}
iter_info;
-typedef struct temporary_list
-{
- tree temporary;
- struct temporary_list *next;
-}
-temporary_list;
-
typedef struct forall_info
{
iter_info *this_loop;
}
forall_info;
-static void gfc_trans_where_2 (gfc_code *, tree, tree, forall_info *,
- stmtblock_t *, temporary_list **temp);
+static void gfc_trans_where_2 (gfc_code *, tree, bool,
+ forall_info *, stmtblock_t *);
/* Translate a F95 label number to a LABEL_EXPR. */
static tree
generate_loop_for_temp_to_lhs (gfc_expr *expr, tree tmp1, tree count3,
- tree count1, tree wheremask)
+ tree count1, tree wheremask, bool invert)
{
gfc_ss *lss;
gfc_se lse, rse;
stmtblock_t block, body;
gfc_loopinfo loop1;
- tree tmp, tmp2;
+ tree tmp;
tree wheremaskexpr;
/* Walk the lhs. */
/* Use the scalar assignment. */
tmp = gfc_trans_scalar_assign (&lse, &rse, expr->ts.type);
- /* Form the mask expression according to the mask tree list. */
- if (wheremask)
- {
- wheremaskexpr = gfc_build_array_ref (wheremask, count3);
- tmp2 = TREE_CHAIN (wheremask);
- while (tmp2)
- {
- tmp1 = gfc_build_array_ref (tmp2, count3);
- wheremaskexpr = fold_build2 (TRUTH_AND_EXPR, TREE_TYPE (tmp1),
- wheremaskexpr, tmp1);
- tmp2 = TREE_CHAIN (tmp2);
- }
- tmp = fold_build3 (COND_EXPR, void_type_node,
- wheremaskexpr, tmp, build_empty_stmt ());
+ /* Form the mask expression according to the mask tree list. */
+ if (wheremask)
+ {
+ wheremaskexpr = gfc_build_array_ref (wheremask, count3);
+ if (invert)
+ wheremaskexpr = fold_build1 (TRUTH_NOT_EXPR,
+ TREE_TYPE (wheremaskexpr),
+ wheremaskexpr);
+ tmp = fold_build3 (COND_EXPR, void_type_node,
+ wheremaskexpr, tmp, build_empty_stmt ());
}
gfc_add_expr_to_block (&body, tmp);
}
-/* Generate codes to copy rhs to the temporary. TMP1 is the address of temporary
- LSS and RSS are formed in function compute_inner_temp_size(), and should
- not be freed. */
+/* Generate codes to copy rhs to the temporary. TMP1 is the address of
+ temporary, LSS and RSS are formed in function compute_inner_temp_size(),
+ and should not be freed. WHEREMASK is the conditional execution mask
+ whose sense may be inverted by INVERT. */
static tree
generate_loop_for_rhs_to_temp (gfc_expr *expr2, tree tmp1, tree count3,
tree count1, gfc_ss *lss, gfc_ss *rss,
- tree wheremask)
+ tree wheremask, bool invert)
{
stmtblock_t block, body1;
gfc_loopinfo loop;
gfc_se lse;
gfc_se rse;
- tree tmp, tmp2;
+ tree tmp;
tree wheremaskexpr;
gfc_start_block (&block);
if (wheremask)
{
wheremaskexpr = gfc_build_array_ref (wheremask, count3);
- tmp2 = TREE_CHAIN (wheremask);
- while (tmp2)
- {
- tmp1 = gfc_build_array_ref (tmp2, count3);
- wheremaskexpr = fold_build2 (TRUTH_AND_EXPR, TREE_TYPE (tmp1),
- wheremaskexpr, tmp1);
- tmp2 = TREE_CHAIN (tmp2);
- }
+ if (invert)
+ wheremaskexpr = fold_build1 (TRUTH_NOT_EXPR,
+ TREE_TYPE (wheremaskexpr),
+ wheremaskexpr);
tmp = fold_build3 (COND_EXPR, void_type_node,
wheremaskexpr, tmp, build_empty_stmt ());
}
DEALLOCATE (tmp)
*/
static void
-gfc_trans_assign_need_temp (gfc_expr * expr1, gfc_expr * expr2, tree wheremask,
+gfc_trans_assign_need_temp (gfc_expr * expr1, gfc_expr * expr2,
+ tree wheremask, bool invert,
forall_info * nested_forall_info,
stmtblock_t * block)
{
/* Generate codes to copy rhs to the temporary . */
tmp = generate_loop_for_rhs_to_temp (expr2, tmp1, count, count1, lss, rss,
