Vector pointer modes

[Andrew Stubbs]

Hi all,

I'm in the process of trying to update our AMD GCN port from GCC 7 to 
GCC 8+, but I've hit a problem ...

It seems there's a new assumption that pointers and addresses will be 
scalar, but GCN load instructions require vectors of pointers. 
Basically, machine_mode has been replaced with scalar_int_machine mode 
in many places, and we were relying on vector modes being allowed.

The changes are all coming from the Richard Sandiford's SVE patches.

Is there a new way of dealing with vectors of pointers?

Thanks

Andrew