https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110026
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ra
--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to d_vampile from comment #2)
> O0 does miss a lot of optimizations. However, for the problem I mentioned,
> the GPRs used before and the FP registers after modification are used. When
> vectorization is not applicable, the X0 register is faster than the D0
> register. Is it appropriate to modify here?
Well the generic_tunings has:
{ 4, /* load_int. */
4, /* store_int. */
4, /* load_fp. */
4, /* store_fp. */
4, /* load_pred. */
4 /* store_pred. */
}, /* memmov_cost. */
Which says the load/store of fp has the same cost as ints (gprs) (this is the
same as a53's tuning).
If anything that should be changed ....
Of you should use -mcpu=* where appliable.
