diff options
Diffstat (limited to 'gcc/fortran/dependency.c')
| -rw-r--r-- | gcc/fortran/dependency.c | 37 |
1 files changed, 34 insertions, 3 deletions
diff --git a/gcc/fortran/dependency.c b/gcc/fortran/dependency.c index f9b975ad9c5..3c7d57913c3 100644 --- a/gcc/fortran/dependency.c +++ b/gcc/fortran/dependency.c @@ -1848,11 +1848,40 @@ gfc_check_element_vs_element (gfc_ref *lref, gfc_ref *rref, int n) return GFC_DEP_EQUAL; } +/* Callback function for checking if an expression depends on a + dummy variable which is any other than INTENT(IN). */ + +static int +callback_dummy_intent_not_in (gfc_expr **ep, + int *walk_subtrees ATTRIBUTE_UNUSED, + void *data ATTRIBUTE_UNUSED) +{ + gfc_expr *e = *ep; + + if (e->expr_type == EXPR_VARIABLE && e->symtree + && e->symtree->n.sym->attr.dummy) + return e->symtree->n.sym->attr.intent != INTENT_IN; + else + return 0; +} + +/* Auxiliary function to check if subexpressions have dummy variables which + are not intent(in). +*/ + +static bool +dummy_intent_not_in (gfc_expr **ep) +{ + return gfc_expr_walker (ep, callback_dummy_intent_not_in, NULL); +} /* Determine if an array ref, usually an array section specifies the entire array. In addition, if the second, pointer argument is provided, the function will return true if the reference is - contiguous; eg. (:, 1) gives true but (1,:) gives false. */ + contiguous; eg. (:, 1) gives true but (1,:) gives false. + If one of the bounds depends on a dummy variable which is + not INTENT(IN), also return false, because the user may + have changed the variable. */ bool gfc_full_array_ref_p (gfc_ref *ref, bool *contiguous) @@ -1916,14 +1945,16 @@ gfc_full_array_ref_p (gfc_ref *ref, bool *contiguous) && (!ref->u.ar.as || !ref->u.ar.as->lower[i] || gfc_dep_compare_expr (ref->u.ar.start[i], - ref->u.ar.as->lower[i]))) + ref->u.ar.as->lower[i]) + || dummy_intent_not_in (&ref->u.ar.start[i]))) lbound_OK = false; /* Check the upper bound. */ if (ref->u.ar.end[i] && (!ref->u.ar.as || !ref->u.ar.as->upper[i] || gfc_dep_compare_expr (ref->u.ar.end[i], - ref->u.ar.as->upper[i]))) + ref->u.ar.as->upper[i]) + || dummy_intent_not_in (&ref->u.ar.end[i]))) ubound_OK = false; /* Check the stride. */ if (ref->u.ar.stride[i] |