#3744: Comparisons against minBound/maxBound not optimised
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Reporter: rl | Owner:
Type: bug | Status: closed
Priority: normal | Milestone: 7.2.1
Component: Compiler | Version: 6.13
Resolution: fixed | Keywords:
Testcase: | Blockedby:
Difficulty: | Os: Unknown/Multiple
Blocking: | Architecture: Unknown/Multiple
Failure: Runtime performance bug |
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Comment(by michalt):
Replying to [comment:10 simonpj]:
> The optimisation seems ok, but does this situation ever arise in
practice?
> Who asks `x < minBound`?
>
> Simon
Well, I'm pretty sure I've never wrote something like that. ;)
On the other hand the ticket has been around for a while with a comment or
two,
so I thought that the optimization might be useful for someone. But I
don't
really feel strongly about it.
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/3744#comment:11>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler
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