On Thu, Mar 08, 2018 at 06:05:04AM -0300, Alexandre Oliva wrote:
> On Mar 6, 2018, Jakub Jelinek <[email protected]> wrote:
>
> > I'm afraid I haven't understood yet why we need labels instead of compiler
> > assigned numbers for the views,
>
> The compiler can't determine points at which the insn address changes
> reliably (or at all). It's impossible in the general case, considering
> that alignment requests might be fulfilled by an assembler without any
> address change, if the current address was just right, and only the
> assembler would know that.
An upper bound would be fine, count any potential spot where you introduce a
view and if the upper bound fits into 8-bit value, use data1, if into 16-bit
value, use data2, otherwise use data4.
Jakub
