UNDO: Be a little keener to inline
UNDO: Be a little keener to inline

This patch caused at least the following test failures:
   1744(normal)
   ghci028(ghci)
   unicode001(normal)
and additionally made the stage3 build fail.  

A little more validation please!

I didn't find the exact cause of the failure yet, but it appears that
the Lexer is miscompiled in some strange way.  If any of {Encoding,
StringBuffer, or Lexer} are compiled without -O, the problem goes
away.

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