How to check that two ssa registers have the same symbolic value

Jeffrey Law law@redhat.com
Tue May 29 17:24:00 GMT 2007


On Tue, 2007-05-29 at 13:05 -0400, Daniel Berlin wrote:
> On 5/29/07, Jeffrey Law <law@redhat.com> wrote:
> 
> >
> > Note that this form of  code hoisting is generally a win from a
> > codesize standpoint.  We have an RTL implementation, but not a
> > tree-ssa implementation IIRC.
> 
> tree level PRE knows it could hoist these things (and they are marked
> as such), but we simply don't do it because it's not a partial
> redundancy.
Yup.  That's exactly what I would have expected.

Jeff



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