[GHC] #9304: Floating point woes; Different behavior on Mac vs Linux

[GHC]

#9304: Floating point woes; Different behavior on Mac vs Linux
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        Reporter:  lerkok            |            Owner:
            Type:  bug               |           Status:  new
        Priority:  high              |        Milestone:
       Component:  Compiler          |          Version:  7.8.3
      Resolution:                    |         Keywords:  floating point
Operating System:  Unknown/Multiple  |     Architecture:  Unknown/Multiple
 Type of failure:  None/Unknown      |       Difficulty:  Unknown
       Test Case:                    |       Blocked By:  9276
        Blocking:                    |  Related Tickets:
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Comment (by lerkok):

 @carter: Ah, that's better! With "-O", I get the correct result. (i.e.,
 the one that matches the Mac.)

 In fact, no other flags needed. With "-O" I get the correct behavior;
 regardless of -msse2/-fexcess-precision, and without "-O" I get the
 incorrect one.

 So, when compiled with optimizations it's correct, but not without? I'm
 not sure what to make of this.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9304#comment:15>
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