Thanks @kcc @eugenis @samsonov Just a gentle reminder, that this patch is dependent on http://reviews.llvm.org/D6146 and http://reviews.llvm.org/D6147 I have one more query, is there is any plan to accept msan32?, if yes I will update whatever changes needed in http://reviews.llvm.org/D5672 http://reviews.llvm.org/D5906