[strong] Disallow implicit conversions for comparison

src/hydrogen.cc

 // Copyright 2013 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 "src/hydrogen.h"
 
 #include <sstream>
 
 #include "src/v8.h"
 
@@ skipping 11191 matching lines @@
   } else if (combined_type->Is(Type::String())) {
     BuildCheckHeapObject(left);
     Add<HCheckInstanceType>(left, HCheckInstanceType::IS_STRING);
     BuildCheckHeapObject(right);
     Add<HCheckInstanceType>(right, HCheckInstanceType::IS_STRING);
     HStringCompareAndBranch* result =
         New<HStringCompareAndBranch>(left, right, op);
     return result;
   } else {
     if (combined_rep.IsTagged() || combined_rep.IsNone()) {
-      HCompareGeneric* result = Add<HCompareGeneric>(left, right, op);
+      HCompareGeneric* result =
+          Add<HCompareGeneric>(left, right, op, function_language_mode());
       result->set_observed_input_representation(1, left_rep);
       result->set_observed_input_representation(2, right_rep);
       if (result->HasObservableSideEffects()) {
         if (push_sim_result == PUSH_BEFORE_SIMULATE) {
           Push(result);
           AddSimulate(bailout_id, REMOVABLE_SIMULATE);
           Drop(1);
         } else {
           AddSimulate(bailout_id, REMOVABLE_SIMULATE);
         }
@@ skipping 1929 matching lines @@
   if (ShouldProduceTraceOutput()) {
     isolate()->GetHTracer()->TraceHydrogen(name(), graph_);
   }
 
 #ifdef DEBUG
   graph_->Verify(false);  // No full verify.
 #endif
 }
 
 } }  // namespace v8::internal