- wheremask);
+ wheremask, invert);
/* Generate body and loops according to the information in
nested_forall_info. */
gfc_add_modify_expr (block, count, gfc_index_zero_node);
/* Generate codes to copy the temporary to lhs. */
- tmp = generate_loop_for_temp_to_lhs (expr1, tmp1, count, count1, wheremask);
+ tmp = generate_loop_for_temp_to_lhs (expr1, tmp1, count, count1,
+ wheremask, invert);
/* Generate body and loops according to the information in
nested_forall_info. */
gfc_saved_var *saved_vars;
iter_info *this_forall, *iter_tmp;
forall_info *info, *forall_tmp;
- temporary_list *temp;
gfc_start_block (&block);
/* Temporaries due to array assignment data dependencies introduce
no end of problems. */
if (need_temp)
- gfc_trans_assign_need_temp (c->expr, c->expr2, NULL,
+ gfc_trans_assign_need_temp (c->expr, c->expr2, NULL, false,
nested_forall_info, &block);
else
{
break;
case EXEC_WHERE:
-
/* Translate WHERE or WHERE construct nested in FORALL. */
- temp = NULL;
- gfc_trans_where_2 (c, NULL, NULL, nested_forall_info, &block, &temp);
-
- while (temp)
- {
- tree args;
- temporary_list *p;
-
- /* Free the temporary. */
- args = gfc_chainon_list (NULL_TREE, temp->temporary);
- tmp = build_function_call_expr (gfor_fndecl_internal_free, args);
- gfc_add_expr_to_block (&block, tmp);
-
- p = temp;
- temp = temp->next;
- gfc_free (p);
- }
-
- break;
+ gfc_trans_where_2 (c, NULL, false, nested_forall_info, &block);
+ break;
/* Pointer assignment inside FORALL. */
case EXEC_POINTER_ASSIGN:
needed by the WHERE mask expression multiplied by the iterator number of
the nested forall.
ME is the WHERE mask expression.
- MASK is the temporary which value is mask's value.
- NMASK is another temporary which value is !mask.
- TEMP records the temporary's address allocated in this function in order to
- free them outside this function.
- MASK, NMASK and TEMP are all OUT arguments. */
+ MASK is the current execution mask upon input, whose sense may or may
+ not be inverted as specified by the INVERT argument.
+ CMASK is the updated execution mask on output, or NULL if not required.
+ PMASK is the pending execution mask on output, or NULL if not required.
+ BLOCK is the block in which to place the condition evaluation loops. */
-static tree
+static void
gfc_evaluate_where_mask (gfc_expr * me, forall_info * nested_forall_info,
- tree * mask, tree * nmask, temporary_list ** temp,
- stmtblock_t * block)
+ tree mask, bool invert, tree cmask, tree pmask,
+ tree mask_type, stmtblock_t * block)
{
tree tmp, tmp1;
gfc_ss *lss, *rss;
gfc_loopinfo loop;
- tree ptemp1, ntmp, ptemp2;
- tree inner_size, size;
- stmtblock_t body, body1, inner_size_body;
+ stmtblock_t body, body1;
+ tree count, cond, mtmp;
gfc_se lse, rse;
- tree mask_type;
- tree count;
- tree tmpexpr;
gfc_init_loopinfo (&loop);
- /* Calculate the size of temporary needed by the mask-expr. */
- gfc_init_block (&inner_size_body);
- inner_size = compute_inner_temp_size (me, me, &inner_size_body, &lss, &rss);
-
- /* Calculate the total size of temporary needed. */
- size = compute_overall_iter_number (nested_forall_info, inner_size,
- &inner_size_body, block);
-
- /* As the mask array can be very big, prefer compact boolean types. */
- mask_type = gfc_get_logical_type (gfc_logical_kinds[0].kind);
