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2f2dec87fb
Normalize select(C0, select(C1, a, b), b) -> select((C0 & C1), a, b) select(C0, a, select(C1, a, b)) -> select((C0 | C1), a, b) This normal form may enable further combines on the And/Or and shortens paths for the values. Many targets prefer the other but can go back easily in CodeGen. Differential Revision: http://reviews.llvm.org/D7399 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@228409 91177308-0d34-0410-b5e6-96231b3b80d8