[Bug tree-optimization/34244] [4.3 Regression] VRP/SCEV miscompiles Firefox

[rguenth at gcc dot gnu dot org]

------- Comment #6 from rguenth at gcc dot gnu dot org  2007-11-28 15:47 -------
We could clear the SCEV cache for an SSA_NAME we set a new value range
(in set_value_range and set_value_range_to_varying), but I
see that SCEV also caches loop->nb_iterations which we probably would need to
clear unconditionally (for all loops).


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34244