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Commit 03edcd68 authored by Nikolai Bozhenov's avatar Nikolai Bozhenov
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[SCEV] Return zero from computeConstantDifference(X, X) 

Without this patch computeConstantDifference returns None for cases like
these:

  computeConstantDifference(%x, %x)
  computeConstantDifference({%x,+,16}, {%x,+,16})

Differential Revision: https://reviews.llvm.org/D65474

llvm-svn: 368193
parent a1d20506
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