#14644: Improve cmm/assembly for pattern matches with two constants. -------------------------------------+------------------------------------- Reporter: AndreasK | Owner: (none) Type: task | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.2.2 (CodeGen) | Keywords: Codegen, CMM, Resolution: | Patterns, Pattern Matching Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by AndreasK): It should also be possible to see the difference using criterion or instruction counters when running affected code in a tight loop. I will take a stab at changing the logic to `if ... else if ... else` for these cases. I think that's a good starting point to learn how Cmm works inside GHC. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/14644#comment:2 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler