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Commit bf6007bd authored by Zijiao Ma's avatar Zijiao Ma
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Make the canonicalisation on shifts benifit to more case. 

1.Fix pessimized case in FIXME.
2.Add tests for it.
3.The canonicalisation on shifts results in different sequence for
  tests of machine-licm.Correct some check lines.

Differential Revision: https://reviews.llvm.org/D27916

llvm-svn: 290410
parent 37c178b6
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