Add Pass manager for MIR#31916

Merged

bors merged 4 commits intorust-lang:masterfrom

nagisa:mir-passmgr-2

Mar 13, 2016

Commits on Mar 4, 2016

Commits on Mar 7, 2016

Change MirPass to also take NodeId
nagisa
committed

Commits on Mar 12, 2016

Implement --unpretty mir-cfg for graphviz output
nagisa
committed