[PATCH] D13632: AVX512 : i8/i16 vector CTLZ/CTLZ_ZERO_UNDEF lowering

[Igor Breger via llvm-commits]

igorb created this revision.
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AVX512: Lowering i8/i16 vector CTLZ using the dword LZCNT vector instruction  ( sub(trunc(lzcnt(zext32(x)))) ). 

Repository:
  rL LLVM

http://reviews.llvm.org/D13632

Files:
  lib/Target/X86/X86ISelLowering.cpp
  lib/Target/X86/X86InstrAVX512.td
  test/CodeGen/X86/vector-lzcnt-128.ll
  test/CodeGen/X86/vector-lzcnt-256.ll
  test/CodeGen/X86/vector-lzcnt-512.ll

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