Fix formatting

git-svn-id: https://llvm.org/svn/llvm-project/polly/trunk@201816 91177308-0d34-0410-b5e6-96231b3b80d8
Add polyhedral dead code elimination.

This pass eliminates loop iterations that compute results that are not used
later on. This can help e.g. in D, where the default zero-initialization is
often unnecessary if right after new values are assigned to an array.

Contributed-by: Peter Conn <conn.peter@gmail.com>

git-svn-id: https://llvm.org/svn/llvm-project/polly/trunk@201817 91177308-0d34-0410-b5e6-96231b3b80d8