diff options
Diffstat (limited to 'gcc/fold-const.c')
| -rw-r--r-- | gcc/fold-const.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/gcc/fold-const.c b/gcc/fold-const.c index ad4770b..3d63836 100644 --- a/gcc/fold-const.c +++ b/gcc/fold-const.c @@ -4133,7 +4133,11 @@ decode_field_reference (location_t loc, tree *exp_, HOST_WIDE_INT *pbitsize, punsignedp, preversep, pvolatilep); if ((inner == exp && and_mask == 0) || *pbitsize < 0 || offset != 0 - || TREE_CODE (inner) == PLACEHOLDER_EXPR) + || TREE_CODE (inner) == PLACEHOLDER_EXPR + /* Reject out-of-bound accesses (PR79731). */ + || (! AGGREGATE_TYPE_P (TREE_TYPE (inner)) + && compare_tree_int (TYPE_SIZE (TREE_TYPE (inner)), + *pbitpos + *pbitsize) < 0)) return 0; *exp_ = exp; |