[Bug tree-optimization/18828] [4.0 Regression] Extraneous warning with var_start and optimization

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2004-12-22 07:45 -------
Note we don't produce wrong code with this example but that is because I made sure we don't but the 
problem is that we don't know that we should not prograte into __builtin_var_start.

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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18828