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Commit 5fff5c7b authored by Michael Liao's avatar Michael Liao
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Enhance boolean simplification to handle 16-/64-bit RDRAND 

- RDRAND always clears the destination value when a random value is not
  available (i.e. CF == 0). This value is truncated or zero-extended as
  the false boolean value to be returned. Boolean simplification needs
  to skip this 'zext' or 'trunc' node.

llvm-svn: 178312
parent 4b04e66c
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