diff options
Diffstat (limited to 'gcc/fortran')
| -rw-r--r-- | gcc/fortran/ChangeLog | 8 | ||||
| -rw-r--r-- | gcc/fortran/dependency.c | 11 |
2 files changed, 16 insertions, 3 deletions
diff --git a/gcc/fortran/ChangeLog b/gcc/fortran/ChangeLog index 7c4a2c4..b9706f4 100644 --- a/gcc/fortran/ChangeLog +++ b/gcc/fortran/ChangeLog @@ -1,3 +1,11 @@ +2014-08-30 Tobias Burnus <burnus@net-b.de> + + PR fortran/62278 + PR fortran/44735 + PR fortran/60593 + * dependency.c (gfc_check_dependency): Allow for optimizations + in the pointer-alias check. + 2014-08-30 Janne Blomqvist <jb@gcc.gnu.org> * module.c (gfc_dump_module): Use ISO C remove() instead of POSIX diff --git a/gcc/fortran/dependency.c b/gcc/fortran/dependency.c index c18482a..367b323 100644 --- a/gcc/fortran/dependency.c +++ b/gcc/fortran/dependency.c @@ -1269,6 +1269,7 @@ gfc_check_dependency (gfc_expr *expr1, gfc_expr *expr2, bool identical) /* The interesting cases are when the symbols don't match. */ if (expr1->symtree->n.sym != expr2->symtree->n.sym) { + symbol_attribute attr1, attr2; gfc_typespec *ts1 = &expr1->symtree->n.sym->ts; gfc_typespec *ts2 = &expr2->symtree->n.sym->ts; @@ -1284,9 +1285,13 @@ gfc_check_dependency (gfc_expr *expr1, gfc_expr *expr2, bool identical) return 0; } - /* If either variable is a pointer, assume the worst. */ - /* TODO: -fassume-no-pointer-aliasing */ - if (gfc_is_data_pointer (expr1) || gfc_is_data_pointer (expr2)) + /* We have to also include target-target as ptr%comp is not a + pointer but it still alias with "dt%comp" for "ptr => dt". As + subcomponents and array access to pointers retains the target + attribute, that's sufficient. */ + attr1 = gfc_expr_attr (expr1); + attr2 = gfc_expr_attr (expr2); + if ((attr1.pointer || attr1.target) && (attr2.pointer || attr2.target)) { if (check_data_pointer_types (expr1, expr2) && check_data_pointer_types (expr2, expr1)) |