#8404: Default to turning on architecture specific optimizations in the codegen ------------------------------------+------------------------------------- Reporter: tibbe | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.6.3 Keywords: | Operating System: Unknown/Multiple Architecture: Unknown/Multiple | Type of failure: None/Unknown Difficulty: Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | ------------------------------------+------------------------------------- LLVM defaults to turning on whatever architecture specific optimizations are supported on the user's machine (e.g. `-msse4.2`). This makes programs run faster during testing and generally gives users a better perception of the compiler. If the user wants to compile for some more portable subset (e.g. when cross-compiling) he/she adds `-march`, `-mcpu`, etc flags on the command line. To implement this we'd have to detect what CPU type is used etc and initialize our `DynFlags` based on that. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/8404 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler