Make the occurrence analyser track preInlineUnconditionally
Make the occurrence analyser track preInlineUnconditionally

This fixes a somewhat obscure situation in which an
over-optimistic use of "occurs once" led to an infinite
sequence of simplifier iterations.  Se Note [Cascading inlines]
for the details.

This showed up when compiling rather large DPH programs, which
run lots of iterations of the simplifier, which in turn made
compilation take much longer than necessary.

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