* trans-stmt.c (forall_info): Replace the next_nest and outer
fields that previously implemented a doubly-linked list with a
single prev_nest field (singly-linked list).
(gfc_trans_nested_forall_loop): The nested_forall_info argument
now denotes the innermost FORALL in the loop nest.
(compute_overall_iter_number): Use prev_nest instead of next_nest.
(gfc_trans_forall_1): Link/cons the new "info" to the head of the
nested_forall_info linked list. Free the current "info" when done.
* gfortran.dg/forall_7.f90: New test case.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@121236 138bc75d-0d04-0410-961f-82ee72b054a4