Re: [PATCH] fix arm neon ICE by widening tree_type's precision field

[Jakub Jelinek <jakub@redhat.com>]

On Mon, Jun 08, 2009 at 03:52:11PM -0400, Daniel Jacobowitz wrote:
> In order to get good code out of these, I think we'd need to represent
> early on that the single gimple operation set three different vectors
> (SSA?  What SSA?)  Also we'd need to somehow do sensible register
> allocation for these constraints.
> 
> Instead, we do not support these in the vectorizer; use unions for
> the intrinsics (which do not get scalarized, so perhaps the new SRA
> will help here), and fake it with these huge partial modes during RTL
> expansion.  See the XImode patterns in neon.md for examples.
> 
> Any ideas? :-)

Why do you need the big modes?  If the insn does load from memory into
a couple of registers (or stores from couple of registers into memory),
why can't you just use a parallel with all those stores in it?
See e.g. s390.md for load_multiple and store_multiple...

	Jakub