-
- /* Allocate temporary for where mask. */
- tmp = allocate_temp_for_forall_nest_1 (mask_type, size, block, &ptemp1);
-
- /* Record the temporary address in order to free it later. */
- if (ptemp1)
- {
- temporary_list *tempo;
- tempo = (temporary_list *) gfc_getmem (sizeof (temporary_list));
- tempo->temporary = ptemp1;
- tempo->next = *temp;
- *temp = tempo;
- }
-
- /* Allocate temporary for !mask. */
- ntmp = allocate_temp_for_forall_nest_1 (mask_type, size, block, &ptemp2);
-
- /* Record the temporary in order to free it later. */
- if (ptemp2)
- {
- temporary_list *tempo;
- tempo = (temporary_list *) gfc_getmem (sizeof (temporary_list));
- tempo->temporary = ptemp2;
- tempo->next = *temp;
- *temp = tempo;
- }
+ lss = gfc_walk_expr (me);
+ rss = gfc_walk_expr (me);
/* Variable to index the temporary. */
count = gfc_create_var (gfc_array_index_type, "count");
rse.ss = rss;
gfc_conv_expr (&rse, me);
}
- /* Form the expression of the temporary. */
- lse.expr = gfc_build_array_ref (tmp, count);
- tmpexpr = gfc_build_array_ref (ntmp, count);
- /* Use the scalar assignment to fill temporary TMP. */
- tmp1 = gfc_trans_scalar_assign (&lse, &rse, me->ts.type);
- gfc_add_expr_to_block (&body1, tmp1);
+ /* Variable to evalate mask condition. */
+ cond = gfc_create_var (mask_type, "cond");
+ if (mask && (cmask || pmask))
+ mtmp = gfc_create_var (mask_type, "mask");
+ else mtmp = NULL_TREE;
+
+ gfc_add_block_to_block (&body1, &lse.pre);
+ gfc_add_block_to_block (&body1, &rse.pre);
+
+ gfc_add_modify_expr (&body1, cond, fold_convert (mask_type, rse.expr));
+
+ if (mask && (cmask || pmask))
+ {
+ tmp = gfc_build_array_ref (mask, count);
+ if (invert)
+ tmp = fold_build1 (TRUTH_NOT_EXPR, mask_type, tmp);
+ gfc_add_modify_expr (&body1, mtmp, tmp);
+ }
+
+ if (cmask)
+ {
+ tmp1 = gfc_build_array_ref (cmask, count);
+ tmp = cond;
+ if (mask)
+ tmp = build2 (TRUTH_AND_EXPR, mask_type, mtmp, tmp);
+ gfc_add_modify_expr (&body1, tmp1, tmp);
+ }
+
+ if (pmask)
+ {
+ tmp1 = gfc_build_array_ref (pmask, count);
+ tmp = build1 (TRUTH_NOT_EXPR, mask_type, cond);
+ if (mask)
+ tmp = build2 (TRUTH_AND_EXPR, mask_type, mtmp, tmp);
+ gfc_add_modify_expr (&body1, tmp1, tmp);
+ }
- /* Fill temporary NTMP. */
- tmp1 = build1 (TRUTH_NOT_EXPR, TREE_TYPE (lse.expr), lse.expr);
- gfc_add_modify_expr (&body1, tmpexpr, tmp1);
+ gfc_add_block_to_block (&body1, &lse.post);
+ gfc_add_block_to_block (&body1, &rse.post);
- if (lss == gfc_ss_terminator)
+ if (lss == gfc_ss_terminator)
{
gfc_add_block_to_block (&body, &body1);
}
tmp1 = gfc_trans_nested_forall_loop (nested_forall_info, tmp1, 1, 1);
gfc_add_expr_to_block (block, tmp1);
-
- *mask = tmp;
- *nmask = ntmp;
-
- return tmp1;
}
/* Translate an assignment statement in a WHERE statement or construct
statement. The MASK expression is used to control which elements
- of EXPR1 shall be assigned. */
+ of EXPR1 shall be assigned. The sense of MASK is specified by
+ INVERT. */
static tree
-gfc_trans_where_assign (gfc_expr *expr1, gfc_expr *expr2, tree mask,
+gfc_trans_where_assign (gfc_expr *expr1, gfc_expr *expr2,
+ tree mask, bool invert,
tree count1, tree count2)
{
gfc_se lse;
tree tmp;
stmtblock_t block;
stmtblock_t body;
- tree index, maskexpr, tmp1;
+ tree index, maskexpr;
#if 0
/* TODO: handle this special case.
