Move comment on Sema::isFunctionPointerVarDecl() to the header file


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@184677 91177308-0d34-0410-b5e6-96231b3b80d8
Add -ast-dump-lookups switch to -cc1 to dump DeclContext lookup maps. Test to
follow.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@184678 91177308-0d34-0410-b5e6-96231b3b80d8
When setting the external visible declarations for a decl context, check
whether they replace any existing lookups in the context, rather than
accumulating a bunch of lookup results referring to the same entity.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@184679 91177308-0d34-0410-b5e6-96231b3b80d8