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| author | Richard Biener <rguenther@suse.de> | 2017-04-06 13:56:35 +0000 |
|---|---|---|
| committer | Richard Biener <rguenth@gcc.gnu.org> | 2017-04-06 13:56:35 +0000 |
| commit | 09b63f67a11096fb9aa163f9936909bded2e690b (patch) | |
| tree | da3f3563b3e45068a62272cac655c0a59901f435 /gcc/tree-ssa-loop-ivopts.c | |
| parent | d9f8c5af8bc43681764923379dc465b62b56877a (diff) | |
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re PR tree-optimization/80334 (Segfault when taking address of copy of unaligned struct)
2017-04-06 Richard Biener <rguenther@suse.de>
PR tree-optimization/80334
* tree-ssa-loop-ivopts.c (rewrite_use_address): Properly
preserve alignment of accesses.
* g++.dg/torture/pr80334.C: New testcase.
From-SVN: r246731
Diffstat (limited to 'gcc/tree-ssa-loop-ivopts.c')
| -rw-r--r-- | gcc/tree-ssa-loop-ivopts.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/gcc/tree-ssa-loop-ivopts.c b/gcc/tree-ssa-loop-ivopts.c index 72e3ff9..d5bd036 100644 --- a/gcc/tree-ssa-loop-ivopts.c +++ b/gcc/tree-ssa-loop-ivopts.c @@ -7396,7 +7396,11 @@ rewrite_use_address (struct ivopts_data *data, base_hint = var_at_stmt (data->current_loop, cand, use->stmt); iv = var_at_stmt (data->current_loop, cand, use->stmt); - ref = create_mem_ref (&bsi, TREE_TYPE (*use->op_p), &aff, + tree type = TREE_TYPE (*use->op_p); + unsigned int align = get_object_alignment (*use->op_p); + if (align != TYPE_ALIGN (type)) + type = build_aligned_type (type, align); + ref = create_mem_ref (&bsi, type, &aff, reference_alias_ptr_type (*use->op_p), iv, base_hint, data->speed); copy_ref_info (ref, *use->op_p); |