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| author | Jakub Jelinek <jakub@redhat.com> | 2018-11-01 13:31:45 +0100 |
|---|---|---|
| committer | Jakub Jelinek <jakub@gcc.gnu.org> | 2018-11-01 13:31:45 +0100 |
| commit | 444cda74708a494cc814951fe29d4904cec4f7e2 (patch) | |
| tree | 87a889af7f57b2997af0c48d68fb490e0ae00400 /gcc/gimple-ssa-store-merging.c | |
| parent | 86ba9ce62614375784f5ce92d711e00db391d81e (diff) | |
re PR tree-optimization/87826 (ubsan: gimple-ssa-store-merging.c:281)
PR tree-optimization/87826
* gimple-ssa-store-merging.c (do_shift_rotate): Punt if count is
negative or larger or equal to type's precision.
* gcc.dg/pr87826.c: New test.
From-SVN: r265720
Diffstat (limited to 'gcc/gimple-ssa-store-merging.c')
| -rw-r--r-- | gcc/gimple-ssa-store-merging.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/gcc/gimple-ssa-store-merging.c b/gcc/gimple-ssa-store-merging.c index e1ddcb5e558..5e5823c44a0 100644 --- a/gcc/gimple-ssa-store-merging.c +++ b/gcc/gimple-ssa-store-merging.c @@ -262,7 +262,9 @@ do_shift_rotate (enum tree_code code, int i, size = TYPE_PRECISION (n->type) / BITS_PER_UNIT; unsigned head_marker; - if (count % BITS_PER_UNIT != 0) + if (count < 0 + || count >= TYPE_PRECISION (n->type) + || count % BITS_PER_UNIT != 0) return false; count = (count / BITS_PER_UNIT) * BITS_PER_MARKER; |