David Blaikie cc2f41673b Revert "Make BitCodeAbbrev ownership explicit using shared_ptr rather than IntrusiveRefCntPtr"
Breaks Clang's use of bitcode. Reverting until I have a fix to go with
it there.

This reverts commit r291006.

llvm-svn: 291007
2017-01-04 21:19:28 +00:00
..