Changes between Version 6 and Version 7 of PrimBool

Show
Ignore:
Timestamp:
01/26/13 03:40:36 (4 months ago)
Author:
jstolarek
Comment:

--

Legend:

Unmodified
Added
Removed
Modified

  • PrimBool

    v6 v7  
    7878}}} 
    7979 
    80 There are five possible branches to take, although four of them have the same result. This is caused by code duplication introduced by case-of-case transform. According to Ben Lippmeier, who submitted the original bug report, mis-predicted branches are bad in object code because they stall the pipeline. 
     80There are five possible branches to take, although four of them have the same result. This is caused by code duplication introduced by case-of-case transform (see [http://ics.p.lodz.pl/~stolarek/blog/2013/01/taking-magic-out-of-ghc-or-tracing-compilation-by-transformation/ this blog post] for a step by step derivation). According to Ben Lippmeier, who submitted the original bug report, mis-predicted branches are bad in object code because they stall the pipeline. 
    8181 
    8282== Possible solutions and their consequences ==