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[Patch, fortran] PR67171 - [6 regression] sourced allocation
- From: Paul Richard Thomas <paul dot richard dot thomas at gmail dot com>
- To: "fortran at gcc dot gnu dot org" <fortran at gcc dot gnu dot org>, gcc-patches <gcc-patches at gcc dot gnu dot org>
- Date: Sat, 24 Oct 2015 15:08:30 +0200
- Subject: [Patch, fortran] PR67171 - [6 regression] sourced allocation
- Authentication-results: sourceware.org; auth=none
Dear All,
This patch does four things:
(i) On deallocating class components, the vptr is set to point to the
vtable of the declared type;
(ii) When digging out the last class reference, a NULL is returned if
the allocatable component is to the right of a part reference with
non-zero rank, so that the resulting ICE is removed. The previous
modification takes care of these cases for gfc_reset_vptr and
gfc_reset_len;
(iii) gfc_reset_vptr has been simplified by the use of
gfc_get_vptr_from_expr; and
(iv) All variable expressions for the source are passed to
gfc_trans-assignment, so that array sections work correctly.
I see that Andre has already reserved the testcase
allocate_with_source_10, for the pending patch that I undertook to
review, so I will change this to #12 on submission
OK for trunk?
Cheers
Paul
2015-01-24 Paul Thomas <pault@gcc.gnu.org>
PR fortran/67171
* trans-array.c (structure_alloc_comps): On deallocation of
class components, reset the vptr to the declared type vtable
and reset the _len field of unlimited polymorphic components.
*trans-expr.c (gfc_find_and_cut_at_last_class_ref): Bail out on
allocatable component references to the right of part reference
with non-zero rank and return NULL.
(gfc_reset_vptr): Simplify this function by using the function
gfc_get_vptr_from_expr. Return if the vptr is NULL_TREE.
(gfc_reset_len): If gfc_find_and_cut_at_last_class_ref returns
NULL return.
* trans-stmt.c (gfc_trans_allocate): Rely on the use of
gfc_trans_assignment if expr3 is a variable expression since
this deals correctly with array sections.
2015-01-24 Paul Thomas <pault@gcc.gnu.org>
PR fortran/67171
* gfortran.dg/allocate_with_source_10.f03: New test