Fix optimistic BCE to back off after deopt

src/hydrogen-bce.cc

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 357 matching lines @@
                                                    check,
                                                    bb_data_list,
                                                    NULL);
       *data_p = bb_data_list;
     } else if (data->OffsetIsCovered(offset)) {
       bb->graph()->isolate()->counters()->
           bounds_checks_eliminated()->Increment();
       check->DeleteAndReplaceWith(check->ActualValue());
     } else if (data->BasicBlock() == bb) {
       data->CoverCheck(check, offset);
-    } else {
+    } else if (graph()->use_optimistic_licm() ||
+               bb->IsLoopSuccessorDominator()) {
       int32_t new_lower_offset = offset < data->LowerOffset()
           ? offset
           : data->LowerOffset();
       int32_t new_upper_offset = offset > data->UpperOffset()
           ? offset
           : data->UpperOffset();
       bb_data_list = new(zone()) BoundsCheckBbData(key,
                                                    new_lower_offset,
                                                    new_upper_offset,
                                                    bb,
@@ skipping 15 matching lines @@
     if (data->FatherInDominatorTree()) {
       table_.Insert(data->Key(), data->FatherInDominatorTree(), zone());
     } else {
       table_.Delete(data->Key());
     }
     data = data->NextInBasicBlock();
   }
 }
 
 } }  // namespace v8::internal