gfc_set_loop_bounds_from_array_spec (gfc_interface_mapping * mapping,
gfc_se * se, gfc_array_spec * as)
{
- int n, dim;
+ int n, dim, total_dim;
gfc_se tmpse;
+ gfc_ss *ss;
tree lower;
tree upper;
tree tmp;
- if (as && as->type == AS_EXPLICIT)
- for (n = 0; n < se->loop->dimen; n++)
- {
- dim = se->ss->dim[n];
- gcc_assert (dim < as->rank);
- gcc_assert (se->loop->dimen == as->rank);
- if (se->loop->to[n] == NULL_TREE)
- {
- /* Evaluate the lower bound. */
- gfc_init_se (&tmpse, NULL);
- gfc_apply_interface_mapping (mapping, &tmpse, as->lower[dim]);
- gfc_add_block_to_block (&se->pre, &tmpse.pre);
- gfc_add_block_to_block (&se->post, &tmpse.post);
- lower = fold_convert (gfc_array_index_type, tmpse.expr);
-
- /* ...and the upper bound. */
- gfc_init_se (&tmpse, NULL);
- gfc_apply_interface_mapping (mapping, &tmpse, as->upper[dim]);
- gfc_add_block_to_block (&se->pre, &tmpse.pre);
- gfc_add_block_to_block (&se->post, &tmpse.post);
- upper = fold_convert (gfc_array_index_type, tmpse.expr);
-
- /* Set the upper bound of the loop to UPPER - LOWER. */
- tmp = fold_build2_loc (input_location, MINUS_EXPR,
- gfc_array_index_type, upper, lower);
- tmp = gfc_evaluate_now (tmp, &se->pre);
- se->loop->to[n] = tmp;
- }
- }
+ total_dim = 0;
+
+ if (!as || as->type != AS_EXPLICIT)
+ return;
+
+ for (ss = se->ss; ss; ss = ss->parent)
+ {
+ total_dim += ss->loop->dimen;
+ for (n = 0; n < ss->loop->dimen; n++)
+ {
+ /* The bound is known, nothing to do. */
+ if (ss->loop->to[n] != NULL_TREE)
+ continue;
+
+ dim = ss->dim[n];
+ gcc_assert (dim < as->rank);
+ gcc_assert (ss->loop->dimen <= as->rank);
+
+ /* Evaluate the lower bound. */
+ gfc_init_se (&tmpse, NULL);
+ gfc_apply_interface_mapping (mapping, &tmpse, as->lower[dim]);
+ gfc_add_block_to_block (&se->pre, &tmpse.pre);
+ gfc_add_block_to_block (&se->post, &tmpse.post);
+ lower = fold_convert (gfc_array_index_type, tmpse.expr);
+
+ /* ...and the upper bound. */
+ gfc_init_se (&tmpse, NULL);
+ gfc_apply_interface_mapping (mapping, &tmpse, as->upper[dim]);
+ gfc_add_block_to_block (&se->pre, &tmpse.pre);
+ gfc_add_block_to_block (&se->post, &tmpse.post);
+ upper = fold_convert (gfc_array_index_type, tmpse.expr);
+
+ /* Set the upper bound of the loop to UPPER - LOWER. */
+ tmp = fold_build2_loc (input_location, MINUS_EXPR,
+ gfc_array_index_type, upper, lower);
+ tmp = gfc_evaluate_now (tmp, &se->pre);
+ ss->loop->to[n] = tmp;
+ }
+ }
+
+ gcc_assert (total_dim == as->rank);
}
}
-/* Get the array reference dimension corresponding to the given loop dimension.
- It is different from the true array dimension given by the dim array in
- the case of a partial array reference
- It is different from the loop dimension in the case of a transposed array.
- */
+/* Get the scalarizer array dimension corresponding to actual array dimension
+ given by ARRAY_DIM.
+
+ For example, if SS represents the array ref a(1,:,:,1), it is a
+ bidimensional scalarizer array, and the result would be 0 for ARRAY_DIM=1,
+ and 1 for ARRAY_DIM=2.
+ If SS represents transpose(a(:,1,1,:)), it is again a bidimensional
+ scalarizer array, and the result would be 1 for ARRAY_DIM=0 and 0 for
+ ARRAY_DIM=3.
+ If SS represents sum(a(:,:,:,1), dim=1), it is a 2+1-dimensional scalarizer
+ array. If called on the inner ss, the result would be respectively 0,1,2 for
+ ARRAY_DIM=0,1,2. If called on the outer ss, the result would be 0,1
+ for ARRAY_DIM=1,2. */
static int
-get_array_ref_dim (gfc_ss *ss, int loop_dim)
+get_scalarizer_dim_for_array_dim (gfc_ss *ss, int array_dim)
{
- int n, array_dim, array_ref_dim;
+ int array_ref_dim;
+ int n;
array_ref_dim = 0;
- array_dim = ss->dim[loop_dim];
- for (n = 0; n < ss->dimen; n++)
- if (ss->dim[n] < array_dim)
- array_ref_dim++;
+ for (; ss; ss = ss->parent)
+ for (n = 0; n < ss->dimen; n++)
+ if (ss->dim[n] < array_dim)
+ array_ref_dim++;
return array_ref_dim;
}
+static gfc_ss *
+innermost_ss (gfc_ss *ss)
+{
+ while (ss->nested_ss != NULL)
+ ss = ss->nested_ss;
+
+ return ss;
+}
+
+
+
+/* Get the array reference dimension corresponding to the given loop dimension.
