Duncan P. N. Exon Smith 89c5e6ff49 DI: Clarify isUnsignedDIType(), NFC
Refactor `isUnsignedDIType()` to deal with `DICompositeType` explicitly.
Since `DW_TAG_subroutine_type` isn't handled here (the assertions about
tags rule it out), this allows strengthening the `dyn_cast` to
`DIDerivedType`.

Besides making the code clearer, this it removes a use of
`DIDerivedTypeBase`.

llvm-svn: 243148
2015-07-24 19:42:12 +00:00
..