[PATCH] D30686: [SLP] PR32078: convert scalar operations to vector.

[Alexey Bataev via Phabricator via llvm-commits]

ABataev created this revision.

If we have a code like:

  %xn = extractelement <2 x i32> %x, i32 %n
  %yn = extractelement <2 x i32> %y, i32 %n
  %cmpn = icmp eq i32 %xn, %yn

we can convert it to something like this:

  %cmp = icmp eq <2 x i32> %x, %y
  %cmpn = extractelement <2 x i1> %cmp0, i32 %n

if the cost of the second is less than the cost of the original code.


https://reviews.llvm.org/D30686

Files:
  lib/Transforms/Vectorize/SLPVectorizer.cpp
  test/Transforms/SLPVectorizer/X86/vector.ll

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