fix another bug in CmmOpt
fix another bug in CmmOpt

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