diff options
Diffstat (limited to 'gcc/fortran/array.cc')
| -rw-r--r-- | gcc/fortran/array.cc | 27 |
1 files changed, 16 insertions, 11 deletions
diff --git a/gcc/fortran/array.cc b/gcc/fortran/array.cc index 90ea812..bbdb5b3 100644 --- a/gcc/fortran/array.cc +++ b/gcc/fortran/array.cc @@ -957,23 +957,28 @@ gfc_copy_array_spec (gfc_array_spec *src) } -/* Returns nonzero if the two expressions are equal. Only handles integer - constants. */ +/* Returns nonzero if the two expressions are equal. + We should not need to support more than constant values, as that’s what is + allowed in derived type component array spec. However, we may create types + with non-constant array spec for dummy variable class container types, for + which the _data component holds the array spec of the variable declaration. + So we have to support non-constant bounds as well. */ -static int +static bool compare_bounds (gfc_expr *bound1, gfc_expr *bound2) { if (bound1 == NULL || bound2 == NULL - || bound1->expr_type != EXPR_CONSTANT - || bound2->expr_type != EXPR_CONSTANT || bound1->ts.type != BT_INTEGER || bound2->ts.type != BT_INTEGER) gfc_internal_error ("gfc_compare_array_spec(): Array spec clobbered"); - if (mpz_cmp (bound1->value.integer, bound2->value.integer) == 0) - return 1; - else - return 0; + /* What qualifies as identical bounds? We could probably just check that the + expressions are exact clones. We avoid rewriting a specific comparison + function and re-use instead the rather involved gfc_dep_compare_expr which + is just a bit more permissive, as it can also detect identical values for + some mismatching expressions (extra parenthesis, swapped operands, unary + plus, etc). It probably only makes a difference in corner cases. */ + return gfc_dep_compare_expr (bound1, bound2) == 0; } @@ -1006,10 +1011,10 @@ gfc_compare_array_spec (gfc_array_spec *as1, gfc_array_spec *as2) if (as1->type == AS_EXPLICIT) for (i = 0; i < as1->rank + as1->corank; i++) { - if (compare_bounds (as1->lower[i], as2->lower[i]) == 0) + if (!compare_bounds (as1->lower[i], as2->lower[i])) return 0; - if (compare_bounds (as1->upper[i], as2->upper[i]) == 0) + if (!compare_bounds (as1->upper[i], as2->upper[i])) return 0; } |