diff options
Diffstat (limited to 'gcc/f/com.c')
| -rw-r--r-- | gcc/f/com.c | 28 |
1 files changed, 15 insertions, 13 deletions
diff --git a/gcc/f/com.c b/gcc/f/com.c index 535ddbb87e8..a64ef86b172 100644 --- a/gcc/f/com.c +++ b/gcc/f/com.c @@ -638,15 +638,16 @@ static GTY(()) tree shadowed_labels; /* Return the subscript expression, modified to do range-checking. - `array' is the array to be checked against. + `array' is the array type to be checked against. `element' is the subscript expression to check. `dim' is the dimension number (starting at 0). `total_dims' is the total number of dimensions (0 for CHARACTER substring). + `item' is the array decl or NULL_TREE. */ static tree ffecom_subscript_check_ (tree array, tree element, int dim, int total_dims, - const char *array_name) + const char *array_name, tree item) { tree low = TYPE_MIN_VALUE (TYPE_DOMAIN (array)); tree high = TYPE_MAX_VALUE (TYPE_DOMAIN (array)); @@ -713,6 +714,10 @@ ffecom_subscript_check_ (tree array, tree element, int dim, int total_dims, } } + /* If the array index is safe at compile-time, return element. */ + if (integer_nonzerop (cond)) + return element; + { int len; char *proc; @@ -807,13 +812,10 @@ ffecom_subscript_check_ (tree array, tree element, int dim, int total_dims, TREE_SIDE_EFFECTS (die) = 1; die = convert (void_type_node, die); - element = ffecom_3 (COND_EXPR, - TREE_TYPE (element), - cond, - element, - die); + if (integer_zerop (cond) && item) + ffe_mark_addressable (item); - return element; + return ffecom_3 (COND_EXPR, TREE_TYPE (element), cond, element, die); } /* Return the computed element of an array reference. @@ -899,7 +901,7 @@ ffecom_arrayref_ (tree item, ffebld expr, int want_ptr) element = ffecom_expr_ (dims[i], NULL, NULL, NULL, FALSE, TRUE); if (flag_bounds_check) element = ffecom_subscript_check_ (array, element, i, total_dims, - array_name); + array_name, item); if (element == error_mark_node) return element; @@ -945,7 +947,7 @@ ffecom_arrayref_ (tree item, ffebld expr, int want_ptr) element = ffecom_expr_ (dims[i], NULL, NULL, NULL, FALSE, TRUE); if (flag_bounds_check) element = ffecom_subscript_check_ (array, element, i, total_dims, - array_name); + array_name, item); if (element == error_mark_node) return element; @@ -2037,7 +2039,7 @@ ffecom_char_args_x_ (tree *xitem, tree *length, ffebld expr, bool with_null) end_tree = ffecom_expr (end); if (flag_bounds_check) end_tree = ffecom_subscript_check_ (array, end_tree, 1, 0, - char_name); + char_name, NULL_TREE); end_tree = convert (ffecom_f2c_ftnlen_type_node, end_tree); @@ -2055,7 +2057,7 @@ ffecom_char_args_x_ (tree *xitem, tree *length, ffebld expr, bool with_null) start_tree = ffecom_expr (start); if (flag_bounds_check) start_tree = ffecom_subscript_check_ (array, start_tree, 0, 0, - char_name); + char_name, NULL_TREE); start_tree = convert (ffecom_f2c_ftnlen_type_node, start_tree); @@ -2088,7 +2090,7 @@ ffecom_char_args_x_ (tree *xitem, tree *length, ffebld expr, bool with_null) end_tree = ffecom_expr (end); if (flag_bounds_check) end_tree = ffecom_subscript_check_ (array, end_tree, 1, 0, - char_name); + char_name, NULL_TREE); end_tree = convert (ffecom_f2c_ftnlen_type_node, end_tree); |