Hi Richard,
> I was worried that reusing "dest" for intermediate results would
> prevent CSE for cases like:
>
> void g (long long, long long);
> void
> f (long long *ptr)
> {
> g (0xee11ee22ee11ee22LL, 0xdc23dc44ee11ee22LL);
> }
Note that aarch64_internal_mov_immediate may be called after reload,
so it would end up even more complex. This should be done as a
dedicated mid-end optimization similar to TARGET_CONST_ANCHOR.
However the number of 3/4-instruction immediates is so small that
sharable cases would be very rare, so I don't believe it is worth it.
Cheers,
Wilco
