Amara Emerson 4c55cdb00a [GlobalISel] Fix known bits for G_BSWAP and B_BITREVERSE not doing anything. ...

llvm::KnownBits::byteSwap() and reverse() don't modify in-place, so
we weren't actually computing anything. This was causing a miscompile on an
arm64 stage2 bootstrap clang build.

2021-07-17 23:07:16 -07:00

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