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Re: [RFC] Contributing tree-ssa to mainline
- From: Andrew Pinski <pinskia at physics dot uc dot edu>
- To: kenner at vlsi1 dot ultra dot nyu dot edu (Richard Kenner)
- Cc: dnovillo at redhat dot com, gcc at gcc dot gnu dot org, Andrew Pinski <pinskia at physics dot uc dot edu>
- Date: Mon, 19 Jan 2004 14:40:40 -0800
- Subject: Re: [RFC] Contributing tree-ssa to mainline
- References: <10401191507.AA28782@vlsi1.ultra.nyu.edu>
On Jan 19, 2004, at 07:07, Richard Kenner wrote:
Good, because that's my concern: the form of the subscript information
is
critical to many high-level loop optimizations. If you're going to
have to
figure that out from an address computation, you're giving up much of
the
benefit of doing that optimization on trees instead of RTL>
But any alias/loop optimization cannot really be done on targets like
IA64 with almost no
offset. The IA64 has only room for a zero offset, every thing is done
in index form.
Thanks,
Andrew Pinski