Clean up the formatting and trailing whitespace of a routine before
editting it.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@220146 91177308-0d34-0410-b5e6-96231b3b80d8
Clean up doxygen syntax and reword comments to flow better, have a brief
section, and not have unfinished sentence fragments.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@220147 91177308-0d34-0410-b5e6-96231b3b80d8
More formatting cleanup brought to you by clang-format.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@220149 91177308-0d34-0410-b5e6-96231b3b80d8
Fix the other comment to use modern doxygen style and be a bit more
direct. Notably, comment on the fact that the loaded type is significant
in that it determines how wide of an access must be safe.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@220150 91177308-0d34-0410-b5e6-96231b3b80d8
Rename 'TD' to 'DL' in this function as the argument is now a DataLayout
argument.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@220151 91177308-0d34-0410-b5e6-96231b3b80d8