[Bug tree-optimization/19097] [4.1/4.2/4.3 regression] Quadratic behavior with many sets for the same register in VRP

[rguenth at gcc dot gnu dot org]

------- Comment #46 from rguenth at gcc dot gnu dot org  2007-11-11 12:16 -------
Note that on the mainline equiv processing can be completely turned off by
just tweaking add_equivalence () to do nothing.

There are a few missed optimizations if you do that, but I belive the important
kind of things there should be done in a separate pass (or DOM, which at least
in the past could do these).


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19097