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The FP16_TO_FP node only uses the bottom 16 bits of its input, so the following pattern can be optimised by removing the AND: (FP16_TO_FP (AND op, 0xffff)) -> (FP16_TO_FP op) This is a common pattern for ARM targets when functions have __fp16 arguments, as they are passed as floats (so that they get passed in the correct registers), but then bitcast and truncated to ignore the top 16 bits. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@245832 91177308-0d34-0410-b5e6-96231b3b80d8
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