[GHC] #9304: Floating point woes; Different behavior on 32- vs 64-bit x86

[GHC]

#9304: Floating point woes; Different behavior on 32- vs 64-bit x86
-------------------------------------+------------------------------------
        Reporter:  lerkok            |            Owner:
            Type:  bug               |           Status:  new
        Priority:  normal            |        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:
-------------------------------------+------------------------------------

Comment (by carter):

 @lerkok I think @rwbarton has the problem nailed.

 If I'm understanding everything correctly, the culprit here is that GHC's
 const evaluation tooling doesn't respect the implicit floating point model
 induced by -msse2 vs -f-excess-precision ?

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9304#comment:29>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler