Drop obsolete HCheckMaps::HandleSideEffectsDominator().

src/hydrogen-instructions.cc

 // 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.
 
 #include "v8.h"
 
 #include "double.h"
 #include "factory.h"
 #include "hydrogen-infer-representation.h"
 #include "property-details-inl.h"
@@ skipping 1651 matching lines @@
     case IS_INTERNALIZED_STRING:
       *mask = kIsNotStringMask | kIsNotInternalizedMask;
       *tag = kInternalizedTag;
       return;
     default:
       UNREACHABLE();
   }
 }
 
 
-bool HCheckMaps::HandleSideEffectDominator(GVNFlag side_effect,
-                                           HValue* dominator) {
-  ASSERT(side_effect == kMaps);
-  // TODO(mstarzinger): For now we specialize on HStoreNamedField, but once
-  // type information is rich enough we should generalize this to any HType
-  // for which the map is known.
-  if (HasNoUses() && dominator->IsStoreNamedField()) {
-    HStoreNamedField* store = HStoreNamedField::cast(dominator);
-    if (!store->has_transition() || store->object() != value()) return false;
-    HConstant* transition = HConstant::cast(store->transition());
-    if (map_set_.Contains(Unique<Map>::cast(transition->GetUnique()))) {
-      DeleteAndReplaceWith(NULL);
-      return true;
-    }
-  }
-  return false;
-}
-
-
 void HCheckMaps::PrintDataTo(StringStream* stream) {
   value()->PrintNameTo(stream);
   stream->Add(" [%p", *map_set_.at(0).handle());
   for (int i = 1; i < map_set_.size(); ++i) {
     stream->Add(",%p", *map_set_.at(i).handle());
   }
   stream->Add("]%s", CanOmitMapChecks() ? "(omitted)" : "");
 }
 
 
@@ skipping 3063 matching lines @@
       break;
     case kExternalMemory:
       stream->Add("[external-memory]");
       break;
   }
 
   stream->Add("@%d", offset());
 }
 
 } }  // namespace v8::internal