#3744: Comparisons against minBound/maxBound not optimised for (Int|Word)(8|16|32) -------------------------------------+------------------------------------- Reporter: rl | Owner: Type: feature request | Status: new Priority: low | Milestone: 7.12.1 Component: Compiler | Version: 6.13 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: Runtime | Unknown/Multiple performance bug | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Revisions: -------------------------------------+------------------------------------- Changes (by rwbarton): * cc: rwbarton (added) Comment: I just ran into this too. Perhaps the thing to do is to generate rules in PrelRules like {{{ narrow8IntOp x < 127 = True }}} etc. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/3744#comment:19 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler