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cb0b058905
This is guarded by shouldChangeType(), so the tests show that we don't do the fold if the narrower type is not legal. Note that there is a proposal (D42424) that would change the results for the specific cases shown in these tests. That difference is also discussed in PR35792: https://bugs.llvm.org/show_bug.cgi?id=35792 Alive proofs for the cases handled here as well as the bitwise logic binops that we should already do better on: https://rise4fun.com/Alive/c97 https://rise4fun.com/Alive/Lc5E https://rise4fun.com/Alive/kdf llvm-svn: 323437