https://gcc.gnu.org/bugzilla/show_bug.cgi?id=122979
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |needs-bisection,
| |needs-reduction, wrong-code
Last reconfirmed| |2025-12-04
Version|unknown |16.0
Status|UNCONFIRMED |NEW
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
-fno-tree-vectorize doesn't help, disabling late unrolling helps, so the issue
must be after that pass.
There's warnings like
t.c:77:14: warning: ‘am’ accessing 8 bytes in a region of size 4
[-Wstringop-overflow=]
77 | int main() { am(p, 2, (int(*)[])r); }
| ^~~~~~~~~~~~~~~~~~~~~
even at -O2, so checking the testcase for validity is necessary as well.
