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| author | Jim Wilson <wilson@gcc.gnu.org> | 1993-05-06 11:02:26 -0700 |
|---|---|---|
| committer | Jim Wilson <wilson@gcc.gnu.org> | 1993-05-06 11:02:26 -0700 |
| commit | ea8dd78442e6119d42dcd7bbcc18b322497d1f59 (patch) | |
| tree | 0f24d3e508ff40b1a5b9c217d41e1261d4927bd0 /gcc | |
| parent | 9ea0a7533cf9d9727fbb6c8d606c67da145c2572 (diff) | |
| download | gcc-ea8dd78442e6119d42dcd7bbcc18b322497d1f59.zip gcc-ea8dd78442e6119d42dcd7bbcc18b322497d1f59.tar.gz gcc-ea8dd78442e6119d42dcd7bbcc18b322497d1f59.tar.bz2 | |
(pointer_diff): Error if op1 is pointer to incomplete type.
From-SVN: r4367
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/c-typeck.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/gcc/c-typeck.c b/gcc/c-typeck.c index 088e877..2e3b018 100644 --- a/gcc/c-typeck.c +++ b/gcc/c-typeck.c @@ -2944,6 +2944,10 @@ pointer_diff (op0, op1) op0 = build_binary_op (MINUS_EXPR, convert (restype, op0), convert (restype, op1), 1); + /* This generates an error if op1 is pointer to incomplete type. */ + if (TYPE_SIZE (TREE_TYPE (TREE_TYPE (op1))) == 0) + error ("arithmetic on pointer to an incomplete type"); + /* This generates an error if op0 is pointer to incomplete type. */ op1 = c_size_in_bytes (target_type); /* Divide by the size, in easiest possible way. */ |