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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/15826] don't use "if" to extract a single bit bit-field.
Date: Mon, 01 Dec 2014 14:07:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=15826

--- Comment #9 from Richard Biener <rguenth at gcc dot gnu.org> ---
Which boils down to the premature fold-const.c:optimize_bit_field_compare
which creates this BIT_FIELD_REF (fold_truth_andor_1 does similar stupid
stuff).