refactor
refactor

Summary: This is a behavior preserving change. It makes it easier to use the code-MIE-hashing for cfgs in the next diff.

Reviewed By: thezhangwei

Differential Revision: D41295521

fbshipit-source-id: 52ecd7820cfa4ac21dca361cbfa0d36c393fc076

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