PR exp/12117
* gdbtypes.c (check_typedef): Clean up function comment.
Keep track of instance flags as we strip typedefs and create a new
type to preserve them if necessary.
* gdbtypes.h (type) <instance_flags>: Extend the comment.
gdb/testsuite/
PR exp/12117
* gdb.cp/ptype-cv-cp.cc: New file.
* gdb.cp/ptype-cv-cp.exp: New file.