tree 491c6dd5cd1ce0121196b742286430a2ffd1a1d4
parent 008e41230a702ddb4c558fca95af5d84d56b51cb
author Carl Shapiro <cshapiro@google.com> 1308952266 -0700
committer Carl Shapiro <cshapiro@google.com> 1308979255 -0700

Add an instruction abstraction and visitor.

Change-Id: I5dc935831471296b6db1affef6e7ddcdddc82dde