PR fortran/64104
* expr.c (gfc_check_init_expr): Allow some IEEE functions in
constant expressions.
(external_spec_function): Allow some IEEE functions in specification
expressions.
* simplify.c (gfc_simplify_ieee_selected_real_kind): Remove.
(simplify_ieee_selected_real_kind, simplify_ieee_support,
matches_ieee_function_name, gfc_simplify_ieee_functions): New
functions.
* gfortran.h (gfc_simplify_ieee_selected_real_kind): Remove
prototype.
(gfc_simplify_ieee_functions): Add prototype.
* gfortran.dg/ieee/ieee_8.f90: New test.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@226723 138bc75d-0d04-0410-961f-82ee72b054a4