Duncan Sands fbb9ac3cca Add a generic expansion transform: A op (B op' C) -> (A op B) op' (A op C) ...

if both A op B and A op C simplify.  This fires fairly often but doesn't
make that much difference.  On gcc-as-one-file it removes two "and"s and
turns one branch into a select.

llvm-svn: 122399

2010-12-22 13:36:08 +00:00

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