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Abs/neg folding has moved out of foldOperands and into the instruction selection phase using complex patterns. As a consequence of this change, we now prefer to select the 64-bit encoding for most instructions and the modifier operands have been dropped from integer VOP3 instructions. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@214467 91177308-0d34-0410-b5e6-96231b3b80d8
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