[PATCH] [SLPVectorizer] Reorder operands of shufflevector if it can result in a vectorized code.

[Michael Zolotukhin]

Hi Karthik,

Yes, you're right about my example. But we can modify it in the following way:

  a[0]+c[0]    b[0]
  a[3]/d[3]    b[1]
  b[2]         b[2]
  a[1]*c[1]    b[3]

If I'm not mistaken, we'll transform it to

  a[0]+c[0]    b[0]
  a[3]/d[3]    b[1]
  b[2]         b[2]
  b[3]         a[1]*c[1]

Thanks,
Michael


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http://reviews.llvm.org/D6677

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