[Bug middle-end/23664] fold does not change (a&C1)+(b&C2) to (a&C1)|(b&C2) iff (C1 & C2) == 0

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2005-09-01 
00:42 -------
I should give credit to LLVM's instruction combine pass which have this.

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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23664