delinearize memory access functions

git-svn-id: https://llvm.org/svn/llvm-project/polly/trunk@205799 91177308-0d34-0410-b5e6-96231b3b80d8
clang format last patch

git-svn-id: https://llvm.org/svn/llvm-project/polly/trunk@205804 91177308-0d34-0410-b5e6-96231b3b80d8