#9238: Negative zero broken ------------------------------------------------+-------------------------- Reporter: augustss | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.8.2 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: Incorrect result at runtime | Unknown/Multiple Test Case: | Difficulty: Blocking: | Unknown | Blocked By: | Related Tickets: ------------------------------------------------+-------------------------- Comment (by carter): I can reproduce the behavior on ghc 7.8.2 on OS X 64 bit i've also started taking a look at the core generated for the 3 alternatives lennart laid out, using variations of the following ghc invocation {{{ ghc -O1 -ddump-simpl -dsuppress-idinfo -dsuppress-coercions -dsuppress- type-applications -dsuppress-uniques -dsuppress-module-prefixes bugMain.hs
bugO1CoreNOINLINE.simple }}}
though i'm still working through which differences are real and which arent https://gist.github.com/cartazio/351f15ae74257a7ab64d -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/9238#comment:4 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler