2018-09-18  Thomas Koenig  <tkoenig@gcc.gnu.org>

	PR fortran/29550
	* gfortran.h (gfc_expr): Add external_blas flag.
	* frontend-passes.c (matrix_case): Add case A2TB2T.
	(optimize_namespace): Handle flag_external_blas by
	calling call_external_blas.
	(get_array_inq_function): Add argument okind. If
	it is nonzero, use it as the kind of argument
	to be used.
	(inline_limit_check): Remove m_case argument, add
	limit argument instead.  Remove assert about m_case.
	Set the limit for inlining from the limit argument.
	(matmul_lhs_realloc): Handle case A2TB2T.
	(inline_matmul_assign): Handle inline limit for other cases with
	two rank-two matrices.  Remove no-op calls to inline_limit_check.
	(call_external_blas): New function.
	* trans-intrinsic.c (gfc_conv_intrinsic_funcall): Do not add
	argument to external BLAS if external_blas is already set.

2018-09-18  Thomas Koenig  <tkoenig@gcc.gnu.org>

	PR fortran/29550
	* gfortran.dg/inline_matmul_13.f90: Adjust count for
	_gfortran_matmul.
	* gfortran.dg/inline_matmul_16.f90: Likewise.
	* gfortran.dg/promotion_2.f90: Add -fblas-matmul-limit=1.  Scan
	for dgemm instead of dgemm_.  Add call to random_number to make
	standard conforming.
	* gfortran.dg/matmul_blas_1.f90: New test.
	* gfortran.dg/matmul_bounds_14.f: New test.
	* gfortran.dg/matmul_bounds_15.f: New test.
	* gfortran.dg/matmul_bounds_16.f: New test.
	* gfortran.dg/blas_gemm_routines.f: New test / additional file for
	preceding tests.

From-SVN: r264412