I'm not sure whether this is a good direction - adding one example for each item might be pretty verbose considering that they are basic constructs.
What about having a code snippet that includes all of these types (including integers) after There are no constants of type x86_mmx.?
+ Adding reviewers who are working as reviewers for LangRef patches
Yeah, this doesn't look particularly useful to me.
Something I'd love to see though is a listing of special values for all floating point types. Always takes me a while to figure out how to test various inf/nan/sz for different float types, with their encoding peculiarities.