[Bug rtl-optimization/19097] [3.4/4.0/4.1 regression] Quadratic behavior with many sets for the same register in gcse CPROP

[steven at gcc dot gnu dot org]

------- Additional Comments From steven at gcc dot gnu dot org  2005-03-05 23:37 -------
I don't think this will be fixed for 4.1, unless we kick out implicit 
sets from gcse, or all of gcse.  The former may be possible if our 
const/copy prop at the tree level is good enough, but I wouldn't count 
on it. 

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