[Bug target/21479] optimizer removes incorrectly variable comparision in if clause

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2005-05-09 
22:32 -------
Oh, one more thing, deferencing a null pointer is undefined by the C standard.

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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21479