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| author | Jakub Jelinek <jakub@redhat.com> | 2018-03-19 21:49:57 +0100 |
|---|---|---|
| committer | Jakub Jelinek <jakub@gcc.gnu.org> | 2018-03-19 21:49:57 +0100 |
| commit | f87b4b2fbfb3f0cbfe120666718408442900ff19 (patch) | |
| tree | 2ca00b572a7473799987dabf491e1bcbffbd0395 /gcc/gimple-ssa-store-merging.c | |
| parent | 90841d4302e804d0eafdd5e9565cda2d5ec166a8 (diff) | |
re PR tree-optimization/84946 (UBSAN: in mem_valid_for_store_merging ../../gcc/gimple-ssa-store-merging.c:3951)
PR tree-optimization/84946
* gimple-ssa-store-merging.c (mem_valid_for_store_merging): Compute
bitsize + bitsize in poly_uint64 rather than poly_int64.
From-SVN: r258665
Diffstat (limited to 'gcc/gimple-ssa-store-merging.c')
| -rw-r--r-- | gcc/gimple-ssa-store-merging.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/gcc/gimple-ssa-store-merging.c b/gcc/gimple-ssa-store-merging.c index 7b56031fd47..5955d6e1abc 100644 --- a/gcc/gimple-ssa-store-merging.c +++ b/gcc/gimple-ssa-store-merging.c @@ -3948,7 +3948,8 @@ mem_valid_for_store_merging (tree mem, poly_uint64 *pbitsize, if (known_eq (bitregion_end, 0U)) { bitregion_start = round_down_to_byte_boundary (bitpos); - bitregion_end = round_up_to_byte_boundary (bitpos + bitsize); + bitregion_end = bitpos; + bitregion_end = round_up_to_byte_boundary (bitregion_end + bitsize); } if (offset != NULL_TREE) |