diff options
| author | Richard Biener <rguenther@suse.de> | 2025-01-28 16:20:30 +0100 |
|---|---|---|
| committer | Richard Biener <rguenth@gcc.gnu.org> | 2025-01-28 16:50:07 +0100 |
| commit | 54bdeca3c6214485d15454df30183a56ad3e473b (patch) | |
| tree | d8c284208420e802cb43f58779f096f4a27d1fd5 /libgcc | |
| parent | 50c37516958319e10a137d2b3dba7b070523248a (diff) | |
| download | gcc-54bdeca3c6214485d15454df30183a56ad3e473b.zip gcc-54bdeca3c6214485d15454df30183a56ad3e473b.tar.gz gcc-54bdeca3c6214485d15454df30183a56ad3e473b.tar.bz2 | |
middle-end/118684 - wrongly aligned stack local during expansion
The following fixes a not properly aligned stack temporary created
during RTL expansion of a MEM_REF that we handle as a BIT_FIELD_REF
whose base was allocated to a register but which was originally
aligned to allow a larger load not trapping. While probably UB
in C the vectorizer creates aligned accesses that might overread
a (static) allocation because it is then known not to trap.
PR middle-end/118684
* expr.cc (expand_expr_real_1): When expanding a reference
based on a register and we end up needing a MEM make sure
that's aligned as the original reference required.
* gcc.dg/pr118684.c: New testcase.
Diffstat (limited to 'libgcc')
0 files changed, 0 insertions, 0 deletions