diff options
Diffstat (limited to 'gcc/tree-data-ref.c')
| -rw-r--r-- | gcc/tree-data-ref.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/gcc/tree-data-ref.c b/gcc/tree-data-ref.c index d6d9ffcaa34..ed28ca1d6e5 100644 --- a/gcc/tree-data-ref.c +++ b/gcc/tree-data-ref.c @@ -1538,8 +1538,13 @@ initialize_data_dependence_relation (struct data_reference *a, } /* If the references do not access the same object, we do not know - whether they alias or not. */ - if (!operand_equal_p (DR_BASE_OBJECT (a), DR_BASE_OBJECT (b), 0)) + whether they alias or not. We do not care about TBAA or alignment + info so we can use OEP_ADDRESS_OF to avoid false negatives. + But the accesses have to use compatible types as otherwise the + built indices would not match. */ + if (!operand_equal_p (DR_BASE_OBJECT (a), DR_BASE_OBJECT (b), OEP_ADDRESS_OF) + || !types_compatible_p (TREE_TYPE (DR_BASE_OBJECT (a)), + TREE_TYPE (DR_BASE_OBJECT (b)))) { DDR_ARE_DEPENDENT (res) = chrec_dont_know; return res; |