#7684: cgrun071 segfaults ----------------------------------+---------------------------------- Reporter: tibbe | Owner: Type: bug | Status: new Priority: normal | Milestone: 7.8.1 Component: Compiler | Version: 7.7 Resolution: | Keywords: Operating System: MacOS X | Architecture: x86_64 (amd64) Type of failure: Runtime crash | Difficulty: Unknown Test Case: cgrun071 | Blocked By: Blocking: | Related Tickets: ----------------------------------+---------------------------------- Comment (by rwbarton): (According to [http://gcc.gnu.org/ml/gcc/2013-01/msg00447.html this discussion with an editor of the System V x86_64 ABI], a callee must NOT assume that its arguments have been sign-/zero-extended to fill their registers. So the gcc 4.2 `hs_popcnt8` is wrong, and the gcc 4.8 `hs_popcnt8` is right. However, pointing the finger at a widely-installed compiler is not very helpful when we could presumably fix the issue by doing the zero-extension in ghc instead.) -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/7684#comment:30 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler