https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103832
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |INVALID
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
You are using the attribute aligned incorrectly.
aligned_float *data = static_cast<aligned_float *>(aligned_alloc(64,
8192*sizeof(float)));
float sum = 0.0f;
for (int i=1; i<8192; i++)
sum += data[i];
You are saying data+i are all 64byte aligned which is obviously not correct.
If you want to say data+0 is aligned at a 64byte boundary you should use
instead __builtin_assume_aligned .
https://gcc.gnu.org/onlinedocs/gcc-11.2.0/gcc/Other-Builtins.html#index-_005f_005fbuiltin_005fassume_005faligned
