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Date: Thu, 01 Sep 2005 00:42:00 -0000
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From: "pinskia at gcc dot gnu dot org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug middle-end/23664] fold does not change (a&C1)+(b&C2) to (a&C1)|(b&C2) iff (C1 & C2) == 0
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------- 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