per Module instead of once per CompileUnit, and print the
module name. A module may have a mix of compile units built with
optimization and compile units built without optimization -- the
warning won't be printed until the user selects a stack frame of
a function that was built with optimization. And as before, it
will only be printed once per module per debug session.
<rdar://problem/19281172>
llvm-svn: 244281
03c9cd0852