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Re: some tree-ssa vs mainline stats
- From: Andrew MacLeod <amacleod at redhat dot com>
- To: Jeff Law <law at redhat dot com>
- Cc: Steven Bosscher <s dot bosscher at student dot tudelft dot nl>, Dan Nicolaescu <dann at ics dot uci dot edu>, gcc mailing list <gcc at gcc dot gnu dot org>
- Date: 20 Jun 2003 15:29:47 -0400
- Subject: Re: some tree-ssa vs mainline stats
- References: <200306201432.h5KEWDRd006239@speedy.slc.redhat.com>
On Fri, 2003-06-20 at 10:32, law@redhat.com wrote:
>
> >
> >I don't suppose that the gimplifier knows when its done with a
> >temporary? They aren't live past a stmt boundry are they?
> It doesn't know. I don't think an are life past the original
> statement boundary when we're done with gimplifying. However
> be aware that we have a formal temporary table now and try
> to ensure that every time we evaluate a pure expression the
> destination is the same formal temporary.
>
But presumably, if nothing is live out a stmt, all the temporaries are
available after every stmt, so the same ones ought to be available for
the next stmt which is the same...
Andrew