When we compute descendent heads and descendent/ancestor tags, we
cache the results. We need to be careful to invalidate the cache
when we add stuff to the graph. Also make sure that when we cache
descendent heads for a node we only cache the heads that are actually
descendents of that node.
Signed-off-by: Paul Mackerras <paulus@samba.org>
Git Source Code Mirror - This is a publish-only repository but pull requests can be turned into patches to the mailing list via GitGitGadget (https://gitgitgadget.github.io/). Please follow Documentation/SubmittingPatches procedure for any of your improvements.