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Roman Tereshin
051da15b1e
The second source operand of G_SHL, G_ASHR, and G_LSHR must preserve its value as a (small) unsigned integer, therefore its incorrect to widen it in any way but by zero extending it. G_SHL was using G_ANYEXT and G_ASHR - G_SEXT (which is correct for their destination and first source operands, but not the "number of bits to shift" operand). Generally, shifts aren't as similar to regular binary operations as it might seem, for instance, they aren't commutative nor associative and the second source operand usually requires a special treatment. Reviewers: bogner, javed.absar, aivchenk, rovka Reviewed By: bogner Subscribers: igorb, kristof.beyls, llvm-commits Differential Revision: https://reviews.llvm.org/D46413 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@331926 91177308-0d34-0410-b5e6-96231b3b80d8