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Re: More on gimplify:create_tmp_var
- From: Richard Henderson <rth at redhat dot com>
- To: Richard Kenner <kenner at vlsi1 dot ultra dot nyu dot edu>
- Cc: jason at redhat dot com, gcc at gcc dot gnu dot org
- Date: Wed, 9 Jun 2004 17:37:44 -0700
- Subject: Re: More on gimplify:create_tmp_var
- References: <10406100028.AA03841@vlsi1.ultra.nyu.edu>
On Wed, Jun 09, 2004 at 08:28:40PM -0400, Richard Kenner wrote:
> Also note that we have to able to propagate this down to RTL in MEM_EXPR, so
> we need to keep the chain intact.
Not necessarily. The tree-level optimizers have *significantly*
better variable-level aliasing information to draw from. Stuff
that can't be represented in MEM_EXPR at all. In order to preserve
this at the rtl level, we're considering a partitioning scheme
that can pass down *everything* via alias sets.
In short, I'm wouldn't worry about it.
r~