[patch,fortran] Add test to gfortran.dg (gave an ICE with -ftree-optimize) (PR30092)

[Tobias Burnus]

This test case makes probably only sense with -ftree-optimize one SSE
systems. Assuming that Tobias S.'s patch -ftree-optimize will be checked
in, I left out any dg-options.

When gimple was changed, this broke the sqrt(:) vectorization on AMD64.

As suggested by Thomas:
"could write this into a test case for gfortran.dg? If it broke once, we
should at make sure it doesn't break again."

Tobias

2006-12-08  Tobias Burnus  <burnus@net-b.de>

    * gfortran.dg/array_2.f90: Added sqrt test.
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