How to use llvm with ghc7?

[Magicloud Magiclouds]

Hi,
  I just got ghc7 and compiled with ghc6.12.1 and default configuration.
  ghc works fine. So I tried to use llvm. I got:
ghc -fllvm badge.hs
[1 of 1] Compiling Main             ( badge.hs, /tmp/Main.o )
opt: Bitcode stream should be a multiple of 4 bytes in length
  I am using debian 32bit system, llvm 2.6.
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