id,summary,reporter,owner,description,type,status,priority,milestone,component,version,resolution,keywords,cc,os,architecture,failure,difficulty,testcase,blockedby,blocking,related
955,more object-code blow-up in ghc-6.8.3 vs. ghc-6.4.2 (both with optimization),maeder@…,,"After upgrading from ghc-6.4.2 to ghc-6.6 our already large binary became noticeably larger.

I'll include a test case based on the programatica sources and our ATerm library. It's only necessary to compile the two top-level files ATC.hs and ATC2.hs and the files in Common/ATerm with optimization. This produces large object files (under i386 linux) of the following sizes:

using ghc-6.4.2:
160K ATC2.o  721K ATC.o  (-O0)
2,1M ATC2.o  1,7M ATC.o  (-O)

using ghc-6.6:
156K ATC2.o  729K ATC.o  (-O0)
4,1M ATC2.o  1,8M ATC.o  (-O)

After unpacking atc.tgz calling make should check out some programatica sources and compile everything with optimization up to ATC2.o. (programatica requires the convert.sh script for ghc-6.6) 

Christian

P.S. I've check the old ticket http://hackage.haskell.org/trac/ghc/ticket/490
(In that example the object code does no longer blow up.)",bug,closed,high,6.10.1,Compiler,6.8.3,fixed,object-code blow-up,simonpj@…,Unknown/Multiple,Unknown/Multiple,Runtime performance bug,Unknown,,,,