Properly align inline space for ImplicitConversionSequences in OverloadSet.

This bug was reported by UBSan.


git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@216694 91177308-0d34-0410-b5e6-96231b3b80d8
Don't load ill-formed AmbiguityKind in Sema::Lookup.

This bug was reported by UBSan.


git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@216695 91177308-0d34-0410-b5e6-96231b3b80d8
Don't load invalid enum value in Sema::LazilyCreateBuiltin.

This bug was reported by UBSan.


git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@216696 91177308-0d34-0410-b5e6-96231b3b80d8