LLVM: Vector code segfaults under OSX

The following code:

import Data.Vector.Unboxed as V

main = foo 0 `seq` return ()

foo :: Int -> Vector Int
foo n = V.zipWith (\i j -> if i == j then 0 else 1)
              (V.replicate n 0) (V.enumFromTo 0 (n - 1))

Segfaults under OSX when compiled with GHC HEAD with the following flags:

ghc -fllvm -O2 -optlc-O3 --make v.hs

The problem only occurs when ghc is set to -O2 and llc is set to -O3. (opt tools optimisation level doesn't seem to matter).

The problem also only occurs when TNTC is enabled.

Trac metadata

Trac field	Value
Version	6.13
Type	Bug
TypeOfFailure	OtherFailure
Priority	normal
Resolution	Unresolved
Component	Compiler (LLVM)
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