tree 0c61a0b2531ca89ec83cbbc669d5fd752e49e84a
parent f8dbed0455c04e42ef6b833dbd70a8c79a12ec0c
author Lei Zhang <antiagainst@google.com> 1474404480 -0400
committer Lei Zhang <antiagainst@google.com> 1474404480 -0400

Allow changing MessageConsumer in Pass & PassManager.

Default-constructed Pass/PassManager will have a MessageConsumer
which ignores all messages. SetMessageConsumer() should be called
to supply a meaningful MessageConsumer.