Mark HChange that convert to int32 with truncation with the appropiate flag....

src/hydrogen.cc

 // Copyright 2011 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 1645 matching lines @@
       PropagateMinusZeroChecks(div->right(), visited);
     }
 
     current = current->EnsureAndPropagateNotMinusZero(visited);
   }
 }
 
 
 void HGraph::InsertRepresentationChangeForUse(HValue* value,
                                               HValue* use,
-                                              Representation to,
-                                              bool is_truncating) {
+                                              Representation to) {
   // Insert the representation change right before its use. For phi-uses we
   // insert at the end of the corresponding predecessor.
   HInstruction* next = NULL;
   if (use->IsPhi()) {
     int index = 0;
     while (use->OperandAt(index) != value) ++index;
     next = use->block()->predecessors()->at(index)->end();
   } else {
     next = HInstruction::cast(use);
   }
 
   // For constants we try to make the representation change at compile
   // time. When a representation change is not possible without loss of
   // information we treat constants like normal instructions and insert the
   // change instructions for them.
   HInstruction* new_value = NULL;
+  bool is_truncating = use->CheckFlag(HValue::kTruncatingToInt32);
   if (value->IsConstant()) {
     HConstant* constant = HConstant::cast(value);
     // Try to create a new copy of the constant with the new representation.
     new_value = is_truncating
         ? constant->CopyToTruncatedInt32()
         : constant->CopyToRepresentation(to);
   }
 
   if (new_value == NULL) {
-    new_value = new HChange(value, value->representation(), to);
+    new_value = new HChange(value, value->representation(), to, is_truncating);
   }
 
   new_value->InsertBefore(next);
   value->ReplaceFirstAtUse(use, new_value, to);
 }
 
 
 int CompareConversionUses(HValue* a,
                           HValue* b,
                           Representation a_rep,
@@ skipping 54 matching lines @@
              current->id(),
              use->id());
     }
     to_convert.InsertAt(index, use);
     to_convert_reps.InsertAt(index, req);
   }
 
   for (int i = 0; i < to_convert.length(); ++i) {
     HValue* use = to_convert[i];
     Representation r_to = to_convert_reps[i];
-    bool is_truncating = use->CheckFlag(HValue::kTruncatingToInt32);
-    InsertRepresentationChangeForUse(current, use, r_to, is_truncating);
+    InsertRepresentationChangeForUse(current, use, r_to);
   }
 
   if (current->uses()->is_empty()) {
     ASSERT(current->IsConstant());
     current->Delete();
   }
 }
 
 
 void HGraph::InsertRepresentationChanges() {
@@ skipping 4227 matching lines @@
     }
   }
 
 #ifdef DEBUG
   if (graph_ != NULL) graph_->Verify();
   if (allocator_ != NULL) allocator_->Verify();
 #endif
 }
 
 } }  // namespace v8::internal