[Bug tree-optimization/23940] SSA_NAMEs are not released after no longer being used.

[amacleod at redhat dot com]

------- Additional Comments From amacleod at redhat dot com  2005-09-19 18:10 -------
Do you mean SSA_NAME_DEF_FOR_STMT for i_4 would NOT be NULLed since we didnt
call bsi_remove on it? 

if it is NULL, then it has no uses and we can simply remove it with the trip
through the SSA_NAME table.

If it isn't NULL is when we have the problem that needs resolving. The operand
cache has a list of any virtual defs that are being thrown away after processing
each  statement, we might be able to catch them all there, I'd have to check it out.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23940