Add a test that .align directives on capable processors use long NOPs.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@176490 91177308-0d34-0410-b5e6-96231b3b80d8
Clarify comment for function getObjectSize

Clarify that we mean the object starting at the pointer to the end of the
underlying object and not the size of the whole allocated object.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@176491 91177308-0d34-0410-b5e6-96231b3b80d8