Re: i386/asm-4 test: use amd64's natural addressing mode on all OSs

[Uros Bizjak <ubizjak at gmail dot com>]

On Thu, Aug 15, 2019 at 3:47 PM Alexandre Oliva <oliva@adacore.com> wrote:
>
> On Aug 15, 2019, Uros Bizjak <ubizjak@gmail.com> wrote:
>
> > The immediate of lea is limited to +-2GB
>
> ... and we're talking about a code offset within a tiny translation
> unit, with both reference and referenced address within the same
> section.  It would be very surprising if the offset got up to 2KB, let
> alone 2GB ;-)
>
> The reason the testcase even mentions absolute addresses AFAICT is not
> that it wishes to use them, it's that there's no portable way to use
> PC-relative addresses on IA-32 (*), so the test gives up on platforms
> that mandate PIC and goes with absolute addressing there.  I'm pretty
> sure if it had a choice it would happily use PC-relative addressing,
> even with a reasonably short range, if that was readily available...
>
> (*) Something like 'call 1f; 1: popl %0; leal $foo-1b(%0), %0' is the
> closest to widely available I'm aware of, but the '1f/1b' notation is
> only available with GNU as AFAIK.

Well, OK ... let's go ahead with your patch then.

Thanks,
Uros.