#1658: CSE changes semantics
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Reporter: guest | Owner:
Type: bug | Status: new
Priority: normal | Milestone:
Component: Compiler | Version: 6.7
Severity: normal | Resolution:
Keywords: | Difficulty: Unknown
Os: Multiple | Testcase:
Architecture: Multiple |
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Comment (by [EMAIL PROTECTED]):
Right: GHC.Base contains the rule:
{{{"x# -# x#" forall x#. x# -# x# = 0#}}}
but (NaN - NaN) is NaN, not 0. That's why the bug only gets triggered when
CSE is on: otherwise, the code isn't of the form (x - x).
-Tim
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/1658>
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