[PATCH] D28979: [X86] Add demanded elts support for the inputs to pclmul intrinsic

[Craig Topper via Phabricator via llvm-commits]

craig.topper updated this revision to Diff 85694.
craig.topper added a comment.

Convert to zero if either input is undef.


https://reviews.llvm.org/D28979

Files:
  lib/Transforms/InstCombine/InstCombineCalls.cpp
  test/Transforms/InstCombine/x86-clmulqdq.ll

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