Regarding artificial vars in GCC

[Prashant Singh Rawat]

1. For all the artificial variables created in GIMPLE (eg. x.2 for x),
is there any way to extract the original var tree x from x.2 (for any
pass that is not in SSA)?
2. Are these temporary variables live beyond the basic block in which
they are assigned values?
 For example,
<bb 2> :
      x.2 = x;
      ...
Is there a possibility that x.2 is used in any other basic block
before reassigning a value? In other words, is it safe to discard any
dataflow value associated with x.2 at the end of <bb 2> ?

--
With regards,
Prashant Singh Rawat
http://www.cse.iitb.ac.in/~prashantr