Partial revert of 187310; it seems MSVC 10 still spits out this warning, but MSVC 11 does not.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@187331 91177308-0d34-0410-b5e6-96231b3b80d8
Remove use of sprintf added to X86 disassembler tablegen code. Send message with instruction name to errs() instead and use a generic message for the llvm_unreachable. Consistent with other places in this file.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@187333 91177308-0d34-0410-b5e6-96231b3b80d8
Update comments for SSAUpdater to use the modern doxygen comment
standards for LLVM. Remove duplicated comments on the interface from the
implementation file (implementation comments are left there of course).
Also clean up, re-word, and fix a few typos and errors in the commenst
spotted along the way.

This is in preparation for changes to these files and to keep the
uninteresting tidying in a separate commit.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@187335 91177308-0d34-0410-b5e6-96231b3b80d8
Fix -Wdocumentation warnings.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@187336 91177308-0d34-0410-b5e6-96231b3b80d8