Fix assert triggered by constant folding.

src/hydrogen.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 1519 matching lines @@
 }
 
 
 HLoadNamedField* HGraphBuilder::AddLoadFixedArrayLength(HValue* object) {
   return Add<HLoadNamedField>(object,
                               HObjectAccess::ForFixedArrayLength());
 }
 
 
 HValue* HGraphBuilder::BuildNewElementsCapacity(HValue* old_capacity) {
-  HValue* half_old_capacity = Add<HShr>(old_capacity, graph_->GetConstant1());
+  HValue* half_old_capacity = AddUncasted<HShr>(old_capacity,
+                                                graph_->GetConstant1());
 
-  HValue* new_capacity = Add<HAdd>(half_old_capacity, old_capacity);
+  HValue* new_capacity = AddUncasted<HAdd>(half_old_capacity, old_capacity);
   new_capacity->ClearFlag(HValue::kCanOverflow);
 
   HValue* min_growth = Add<HConstant>(16);
 
-  new_capacity = Add<HAdd>(new_capacity, min_growth);
+  new_capacity = AddUncasted<HAdd>(new_capacity, min_growth);
   new_capacity->ClearFlag(HValue::kCanOverflow);
 
   return new_capacity;
 }
 
 
 void HGraphBuilder::BuildNewSpaceArrayCheck(HValue* length, ElementsKind kind) {
   Heap* heap = isolate()->heap();
   int element_size = IsFastDoubleElementsKind(kind) ? kDoubleSize
                                                     : kPointerSize;
@@ skipping 8325 matching lines @@
   if (ShouldProduceTraceOutput()) {
     isolate()->GetHTracer()->TraceHydrogen(name(), graph_);
   }
 
 #ifdef DEBUG
   graph_->Verify(false);  // No full verify.
 #endif
 }
 
 } }  // namespace v8::internal