https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101173
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |9.5
Keywords| |wrong-code
CC| |amker at gcc dot gnu.org
Summary|wrong code at -O3 on |[9/10/11/12 Regression]
|x86_64-linux-gnu |wrong code at -O3 on
| |x86_64-linux-gnu
Ever confirmed|0 |1
Version|unknown |12.0
Known to work| |7.5.0
Priority|P3 |P2
Last reconfirmed| |2021-06-23
Status|UNCONFIRMED |NEW
Known to fail| |8.5.0
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed.
int a[6][9];
int c;
int main()
{
a[1][3] = 8;
for (int b = 1; b <= 5; b++)
for (int d = 0; d <= 5; d++)
for (c = 0; c <= 5; c++)
a[b][c] = a[b][c + 2] & 216;
for (int e = 0; e < 6; e++)
for (int f = 0; f < 9; f++)
if (a[e][f] != 0)
__builtin_abort ();
return 0;
}
Fails with -O -floop-interchange already.
