#1168: Optimisation sometimes decreases sharing in IO code
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Reporter: simonmar | Owner:
Type: bug | Status: new
Priority: normal | Milestone: _|_
Component: Compiler | Version: 6.6
Severity: normal | Resolution:
Keywords: | Difficulty: Unknown
Testcase: nofib/spectral/calendar | Architecture: Unknown
Os: Unknown |
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Comment (by simonmar):
A warning would be good, but I see two potential problems:
* there would be a lot of false positives
* the warning has to be generated by the simplifier, and source-location
information has been stripped off by this point, so we don't have a
good
way to report the location of the warning.
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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/1168#comment:5>
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