+ It is different from the true array dimension given by the dim array in
+ the case of a partial array reference (i.e. a(:,:,1,:) for example)
+ It is different from the loop dimension in the case of a transposed array.
+ */
+
+static int
+get_array_ref_dim_for_loop_dim (gfc_ss *ss, int loop_dim)
+{
+ return get_scalarizer_dim_for_array_dim (innermost_ss (ss),
+ ss->dim[loop_dim]);
+}
+
+
/* Generate code to create and initialize the descriptor for a temporary
array. This is used for both temporaries needed by the scalarizer, and
functions returning arrays. Adjusts the loop variables to be
to the n'th dimension of the array. We need to reconstruct loop infos
in the right order before using it to set the descriptor
bounds. */
- tmp_dim = get_array_ref_dim (ss, n);
+ tmp_dim = get_scalarizer_dim_for_array_dim (ss, dim);
from[tmp_dim] = loop->from[n];
to[tmp_dim] = loop->to[n];
{
for (n = 0; n < loop->dimen; n++)
{
- dim = ss->dim[n];
+ dim = get_scalarizer_dim_for_array_dim (ss, ss->dim[n]);
/* For a callee allocated array express the loop bounds in terms
of the descriptor fields. */
}
}
+
/* Helper routine of gfc_trans_array_constructor to determine if the
bounds of the loop specified by LOOP are constant and simple enough
to use with trans_constant_array_constructor. Returns the
gfc_loopinfo *loop;
gfc_ss_info *ss_info;
gfc_expr *expr;
+ gfc_ss *s;
/* Save the old values for nested checking. */
old_first_len = first_len;
if (expr->shape && loop->dimen > 1 && loop->to[0] == NULL_TREE)
{
/* We have a multidimensional parameter. */
- int n;
- for (n = 0; n < expr->rank; n++)
- {
- loop->from[n] = gfc_index_zero_node;
- loop->to[n] = gfc_conv_mpz_to_tree (expr->shape [n],
- gfc_index_integer_kind);
- loop->to[n] = fold_build2_loc (input_location, MINUS_EXPR,
- gfc_array_index_type,
- loop->to[n], gfc_index_one_node);
- }
+ for (s = ss; s; s = s->parent)
+ {
+ int n;
+ for (n = 0; n < s->loop->dimen; n++)
+ {
+ s->loop->from[n] = gfc_index_zero_node;
+ s->loop->to[n] = gfc_conv_mpz_to_tree (expr->shape[s->dim[n]],
+ gfc_index_integer_kind);
+ s->loop->to[n] = fold_build2_loc (input_location, MINUS_EXPR,
+ gfc_array_index_type,
+ s->loop->to[n],
+ gfc_index_one_node);
+ }
+ }
}
if (loop->to[0] == NULL_TREE)
int dim;
info = &ss->info->data.array;
- loop = ss->loop;
- for (n = 0; n < loop->dimen; n++)
+ for (; ss; ss = ss->parent)
{
- dim = ss->dim[n];
- if (info->ref->u.ar.dimen_type[dim] == DIMEN_VECTOR
- && loop->to[n] == NULL)
+ loop = ss->loop;
+
+ for (n = 0; n < loop->dimen; n++)
{
+ dim = ss->dim[n];
+ if (info->ref->u.ar.dimen_type[dim] != DIMEN_VECTOR
+ || loop->to[n] != NULL)
+ continue;
+
/* Loop variable N indexes vector dimension DIM, and we don't
yet know the upper bound of loop variable N. Set it to the
difference between the vector's upper and lower bounds. */
/* Clear all the used flags. */
for (ss = loop->ss; ss != gfc_ss_terminator; ss = ss->loop_chain)
- ss->info->useflags = 0;
+ if (ss->parent == NULL)
+ ss->info->useflags = 0;
}
&& INTEGER_CST_P (info->stride[dim]))
{
loop->from[n] = info->start[dim];
- mpz_set (i, cshape[get_array_ref_dim (loopspec[n], n)]);
+ mpz_set (i, cshape[get_array_ref_dim_for_loop_dim (loopspec[n], n)]);
mpz_sub_ui (i, i, 1);
/* To = from + (size - 1) * stride. */
tmp = gfc_conv_mpz_to_tree (i, gfc_index_integer_kind);
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