gcc is not happy when attempting to inline too deep.
 //
@@ skipping 5050 matching lines @@
 
 void Code::set_marked_for_deoptimization(bool flag) {
   DCHECK(kind() == OPTIMIZED_FUNCTION);
   DCHECK(!flag || AllowDeoptimization::IsAllowed(GetIsolate()));
   int previous = READ_UINT32_FIELD(this, kKindSpecificFlags1Offset);
   int updated = MarkedForDeoptimizationField::update(previous, flag);
   WRITE_UINT32_FIELD(this, kKindSpecificFlags1Offset, updated);
 }
 
 
-bool Code::is_weak_stub() {
-  return CanBeWeakStub() && WeakStubField::decode(
-      READ_UINT32_FIELD(this, kKindSpecificFlags1Offset));
-}
-
-
-void Code::mark_as_weak_stub() {
-  DCHECK(CanBeWeakStub());
-  int previous = READ_UINT32_FIELD(this, kKindSpecificFlags1Offset);
-  int updated = WeakStubField::update(previous, true);
-  WRITE_UINT32_FIELD(this, kKindSpecificFlags1Offset, updated);
-}
-
-
-bool Code::is_invalidated_weak_stub() {
-  return is_weak_stub() && InvalidatedWeakStubField::decode(
-      READ_UINT32_FIELD(this, kKindSpecificFlags1Offset));
-}
-
-
-void Code::mark_as_invalidated_weak_stub() {
-  DCHECK(is_inline_cache_stub());
-  int previous = READ_UINT32_FIELD(this, kKindSpecificFlags1Offset);
-  int updated = InvalidatedWeakStubField::update(previous, true);
-  WRITE_UINT32_FIELD(this, kKindSpecificFlags1Offset, updated);
-}
-
-
 bool Code::is_inline_cache_stub() {
   Kind kind = this->kind();
   switch (kind) {
 #define CASE(name) case name: return true;
     IC_KIND_LIST(CASE)
 #undef CASE
     default: return false;
   }
 }
 
@@ skipping 126 matching lines @@
   }
  private:
   static const int kMaxCount = 4;
   int count_;
   Handle<Map> find_[kMaxCount];
   Handle<Object> replace_[kMaxCount];
   friend class Code;
 };
 
 
-bool Code::IsWeakObjectInIC(Object* object) {
-  return object->IsMap() && Map::cast(object)->CanTransition() &&
-         FLAG_collect_maps &&
-         FLAG_weak_embedded_maps_in_ic;
-}
-
-
 Object* Map::prototype() const {
   return READ_FIELD(this, kPrototypeOffset);
 }
 
 
 void Map::set_prototype(Object* value, WriteBarrierMode mode) {
   DCHECK(value->IsNull() || value->IsJSReceiver());
   WRITE_FIELD(this, kPrototypeOffset, value);
   CONDITIONAL_WRITE_BARRIER(GetHeap(), this, kPrototypeOffset, value, mode);
 }
@@ skipping 2291 matching lines @@
 #undef READ_SHORT_FIELD
 #undef WRITE_SHORT_FIELD
 #undef READ_BYTE_FIELD
 #undef WRITE_BYTE_FIELD
 #undef NOBARRIER_READ_BYTE_FIELD
 #undef NOBARRIER_WRITE_BYTE_FIELD
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_INL_H_