Haskell's GHC is working on it [1]. It's not primetime (not even close, really), but it does work with modified libraries and compiling to llvm.

There is also Intel Lab's HRC (Haskell Research Compiler) that does have SIMD capabilities [2]. Unfortunately, there isn't a public release of HRC yet.

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[1]: https://ghc.haskell.org/trac/ghc/wiki/SIMD

[2]: http://dorchard.wordpress.com/2013/10/14/automatic-simd-vect...