A little refactoring of TcIface on LitInteger
A little refactoring of TcIface on LitInteger

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