Commits
Michael Gottesman committed a3aa89d4c46
Remove Callback from SILBuilder and instead rename
emit{StrongRelease,ReleaseValue} => emit{StrongRelease,ReleaseValue}AndFold.
Then introduce a new method emit{StrongRelease,ReleaseValue} that returns a
PointerUnion containing the increment to be deleted if it exists. This obviates
the need for the callback.
Swift SVN r27804