Fix pass-sizes CFG handling
Fix pass-sizes CFG handling

Summary: The extra passes may require construction of an editable CFG.

Reviewed By: wsanville

Differential Revision: D39693823

fbshipit-source-id: a40df8031e5030d4a71643c0ec989faa18135f9e

facebook/redex,facebook/redex,facebook/redex,facebook/redex,facebook/redex,facebook/redex,facebook/redex,facebook/redex,facebook/redex