[patch, fortran] Handle MATMUL(TRANSPOSE(A),B) in inline matmul

[Thomas Koenig]

Hello world,

after receiving no negative feedback on my RFC patch, I have deciced
to submit the patch.

The attached patch handles MATMUL(TRANSPOSE(A),B) in inlining matmul.
Speed is a bit faster than the library version.

Regression-tested.  OK for trunk?

Regards

	Thomas

2017-05-17  Thomas Koenig  <tkoenig@gcc.gnu.org>

         PR fortran/66094
         * frontend-passes.c (matrix_case):  Add A2TB2.
         (inline_limit_check):  Handle MATMUL(TRANSPOSE(A),B)
         (inline_matmul_assign):  Likewise.

2017-05-17  Thomas Koenig  <tkoenig@gcc.gnu.org>

         PR fortran/66094
         * gfortran.dg/inline_matmul_16.f90:  New test.
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