beam_ssa_opt: Eliminate redundant match alignment tests
beam_ssa_opt: Eliminate redundant match alignment tests

The beam_ssa_bsm pass welds chained matches together, but the match
expressions themselves are unchanged and if there's a tail
alignment check it will be done each time. This subpass figures out
the checks we've already done and deletes the redundant ones.

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