I only referred to LLVM as proof that the problem seems to be limited to NCG as both NCG and LLVM will share the same C-- output (or at least I
#8971: Native Code Generator 7.8.1 RC2 is not as optimized as 7.6.3... --------------------------------------------+------------------------------ Reporter: GordonBGood | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler (NCG) | Version: 7.8.1-rc2 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: Runtime performance bug | Unknown/Multiple Test Case: | Difficulty: Unknown Blocking: | Blocked By: | Related Tickets: --------------------------------------------+------------------------------ Comment (by tibbe): Replying to [comment:8 GordonBGood]: think so???) yet NCG shows this step backwards whereas LLVM does not. That's a good indication that the NGC is to blame, but it's also possible that the Cmm codegen has regressed but some LLVM optimizations make up for the regression. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/8971#comment:9 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler