https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111137
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Ever confirmed|0 |1
Known to fail| |11.1.0
Summary|[12/13/14 Regression] Wrong |[11/12/13/14 Regression]
|code at -O2/3 since |Wrong code at -O2/3
|r12-1000-g6924b5e6bd3 |
Known to work| |10.5.0
Last reconfirmed| |2023-08-24
Status|UNCONFIRMED |NEW
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Reduced a little further:
```
int b[3][8];
short d;
volatile int t = 1;
int main() {
int g = t;
for (int e = 1; e >= 0; e--) {
d = 1;
for (; d >= 0; d--) {
b[0][d * 2 + 1] = 0;
b[g - 1 + d][0] ^= 1;
b[0][d * 2 + 2] = 0;
b[g - 1 + d][1] ^= 1;
}
}
if (b[0][1] != 1)
__builtin_abort();
}
```
Note this fails with GCC 11.1.0 with `-O2 -ftree-vectorize` but passes with
`-O3` .
