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Re: [tree-ssa] More aliasing fixes


In message <1071756491.4769.6.camel@frodo.toronto.redhat.com>, Diego Novillo wr
ites:
 >On Thu, 2003-12-18 at 08:45, Jan Hubicka wrote:
 >
 >> But DOM shall not invalidate A's value just because P's MT is writen
 >> into.  A's tag is not.
 >>
 >It will.  Value numbering uses all the virtual operands.
More correctly, DOM does not invalidate values.  But a change in the virtual
operands will change the hash for the expression.

 >> Still have to find time to think it over.  Jeff also mentioned some SGI
 >> paper about the issue, do you have pointer by any chance?
 >> 
 >SGI paper?  I don't recall an SGI paper talking about this.  Sorry.

He's referring to the SGI paper which talks about how to handle aliasing
and memory operands in SSA form.

jeff



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