Keep the CPS pass from creating proc points due to unreachable parents.
Keep the CPS pass from creating proc points due to unreachable parents.

The parser/flattener will generate an extra block after an if/else 
statement even if both branches exit the function.  So it is possible
for the input to the CPS pass to have dead/unreachable blocks.

If a dead block goes to a live block then the live block would
have more parents than the dead block and prior to this patch
the live block would then be identified as a proc point.
This is fixed by adding a check to see if the parent
has at least one owner.

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