else
gfc_conv_expr (&lse, expr1);
- /* Form the mask expression according to the mask tree list. */
+ /* Form the mask expression according to the mask. */
index = count1;
- tmp = mask;
- if (tmp != NULL)
- maskexpr = gfc_build_array_ref (tmp, index);
- else
- maskexpr = NULL;
+ maskexpr = gfc_build_array_ref (mask, index);
+ if (invert)
+ maskexpr = fold_build1 (TRUTH_NOT_EXPR, TREE_TYPE (maskexpr), maskexpr);
- tmp = TREE_CHAIN (tmp);
- while (tmp)
- {
- tmp1 = gfc_build_array_ref (tmp, index);
- maskexpr = build2 (TRUTH_AND_EXPR, TREE_TYPE (tmp1), maskexpr, tmp1);
- tmp = TREE_CHAIN (tmp);
- }
/* Use the scalar assignment as is. */
tmp = gfc_trans_scalar_assign (&lse, &rse, expr1->ts.type);
tmp = build3_v (COND_EXPR, maskexpr, tmp, build_empty_stmt ());
/* Form the mask expression according to the mask tree list. */
index = count2;
- tmp = mask;
- if (tmp != NULL)
- maskexpr = gfc_build_array_ref (tmp, index);
- else
- maskexpr = NULL;
+ maskexpr = gfc_build_array_ref (mask, index);
+ if (invert)
+ maskexpr = fold_build1 (TRUTH_NOT_EXPR, TREE_TYPE (maskexpr),
+ maskexpr);
- tmp = TREE_CHAIN (tmp);
- while (tmp)
- {
- tmp1 = gfc_build_array_ref (tmp, index);
- maskexpr = build2 (TRUTH_AND_EXPR, TREE_TYPE (tmp1),
- maskexpr, tmp1);
- tmp = TREE_CHAIN (tmp);
- }
/* Use the scalar assignment as is. */
tmp = gfc_trans_scalar_assign (&lse, &rse, expr1->ts.type);
tmp = build3_v (COND_EXPR, maskexpr, tmp, build_empty_stmt ());
/* Translate the WHERE construct or statement.
This function can be called iteratively to translate the nested WHERE
construct or statement.
- MASK is the control mask, and PMASK is the pending control mask.
- TEMP records the temporary address which must be freed later. */
+ MASK is the control mask. */
static void
-gfc_trans_where_2 (gfc_code * code, tree mask, tree pmask,
- forall_info * nested_forall_info, stmtblock_t * block,
- temporary_list ** temp)
+gfc_trans_where_2 (gfc_code * code, tree mask, bool invert,
+ forall_info * nested_forall_info, stmtblock_t * block)
{
+ stmtblock_t inner_size_body;
+ tree inner_size, size;
+ gfc_ss *lss, *rss;
+ tree mask_type;
gfc_expr *expr1;
gfc_expr *expr2;
gfc_code *cblock;
gfc_code *cnext;
- tree tmp, tmp1, tmp2;
+ tree tmp;
tree count1, count2;
- tree mask_copy;
+ bool need_cmask;
+ bool need_pmask;
int need_temp;
+ tree pcmask = NULL_TREE;
+ tree ppmask = NULL_TREE;
+ tree cmask = NULL_TREE;
+ tree pmask = NULL_TREE;
/* the WHERE statement or the WHERE construct statement. */
cblock = code->block;
+
+ /* As the mask array can be very big, prefer compact boolean types. */
+ mask_type = gfc_get_logical_type (gfc_logical_kinds[0].kind);
+
+ /* Determine which temporary masks are needed. */
+ if (!cblock->block)
+ {
+ /* One clause: No ELSEWHEREs. */
+ need_cmask = (cblock->next != 0);
+ need_pmask = false;
+ }
+ else if (cblock->block->block)
+ {
+ /* Three or more clauses: Conditional ELSEWHEREs. */
+ need_cmask = true;
+ need_pmask = true;
+ }
+ else if (cblock->next)
+ {
+ /* Two clauses, the first non-empty. */
+ need_cmask = true;
+ need_pmask = (mask != NULL_TREE
+ && cblock->block->next != 0);
+ }
+ else if (!cblock->block->next)
