[PATCH][AArch64] Fix symbol offset limit

[Richard Sandiford]

Richard Sandiford <richard.sandiford@arm.com> writes:
> Wilco Dijkstra <Wilco.Dijkstra@arm.com> writes:
>> We can do all kinds of arithmetic based on pointers, either using
>> pointer types or converted to uintptr_t. Note that the optimizer
>> actually creates these expressions, for example arr[N-x] can be
>> evaluated as (&arr[0] + N) - x.  So this remains legal even if N is
>> well outside the bounds of the array.
>
> Yeah, true, and I remember valid "x[n - big_offset]" -> invalid
> "x + big_offset - n" being a problem for MIPS too.  It was one of
> the things offset_within_block_p was helping to avoid.

Doh, I of course meant "x - big_offset + n" here ;-)