Add smi support to all binops minus shr, sar, shl, div and mod.

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 1862 matching lines @@
 HValue* HGraphBuilder::JSArrayBuilder::EstablishAllocationSize(
     HValue* length_node) {
   HValue* context = builder()->environment()->LookupContext();
   ASSERT(length_node != NULL);
 
   int base_size = JSArray::kSize;
   if (mode_ == TRACK_ALLOCATION_SITE) {
     base_size += AllocationMemento::kSize;
   }
 
-  if (IsFastDoubleElementsKind(kind_)) {
-    base_size += FixedDoubleArray::kHeaderSize;
-  } else {
-    base_size += FixedArray::kHeaderSize;
-  }
+  STATIC_ASSERT(FixedDoubleArray::kHeaderSize == FixedArray::kHeaderSize);
+  base_size += FixedArray::kHeaderSize;
 
   HInstruction* elements_size_value =
       builder()->Add<HConstant>(elements_size());
   HInstruction* mul = HMul::New(zone(), context, length_node,
                                 elements_size_value);
   mul->ClearFlag(HValue::kCanOverflow);
   builder()->AddInstruction(mul);
 
   HInstruction* base = builder()->Add<HConstant>(base_size);
   HInstruction* total_size = HAdd::New(zone(), context, base, mul);
@@ skipping 1892 matching lines @@
       JoinContinue(stmt, current_block(), break_info.continue_block());
 
   if (body_exit != NULL) {
     set_current_block(body_exit);
 
     HValue* current_index = Pop();
     HInstruction* new_index = HAdd::New(zone(),
                                         environment()->LookupContext(),
                                         current_index,
                                         graph()->GetConstant1());
-    new_index->AssumeRepresentation(Representation::Integer32());
     PushAndAdd(new_index);
     body_exit = current_block();
   }
 
   HBasicBlock* loop_exit = CreateLoop(stmt,
                                       loop_entry,
                                       body_exit,
                                       loop_successor,
                                       break_info.break_block());
 
@@ skipping 6136 matching lines @@
   if (ShouldProduceTraceOutput()) {
     isolate()->GetHTracer()->TraceHydrogen(name(), graph_);
   }
 
 #ifdef DEBUG
   graph_->Verify(false);  // No full verify.
 #endif
 }
 
 } }  // namespace v8::internal