Implement mapUFM_Directly.
Implement mapUFM_Directly.

Signed-off-by: Edward Z. Yang <dbd597f5635f432486c5d365e9bb585b3eaa1853@mit.edu>

snoyberg/ghc,wxwxwwxxx/ghc,AlexanderPankiv/ghc,anton-dessiatov/ghc,nkaretnikov/ghc,sdiehl/ghc,snoyberg/ghc,olsner/ghc,wxwxwwxxx/ghc,nathyong/microghc-ghc,nkaretnikov/ghc,anton-dessiatov/ghc,mettekou/ghc,forked-upstream-packages-for-ghcjs/ghc,ryantm/ghc,urbanslug/ghc,elieux/ghc,ilyasergey/GHC-XAppFix,GaloisInc/halvm-ghc,tibbe/ghc,fmthoma/ghc,christiaanb/ghc,sdiehl/ghc,AlexanderPankiv/ghc,vikraman/ghc,mettekou/ghc,da-x/ghc,lukexi/ghc-7.8-arm64,tibbe/ghc,urbanslug/ghc,wxwxwwxxx/ghc,jstolarek/ghc,acowley/ghc,ml9951/ghc,GaloisInc/halvm-ghc,ezyang/ghc,gridaphobe/ghc,oldmanmike/ghc,shlevy/ghc,oldmanmike/ghc,mcschroeder/ghc,shlevy/ghc,hferreiro/replay,sdiehl/ghc,christiaanb/ghc,jstolarek/ghc,nkaretnikov/ghc,olsner/ghc,AlexanderPankiv/ghc,mcmaniac/ghc,vikraman/ghc,vTurbine/ghc,nomeata/ghc,forked-upstream-packages-for-ghcjs/ghc,AlexanderPankiv/ghc,TomMD/ghc,gridaphobe/ghc,mcmaniac/ghc,green-haskell/ghc,sgillespie/ghc,mcschroeder/ghc,tjakway/ghcjvm,ezyang/ghc,gcampax/ghc,vTurbine/ghc,sgillespie/ghc,ezyang/ghc,ezyang/ghc,nomeata/ghc,ghc-android/ghc,nathyong/microghc-ghc,tibbe/ghc,nomeata/ghc,mfine/ghc,forked-upstream-packages-for-ghcjs/ghc,elieux/ghc,nathyong/microghc-ghc,lukexi/ghc,mcschroeder/ghc,gcampax/ghc,mfine/ghc,green-haskell/ghc,acowley/ghc,GaloisInc/halvm-ghc,TomMD/ghc,mfine/ghc,nkaretnikov/ghc,mfine/ghc,mfine/ghc,oldmanmike/ghc,shlevy/ghc,anton-dessiatov/ghc,nathyong/microghc-ghc,mcmaniac/ghc,elieux/ghc,hferreiro/replay,hferreiro/replay,mcmaniac/ghc,acowley/ghc,GaloisInc/halvm-ghc,christiaanb/ghc,elieux/ghc,sdiehl/ghc,TomMD/ghc,ryantm/ghc,vikraman/ghc,gridaphobe/ghc,oldmanmike/ghc,ghc-android/ghc,ekmett/ghc,TomMD/ghc,anton-dessiatov/ghc,acowley/ghc,mettekou/ghc,ilyasergey/GHC-XAppFix,nushio3/ghc,fmthoma/ghc,ilyasergey/GHC-XAppFix,snoyberg/ghc,tjakway/ghcjvm,sdiehl/ghc,jstolarek/ghc,lukexi/ghc,ekmett/ghc,AlexanderPankiv/ghc,acowley/ghc,siddhanathan/ghc,fmthoma/ghc,anton-dessiatov/ghc,wxwxwwxxx/ghc,ml9951/ghc,nushio3/ghc,lukexi/ghc-7.8-arm64,vTurbine/ghc,green-haskell/ghc,nathyong/microghc-ghc,GaloisInc/halvm-ghc,tjakway/ghcjvm,urbanslug/ghc,wxwxwwxxx/ghc,vikraman/ghc,bitemyapp/ghc,frantisekfarka/ghc-dsi,tjakway/ghcjvm,mettekou/ghc,nkaretnikov/ghc,wxwxwwxxx/ghc,tjakway/ghcjvm,vTurbine/ghc,AlexanderPankiv/ghc,gcampax/ghc,ghc-android/ghc,spacekitteh/smcghc,da-x/ghc,frantisekfarka/ghc-dsi,holzensp/ghc,vikraman/ghc,hferreiro/replay,nushio3/ghc,holzensp/ghc,nushio3/ghc,shlevy/ghc,olsner/ghc,hferreiro/replay,tjakway/ghcjvm,ekmett/ghc,ml9951/ghc,nushio3/ghc,mcschroeder/ghc,siddhanathan/ghc,ghc-android/ghc,sgillespie/ghc,tjakway/ghcjvm,spacekitteh/smcghc,snoyberg/ghc,snoyberg/ghc,jstolarek/ghc,christiaanb/ghc,da-x/ghc,sgillespie/ghc,vTurbine/ghc,gridaphobe/ghc,ezyang/ghc,mettekou/ghc,ml9951/ghc,TomMD/ghc,olsner/ghc,urbanslug/ghc,urbanslug/ghc,gcampax/ghc,snoyberg/ghc,snoyberg/ghc,christiaanb/ghc,forked-upstream-packages-for-ghcjs/ghc,mettekou/ghc,frantisekfarka/ghc-dsi,sgillespie/ghc,TomMD/ghc,fmthoma/ghc,shlevy/ghc,mcschroeder/ghc,anton-dessiatov/ghc,nkaretnikov/ghc,sdiehl/ghc,oldmanmike/ghc,siddhanathan/ghc,urbanslug/ghc,shlevy/ghc,TomMD/ghc,mcschroeder/ghc,forked-upstream-packages-for-ghcjs/ghc,ghc-android/ghc,da-x/ghc,nathyong/microghc-ghc,fmthoma/ghc,lukexi/ghc,mcmaniac/ghc,acowley/ghc,anton-dessiatov/ghc,siddhanathan/ghc,green-haskell/ghc,olsner/ghc,olsner/ghc,ryantm/ghc,tibbe/ghc,spacekitteh/smcghc,ekmett/ghc,wxwxwwxxx/ghc,ryantm/ghc,nushio3/ghc,hferreiro/replay,gcampax/ghc,siddhanathan/ghc,GaloisInc/halvm-ghc,AlexanderPankiv/ghc,ezyang/ghc,spacekitteh/smcghc,holzensp/ghc,sdiehl/ghc,mfine/ghc,siddhanathan/ghc,lukexi/ghc-7.8-arm64,christiaanb/ghc,oldmanmike/ghc,da-x/ghc,oldmanmike/ghc,ml9951/ghc,ezyang/ghc,ml9951/ghc,vikraman/ghc,gridaphobe/ghc,green-haskell/ghc,gcampax/ghc,christiaanb/ghc,bitemyapp/ghc,lukexi/ghc-7.8-arm64,vTurbine/ghc,lukexi/ghc,bitemyapp/ghc,ml9951/ghc,lukexi/ghc-7.8-arm64,siddhanathan/ghc,acowley/ghc,nushio3/ghc,frantisekfarka/ghc-dsi,bitemyapp/ghc,vTurbine/ghc,GaloisInc/halvm-ghc,ryantm/ghc,elieux/ghc,sgillespie/ghc,mcschroeder/ghc,fmthoma/ghc,ghc-android/ghc,sgillespie/ghc,fmthoma/ghc,urbanslug/ghc,forked-upstream-packages-for-ghcjs/ghc,shlevy/ghc,olsner/ghc,elieux/ghc,vikraman/ghc,lukexi/ghc,ml9951/ghc,nathyong/microghc-ghc,holzensp/ghc,nkaretnikov/ghc,bitemyapp/ghc,da-x/ghc,nomeata/ghc,tibbe/ghc,mfine/ghc,gridaphobe/ghc,ghc-android/ghc,ekmett/ghc,ilyasergey/GHC-XAppFix,gcampax/ghc,nomeata/ghc,elieux/ghc,da-x/ghc,spacekitteh/smcghc,frantisekfarka/ghc-dsi,holzensp/ghc,mettekou/ghc,forked-upstream-packages-for-ghcjs/ghc,hferreiro/replay,jstolarek/ghc,gridaphobe/ghc