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Re: Tree-SSA self checking infrastructure
On Wed, 2003-11-19 at 16:33, Jan Hubicka wrote:
> > Yes. I don't know anything about tree sharing rules. I expect we
> > can't share much.
>
> I think we do pretty heavy shaing via CCP that does move around the
> constant PLUS_EXPRs and friends. I am not even aware of way to copy
> tree expressions.
>
Eh, no. That shouldn't happen. We share only DECLs and perhaps
constants. In particular, we should not be sharing expressions that are
going to be re-written. Otherwise the SSA renamer pass munges up the
program real good.
> THis is nice, however
> I am mostly concerned about constants like &a+8 and so.
> We are allowing them as gimple operands, or did you changed this?
>
&a+8 should be a gimple_val, yes. We were missing an obvious VUSE when
used as a CALL_EXPR argument. I thought you had fixed that (or did it
get reverted as well?).
Diego.