Ayonam Ray <ayonam@xxxxxxxxx> writes:
> I'm looking for a target macro or a hook by which I can tell the
> optimizer that in Base + Index addressing, my hardware scales the
> Index register by the size of the data being accessed and hence the
> Index register increments (for subsequent accesses) should be by 1 and
> not by the size of the data being accessed.
>
> Is there something like that or do we have to do something different
> in the legitimize_address target hook?
This is a fairly common addressing mode supported by a number of
processors. For a scale factor you should represent the address as
(plus (reg base) (mult (reg index) (const_int scale)))
Make sure that your TARGET_LEGITIMATE_ADDRESS_P hook recognizes that
sort of address, with the appropriate scale factor depending on the
mode. You shouldn't need to do much else.
Ian
