#8250: cgrun072 (optllvm) failing -------------------------------------+------------------------------------ Reporter: leroux | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler (LLVM) | Version: 7.6.3 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Unknown/Multiple Type of failure: Runtime crash | Difficulty: Unknown Test Case: cgrun072 | Blocked By: Blocking: | Related Tickets: 7902 -------------------------------------+------------------------------------ Comment (by rwbarton): A correction to the last bullet point in my previous comment: fixing `GHC.Word.byteSwap{16,32}` actually *does* matter because a user program built with `-O -fllvm` will inline those functions at the Haskell level, and then the LLVM backend will generate the wrong code for the byte-swap primop. {{{ import GHC.Word main = print $ byteSwap32 (0xaabbccdd :: Word32) -- built with ghc -O -fllvm -- expected output: 3721182122 -- actual output: -573785174 }}} The cgrun072 test should test the `GHC.Word.byteSwap*` wrappers, too. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/8250#comment:3 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler