[dragontamer]

The linked document describes Intel's autovectorizer, it's warnings and compiler flags that point out which loops autovectorized or not, as well as listing specific reason codes why.

Microsoft, GCC and Clang all do this too, though with different compiler flags and messages.

I'd say that the whole point of this document listed here is to build up the programmer to understanding these error messages and specifically know how to fix the errors that causes a autovectorization-fail.