+ {
+ /* Two clauses, both empty. */
+ need_cmask = false;
+ need_pmask = false;
+ }
+ /* Two clauses, the first empty, the second non-empty. */
+ else if (mask)
+ {
+ need_cmask = (cblock->block->expr != 0);
+ need_pmask = true;
+ }
+ else
+ {
+ need_cmask = true;
+ need_pmask = false;
+ }
+
+ if (need_cmask || need_pmask)
+ {
+ /* Calculate the size of temporary needed by the mask-expr. */
+ gfc_init_block (&inner_size_body);
+ inner_size = compute_inner_temp_size (cblock->expr, cblock->expr,
+ &inner_size_body, &lss, &rss);
+
+ /* Calculate the total size of temporary needed. */
+ size = compute_overall_iter_number (nested_forall_info, inner_size,
+ &inner_size_body, block);
+
+ /* Allocate temporary for WHERE mask if needed. */
+ if (need_cmask)
+ cmask = allocate_temp_for_forall_nest_1 (mask_type, size, block,
+ &pcmask);
+
+ /* Allocate temporary for !mask if needed. */
+ if (need_pmask)
+ pmask = allocate_temp_for_forall_nest_1 (mask_type, size, block,
+ &ppmask);
+ }
+
while (cblock)
{
+ /* Each time around this loop, the where clause is conditional
+ on the value of mask and invert, which are updated at the
+ bottom of the loop. */
+
/* Has mask-expr. */
if (cblock->expr)
{
- /* Ensure that the WHERE mask be evaluated only once. */
- tmp2 = gfc_evaluate_where_mask (cblock->expr, nested_forall_info,
- &tmp, &tmp1, temp, block);
-
- /* Set the control mask and the pending control mask. */
- /* It's a where-stmt. */
- if (mask == NULL)
- {
- mask = tmp;
- pmask = tmp1;
- }
- /* It's a nested where-stmt. */
- else if (mask && pmask == NULL)
- {
- tree tmp2;
- /* Use the TREE_CHAIN to list the masks. */
- tmp2 = copy_list (mask);
- pmask = chainon (mask, tmp1);
- mask = chainon (tmp2, tmp);
- }
- /* It's a masked-elsewhere-stmt. */
- else if (mask && cblock->expr)
- {
- tree tmp2;
- tmp2 = copy_list (pmask);
+ /* Ensure that the WHERE mask will be evaluated exactly once.
+ If there are no statements in this WHERE/ELSEWHERE clause,
+ then we don't need to update the control mask (cmask).
+ If this is the last clause of the WHERE construct, then
+ we don't need to update the pending control mask (pmask). */
+ if (mask)
+ gfc_evaluate_where_mask (cblock->expr, nested_forall_info,
+ mask, invert,
+ cblock->next ? cmask : NULL_TREE,
+ cblock->block ? pmask : NULL_TREE,
+ mask_type, block);
+ else
+ gfc_evaluate_where_mask (cblock->expr, nested_forall_info,
+ NULL_TREE, false,
+ (cblock->next || cblock->block)
+ ? cmask : NULL_TREE,
+ NULL_TREE, mask_type, block);
- mask = pmask;
- tmp2 = chainon (tmp2, tmp);
- pmask = chainon (mask, tmp1);
- mask = tmp2;
- }
+ invert = false;
}
- /* It's a elsewhere-stmt. No mask-expr is present. */
+ /* It's a final elsewhere-stmt. No mask-expr is present. */
else
- mask = pmask;
+ cmask = mask;
+
+ /* The body of this where clause are controlled by cmask with
+ sense specified by invert. */
/* Get the assignment statement of a WHERE statement, or the first
statement in where-body-construct of a WHERE construct. */
{
need_temp = gfc_check_dependency (expr1, expr2, 0);
if (need_temp)
- gfc_trans_assign_need_temp (expr1, expr2, mask,
