#8279: bad alignment in code gen yields substantial perf issue -------------------------------------+------------------------------------- Reporter: carter | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.7 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: Runtime | Unknown/Multiple performance bug | Test Case: Blocked By: | Blocking: Related Tickets: #8082 | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by George): re Simon PJ's comment 17, would it be relatively easy to do this with the llvm compiler? AFAIK opt and llc don't seem to have the appropriate options but clang has -Os and -Oz (see [https://clang.llvm.org/docs/CommandGuide/clang.html]) so I would hope it wouldn't be too hard to do in the Haskell llvm compiler. Also wrt llvm there is mention of alignment here [http://llvm.org/docs/Frontend/PerformanceTips.html]. I'm sure most people interested in the llvm compiler are aware of this doc but I thought I may as well mention it to be complete. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/8279#comment:26 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler