target_mem_ref and memory/prefetch intrinsics

[Zdenek Dvorak]

Hi,

> > Anyway, I do not have strong preference for this; for now we can go with taking
> > the address of TARGET_MEM_REFs separately, and see if that is sufficient,
> 
> Except that it can be tricky to tune the RTL forward prop.

I do not see why you would need to tune RTL fwprop?  I think this can all be
done just in gimple->RTL expansion (TER takes care of it even now most of the
time, and could probably be massaged to handle some simple forms of fwprop into
builtins if needed).

Zdenek