#11295: Figure out what LLVM passes are fruitful -------------------------------------+------------------------------------- Reporter: bgamari | Owner: kavon Type: task | Status: new Priority: normal | Milestone: Component: Compiler (LLVM) | Version: 7.10.3 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by kavon): Ben, I think the autotuner is now ready to be applied to Haskell programs: it can successfully tune C/C++ programs, with or without running the output program, to match -O3 in a reasonable time. If it's not too late, I can try to get something in for 8.4. My plan is to pick a few "representative" programs*, tune on each one individually, and see which pass ordering does the best across nofib. If one of them does better than the -Ox passes, we could drop it in GHC pretty easily. What do you think? * Suggestions are welcome here. Infrastructure to tune against the "average" of several programs (using a special objective function) would be ideal, but that infrastructure is not ready yet. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/11295#comment:14 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler