[PATCH] D55787: [X86] Use UADDSAT/USUBSAT instead of ADDUS/SUBUS

[Nikita Popov via Phabricator via llvm-commits]

nikic updated this revision to Diff 178550.
nikic added a comment.

Handle 256-bit vector split, add vector tests for llvm.uadd.sub, llvm.usub.sat.


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D55787/new/

https://reviews.llvm.org/D55787

Files:
  lib/CodeGen/SelectionDAG/LegalizeIntegerTypes.cpp
  lib/CodeGen/SelectionDAG/LegalizeVectorTypes.cpp
  lib/Target/X86/X86ISelLowering.cpp
  lib/Target/X86/X86ISelLowering.h
  lib/Target/X86/X86InstrAVX512.td
  lib/Target/X86/X86InstrFragmentsSIMD.td
  lib/Target/X86/X86InstrSSE.td
  test/CodeGen/X86/uadd_sat_vec.ll
  test/CodeGen/X86/usub_sat_vec.ll

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