beam_ssa: Add helper functions and export more types
beam_ssa: Add helper functions and export more types

get_anno/3: as get_anno but with a default value
definitions/1-2: returns a map of variable definitions (#b_set{})
uses/1-2: returns a map of all uses of a given variable
mapfold_blocks_rpo/4: mapfolds over blocks

emacsmirror/erlang,vladdu/otp,uabboli/otp,erlang/otp,isvilen/otp,dgud/otp,kvakvs/otp,lrascao/otp,electricimp/otp,bjorng/otp,potatosalad/otp,mikpe/otp,emacsmirror/erlang,emacsmirror/erlang,kvakvs/otp,bsmr-erlang/otp,ferd/otp,vladdu/otp,RoadRunnr/otp,getong/otp,jj1bdx/otp,jj1bdx/otp,electricimp/otp,mikpe/otp,bjorng/otp,vinoski/otp,vinoski/otp,jj1bdx/otp,electricimp/otp,bsmr-erlang/otp,dgud/otp,vinoski/otp,aboroska/otp,vladdu/otp,uabboli/otp,ferd/otp,jj1bdx/otp,dgud/otp,jj1bdx/otp,rlipscombe/otp,jj1bdx/otp,RoadRunnr/otp,vladdu/otp,vladdu/otp,kvakvs/otp,ferd/otp,uabboli/otp,g-andrade/otp,rlipscombe/otp,rlipscombe/otp,bjorng/otp,dgud/otp,mikpe/otp,emacsmirror/erlang,RaimoNiskanen/otp,potatosalad/otp,mikpe/otp,legoscia/otp,dumbbell/otp,vladdu/otp,mikpe/otp,electricimp/otp,aboroska/otp,bsmr-erlang/otp,getong/otp,erlang/otp,g-andrade/otp,dumbbell/otp,erlang/otp,bjorng/otp,kvakvs/otp,dgud/otp,isvilen/otp,jj1bdx/otp,vinoski/otp,erlang/otp,jj1bdx/otp,dumbbell/otp,uabboli/otp,erlang/otp,RoadRunnr/otp,isvilen/otp,emacsmirror/erlang,getong/otp,mikpe/otp,lrascao/otp,RaimoNiskanen/otp,RoadRunnr/otp,rlipscombe/otp,potatosalad/otp,uabboli/otp,RoadRunnr/otp,aboroska/otp,legoscia/otp,vinoski/otp,dumbbell/otp,RaimoNiskanen/otp,electricimp/otp,potatosalad/otp,bjorng/otp,dgud/otp,RaimoNiskanen/otp,getong/otp,dgud/otp,mikpe/otp,kvakvs/otp,g-andrade/otp,bjorng/otp,bjorng/otp,vladdu/otp,potatosalad/otp,isvilen/otp,electricimp/otp,g-andrade/otp,getong/otp,potatosalad/otp,emacsmirror/erlang,potatosalad/otp,vladdu/otp,g-andrade/otp,mikpe/otp,aboroska/otp,emacsmirror/erlang,lrascao/otp,getong/otp,lrascao/otp,isvilen/otp,RaimoNiskanen/otp,isvilen/otp,jj1bdx/otp,ferd/otp,dgud/otp,legoscia/otp,RoadRunnr/otp,bjorng/otp,dumbbell/otp,aboroska/otp,bsmr-erlang/otp,emacsmirror/erlang,ferd/otp,bsmr-erlang/otp,isvilen/otp,bjorng/otp,getong/otp,dumbbell/otp,erlang/otp,vinoski/otp,mikpe/otp,vinoski/otp,RoadRunnr/otp,RaimoNiskanen/otp,legoscia/otp,dumbbell/otp,ferd/otp,isvilen/otp,rlipscombe/otp,g-andrade/otp,electricimp/otp,RoadRunnr/otp,erlang/otp,g-andrade/otp,uabboli/otp,vinoski/otp,uabboli/otp,rlipscombe/otp,kvakvs/otp,electricimp/otp,potatosalad/otp,lrascao/otp,uabboli/otp,vladdu/otp,legoscia/otp,potatosalad/otp,potatosalad/otp,legoscia/otp,mikpe/otp,g-andrade/otp,lrascao/otp,legoscia/otp,kvakvs/otp,electricimp/otp,bsmr-erlang/otp,lrascao/otp,bsmr-erlang/otp,bsmr-erlang/otp,emacsmirror/erlang,dgud/otp,ferd/otp,kvakvs/otp,lrascao/otp,rlipscombe/otp,isvilen/otp,erlang/otp,dumbbell/otp,kvakvs/otp,lrascao/otp,RaimoNiskanen/otp,dumbbell/otp,getong/otp,aboroska/otp,g-andrade/otp,bsmr-erlang/otp,RoadRunnr/otp,rlipscombe/otp,vinoski/otp,uabboli/otp,RaimoNiskanen/otp,ferd/otp,erlang/otp,erlang/otp,aboroska/otp,vinoski/otp,aboroska/otp,getong/otp,RaimoNiskanen/otp,dumbbell/otp,g-andrade/otp,bjorng/otp,isvilen/otp,getong/otp,ferd/otp,jj1bdx/otp,legoscia/otp,rlipscombe/otp,legoscia/otp,rlipscombe/otp,emacsmirror/erlang,dgud/otp,aboroska/otp