unsafeCoerce# between integral and floating point types

[John Meacham]

On Fri, Jul 09, 2010 at 07:14:58AM -1000, Lennart Augustsson wrote:
> That might not work if the alignment constraints differ between the two types.

Easy enough to fix, just compare the alignments and alloca with the
greater of the two. the optimizer should be able to optimize out the
test. 

of course, this bug[1] makes it sort of moot in ghc at least. 

[1] http://hackage.haskell.org/trac/ghc/ticket/r2917


        John

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