tree f924ecd789e07e1666991ae5521c48e5cde00e2c
parent 0f88fcab1ac2ce601d2159ad05931a34d6bced98
author Ivan Frade <ifrade@google.com> 1769641645 -0800
committer Ivan Frade <ifrade@google.com> 1770154157 -0800
change-id uvpsmksmmuyolyzvpwyzzrowokxqvqmk

RefAdvancer: helper to find when a branch enters a pack

For the bitmap calculation in midx, we need to follow a tip until it enters a
pack.

Add a helper to advance tips until they find their entry point into a pack.

Change-Id: I54a7df7dd51be104a31008b3bf2949df6a6a6964