#10677: slightly silly assembly for testing whether a Word# is 0## -------------------------------------+------------------------------------- Reporter: rwbarton | Owner: Type: bug | Status: closed Priority: low | Milestone: Component: Compiler | Version: 7.11 (CodeGen) | Resolution: fixed | Keywords: newcomer Operating System: Unknown/Multiple | Architecture: x86_64 Type of failure: Runtime | (amd64) performance bug | Test Case: Blocked By: | Blocking: Related Tickets: #10750 | Differential Revisions: Phab:D1137 -------------------------------------+------------------------------------- Comment (by nomeata): This causes a `+ 15.08%` runtime regression in fannkuch-redux: https://perf.haskell.org/ghc/#graph/nofib/time/fannkuch- redux;hl=92f35cd9829db7555397aa3dc8cd243d17694fee This is a bit strange... is this just a possible reordering of basic blocks? -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/10677#comment:9 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler