#2132: Optimise nested comparisons
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Reporter: simonpj | Owner:
Type: bug | Status: patch
Priority: low | Milestone: 7.4.1
Component: Compiler | Version: 6.8.2
Keywords: | Testcase:
Blockedby: | Difficulty: Unknown
Os: Unknown/Multiple | Blocking:
Architecture: Unknown/Multiple | Failure: Runtime performance bug
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Comment(by simonmar):
Wow, there's quite a lot of code here. Simon: we need to review and
decide what to do. Somehow this optimisation feels similar to what the
simplifier already does with case expressions (eliminating redundant
cases, and branches that can't match), and perhaps it ought to be
incorporated into the simplifier.
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/2132#comment:14>
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