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cac03419a6
This allOnes function hits undefined behaviour if Count is greater than 64, but we can avoid that and simplify the calculation by just saturating if such a value is passed in. This comes up under ubsan becauseRxSBGOperands is sometimes created with values that are 128 bits wide. Somebody more familiar with this code should probably look into whether that's expected, as a 64 bit mask may or may not be appropriate for such types. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@240520 91177308-0d34-0410-b5e6-96231b3b80d8
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