+ gfc_trans_assign_need_temp (expr1, expr2,
+ cmask, invert,
nested_forall_info, block);
else
{
gfc_add_modify_expr (block, count1, gfc_index_zero_node);
gfc_add_modify_expr (block, count2, gfc_index_zero_node);
- tmp = gfc_trans_where_assign (expr1, expr2, mask, count1,
- count2);
+ tmp = gfc_trans_where_assign (expr1, expr2,
+ cmask, invert,
+ count1, count2);
tmp = gfc_trans_nested_forall_loop (nested_forall_info,
tmp, 1, 1);
gfc_add_modify_expr (block, count1, gfc_index_zero_node);
gfc_add_modify_expr (block, count2, gfc_index_zero_node);
- tmp = gfc_trans_where_assign (expr1, expr2, mask, count1,
- count2);
+ tmp = gfc_trans_where_assign (expr1, expr2,
+ cmask, invert,
+ count1, count2);
gfc_add_expr_to_block (block, tmp);
}
/* WHERE or WHERE construct is part of a where-body-construct. */
case EXEC_WHERE:
- /* Ensure that MASK is not modified by next gfc_trans_where_2. */
- mask_copy = copy_list (mask);
- gfc_trans_where_2 (cnext, mask_copy, NULL, nested_forall_info,
- block, temp);
- break;
+ gfc_trans_where_2 (cnext, cmask, invert,
+ nested_forall_info, block);
+ break;
default:
gcc_unreachable ();
}
/* The next masked-elsewhere-stmt, elsewhere-stmt, or end-where-stmt. */
cblock = cblock->block;
+ if (mask == NULL_TREE)
+ {
+ /* If we're the initial WHERE, we can simply invert the sense
+ of the current mask to obtain the "mask" for the remaining
+ ELSEWHEREs. */
+ invert = true;
+ mask = cmask;
+ }
+ else
+ {
+ /* Otherwise, for nested WHERE's we need to use the pending mask. */
+ invert = false;
+ mask = pmask;
+ }
}
+
+ /* If we allocated a pending mask array, deallocate it now. */
+ if (ppmask)
+ {
+ tree args = gfc_chainon_list (NULL_TREE, ppmask);
+ tmp = build_function_call_expr (gfor_fndecl_internal_free, args);
+ gfc_add_expr_to_block (block, tmp);
+ }
+
+ /* If we allocated a current mask array, deallocate it now. */
+ if (pcmask)
+ {
+ tree args = gfc_chainon_list (NULL_TREE, pcmask);
+ tmp = build_function_call_expr (gfor_fndecl_internal_free, args);
+ gfc_add_expr_to_block (block, tmp);
+ }
}
/* Translate a simple WHERE construct or statement without dependencies.
gfc_trans_where (gfc_code * code)
{
stmtblock_t block;
- temporary_list *temp, *p;
gfc_code *cblock;
gfc_code *eblock;
- tree args;
- tree tmp;
cblock = code->block;
if (cblock->next
}
gfc_start_block (&block);
- temp = NULL;
- gfc_trans_where_2 (code, NULL, NULL, NULL, &block, &temp);
+ gfc_trans_where_2 (code, NULL, false, NULL, &block);
- /* Add calls to free temporaries which were dynamically allocated. */
- while (temp)
- {
- args = gfc_chainon_list (NULL_TREE, temp->temporary);
- tmp = build_function_call_expr (gfor_fndecl_internal_free, args);
- gfc_add_expr_to_block (&block, tmp);
-
- p = temp;
- temp = temp->next;
- gfc_free (p);
- }
return gfc_finish_block (&block);
}
gfc_add_modify_expr (&se.pre, val, tmp);
tmp = TYPE_SIZE_UNIT (TREE_TYPE (TREE_TYPE (se.expr)));
+
+ if (expr->ts.type == BT_CHARACTER && tmp == NULL_TREE)
+ tmp = se.string_length;
+
parm = gfc_chainon_list (NULL_TREE, val);
parm = gfc_chainon_list (parm, tmp);
parm = gfc_chainon_list (parm, pstat);
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