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[Bug tree-optimization/21294] Missed removal of null pointer check


------- Additional Comments From pinskia at gcc dot gnu dot org  2005-04-30 01:46 -------
For VRP to catch this, extract_range_from_unary_expr has to be enhanced to deal with ADDR_EXPR.

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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21294


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