Tag smi-constants as smi. This also fixes code that copies holes into arrays.

src/x64/lithium-codegen-x64.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 413 matching lines @@
 
 
 XMMRegister LCodeGen::ToDoubleRegister(LOperand* op) const {
   ASSERT(op->IsDoubleRegister());
   return ToDoubleRegister(op->index());
 }
 
 
 bool LCodeGen::IsInteger32Constant(LConstantOperand* op) const {
   return op->IsConstantOperand() &&
-      chunk_->LookupLiteralRepresentation(op).IsInteger32();
+      chunk_->LookupLiteralRepresentation(op).IsSmiOrInteger32();
 }
 
 
 bool LCodeGen::IsSmiConstant(LConstantOperand* op) const {
   return op->IsConstantOperand() &&
       chunk_->LookupLiteralRepresentation(op).IsSmi();
 }
 
 
 bool LCodeGen::IsTaggedConstant(LConstantOperand* op) const {
@@ skipping 5235 matching lines @@
                                FixedArray::kHeaderSize - kPointerSize));
   __ bind(&done);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X64