[Bug tree-optimization/41488] IVOpts cannot coalesce multiple induction variables

[rguenth at gcc dot gnu dot org]

------- Comment #3 from rguenth at gcc dot gnu dot org  2009-09-30 13:17 -------
The issue here is that loop header copying creates a new induction variable
by moving the use before the definition of D.2708_4 = start_3(D) + i_12.

So it just does what we teach PRE not to do ...


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41488